From ca8274a20d4c50706f2d40bfc58cba09a9a5c713 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Tue, 16 May 2023 12:57:17 -0400 Subject: ci: Fix 32-bit Linux dependencies --- .github/workflows/ci.yml | 1 + 1 file changed, 1 insertion(+) (limited to '.github/workflows/ci.yml') diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 9db363d..ae65157 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -17,6 +17,7 @@ jobs: sudo apt-get update -y sudo apt-get install -y \ gcc-multilib \ + libgcc-s1:i386 \ acl \ libacl1-dev \ libacl1:i386 \ -- cgit v1.2.3 From a69327f7844ca88ad5b6293bd334e5cb351d9591 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Mon, 12 Jun 2023 13:00:01 -0400 Subject: ci: Use macOS 13 --- .github/workflows/ci.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to '.github/workflows/ci.yml') diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index ae65157..3aacce1 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -43,7 +43,7 @@ jobs: macos: name: macOS - runs-on: macos-latest + runs-on: macos-13 steps: - uses: actions/checkout@v3 -- cgit v1.2.3 From cf2682b4012c397dec79c4998713dfe12744b1a1 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Tue, 20 Jun 2023 13:25:47 -0400 Subject: ci: Set CC=clang16 on FreeBSD Workaround for https://github.com/llvm/llvm-project/issues/58740 --- .github/workflows/ci.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to '.github/workflows/ci.yml') diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 3aacce1..0d15028 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -85,4 +85,4 @@ jobs: run: | spurion=$(tailscale ip -6 spurion) rsync -rl --delete . "[$spurion]:bfs" - ssh "$spurion" 'gmake -C bfs -j$(sysctl -n hw.ncpu) distcheck' + ssh "$spurion" 'gmake -C bfs -j$(sysctl -n hw.ncpu) distcheck CC=clang16' -- cgit v1.2.3 From 8864dc5d1b9c85daa58e98c04767d2ee528f2dea Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Mon, 25 Sep 2023 15:26:52 -0400 Subject: ci/freebsd: Switch to Tailscale OAuth --- .github/workflows/ci.yml | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to '.github/workflows/ci.yml') diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 0d15028..ca1737c 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -70,7 +70,9 @@ jobs: - uses: tailscale/github-action@main with: - authkey: ${{ secrets.TAILSCALE_KEY }} + oauth-client-id: ${{ secrets.TS_OAUTH_CLIENT_ID }} + oauth-secret: ${{ secrets.TS_OAUTH_SECRET }} + tags: tag:ci - name: Configure SSH env: -- cgit v1.2.3 From dba692ca0fb44678fdcc7634d821f04eac2f8042 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Tue, 11 Jul 2023 14:30:52 -0400 Subject: build: Add liburing on Linux --- .github/workflows/ci.yml | 5 +++-- .github/workflows/codecov.yml | 3 ++- .github/workflows/codeql.yml | 3 ++- GNUmakefile | 8 +++++++- README.md | 12 ++++++------ docs/BUILDING.md | 2 ++ 6 files changed, 22 insertions(+), 11 deletions(-) (limited to '.github/workflows/ci.yml') diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index ca1737c..971a4df 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -28,9 +28,10 @@ jobs: libcap-dev \ libcap2:i386 \ libonig-dev \ - libonig5:i386 + libonig5:i386 \ + liburing-dev # Ubuntu doesn't let you install the -dev packages for both amd64 and - # i386 at once, so we make our own symlinks to fix -m32 -lacl -lattr -lcap + # i386 at once, so we make our own symlinks to fix -m32 -lacl -l... sudo ln -s libacl.so.1 /lib/i386-linux-gnu/libacl.so sudo ln -s libattr.so.1 /lib/i386-linux-gnu/libattr.so sudo ln -s libcap.so.2 /lib/i386-linux-gnu/libcap.so diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml index 783cc43..b06ea62 100644 --- a/.github/workflows/codecov.yml +++ b/.github/workflows/codecov.yml @@ -20,7 +20,8 @@ jobs: libattr1-dev \ libcap2-bin \ libcap-dev \ - libonig-dev + libonig-dev \ + liburing-dev - name: Generate coverage run: | diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml index 88e9f3f..3a2f81f 100644 --- a/.github/workflows/codeql.yml +++ b/.github/workflows/codeql.yml @@ -37,7 +37,8 @@ jobs: libattr1-dev \ libcap2-bin \ libcap-dev \ - libonig-dev + libonig-dev \ + liburing-dev - name: Initialize CodeQL uses: github/codeql-action/init@v2 diff --git a/GNUmakefile b/GNUmakefile index 6902979..8154240 100644 --- a/GNUmakefile +++ b/GNUmakefile @@ -126,6 +126,7 @@ ifndef NOLIBS USE_ACL := y USE_ATTR := y USE_LIBCAP := y +USE_LIBURING := y endif ifdef USE_ACL @@ -146,6 +147,11 @@ else LOCAL_CPPFLAGS += -DBFS_USE_SYS_CAPABILITY_H=0 endif +ifdef USE_LIBURING +LOCAL_CPPFLAGS += -DBFS_USE_LIBURING=1 +LOCAL_LDLIBS += -luring +endif + LOCAL_LDFLAGS += -Wl,--as-needed LOCAL_LDLIBS += -lrt endif # Linux @@ -287,7 +293,7 @@ ifneq ($(OS),Darwin) endif +$(MAKE) -B tsan ubsan check CC=clang $(DISTCHECK_FLAGS) ifeq ($(OS) $(ARCH),Linux x86_64) - +$(MAKE) -B check EXTRA_CFLAGS="-m32" ONIG_CONFIG= $(DISTCHECK_FLAGS) + +$(MAKE) -B check EXTRA_CFLAGS="-m32" ONIG_CONFIG= USE_LIBURING= $(DISTCHECK_FLAGS) endif +$(MAKE) -B release check $(DISTCHECK_FLAGS) +$(MAKE) -B check $(DISTCHECK_FLAGS) diff --git a/README.md b/README.md index 18af808..a7ca335 100644 --- a/README.md +++ b/README.md @@ -290,22 +290,22 @@ Here's how to install them on some common platforms: 
 Alpine Linux
-# apk add acl{,-dev} attr{,-dev} libcap{,-dev} oniguruma-dev
+# apk add acl{,-dev} attr{,-dev} libcap{,-dev} liburing-dev oniguruma-dev
 
 Arch Linux
-# pacman -S acl attr libcap oniguruma
+# pacman -S acl attr libcap liburing oniguruma
 
 Debian/Ubuntu
-# apt install acl libacl1-dev attr libattr1-dev libcap2-bin libcap-dev libonig-dev
+# apt install acl libacl1-dev attr libattr1-dev libcap2-bin libcap-dev liburing-dev libonig-dev
 
 Fedora
-# dnf install acl libacl-devel libattr-devel libcap-devel oniguruma-devel
+# dnf install acl libacl-devel libattr-devel libcap-devel liburing-devel oniguruma-devel
 
 NixOS
-# nix-env -i acl attr libcap oniguruma
+# nix-env -i acl attr libcap liburing oniguruma
 
 Void Linux
-# xbps-install -S acl-{devel,progs} attr-{devel,progs} libcap-{devel,progs} oniguruma-devel
+# xbps-install -S acl-{devel,progs} attr-{devel,progs} libcap-{devel,progs} liburing-devel oniguruma-devel
 
 Homebrew
 $ brew install oniguruma
diff --git a/docs/BUILDING.md b/docs/BUILDING.md
index b19ef00..02f9756 100644
--- a/docs/BUILDING.md
+++ b/docs/BUILDING.md
@@ -75,11 +75,13 @@ These dependencies are optional, and can be turned off at build time if necessar
 | [acl]       | Linux only | `USE_ACL`       |
 | [attr]      | Linux only | `USE_ATTR`      |
 | [libcap]    | Linux only | `USE_LIBCAP`    |
+| [liburing]  | Linux only | `USE_LIBURING`  |
 | [Oniguruma] | All        | `USE_ONIGURUMA` |
 
 [acl]: https://savannah.nongnu.org/projects/acl
 [attr]: https://savannah.nongnu.org/projects/attr
 [libcap]: https://sites.google.com/site/fullycapable/
+[liburing]: https://github.com/axboe/liburing
 [Oniguruma]: https://github.com/kkos/oniguruma
 
 ### Dependency tracking
-- 
cgit v1.2.3


From ee6eea07f8a2c73d0b49f8e2199016116a411557 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Tue, 3 Oct 2023 10:11:42 -0400
Subject: ci/macos: Don't install coreutils

Since we build our own touch(1) implementation, we no longer need to
work around the macOS bug.
---
 .github/workflows/ci.yml | 4 ----
 1 file changed, 4 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 971a4df..db7baca 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -49,10 +49,6 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Install dependencies
-        run: |
-          brew install coreutils
-
       - name: Run tests
         run: |
           make -j$(sysctl -n hw.ncpu) distcheck
-- 
cgit v1.2.3


From 9b1ee97d13985f42b09f02c8a25459a910004eb5 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Tue, 3 Oct 2023 10:17:12 -0400
Subject: ci/freebsd: Use tailscale ssh

---
 .github/workflows/ci.yml | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index db7baca..e781055 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -71,17 +71,10 @@ jobs:
           oauth-secret: ${{ secrets.TS_OAUTH_SECRET }}
           tags: tag:ci
 
-      - name: Configure SSH
-        env:
-          SSH_KEY: ${{ secrets.SSH_KEY }}
-        run: |
-          mkdir ~/.ssh
-          printf '%s' "$SSH_KEY" >~/.ssh/github-actions
-          chmod 0600 ~/.ssh/github-actions
-          printf 'Host %s\n\tStrictHostKeyChecking=accept-new\n\tUser github\n\tIdentityFile ~/.ssh/github-actions\n' "$(tailscale ip -6 spurion)" >~/.ssh/config
-
       - name: Run tests
         run: |
           spurion=$(tailscale ip -6 spurion)
+          mkdir ~/.ssh
+          printf 'Host %s\n\tStrictHostKeyChecking=accept-new\n\tUser github\n' "$spurion" >~/.ssh/config
           rsync -rl --delete . "[$spurion]:bfs"
-          ssh "$spurion" 'gmake -C bfs -j$(sysctl -n hw.ncpu) distcheck CC=clang16'
+          ssh "$spurion" '. ~/.ssh/rc; gmake -C bfs -j$(sysctl -n hw.ncpu) distcheck CC=clang16'
-- 
cgit v1.2.3


From 2d0cd364b63e26d7ede70cc1d6f85bea87850d84 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Thu, 5 Oct 2023 17:29:52 -0400
Subject: ci: Install expect for unbuffer

---
 .github/workflows/ci.yml      | 5 +++++
 .github/workflows/codecov.yml | 1 +
 2 files changed, 6 insertions(+)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e781055..065fcfd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,6 +16,7 @@ jobs:
           sudo dpkg --add-architecture i386
           sudo apt-get update -y
           sudo apt-get install -y \
+              expect \
               gcc-multilib \
               libgcc-s1:i386 \
               acl \
@@ -49,6 +50,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
+      - name: Install dependencies
+        run: |
+          brew install expect
+
       - name: Run tests
         run: |
           make -j$(sysctl -n hw.ncpu) distcheck
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index b06ea62..073479a 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -13,6 +13,7 @@ jobs:
         run: |
           sudo apt-get update -y
           sudo apt-get install -y \
+              expect \
               gcc \
               acl \
               libacl1-dev \
-- 
cgit v1.2.3


From 70fe3b12852ca7fb5bf1529042754fc75e69baa0 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Mon, 23 Oct 2023 15:00:31 -0400
Subject: ci: Run tests in parallel on macOS and FreeBSD

---
 .github/workflows/ci.yml | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 065fcfd..bc0719e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -56,7 +56,8 @@ jobs:
 
       - name: Run tests
         run: |
-          make -j$(sysctl -n hw.ncpu) distcheck
+          jobs=$(sysctl -n hw.ncpu)
+          make -j$jobs distcheck JOBS=-j$jobs
 
   freebsd:
     name: FreeBSD
@@ -82,4 +83,4 @@ jobs:
           mkdir ~/.ssh
           printf 'Host %s\n\tStrictHostKeyChecking=accept-new\n\tUser github\n' "$spurion" >~/.ssh/config
           rsync -rl --delete . "[$spurion]:bfs"
-          ssh "$spurion" '. ~/.ssh/rc; gmake -C bfs -j$(sysctl -n hw.ncpu) distcheck CC=clang16'
+          ssh "$spurion" '. ~/.ssh/rc; gmake -C bfs -j$(nproc) distcheck CC=clang16 JOBS=-j$(nproc)'
-- 
cgit v1.2.3


From 1117564e6f06860b826f0bc9d27e7d26b7e56eee Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Mon, 1 Jan 2024 23:43:47 -0500
Subject: ci: Update action and image versions

---
 .github/workflows/ci.yml      | 12 ++++++------
 .github/workflows/codecov.yml |  4 ++--
 .github/workflows/codeql.yml  |  8 ++++----
 3 files changed, 12 insertions(+), 12 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bc0719e..38194f2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,10 +6,10 @@ jobs:
   linux:
     name: Linux
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install dependencies
         run: |
@@ -48,7 +48,7 @@ jobs:
     runs-on: macos-13
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install dependencies
         run: |
@@ -64,14 +64,14 @@ jobs:
 
     if: ${{ github.repository_owner == 'tavianator' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) }}
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     concurrency: spurion
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: tailscale/github-action@main
+      - uses: tailscale/github-action@v2
         with:
           oauth-client-id: ${{ secrets.TS_OAUTH_CLIENT_ID }}
           oauth-secret: ${{ secrets.TS_OAUTH_SECRET }}
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index 073479a..9c2119b 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -4,10 +4,10 @@ on: [push]
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install dependencies
         run: |
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 3a2f81f..71073c6 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -13,7 +13,7 @@ on:
 jobs:
   analyze:
     name: Analyze
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       actions: read
       contents: read
@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         run: |
@@ -41,7 +41,7 @@ jobs:
               liburing-dev
 
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v2
+        uses: github/codeql-action/init@v3
         with:
           languages: cpp
           queries: +security-and-quality
@@ -51,6 +51,6 @@ jobs:
           make -j$(nproc) all
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v2
+        uses: github/codeql-action/analyze@v3
         with:
           category: "/language:cpp"
-- 
cgit v1.2.3


From ee200c07643801c8b53e5b80df704ecbf77a884e Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Sat, 23 Dec 2023 18:13:20 -0500
Subject: ci: Use vmactions/freebsd-vm

---
 .github/workflows/ci.yml | 37 +++++++++++++++++++++----------------
 1 file changed, 21 insertions(+), 16 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 38194f2..701eafc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -62,25 +62,30 @@ jobs:
   freebsd:
     name: FreeBSD
 
-    if: ${{ github.repository_owner == 'tavianator' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) }}
-
     runs-on: ubuntu-22.04
 
-    concurrency: spurion
-
     steps:
       - uses: actions/checkout@v4
 
-      - uses: tailscale/github-action@v2
-        with:
-          oauth-client-id: ${{ secrets.TS_OAUTH_CLIENT_ID }}
-          oauth-secret: ${{ secrets.TS_OAUTH_SECRET }}
-          tags: tag:ci
-
       - name: Run tests
-        run: |
-          spurion=$(tailscale ip -6 spurion)
-          mkdir ~/.ssh
-          printf 'Host %s\n\tStrictHostKeyChecking=accept-new\n\tUser github\n' "$spurion" >~/.ssh/config
-          rsync -rl --delete . "[$spurion]:bfs"
-          ssh "$spurion" '. ~/.ssh/rc; gmake -C bfs -j$(nproc) distcheck CC=clang16 JOBS=-j$(nproc)'
+        uses: vmactions/freebsd-vm@v1
+        with:
+          release: "14.0"
+          usesh: true
+          copyback: false
+
+          prepare: |
+            pkg install -y \
+                bash \
+                expect \
+                gmake \
+                llvm16 \
+                oniguruma \
+                sudo \
+                tcl-wrapper
+            pw useradd -n action -m -G wheel -s /usr/local/bin/bash
+            echo "%wheel ALL=(ALL) NOPASSWD: ALL" >>/usr/local/etc/sudoers
+
+          run: |
+            chown -R action:action .
+            su action -c 'gmake -j$(nproc) distcheck CC=clang16 JOBS=-j$(nproc)'
-- 
cgit v1.2.3


From 683f2c41c72efcb82ce866e3dcc311ac9bd8b66d Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Tue, 2 Jan 2024 10:26:07 -0500
Subject: ci: Add an OpenBSD job

---
 .github/workflows/ci.yml | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 701eafc..ab8805b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -89,3 +89,33 @@ jobs:
           run: |
             chown -R action:action .
             su action -c 'gmake -j$(nproc) distcheck CC=clang16 JOBS=-j$(nproc)'
+
+  openbsd:
+    name: OpenBSD
+
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run tests
+        uses: vmactions/openbsd-vm@v1
+        with:
+          release: "7.4"
+          usesh: true
+          copyback: false
+
+          prepare: |
+            pkg_add \
+                bash \
+                expect \
+                gmake \
+                oniguruma
+            adduser -group USER -batch action wheel >/etc/doas.conf
+
+          run: |
+            chown -R action:action .
+            jobs=$(sysctl -n hw.ncpu)
+            doas -u action gmake -j$jobs check JOBS=-j$jobs TEST_FLAGS="--sudo=doas --verbose=skipped"
-- 
cgit v1.2.3


From 5b8c0174d936a6c89a6e98ceeb22b74cfc27595b Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Tue, 2 Jan 2024 17:20:02 -0500
Subject: ci: Add a NetBSD job

---
 .github/workflows/ci.yml | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ab8805b..68b8dcd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -88,7 +88,7 @@ jobs:
 
           run: |
             chown -R action:action .
-            su action -c 'gmake -j$(nproc) distcheck CC=clang16 JOBS=-j$(nproc)'
+            sudo -u action gmake -j$(nproc) distcheck CC=clang16 JOBS=-j$(nproc)
 
   openbsd:
     name: OpenBSD
@@ -119,3 +119,36 @@ jobs:
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
             doas -u action gmake -j$jobs check JOBS=-j$jobs TEST_FLAGS="--sudo=doas --verbose=skipped"
+
+  netbsd:
+    name: NetBSD
+
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run tests
+        uses: vmactions/netbsd-vm@v1
+        with:
+          release: "9.3"
+          usesh: true
+          copyback: false
+
+          prepare: |
+            PATH="/sbin:/usr/sbin:$PATH"
+            pkg_add \
+                bash \
+                clang \
+                gmake \
+                oniguruma \
+                sudo \
+                tcl-expect
+            useradd -m -G wheel -g =uid action
+            echo "%wheel ALL=(ALL) NOPASSWD: ALL" >>/usr/pkg/etc/sudoers
+
+          run: |
+            PATH="/sbin:/usr/sbin:$PATH"
+            chown -R action:action .
+            jobs=$(sysctl -n hw.ncpu)
+            sudo -u action gmake -j$jobs check CC=clang LDFLAGS="-rpath /usr/pkg/lib" JOBS=-j$jobs TEST_FLAGS="--sudo --verbose=skipped"
-- 
cgit v1.2.3


From fc4b011dc2e5ce95ade6bd6e359cf1500b898204 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Wed, 3 Jan 2024 12:33:16 -0500
Subject: ci: Add a DragonFly BSD job

---
 .github/workflows/ci.yml | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 68b8dcd..5c61dc5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -152,3 +152,34 @@ jobs:
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
             sudo -u action gmake -j$jobs check CC=clang LDFLAGS="-rpath /usr/pkg/lib" JOBS=-j$jobs TEST_FLAGS="--sudo --verbose=skipped"
+
+  dragonflybsd:
+    name: DragonFly BSD
+
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run tests
+        uses: vmactions/dragonflybsd-vm@v1
+        with:
+          release: "6.4.0"
+          usesh: true
+          copyback: false
+
+          prepare: |
+            pkg install -y \
+                bash \
+                expect \
+                gmake \
+                oniguruma \
+                sudo \
+                tcl-wrapper
+            pw useradd -n action -m -G wheel -s /usr/local/bin/bash
+            echo "%wheel ALL=(ALL) NOPASSWD: ALL" >>/usr/local/etc/sudoers
+
+          run: |
+            chown -R action:action .
+            jobs=$(sysctl -n hw.ncpu)
+            sudo -u action gmake -j$jobs check JOBS=-j$jobs TEST_FLAGS="--sudo --verbose=skipped"
-- 
cgit v1.2.3


From ae2934447147b106397829ef9a6d8cf03514240c Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Tue, 9 Jan 2024 10:51:32 -0500
Subject: ci: Add an OmniOS builder

---
 .github/workflows/ci.yml | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5c61dc5..dbf77c9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -183,3 +183,35 @@ jobs:
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
             sudo -u action gmake -j$jobs check JOBS=-j$jobs TEST_FLAGS="--sudo --verbose=skipped"
+
+  omnios:
+    name: OmniOS
+
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run tests
+        uses: vmactions/omnios-vm@v1
+        with:
+          release: "r151048"
+          usesh: true
+          copyback: false
+
+          prepare: |
+            pkg install \
+                bash \
+                build-essential \
+                expect \
+                gnu-make \
+                onig \
+                sudo
+            useradd -m -g staff action
+            echo "%staff ALL=(ALL) NOPASSWD: ALL" >>/etc/sudoers
+
+          run: |
+            PATH="/usr/xpg4/bin:$PATH"
+            chown -R action:staff .
+            jobs=$(getconf NPROCESSORS_ONLN)
+            sudo -u action gmake -j$jobs check LDFLAGS="-Wl,-rpath,/opt/ooce/lib/amd64" JOBS=-j$jobs TEST_FLAGS="--sudo --verbose=skipped"
-- 
cgit v1.2.3


From 31bede02d5dbbc8e9e60d3af9fc4a749ad89fa11 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Thu, 1 Feb 2024 12:42:57 -0500
Subject: ci/freebsd: Use the system compiler

Release builds work now on FreeBSD 14.
---
 .github/workflows/ci.yml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dbf77c9..72037e3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -79,7 +79,6 @@ jobs:
                 bash \
                 expect \
                 gmake \
-                llvm16 \
                 oniguruma \
                 sudo \
                 tcl-wrapper
@@ -88,7 +87,7 @@ jobs:
 
           run: |
             chown -R action:action .
-            sudo -u action gmake -j$(nproc) distcheck CC=clang16 JOBS=-j$(nproc)
+            sudo -u action gmake -j$(nproc) distcheck JOBS=-j$(nproc)
 
   openbsd:
     name: OpenBSD
-- 
cgit v1.2.3


From f8b22f20147d872aef9fa1037139c39e4dd0e687 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Thu, 1 Feb 2024 16:03:05 -0500
Subject: tests: Use variable redirections to dup std{out,err}

Previously, we hardcoded file descriptors 3 and 4 for duplicating
stdandard output/error respectively.  In preparation for keeping
inherited FDs open, switch to using bash's variable redirection feature
to dynamically assign FDs.

This feature is only available from bash 4.1 onwards, so this marks the
end of our support for bash 3.  macOS users will need to install a
modern bash version to run our tests.
---
 .github/workflows/ci.yml |  4 +++-
 tests/run.sh             | 26 +++++++-------------------
 tests/util.sh            | 17 ++++++++---------
 3 files changed, 18 insertions(+), 29 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 72037e3..ff0ff6f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -52,7 +52,9 @@ jobs:
 
       - name: Install dependencies
         run: |
-          brew install expect
+          brew install \
+              bash \
+              expect
 
       - name: Run tests
         run: |
diff --git a/tests/run.sh b/tests/run.sh
index 4a159f9..85d961f 100644
--- a/tests/run.sh
+++ b/tests/run.sh
@@ -28,7 +28,7 @@ debug_err() {
     callers | while read -r line func file; do
         if [ "$func" = source ]; then
             local cmd="$(awk "NR == $line" "$file" 2>/dev/null)" || :
-            debug "$file" $line "${RED}error $ret${RST}" "$cmd" >&4
+            debug "$file" $line "${RED}error $ret${RST}" "$cmd" >&$DUPERR
             break
         fi
     done
@@ -73,21 +73,9 @@ bg_test() {
     return $ret
 }
 
-# Wait for any background job to complete
-if ((BASH_VERSINFO[0] > 4 || (BASH_VERSINFO[0] == 4 && BASH_VERSINFO[1] >= 3))); then
-    wait_any() {
-        wait -n
-    }
-else
-    wait_any() {
-        read -ra jobs < <(jobs -p)
-        wait ${jobs[0]}
-    }
-fi
-
 # Wait for a background test to finish
 wait_test() {
-    wait_any
+    wait -n
     ret=$?
     ((BG--))
 
@@ -197,7 +185,7 @@ skip() {
         caller | {
             read -r line file
             printf "${BOL}"
-            debug "$file" $line "" "$(awk "NR == $line" "$file")" >&3
+            debug "$file" $line "" "$(awk "NR == $line" "$file")" >&$DUPOUT
         }
     fi
 
@@ -252,8 +240,8 @@ bfs_verbose() {
         (
             # Close some fds to make room for the pipe,
             # even with extremely low ulimit -n
-            exec >&- 4>&-
-            exec >&3 3>&-
+            exec >&- {DUPERR}>&-
+            exec >&$DUPOUT {DUPOUT}>&-
             color bfs_verbose_impl "$@"
         )
     fi
@@ -306,7 +294,7 @@ invoke_bfs() {
 
     local ret=0
     # Close the logging fds
-    "${BFS[@]}" "$@" 3>&- 4>&- || ret=$?
+    "${BFS[@]}" "$@" {DUPOUT}>&- {DUPERR}>&- || ret=$?
 
     # Allow bfs to fail, but not crash
     if ((ret > 125)); then
@@ -391,7 +379,7 @@ diff_output() {
     if ((UPDATE)); then
         cp "$OUT" "$GOLD"
     else
-        $DIFF -u "$GOLD" "$OUT" >&4
+        $DIFF -u "$GOLD" "$OUT" >&$DUPERR
     fi
 }
 
diff --git a/tests/util.sh b/tests/util.sh
index 5bd3328..686cc77 100644
--- a/tests/util.sh
+++ b/tests/util.sh
@@ -68,7 +68,7 @@ stdenv() {
 
     # Close stdin so bfs doesn't think we're interactive
     # dup() the standard fds for logging even when redirected
-    exec &1 4>&2
+    exec &1 {DUPERR}>&2
 }
 
 # Drop root priviliges or bail
@@ -159,19 +159,18 @@ defer() {
 
 # Pop a single command from the defer stack and run it
 pop_defer() {
-    local i=$((${#DEFER_CMDS[@]} - 1))
-    local cmd="${DEFER_CMDS[$i]}"
-    local file="${DEFER_FILES[$i]}"
-    local line="${DEFER_LINES[$i]}"
-    unset "DEFER_CMDS[$i]"
-    unset "DEFER_FILES[$i]"
-    unset "DEFER_LINES[$i]"
+    local cmd="${DEFER_CMDS[-1]}"
+    local file="${DEFER_FILES[-1]}"
+    local line="${DEFER_LINES[-1]}"
+    unset "DEFER_CMDS[-1]"
+    unset "DEFER_FILES[-1]"
+    unset "DEFER_LINES[-1]"
 
     local ret=0
     eval "$cmd" || ret=$?
 
     if ((ret != 0)); then
-        debug "$file" $line "${RED}error $ret${RST}" "defer $cmd" >&4
+        debug "$file" $line "${RED}error $ret${RST}" "defer $cmd" >&$DUPERR
     fi
 
     return $ret
-- 
cgit v1.2.3


From c4334184502c25a41b5cab060681229b2b570c0a Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Thu, 1 Feb 2024 16:14:19 -0500
Subject: tests: Don't clobber inherited FDs

Rather than attempting to close any unexpected FDs, just count them and
adjust our ulimit -n calls to account for them.
---
 .github/workflows/ci.yml       |  1 +
 tests/bfs/deep_strict.sh       |  2 +-
 tests/common/execdir_ulimit.sh |  2 +-
 tests/gnu/execdir_ulimit.out   | 32 ++++++++++++++++----------------
 tests/gnu/execdir_ulimit.sh    |  2 +-
 tests/gnu/printf_u_g_ulimit.sh |  2 +-
 tests/posix/deep.sh            |  2 +-
 tests/posix/exec_ulimit.out    | 32 ++++++++++++++++----------------
 tests/posix/exec_ulimit.sh     |  2 +-
 tests/posix/nogroup_ulimit.sh  |  2 +-
 tests/posix/nouser_ulimit.sh   |  2 +-
 tests/util.sh                  | 17 +++++------------
 12 files changed, 46 insertions(+), 52 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ff0ff6f..8e96526 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -86,6 +86,7 @@ jobs:
                 tcl-wrapper
             pw useradd -n action -m -G wheel -s /usr/local/bin/bash
             echo "%wheel ALL=(ALL) NOPASSWD: ALL" >>/usr/local/etc/sudoers
+            mount -t fdescfs none /dev/fd
 
           run: |
             chown -R action:action .
diff --git a/tests/bfs/deep_strict.sh b/tests/bfs/deep_strict.sh
index 50c8f05..22453c0 100644
--- a/tests/bfs/deep_strict.sh
+++ b/tests/bfs/deep_strict.sh
@@ -1,3 +1,3 @@
 # Not even enough fds to keep the root open
-ulimit -n 7
+ulimit -n $((NOPENFD + 4))
 bfs_diff deep -type f -exec bash -c 'echo "${1:0:6}/.../${1##*/} (${#1})"' bash {} \;
diff --git a/tests/common/execdir_ulimit.sh b/tests/common/execdir_ulimit.sh
index 90c93c1..122c282 100644
--- a/tests/common/execdir_ulimit.sh
+++ b/tests/common/execdir_ulimit.sh
@@ -2,5 +2,5 @@ cd "$TEST"
 mkdir -p a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z
 mkdir -p a/b/c/d/e/f/g/h/i/j/k/l/m/0/1/2/3/4/5/6/7/8/9/A/B/C
 
-ulimit -n 13
+ulimit -n $((NOPENFD + 10))
 bfs_diff . -execdir echo {} \;
diff --git a/tests/gnu/execdir_ulimit.out b/tests/gnu/execdir_ulimit.out
index 7931f9a..6749f7d 100644
--- a/tests/gnu/execdir_ulimit.out
+++ b/tests/gnu/execdir_ulimit.out
@@ -1,16 +1,16 @@
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 ./0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
diff --git a/tests/gnu/execdir_ulimit.sh b/tests/gnu/execdir_ulimit.sh
index 3245dad..e14e716 100644
--- a/tests/gnu/execdir_ulimit.sh
+++ b/tests/gnu/execdir_ulimit.sh
@@ -1,2 +1,2 @@
-ulimit -Sn 16
+ulimit -Sn 64
 bfs_diff deep -type f -execdir bash -c 'printf "%d %s\n" $(ulimit -Sn) "$1"' bash {} \;
diff --git a/tests/gnu/printf_u_g_ulimit.sh b/tests/gnu/printf_u_g_ulimit.sh
index 390ad48..c621b9b 100644
--- a/tests/gnu/printf_u_g_ulimit.sh
+++ b/tests/gnu/printf_u_g_ulimit.sh
@@ -1,2 +1,2 @@
-ulimit -n 16
+ulimit -n $((NOPENFD + 13))
 [ "$(invoke_bfs deep -printf '%u %g\n' | uniq)" = "$(id -un) $(id -gn)" ]
diff --git a/tests/posix/deep.sh b/tests/posix/deep.sh
index 431705e..36a88c0 100644
--- a/tests/posix/deep.sh
+++ b/tests/posix/deep.sh
@@ -1,2 +1,2 @@
-ulimit -n 16
+ulimit -n $((NOPENFD + 13))
 bfs_diff deep -type f -exec bash -c 'echo "${1:0:6}/.../${1##*/} (${#1})"' bash {} \;
diff --git a/tests/posix/exec_ulimit.out b/tests/posix/exec_ulimit.out
index 587ece2..144169e 100644
--- a/tests/posix/exec_ulimit.out
+++ b/tests/posix/exec_ulimit.out
@@ -1,16 +1,16 @@
-16 deep/0/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/1/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/2/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/3/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/4/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/5/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/6/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/7/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/8/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/9/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/A/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/B/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/C/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/D/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/E/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
-16 deep/F/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/0/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/1/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/2/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/3/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/4/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/5/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/6/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/7/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/8/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/9/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/A/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/B/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/C/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/D/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/E/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
+64 deep/F/.../0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDE
diff --git a/tests/posix/exec_ulimit.sh b/tests/posix/exec_ulimit.sh
index 8ac8ff1..655fbec 100644
--- a/tests/posix/exec_ulimit.sh
+++ b/tests/posix/exec_ulimit.sh
@@ -1,2 +1,2 @@
-ulimit -Sn 16
+ulimit -Sn 64
 bfs_diff deep -type f -exec bash -c 'printf "%d %s\n" $(ulimit -Sn) "${1:0:6}/.../${1##*/}"' bash {} \;
diff --git a/tests/posix/nogroup_ulimit.sh b/tests/posix/nogroup_ulimit.sh
index 5b4c440..a39dd1f 100644
--- a/tests/posix/nogroup_ulimit.sh
+++ b/tests/posix/nogroup_ulimit.sh
@@ -1,2 +1,2 @@
-ulimit -n 16
+ulimit -n $((NOPENFD + 13))
 bfs_diff deep -type f -nogroup
diff --git a/tests/posix/nouser_ulimit.sh b/tests/posix/nouser_ulimit.sh
index e1400f0..a94b8c5 100644
--- a/tests/posix/nouser_ulimit.sh
+++ b/tests/posix/nouser_ulimit.sh
@@ -1,2 +1,2 @@
-ulimit -n 16
+ulimit -n $((NOPENFD + 13))
 bfs_diff deep -type f -nouser
diff --git a/tests/util.sh b/tests/util.sh
index 686cc77..ec24958 100644
--- a/tests/util.sh
+++ b/tests/util.sh
@@ -48,23 +48,16 @@ stdenv() {
         export MallocNanoZone=0
     fi
 
-    # Close non-standard inherited fds
+    # Count the inherited FDs
     if [ -d /proc/self/fd ]; then
         local fds=/proc/self/fd
     else
         local fds=/dev/fd
     fi
-
-    for fd in "$fds"/*; do
-        if [ ! -e "$fd" ]; then
-            continue
-        fi
-
-        local fd="${fd##*/}"
-        if ((fd > 2)); then
-            eval "exec ${fd}<&-"
-        fi
-    done
+    # We use ls $fds on purpose, rather than e.g. ($fds/*), to avoid counting
+    # internal bash fds that are not exposed to spawned processes
+    NOPENFD=$(ls -1q "$fds/" 2>/dev/null | wc -l)
+    NOPENFD=$((NOPENFD > 3 ? NOPENFD - 1 : 3))
 
     # Close stdin so bfs doesn't think we're interactive
     # dup() the standard fds for logging even when redirected
-- 
cgit v1.2.3


From 4d0d84f935159c395ccf3b95d5727a3553003b68 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Thu, 1 Feb 2024 12:11:41 -0500
Subject: tests: Implement jobserver inheritance

---
 .github/workflows/ci.yml |  12 ++---
 GNUmakefile              |   7 +--
 tests/getopts.sh         |  22 ++++++---
 tests/run.sh             | 119 +++++++++++++++++++++++++++++++++++++----------
 tests/tests.mk           |   7 +++
 tests/util.sh            |  12 +++--
 6 files changed, 132 insertions(+), 47 deletions(-)
 create mode 100644 tests/tests.mk

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8e96526..5ca0a75 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -59,7 +59,7 @@ jobs:
       - name: Run tests
         run: |
           jobs=$(sysctl -n hw.ncpu)
-          make -j$jobs distcheck JOBS=-j$jobs
+          make -j$jobs distcheck
 
   freebsd:
     name: FreeBSD
@@ -90,7 +90,7 @@ jobs:
 
           run: |
             chown -R action:action .
-            sudo -u action gmake -j$(nproc) distcheck JOBS=-j$(nproc)
+            sudo -u action gmake -j$(nproc) distcheck
 
   openbsd:
     name: OpenBSD
@@ -120,7 +120,7 @@ jobs:
           run: |
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
-            doas -u action gmake -j$jobs check JOBS=-j$jobs TEST_FLAGS="--sudo=doas --verbose=skipped"
+            doas -u action gmake -j$jobs check TEST_FLAGS="--sudo=doas --verbose=skipped"
 
   netbsd:
     name: NetBSD
@@ -153,7 +153,7 @@ jobs:
             PATH="/sbin:/usr/sbin:$PATH"
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
-            sudo -u action gmake -j$jobs check CC=clang LDFLAGS="-rpath /usr/pkg/lib" JOBS=-j$jobs TEST_FLAGS="--sudo --verbose=skipped"
+            sudo -u action gmake -j$jobs check CC=clang LDFLAGS="-rpath /usr/pkg/lib" TEST_FLAGS="--sudo --verbose=skipped"
 
   dragonflybsd:
     name: DragonFly BSD
@@ -184,7 +184,7 @@ jobs:
           run: |
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
-            sudo -u action gmake -j$jobs check JOBS=-j$jobs TEST_FLAGS="--sudo --verbose=skipped"
+            sudo -u action gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
   omnios:
     name: OmniOS
@@ -216,4 +216,4 @@ jobs:
             PATH="/usr/xpg4/bin:$PATH"
             chown -R action:staff .
             jobs=$(getconf NPROCESSORS_ONLN)
-            sudo -u action gmake -j$jobs check LDFLAGS="-Wl,-rpath,/opt/ooce/lib/amd64" JOBS=-j$jobs TEST_FLAGS="--sudo --verbose=skipped"
+            sudo -u action gmake -j$jobs check LDFLAGS="-Wl,-rpath,/opt/ooce/lib/amd64" TEST_FLAGS="--sudo --verbose=skipped"
diff --git a/GNUmakefile b/GNUmakefile
index 34c7f37..e01e93a 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -304,13 +304,8 @@ check: $(CHECKS)
 check-units: $(BIN)/tests/units
 	$<
 
-JOBS := $(filter -j%,$(MAKEFLAGS))
-ifndef JOBS
-	JOBS := -j1
-endif
-
 $(STRATEGY_CHECKS): check-%: $(BIN)/bfs $(TEST_UTILS)
-	./tests/tests.sh $(JOBS) --bfs="$(BIN)/bfs -S $*" $(TEST_FLAGS)
+	+./tests/tests.sh --make="$(MAKE)" --bfs="$(BIN)/bfs -S $*" $(TEST_FLAGS)
 
 # Custom test flags for distcheck
 DISTCHECK_FLAGS := -s TEST_FLAGS="--sudo --verbose=skipped"
diff --git a/tests/getopts.sh b/tests/getopts.sh
index ac75140..5214e9f 100644
--- a/tests/getopts.sh
+++ b/tests/getopts.sh
@@ -10,6 +10,7 @@ if command -v nproc &>/dev/null; then
 else
     JOBS=1
 fi
+MAKE=
 PATTERNS=()
 SUDO=()
 STOP=0
@@ -24,15 +25,19 @@ VERBOSE_TESTS=0
 usage() {
     local pad=$(printf "%*s" ${#0} "")
     color cat </dev/null)" || :
-            debug "$file" $line "${RED}error $ret${RST}" "$cmd" >&$DUPERR
+            debug "$file" $line "${RED}error $ret${RST}" >&$DUPERR
             break
         fi
     done
 }
 
-# Run a single test
-run_test() (
+# Source a test
+source_test() (
     set -eE
     trap debug_err ERR
+
+    if ((${#MAKE[@]})); then
+        # Close the jobserver pipes
+        exec {READY_PIPE}<&- {DONE_PIPE}>&-
+    fi
+
     cd "$TMP"
     source "$@"
 )
 
-# Run a test in the background
-bg_test() {
+# Run a test
+run_test() {
     if ((VERBOSE_ERRORS)); then
-        run_test "$1"
+        source_test "$1"
     else
-        run_test "$1" 2>"$TMP/$TEST.err"
+        source_test "$1" 2>"$TMP/$TEST.err"
     fi
     ret=$?
 
+    if ((${#MAKE[@]})); then
+        # Write one byte to the done pipe
+        printf . >&$DONE_PIPE
+    fi
+
     case $ret in
         0)
             if ((VERBOSE_TESTS)); then
@@ -73,28 +83,87 @@ bg_test() {
     return $ret
 }
 
-# Wait for a background test to finish
-wait_test() {
-    wait -n
-    ret=$?
+# Count the tests running in the background
+BG=0
+
+# Run a test in the background
+bg_test() {
+    run_test "$1" &
+    ((++BG))
+}
+
+# Reap a finished background test
+reap_test() {
     ((BG--))
 
-    case $ret in
+    case "$1" in
         0)
             ((++passed))
-            return 0
             ;;
         $EX_SKIP)
             ((++skipped))
-            return 0
             ;;
         *)
             ((++failed))
-            return $ret
             ;;
     esac
 }
 
+# Wait for a background test to finish
+wait_test() {
+    local pid
+    wait -n -ppid
+    ret=$?
+    if [ -z "${pid:-}" ]; then
+        debug "${BASH_SOURCE[0]}" $((LINENO - 3)) "${RED}error $ret${RST}" >&$DUPERR
+        exit 1
+    fi
+
+    reap_test $ret
+}
+
+# Wait until we're ready to run another test
+wait_ready() {
+    if ((${#MAKE[@]})); then
+        # We'd like to parse the output of jobs -n, but we can't run it in a
+        # subshell or we won't get the right output
+        jobs -n >"$TMP/jobs"
+        while read -r job status ret foo; do
+            case "$status" in
+                Done)
+                    reap_test 0
+                    ;;
+                Exit)
+                    reap_test $ret
+                    ;;
+            esac
+        done <"$TMP/jobs"
+
+        # Read one byte from the ready pipe
+        read -r -N1 -u$READY_PIPE
+    elif ((BG >= JOBS)); then
+        wait_test
+    fi
+}
+
+# Run make as a co-process to use its job control
+comake() {
+    coproc {
+        # We can't just use std{in,out}, due to
+        # https://www.gnu.org/software/make/manual/html_node/Parallel-Input.html
+        exec {DONE_PIPE}<&0 {READY_PIPE}>&1
+        exec "${MAKE[@]}" -s \
+             -f "$TESTS/tests.mk" \
+             DONE=$DONE_PIPE \
+             READY=$READY_PIPE \
+             "${TEST_CASES[@]/#/tests/}" \
+             /dev/null
+    }
+
+    # coproc pipes aren't inherited by subshells, so dup them
+    exec {READY_PIPE}<&${COPROC[0]} {DONE_PIPE}>&${COPROC[1]}
+}
+
 # Run all the tests
 run_tests() {
     if ((VERBOSE_TESTS)); then
@@ -125,17 +194,17 @@ run_tests() {
         TEST_FMT="."
     fi
 
-    BG=0
+    if ((${#MAKE[@]})); then
+        comake
+    fi
 
     # Turn off set -e (but turn it back on in run_test)
     set +e
 
     for TEST in "${TEST_CASES[@]}"; do
-        if ((BG >= JOBS)); then
-            wait_test
-            if (($? && STOP)); then
-                break
-            fi
+        wait_ready
+        if (($? && STOP)); then
+            break
         fi
 
         percent=$((100 * ran / total))
@@ -144,8 +213,8 @@ run_tests() {
         mkdir -p "$TMP/$TEST"
         OUT="$TMP/$TEST.out"
 
-        bg_test "$TESTS/$TEST.sh" &
-        ((++BG, ++ran))
+        bg_test "$TESTS/$TEST.sh"
+        ((++ran))
     done
 
     while ((BG > 0)); do
@@ -185,7 +254,7 @@ skip() {
         caller | {
             read -r line file
             printf "${BOL}"
-            debug "$file" $line "" "$(awk "NR == $line" "$file")" >&$DUPOUT
+            debug "$file" $line "" >&$DUPOUT
         }
     fi
 
diff --git a/tests/tests.mk b/tests/tests.mk
new file mode 100644
index 0000000..5bf4f6c
--- /dev/null
+++ b/tests/tests.mk
@@ -0,0 +1,7 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# GNU makefile that exposes make's job control to tests.sh
+
+tests/%:
+	bash -c 'printf . >&$(READY) && read -r -N1 -u$(DONE)'
diff --git a/tests/util.sh b/tests/util.sh
index ec24958..7dba9fb 100644
--- a/tests/util.sh
+++ b/tests/util.sh
@@ -113,9 +113,13 @@ callers() {
 
 # Print a message including path, line number, and command
 debug() {
-    local file="${1/#*\/tests\//tests/}"
-    set -- "$file" "${@:2}"
-    color printf "${BLD}%s:%d:${RST} %s\n    %s\n" "$@"
+    local file="$1"
+    local line="$2"
+    local msg="$3"
+    local cmd="$(awk "NR == $line" "$file" 2>/dev/null)" || :
+    file="${file/#*\/tests\//tests/}"
+
+    color printf "${BLD}%s:%d:${RST} %s\n    %s\n" "$file" "$line" "$msg" "$cmd"
 }
 
 ## Deferred cleanup
@@ -163,7 +167,7 @@ pop_defer() {
     eval "$cmd" || ret=$?
 
     if ((ret != 0)); then
-        debug "$file" $line "${RED}error $ret${RST}" "defer $cmd" >&$DUPERR
+        debug "$file" $line "${RED}error $ret${RST}" >&$DUPERR
     fi
 
     return $ret
-- 
cgit v1.2.3


From 8c7040e03a1cabf4b9dffad7c99633819e50ea5b Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Sat, 3 Feb 2024 15:28:02 -0500
Subject: ci/macos: Try the new M1 runner

---
 .github/workflows/ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5ca0a75..6276627 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,7 +45,7 @@ jobs:
   macos:
     name: macOS
 
-    runs-on: macos-13
+    runs-on: macos-14
 
     steps:
       - uses: actions/checkout@v4
-- 
cgit v1.2.3


From 906009bbb7a88002d0db8b7a26ad9d5b71120869 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Tue, 19 Mar 2024 15:58:37 -0400
Subject: ci: Work around https://github.com/actions/runner-images/issues/9491

Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113430
Link: https://github.com/llvm/llvm-project/issues/78354
Link: https://zolutal.github.io/aslrnt/
---
 .github/workflows/ci.yml | 2 ++
 1 file changed, 2 insertions(+)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6276627..4c1c89c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,6 +37,8 @@ jobs:
           sudo ln -s libattr.so.1 /lib/i386-linux-gnu/libattr.so
           sudo ln -s libcap.so.2 /lib/i386-linux-gnu/libcap.so
           sudo ln -s libonig.so.5 /lib/i386-linux-gnu/libonig.so
+          # Work around https://github.com/actions/runner-images/issues/9491
+          sudo sysctl vm.mmap_rnd_bits=28
 
       - name: Run tests
         run: |
-- 
cgit v1.2.3


From 1109843d017e0320f0d18bfc398e27ff25592dfb Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Thu, 4 Apr 2024 15:17:38 -0400
Subject: build: Don't use libattr

We only rely on interfaces like listxattr() which are provided by the C
library itself.
---
 .github/workflows/ci.yml      | 3 ---
 .github/workflows/codecov.yml | 1 -
 .github/workflows/codeql.yml  | 1 -
 GNUmakefile                   | 7 -------
 README.md                     | 6 +++---
 docs/BUILDING.md              | 4 +---
 6 files changed, 4 insertions(+), 18 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4c1c89c..8e688fe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,8 +23,6 @@ jobs:
               libacl1-dev \
               libacl1:i386 \
               attr \
-              libattr1-dev \
-              libattr1:i386 \
               libcap2-bin \
               libcap-dev \
               libcap2:i386 \
@@ -34,7 +32,6 @@ jobs:
           # Ubuntu doesn't let you install the -dev packages for both amd64 and
           # i386 at once, so we make our own symlinks to fix -m32 -lacl -l...
           sudo ln -s libacl.so.1 /lib/i386-linux-gnu/libacl.so
-          sudo ln -s libattr.so.1 /lib/i386-linux-gnu/libattr.so
           sudo ln -s libcap.so.2 /lib/i386-linux-gnu/libcap.so
           sudo ln -s libonig.so.5 /lib/i386-linux-gnu/libonig.so
           # Work around https://github.com/actions/runner-images/issues/9491
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index 9c2119b..d1dc351 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -18,7 +18,6 @@ jobs:
               acl \
               libacl1-dev \
               attr \
-              libattr1-dev \
               libcap2-bin \
               libcap-dev \
               libonig-dev \
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 71073c6..c50b266 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -34,7 +34,6 @@ jobs:
               acl \
               libacl1-dev \
               attr \
-              libattr1-dev \
               libcap2-bin \
               libcap-dev \
               libonig-dev \
diff --git a/GNUmakefile b/GNUmakefile
index 080fb17..8685ca3 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -125,7 +125,6 @@ endif # USE_ONIGURUMA
 ifeq ($(OS),Linux)
 ifndef NOLIBS
 USE_ACL := y
-USE_ATTR := y
 USE_LIBCAP := y
 USE_LIBURING := y
 endif
@@ -136,12 +135,6 @@ else
 LOCAL_CPPFLAGS += -DBFS_USE_SYS_ACL_H=0
 endif
 
-ifdef USE_ATTR
-LOCAL_LDLIBS += -lattr
-else
-LOCAL_CPPFLAGS += -DBFS_USE_SYS_XATTR_H=0
-endif
-
 ifdef USE_LIBCAP
 LOCAL_LDLIBS += -lcap
 else
diff --git a/README.md b/README.md
index 9992938..17226fd 100644
--- a/README.md
+++ b/README.md
@@ -293,7 +293,7 @@ Here's how to install them on some common platforms:
 
 
 Alpine Linux
-# apk add acl{,-dev} attr{,-dev} libcap{,-dev} liburing-dev oniguruma-dev
+# apk add acl{,-dev} attr libcap{,-dev} liburing-dev oniguruma-dev
 
 Arch Linux
 # pacman -S acl attr libcap liburing oniguruma
@@ -302,13 +302,13 @@ Here's how to install them on some common platforms:
 # apt install acl libacl1-dev attr libattr1-dev libcap2-bin libcap-dev liburing-dev libonig-dev
 
 Fedora
-# dnf install acl libacl-devel libattr-devel libcap-devel liburing-devel oniguruma-devel
+# dnf install acl libacl-devel attr libcap-devel liburing-devel oniguruma-devel
 
 NixOS
 # nix-env -i acl attr libcap liburing oniguruma
 
 Void Linux
-# xbps-install -S acl-{devel,progs} attr-{devel,progs} libcap-{devel,progs} liburing-devel oniguruma-devel
+# xbps-install -S acl-{devel,progs} attr-progs libcap-{devel,progs} liburing-devel oniguruma-devel
 
 Homebrew
 $ brew install oniguruma
diff --git a/docs/BUILDING.md b/docs/BUILDING.md
index 02f9756..7eb3a37 100644
--- a/docs/BUILDING.md
+++ b/docs/BUILDING.md
@@ -56,7 +56,7 @@ Here are some of the common ones; check the [`GNUmakefile`](/GNUmakefile) for mo
 | `CC`                             | The C compiler to use, e.g. `make CC=clang` |
 | `CFLAGS`
`EXTRA_CFLAGS`       | Override/add to the default compiler flags  |
 | `LDFLAGS`
`EXTRA_LDFLAGS`     | Override/add to the linker flags            |
-| `USE_ACL`
`USE_ATTR`
...   | Enable/disable [optional dependencies]      |
+| `USE_ACL`
`USE_LIBCAP`
... | Enable/disable [optional dependencies]      |
 | `TEST_FLAGS`                     | `tests.sh` flags for `make check`           |
 | `BUILDDIR`                       | The build output directory (default: `.`)   |
 | `DESTDIR`                        | The root directory for `make install`       |
@@ -73,13 +73,11 @@ These dependencies are optional, and can be turned off at build time if necessar
 | Dependency  | Platforms  | `make` flag     |
 |-------------|------------|-----------------|
 | [acl]       | Linux only | `USE_ACL`       |
-| [attr]      | Linux only | `USE_ATTR`      |
 | [libcap]    | Linux only | `USE_LIBCAP`    |
 | [liburing]  | Linux only | `USE_LIBURING`  |
 | [Oniguruma] | All        | `USE_ONIGURUMA` |
 
 [acl]: https://savannah.nongnu.org/projects/acl
-[attr]: https://savannah.nongnu.org/projects/attr
 [libcap]: https://sites.google.com/site/fullycapable/
 [liburing]: https://github.com/axboe/liburing
 [Oniguruma]: https://github.com/kkos/oniguruma
-- 
cgit v1.2.3


From 5e0b721d0d929223e4308406480a1f1ca9e3f4dc Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Tue, 9 Apr 2024 16:36:48 -0400
Subject: ci: Update {Net,Open}BSD

---
 .github/workflows/ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8e688fe..51d06fb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -102,7 +102,7 @@ jobs:
       - name: Run tests
         uses: vmactions/openbsd-vm@v1
         with:
-          release: "7.4"
+          release: "7.5"
           usesh: true
           copyback: false
 
@@ -132,7 +132,7 @@ jobs:
       - name: Run tests
         uses: vmactions/netbsd-vm@v1
         with:
-          release: "9.3"
+          release: "10.0"
           usesh: true
           copyback: false
 
-- 
cgit v1.2.3


From c31577d102d87455f3f12086be4c0e2159fa5d35 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Mon, 8 Apr 2024 11:27:11 -0400
Subject: build: Add a separate configuration step

---
 .github/workflows/ci.yml      |  23 +-
 .github/workflows/codecov.yml |   3 +-
 .github/workflows/codeql.yml  |   1 +
 .gitignore                    |   2 +
 GNUmakefile                   | 372 ------------------------------
 Makefile                      | 517 ++++++++++++++++++++++++++++++++++++++++++
 README.md                     |   4 +-
 config/cc.sh                  |  12 +
 config/empty.c                |   6 +
 config/libacl.c               |   6 +
 config/libcap.c               |   6 +
 config/liburing.c             |   6 +
 config/oniguruma.c            |   6 +
 config/pkg.sh                 |  44 ++++
 config/pkgconf.sh             |  64 ++++++
 docs/BUILDING.md              |  83 +++----
 docs/USAGE.md                 |   2 +-
 src/config.h                  |  11 +-
 src/main.c                    |   1 +
 src/parse.c                   |   2 +-
 src/version.c                 |   6 +
 tests/run.sh                  |   2 +-
 tests/tests.mk                |  10 +-
 23 files changed, 757 insertions(+), 432 deletions(-)
 delete mode 100644 GNUmakefile
 create mode 100644 Makefile
 create mode 100755 config/cc.sh
 create mode 100644 config/empty.c
 create mode 100644 config/libacl.c
 create mode 100644 config/libcap.c
 create mode 100644 config/liburing.c
 create mode 100644 config/oniguruma.c
 create mode 100755 config/pkg.sh
 create mode 100755 config/pkgconf.sh
 create mode 100644 src/version.c

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 51d06fb..78aa196 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,12 +53,13 @@ jobs:
         run: |
           brew install \
               bash \
-              expect
+              expect \
+              make
 
       - name: Run tests
         run: |
           jobs=$(sysctl -n hw.ncpu)
-          make -j$jobs distcheck
+          gmake -j$jobs distcheck
 
   freebsd:
     name: FreeBSD
@@ -79,8 +80,8 @@ jobs:
             pkg install -y \
                 bash \
                 expect \
-                gmake \
                 oniguruma \
+                pkgconf \
                 sudo \
                 tcl-wrapper
             pw useradd -n action -m -G wheel -s /usr/local/bin/bash
@@ -89,7 +90,7 @@ jobs:
 
           run: |
             chown -R action:action .
-            sudo -u action gmake -j$(nproc) distcheck
+            sudo -u action make -j$(nproc) distcheck
 
   openbsd:
     name: OpenBSD
@@ -119,6 +120,7 @@ jobs:
           run: |
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
+            doas -u action gmake config
             doas -u action gmake -j$jobs check TEST_FLAGS="--sudo=doas --verbose=skipped"
 
   netbsd:
@@ -141,8 +143,8 @@ jobs:
             pkg_add \
                 bash \
                 clang \
-                gmake \
                 oniguruma \
+                pkgconf \
                 sudo \
                 tcl-expect
             useradd -m -G wheel -g =uid action
@@ -152,7 +154,8 @@ jobs:
             PATH="/sbin:/usr/sbin:$PATH"
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
-            sudo -u action gmake -j$jobs check CC=clang LDFLAGS="-rpath /usr/pkg/lib" TEST_FLAGS="--sudo --verbose=skipped"
+            sudo -u action make config CC=clang
+            sudo -u action make -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
   dragonflybsd:
     name: DragonFly BSD
@@ -173,8 +176,8 @@ jobs:
             pkg install -y \
                 bash \
                 expect \
-                gmake \
                 oniguruma \
+                pkgconf \
                 sudo \
                 tcl-wrapper
             pw useradd -n action -m -G wheel -s /usr/local/bin/bash
@@ -183,7 +186,8 @@ jobs:
           run: |
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
-            sudo -u action gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
+            sudo -u action make config
+            sudo -u action make -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
   omnios:
     name: OmniOS
@@ -215,4 +219,5 @@ jobs:
             PATH="/usr/xpg4/bin:$PATH"
             chown -R action:staff .
             jobs=$(getconf NPROCESSORS_ONLN)
-            sudo -u action gmake -j$jobs check LDFLAGS="-Wl,-rpath,/opt/ooce/lib/amd64" TEST_FLAGS="--sudo --verbose=skipped"
+            sudo -u action gmake config
+            sudo -u action gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index d1dc351..2abe531 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -25,7 +25,8 @@ jobs:
 
       - name: Generate coverage
         run: |
-          make -j$(nproc) gcov check TEST_FLAGS="--sudo"
+          make config GCOV=y
+          make -j$(nproc) check TEST_FLAGS="--sudo"
           gcov -abcfpu obj/*/*.o
 
       - uses: codecov/codecov-action@v3
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index c50b266..a2c224a 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -47,6 +47,7 @@ jobs:
 
       - name: Build
         run: |
+          make config
           make -j$(nproc) all
 
       - name: Perform CodeQL Analysis
diff --git a/.gitignore b/.gitignore
index 4ded7c4..84e47fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 /bin/
+/gen/
 /obj/
+/distcheck-*/
diff --git a/GNUmakefile b/GNUmakefile
deleted file mode 100644
index 8685ca3..0000000
--- a/GNUmakefile
+++ /dev/null
@@ -1,372 +0,0 @@
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-ifneq ($(wildcard .git),)
-VERSION := $(shell git describe --always 2>/dev/null)
-endif
-
-ifndef VERSION
-VERSION := 3.1.3
-endif
-
-ifndef OS
-OS := $(shell uname)
-endif
-
-ifndef ARCH
-ARCH := $(shell uname -m)
-endif
-
-CC ?= gcc
-INSTALL ?= install
-MKDIR ?= mkdir -p
-RM ?= rm -f
-
-export BUILDDIR ?= .
-DESTDIR ?=
-PREFIX ?= /usr
-MANDIR ?= $(PREFIX)/share/man
-
-BIN := $(BUILDDIR)/bin
-OBJ := $(BUILDDIR)/obj
-
-DEFAULT_CFLAGS := \
-    -g \
-    -Wall \
-    -Wformat=2 \
-    -Werror=implicit \
-    -Wimplicit-fallthrough \
-    -Wmissing-declarations \
-    -Wshadow \
-    -Wsign-compare \
-    -Wstrict-prototypes
-
-CFLAGS ?= $(DEFAULT_CFLAGS)
-LDFLAGS ?=
-DEPFLAGS ?= -MD -MP -MF $(@:.o=.d)
-
-LOCAL_CPPFLAGS := \
-    -D__EXTENSIONS__ \
-    -D_ATFILE_SOURCE \
-    -D_BSD_SOURCE \
-    -D_DARWIN_C_SOURCE \
-    -D_DEFAULT_SOURCE \
-    -D_GNU_SOURCE \
-    -D_LARGEFILE64_SOURCE \
-    -D_POSIX_PTHREAD_SEMANTICS \
-    -D_FILE_OFFSET_BITS=64 \
-    -D_TIME_BITS=64 \
-    -DBFS_VERSION=\"$(VERSION)\"
-
-LOCAL_CFLAGS := -std=c17 -pthread
-LOCAL_LDFLAGS :=
-LOCAL_LDLIBS :=
-
-ASAN := $(filter asan,$(MAKECMDGOALS))
-LSAN := $(filter lsan,$(MAKECMDGOALS))
-MSAN := $(filter msan,$(MAKECMDGOALS))
-TSAN := $(filter tsan,$(MAKECMDGOALS))
-UBSAN := $(filter ubsan,$(MAKECMDGOALS))
-
-ifdef ASAN
-LOCAL_CFLAGS += -fsanitize=address
-SANITIZE := y
-endif
-
-ifdef LSAN
-LOCAL_CFLAGS += -fsanitize=leak
-SANITIZE := y
-endif
-
-ifdef MSAN
-# msan needs all code instrumented
-NOLIBS := y
-LOCAL_CFLAGS += -fsanitize=memory -fsanitize-memory-track-origins
-SANITIZE := y
-endif
-
-ifdef TSAN
-# tsan needs all code instrumented
-NOLIBS := y
-# https://github.com/google/sanitizers/issues/342
-LOCAL_CPPFLAGS += -DBFS_USE_TARGET_CLONES=0
-LOCAL_CFLAGS += -fsanitize=thread
-SANITIZE := y
-endif
-
-ifdef UBSAN
-LOCAL_CFLAGS += -fsanitize=undefined
-SANITIZE := y
-endif
-
-ifdef SANITIZE
-LOCAL_CFLAGS += -fno-sanitize-recover=all
-endif
-
-ifndef NOLIBS
-USE_ONIGURUMA := y
-endif
-
-ifdef USE_ONIGURUMA
-LOCAL_CPPFLAGS += -DBFS_USE_ONIGURUMA=1
-
-ONIG_CONFIG := $(shell command -v onig-config 2>/dev/null)
-ifdef ONIG_CONFIG
-ONIG_CFLAGS := $(shell $(ONIG_CONFIG) --cflags)
-ONIG_LDLIBS := $(shell $(ONIG_CONFIG) --libs)
-else
-ONIG_LDLIBS := -lonig
-endif
-
-LOCAL_CFLAGS += $(ONIG_CFLAGS)
-LOCAL_LDLIBS += $(ONIG_LDLIBS)
-endif # USE_ONIGURUMA
-
-ifeq ($(OS),Linux)
-ifndef NOLIBS
-USE_ACL := y
-USE_LIBCAP := y
-USE_LIBURING := y
-endif
-
-ifdef USE_ACL
-LOCAL_LDLIBS += -lacl
-else
-LOCAL_CPPFLAGS += -DBFS_USE_SYS_ACL_H=0
-endif
-
-ifdef USE_LIBCAP
-LOCAL_LDLIBS += -lcap
-else
-LOCAL_CPPFLAGS += -DBFS_USE_SYS_CAPABILITY_H=0
-endif
-
-ifdef USE_LIBURING
-LOCAL_CPPFLAGS += -DBFS_USE_LIBURING=1
-LOCAL_LDLIBS += -luring
-endif
-
-LOCAL_LDFLAGS += -Wl,--as-needed
-LOCAL_LDLIBS += -lrt
-endif # Linux
-
-ifeq ($(OS),NetBSD)
-LOCAL_LDLIBS += -lutil
-endif
-
-ifeq ($(OS),DragonFly)
-LOCAL_LDLIBS += -lposix1e
-endif
-
-ifeq ($(OS),SunOS)
-LOCAL_LDLIBS += -lsocket -lnsl
-endif
-
-ifneq ($(filter gcov,$(MAKECMDGOALS)),)
-LOCAL_CFLAGS += --coverage
-# gcov only intercepts fork()/exec() with -std=gnu*
-LOCAL_CFLAGS := $(patsubst -std=c%,-std=gnu%,$(LOCAL_CFLAGS))
-endif
-
-ifneq ($(filter lint,$(MAKECMDGOALS)),)
-LOCAL_CPPFLAGS += \
-    -D_FORTIFY_SOURCE=3 \
-    -DBFS_LINT
-LOCAL_CFLAGS += -Werror -O2
-endif
-
-ifneq ($(filter release,$(MAKECMDGOALS)),)
-LOCAL_CPPFLAGS += -DNDEBUG
-CFLAGS := $(DEFAULT_CFLAGS) -O3 -flto=auto
-endif
-
-ALL_CPPFLAGS = $(LOCAL_CPPFLAGS) $(CPPFLAGS) $(EXTRA_CPPFLAGS)
-ALL_CFLAGS = $(ALL_CPPFLAGS) $(LOCAL_CFLAGS) $(CFLAGS) $(EXTRA_CFLAGS) $(DEPFLAGS)
-ALL_LDFLAGS = $(ALL_CFLAGS) $(LOCAL_LDFLAGS) $(LDFLAGS) $(EXTRA_LDFLAGS)
-ALL_LDLIBS = $(LOCAL_LDLIBS) $(LDLIBS) $(EXTRA_LDLIBS)
-
-# Default make target
-bfs: $(BIN)/bfs
-.PHONY: bfs
-
-# Goals that are treated like flags by this makefile
-FLAG_GOALS := asan lsan msan tsan ubsan gcov lint release
-
-# These are the remaining non-flag goals
-GOALS := $(filter-out $(FLAG_GOALS),$(MAKECMDGOALS))
-
-# Build the default goal if only flag goals are specified
-FLAG_PREREQS :=
-ifndef GOALS
-FLAG_PREREQS += bfs
-endif
-
-# Make sure that "make release" builds everything, but "make release obj/src/main.o" doesn't
-$(FLAG_GOALS): $(FLAG_PREREQS)
-	@:
-.PHONY: $(FLAG_GOALS)
-
-all: bfs tests
-.PHONY: all
-
-$(BIN)/%:
-	@$(MKDIR) $(@D)
-	+$(CC) $(ALL_LDFLAGS) $^ $(ALL_LDLIBS) -o $@
-ifeq ($(OS) $(SANITIZE),FreeBSD y)
-	elfctl -e +noaslr $@
-endif
-
-$(OBJ)/%.o: %.c $(OBJ)/FLAGS
-	@$(MKDIR) $(@D)
-	$(CC) $(ALL_CFLAGS) -c $< -o $@
-
-# Save the full set of flags to rebuild everything when they change
-$(OBJ)/FLAGS.new:
-	@$(MKDIR) $(@D)
-	@echo $(CC) : $(ALL_CFLAGS) : $(ALL_LDFLAGS) : $(ALL_LDLIBS) >$@
-.PHONY: $(OBJ)/FLAGS.new
-
-# Only update obj/FLAGS if obj/FLAGS.new is different
-$(OBJ)/FLAGS: $(OBJ)/FLAGS.new
-	@test -e $@ && cmp -s $@ $< && rm $< || mv $< $@
-
-# All object files except the entry point
-LIBBFS := \
-    $(OBJ)/src/alloc.o \
-    $(OBJ)/src/bar.o \
-    $(OBJ)/src/bfstd.o \
-    $(OBJ)/src/bftw.o \
-    $(OBJ)/src/color.o \
-    $(OBJ)/src/ctx.o \
-    $(OBJ)/src/diag.o \
-    $(OBJ)/src/dir.o \
-    $(OBJ)/src/dstring.o \
-    $(OBJ)/src/eval.o \
-    $(OBJ)/src/exec.o \
-    $(OBJ)/src/expr.o \
-    $(OBJ)/src/fsade.o \
-    $(OBJ)/src/ioq.o \
-    $(OBJ)/src/mtab.o \
-    $(OBJ)/src/opt.o \
-    $(OBJ)/src/parse.o \
-    $(OBJ)/src/printf.o \
-    $(OBJ)/src/pwcache.o \
-    $(OBJ)/src/stat.o \
-    $(OBJ)/src/thread.o \
-    $(OBJ)/src/trie.o \
-    $(OBJ)/src/typo.o \
-    $(OBJ)/src/xregex.o \
-    $(OBJ)/src/xspawn.o \
-    $(OBJ)/src/xtime.o
-
-# The main executable
-$(BIN)/bfs: $(OBJ)/src/main.o $(LIBBFS)
-
-# Testing utilities
-TEST_UTILS := \
-    $(BIN)/tests/mksock \
-    $(BIN)/tests/xspawnee \
-    $(BIN)/tests/xtouch
-
-$(BIN)/tests/mksock: $(OBJ)/tests/mksock.o $(LIBBFS)
-
-$(BIN)/tests/xspawnee: $(OBJ)/tests/xspawnee.o
-
-$(BIN)/tests/xtouch: $(OBJ)/tests/xtouch.o $(LIBBFS)
-
-# All test binaries
-TESTS := $(BIN)/tests/units $(TEST_UTILS)
-
-$(BIN)/tests/units: \
-    $(OBJ)/tests/alloc.o \
-    $(OBJ)/tests/bfstd.o \
-    $(OBJ)/tests/bit.o \
-    $(OBJ)/tests/ioq.o \
-    $(OBJ)/tests/main.o \
-    $(OBJ)/tests/trie.o \
-    $(OBJ)/tests/xspawn.o \
-    $(OBJ)/tests/xtime.o \
-    $(LIBBFS)
-
-# Build all the test binaries
-tests: $(TESTS)
-.PHONY: tests
-
-# Run the unit tests
-unit-tests: $(BIN)/tests/units $(BIN)/tests/xspawnee
-	$<
-.PHONY: unit-tests
-
-# The different flag combinations we check
-INTEGRATIONS := default dfs ids eds j1 j2 j3 s
-INTEGRATION_TESTS := $(INTEGRATIONS:%=check-%)
-
-check-default: $(BIN)/bfs $(TEST_UTILS)
-	+./tests/tests.sh --make="$(MAKE)" --bfs="$<" $(TEST_FLAGS)
-
-check-dfs check-ids check-eds: check-%: $(BIN)/bfs $(TEST_UTILS)
-	+./tests/tests.sh --make="$(MAKE)" --bfs="$< -S $*" $(TEST_FLAGS)
-
-check-j1 check-j2 check-j3 check-s: check-%: $(BIN)/bfs $(TEST_UTILS)
-	+./tests/tests.sh --make="$(MAKE)" --bfs="$< -$*" $(TEST_FLAGS)
-
-# Run the integration tests
-integration-tests: $(INTEGRATION_TESTS)
-.PHONY: integration-tests
-
-# Run all the tests
-check: unit-tests integration-tests
-.PHONY: check
-
-# Custom test flags for distcheck
-DISTCHECK_FLAGS := -s TEST_FLAGS="--sudo --verbose=skipped"
-
-distcheck:
-	+$(MAKE) -B asan ubsan check $(DISTCHECK_FLAGS)
-ifneq ($(OS),Darwin)
-	+$(MAKE) -B msan ubsan check CC=clang $(DISTCHECK_FLAGS)
-endif
-	+$(MAKE) -B tsan ubsan check CC=clang $(DISTCHECK_FLAGS)
-ifeq ($(OS) $(ARCH),Linux x86_64)
-	+$(MAKE) -B check EXTRA_CFLAGS="-m32" ONIG_CONFIG= USE_LIBURING= $(DISTCHECK_FLAGS)
-endif
-	+$(MAKE) -B release check $(DISTCHECK_FLAGS)
-	+$(MAKE) -B check $(DISTCHECK_FLAGS)
-	+$(MAKE) check-install $(DISTCHECK_FLAGS)
-.PHONY: distcheck
-
-clean:
-	$(RM) -r $(BIN) $(OBJ)
-.PHONY: clean
-
-install:
-	$(MKDIR) $(DESTDIR)$(PREFIX)/bin
-	$(INSTALL) -m755 $(BIN)/bfs $(DESTDIR)$(PREFIX)/bin/bfs
-	$(MKDIR) $(DESTDIR)$(MANDIR)/man1
-	$(INSTALL) -m644 docs/bfs.1 $(DESTDIR)$(MANDIR)/man1/bfs.1
-	$(MKDIR) $(DESTDIR)$(PREFIX)/share/bash-completion/completions
-	$(INSTALL) -m644 completions/bfs.bash $(DESTDIR)$(PREFIX)/share/bash-completion/completions/bfs
-	$(MKDIR) $(DESTDIR)$(PREFIX)/share/zsh/site-functions
-	$(INSTALL) -m644 completions/bfs.zsh $(DESTDIR)$(PREFIX)/share/zsh/site-functions/_bfs
-	$(MKDIR) $(DESTDIR)$(PREFIX)/share/fish/vendor_completions.d
-	$(INSTALL) -m644 completions/bfs.fish $(DESTDIR)$(PREFIX)/share/fish/vendor_completions.d/bfs.fish
-.PHONY: install
-
-uninstall:
-	$(RM) $(DESTDIR)$(PREFIX)/share/bash-completion/completions/bfs
-	$(RM) $(DESTDIR)$(PREFIX)/share/zsh/site-functions/_bfs
-	$(RM) $(DESTDIR)$(PREFIX)/share/fish/vendor_completions.d/bfs.fish
-	$(RM) $(DESTDIR)$(MANDIR)/man1/bfs.1
-	$(RM) $(DESTDIR)$(PREFIX)/bin/bfs
-.PHONY: uninstall
-
-check-install:
-	+$(MAKE) install DESTDIR=$(BUILDDIR)/pkg
-	+$(MAKE) uninstall DESTDIR=$(BUILDDIR)/pkg
-	$(BIN)/bfs $(BUILDDIR)/pkg -not -type d -print -exit 1
-	$(RM) -r $(BUILDDIR)/pkg
-.PHONY: check-install
-
-.SUFFIXES:
-
--include $(wildcard $(OBJ)/*/*.d)
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..326ee87
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,517 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# This Makefile implements the configuration and build steps for bfs.  It is
+# portable to both GNU make and the BSD make implementations (how that works
+# is documented below).  To build bfs, run
+#
+#     $ make config
+#     $ make
+
+# The default build target
+default: bfs
+.PHONY: default
+
+# BSD make will chdir into ${.OBJDIR} by default, unless we tell it not to
+.OBJDIR: .
+
+# We don't use any suffix rules
+.SUFFIXES:
+
+# GNU make has $^ for the full list of targets, while BSD make has $> and the
+# long-form ${.ALLSRC}.  We could write $^ $> to get them both, but that would
+# break if one of them implemented support for the other.  So instead, bring
+# BSD's ${.ALLSRC} to GNU.
+.ALLSRC ?= $^
+
+# Platform detection
+OS != uname
+ARCH != uname -m
+
+# For out-of-tree builds, e.g.
+#
+#     $ make config BUILDDIR=/path/to/build/dir
+#     $ make BUILDDIR=/path/to/build/dir
+BUILDDIR ?= .
+
+# Shorthand for build subdirectories
+BIN := ${BUILDDIR}/bin
+GEN := ${BUILDDIR}/gen
+OBJ := ${BUILDDIR}/obj
+
+# GNU make strips a leading ./ from target names, so do the same for BSD make
+BIN := ${BIN:./%=%}
+GEN := ${GEN:./%=%}
+OBJ := ${OBJ:./%=%}
+
+# Installation paths
+DESTDIR ?=
+PREFIX ?= /usr
+MANDIR ?= ${PREFIX}/share/man
+
+# Configurable executables; can be overridden with
+#
+#     $ make config CC=clang
+CC ?= cc
+INSTALL ?= install
+MKDIR ?= mkdir -p
+PKG_CONFIG ?= pkg-config
+RM ?= rm -f
+
+# Configurable flags
+
+CPPFLAGS ?=
+CFLAGS ?= \
+    -g \
+    -Wall \
+    -Wformat=2 \
+    -Werror=implicit \
+    -Wimplicit-fallthrough \
+    -Wmissing-declarations \
+    -Wshadow \
+    -Wsign-compare \
+    -Wstrict-prototypes
+LDFLAGS ?=
+LDLIBS ?=
+
+EXTRA_CPPFLAGS ?=
+EXTRA_CFLAGS ?=
+EXTRA_LDFLAGS ?=
+EXTRA_LDLIBS ?=
+
+GIT_VERSION != test -d .git && command -v git >/dev/null 2>&1 && git describe --always --dirty || echo 3.1.3
+VERSION ?= ${GIT_VERSION}
+
+# Immutable flags
+export BFS_CPPFLAGS= \
+    -D__EXTENSIONS__ \
+    -D_ATFILE_SOURCE \
+    -D_BSD_SOURCE \
+    -D_DARWIN_C_SOURCE \
+    -D_DEFAULT_SOURCE \
+    -D_GNU_SOURCE \
+    -D_LARGEFILE64_SOURCE \
+    -D_POSIX_PTHREAD_SEMANTICS \
+    -D_FILE_OFFSET_BITS=64 \
+    -D_TIME_BITS=64
+export BFS_CFLAGS= -std=c17 -pthread
+
+# Platform-specific system libraries
+LDLIBS,DragonFly := -lposix1e
+LDLIBS,Linux := -lrt
+LDLIBS,NetBSD := -lutil
+LDLIBS,SunOS := -lsocket -lnsl
+_BFS_LDLIBS := ${LDLIBS,${OS}}
+export BFS_LDLIBS=${_BFS_LDLIBS}
+
+# Build profiles
+ASAN ?= n
+LSAN ?= n
+MSAN ?= n
+TSAN ?= n
+UBSAN ?= n
+GCOV ?= n
+LINT ?= n
+RELEASE ?= n
+
+export ASAN_CFLAGS= -fsanitize=address
+export LSAN_CFLAGS= -fsanitize=leak
+export MSAN_CFLAGS= -fsanitize=memory -fsanitize-memory-track-origins
+export UBSAN_CFLAGS= -fsanitize=undefined
+
+# https://github.com/google/sanitizers/issues/342
+export TSAN_CPPFLAGS= -DBFS_USE_TARGET_CLONES=0
+export TSAN_CFLAGS= -fsanitize=thread
+
+SAN := ${ASAN}${LSAN}${MSAN}${TSAN}${UBSAN}
+export SAN_CFLAGS= -fno-sanitize-recover=all
+
+# MSAN and TSAN both need all code to be instrumented
+export NOLIBS= ${MSAN}${TSAN}
+
+# gcov only intercepts fork()/exec() with -std=gnu*
+export GCOV_CFLAGS= --coverage -std=gnu17
+
+export LINT_CPPFLAGS= -D_FORTIFY_SOURCE=3 -DBFS_LINT
+export LINT_CFLAGS= -Werror -O2
+
+export RELEASE_CPPFLAGS= -DNDEBUG
+export RELEASE_CFLAGS= -O3 -flto=auto
+
+# Auto-detected library dependencies.  Can be set manually with
+#
+#     $ make config USE_LIBURING=n USE_ONIGURUMA=y
+USE_LIBACL ?=
+USE_LIBCAP ?=
+USE_LIBURING ?=
+USE_ONIGURUMA ?=
+
+# Save the new value of these variables, before they potentially get overridden
+# by `-include ${CONFIG}` below
+
+_XPREFIX := ${PREFIX}
+_XMANDIR := ${MANDIR}
+
+_XOS := ${OS}
+_XARCH := ${ARCH}
+
+_XCC := ${CC}
+_XINSTALL := ${INSTALL}
+_XMKDIR := ${MKDIR}
+_XRM := ${RM}
+
+_XCPPFLAGS := ${CPPFLAGS}
+_XCFLAGS := ${CFLAGS}
+_XLDFLAGS := ${LDFLAGS}
+_XLDLIBS := ${LDLIBS}
+
+_XUSE_LIBACL := ${USE_LIBACL}
+_XUSE_LIBCAP := ${USE_LIBCAP}
+_XUSE_LIBURING := ${USE_LIBURING}
+_XUSE_ONIGURUMA := ${USE_ONIGURUMA}
+
+# GNU make supports `export VAR`, but BSD make requires `export VAR=value`.
+# Sadly, GNU make gives a recursion error on `export VAR=${VAR}`.
+
+_BUILDDIR := ${BUILDDIR}
+_PKG_CONFIG := ${PKG_CONFIG}
+
+export BUILDDIR=${_BUILDDIR}
+export PKG_CONFIG=${_PKG_CONFIG}
+
+export XPREFIX=${_XPREFIX}
+export XMANDIR=${_XMANDIR}
+
+export XOS=${_XOS}
+export XARCH=${_XARCH}
+
+export XCC=${_XCC}
+export XINSTALL=${_XINSTALL}
+export XMKDIR=${_XMKDIR}
+export XRM=${_XRM}
+
+export XCPPFLAGS=${_XCPPFLAGS}
+export XCFLAGS=${_XCFLAGS}
+export XLDFLAGS=${_XLDFLAGS}
+export XLDLIBS=${_XLDLIBS}
+
+export XUSE_LIBACL=${_XUSE_LIBACL}
+export XUSE_LIBCAP=${_XUSE_LIBCAP}
+export XUSE_LIBURING=${_XUSE_LIBURING}
+export XUSE_ONIGURUMA=${_XUSE_ONIGURUMA}
+
+# The configuration file generated by `make config`
+CONFIG := ${GEN}/config.mk
+-include ${CONFIG}
+
+## Configuration phase (`make config`)
+
+# External dependencies
+PKGS := \
+    ${GEN}/libacl.mk \
+    ${GEN}/libcap.mk \
+    ${GEN}/liburing.mk \
+    ${GEN}/oniguruma.mk
+
+# Makefile fragments generated by `make config`
+MKS := \
+    ${GEN}/vars.mk \
+    ${GEN}/deps.mk \
+    ${GEN}/objs.mk \
+    ${PKGS}
+
+# The configuration goal itself
+config: ${MKS}
+	@printf 'include $${GEN}/%s\n' ${MKS:${GEN}/%=%} >${CONFIG}
+.PHONY: config
+
+# Saves the configurable variables
+${GEN}/vars.mk::
+	@${XMKDIR} ${@D}
+	@printf 'PREFIX := %s\n' "$$XPREFIX" >$@
+	@printf 'MANDIR := %s\n' "$$XMANDIR" >>$@
+	@printf 'OS := %s\n' "$$XOS" >>$@
+	@printf 'ARCH := %s\n' "$$XARCH" >>$@
+	@printf 'CC := %s\n' "$$XCC" >>$@
+	@printf 'INSTALL := %s\n' "$$XINSTALL" >>$@
+	@printf 'MKDIR := %s\n' "$$XMKDIR" >>$@
+	@printf 'RM := %s\n' "$$XRM" >>$@
+	@printf 'CPPFLAGS := %s\n' "$$BFS_CPPFLAGS" >>$@
+	@test "${TSAN}" != y || printf 'CPPFLAGS += %s\n' "$$TSAN_CPPFLAGS" >>$@
+	@test "${LINT}" != y || printf 'CPPFLAGS += %s\n' "$$LINT_CPPFLAGS" >>$@
+	@test "${RELEASE}" != y || printf 'CPPFLAGS += %s\n' "$$RELEASE_CPPFLAGS" >>$@
+	@test -z "$$XCPPFLAGS" || printf 'CPPFLAGS += %s\n' "$$XCPPFLAGS" >>$@
+	@test -z "$$EXTRA_CPPFLAGS" || printf 'CPPFLAGS += %s\n' "$$EXTRA_CPPFLAGS" >>$@
+	@printf 'CFLAGS := %s\n' "$$BFS_CFLAGS" >>$@
+	@test "${ASAN}" != y || printf 'CFLAGS += %s\n' "$$ASAN_CFLAGS" >>$@
+	@test "${LSAN}" != y || printf 'CFLAGS += %s\n' "$$LSAN_CFLAGS" >>$@
+	@test "${MSAN}" != y || printf 'CFLAGS += %s\n' "$$MSAN_CFLAGS" >>$@
+	@test "${TSAN}" != y || printf 'CFLAGS += %s\n' "$$TSAN_CFLAGS" >>$@
+	@test "${UBSAN}" != y || printf 'CFLAGS += %s\n' "$$UBSAN_CFLAGS" >>$@
+	@case "${SAN}" in *y*) printf 'CFLAGS += %s\n' "$$SAN_CFLAGS" >>$@ ;; esac
+	@test "${GCOV}" != y || printf 'CFLAGS += %s\n' "$$GCOV_CFLAGS" >>$@
+	@test "${LINT}" != y || printf 'CFLAGS += %s\n' "$$LINT_CFLAGS" >>$@
+	@test "${RELEASE}" != y || printf 'CFLAGS += %s\n' "$$RELEASE_CFLAGS" >>$@
+	@test -z "$$XCFLAGS" || printf 'CFLAGS += %s\n' "$$XCFLAGS" >>$@
+	@test -z "$$EXTRA_CFLAGS" || printf 'CFLAGS += %s\n' "$$EXTRA_CFLAGS" >>$@
+	@printf 'LDFLAGS := %s\n' "$$XLDFLAGS" >>$@
+	@test -z "$$EXTRA_LDFLAGS" || printf 'LDFLAGS += %s\n' "$$EXTRA_LDFLAGS" >>$@
+	@printf 'LDLIBS := %s\n' "$$XLDLIBS" >>$@
+	@test -z "$$EXTRA_LDLIBS" || printf 'LDLIBS += %s\n' "$$EXTRA_LDLIBS" >>$@
+	@test -z "$$BFS_LDLIBS" || printf 'LDLIBS += %s\n' "$$BFS_LDLIBS" >>$@
+	@case "${OS}-${SAN}" in FreeBSD-*y*) printf 'POSTLINK = elfctl -e +noaslr $$@\n' >>$@ ;; esac
+	@cat $@
+
+# Check for dependency generation support
+${GEN}/deps.mk::
+	@${MKDIR} ${@D}
+	@if config/cc.sh -MD -MP -MF /dev/null config/empty.c; then \
+	    echo 'DEPFLAGS = -MD -MP -MF $${@:.o=.d}'; \
+	fi 2>$@.log | tee $@
+	@printf -- '-include %s\n' ${OBJS:.o=.d} >>$@
+
+# Lists file.o: file.c dependencies
+${GEN}/objs.mk::
+	@${MKDIR} ${@D}
+	@for obj in ${OBJS:${OBJ}/%.o=%}; do printf '$${OBJ}/%s.o: %s.c\n' "$$obj" "$$obj"; done >$@
+
+# Auto-detect dependencies and their build flags
+${PKGS}::
+	@${MKDIR} ${@D}
+	@config/pkg.sh ${@:${GEN}/%.mk=%} >$@ 2>$@.log
+	@cat $@
+
+# bfs used to have flag-like targets (`make release`, `make asan ubsan`, etc.).
+# Direct users to the new configuration system.
+asan lsan msan tsan ubsan gcov lint release::
+	@printf 'error: `make %s` is no longer supported. ' $@ >&2
+	@printf 'Use `make config %s=y` instead.\n' $$(echo $@ | tr '[a-z]' '[A-Z]') >&2
+	@false
+
+## Build phase (`make`)
+
+# The main binary
+bfs: ${BIN}/bfs
+.PHONY: bfs
+
+# All binaries
+BINS := \
+    ${BIN}/bfs \
+    ${BIN}/tests/mksock \
+    ${BIN}/tests/units \
+    ${BIN}/tests/xspawnee \
+    ${BIN}/tests/xtouch
+
+all: ${BINS}
+.PHONY: all
+
+# All object files except the entry point
+LIBBFS := \
+    ${OBJ}/src/alloc.o \
+    ${OBJ}/src/bar.o \
+    ${OBJ}/src/bfstd.o \
+    ${OBJ}/src/bftw.o \
+    ${OBJ}/src/color.o \
+    ${OBJ}/src/ctx.o \
+    ${OBJ}/src/diag.o \
+    ${OBJ}/src/dir.o \
+    ${OBJ}/src/dstring.o \
+    ${OBJ}/src/eval.o \
+    ${OBJ}/src/exec.o \
+    ${OBJ}/src/expr.o \
+    ${OBJ}/src/fsade.o \
+    ${OBJ}/src/ioq.o \
+    ${OBJ}/src/mtab.o \
+    ${OBJ}/src/opt.o \
+    ${OBJ}/src/parse.o \
+    ${OBJ}/src/printf.o \
+    ${OBJ}/src/pwcache.o \
+    ${OBJ}/src/stat.o \
+    ${OBJ}/src/thread.o \
+    ${OBJ}/src/trie.o \
+    ${OBJ}/src/typo.o \
+    ${OBJ}/src/version.o \
+    ${OBJ}/src/xregex.o \
+    ${OBJ}/src/xspawn.o \
+    ${OBJ}/src/xtime.o
+
+# Group relevant flags together
+ALL_CFLAGS = ${CPPFLAGS} ${CFLAGS} ${DEPFLAGS}
+ALL_LDFLAGS = ${CFLAGS} ${LDFLAGS}
+
+# The main binary
+${BIN}/bfs: ${LIBBFS} ${OBJ}/src/main.o
+
+${BINS}:
+	@${MKDIR} ${@D}
+	+${CC} ${ALL_LDFLAGS} ${.ALLSRC} ${LDLIBS} -o $@
+	${POSTLINK}
+
+# All object files
+OBJS := \
+    ${OBJ}/src/main.o \
+    ${OBJ}/tests/alloc.o \
+    ${OBJ}/tests/bfstd.o \
+    ${OBJ}/tests/bit.o \
+    ${OBJ}/tests/ioq.o \
+    ${OBJ}/tests/main.o \
+    ${OBJ}/tests/mksock.o \
+    ${OBJ}/tests/trie.o \
+    ${OBJ}/tests/xspawn.o \
+    ${OBJ}/tests/xspawnee.o \
+    ${OBJ}/tests/xtime.o \
+    ${OBJ}/tests/xtouch.o \
+    ${LIBBFS}
+
+# Depend on ${CONFIG} to make sure `make config` runs first, and to rebuild when
+# the configuration changes
+${OBJS}: ${CONFIG}
+	@${MKDIR} ${@D}
+	${CC} ${ALL_CFLAGS} -c ${@:${OBJ}/%.o=%.c} -o $@
+
+# Save the version number to this file, but only update VERSION if it changes
+${GEN}/NEWVERSION::
+	@${MKDIR} ${@D}
+	@printf '%s\n' '${VERSION}' >$@
+
+${GEN}/VERSION: ${GEN}/NEWVERSION
+	@test -e $@ && cmp -s $@ ${.ALLSRC} && rm ${.ALLSRC} || mv ${.ALLSRC} $@
+
+# Rebuild version.c whenever the version number changes
+${OBJ}/src/version.o: ${GEN}/VERSION
+${OBJ}/src/version.o: CPPFLAGS := ${CPPFLAGS} -DBFS_VERSION='"${VERSION}"'
+
+# Clean all build products
+clean::
+	${RM} -r ${BIN} ${OBJ}
+
+# Clean everything, including generated files
+distclean: clean
+	${RM} -r ${GEN}
+.PHONY: distclean
+
+## Test phase (`make check`)
+
+# Unit test binaries
+UTEST_BINS := \
+    ${BIN}/tests/units \
+    ${BIN}/tests/xspawnee
+
+# Integration test binaries
+ITEST_BINS := \
+    ${BIN}/tests/mksock \
+    ${BIN}/tests/xtouch
+
+# Build (but don't run) test binaries
+tests: ${UTEST_BINS} ${ITEST_BINS}
+.PHONY: tests
+
+# Run all the tests
+check: unit-tests integration-tests
+.PHONY: check
+
+# Run the unit tests
+unit-tests: ${UTEST_BINS}
+	${BIN}/tests/units
+.PHONY: unit-tests
+
+${BIN}/tests/units: \
+    ${OBJ}/tests/alloc.o \
+    ${OBJ}/tests/bfstd.o \
+    ${OBJ}/tests/bit.o \
+    ${OBJ}/tests/ioq.o \
+    ${OBJ}/tests/main.o \
+    ${OBJ}/tests/trie.o \
+    ${OBJ}/tests/xspawn.o \
+    ${OBJ}/tests/xtime.o \
+    ${LIBBFS}
+
+${BIN}/tests/xspawnee: \
+    ${OBJ}/tests/xspawnee.o
+
+# The different flag combinations we check
+INTEGRATIONS := default dfs ids eds j1 j2 j3 s
+INTEGRATION_TESTS := ${INTEGRATIONS:%=check-%}
+
+# Check just `bfs`
+check-default: ${BIN}/bfs ${ITEST_BINS}
+	+./tests/tests.sh --make="${MAKE}" --bfs="${BIN}/bfs" ${TEST_FLAGS}
+
+# Check the different search strategies
+check-dfs check-ids check-eds: ${BIN}/bfs ${ITEST_BINS}
+	+./tests/tests.sh --make="${MAKE}" --bfs="${BIN}/bfs -S ${@:check-%=%}" ${TEST_FLAGS}
+
+# Check various flags
+check-j1 check-j2 check-j3 check-s: ${BIN}/bfs ${ITEST_BINS}
+	+./tests/tests.sh --make="${MAKE}" --bfs="${BIN}/bfs -${@:check-%=%}" ${TEST_FLAGS}
+
+# Run the integration tests
+integration-tests: ${INTEGRATION_TESTS}
+.PHONY: integration-tests
+
+${BIN}/tests/mksock: \
+    ${OBJ}/tests/mksock.o \
+    ${LIBBFS}
+
+${BIN}/tests/xtouch: \
+    ${OBJ}/tests/xtouch.o \
+    ${LIBBFS}
+
+# `make distcheck` configurations
+DISTCHECKS := distcheck-asan distcheck-tsan distcheck-release
+
+# Don't use msan on macOS
+IS_DARWIN,Darwin := y
+IS_DARWIN := ${IS_DARWIN,${OS}}
+DISTCHECK_MSAN, := distcheck-msan
+DISTCHECKS += ${DISTCHECK_MSAN,${IS_DARWIN}}
+
+# Only add a 32-bit build on 64-bit Linux
+DISTCHECK_M32,Linux,x86_64 := distcheck-m32
+DISTCHECKS += ${DISTCHECK_M32,${OS},${ARCH}}
+
+# Test multiple configurations
+distcheck: ${DISTCHECKS}
+.PHONY: distcheck
+
+# Per-distcheck configuration
+DISTCHECK_CONFIG_asan := ASAN=y UBSAN=y
+DISTCHECK_CONFIG_msan := MSAN=y UBSAN=y CC=clang
+DISTCHECK_CONFIG_tsan := TSAN=y UBSAN=y CC=clang
+DISTCHECK_CONFIG_m32 := EXTRA_CFLAGS="-m32" PKG_CONFIG_PATH=/usr/lib32/pkgconfig USE_LIBURING=n
+DISTCHECK_CONFIG_release := RELEASE=y
+
+${DISTCHECKS}::
+	+${MAKE} -rs BUILDDIR=${BUILDDIR}/$@ config ${DISTCHECK_CONFIG_${@:distcheck-%=%}}
+	+${MAKE} -s BUILDDIR=${BUILDDIR}/$@ check TEST_FLAGS="--sudo --verbose=skipped"
+
+## Packaging (`make install`)
+
+DEST_PREFIX := ${DESTDIR}${PREFIX}
+DEST_MANDIR := ${DESTDIR}${MANDIR}
+
+install::
+	${MKDIR} ${DEST_PREFIX}/bin
+	${INSTALL} -m755 ${BIN}/bfs ${DEST_PREFIX}/bin/bfs
+	${MKDIR} ${DEST_MANDIR}/man1
+	${INSTALL} -m644 docs/bfs.1 ${DEST_MANDIR}/man1/bfs.1
+	${MKDIR} ${DEST_PREFIX}/share/bash-completion/completions
+	${INSTALL} -m644 completions/bfs.bash ${DEST_PREFIX}/share/bash-completion/completions/bfs
+	${MKDIR} ${DEST_PREFIX}/share/zsh/site-functions
+	${INSTALL} -m644 completions/bfs.zsh ${DEST_PREFIX}/share/zsh/site-functions/_bfs
+	${MKDIR} ${DEST_PREFIX}/share/fish/vendor_completions.d
+	${INSTALL} -m644 completions/bfs.fish ${DEST_PREFIX}/share/fish/vendor_completions.d/bfs.fish
+
+uninstall::
+	${RM} ${DEST_PREFIX}/share/bash-completion/completions/bfs
+	${RM} ${DEST_PREFIX}/share/zsh/site-functions/_bfs
+	${RM} ${DEST_PREFIX}/share/fish/vendor_completions.d/bfs.fish
+	${RM} ${DEST_MANDIR}/man1/bfs.1
+	${RM} ${DEST_PREFIX}/bin/bfs
+
+# Check that `make install` works and `make uninstall` removes everything
+check-install::
+	+${MAKE} install DESTDIR=${BUILDDIR}/pkg
+	+${MAKE} uninstall DESTDIR=${BUILDDIR}/pkg
+	${BIN}/bfs ${BUILDDIR}/pkg -not -type d -print -exit 1
+	${RM} -r ${BUILDDIR}/pkg
diff --git a/README.md b/README.md
index 17226fd..b95c16b 100644
--- a/README.md
+++ b/README.md
@@ -333,6 +333,7 @@ Once you have the dependencies, you can build bfs.
 Download one of the [releases](https://github.com/tavianator/bfs/releases) or clone the [git repo](https://github.com/tavianator/bfs).
 Then run
 
+    $ make config
     $ make
 
 This will build the `./bin/bfs` binary.
@@ -342,7 +343,8 @@ Run the test suite to make sure it works correctly:
 
 If you're interested in speed, you may want to build the release version instead:
 
-    $ make release
+    $ make config RELEASE=y
+    $ make
 
 Finally, if you want to install it globally, run
 
diff --git a/config/cc.sh b/config/cc.sh
new file mode 100755
index 0000000..04b142a
--- /dev/null
+++ b/config/cc.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Run the compiler and check if it succeeded
+
+printf '$ %s' "$XCC" >&2
+printf ' %q' "$@" >&2
+printf ' -o /dev/null\n' >&2
+
+$XCC "$@" -o /dev/null
diff --git a/config/empty.c b/config/empty.c
new file mode 100644
index 0000000..4fa9a5b
--- /dev/null
+++ b/config/empty.c
@@ -0,0 +1,6 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+int main(void) {
+	return 0;
+}
diff --git a/config/libacl.c b/config/libacl.c
new file mode 100644
index 0000000..877cb69
--- /dev/null
+++ b/config/libacl.c
@@ -0,0 +1,6 @@
+#include 
+
+int main(void) {
+	acl_free(0);
+	return 0;
+}
diff --git a/config/libcap.c b/config/libcap.c
new file mode 100644
index 0000000..64188ac
--- /dev/null
+++ b/config/libcap.c
@@ -0,0 +1,6 @@
+#include 
+
+int main(void) {
+	cap_free(0);
+	return 0;
+}
diff --git a/config/liburing.c b/config/liburing.c
new file mode 100644
index 0000000..456059c
--- /dev/null
+++ b/config/liburing.c
@@ -0,0 +1,6 @@
+#include 
+
+int main(void) {
+	io_uring_free_probe(0);
+	return 0;
+}
diff --git a/config/oniguruma.c b/config/oniguruma.c
new file mode 100644
index 0000000..b834fac
--- /dev/null
+++ b/config/oniguruma.c
@@ -0,0 +1,6 @@
+#include 
+
+int main(void) {
+	onig_free(0);
+	return 0;
+}
diff --git a/config/pkg.sh b/config/pkg.sh
new file mode 100755
index 0000000..6335b4b
--- /dev/null
+++ b/config/pkg.sh
@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# pkg-config wrapper that outputs a makefile fragment
+
+set -eu
+
+NAME="${1^^}"
+declare -n XUSE="XUSE_$NAME"
+
+if [ "$XUSE" ]; then
+    USE="$XUSE"
+elif [[ "$NOLIBS" == *y* ]]; then
+    USE=n
+elif config/pkgconf.sh "$1"; then
+    USE=y
+else
+    USE=n
+fi
+
+printf '%s := %s\n' "USE_$NAME" "$USE"
+
+if [ "$USE" = y ]; then
+    printf 'CPPFLAGS += -DBFS_USE_%s=1\n' "$NAME"
+
+    CFLAGS=$(config/pkgconf.sh --cflags "$1")
+    if [ "$CFLAGS" ]; then
+        printf 'CFLAGS += %s\n' "$CFLAGS"
+    fi
+
+    LDFLAGS=$(config/pkgconf.sh --ldflags "$1")
+    if [ "$LDFLAGS" ]; then
+        printf 'LDFLAGS += %s\n' "$LDFLAGS"
+    fi
+
+    LDLIBS=$(config/pkgconf.sh --ldlibs "$1")
+    if [ "$LDLIBS" ]; then
+        printf 'LDLIBS += %s\n' "$LDLIBS"
+    fi
+else
+    printf 'CPPFLAGS += -DBFS_USE_%s=0\n' "$NAME"
+fi
diff --git a/config/pkgconf.sh b/config/pkgconf.sh
new file mode 100755
index 0000000..070fad6
--- /dev/null
+++ b/config/pkgconf.sh
@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# pkg-config wrapper with hardcoded fallbacks
+
+set -eu
+
+MODE=
+if [[ "$1" == --* ]]; then
+    MODE="$1"
+    shift
+fi
+
+if command -v "${PKG_CONFIG:-}" &>/dev/null; then
+    case "$MODE" in
+        --cflags)
+            "$PKG_CONFIG" --cflags "$@"
+            ;;
+        --ldflags)
+            "$PKG_CONFIG" --libs-only-L --libs-only-other "$@"
+            ;;
+        --ldlibs)
+            "$PKG_CONFIG" --libs-only-l "$@"
+            ;;
+        "")
+            "$PKG_CONFIG" "$@"
+            ;;
+    esac
+else
+    for lib; do
+        case "$lib" in
+            libacl)
+                LDLIB=-lacl
+                ;;
+            libcap)
+                LDLIB=-lcap
+                ;;
+            liburing)
+                LDLIB=-luring
+                ;;
+            oniguruma)
+                LDLIB=-lonig
+                ;;
+            *)
+                printf 'error: Unknown package %s\n' "$lib" >&2
+                exit 1
+        esac
+
+        case "$MODE" in
+            --ldlibs)
+                printf ' %s' "$LDLIB"
+                ;;
+            "")
+                config/cc.sh "config/$lib.c" "$LDLIB" || exit $?
+                ;;
+        esac
+    done
+
+    if [ "$MODE" = "--ldlibs" ]; then
+        printf '\n'
+    fi
+fi
diff --git a/docs/BUILDING.md b/docs/BUILDING.md
index 7eb3a37..abf6185 100644
--- a/docs/BUILDING.md
+++ b/docs/BUILDING.md
@@ -7,9 +7,10 @@ Compiling
 `bfs` uses [GNU Make](https://www.gnu.org/software/make/) as its build system.
 A simple invocation of
 
+    $ make config
     $ make
 
-should build `bfs` successfully, with no additional steps necessary.
+should build `bfs` successfully.
 As usual with `make`, you can run a [parallel build](https://www.gnu.org/software/make/manual/html_node/Parallel.html) with `-j`.
 For example, to use all your cores, run `make -j$(nproc)`.
 
@@ -17,25 +18,28 @@ For example, to use all your cores, run `make -j$(nproc)`.
 
 | Command          | Description                                                   |
 |------------------|---------------------------------------------------------------|
+| `make config`    | Configures the build system                                   |
 | `make`           | Builds just the `bfs` binary                                  |
 | `make all`       | Builds everything, including the tests (but doesn't run them) |
 | `make check`     | Builds everything, and runs the tests                         |
 | `make install`   | Installs `bfs` (with man page, shell completions, etc.)       |
 | `make uninstall` | Uninstalls `bfs`                                              |
+| `make clean`     | Delete the build products                                     |
+| `make mrclean`   | Delete all generated files, including the build configuration |
 
-### Flag-like targets
+### Build profiles
 
-The build system provides a few shorthand targets for handy configurations:
+The configuration system provides a few shorthand flags for handy configurations:
 
-| Command        | Description                                                 |
-|----------------|-------------------------------------------------------------|
-| `make release` | Build `bfs` with optimizations, LTO, and without assertions |
-| `make asan`    | Enable [AddressSanitizer]                                   |
-| `make lsan`    | Enable [LeakSanitizer]                                      |
-| `make msan`    | Enable [MemorySanitizer]                                    |
-| `make tsan`    | Enable [ThreadSanitizer]                                    |
-| `make ubsan`   | Enable [UndefinedBehaviorSanitizer]                         |
-| `make gcov`    | Enable [code coverage]                                      |
+| Command                 | Description                                                 |
+|-------------------------|-------------------------------------------------------------|
+| `make config RELEASE=y` | Build `bfs` with optimizations, LTO, and without assertions |
+| `make config ASAN=y`    | Enable [AddressSanitizer]                                   |
+| `make config LSAN=y`    | Enable [LeakSanitizer]                                      |
+| `make config MSAN=y`    | Enable [MemorySanitizer]                                    |
+| `make config TSAN=y`    | Enable [ThreadSanitizer]                                    |
+| `make config UBSAN=y`   | Enable [UndefinedBehaviorSanitizer]                         |
+| `make config GCOV=y`    | Enable [code coverage]                                      |
 
 [AddressSanitizer]: https://github.com/google/sanitizers/wiki/AddressSanitizer
 [LeakSanitizer]: https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer#stand-alone-mode
@@ -44,38 +48,38 @@ The build system provides a few shorthand targets for handy configurations:
 [UndefinedBehaviorSanitizer]: https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html
 [code coverage]: https://gcc.gnu.org/onlinedocs/gcc/Gcov.html
 
-You can combine multiple flags and other targets (e.g. `make asan ubsan check`), but not all of them will work together.
+You can combine multiple profiles (e.g. `make config ASAN=y UBSAN=y`), but not all of them will work together.
 
 ### Flags
 
-Other flags are controlled with `make` variables and/or environment variables.
-Here are some of the common ones; check the [`GNUmakefile`](/GNUmakefile) for more.
-
-| Flag                             | Description                                 |
-|----------------------------------|---------------------------------------------|
-| `CC`                             | The C compiler to use, e.g. `make CC=clang` |
-| `CFLAGS`
`EXTRA_CFLAGS`       | Override/add to the default compiler flags  |
-| `LDFLAGS`
`EXTRA_LDFLAGS`     | Override/add to the linker flags            |
-| `USE_ACL`
`USE_LIBCAP`
... | Enable/disable [optional dependencies]      |
-| `TEST_FLAGS`                     | `tests.sh` flags for `make check`           |
-| `BUILDDIR`                       | The build output directory (default: `.`)   |
-| `DESTDIR`                        | The root directory for `make install`       |
-| `PREFIX`                         | The installation prefix (default: `/usr`)   |
-| `MANDIR`                         | The man page installation directory         |
+Other flags can be specified on the `make config` command line or in the environment.
+Here are some of the common ones; check the [`Makefile`](/Makefile) for more.
+
+| Flag                             | Description                                        |
+|----------------------------------|----------------------------------------------------|
+| `CC`                             | The C compiler to use, e.g. `make config CC=clang` |
+| `CFLAGS`
`EXTRA_CFLAGS`       | Override/add to the default compiler flags         |
+| `LDFLAGS`
`EXTRA_LDFLAGS`     | Override/add to the linker flags                   |
+| `USE_ACL`
`USE_LIBCAP`
... | Enable/disable [optional dependencies]             |
+| `TEST_FLAGS`                     | `tests.sh` flags for `make check`                  |
+| `BUILDDIR`                       | The build output directory (default: `.`)          |
+| `DESTDIR`                        | The root directory for `make install`              |
+| `PREFIX`                         | The installation prefix (default: `/usr`)          |
+| `MANDIR`                         | The man page installation directory                |
 
 [optional dependencies]: #dependencies
 
 ### Dependencies
 
 `bfs` depends on some system libraries for some of its features.
-These dependencies are optional, and can be turned off at build time if necessary by setting the appropriate variable to the empty string (e.g. `make USE_ONIGURUMA=`).
+These dependencies are optional, and can be turned off in `make config` if necessary by setting the appropriate variable to `n` (e.g. `make config USE_ONIGURUMA=n`).
 
-| Dependency  | Platforms  | `make` flag     |
-|-------------|------------|-----------------|
-| [acl]       | Linux only | `USE_ACL`       |
-| [libcap]    | Linux only | `USE_LIBCAP`    |
-| [liburing]  | Linux only | `USE_LIBURING`  |
-| [Oniguruma] | All        | `USE_ONIGURUMA` |
+| Dependency  | Platforms  | `make config` flag |
+|-------------|------------|--------------------|
+| [acl]       | Linux only | `USE_ACL`          |
+| [libcap]    | Linux only | `USE_LIBCAP`       |
+| [liburing]  | Linux only | `USE_LIBURING`     |
+| [Oniguruma] | All        | `USE_ONIGURUMA`    |
 
 [acl]: https://savannah.nongnu.org/projects/acl
 [libcap]: https://sites.google.com/site/fullycapable/
@@ -84,21 +88,22 @@ These dependencies are optional, and can be turned off at build time if necessar
 
 ### Dependency tracking
 
-The build system automatically tracks header dependencies with the `-M` family of compiler options (see `DEPFLAGS` in the [`GNUmakefile`](/GNUmakefile)).
+The build system automatically tracks header dependencies with the `-M` family of compiler options (see `DEPFLAGS` in the [`Makefile`](/Makefile)).
 So if you edit a header file, `make` will rebuild the necessary object files ensuring they don't go out of sync.
 
+We also add a dependency on the current configuration, so you can change configurations and rebuild without having to `make clean`.
+
 We go one step further than most build systems by tracking the flags that were used for the previous compilation.
 That means you can change configurations without having to `make clean`.
 For example,
 
+    $ make config
+    $ make
+    $ make config RELEASE=y
     $ make
-    $ make release
 
 will build the project in debug mode and then rebuild it in release mode.
 
-A side effect of this may be surprising: `make check` by itself will rebuild the project in the default configuration.
-To test a different configuration, you'll have to repeat it (e.g. `make release check`).
-
 
 Testing
 -------
diff --git a/docs/USAGE.md b/docs/USAGE.md
index 071c95b..70f8475 100644
--- a/docs/USAGE.md
+++ b/docs/USAGE.md
@@ -7,8 +7,8 @@ When invoked with no arguments, `bfs` will list everything under the current dir
 ```console
 $ bfs
 .
-./GNUmakefile
 ./LICENSE
+./Makefile
 ./README.md
 ./completions
 ./docs
diff --git a/src/config.h b/src/config.h
index 506ad3e..2eff1fc 100644
--- a/src/config.h
+++ b/src/config.h
@@ -29,13 +29,14 @@
 #ifndef BFS_COMMAND
 #  define BFS_COMMAND "bfs"
 #endif
-#ifndef BFS_VERSION
-#  define BFS_VERSION "3.1.3"
-#endif
 #ifndef BFS_HOMEPAGE
 #  define BFS_HOMEPAGE "https://tavianator.com/projects/bfs.html"
 #endif
 
+// This is a symbol instead of a literal so we don't have to rebuild everything
+// when the version number changes
+extern const char bfs_version[];
+
 // Check for system headers
 
 #ifdef __has_include
@@ -97,10 +98,10 @@
 #  define BFS_USE_PATHS_H BFS_HAS_PATHS_H
 #endif
 #ifndef BFS_USE_SYS_ACL_H
-#  define BFS_USE_SYS_ACL_H (BFS_HAS_SYS_ACL_H && !__illumos__)
+#  define BFS_USE_SYS_ACL_H (BFS_HAS_SYS_ACL_H && !__illumos__ && (!__linux__ || BFS_USE_LIBACL))
 #endif
 #ifndef BFS_USE_SYS_CAPABILITY_H
-#  define BFS_USE_SYS_CAPABILITY_H (BFS_HAS_SYS_CAPABILITY_H && !__FreeBSD__)
+#  define BFS_USE_SYS_CAPABILITY_H (BFS_HAS_SYS_CAPABILITY_H && !__FreeBSD__ && (!__linux__ || BFS_USE_LIBCAP))
 #endif
 #ifndef BFS_USE_SYS_EXTATTR_H
 #  define BFS_USE_SYS_EXTATTR_H (BFS_HAS_SYS_EXTATTR_H && !__DragonFly__)
diff --git a/src/main.c b/src/main.c
index e120f03..b4d65ce 100644
--- a/src/main.c
+++ b/src/main.c
@@ -40,6 +40,7 @@
  *     - thread.h      (multi-threading)
  *     - trie.[ch]     (a trie set/map implementation)
  *     - typo.[ch]     (fuzzy matching for typos)
+ *     - version.c     (defines the version number)
  *     - xregex.[ch]   (regular expression support)
  *     - xspawn.[ch]   (spawns processes)
  *     - xtime.[ch]    (date/time handling utilities)
diff --git a/src/parse.c b/src/parse.c
index 2dfcab2..38ebf3f 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -2909,7 +2909,7 @@ static struct bfs_expr *parse_help(struct bfs_parser *parser, int arg1, int arg2
  * "Parse" -version.
  */
 static struct bfs_expr *parse_version(struct bfs_parser *parser, int arg1, int arg2) {
-	cfprintf(parser->ctx->cout, "${ex}%s${rs} ${bld}%s${rs}\n\n", BFS_COMMAND, BFS_VERSION);
+	cfprintf(parser->ctx->cout, "${ex}%s${rs} ${bld}%s${rs}\n\n", BFS_COMMAND, bfs_version);
 
 	printf("%s\n", BFS_HOMEPAGE);
 
diff --git a/src/version.c b/src/version.c
new file mode 100644
index 0000000..736f3d5
--- /dev/null
+++ b/src/version.c
@@ -0,0 +1,6 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include "config.h"
+
+const char bfs_version[] = BFS_VERSION;
diff --git a/tests/run.sh b/tests/run.sh
index 720515d..ab1ed6d 100644
--- a/tests/run.sh
+++ b/tests/run.sh
@@ -156,7 +156,7 @@ comake() {
              -f "$TESTS/tests.mk" \
              DONE=$DONE_PIPE \
              READY=$READY_PIPE \
-             "${TEST_CASES[@]/#/tests/}" \
+             "${!TEST_CASES[@]}" \
              /dev/null
     }
 
diff --git a/tests/tests.mk b/tests/tests.mk
index 5bf4f6c..035ca79 100644
--- a/tests/tests.mk
+++ b/tests/tests.mk
@@ -1,7 +1,13 @@
 # Copyright © Tavian Barnes 
 # SPDX-License-Identifier: 0BSD
 
-# GNU makefile that exposes make's job control to tests.sh
+# Makefile that exposes make's job control to tests.sh
 
-tests/%:
+# BSD make will chdir into ${.OBJDIR} by default, unless we tell it not to
+.OBJDIR: .
+
+# Turn off implicit rules
+.SUFFIXES:
+
+.DEFAULT::
 	bash -c 'printf . >&$(READY) && read -r -N1 -u$(DONE)'
-- 
cgit v1.2.3


From c4c063e9844f2bd2271b2e3391f59f872c66f69a Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Tue, 16 Apr 2024 18:43:49 -0400
Subject: build: Refactor configuration

We now use a recursive make invocation to do the work of `make config`.
The new implementation is also compatible with GNU make 3.81 found on
macOS.
---
 .github/workflows/ci.yml |   5 +-
 Makefile                 | 369 +++++------------------------------------------
 config/cc.sh             |   2 +-
 config/config.mk         |  77 ++++++++++
 config/deps.mk           |  15 +-
 config/exports.mk        |  19 +++
 config/flags.mk          | 119 +++++++++++++++
 config/pkg.mk            |  17 ++-
 config/pkgconf.sh        |  12 +-
 config/pkgs.mk           |  17 ++-
 config/prelude.mk        | 164 +++++++++++++++++++++
 config/vars.mk           |  21 ---
 config/vars.sh           |  81 -----------
 13 files changed, 454 insertions(+), 464 deletions(-)
 create mode 100644 config/config.mk
 create mode 100644 config/exports.mk
 create mode 100644 config/flags.mk
 create mode 100644 config/prelude.mk
 delete mode 100644 config/vars.mk
 delete mode 100755 config/vars.sh

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 78aa196..3ad924f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,13 +53,12 @@ jobs:
         run: |
           brew install \
               bash \
-              expect \
-              make
+              expect
 
       - name: Run tests
         run: |
           jobs=$(sysctl -n hw.ncpu)
-          gmake -j$jobs distcheck
+          make -j$jobs distcheck
 
   freebsd:
     name: FreeBSD
diff --git a/Makefile b/Makefile
index 7cddc51..e9efef3 100644
--- a/Makefile
+++ b/Makefile
@@ -2,285 +2,27 @@
 # SPDX-License-Identifier: 0BSD
 
 # This Makefile implements the configuration and build steps for bfs.  It is
-# portable to both GNU make and the BSD make implementations (how that works
-# is documented below).  To build bfs, run
+# portable to both GNU make and most BSD make implementations.  To build bfs,
+# run
 #
 #     $ make config
 #     $ make
 
+# Utilities and GNU/BSD portability
+include config/prelude.mk
+
 # The default build target
 default: bfs
 .PHONY: default
 
-# BSD make will chdir into ${.OBJDIR} by default, unless we tell it not to
-.OBJDIR: .
-
-# We don't use any suffix rules
-.SUFFIXES:
-
-# GNU make has $^ for the full list of targets, while BSD make has $> and the
-# long-form ${.ALLSRC}.  We could write $^ $> to get them both, but that would
-# break if one of them implemented support for the other.  So instead, bring
-# BSD's ${.ALLSRC} to GNU.
-.ALLSRC ?= $^
-
-# GNU and BSD make have incompatible syntax for conditionals, but we can do a
-# lot with just recursive variable expansion.  Inspired by
-# https://github.com/wahern/autoguess
-TRUTHY,y := y
-TRUTHY,1 := y
-
-# Normalize ${V} to either "y" or ""
-IS_V := ${TRUTHY,${V}}
-
-# Suppress output unless V=1
-Q, := @
-Q  := ${Q,${IS_V}}
-
-# Show full commands with `make V=1`, otherwise short summaries
-MSG = @msg() { \
-          MSG="$$1"; \
-          shift; \
-          test "${IS_V}" || printf '%s\n' "$$MSG"; \
-          test "$${1:-}" || return 0; \
-          test "${IS_V}" && printf '%s\n' "$$*"; \
-          "$$@"; \
-      }; \
-      msg
-
-# Platform detection
-OS != uname
-ARCH != uname -m
-
-# For out-of-tree builds, e.g.
-#
-#     $ make config BUILDDIR=/path/to/build/dir
-#     $ make BUILDDIR=/path/to/build/dir
-BUILDDIR ?= .
-
-# Shorthand for build subdirectories
-BIN := ${BUILDDIR}/bin
-GEN := ${BUILDDIR}/gen
-OBJ := ${BUILDDIR}/obj
-
-# GNU make strips a leading ./ from target names, so do the same for BSD make
-BIN := ${BIN:./%=%}
-GEN := ${GEN:./%=%}
-OBJ := ${OBJ:./%=%}
-
-# Installation paths
-DESTDIR ?=
-PREFIX ?= /usr
-MANDIR ?= ${PREFIX}/share/man
-
-# Configurable executables; can be overridden with
-#
-#     $ make config CC=clang
-CC ?= cc
-INSTALL ?= install
-MKDIR ?= mkdir -p
-PKG_CONFIG ?= pkg-config
-RM ?= rm -f
-
-# Configurable flags
-
-CPPFLAGS ?=
-CFLAGS ?= \
-    -g \
-    -Wall \
-    -Wformat=2 \
-    -Werror=implicit \
-    -Wimplicit-fallthrough \
-    -Wmissing-declarations \
-    -Wshadow \
-    -Wsign-compare \
-    -Wstrict-prototypes
-LDFLAGS ?=
-LDLIBS ?=
-
-EXTRA_CPPFLAGS ?=
-EXTRA_CFLAGS ?=
-EXTRA_LDFLAGS ?=
-EXTRA_LDLIBS ?=
-
-GIT_VERSION != test -d .git && command -v git >/dev/null 2>&1 && git describe --always --dirty || echo 3.1.3
-VERSION ?= ${GIT_VERSION}
-
-# Immutable flags
-export BFS_CPPFLAGS= \
-    -D__EXTENSIONS__ \
-    -D_ATFILE_SOURCE \
-    -D_BSD_SOURCE \
-    -D_DARWIN_C_SOURCE \
-    -D_DEFAULT_SOURCE \
-    -D_GNU_SOURCE \
-    -D_LARGEFILE64_SOURCE \
-    -D_POSIX_PTHREAD_SEMANTICS \
-    -D_FILE_OFFSET_BITS=64 \
-    -D_TIME_BITS=64
-export BFS_CFLAGS= -std=c17 -pthread
-
-# Platform-specific system libraries
-LDLIBS,DragonFly := -lposix1e
-LDLIBS,Linux := -lrt
-LDLIBS,NetBSD := -lutil
-LDLIBS,SunOS := -lsocket -lnsl
-_BFS_LDLIBS := ${LDLIBS,${OS}}
-export BFS_LDLIBS=${_BFS_LDLIBS}
-
-# Build profiles
-ASAN ?= n
-LSAN ?= n
-MSAN ?= n
-TSAN ?= n
-UBSAN ?= n
-GCOV ?= n
-LINT ?= n
-RELEASE ?= n
-
-export ASAN_CFLAGS= -fsanitize=address
-export LSAN_CFLAGS= -fsanitize=leak
-export MSAN_CFLAGS= -fsanitize=memory -fsanitize-memory-track-origins
-export UBSAN_CFLAGS= -fsanitize=undefined
-
-# https://github.com/google/sanitizers/issues/342
-export TSAN_CPPFLAGS= -DBFS_USE_TARGET_CLONES=0
-export TSAN_CFLAGS= -fsanitize=thread
-
-export SAN=${ASAN}${LSAN}${MSAN}${TSAN}${UBSAN}
-export SAN_CFLAGS= -fno-sanitize-recover=all
-
-# MSAN and TSAN both need all code to be instrumented
-export NOLIBS= ${MSAN}${TSAN}
-
-# gcov only intercepts fork()/exec() with -std=gnu*
-export GCOV_CFLAGS= --coverage -std=gnu17
-
-export LINT_CPPFLAGS= -D_FORTIFY_SOURCE=3 -DBFS_LINT
-export LINT_CFLAGS= -Werror -O2
-
-export RELEASE_CPPFLAGS= -DNDEBUG
-export RELEASE_CFLAGS= -O3 -flto=auto
-
-# Save the new value of these variables, before they potentially get overridden
-# by `-include ${CONFIG}` below
-
-_XPREFIX := ${PREFIX}
-_XMANDIR := ${MANDIR}
-
-_XOS := ${OS}
-_XARCH := ${ARCH}
-
-_XCC := ${CC}
-_XINSTALL := ${INSTALL}
-_XMKDIR := ${MKDIR}
-_XRM := ${RM}
-
-_XCPPFLAGS := ${CPPFLAGS}
-_XCFLAGS := ${CFLAGS}
-_XLDFLAGS := ${LDFLAGS}
-_XLDLIBS := ${LDLIBS}
-
-# GNU make supports `export VAR`, but BSD make requires `export VAR=value`.
-# Sadly, GNU make gives a recursion error on `export VAR=${VAR}`.
-
-_BUILDDIR := ${BUILDDIR}
-_PKG_CONFIG := ${PKG_CONFIG}
-
-export BUILDDIR=${_BUILDDIR}
-export PKG_CONFIG=${_PKG_CONFIG}
-
-export XPREFIX=${_XPREFIX}
-export XMANDIR=${_XMANDIR}
-
-export XOS=${_XOS}
-export XARCH=${_XARCH}
-
-export XCC=${_XCC}
-export XINSTALL=${_XINSTALL}
-export XMKDIR=${_XMKDIR}
-export XRM=${_XRM}
-
-export XCPPFLAGS=${_XCPPFLAGS}
-export XCFLAGS=${_XCFLAGS}
-export XLDFLAGS=${_XLDFLAGS}
-export XLDLIBS=${_XLDLIBS}
-
-# The configuration file generated by `make config`
-CONFIG := ${GEN}/config.mk
+# Include the generated build config, if it exists
 -include ${CONFIG}
 
 ## Configuration phase (`make config`)
 
-# Makefile fragments generated by `make config`
-MKS := \
-    ${GEN}/vars.mk \
-    ${GEN}/deps.mk \
-    ${GEN}/objs.mk \
-    ${GEN}/pkgs.mk
-
-# cat a file if V=1
-VCAT,y := @cat
-VCAT,  := @:
-VCAT   := ${VCAT,${IS_V}}
-
 # The configuration goal itself
-config: ${MKS}
-	${MSG} "[ GEN] ${CONFIG}"
-	@printf 'include $${GEN}/%s\n' ${.ALLSRC:${GEN}/%=%} >${CONFIG}
-	${VCAT} ${CONFIG}
-.PHONY: config
-
-# Saves the configurable variables
-${GEN}/vars.mk:
-	@${XMKDIR} ${@D}
-	${MSG} "[ GEN] $@"
-	@config/vars.sh >$@
-	${VCAT} $@
-.PHONY: ${GEN}/vars.mk
-
-# Check for dependency generation support
-${GEN}/deps.mk: ${GEN}/vars.mk
-	${MSG} "[ GEN] $@"
-	@+${MAKE} -rs -f config/deps.mk TARGET=$@
-	${VCAT} $@
-	@printf -- '-include %s\n' ${OBJS:.o=.d} >>$@
-.PHONY: ${GEN}/deps.mk
-
-# Lists file.o: file.c dependencies
-${GEN}/objs.mk:
-	@${XMKDIR} ${@D}
-	${MSG} "[ GEN] $@"
-	@for obj in ${OBJS:${OBJ}/%.o=%}; do printf '$${OBJ}/%s.o: %s.c\n' "$$obj" "$$obj"; done >$@
-.PHONY: ${GEN}/objs.mk
-
-# External dependencies
-PKG_MKS := \
-    ${GEN}/libacl.mk \
-    ${GEN}/libcap.mk \
-    ${GEN}/libselinux.mk \
-    ${GEN}/liburing.mk \
-    ${GEN}/oniguruma.mk
-
-# Auto-detect dependencies and their build flags
-${GEN}/pkgs.mk: ${PKG_MKS}
-	${MSG} "[ GEN] $@"
-	@printf 'include $${GEN}/%s\n' ${.ALLSRC:${GEN}/%=%} >$@
-	@+${MAKE} -rs -f config/pkgs.mk TARGET=$@
-	${VCAT} $@
-.PHONY: ${GEN}/pkgs.mk
-
-# Auto-detect dependencies
-${PKG_MKS}: ${GEN}/vars.mk
-	@+${MAKE} -rs -f config/pkg.mk TARGET=$@
-	@if [ "${IS_V}" ]; then \
-	    cat $@; \
-	elif grep -q PKGS $@; then \
-	    printf '[ GEN] %-18s [y]\n' $@; \
-	else \
-	    printf '[ GEN] %-18s [n]\n' $@; \
-	fi
-.PHONY: ${PKG_MKS}
+config::
+	@+${MAKE} -sf config/config.mk
 
 # bfs used to have flag-like targets (`make release`, `make asan ubsan`, etc.).
 # Direct users to the new configuration system.
@@ -313,36 +55,6 @@ BINS := \
 all: ${BINS}
 .PHONY: all
 
-# All object files except the entry point
-LIBBFS := \
-    ${OBJ}/src/alloc.o \
-    ${OBJ}/src/bar.o \
-    ${OBJ}/src/bfstd.o \
-    ${OBJ}/src/bftw.o \
-    ${OBJ}/src/color.o \
-    ${OBJ}/src/ctx.o \
-    ${OBJ}/src/diag.o \
-    ${OBJ}/src/dir.o \
-    ${OBJ}/src/dstring.o \
-    ${OBJ}/src/eval.o \
-    ${OBJ}/src/exec.o \
-    ${OBJ}/src/expr.o \
-    ${OBJ}/src/fsade.o \
-    ${OBJ}/src/ioq.o \
-    ${OBJ}/src/mtab.o \
-    ${OBJ}/src/opt.o \
-    ${OBJ}/src/parse.o \
-    ${OBJ}/src/printf.o \
-    ${OBJ}/src/pwcache.o \
-    ${OBJ}/src/stat.o \
-    ${OBJ}/src/thread.o \
-    ${OBJ}/src/trie.o \
-    ${OBJ}/src/typo.o \
-    ${OBJ}/src/version.o \
-    ${OBJ}/src/xregex.o \
-    ${OBJ}/src/xspawn.o \
-    ${OBJ}/src/xtime.o
-
 # Group relevant flags together
 ALL_CFLAGS = ${CPPFLAGS} ${CFLAGS} ${DEPFLAGS}
 ALL_LDFLAGS = ${CFLAGS} ${LDFLAGS}
@@ -355,22 +67,6 @@ ${BINS}:
 	+${MSG} "[ LD ] $@" ${CC} ${ALL_LDFLAGS} ${.ALLSRC} ${LDLIBS} -o $@
 	${POSTLINK}
 
-# All object files
-OBJS := \
-    ${OBJ}/src/main.o \
-    ${OBJ}/tests/alloc.o \
-    ${OBJ}/tests/bfstd.o \
-    ${OBJ}/tests/bit.o \
-    ${OBJ}/tests/ioq.o \
-    ${OBJ}/tests/main.o \
-    ${OBJ}/tests/mksock.o \
-    ${OBJ}/tests/trie.o \
-    ${OBJ}/tests/xspawn.o \
-    ${OBJ}/tests/xspawnee.o \
-    ${OBJ}/tests/xtime.o \
-    ${OBJ}/tests/xtouch.o \
-    ${LIBBFS}
-
 # Get the .c file for a .o file
 CSRC = ${@:${OBJ}/%.o=%.c}
 
@@ -383,14 +79,20 @@ ${OBJS}: ${CONFIG}
 # Save the version number to this file, but only update VERSION if it changes
 ${GEN}/NEWVERSION::
 	@${MKDIR} ${@D}
-	@printf '%s\n' '${VERSION}' >$@
+	@if [ "$$VERSION" ]; then \
+	    printf '%s\n' "$$VERSION"; \
+	elif test -d .git && command -v git >/dev/null 2>&1; then \
+	    git describe --always --dirty; \
+	else \
+	    echo "3.1.3"; \
+	fi >$@
 
 ${GEN}/VERSION: ${GEN}/NEWVERSION
 	@test -e $@ && cmp -s $@ ${.ALLSRC} && rm ${.ALLSRC} || mv ${.ALLSRC} $@
 
 # Rebuild version.c whenever the version number changes
 ${OBJ}/src/version.o: ${GEN}/VERSION
-${OBJ}/src/version.o: CPPFLAGS := ${CPPFLAGS} -DBFS_VERSION='"${VERSION}"'
+${OBJ}/src/version.o: CPPFLAGS := ${CPPFLAGS} -DBFS_VERSION='"$$(cat ${GEN}/VERSION)"'
 
 ## Test phase (`make check`)
 
@@ -418,14 +120,7 @@ unit-tests: ${UTEST_BINS}
 .PHONY: unit-tests
 
 ${BIN}/tests/units: \
-    ${OBJ}/tests/alloc.o \
-    ${OBJ}/tests/bfstd.o \
-    ${OBJ}/tests/bit.o \
-    ${OBJ}/tests/ioq.o \
-    ${OBJ}/tests/main.o \
-    ${OBJ}/tests/trie.o \
-    ${OBJ}/tests/xspawn.o \
-    ${OBJ}/tests/xtime.o \
+    ${UNIT_OBJS} \
     ${LIBBFS}
 
 ${BIN}/tests/xspawnee: \
@@ -463,20 +158,20 @@ ${BIN}/tests/xtouch: \
     ${LIBBFS}
 
 # `make distcheck` configurations
-DISTCHECKS := distcheck-asan distcheck-tsan distcheck-release
-
-# Don't use msan on macOS
-IS_DARWIN,Darwin := y
-IS_DARWIN := ${IS_DARWIN,${OS}}
-DISTCHECK_MSAN, := distcheck-msan
-DISTCHECKS += ${DISTCHECK_MSAN,${IS_DARWIN}}
-
-# Only add a 32-bit build on 64-bit Linux
-DISTCHECK_M32,Linux,x86_64 := distcheck-m32
-DISTCHECKS += ${DISTCHECK_M32,${OS},${ARCH}}
+DISTCHECKS := \
+    distcheck-asan \
+    distcheck-msan \
+    distcheck-tsan \
+    distcheck-m32 \
+    distcheck-release
 
 # Test multiple configurations
-distcheck: ${DISTCHECKS}
+distcheck:
+	@+${MAKE} -s distcheck-asan
+	@+test "$$(uname)" = Darwin || ${MAKE} -s distcheck-msan
+	@+${MAKE} -s distcheck-tsan
+	@+test "$$(uname)-$$(uname -m)" != Linux-x86_64 || ${MAKE} -s distcheck-m32
+	@+${MAKE} -s distcheck-release
 .PHONY: distcheck
 
 # Per-distcheck configuration
@@ -530,9 +225,11 @@ check-install::
 
 # Clean all build products
 clean::
-	${RM} -r ${BIN} ${OBJ}
+	${MSG} "[ RM ] bin obj" \
+	    ${RM} -r ${BIN} ${OBJ}
 
 # Clean everything, including generated files
 distclean: clean
-	${RM} -r ${GEN} ${DISTCHECKS}
+	${MSG} "[ RM ] gen" \
+	    ${RM} -r ${GEN} ${DISTCHECKS}
 .PHONY: distclean
diff --git a/config/cc.sh b/config/cc.sh
index 2b340c0..abce508 100755
--- a/config/cc.sh
+++ b/config/cc.sh
@@ -7,4 +7,4 @@
 
 set -eux
 
-$CC $CPPFLAGS $CFLAGS $LDFLAGS "$@" $LDLIBS -o /dev/null
+$XCC $XCPPFLAGS $XCFLAGS $XLDFLAGS "$@" $XLDLIBS -o /dev/null
diff --git a/config/config.mk b/config/config.mk
new file mode 100644
index 0000000..c8d7f19
--- /dev/null
+++ b/config/config.mk
@@ -0,0 +1,77 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Makefile fragment that implements `make config`
+
+include config/prelude.mk
+include config/exports.mk
+
+# Makefile fragments generated by `make config`
+MKS := \
+    ${GEN}/vars.mk \
+    ${GEN}/flags.mk \
+    ${GEN}/deps.mk \
+    ${GEN}/objs.mk \
+    ${GEN}/pkgs.mk
+
+# The main configuration file, which includes the others
+${CONFIG}: ${MKS}
+	${MSG} "[ GEN] $@"
+	@printf '# %s\n' "$@" >$@
+	@printf 'include $${GEN}/%s\n' ${.ALLSRC:${GEN}/%=%} >>$@
+	${VCAT} ${CONFIG}
+.PHONY: ${CONFIG}
+
+# Saves the configurable variables
+${GEN}/vars.mk::
+	@${MKDIR} ${@D}
+	${MSG} "[ GEN] $@"
+	@printf '# %s\n' "$@" >$@
+	@printf 'PREFIX := %s\n' "$$XPREFIX" >>$@
+	@printf 'MANDIR := %s\n' "$$XMANDIR" >>$@
+	@printf 'OS := %s\n' "$${OS:-$$(uname)}" >>$@
+	@printf 'ARCH := %s\n' "$${ARCH:-$$(uname -m)}" >>$@
+	@printf 'CC := %s\n' "$$XCC" >>$@
+	@printf 'INSTALL := %s\n' "$$XINSTALL" >>$@
+	@printf 'MKDIR := %s\n' "$$XMKDIR" >>$@
+	@printf 'RM := %s\n' "$$XRM" >>$@
+	@printf 'PKGS :=\n' >>$@
+	${VCAT} $@
+
+# Sets the build flags.  This depends on vars.mk and uses a recursive make so
+# that the default flags can depend on variables like ${OS}.
+${GEN}/flags.mk: ${GEN}/vars.mk
+	@+${MAKE} -sf config/flags.mk
+.PHONY: ${GEN}/flags.mk
+
+# Check for dependency generation support
+${GEN}/deps.mk: ${GEN}/flags.mk
+	@+${MAKE} -sf config/deps.mk
+.PHONY: ${GEN}/deps.mk
+
+# Lists file.o: file.c dependencies
+${GEN}/objs.mk::
+	@${MKDIR} ${@D}
+	${MSG} "[ GEN] $@"
+	@printf '# %s\n' "$@" >$@
+	@for obj in ${OBJS:${OBJ}/%.o=%}; do printf '$${OBJ}/%s.o: %s.c\n' "$$obj" "$$obj"; done >>$@
+
+# External dependencies
+PKG_MKS := \
+    ${GEN}/libacl.mk \
+    ${GEN}/libcap.mk \
+    ${GEN}/libselinux.mk \
+    ${GEN}/liburing.mk \
+    ${GEN}/oniguruma.mk
+
+# Auto-detect dependencies and their build flags
+${GEN}/pkgs.mk: ${PKG_MKS}
+	@printf '# %s\n' "$@" >$@
+	@printf 'include $${GEN}/%s\n' ${.ALLSRC:${GEN}/%=%} >>$@
+	@+${MAKE} -sf config/pkgs.mk
+.PHONY: ${GEN}/pkgs.mk
+
+# Auto-detect dependencies
+${PKG_MKS}: ${GEN}/flags.mk
+	@+${MAKE} -sf config/pkg.mk TARGET=$@
+.PHONY: ${PKG_MKS}
diff --git a/config/deps.mk b/config/deps.mk
index 7d991ab..52ee0e1 100644
--- a/config/deps.mk
+++ b/config/deps.mk
@@ -3,11 +3,16 @@
 
 # Makefile that generates gen/deps.mk
 
-.OBJDIR: .
+include config/prelude.mk
+include ${GEN}/vars.mk
+include ${GEN}/flags.mk
+include config/exports.mk
 
-include config/vars.mk
-
-default::
+${GEN}/deps.mk::
+	${MSG} "[ GEN] $@"
+	printf '# %s\n' "$@" >$@
 	if config/cc.sh -MD -MP -MF /dev/null config/empty.c; then \
 	    printf 'DEPFLAGS = -MD -MP -MF $${@:.o=.d}\n'; \
-	fi >${TARGET} 2>${TARGET}.log
+	fi >>$@ 2>$@.log
+	${VCAT} $@
+	@printf -- '-include %s\n' ${OBJS:.o=.d} >>$@
diff --git a/config/exports.mk b/config/exports.mk
new file mode 100644
index 0000000..9128568
--- /dev/null
+++ b/config/exports.mk
@@ -0,0 +1,19 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Makefile fragment that exports variables used by configuration scripts
+
+export XPREFIX=${PREFIX}
+export XMANDIR=${MANDIR}
+
+export XCC=${CC}
+export XINSTALL=${INSTALL}
+export XMKDIR=${MKDIR}
+export XRM=${RM}
+
+export XCPPFLAGS=${CPPFLAGS}
+export XCFLAGS=${CFLAGS}
+export XLDFLAGS=${LDFLAGS}
+export XLDLIBS=${LDLIBS}
+
+export XNOLIBS=${NOLIBS}
diff --git a/config/flags.mk b/config/flags.mk
new file mode 100644
index 0000000..e62e26e
--- /dev/null
+++ b/config/flags.mk
@@ -0,0 +1,119 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Makefile that generates gen/flags.mk
+
+include config/prelude.mk
+include ${GEN}/vars.mk
+
+# Immutable flags
+export BFS_CPPFLAGS= \
+    -D__EXTENSIONS__ \
+    -D_ATFILE_SOURCE \
+    -D_BSD_SOURCE \
+    -D_DARWIN_C_SOURCE \
+    -D_DEFAULT_SOURCE \
+    -D_GNU_SOURCE \
+    -D_LARGEFILE64_SOURCE \
+    -D_POSIX_PTHREAD_SEMANTICS \
+    -D_FILE_OFFSET_BITS=64 \
+    -D_TIME_BITS=64
+export BFS_CFLAGS= -std=c17 -pthread
+
+# Platform-specific system libraries
+LDLIBS,DragonFly := -lposix1e
+LDLIBS,Linux := -lrt
+LDLIBS,NetBSD := -lutil
+LDLIBS,SunOS := -lsocket -lnsl
+export BFS_LDLIBS=${LDLIBS,${OS}}
+
+# Make sure we pick up any default flags from e.g. sys.mk
+export XCPPFLAGS=${CPPFLAGS}
+export XCFLAGS=${CFLAGS}
+export XLDFLAGS=${LDFLAGS}
+export XLDLIBS=${LDLIBS}
+
+# Build profiles
+_ASAN := ${TRUTHY,${ASAN}}
+_LSAN := ${TRUTHY,${LSAN}}
+_MSAN := ${TRUTHY,${MSAN}}
+_TSAN := ${TRUTHY,${TSAN}}
+_UBSAN := ${TRUTHY,${UBSAN}}
+_GCOV := ${TRUTHY,${GCOV}}
+_LINT := ${TRUTHY,${LINT}}
+_RELEASE := ${TRUTHY,${RELEASE}}
+
+# https://github.com/google/sanitizers/issues/342
+TSAN_CPPFLAGS,y := -DBFS_USE_TARGET_CLONES=0
+export TSAN_CPPFLAGS=${TSAN_CPPFLAGS,${_TSAN}}
+
+ASAN_CFLAGS,y := -fsanitize=address
+LSAN_CFLAGS,y := -fsanitize=leak
+MSAN_CFLAGS,y := -fsanitize=memory -fsanitize-memory-track-origins
+TSAN_CFLAGS,y := -fsanitize=thread
+UBSAN_CFLAGS.y := -fsanitize=undefined
+
+export ASAN_CFLAGS=${ASAN_CFLAGS,${_ASAN}}
+export LSAN_CFLAGS=${LSAN_CFLAGS,${_LSAN}}
+export MSAN_CFLAGS=${MSAN_CFLAGS,${_MSAN}}
+export TSAN_CFLAGS=${TSAN_CFLAGS,${_TSAN}}
+export UBSAN_CFLAGS=${UBSAN_CFLAGS,${_UBSAN}}
+
+SAN_CFLAGS,y := -fno-sanitize-recover=all
+SAN := ${NOT,${NOR,${_ASAN},${_LSAN},${_MSAN},${_TSAN},${_UBSAN}}}
+export SAN_CFLAGS=${SAN_CFLAGS,${SAN}}
+
+# MSAN and TSAN both need all code to be instrumented
+NOLIBS ?= ${NOT,${NOR,${_MSAN},${_TSAN}}}
+export XNOLIBS=${NOLIBS}
+
+# gcov only intercepts fork()/exec() with -std=gnu*
+GCOV_CFLAGS,y := -std=gnu17 --coverage
+export GCOV_CFLAGS=${GCOV_CFLAGS,${_GCOV}}
+
+LINT_CPPFLAGS,y := -D_FORTIFY_SOURCE=3 -DBFS_LINT
+LINT_CFLAGS,y := -Werror -O2
+
+export LINT_CPPFLAGS=${LINT_CPPFLAGS,${_LINT}}
+export LINT_CFLAGS=${LINT_CFLAGS,${_LINT}}
+
+RELEASE_CPPFLAGS,y := -DNDEBUG
+RELEASE_CFLAGS,y := -O3 -flto=auto
+
+export RELEASE_CPPFLAGS=${RELEASE_CPPFLAGS,${_RELEASE}}
+export RELEASE_CFLAGS=${RELEASE_CFLAGS,${_RELEASE}}
+
+# Set a variable
+SETVAR = printf '%s := %s\n' >>$@
+
+# Append to a variable, if non-empty
+APPEND = append() { test -z "$$2" || printf '%s += %s\n' "$$1" "$$2" >>$@; }; append
+
+${GEN}/flags.mk::
+	${MSG} "[ GEN] $@"
+	printf '# %s\n' "$@" >$@
+	${SETVAR} CPPFLAGS "$$BFS_CPPFLAGS"
+	${APPEND} CPPFLAGS "$$TSAN_CPPFLAGS"
+	${APPEND} CPPFLAGS "$$LINT_CPPFLAGS"
+	${APPEND} CPPFLAGS "$$RELEASE_CPPFLAGS"
+	${APPEND} CPPFLAGS "$$XCPPFLAGS"
+	${APPEND} CPPFLAGS "$$EXTRA_CPPFLAGS"
+	${SETVAR} CFLAGS "$$BFS_CFLAGS"
+	${APPEND} CFLAGS "$$ASAN_CFLAGS"
+	${APPEND} CFLAGS "$$LSAN_CFLAGS"
+	${APPEND} CFLAGS "$$MSAN_CFLAGS"
+	${APPEND} CFLAGS "$$TSAN_CFLAGS"
+	${APPEND} CFLAGS "$$UBSAN_CFLAGS"
+	${APPEND} CFLAGS "$$SAN_CFLAGS"
+	${APPEND} CFLAGS "$$GCOV_CFLAGS"
+	${APPEND} CFLAGS "$$LINT_CFLAGS"
+	${APPEND} CFLAGS "$$RELEASE_CFLAGS"
+	${APPEND} CFLAGS "$$XCFLAGS"
+	${APPEND} CFLAGS "$$EXTRA_CFLAGS"
+	${SETVAR} LDFLAGS "$$XLDFLAGS"
+	${SETVAR} LDLIBS "$$XLDLIBS"
+	${APPEND} LDLIBS "$$EXTRA_LDLIBS"
+	${APPEND} LDLIBS "$$BFS_LDLIBS"
+	${SETVAR} NOLIBS "$$XNOLIBS"
+	test "${OS}-${SAN}" != FreeBSD-y || printf 'POSTLINK = elfctl -e +noaslr $$@\n' >>$@
+	${VCAT} $@
diff --git a/config/pkg.mk b/config/pkg.mk
index 9b32b42..2086555 100644
--- a/config/pkg.mk
+++ b/config/pkg.mk
@@ -3,9 +3,18 @@
 
 # Makefile that generates gen/lib*.mk
 
-.OBJDIR: .
-
-include config/vars.mk
+include config/prelude.mk
+include ${GEN}/vars.mk
+include ${GEN}/flags.mk
+include config/exports.mk
 
 default::
-	config/pkg.sh ${TARGET:${GEN}/%.mk=%} >${TARGET} 2>${TARGET}.log
+	@printf '# %s\n' "${TARGET}" >${TARGET}
+	config/pkg.sh ${TARGET:${GEN}/%.mk=%} >>${TARGET} 2>${TARGET}.log
+	@if [ "${IS_V}" ]; then \
+	    cat ${TARGET}; \
+	elif grep -q PKGS ${TARGET}; then \
+	    printf '[ GEN] %-18s [y]\n' ${TARGET}; \
+	else \
+	    printf '[ GEN] %-18s [n]\n' ${TARGET}; \
+	fi
diff --git a/config/pkgconf.sh b/config/pkgconf.sh
index a13b30f..80dcbee 100755
--- a/config/pkgconf.sh
+++ b/config/pkgconf.sh
@@ -17,29 +17,29 @@ if (($# < 1)); then
     exit
 fi
 
-if [[ "$NOLIBS" == *y* ]]; then
+if [[ "$XNOLIBS" == *y* ]]; then
     exit 1
 fi
 
-if command -v "${PKG_CONFIG:-}" &>/dev/null; then
+if command -v "${XPKG_CONFIG:-}" &>/dev/null; then
     case "$MODE" in
         "")
-            "$PKG_CONFIG" "$@"
+            "$XPKG_CONFIG" "$@"
             ;;
         --cflags)
-            OUT=$("$PKG_CONFIG" --cflags "$@")
+            OUT=$("$XPKG_CONFIG" --cflags "$@")
             if [ "$OUT" ]; then
                 printf 'CFLAGS += %s\n' "$OUT"
             fi
             ;;
         --ldflags)
-            OUT=$("$PKG_CONFIG" --libs-only-L --libs-only-other "$@")
+            OUT=$("$XPKG_CONFIG" --libs-only-L --libs-only-other "$@")
             if [ "$OUT" ]; then
                 printf 'LDFLAGS += %s\n' "$OUT"
             fi
             ;;
         --ldlibs)
-            OUT=$("$PKG_CONFIG" --libs-only-l "$@")
+            OUT=$("$XPKG_CONFIG" --libs-only-l "$@")
             if [ "$OUT" ]; then
                 printf 'LDLIBS := %s ${LDLIBS}\n' "$OUT"
             fi
diff --git a/config/pkgs.mk b/config/pkgs.mk
index 54024b2..5ebbaec 100644
--- a/config/pkgs.mk
+++ b/config/pkgs.mk
@@ -3,12 +3,15 @@
 
 # Makefile that generates gen/pkgs.mk
 
-.OBJDIR: .
-
-include config/vars.mk
+include config/prelude.mk
+include ${GEN}/vars.mk
+include ${GEN}/flags.mk
 include ${GEN}/pkgs.mk
+include config/exports.mk
 
-default::
-	config/pkgconf.sh --cflags ${PKGS} >>${TARGET} 2>>${TARGET}.log
-	config/pkgconf.sh --ldflags ${PKGS} >>${TARGET} 2>>${TARGET}.log
-	config/pkgconf.sh --ldlibs ${PKGS} >>${TARGET} 2>>${TARGET}.log
+${GEN}/pkgs.mk::
+	${MSG} "[ GEN] $@"
+	config/pkgconf.sh --cflags ${PKGS} >>$@ 2>>$@.log
+	config/pkgconf.sh --ldflags ${PKGS} >>$@ 2>>$@.log
+	config/pkgconf.sh --ldlibs ${PKGS} >>$@ 2>>$@.log
+	${VCAT} $@
diff --git a/config/prelude.mk b/config/prelude.mk
new file mode 100644
index 0000000..1d5fb83
--- /dev/null
+++ b/config/prelude.mk
@@ -0,0 +1,164 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Common makefile utilities.  Compatible with both GNU make and most BSD makes.
+
+# BSD make will chdir into ${.OBJDIR} by default, unless we tell it not to
+.OBJDIR: .
+
+# We don't use any suffix rules
+.SUFFIXES:
+
+# GNU make has $^ for the full list of targets, while BSD make has $> and the
+# long-form ${.ALLSRC}.  We could write $^ $> to get them both, but that would
+# break if one of them implemented support for the other.  So instead, bring
+# BSD's ${.ALLSRC} to GNU.
+.ALLSRC ?= $^
+
+# For out-of-tree builds, e.g.
+#
+#     $ make config BUILDDIR=/path/to/build/dir
+#     $ make BUILDDIR=/path/to/build/dir
+BUILDDIR ?= .
+
+# Shorthand for build subdirectories
+BIN := ${BUILDDIR}/bin
+GEN := ${BUILDDIR}/gen
+OBJ := ${BUILDDIR}/obj
+
+# GNU make strips a leading ./ from target names, so do the same for BSD make
+BIN := ${BIN:./%=%}
+GEN := ${GEN:./%=%}
+OBJ := ${OBJ:./%=%}
+
+# The configuration file generated by `make config`
+CONFIG := ${GEN}/config.mk
+
+# Installation paths
+DESTDIR ?=
+PREFIX ?= /usr
+MANDIR ?= ${PREFIX}/share/man
+
+# GNU make supports `export VAR`, but BSD make requires `export VAR=value`.
+# Sadly, GNU make gives a recursion error on `export VAR=${VAR}`.
+_BUILDDIR := ${BUILDDIR}
+export BUILDDIR=${_BUILDDIR}
+
+# Configurable executables; can be overridden with
+#
+#     $ make config CC=clang
+CC ?= cc
+INSTALL ?= install
+MKDIR ?= mkdir -p
+PKG_CONFIG ?= pkg-config
+RM ?= rm -f
+
+# GNU and BSD make have incompatible syntax for conditionals, but we can do a
+# lot with just nested variable expansion.  We use "y" as the canonical
+# truthy value, and "" (the empty string) as the canonical falsey value.
+#
+# To normalize a boolean, use ${TRUTHY,${VAR}}, which expands like this:
+#
+#     VAR=y      ${TRUTHY,${VAR}} => ${TRUTHY,y}     => y
+#     VAR=1      ${TRUTHY,${VAR}} => ${TRUTHY,1}     => y
+#     VAR=n      ${TRUTHY,${VAR}} => ${TRUTHY,n}     =>   [empty]
+#     VAR=other  ${TRUTHY,${VAR}} => ${TRUTHY,other} =>   [empty]
+#     VAR=       ${TRUTHY,${VAR}} => ${TRUTHY,}      =>   [emtpy]
+#
+# Inspired by https://github.com/wahern/autoguess
+TRUTHY,y := y
+TRUTHY,1 := y
+
+# Boolean operators are also implemented with nested expansion
+NOT,y :=
+NOT,  := y
+
+# Support up to 5 arguments
+AND,y         := y
+AND,y,y       := y
+AND,y,y,y     := y
+AND,y,y,y,y   := y
+AND,y,y,y,y,y := y
+
+# NOR can be defined without combinatorial explosion.
+# OR is just ${NOT,${NOR,...}}
+NOR,     := y
+NOR,,    := y
+NOR,,,   := y
+NOR,,,,  := y
+NOR,,,,, := y
+
+# Normalize ${V} to either "y" or ""
+IS_V := ${TRUTHY,${V}}
+
+# Suppress output unless V=1
+Q, := @
+Q  := ${Q,${IS_V}}
+
+# Show full commands with `make V=1`, otherwise short summaries
+MSG = @msg() { \
+          MSG="$$1"; \
+          shift; \
+          test "${IS_V}" || printf '%s\n' "$$MSG"; \
+          test "$${1:-}" || return 0; \
+          test "${IS_V}" && printf '%s\n' "$$*"; \
+          "$$@"; \
+      }; \
+      msg
+
+# cat a file if V=1
+VCAT,y := @cat
+VCAT,  := @:
+VCAT   := ${VCAT,${IS_V}}
+
+# List all object files here, as they're needed by both `make config` and `make`
+
+# All object files except the entry point
+LIBBFS := \
+    ${OBJ}/src/alloc.o \
+    ${OBJ}/src/bar.o \
+    ${OBJ}/src/bfstd.o \
+    ${OBJ}/src/bftw.o \
+    ${OBJ}/src/color.o \
+    ${OBJ}/src/ctx.o \
+    ${OBJ}/src/diag.o \
+    ${OBJ}/src/dir.o \
+    ${OBJ}/src/dstring.o \
+    ${OBJ}/src/eval.o \
+    ${OBJ}/src/exec.o \
+    ${OBJ}/src/expr.o \
+    ${OBJ}/src/fsade.o \
+    ${OBJ}/src/ioq.o \
+    ${OBJ}/src/mtab.o \
+    ${OBJ}/src/opt.o \
+    ${OBJ}/src/parse.o \
+    ${OBJ}/src/printf.o \
+    ${OBJ}/src/pwcache.o \
+    ${OBJ}/src/stat.o \
+    ${OBJ}/src/thread.o \
+    ${OBJ}/src/trie.o \
+    ${OBJ}/src/typo.o \
+    ${OBJ}/src/version.o \
+    ${OBJ}/src/xregex.o \
+    ${OBJ}/src/xspawn.o \
+    ${OBJ}/src/xtime.o
+
+# Unit test objects
+UNIT_OBJS := \
+    ${OBJ}/tests/alloc.o \
+    ${OBJ}/tests/bfstd.o \
+    ${OBJ}/tests/bit.o \
+    ${OBJ}/tests/ioq.o \
+    ${OBJ}/tests/main.o \
+    ${OBJ}/tests/trie.o \
+    ${OBJ}/tests/xspawn.o \
+    ${OBJ}/tests/xtime.o
+
+# All object files
+OBJS := \
+    ${OBJ}/src/main.o \
+    ${OBJ}/tests/mksock.o \
+    ${OBJ}/tests/xspawnee.o \
+    ${OBJ}/tests/xtouch.o \
+    ${LIBBFS} \
+    ${UNIT_OBJS}
diff --git a/config/vars.mk b/config/vars.mk
deleted file mode 100644
index a8fae9d..0000000
--- a/config/vars.mk
+++ /dev/null
@@ -1,21 +0,0 @@
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Makefile fragment loads and exports variables for config steps
-
-GEN := ${BUILDDIR}/gen
-GEN := ${GEN:./%=%}
-
-include ${GEN}/vars.mk
-
-_CC := ${CC}
-_CPPFLAGS := ${CPPFLAGS}
-_CFLAGS := ${CFLAGS}
-_LDFLAGS := ${LDFLAGS}
-_LDLIBS := ${LDLIBS}
-
-export CC=${_CC}
-export CPPFLAGS=${_CPPFLAGS}
-export CFLAGS=${_CFLAGS}
-export LDFLAGS=${_LDFLAGS}
-export LDLIBS=${_LDLIBS}
diff --git a/config/vars.sh b/config/vars.sh
deleted file mode 100755
index 8a781bb..0000000
--- a/config/vars.sh
+++ /dev/null
@@ -1,81 +0,0 @@
-#!/usr/bin/env bash
-
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Writes the saved variables to gen/vars.mk
-
-set -eu
-
-print() {
-    NAME="$1"
-    OP="${2:-:=}"
-
-    if (($# >= 3)); then
-        printf '# %s\n' "${3#X}"
-        declare -n VAR="$3"
-        VALUE="${VAR:-}"
-    else
-        # Try X$NAME, $NAME, ""
-        local -n XVAR="X$NAME"
-        local -n VAR="$NAME"
-        VALUE="${XVAR:-${VAR:-}}"
-    fi
-
-    printf '%s %s %s\n' "$NAME" "$OP" "$VALUE"
-}
-
-cond_flags() {
-    local -n COND="$1"
-
-    if [[ "${COND:-}" == *y* ]]; then
-        print "$2" += "${1}_${2}"
-    fi
-}
-
-print PREFIX
-print MANDIR
-
-print OS
-print ARCH
-
-print CC
-print INSTALL
-print MKDIR
-print RM
-
-print CPPFLAGS := BFS_CPPFLAGS
-cond_flags TSAN CPPFLAGS
-cond_flags LINT CPPFLAGS
-cond_flags RELEASE CPPFLAGS
-print CPPFLAGS += XCPPFLAGS
-print CPPFLAGS += EXTRA_CPPFLAGS
-
-print CFLAGS := BFS_CFLAGS
-cond_flags ASAN CFLAGS
-cond_flags LSAN CFLAGS
-cond_flags MSAN CFLAGS
-cond_flags TSAN CFLAGS
-cond_flags UBSAN CFLAGS
-cond_flags SAN CFLAGS
-cond_flags GCOV CFLAGS
-cond_flags LINT CFLAGS
-cond_flags RELEASE CFLAGS
-print CFLAGS += XCFLAGS
-print CFLAGS += EXTRA_CFLAGS
-
-print LDFLAGS := XLDFLAGS
-print LDFLAGS += EXTRA_LDFLAGS
-
-print LDLIBS := XLDLIBS
-print LDLIBS += EXTRA_LDLIBS
-print LDLIBS += BFS_LDLIBS
-
-print PKGS
-
-# Disable ASLR on FreeBSD when sanitizers are enabled
-case "$XOS-$SAN" in
-    FreeBSD-*y*)
-        printf 'POSTLINK = elfctl -e +noaslr $@\n'
-        ;;
-esac
-- 
cgit v1.2.3


From 1ab3bd78be97357ed1470ca7beee178260d3f657 Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Mon, 22 Apr 2024 14:26:24 -0400
Subject: ci/freebsd: Use cross-platform-actions

---
 .github/workflows/ci.yml | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3ad924f..bd10df8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,27 +69,21 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Run tests
-        uses: vmactions/freebsd-vm@v1
+        uses: cross-platform-actions/action@v0.24.0
         with:
-          release: "14.0"
-          usesh: true
-          copyback: false
+          operating_system: freebsd
+          version: "14.0"
+          sync_files: runner-to-vm
 
-          prepare: |
-            pkg install -y \
+          run: |
+            sudo pkg install -y \
                 bash \
                 expect \
                 oniguruma \
                 pkgconf \
-                sudo \
                 tcl-wrapper
-            pw useradd -n action -m -G wheel -s /usr/local/bin/bash
-            echo "%wheel ALL=(ALL) NOPASSWD: ALL" >>/usr/local/etc/sudoers
-            mount -t fdescfs none /dev/fd
-
-          run: |
-            chown -R action:action .
-            sudo -u action make -j$(nproc) distcheck
+            sudo mount -t fdescfs none /dev/fd
+            make -j$(nproc) distcheck
 
   openbsd:
     name: OpenBSD
-- 
cgit v1.2.3


From beff30d84fd89c52754091055868efb868356e5d Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Mon, 22 Apr 2024 14:30:37 -0400
Subject: ci/openbsd: Use cross-platform-actions

---
 .github/workflows/ci.yml | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bd10df8..b977580 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -94,27 +94,21 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Run tests
-        uses: vmactions/openbsd-vm@v1
+        uses: cross-platform-actions/action@v0.24.0
         with:
-          release: "7.5"
-          usesh: true
-          copyback: false
+          operating_system: openbsd
+          version: "7.5"
+          sync_files: runner-to-vm
 
-          prepare: |
-            pkg_add \
+          run: |
+            sudo pkg_add \
                 bash \
                 expect \
                 gmake \
                 oniguruma
-            adduser -group USER -batch action wheel >/etc/doas.conf
-
-          run: |
-            chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
-            doas -u action gmake config
-            doas -u action gmake -j$jobs check TEST_FLAGS="--sudo=doas --verbose=skipped"
+            gmake -j$jobs config
+            gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
   netbsd:
     name: NetBSD
-- 
cgit v1.2.3


From 19a640cc3b274ad58194f156a7a7aa0f96c7179e Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Mon, 22 Apr 2024 14:41:20 -0400
Subject: ci/netbsd: Use cross-platform-actions

---
 .github/workflows/ci.yml | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b977580..3890bb0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -119,30 +119,22 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Run tests
-        uses: vmactions/netbsd-vm@v1
+        uses: cross-platform-actions/action@v0.24.0
         with:
-          release: "10.0"
-          usesh: true
-          copyback: false
+          operating_system: netbsd
+          version: "10.0"
+          sync_files: runner-to-vm
 
-          prepare: |
+          run: |
             PATH="/sbin:/usr/sbin:$PATH"
-            pkg_add \
+            sudo pkgin -y install \
                 bash \
-                clang \
                 oniguruma \
                 pkgconf \
-                sudo \
                 tcl-expect
-            useradd -m -G wheel -g =uid action
-            echo "%wheel ALL=(ALL) NOPASSWD: ALL" >>/usr/pkg/etc/sudoers
-
-          run: |
-            PATH="/sbin:/usr/sbin:$PATH"
-            chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
-            sudo -u action make config CC=clang
-            sudo -u action make -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
+            make -j$jobs config
+            make -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
   dragonflybsd:
     name: DragonFly BSD
-- 
cgit v1.2.3


From 37caa3d71fd8bb4d0d9204e4a2f5cac234fa25fd Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Mon, 29 Apr 2024 15:30:39 -0400
Subject: build: Replace `make config` with a `./configure` script

This lets us do more traditional out-of-tree builds like

    $ ../path/to/bfs/configure
    $ make

The .mk files are moved from ./config to ./build, mostly so that
./configure will auto-complete easily.
---
 .github/workflows/ci.yml              |   8 +-
 .github/workflows/codecov.yml         |   2 +-
 .github/workflows/codeql.yml          |   2 +-
 Makefile                              | 143 +++++++++++++++---------------
 README.md                             |   4 +-
 bench/bench.sh                        |   6 +-
 build/cc.sh                           |  16 ++++
 build/config.mk                       |  62 +++++++++++++
 build/define-if.sh                    |  20 +++++
 build/deps.mk                         |  18 ++++
 build/empty.c                         |   6 ++
 build/exports.mk                      |  20 +++++
 build/flags.mk                        | 136 ++++++++++++++++++++++++++++
 build/has/acl-get-entry.c             |   8 ++
 build/has/acl-get-file.c              |   8 ++
 build/has/acl-get-tag-type.c          |  10 +++
 build/has/acl-is-trivial-np.c         |  12 +++
 build/has/acl-trivial.c               |   8 ++
 build/has/aligned-alloc.c             |   8 ++
 build/has/confstr.c                   |   9 ++
 build/has/extattr-get-file.c          |  10 +++
 build/has/extattr-get-link.c          |  10 +++
 build/has/extattr-list-file.c         |  10 +++
 build/has/extattr-list-link.c         |  10 +++
 build/has/fdclosedir.c                |   8 ++
 build/has/getdents.c                  |  10 +++
 build/has/getdents64-syscall.c        |  12 +++
 build/has/getdents64.c                |  10 +++
 build/has/getprogname-gnu.c           |   9 ++
 build/has/getprogname.c               |   9 ++
 build/has/max-align-t.c               |   8 ++
 build/has/pipe2.c                     |  10 +++
 build/has/posix-spawn-addfchdir-np.c  |  11 +++
 build/has/posix-spawn-addfchdir.c     |  11 +++
 build/has/st-acmtim.c                 |  12 +++
 build/has/st-acmtimespec.c            |  12 +++
 build/has/st-birthtim.c               |   9 ++
 build/has/st-birthtimespec.c          |   9 ++
 build/has/st-flags.c                  |   9 ++
 build/has/statx-syscall.c             |  13 +++
 build/has/statx.c                     |  11 +++
 build/has/strerror-l.c                |  11 +++
 build/has/strerror-r-gnu.c            |  11 +++
 build/has/strerror-r-posix.c          |  11 +++
 build/has/tm-gmtoff.c                 |   9 ++
 build/has/uselocale.c                 |   9 ++
 build/header.mk                       |  69 +++++++++++++++
 build/pkgconf.sh                      | 100 +++++++++++++++++++++
 build/pkgs.mk                         |  36 ++++++++
 build/prelude.mk                      | 133 ++++++++++++++++++++++++++++
 build/use/libacl.c                    |   9 ++
 build/use/libcap.c                    |   9 ++
 build/use/libselinux.c                |   9 ++
 build/use/liburing.c                  |   9 ++
 build/use/oniguruma.c                 |   9 ++
 config/cc.sh                          |  16 ----
 config/config.mk                      |  63 -------------
 config/define-if.sh                   |  20 -----
 config/deps.mk                        |  18 ----
 config/empty.c                        |   6 --
 config/exports.mk                     |  20 -----
 config/flags.mk                       | 136 ----------------------------
 config/has/acl-get-entry.c            |   8 --
 config/has/acl-get-file.c             |   8 --
 config/has/acl-get-tag-type.c         |  10 ---
 config/has/acl-is-trivial-np.c        |  12 ---
 config/has/acl-trivial.c              |   8 --
 config/has/aligned-alloc.c            |   8 --
 config/has/confstr.c                  |   9 --
 config/has/extattr-get-file.c         |  10 ---
 config/has/extattr-get-link.c         |  10 ---
 config/has/extattr-list-file.c        |  10 ---
 config/has/extattr-list-link.c        |  10 ---
 config/has/fdclosedir.c               |   8 --
 config/has/getdents.c                 |  10 ---
 config/has/getdents64-syscall.c       |  12 ---
 config/has/getdents64.c               |  10 ---
 config/has/getprogname-gnu.c          |   9 --
 config/has/getprogname.c              |   9 --
 config/has/max-align-t.c              |   8 --
 config/has/pipe2.c                    |  10 ---
 config/has/posix-spawn-addfchdir-np.c |  11 ---
 config/has/posix-spawn-addfchdir.c    |  11 ---
 config/has/st-acmtim.c                |  12 ---
 config/has/st-acmtimespec.c           |  12 ---
 config/has/st-birthtim.c              |   9 --
 config/has/st-birthtimespec.c         |   9 --
 config/has/st-flags.c                 |   9 --
 config/has/statx-syscall.c            |  13 ---
 config/has/statx.c                    |  11 ---
 config/has/strerror-l.c               |  11 ---
 config/has/strerror-r-gnu.c           |  11 ---
 config/has/strerror-r-posix.c         |  11 ---
 config/has/tm-gmtoff.c                |   9 --
 config/has/uselocale.c                |   9 --
 config/header.mk                      |  69 ---------------
 config/pkgconf.sh                     | 100 ---------------------
 config/pkgs.mk                        |  36 --------
 config/prelude.mk                     | 162 ----------------------------------
 config/use/libacl.c                   |   9 --
 config/use/libcap.c                   |   9 --
 config/use/libselinux.c               |   9 --
 config/use/liburing.c                 |   9 --
 config/use/oniguruma.c                |   9 --
 configure                             |  98 ++++++++++++++++++++
 docs/BUILDING.md                      |  47 +++++-----
 tests/util.sh                         |   9 +-
 tests/xspawn.c                        |  15 +---
 108 files changed, 1199 insertions(+), 1141 deletions(-)
 create mode 100755 build/cc.sh
 create mode 100644 build/config.mk
 create mode 100755 build/define-if.sh
 create mode 100644 build/deps.mk
 create mode 100644 build/empty.c
 create mode 100644 build/exports.mk
 create mode 100644 build/flags.mk
 create mode 100644 build/has/acl-get-entry.c
 create mode 100644 build/has/acl-get-file.c
 create mode 100644 build/has/acl-get-tag-type.c
 create mode 100644 build/has/acl-is-trivial-np.c
 create mode 100644 build/has/acl-trivial.c
 create mode 100644 build/has/aligned-alloc.c
 create mode 100644 build/has/confstr.c
 create mode 100644 build/has/extattr-get-file.c
 create mode 100644 build/has/extattr-get-link.c
 create mode 100644 build/has/extattr-list-file.c
 create mode 100644 build/has/extattr-list-link.c
 create mode 100644 build/has/fdclosedir.c
 create mode 100644 build/has/getdents.c
 create mode 100644 build/has/getdents64-syscall.c
 create mode 100644 build/has/getdents64.c
 create mode 100644 build/has/getprogname-gnu.c
 create mode 100644 build/has/getprogname.c
 create mode 100644 build/has/max-align-t.c
 create mode 100644 build/has/pipe2.c
 create mode 100644 build/has/posix-spawn-addfchdir-np.c
 create mode 100644 build/has/posix-spawn-addfchdir.c
 create mode 100644 build/has/st-acmtim.c
 create mode 100644 build/has/st-acmtimespec.c
 create mode 100644 build/has/st-birthtim.c
 create mode 100644 build/has/st-birthtimespec.c
 create mode 100644 build/has/st-flags.c
 create mode 100644 build/has/statx-syscall.c
 create mode 100644 build/has/statx.c
 create mode 100644 build/has/strerror-l.c
 create mode 100644 build/has/strerror-r-gnu.c
 create mode 100644 build/has/strerror-r-posix.c
 create mode 100644 build/has/tm-gmtoff.c
 create mode 100644 build/has/uselocale.c
 create mode 100644 build/header.mk
 create mode 100755 build/pkgconf.sh
 create mode 100644 build/pkgs.mk
 create mode 100644 build/prelude.mk
 create mode 100644 build/use/libacl.c
 create mode 100644 build/use/libcap.c
 create mode 100644 build/use/libselinux.c
 create mode 100644 build/use/liburing.c
 create mode 100644 build/use/oniguruma.c
 delete mode 100755 config/cc.sh
 delete mode 100644 config/config.mk
 delete mode 100755 config/define-if.sh
 delete mode 100644 config/deps.mk
 delete mode 100644 config/empty.c
 delete mode 100644 config/exports.mk
 delete mode 100644 config/flags.mk
 delete mode 100644 config/has/acl-get-entry.c
 delete mode 100644 config/has/acl-get-file.c
 delete mode 100644 config/has/acl-get-tag-type.c
 delete mode 100644 config/has/acl-is-trivial-np.c
 delete mode 100644 config/has/acl-trivial.c
 delete mode 100644 config/has/aligned-alloc.c
 delete mode 100644 config/has/confstr.c
 delete mode 100644 config/has/extattr-get-file.c
 delete mode 100644 config/has/extattr-get-link.c
 delete mode 100644 config/has/extattr-list-file.c
 delete mode 100644 config/has/extattr-list-link.c
 delete mode 100644 config/has/fdclosedir.c
 delete mode 100644 config/has/getdents.c
 delete mode 100644 config/has/getdents64-syscall.c
 delete mode 100644 config/has/getdents64.c
 delete mode 100644 config/has/getprogname-gnu.c
 delete mode 100644 config/has/getprogname.c
 delete mode 100644 config/has/max-align-t.c
 delete mode 100644 config/has/pipe2.c
 delete mode 100644 config/has/posix-spawn-addfchdir-np.c
 delete mode 100644 config/has/posix-spawn-addfchdir.c
 delete mode 100644 config/has/st-acmtim.c
 delete mode 100644 config/has/st-acmtimespec.c
 delete mode 100644 config/has/st-birthtim.c
 delete mode 100644 config/has/st-birthtimespec.c
 delete mode 100644 config/has/st-flags.c
 delete mode 100644 config/has/statx-syscall.c
 delete mode 100644 config/has/statx.c
 delete mode 100644 config/has/strerror-l.c
 delete mode 100644 config/has/strerror-r-gnu.c
 delete mode 100644 config/has/strerror-r-posix.c
 delete mode 100644 config/has/tm-gmtoff.c
 delete mode 100644 config/has/uselocale.c
 delete mode 100644 config/header.mk
 delete mode 100755 config/pkgconf.sh
 delete mode 100644 config/pkgs.mk
 delete mode 100644 config/prelude.mk
 delete mode 100644 config/use/libacl.c
 delete mode 100644 config/use/libcap.c
 delete mode 100644 config/use/libselinux.c
 delete mode 100644 config/use/liburing.c
 delete mode 100644 config/use/oniguruma.c
 create mode 100755 configure

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3890bb0..57f59f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -107,7 +107,7 @@ jobs:
                 gmake \
                 oniguruma
             jobs=$(sysctl -n hw.ncpu)
-            gmake -j$jobs config
+            MAKE=gmake ./configure
             gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
   netbsd:
@@ -133,7 +133,7 @@ jobs:
                 pkgconf \
                 tcl-expect
             jobs=$(sysctl -n hw.ncpu)
-            make -j$jobs config
+            ./configure
             make -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
   dragonflybsd:
@@ -165,7 +165,7 @@ jobs:
           run: |
             chown -R action:action .
             jobs=$(sysctl -n hw.ncpu)
-            sudo -u action make config
+            sudo -u action ./configure
             sudo -u action make -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
   omnios:
@@ -198,5 +198,5 @@ jobs:
             PATH="/usr/xpg4/bin:$PATH"
             chown -R action:staff .
             jobs=$(getconf NPROCESSORS_ONLN)
-            sudo -u action gmake config
+            sudo -u action MAKE=gmake ./configure
             sudo -u action gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index 2245f40..bb68927 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -25,7 +25,7 @@ jobs:
 
       - name: Generate coverage
         run: |
-          make config GCOV=y
+          ./configure GCOV=y
           make -j$(nproc) check TEST_FLAGS="--sudo"
           gcov -abcfpu obj/*/*.o
 
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index c21fda5..a0b8fe3 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -41,7 +41,7 @@ jobs:
 
       - name: Configure
         run: |
-          make -j$(nproc) config
+          ./configure
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v3
diff --git a/Makefile b/Makefile
index 981c322..2fb35fd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,56 +1,50 @@
 # Copyright © Tavian Barnes 
 # SPDX-License-Identifier: 0BSD
 
-# This Makefile implements the configuration and build steps for bfs.  It is
-# portable to both GNU make and most BSD make implementations.  To build bfs,
-# run
+# To build bfs, run
 #
-#     $ make config
+#     $ ./configure
 #     $ make
 
 # Utilities and GNU/BSD portability
-include config/prelude.mk
+include build/prelude.mk
 
 # The default build target
 default: bfs
 .PHONY: default
 
 # Include the generated build config, if it exists
--include ${CONFIG}
+-include gen/config.mk
 
-## Configuration phase (`make config`)
-
-# The configuration goal itself
-config::
-	@+${MAKE} -sf config/config.mk
+## Configuration phase (`./configure`)
 
 # bfs used to have flag-like targets (`make release`, `make asan ubsan`, etc.).
 # Direct users to the new configuration system.
 asan lsan msan tsan ubsan gcov lint release::
-	@printf 'error: `%s %s` is no longer supported. ' "${MAKE}" $@ >&2
-	@printf 'Use `%s config %s=y` instead.\n' "${MAKE}" $$(echo $@ | tr 'a-z' 'A-Z') >&2
+	@printf 'error: `%s %s` is no longer supported. Use `./configure %s=y` instead.\n' \
+	    "${MAKE}" $@ $$(echo $@ | tr 'a-z' 'A-Z') >&2
 	@false
 
-# Print an error if `make` is run before `make config`
-${CONFIG}::
+# Print an error if `make` is run before `./configure`
+gen/config.mk::
 	@if ! [ -e $@ ]; then \
-	    printf 'error: You must run `%s config` before `%s`.\n' "${MAKE}" "${MAKE}" >&2; \
+	    printf 'error: You must run `./configure` before `%s`.\n' "${MAKE}" >&2; \
 	    false; \
 	fi
 
 ## Build phase (`make`)
 
 # The main binary
-bfs: ${BIN}/bfs
+bfs: bin/bfs
 .PHONY: bfs
 
 # All binaries
 BINS := \
-    ${BIN}/bfs \
-    ${BIN}/tests/mksock \
-    ${BIN}/tests/units \
-    ${BIN}/tests/xspawnee \
-    ${BIN}/tests/xtouch
+    bin/bfs \
+    bin/tests/mksock \
+    bin/tests/units \
+    bin/tests/xspawnee \
+    bin/tests/xtouch
 
 all: ${BINS}
 .PHONY: all
@@ -60,52 +54,50 @@ ALL_CFLAGS = ${CPPFLAGS} ${CFLAGS} ${DEPFLAGS}
 ALL_LDFLAGS = ${CFLAGS} ${LDFLAGS}
 
 # The main binary
-${BIN}/bfs: ${LIBBFS} ${OBJ}/src/main.o
+bin/bfs: ${LIBBFS} obj/src/main.o
 
 ${BINS}:
 	@${MKDIR} ${@D}
-	+${MSG} "[ LD ] ${TGT}" ${CC} ${ALL_LDFLAGS} ${.ALLSRC} ${LDLIBS} -o $@
+	+${MSG} "[ LD ] $@" ${CC} ${ALL_LDFLAGS} ${.ALLSRC} ${LDLIBS} -o $@
 	${POSTLINK}
 
 # Get the .c file for a .o file
-_CSRC = ${@:${OBJ}/%.o=%.c}
-CSRC = ${_CSRC:gen/%=${GEN}/%}
+CSRC = ${@:obj/%.o=%.c}
 
-# Depend on ${CONFIG} to make sure `make config` runs first, and to rebuild when
-# the configuration changes
-${OBJS}: ${CONFIG}
+# Rebuild when the configuration changes
+${OBJS}: gen/config.mk
 	@${MKDIR} ${@D}
-	${MSG} "[ CC ] ${_CSRC}" ${CC} ${ALL_CFLAGS} -c ${CSRC} -o $@
+	${MSG} "[ CC ] ${CSRC}" ${CC} ${ALL_CFLAGS} -c ${CSRC} -o $@
 
 # Save the version number to this file, but only update version.c if it changes
-${GEN}/version.c.new::
+gen/version.c.new::
 	@${MKDIR} ${@D}
 	@printf 'const char bfs_version[] = "' >$@
 	@if [ "$$VERSION" ]; then \
 	    printf '%s' "$$VERSION"; \
-	elif test -d .git && command -v git >/dev/null 2>&1; then \
-	    git describe --always --dirty; \
+	elif test -e src/../.git && command -v git >/dev/null 2>&1; then \
+	    git -C src/.. describe --always --dirty; \
 	else \
 	    echo "3.1.3"; \
 	fi | tr -d '\n' >>$@
 	@printf '";\n' >>$@
 
-${GEN}/version.c: ${GEN}/version.c.new
+gen/version.c: gen/version.c.new
 	@test -e $@ && cmp -s $@ ${.ALLSRC} && rm ${.ALLSRC} || mv ${.ALLSRC} $@
 
-${OBJ}/gen/version.o: ${GEN}/version.c
+obj/gen/version.o: gen/version.c
 
 ## Test phase (`make check`)
 
 # Unit test binaries
 UTEST_BINS := \
-    ${BIN}/tests/units \
-    ${BIN}/tests/xspawnee
+    bin/tests/units \
+    bin/tests/xspawnee
 
 # Integration test binaries
 ITEST_BINS := \
-    ${BIN}/tests/mksock \
-    ${BIN}/tests/xtouch
+    bin/tests/mksock \
+    bin/tests/xtouch
 
 # Build (but don't run) test binaries
 tests: ${UTEST_BINS} ${ITEST_BINS}
@@ -117,45 +109,45 @@ check: unit-tests integration-tests
 
 # Run the unit tests
 unit-tests: ${UTEST_BINS}
-	${MSG} "[TEST] tests/units" ${BIN}/tests/units
+	${MSG} "[TEST] tests/units" bin/tests/units
 .PHONY: unit-tests
 
-${BIN}/tests/units: \
+bin/tests/units: \
     ${UNIT_OBJS} \
     ${LIBBFS}
 
-${BIN}/tests/xspawnee: \
-    ${OBJ}/tests/xspawnee.o
+bin/tests/xspawnee: \
+    obj/tests/xspawnee.o
 
 # The different flag combinations we check
 INTEGRATIONS := default dfs ids eds j1 j2 j3 s
 INTEGRATION_TESTS := ${INTEGRATIONS:%=check-%}
 
 # Check just `bfs`
-check-default: ${BIN}/bfs ${ITEST_BINS}
+check-default: bin/bfs ${ITEST_BINS}
 	+${MSG} "[TEST] bfs" \
-	    ./tests/tests.sh --make="${MAKE}" --bfs="${BIN}/bfs" ${TEST_FLAGS}
+	    ./tests/tests.sh --make="${MAKE}" --bfs="bin/bfs" ${TEST_FLAGS}
 
 # Check the different search strategies
-check-dfs check-ids check-eds: ${BIN}/bfs ${ITEST_BINS}
+check-dfs check-ids check-eds: bin/bfs ${ITEST_BINS}
 	+${MSG} "[TEST] bfs -S ${@:check-%=%}" \
-	    ./tests/tests.sh --make="${MAKE}" --bfs="${BIN}/bfs -S ${@:check-%=%}" ${TEST_FLAGS}
+	    ./tests/tests.sh --make="${MAKE}" --bfs="bin/bfs -S ${@:check-%=%}" ${TEST_FLAGS}
 
 # Check various flags
-check-j1 check-j2 check-j3 check-s: ${BIN}/bfs ${ITEST_BINS}
+check-j1 check-j2 check-j3 check-s: bin/bfs ${ITEST_BINS}
 	+${MSG} "[TEST] bfs -${@:check-%=%}" \
-	    ./tests/tests.sh --make="${MAKE}" --bfs="${BIN}/bfs -${@:check-%=%}" ${TEST_FLAGS}
+	    ./tests/tests.sh --make="${MAKE}" --bfs="bin/bfs -${@:check-%=%}" ${TEST_FLAGS}
 
 # Run the integration tests
 integration-tests: ${INTEGRATION_TESTS}
 .PHONY: integration-tests
 
-${BIN}/tests/mksock: \
-    ${OBJ}/tests/mksock.o \
+bin/tests/mksock: \
+    obj/tests/mksock.o \
     ${LIBBFS}
 
-${BIN}/tests/xtouch: \
-    ${OBJ}/tests/xtouch.o \
+bin/tests/xtouch: \
+    obj/tests/xtouch.o \
     ${LIBBFS}
 
 # `make distcheck` configurations
@@ -183,8 +175,10 @@ DISTCHECK_CONFIG_m32 := EXTRA_CFLAGS="-m32" PKG_CONFIG_LIBDIR=/usr/lib32/pkgconf
 DISTCHECK_CONFIG_release := RELEASE=y
 
 ${DISTCHECKS}::
-	+${MAKE} -rs BUILDDIR=${BUILDDIR}/$@ config ${DISTCHECK_CONFIG_${@:distcheck-%=%}}
-	+${MAKE} -s BUILDDIR=${BUILDDIR}/$@ check TEST_FLAGS="--sudo --verbose=skipped"
+	@${MKDIR} $@
+	@+cd $@ \
+	    && ../configure ${DISTCHECK_CONFIG_${@:distcheck-%=%}} \
+	    && ${MAKE} -s check TEST_FLAGS="--sudo --verbose=skipped"
 
 ## Packaging (`make install`)
 
@@ -193,44 +187,49 @@ DEST_MANDIR := ${DESTDIR}${MANDIR}
 
 install::
 	${Q}${MKDIR} ${DEST_PREFIX}/bin
-	${MSG} "[INSTALL] bin/bfs" \
-	    ${INSTALL} -m755 ${BIN}/bfs ${DEST_PREFIX}/bin/bfs
+	${MSG} "[INST] bin/bfs" \
+	    ${INSTALL} -m755 bin/bfs ${DEST_PREFIX}/bin/bfs
 	${Q}${MKDIR} ${DEST_MANDIR}/man1
-	${MSG} "[INSTALL] man/man1/bfs.1" \
+	${MSG} "[INST] man/man1/bfs.1" \
 	    ${INSTALL} -m644 docs/bfs.1 ${DEST_MANDIR}/man1/bfs.1
 	${Q}${MKDIR} ${DEST_PREFIX}/share/bash-completion/completions
-	${MSG} "[INSTALL] completions/bfs.bash" \
+	${MSG} "[INST] completions/bfs.bash" \
 	    ${INSTALL} -m644 completions/bfs.bash ${DEST_PREFIX}/share/bash-completion/completions/bfs
 	${Q}${MKDIR} ${DEST_PREFIX}/share/zsh/site-functions
-	${MSG} "[INSTALL] completions/bfs.zsh" \
+	${MSG} "[INST] completions/bfs.zsh" \
 	    ${INSTALL} -m644 completions/bfs.zsh ${DEST_PREFIX}/share/zsh/site-functions/_bfs
 	${Q}${MKDIR} ${DEST_PREFIX}/share/fish/vendor_completions.d
-	${MSG} "[INSTALL] completions/bfs.fish" \
+		${MSG} "[INST] completions/bfs.fish" \
 	    ${INSTALL} -m644 completions/bfs.fish ${DEST_PREFIX}/share/fish/vendor_completions.d/bfs.fish
 
 uninstall::
-	${RM} ${DEST_PREFIX}/share/bash-completion/completions/bfs
-	${RM} ${DEST_PREFIX}/share/zsh/site-functions/_bfs
-	${RM} ${DEST_PREFIX}/share/fish/vendor_completions.d/bfs.fish
-	${RM} ${DEST_MANDIR}/man1/bfs.1
-	${RM} ${DEST_PREFIX}/bin/bfs
+	${MSG} "[ RM ] completions/bfs.bash" \
+	    ${RM} ${DEST_PREFIX}/share/bash-completion/completions/bfs
+	${MSG} "[ RM ] completions/bfs.zsh" \
+	    ${RM} ${DEST_PREFIX}/share/zsh/site-functions/_bfs
+	${MSG} "[ RM ] completions/bfs.fish" \
+	    ${RM} ${DEST_PREFIX}/share/fish/vendor_completions.d/bfs.fish
+	${MSG} "[ RM ] man/man1/bfs.1" \
+	    ${RM} ${DEST_MANDIR}/man1/bfs.1
+	${MSG} "[ RM ] bin/bfs" \
+	    ${RM} ${DEST_PREFIX}/bin/bfs
 
 # Check that `make install` works and `make uninstall` removes everything
 check-install::
-	+${MAKE} install DESTDIR=${BUILDDIR}/pkg
-	+${MAKE} uninstall DESTDIR=${BUILDDIR}/pkg
-	${BIN}/bfs ${BUILDDIR}/pkg -not -type d -print -exit 1
-	${RM} -r ${BUILDDIR}/pkg
+	+${MAKE} install DESTDIR=pkg
+	+${MAKE} uninstall DESTDIR=pkg
+	bin/bfs pkg -not -type d -print -exit 1
+	${RM} -r pkg
 
 ## Cleanup (`make clean`)
 
 # Clean all build products
 clean::
 	${MSG} "[ RM ] bin obj" \
-	    ${RM} -r ${BIN} ${OBJ}
+	    ${RM} -r bin obj
 
 # Clean everything, including generated files
 distclean: clean
 	${MSG} "[ RM ] gen" \
-	    ${RM} -r ${GEN} ${DISTCHECKS}
+	    ${RM} -r gen ${DISTCHECKS}
 .PHONY: distclean
diff --git a/README.md b/README.md
index b95c16b..922ebdc 100644
--- a/README.md
+++ b/README.md
@@ -333,7 +333,7 @@ Once you have the dependencies, you can build bfs.
 Download one of the [releases](https://github.com/tavianator/bfs/releases) or clone the [git repo](https://github.com/tavianator/bfs).
 Then run
 
-    $ make config
+    $ ./configure
     $ make
 
 This will build the `./bin/bfs` binary.
@@ -343,7 +343,7 @@ Run the test suite to make sure it works correctly:
 
 If you're interested in speed, you may want to build the release version instead:
 
-    $ make config RELEASE=y
+    $ ./configure RELEASE=y
     $ make
 
 Finally, if you want to install it globally, run
diff --git a/bench/bench.sh b/bench/bench.sh
index 1526fe5..ba46599 100644
--- a/bench/bench.sh
+++ b/bench/bench.sh
@@ -221,7 +221,7 @@ setup() {
     fi
 
     echo "Building bfs ..."
-    as-user make -s -j"$nproc" RELEASE=y
+    as-user ./configure RELEASE=y
     as-user make -s -j"$nproc" all
 
     as-user mkdir -p bench/corpus
@@ -254,8 +254,8 @@ setup() {
                 echo "Building bfs $commit ..."
                 cd "$worktree"
                 as-user git checkout -qd "$commit" --
-                if [ -e config ]; then
-                    as-user make -s -j"$nproc" config RELEASE=1
+                if [ -e configure ]; then
+                    as-user ./configure RELEASE=1
                     as-user make -s -j"$nproc"
                 else
                     as-user make -s -j"$nproc" release
diff --git a/build/cc.sh b/build/cc.sh
new file mode 100755
index 0000000..45d51ca
--- /dev/null
+++ b/build/cc.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Run the compiler and check if it succeeded
+
+set -eu
+
+TMP=$(mktemp)
+trap 'rm -f "$TMP"' EXIT
+
+(
+    set -x
+    $XCC $XCPPFLAGS $XCFLAGS $XLDFLAGS "$@" $XLDLIBS -o "$TMP"
+)
diff --git a/build/config.mk b/build/config.mk
new file mode 100644
index 0000000..153838d
--- /dev/null
+++ b/build/config.mk
@@ -0,0 +1,62 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Makefile that implements `./configure`
+
+include build/prelude.mk
+include build/exports.mk
+
+# All configuration steps
+config: gen/config.mk gen/config.h
+.PHONY: config
+
+# Makefile fragments generated by `./configure`
+MKS := \
+    gen/vars.mk \
+    gen/flags.mk \
+    gen/deps.mk \
+    gen/pkgs.mk
+
+# The main configuration file, which includes the others
+gen/config.mk: ${MKS}
+	${MSG} "[ GEN] $@"
+	@printf '# %s\n' "$@" >$@
+	@printf 'include %s\n' ${.ALLSRC} >>$@
+	${VCAT} gen/config.mk
+.PHONY: gen/config.mk
+
+# Saves the configurable variables
+gen/vars.mk::
+	@${MKDIR} ${@D}
+	${MSG} "[ GEN] $@"
+	@printf '# %s\n' "$@" >$@
+	@printf 'PREFIX := %s\n' "$$XPREFIX" >>$@
+	@printf 'MANDIR := %s\n' "$$XMANDIR" >>$@
+	@printf 'OS := %s\n' "$${OS:-$$(uname)}" >>$@
+	@printf 'CC := %s\n' "$$XCC" >>$@
+	@printf 'INSTALL := %s\n' "$$XINSTALL" >>$@
+	@printf 'MKDIR := %s\n' "$$XMKDIR" >>$@
+	@printf 'PKG_CONFIG := %s\n' "$$XPKG_CONFIG" >>$@
+	@printf 'RM := %s\n' "$$XRM" >>$@
+	${VCAT} $@
+
+# Sets the build flags.  This depends on vars.mk and uses a recursive make so
+# that the default flags can depend on variables like ${OS}.
+gen/flags.mk: gen/vars.mk
+	@+${MAKE} -sf build/flags.mk $@
+.PHONY: gen/flags.mk
+
+# Check for dependency generation support
+gen/deps.mk: gen/flags.mk
+	@+${MAKE} -sf build/deps.mk $@
+.PHONY: gen/deps.mk
+
+# Auto-detect dependencies and their build flags
+gen/pkgs.mk: gen/flags.mk
+	@+${MAKE} -sf build/pkgs.mk $@
+.PHONY: gen/pkgs.mk
+
+# Compile-time feature detection
+gen/config.h: gen/config.mk
+	@+${MAKE} -sf build/header.mk $@
+.PHONY: gen/config.h
diff --git a/build/define-if.sh b/build/define-if.sh
new file mode 100755
index 0000000..295ead8
--- /dev/null
+++ b/build/define-if.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Output a C preprocessor definition based on whether a command succeeds
+
+set -eu
+
+SLUG="${1#build/}"
+SLUG="${SLUG%.c}"
+MACRO="BFS_$(printf '%s' "$SLUG" | tr '/a-z-' '_A-Z_')"
+shift
+
+if "$@"; then
+    printf '#define %s true\n' "$MACRO"
+else
+    printf '#define %s false\n' "$MACRO"
+    exit 1
+fi
diff --git a/build/deps.mk b/build/deps.mk
new file mode 100644
index 0000000..e8dd9fb
--- /dev/null
+++ b/build/deps.mk
@@ -0,0 +1,18 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Makefile that generates gen/deps.mk
+
+include build/prelude.mk
+include gen/vars.mk
+include gen/flags.mk
+include build/exports.mk
+
+gen/deps.mk::
+	${MSG} "[ GEN] $@"
+	printf '# %s\n' "$@" >$@
+	if build/cc.sh -MD -MP -MF /dev/null build/empty.c; then \
+	    printf 'DEPFLAGS := -MD -MP\n'; \
+	fi >>$@ 2>$@.log
+	${VCAT} $@
+	printf -- '-include %s\n' ${OBJS:.o=.d} >>$@
diff --git a/build/empty.c b/build/empty.c
new file mode 100644
index 0000000..4fa9a5b
--- /dev/null
+++ b/build/empty.c
@@ -0,0 +1,6 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+int main(void) {
+	return 0;
+}
diff --git a/build/exports.mk b/build/exports.mk
new file mode 100644
index 0000000..ed19134
--- /dev/null
+++ b/build/exports.mk
@@ -0,0 +1,20 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Makefile fragment that exports variables used by configuration scripts
+
+export XPREFIX=${PREFIX}
+export XMANDIR=${MANDIR}
+
+export XCC=${CC}
+export XINSTALL=${INSTALL}
+export XMKDIR=${MKDIR}
+export XPKG_CONFIG=${PKG_CONFIG}
+export XRM=${RM}
+
+export XCPPFLAGS=${CPPFLAGS}
+export XCFLAGS=${CFLAGS}
+export XLDFLAGS=${LDFLAGS}
+export XLDLIBS=${LDLIBS}
+
+export XNOLIBS=${NOLIBS}
diff --git a/build/flags.mk b/build/flags.mk
new file mode 100644
index 0000000..0a44e94
--- /dev/null
+++ b/build/flags.mk
@@ -0,0 +1,136 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Makefile that generates gen/flags.mk
+
+include build/prelude.mk
+include gen/vars.mk
+
+# Configurable flags
+CPPFLAGS ?=
+CFLAGS ?= \
+    -g \
+    -Wall \
+    -Wformat=2 \
+    -Werror=implicit \
+    -Wimplicit-fallthrough \
+    -Wmissing-declarations \
+    -Wshadow \
+    -Wsign-compare \
+    -Wstrict-prototypes
+LDFLAGS ?=
+LDLIBS ?=
+
+export XCPPFLAGS=${CPPFLAGS}
+export XCFLAGS=${CFLAGS}
+export XLDFLAGS=${LDFLAGS}
+export XLDLIBS=${LDLIBS}
+
+# Immutable flags
+export BFS_CPPFLAGS= \
+    -Isrc \
+    -Igen \
+    -D__EXTENSIONS__ \
+    -D_ATFILE_SOURCE \
+    -D_BSD_SOURCE \
+    -D_DARWIN_C_SOURCE \
+    -D_DEFAULT_SOURCE \
+    -D_GNU_SOURCE \
+    -D_POSIX_PTHREAD_SEMANTICS \
+    -D_FILE_OFFSET_BITS=64 \
+    -D_TIME_BITS=64
+export BFS_CFLAGS= -std=c17 -pthread
+
+# Platform-specific system libraries
+LDLIBS,DragonFly := -lposix1e
+LDLIBS,Linux := -lrt
+LDLIBS,NetBSD := -lutil
+LDLIBS,SunOS := -lsec -lsocket -lnsl
+export BFS_LDLIBS=${LDLIBS,${OS}}
+
+# Build profiles
+_ASAN := ${TRUTHY,${ASAN}}
+_LSAN := ${TRUTHY,${LSAN}}
+_MSAN := ${TRUTHY,${MSAN}}
+_TSAN := ${TRUTHY,${TSAN}}
+_UBSAN := ${TRUTHY,${UBSAN}}
+_GCOV := ${TRUTHY,${GCOV}}
+_LINT := ${TRUTHY,${LINT}}
+_RELEASE := ${TRUTHY,${RELEASE}}
+
+# https://github.com/google/sanitizers/issues/342
+TSAN_CPPFLAGS,y := -DBFS_USE_TARGET_CLONES=0
+export TSAN_CPPFLAGS=${TSAN_CPPFLAGS,${_TSAN}}
+
+ASAN_CFLAGS,y := -fsanitize=address
+LSAN_CFLAGS,y := -fsanitize=leak
+MSAN_CFLAGS,y := -fsanitize=memory -fsanitize-memory-track-origins
+TSAN_CFLAGS,y := -fsanitize=thread
+UBSAN_CFLAGS.y := -fsanitize=undefined
+
+export ASAN_CFLAGS=${ASAN_CFLAGS,${_ASAN}}
+export LSAN_CFLAGS=${LSAN_CFLAGS,${_LSAN}}
+export MSAN_CFLAGS=${MSAN_CFLAGS,${_MSAN}}
+export TSAN_CFLAGS=${TSAN_CFLAGS,${_TSAN}}
+export UBSAN_CFLAGS=${UBSAN_CFLAGS,${_UBSAN}}
+
+SAN_CFLAGS,y := -fno-sanitize-recover=all
+INSANE := ${NOT,${_ASAN}${_LSAN}${_MSAN}${_TSAN}${_UBSAN}}
+SAN := ${NOT,${INSANE}}
+export SAN_CFLAGS=${SAN_CFLAGS,${SAN}}
+
+# MSAN and TSAN both need all code to be instrumented
+YESLIBS := ${NOT,${_MSAN}${_TSAN}}
+NOLIBS ?= ${NOT,${YESLIBS}}
+export XNOLIBS=${NOLIBS}
+
+# gcov only intercepts fork()/exec() with -std=gnu*
+GCOV_CFLAGS,y := -std=gnu17 --coverage
+export GCOV_CFLAGS=${GCOV_CFLAGS,${_GCOV}}
+
+LINT_CPPFLAGS,y := -D_FORTIFY_SOURCE=3 -DBFS_LINT
+LINT_CFLAGS,y := -Werror -O2
+
+export LINT_CPPFLAGS=${LINT_CPPFLAGS,${_LINT}}
+export LINT_CFLAGS=${LINT_CFLAGS,${_LINT}}
+
+RELEASE_CPPFLAGS,y := -DNDEBUG
+RELEASE_CFLAGS,y := -O3 -flto=auto
+
+export RELEASE_CPPFLAGS=${RELEASE_CPPFLAGS,${_RELEASE}}
+export RELEASE_CFLAGS=${RELEASE_CFLAGS,${_RELEASE}}
+
+# Set a variable
+SETVAR = printf '%s := %s\n' >>$@
+
+# Append to a variable, if non-empty
+APPEND = append() { test -z "$$2" || printf '%s += %s\n' "$$1" "$$2" >>$@; }; append
+
+gen/flags.mk::
+	${MSG} "[ GEN] $@"
+	printf '# %s\n' "$@" >$@
+	${SETVAR} CPPFLAGS "$$BFS_CPPFLAGS"
+	${APPEND} CPPFLAGS "$$TSAN_CPPFLAGS"
+	${APPEND} CPPFLAGS "$$LINT_CPPFLAGS"
+	${APPEND} CPPFLAGS "$$RELEASE_CPPFLAGS"
+	${APPEND} CPPFLAGS "$$XCPPFLAGS"
+	${APPEND} CPPFLAGS "$$EXTRA_CPPFLAGS"
+	${SETVAR} CFLAGS "$$BFS_CFLAGS"
+	${APPEND} CFLAGS "$$ASAN_CFLAGS"
+	${APPEND} CFLAGS "$$LSAN_CFLAGS"
+	${APPEND} CFLAGS "$$MSAN_CFLAGS"
+	${APPEND} CFLAGS "$$TSAN_CFLAGS"
+	${APPEND} CFLAGS "$$UBSAN_CFLAGS"
+	${APPEND} CFLAGS "$$SAN_CFLAGS"
+	${APPEND} CFLAGS "$$GCOV_CFLAGS"
+	${APPEND} CFLAGS "$$LINT_CFLAGS"
+	${APPEND} CFLAGS "$$RELEASE_CFLAGS"
+	${APPEND} CFLAGS "$$XCFLAGS"
+	${APPEND} CFLAGS "$$EXTRA_CFLAGS"
+	${SETVAR} LDFLAGS "$$XLDFLAGS"
+	${SETVAR} LDLIBS "$$XLDLIBS"
+	${APPEND} LDLIBS "$$EXTRA_LDLIBS"
+	${APPEND} LDLIBS "$$BFS_LDLIBS"
+	${SETVAR} NOLIBS "$$XNOLIBS"
+	test "${OS}-${SAN}" != FreeBSD-y || printf 'POSTLINK = elfctl -e +noaslr $$@\n' >>$@
+	${VCAT} $@
diff --git a/build/has/acl-get-entry.c b/build/has/acl-get-entry.c
new file mode 100644
index 0000000..3cce771
--- /dev/null
+++ b/build/has/acl-get-entry.c
@@ -0,0 +1,8 @@
+#include 
+#include 
+
+int main(void) {
+	acl_t acl = acl_get_file(".", ACL_TYPE_DEFAULT);
+	acl_entry_t entry;
+	return acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
+}
diff --git a/build/has/acl-get-file.c b/build/has/acl-get-file.c
new file mode 100644
index 0000000..89fbf23
--- /dev/null
+++ b/build/has/acl-get-file.c
@@ -0,0 +1,8 @@
+#include 
+#include 
+#include 
+
+int main(void) {
+	acl_t acl = acl_get_file(".", ACL_TYPE_DEFAULT);
+	return acl == (acl_t)NULL;
+}
diff --git a/build/has/acl-get-tag-type.c b/build/has/acl-get-tag-type.c
new file mode 100644
index 0000000..2901956
--- /dev/null
+++ b/build/has/acl-get-tag-type.c
@@ -0,0 +1,10 @@
+#include 
+#include 
+#include 
+
+int main(void) {
+	acl_entry_t entry;
+	memset(&entry, 0, sizeof(entry));
+	acl_tag_t tag;
+	return acl_get_tag_type(entry, &tag);
+}
diff --git a/build/has/acl-is-trivial-np.c b/build/has/acl-is-trivial-np.c
new file mode 100644
index 0000000..9ca9fc7
--- /dev/null
+++ b/build/has/acl-is-trivial-np.c
@@ -0,0 +1,12 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+
+int main(void) {
+	acl_t acl = acl_get_fd(3);
+	int trivial;
+	acl_is_trivial_np(acl, &trivial);
+	return 0;
+}
diff --git a/build/has/acl-trivial.c b/build/has/acl-trivial.c
new file mode 100644
index 0000000..7efc838
--- /dev/null
+++ b/build/has/acl-trivial.c
@@ -0,0 +1,8 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	return acl_trivial(".");
+}
diff --git a/build/has/aligned-alloc.c b/build/has/aligned-alloc.c
new file mode 100644
index 0000000..4460038
--- /dev/null
+++ b/build/has/aligned-alloc.c
@@ -0,0 +1,8 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	return !aligned_alloc(_Alignof(void *), sizeof(void *));
+}
diff --git a/build/has/confstr.c b/build/has/confstr.c
new file mode 100644
index 0000000..58280b4
--- /dev/null
+++ b/build/has/confstr.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	confstr(_CS_PATH, NULL, 0);
+	return 0;
+}
diff --git a/build/has/extattr-get-file.c b/build/has/extattr-get-file.c
new file mode 100644
index 0000000..ac9cf96
--- /dev/null
+++ b/build/has/extattr-get-file.c
@@ -0,0 +1,10 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+#include 
+
+int main(void) {
+	return extattr_get_file("file", EXTATTR_NAMESPACE_USER, "xattr", NULL, 0);
+}
diff --git a/build/has/extattr-get-link.c b/build/has/extattr-get-link.c
new file mode 100644
index 0000000..c35be5b
--- /dev/null
+++ b/build/has/extattr-get-link.c
@@ -0,0 +1,10 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+#include 
+
+int main(void) {
+	return extattr_get_link("link", EXTATTR_NAMESPACE_USER, "xattr", NULL, 0);
+}
diff --git a/build/has/extattr-list-file.c b/build/has/extattr-list-file.c
new file mode 100644
index 0000000..e68a8bb
--- /dev/null
+++ b/build/has/extattr-list-file.c
@@ -0,0 +1,10 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+#include 
+
+int main(void) {
+	return extattr_list_file("file", EXTATTR_NAMESPACE_USER, NULL, 0);
+}
diff --git a/build/has/extattr-list-link.c b/build/has/extattr-list-link.c
new file mode 100644
index 0000000..49f0ec2
--- /dev/null
+++ b/build/has/extattr-list-link.c
@@ -0,0 +1,10 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+#include 
+
+int main(void) {
+	return extattr_list_link("link", EXTATTR_NAMESPACE_USER, NULL, 0);
+}
diff --git a/build/has/fdclosedir.c b/build/has/fdclosedir.c
new file mode 100644
index 0000000..f4ad1f5
--- /dev/null
+++ b/build/has/fdclosedir.c
@@ -0,0 +1,8 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	return fdclosedir(opendir("."));
+}
diff --git a/build/has/getdents.c b/build/has/getdents.c
new file mode 100644
index 0000000..d0d4228
--- /dev/null
+++ b/build/has/getdents.c
@@ -0,0 +1,10 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	struct dirent de;
+	getdents(3, &de, 1024);
+	return 0;
+}
diff --git a/build/has/getdents64-syscall.c b/build/has/getdents64-syscall.c
new file mode 100644
index 0000000..4838c14
--- /dev/null
+++ b/build/has/getdents64-syscall.c
@@ -0,0 +1,12 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+#include 
+
+int main(void) {
+	struct dirent64 de;
+	syscall(SYS_getdents64, 3, &de, 1024);
+	return 0;
+}
diff --git a/build/has/getdents64.c b/build/has/getdents64.c
new file mode 100644
index 0000000..1abf36d
--- /dev/null
+++ b/build/has/getdents64.c
@@ -0,0 +1,10 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	struct dirent64 de;
+	getdents64(3, &de, 1024);
+	return 0;
+}
diff --git a/build/has/getprogname-gnu.c b/build/has/getprogname-gnu.c
new file mode 100644
index 0000000..6b97c5e
--- /dev/null
+++ b/build/has/getprogname-gnu.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	const char *str = program_invocation_short_name;
+	return str[0];
+}
diff --git a/build/has/getprogname.c b/build/has/getprogname.c
new file mode 100644
index 0000000..83dc8e8
--- /dev/null
+++ b/build/has/getprogname.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	const char *str = getprogname();
+	return str[0];
+}
diff --git a/build/has/max-align-t.c b/build/has/max-align-t.c
new file mode 100644
index 0000000..96165ce
--- /dev/null
+++ b/build/has/max-align-t.c
@@ -0,0 +1,8 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	return _Alignof(max_align_t);
+}
diff --git a/build/has/pipe2.c b/build/has/pipe2.c
new file mode 100644
index 0000000..4cb43b5
--- /dev/null
+++ b/build/has/pipe2.c
@@ -0,0 +1,10 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+
+int main(void) {
+	int fds[2];
+	return pipe2(fds, O_CLOEXEC);
+}
diff --git a/build/has/posix-spawn-addfchdir-np.c b/build/has/posix-spawn-addfchdir-np.c
new file mode 100644
index 0000000..b870a53
--- /dev/null
+++ b/build/has/posix-spawn-addfchdir-np.c
@@ -0,0 +1,11 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	posix_spawn_file_actions_t actions;
+	posix_spawn_file_actions_init(&actions);
+	posix_spawn_file_actions_addfchdir_np(&actions, 3);
+	return 0;
+}
diff --git a/build/has/posix-spawn-addfchdir.c b/build/has/posix-spawn-addfchdir.c
new file mode 100644
index 0000000..c52ff81
--- /dev/null
+++ b/build/has/posix-spawn-addfchdir.c
@@ -0,0 +1,11 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	posix_spawn_file_actions_t actions;
+	posix_spawn_file_actions_init(&actions);
+	posix_spawn_file_actions_addfchdir(&actions, 3);
+	return 0;
+}
diff --git a/build/has/st-acmtim.c b/build/has/st-acmtim.c
new file mode 100644
index 0000000..d687ab0
--- /dev/null
+++ b/build/has/st-acmtim.c
@@ -0,0 +1,12 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	struct stat sb = {0};
+	unsigned int a = sb.st_atim.tv_sec;
+	unsigned int c = sb.st_ctim.tv_sec;
+	unsigned int m = sb.st_mtim.tv_sec;
+	return a + c + m;
+}
diff --git a/build/has/st-acmtimespec.c b/build/has/st-acmtimespec.c
new file mode 100644
index 0000000..f747bc0
--- /dev/null
+++ b/build/has/st-acmtimespec.c
@@ -0,0 +1,12 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	struct stat sb = {0};
+	unsigned int a = sb.st_atimespec.tv_sec;
+	unsigned int c = sb.st_ctimespec.tv_sec;
+	unsigned int m = sb.st_mtimespec.tv_sec;
+	return a + c + m;
+}
diff --git a/build/has/st-birthtim.c b/build/has/st-birthtim.c
new file mode 100644
index 0000000..4964571
--- /dev/null
+++ b/build/has/st-birthtim.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	struct stat sb = {0};
+	return sb.st_birthtim.tv_sec;
+}
diff --git a/build/has/st-birthtimespec.c b/build/has/st-birthtimespec.c
new file mode 100644
index 0000000..91a613f
--- /dev/null
+++ b/build/has/st-birthtimespec.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	struct stat sb = {0};
+	return sb.st_birthtimespec.tv_sec;
+}
diff --git a/build/has/st-flags.c b/build/has/st-flags.c
new file mode 100644
index 0000000..b1d0c32
--- /dev/null
+++ b/build/has/st-flags.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	struct stat sb = {0};
+	return sb.st_flags;
+}
diff --git a/build/has/statx-syscall.c b/build/has/statx-syscall.c
new file mode 100644
index 0000000..87ec869
--- /dev/null
+++ b/build/has/statx-syscall.c
@@ -0,0 +1,13 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+#include 
+#include 
+
+int main(void) {
+	struct statx sb;
+	syscall(SYS_statx, AT_FDCWD, ".", 0, STATX_BASIC_STATS, &sb);
+	return 0;
+}
diff --git a/build/has/statx.c b/build/has/statx.c
new file mode 100644
index 0000000..65f1674
--- /dev/null
+++ b/build/has/statx.c
@@ -0,0 +1,11 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+
+int main(void) {
+	struct statx sb;
+	statx(AT_FDCWD, ".", 0, STATX_BASIC_STATS, &sb);
+	return 0;
+}
diff --git a/build/has/strerror-l.c b/build/has/strerror-l.c
new file mode 100644
index 0000000..3dcc4d7
--- /dev/null
+++ b/build/has/strerror-l.c
@@ -0,0 +1,11 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+#include 
+
+int main(void) {
+	locale_t locale = duplocale(LC_GLOBAL_LOCALE);
+	return !strerror_l(ENOMEM, locale);
+}
diff --git a/build/has/strerror-r-gnu.c b/build/has/strerror-r-gnu.c
new file mode 100644
index 0000000..26ca0ee
--- /dev/null
+++ b/build/has/strerror-r-gnu.c
@@ -0,0 +1,11 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+
+int main(void) {
+	char buf[256];
+	// Check that strerror_r() returns a pointer
+	return *strerror_r(ENOMEM, buf, sizeof(buf));
+}
diff --git a/build/has/strerror-r-posix.c b/build/has/strerror-r-posix.c
new file mode 100644
index 0000000..41b2d30
--- /dev/null
+++ b/build/has/strerror-r-posix.c
@@ -0,0 +1,11 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+#include 
+
+int main(void) {
+	char buf[256];
+	// Check that strerror_r() returns an integer
+	return 2 * strerror_r(ENOMEM, buf, sizeof(buf));
+}
diff --git a/build/has/tm-gmtoff.c b/build/has/tm-gmtoff.c
new file mode 100644
index 0000000..543df48
--- /dev/null
+++ b/build/has/tm-gmtoff.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	struct tm tm = {0};
+	return tm.tm_gmtoff;
+}
diff --git a/build/has/uselocale.c b/build/has/uselocale.c
new file mode 100644
index 0000000..a712ff8
--- /dev/null
+++ b/build/has/uselocale.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	locale_t locale = uselocale((locale_t)0);
+	return locale == LC_GLOBAL_LOCALE;
+}
diff --git a/build/header.mk b/build/header.mk
new file mode 100644
index 0000000..3f77ca5
--- /dev/null
+++ b/build/header.mk
@@ -0,0 +1,69 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Makefile that generates gen/config.h
+
+include build/prelude.mk
+include gen/config.mk
+include build/exports.mk
+
+# All header fragments we generate
+HEADERS := \
+    gen/has/acl-get-entry.h \
+    gen/has/acl-get-file.h \
+    gen/has/acl-get-tag-type.h \
+    gen/has/acl-is-trivial-np.h \
+    gen/has/acl-trivial.h \
+    gen/has/aligned-alloc.h \
+    gen/has/confstr.h \
+    gen/has/extattr-get-file.h \
+    gen/has/extattr-get-link.h \
+    gen/has/extattr-list-file.h \
+    gen/has/extattr-list-link.h \
+    gen/has/fdclosedir.h \
+    gen/has/getdents.h \
+    gen/has/getdents64.h \
+    gen/has/getdents64-syscall.h \
+    gen/has/getprogname.h \
+    gen/has/getprogname-gnu.h \
+    gen/has/max-align-t.h \
+    gen/has/pipe2.h \
+    gen/has/posix-spawn-addfchdir.h \
+    gen/has/posix-spawn-addfchdir-np.h \
+    gen/has/st-acmtim.h \
+    gen/has/st-acmtimespec.h \
+    gen/has/st-birthtim.h \
+    gen/has/st-birthtimespec.h \
+    gen/has/st-flags.h \
+    gen/has/statx.h \
+    gen/has/statx-syscall.h \
+    gen/has/strerror-l.h \
+    gen/has/strerror-r-gnu.h \
+    gen/has/strerror-r-posix.h \
+    gen/has/tm-gmtoff.h \
+    gen/has/uselocale.h
+
+# Previously generated by pkgs.mk
+PKG_HEADERS := ${ALL_PKGS:%=gen/use/%.h}
+
+gen/config.h: ${PKG_HEADERS} ${HEADERS}
+	${MSG} "[ GEN] $@"
+	printf '// %s\n' "$@" >$@
+	printf '#ifndef BFS_CONFIG_H\n' >>$@
+	printf '#define BFS_CONFIG_H\n' >>$@
+	cat ${.ALLSRC} >>$@
+	printf '#endif // BFS_CONFIG_H\n' >>$@
+	cat ${.ALLSRC:%=%.log} >$@.log
+	${VCAT} $@
+.PHONY: gen/config.h
+
+# The short name of the config test
+SLUG = ${@:gen/%.h=%}
+
+${HEADERS}::
+	${MKDIR} ${@D}
+	if build/define-if.sh ${SLUG} build/cc.sh build/${SLUG}.c >$@ 2>$@.log; then \
+	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✔\n' ${SLUG}.c; \
+	else \
+	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✘\n' ${SLUG}.c; \
+	fi
diff --git a/build/pkgconf.sh b/build/pkgconf.sh
new file mode 100755
index 0000000..96e4bf1
--- /dev/null
+++ b/build/pkgconf.sh
@@ -0,0 +1,100 @@
+#!/bin/sh
+
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# pkg-config wrapper with hardcoded fallbacks
+
+set -eu
+
+MODE=
+case "${1:-}" in
+    --*)
+        MODE="$1"
+        shift
+esac
+
+if [ $# -lt 1 ]; then
+    exit
+fi
+
+case "$XNOLIBS" in
+    y|1)
+        exit 1
+esac
+
+if [ -z "$MODE" ]; then
+    # Check whether the libraries exist at all
+    for LIB; do
+        # Check ${USE_$LIB}
+        USE_LIB="USE_$(printf '%s' "$LIB" | tr 'a-z-' 'A-Z_')"
+        eval "USE=\"\${$USE_LIB:-}\""
+        case "$USE" in
+            y|1)
+                continue
+                ;;
+            n|0)
+                exit 1
+                ;;
+        esac
+
+        CFLAGS=$("$0" --cflags "$LIB") || exit 1
+        LDFLAGS=$("$0" --ldflags "$LIB") || exit 1
+        LDLIBS=$("$0" --ldlibs "$LIB") || exit 1
+        build/cc.sh $CFLAGS $LDFLAGS build/use/$LIB.c $LDLIBS || exit 1
+    done
+fi
+
+# Defer to pkg-config if possible
+if command -v "${XPKG_CONFIG:-}" >/dev/null 2>&1; then
+    case "$MODE" in
+        --cflags)
+            "$XPKG_CONFIG" --cflags "$@"
+            ;;
+        --ldflags)
+            "$XPKG_CONFIG" --libs-only-L --libs-only-other "$@"
+            ;;
+        --ldlibs)
+            "$XPKG_CONFIG" --libs-only-l "$@"
+            ;;
+    esac
+
+    exit
+fi
+
+# pkg-config unavailable, emulate it ourselves
+CFLAGS=""
+LDFLAGS=""
+LDLIBS=""
+
+for LIB; do
+    case "$LIB" in
+        libacl)
+            LDLIB=-lacl
+            ;;
+        libcap)
+            LDLIB=-lcap
+            ;;
+        libselinux)
+            LDLIB=-lselinux
+            ;;
+        liburing)
+            LDLIB=-luring
+            ;;
+        oniguruma)
+            LDLIB=-lonig
+            ;;
+        *)
+            printf 'error: Unknown package %s\n' "$LIB" >&2
+            exit 1
+            ;;
+    esac
+
+    LDLIBS="$LDLIBS$LDLIB "
+done
+
+case "$MODE" in
+    --ldlibs)
+        printf '%s\n' "$LDLIBS"
+    ;;
+esac
diff --git a/build/pkgs.mk b/build/pkgs.mk
new file mode 100644
index 0000000..51ca664
--- /dev/null
+++ b/build/pkgs.mk
@@ -0,0 +1,36 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Makefile that generates gen/pkgs.mk
+
+include build/prelude.mk
+include gen/vars.mk
+include gen/flags.mk
+include build/exports.mk
+
+HEADERS := ${ALL_PKGS:%=gen/use/%.h}
+
+gen/pkgs.mk: ${HEADERS}
+	${MSG} "[ GEN] $@"
+	printf '# %s\n' "$@" >$@
+	gen() { \
+	    printf 'PKGS := %s\n' "$$*"; \
+	    printf 'CFLAGS += %s\n' "$$(build/pkgconf.sh --cflags "$$@")"; \
+	    printf 'LDFLAGS += %s\n' "$$(build/pkgconf.sh --ldflags "$$@")"; \
+	    printf 'LDLIBS := %s $${LDLIBS}\n' "$$(build/pkgconf.sh --ldlibs "$$@")"; \
+	}; \
+	gen $$(grep -l ' true$$' ${.ALLSRC} | sed 's|.*/\(.*\)\.h|\1|') >>$@
+	${VCAT} $@
+
+.PHONY: gen/pkgs.mk
+
+# Convert gen/use/foo.h to foo
+PKG = ${@:gen/use/%.h=%}
+
+${HEADERS}::
+	${MKDIR} ${@D}
+	if build/define-if.sh use/${PKG} build/pkgconf.sh ${PKG} >$@ 2>$@.log; then \
+	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✔\n' use/${PKG}.c; \
+	else \
+	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✘\n' use/${PKG}.c; \
+	fi
diff --git a/build/prelude.mk b/build/prelude.mk
new file mode 100644
index 0000000..b235fa9
--- /dev/null
+++ b/build/prelude.mk
@@ -0,0 +1,133 @@
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# Common makefile utilities.  Compatible with both GNU make and most BSD makes.
+
+# BSD make will chdir into ${.OBJDIR} by default, unless we tell it not to
+.OBJDIR: .
+
+# We don't use any suffix rules
+.SUFFIXES:
+
+# GNU make has $^ for the full list of targets, while BSD make has $> and the
+# long-form ${.ALLSRC}.  We could write $^ $> to get them both, but that would
+# break if one of them implemented support for the other.  So instead, bring
+# BSD's ${.ALLSRC} to GNU.
+.ALLSRC ?= $^
+
+# Installation paths
+DESTDIR ?=
+PREFIX ?= /usr
+MANDIR ?= ${PREFIX}/share/man
+
+# Configurable executables
+CC ?= cc
+INSTALL ?= install
+MKDIR ?= mkdir -p
+PKG_CONFIG ?= pkg-config
+RM ?= rm -f
+
+# GNU and BSD make have incompatible syntax for conditionals, but we can do a
+# lot with just nested variable expansion.  We use "y" as the canonical
+# truthy value, and "" (the empty string) as the canonical falsey value.
+#
+# To normalize a boolean, use ${TRUTHY,${VAR}}, which expands like this:
+#
+#     VAR=y      ${TRUTHY,${VAR}} => ${TRUTHY,y}     => y
+#     VAR=1      ${TRUTHY,${VAR}} => ${TRUTHY,1}     => y
+#     VAR=n      ${TRUTHY,${VAR}} => ${TRUTHY,n}     =>   [empty]
+#     VAR=other  ${TRUTHY,${VAR}} => ${TRUTHY,other} =>   [empty]
+#     VAR=       ${TRUTHY,${VAR}} => ${TRUTHY,}      =>   [emtpy]
+#
+# Inspired by https://github.com/wahern/autoguess
+TRUTHY,y := y
+TRUTHY,1 := y
+
+# Boolean operators are also implemented with nested expansion
+NOT,  := y
+
+# Normalize ${V} to either "y" or ""
+IS_V := ${TRUTHY,${V}}
+
+# Suppress output unless V=1
+Q, := @
+Q  := ${Q,${IS_V}}
+
+# Show full commands with `make V=1`, otherwise short summaries
+MSG = @msg() { \
+          MSG="$$1"; \
+          shift; \
+          test "${IS_V}" || printf '%s\n' "$$MSG"; \
+          test "$${1:-}" || return 0; \
+          test "${IS_V}" && printf '%s\n' "$$*"; \
+          "$$@"; \
+      }; \
+      msg
+
+# Maximum width of a short message, to align the ✔/✘
+MSG_WIDTH := 30
+
+# cat a file if V=1
+VCAT,y := @cat
+VCAT,  := @:
+VCAT   := ${VCAT,${IS_V}}
+
+# All external dependencies
+ALL_PKGS := \
+    libacl \
+    libcap \
+    libselinux \
+    liburing \
+    oniguruma
+
+# List all object files here, as they're needed by both `./configure` and `make`
+
+# All object files except the entry point
+LIBBFS := \
+    obj/src/alloc.o \
+    obj/src/bar.o \
+    obj/src/bfstd.o \
+    obj/src/bftw.o \
+    obj/src/color.o \
+    obj/src/ctx.o \
+    obj/src/diag.o \
+    obj/src/dir.o \
+    obj/src/dstring.o \
+    obj/src/eval.o \
+    obj/src/exec.o \
+    obj/src/expr.o \
+    obj/src/fsade.o \
+    obj/src/ioq.o \
+    obj/src/mtab.o \
+    obj/src/opt.o \
+    obj/src/parse.o \
+    obj/src/printf.o \
+    obj/src/pwcache.o \
+    obj/src/stat.o \
+    obj/src/thread.o \
+    obj/src/trie.o \
+    obj/src/typo.o \
+    obj/src/xregex.o \
+    obj/src/xspawn.o \
+    obj/src/xtime.o \
+    obj/gen/version.o
+
+# Unit test objects
+UNIT_OBJS := \
+    obj/tests/alloc.o \
+    obj/tests/bfstd.o \
+    obj/tests/bit.o \
+    obj/tests/ioq.o \
+    obj/tests/main.o \
+    obj/tests/trie.o \
+    obj/tests/xspawn.o \
+    obj/tests/xtime.o
+
+# All object files
+OBJS := \
+    obj/src/main.o \
+    obj/tests/mksock.o \
+    obj/tests/xspawnee.o \
+    obj/tests/xtouch.o \
+    ${LIBBFS} \
+    ${UNIT_OBJS}
diff --git a/build/use/libacl.c b/build/use/libacl.c
new file mode 100644
index 0000000..de1fe50
--- /dev/null
+++ b/build/use/libacl.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	acl_free(0);
+	return 0;
+}
diff --git a/build/use/libcap.c b/build/use/libcap.c
new file mode 100644
index 0000000..58e832c
--- /dev/null
+++ b/build/use/libcap.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	cap_free(0);
+	return 0;
+}
diff --git a/build/use/libselinux.c b/build/use/libselinux.c
new file mode 100644
index 0000000..bca409d
--- /dev/null
+++ b/build/use/libselinux.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	freecon(0);
+	return 0;
+}
diff --git a/build/use/liburing.c b/build/use/liburing.c
new file mode 100644
index 0000000..bea499a
--- /dev/null
+++ b/build/use/liburing.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	io_uring_free_probe(0);
+	return 0;
+}
diff --git a/build/use/oniguruma.c b/build/use/oniguruma.c
new file mode 100644
index 0000000..cb17596
--- /dev/null
+++ b/build/use/oniguruma.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes 
+// SPDX-License-Identifier: 0BSD
+
+#include 
+
+int main(void) {
+	onig_free(0);
+	return 0;
+}
diff --git a/config/cc.sh b/config/cc.sh
deleted file mode 100755
index 45d51ca..0000000
--- a/config/cc.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/sh
-
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Run the compiler and check if it succeeded
-
-set -eu
-
-TMP=$(mktemp)
-trap 'rm -f "$TMP"' EXIT
-
-(
-    set -x
-    $XCC $XCPPFLAGS $XCFLAGS $XLDFLAGS "$@" $XLDLIBS -o "$TMP"
-)
diff --git a/config/config.mk b/config/config.mk
deleted file mode 100644
index 280c6ac..0000000
--- a/config/config.mk
+++ /dev/null
@@ -1,63 +0,0 @@
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Makefile fragment that implements `make config`
-
-include config/prelude.mk
-include config/exports.mk
-
-# All configuration steps
-config: ${CONFIG} ${GEN}/config.h
-.PHONY: config
-
-# Makefile fragments generated by `make config`
-MKS := \
-    ${GEN}/vars.mk \
-    ${GEN}/flags.mk \
-    ${GEN}/deps.mk \
-    ${GEN}/pkgs.mk
-
-# The main configuration file, which includes the others
-${CONFIG}: ${MKS}
-	${MSG} "[ GEN] ${TGT}"
-	@printf '# %s\n' "${TGT}" >$@
-	@printf 'include $${GEN}/%s\n' ${MKS:${GEN}/%=%} >>$@
-	${VCAT} ${CONFIG}
-.PHONY: ${CONFIG}
-
-# Saves the configurable variables
-${GEN}/vars.mk::
-	@${MKDIR} ${@D}
-	${MSG} "[ GEN] ${TGT}"
-	@printf '# %s\n' "${TGT}" >$@
-	@printf 'PREFIX := %s\n' "$$XPREFIX" >>$@
-	@printf 'MANDIR := %s\n' "$$XMANDIR" >>$@
-	@printf 'OS := %s\n' "$${OS:-$$(uname)}" >>$@
-	@printf 'CC := %s\n' "$$XCC" >>$@
-	@printf 'INSTALL := %s\n' "$$XINSTALL" >>$@
-	@printf 'MKDIR := %s\n' "$$XMKDIR" >>$@
-	@printf 'PKG_CONFIG := %s\n' "$$XPKG_CONFIG" >>$@
-	@printf 'RM := %s\n' "$$XRM" >>$@
-	@printf 'PKGS :=\n' >>$@
-	${VCAT} $@
-
-# Sets the build flags.  This depends on vars.mk and uses a recursive make so
-# that the default flags can depend on variables like ${OS}.
-${GEN}/flags.mk: ${GEN}/vars.mk
-	@+${MAKE} -sf config/flags.mk $@
-.PHONY: ${GEN}/flags.mk
-
-# Check for dependency generation support
-${GEN}/deps.mk: ${GEN}/flags.mk
-	@+${MAKE} -sf config/deps.mk $@
-.PHONY: ${GEN}/deps.mk
-
-# Auto-detect dependencies and their build flags
-${GEN}/pkgs.mk: ${GEN}/flags.mk
-	@+${MAKE} -sf config/pkgs.mk $@
-.PHONY: ${GEN}/pkgs.mk
-
-# Compile-time feature detection
-${GEN}/config.h: ${CONFIG}
-	@+${MAKE} -sf config/header.mk $@
-.PHONY: ${GEN}/config.h
diff --git a/config/define-if.sh b/config/define-if.sh
deleted file mode 100755
index 059c1ac..0000000
--- a/config/define-if.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/sh
-
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Output a C preprocessor definition based on whether a command succeeds
-
-set -eu
-
-SLUG="${1#config/}"
-SLUG="${SLUG%.c}"
-MACRO="BFS_$(printf '%s' "$SLUG" | tr '/a-z-' '_A-Z_')"
-shift
-
-if "$@"; then
-    printf '#define %s true\n' "$MACRO"
-else
-    printf '#define %s false\n' "$MACRO"
-    exit 1
-fi
diff --git a/config/deps.mk b/config/deps.mk
deleted file mode 100644
index ac394a5..0000000
--- a/config/deps.mk
+++ /dev/null
@@ -1,18 +0,0 @@
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Makefile that generates gen/deps.mk
-
-include config/prelude.mk
-include ${GEN}/vars.mk
-include ${GEN}/flags.mk
-include config/exports.mk
-
-${GEN}/deps.mk::
-	${MSG} "[ GEN] ${TGT}"
-	printf '# %s\n' "${TGT}" >$@
-	if config/cc.sh -MD -MP -MF /dev/null config/empty.c; then \
-	    printf 'DEPFLAGS = -MD -MP\n'; \
-	fi >>$@ 2>$@.log
-	${VCAT} $@
-	printf -- '-include %s\n' ${OBJS:.o=.d} >>$@
diff --git a/config/empty.c b/config/empty.c
deleted file mode 100644
index 4fa9a5b..0000000
--- a/config/empty.c
+++ /dev/null
@@ -1,6 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-int main(void) {
-	return 0;
-}
diff --git a/config/exports.mk b/config/exports.mk
deleted file mode 100644
index ed19134..0000000
--- a/config/exports.mk
+++ /dev/null
@@ -1,20 +0,0 @@
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Makefile fragment that exports variables used by configuration scripts
-
-export XPREFIX=${PREFIX}
-export XMANDIR=${MANDIR}
-
-export XCC=${CC}
-export XINSTALL=${INSTALL}
-export XMKDIR=${MKDIR}
-export XPKG_CONFIG=${PKG_CONFIG}
-export XRM=${RM}
-
-export XCPPFLAGS=${CPPFLAGS}
-export XCFLAGS=${CFLAGS}
-export XLDFLAGS=${LDFLAGS}
-export XLDLIBS=${LDLIBS}
-
-export XNOLIBS=${NOLIBS}
diff --git a/config/flags.mk b/config/flags.mk
deleted file mode 100644
index 837c30f..0000000
--- a/config/flags.mk
+++ /dev/null
@@ -1,136 +0,0 @@
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Makefile that generates gen/flags.mk
-
-include config/prelude.mk
-include ${GEN}/vars.mk
-
-# Configurable flags
-CPPFLAGS ?=
-CFLAGS ?= \
-    -g \
-    -Wall \
-    -Wformat=2 \
-    -Werror=implicit \
-    -Wimplicit-fallthrough \
-    -Wmissing-declarations \
-    -Wshadow \
-    -Wsign-compare \
-    -Wstrict-prototypes
-LDFLAGS ?=
-LDLIBS ?=
-
-export XCPPFLAGS=${CPPFLAGS}
-export XCFLAGS=${CFLAGS}
-export XLDFLAGS=${LDFLAGS}
-export XLDLIBS=${LDLIBS}
-
-# Immutable flags
-export BFS_CPPFLAGS= \
-    -Isrc \
-    -I${GEN} \
-    -D__EXTENSIONS__ \
-    -D_ATFILE_SOURCE \
-    -D_BSD_SOURCE \
-    -D_DARWIN_C_SOURCE \
-    -D_DEFAULT_SOURCE \
-    -D_GNU_SOURCE \
-    -D_POSIX_PTHREAD_SEMANTICS \
-    -D_FILE_OFFSET_BITS=64 \
-    -D_TIME_BITS=64
-export BFS_CFLAGS= -std=c17 -pthread
-
-# Platform-specific system libraries
-LDLIBS,DragonFly := -lposix1e
-LDLIBS,Linux := -lrt
-LDLIBS,NetBSD := -lutil
-LDLIBS,SunOS := -lsec -lsocket -lnsl
-export BFS_LDLIBS=${LDLIBS,${OS}}
-
-# Build profiles
-_ASAN := ${TRUTHY,${ASAN}}
-_LSAN := ${TRUTHY,${LSAN}}
-_MSAN := ${TRUTHY,${MSAN}}
-_TSAN := ${TRUTHY,${TSAN}}
-_UBSAN := ${TRUTHY,${UBSAN}}
-_GCOV := ${TRUTHY,${GCOV}}
-_LINT := ${TRUTHY,${LINT}}
-_RELEASE := ${TRUTHY,${RELEASE}}
-
-# https://github.com/google/sanitizers/issues/342
-TSAN_CPPFLAGS,y := -DBFS_USE_TARGET_CLONES=0
-export TSAN_CPPFLAGS=${TSAN_CPPFLAGS,${_TSAN}}
-
-ASAN_CFLAGS,y := -fsanitize=address
-LSAN_CFLAGS,y := -fsanitize=leak
-MSAN_CFLAGS,y := -fsanitize=memory -fsanitize-memory-track-origins
-TSAN_CFLAGS,y := -fsanitize=thread
-UBSAN_CFLAGS.y := -fsanitize=undefined
-
-export ASAN_CFLAGS=${ASAN_CFLAGS,${_ASAN}}
-export LSAN_CFLAGS=${LSAN_CFLAGS,${_LSAN}}
-export MSAN_CFLAGS=${MSAN_CFLAGS,${_MSAN}}
-export TSAN_CFLAGS=${TSAN_CFLAGS,${_TSAN}}
-export UBSAN_CFLAGS=${UBSAN_CFLAGS,${_UBSAN}}
-
-SAN_CFLAGS,y := -fno-sanitize-recover=all
-INSANE := ${NOT,${_ASAN}${_LSAN}${_MSAN}${_TSAN}${_UBSAN}}
-SAN := ${NOT,${INSANE}}
-export SAN_CFLAGS=${SAN_CFLAGS,${SAN}}
-
-# MSAN and TSAN both need all code to be instrumented
-YESLIBS := ${NOT,${_MSAN}${_TSAN}}
-NOLIBS ?= ${NOT,${YESLIBS}}
-export XNOLIBS=${NOLIBS}
-
-# gcov only intercepts fork()/exec() with -std=gnu*
-GCOV_CFLAGS,y := -std=gnu17 --coverage
-export GCOV_CFLAGS=${GCOV_CFLAGS,${_GCOV}}
-
-LINT_CPPFLAGS,y := -D_FORTIFY_SOURCE=3 -DBFS_LINT
-LINT_CFLAGS,y := -Werror -O2
-
-export LINT_CPPFLAGS=${LINT_CPPFLAGS,${_LINT}}
-export LINT_CFLAGS=${LINT_CFLAGS,${_LINT}}
-
-RELEASE_CPPFLAGS,y := -DNDEBUG
-RELEASE_CFLAGS,y := -O3 -flto=auto
-
-export RELEASE_CPPFLAGS=${RELEASE_CPPFLAGS,${_RELEASE}}
-export RELEASE_CFLAGS=${RELEASE_CFLAGS,${_RELEASE}}
-
-# Set a variable
-SETVAR = printf '%s := %s\n' >>$@
-
-# Append to a variable, if non-empty
-APPEND = append() { test -z "$$2" || printf '%s += %s\n' "$$1" "$$2" >>$@; }; append
-
-${GEN}/flags.mk::
-	${MSG} "[ GEN] ${TGT}"
-	printf '# %s\n' "${TGT}" >$@
-	${SETVAR} CPPFLAGS "$$BFS_CPPFLAGS"
-	${APPEND} CPPFLAGS "$$TSAN_CPPFLAGS"
-	${APPEND} CPPFLAGS "$$LINT_CPPFLAGS"
-	${APPEND} CPPFLAGS "$$RELEASE_CPPFLAGS"
-	${APPEND} CPPFLAGS "$$XCPPFLAGS"
-	${APPEND} CPPFLAGS "$$EXTRA_CPPFLAGS"
-	${SETVAR} CFLAGS "$$BFS_CFLAGS"
-	${APPEND} CFLAGS "$$ASAN_CFLAGS"
-	${APPEND} CFLAGS "$$LSAN_CFLAGS"
-	${APPEND} CFLAGS "$$MSAN_CFLAGS"
-	${APPEND} CFLAGS "$$TSAN_CFLAGS"
-	${APPEND} CFLAGS "$$UBSAN_CFLAGS"
-	${APPEND} CFLAGS "$$SAN_CFLAGS"
-	${APPEND} CFLAGS "$$GCOV_CFLAGS"
-	${APPEND} CFLAGS "$$LINT_CFLAGS"
-	${APPEND} CFLAGS "$$RELEASE_CFLAGS"
-	${APPEND} CFLAGS "$$XCFLAGS"
-	${APPEND} CFLAGS "$$EXTRA_CFLAGS"
-	${SETVAR} LDFLAGS "$$XLDFLAGS"
-	${SETVAR} LDLIBS "$$XLDLIBS"
-	${APPEND} LDLIBS "$$EXTRA_LDLIBS"
-	${APPEND} LDLIBS "$$BFS_LDLIBS"
-	${SETVAR} NOLIBS "$$XNOLIBS"
-	test "${OS}-${SAN}" != FreeBSD-y || printf 'POSTLINK = elfctl -e +noaslr $$@\n' >>$@
-	${VCAT} $@
diff --git a/config/has/acl-get-entry.c b/config/has/acl-get-entry.c
deleted file mode 100644
index 3cce771..0000000
--- a/config/has/acl-get-entry.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include 
-#include 
-
-int main(void) {
-	acl_t acl = acl_get_file(".", ACL_TYPE_DEFAULT);
-	acl_entry_t entry;
-	return acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
-}
diff --git a/config/has/acl-get-file.c b/config/has/acl-get-file.c
deleted file mode 100644
index 89fbf23..0000000
--- a/config/has/acl-get-file.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include 
-#include 
-#include 
-
-int main(void) {
-	acl_t acl = acl_get_file(".", ACL_TYPE_DEFAULT);
-	return acl == (acl_t)NULL;
-}
diff --git a/config/has/acl-get-tag-type.c b/config/has/acl-get-tag-type.c
deleted file mode 100644
index 2901956..0000000
--- a/config/has/acl-get-tag-type.c
+++ /dev/null
@@ -1,10 +0,0 @@
-#include 
-#include 
-#include 
-
-int main(void) {
-	acl_entry_t entry;
-	memset(&entry, 0, sizeof(entry));
-	acl_tag_t tag;
-	return acl_get_tag_type(entry, &tag);
-}
diff --git a/config/has/acl-is-trivial-np.c b/config/has/acl-is-trivial-np.c
deleted file mode 100644
index 9ca9fc7..0000000
--- a/config/has/acl-is-trivial-np.c
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-
-int main(void) {
-	acl_t acl = acl_get_fd(3);
-	int trivial;
-	acl_is_trivial_np(acl, &trivial);
-	return 0;
-}
diff --git a/config/has/acl-trivial.c b/config/has/acl-trivial.c
deleted file mode 100644
index 7efc838..0000000
--- a/config/has/acl-trivial.c
+++ /dev/null
@@ -1,8 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	return acl_trivial(".");
-}
diff --git a/config/has/aligned-alloc.c b/config/has/aligned-alloc.c
deleted file mode 100644
index 4460038..0000000
--- a/config/has/aligned-alloc.c
+++ /dev/null
@@ -1,8 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	return !aligned_alloc(_Alignof(void *), sizeof(void *));
-}
diff --git a/config/has/confstr.c b/config/has/confstr.c
deleted file mode 100644
index 58280b4..0000000
--- a/config/has/confstr.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	confstr(_CS_PATH, NULL, 0);
-	return 0;
-}
diff --git a/config/has/extattr-get-file.c b/config/has/extattr-get-file.c
deleted file mode 100644
index ac9cf96..0000000
--- a/config/has/extattr-get-file.c
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-#include 
-
-int main(void) {
-	return extattr_get_file("file", EXTATTR_NAMESPACE_USER, "xattr", NULL, 0);
-}
diff --git a/config/has/extattr-get-link.c b/config/has/extattr-get-link.c
deleted file mode 100644
index c35be5b..0000000
--- a/config/has/extattr-get-link.c
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-#include 
-
-int main(void) {
-	return extattr_get_link("link", EXTATTR_NAMESPACE_USER, "xattr", NULL, 0);
-}
diff --git a/config/has/extattr-list-file.c b/config/has/extattr-list-file.c
deleted file mode 100644
index e68a8bb..0000000
--- a/config/has/extattr-list-file.c
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-#include 
-
-int main(void) {
-	return extattr_list_file("file", EXTATTR_NAMESPACE_USER, NULL, 0);
-}
diff --git a/config/has/extattr-list-link.c b/config/has/extattr-list-link.c
deleted file mode 100644
index 49f0ec2..0000000
--- a/config/has/extattr-list-link.c
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-#include 
-
-int main(void) {
-	return extattr_list_link("link", EXTATTR_NAMESPACE_USER, NULL, 0);
-}
diff --git a/config/has/fdclosedir.c b/config/has/fdclosedir.c
deleted file mode 100644
index f4ad1f5..0000000
--- a/config/has/fdclosedir.c
+++ /dev/null
@@ -1,8 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	return fdclosedir(opendir("."));
-}
diff --git a/config/has/getdents.c b/config/has/getdents.c
deleted file mode 100644
index d0d4228..0000000
--- a/config/has/getdents.c
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	struct dirent de;
-	getdents(3, &de, 1024);
-	return 0;
-}
diff --git a/config/has/getdents64-syscall.c b/config/has/getdents64-syscall.c
deleted file mode 100644
index 4838c14..0000000
--- a/config/has/getdents64-syscall.c
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-#include 
-
-int main(void) {
-	struct dirent64 de;
-	syscall(SYS_getdents64, 3, &de, 1024);
-	return 0;
-}
diff --git a/config/has/getdents64.c b/config/has/getdents64.c
deleted file mode 100644
index 1abf36d..0000000
--- a/config/has/getdents64.c
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	struct dirent64 de;
-	getdents64(3, &de, 1024);
-	return 0;
-}
diff --git a/config/has/getprogname-gnu.c b/config/has/getprogname-gnu.c
deleted file mode 100644
index 6b97c5e..0000000
--- a/config/has/getprogname-gnu.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	const char *str = program_invocation_short_name;
-	return str[0];
-}
diff --git a/config/has/getprogname.c b/config/has/getprogname.c
deleted file mode 100644
index 83dc8e8..0000000
--- a/config/has/getprogname.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	const char *str = getprogname();
-	return str[0];
-}
diff --git a/config/has/max-align-t.c b/config/has/max-align-t.c
deleted file mode 100644
index 96165ce..0000000
--- a/config/has/max-align-t.c
+++ /dev/null
@@ -1,8 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	return _Alignof(max_align_t);
-}
diff --git a/config/has/pipe2.c b/config/has/pipe2.c
deleted file mode 100644
index 4cb43b5..0000000
--- a/config/has/pipe2.c
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-
-int main(void) {
-	int fds[2];
-	return pipe2(fds, O_CLOEXEC);
-}
diff --git a/config/has/posix-spawn-addfchdir-np.c b/config/has/posix-spawn-addfchdir-np.c
deleted file mode 100644
index b870a53..0000000
--- a/config/has/posix-spawn-addfchdir-np.c
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	posix_spawn_file_actions_t actions;
-	posix_spawn_file_actions_init(&actions);
-	posix_spawn_file_actions_addfchdir_np(&actions, 3);
-	return 0;
-}
diff --git a/config/has/posix-spawn-addfchdir.c b/config/has/posix-spawn-addfchdir.c
deleted file mode 100644
index c52ff81..0000000
--- a/config/has/posix-spawn-addfchdir.c
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	posix_spawn_file_actions_t actions;
-	posix_spawn_file_actions_init(&actions);
-	posix_spawn_file_actions_addfchdir(&actions, 3);
-	return 0;
-}
diff --git a/config/has/st-acmtim.c b/config/has/st-acmtim.c
deleted file mode 100644
index d687ab0..0000000
--- a/config/has/st-acmtim.c
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	struct stat sb = {0};
-	unsigned int a = sb.st_atim.tv_sec;
-	unsigned int c = sb.st_ctim.tv_sec;
-	unsigned int m = sb.st_mtim.tv_sec;
-	return a + c + m;
-}
diff --git a/config/has/st-acmtimespec.c b/config/has/st-acmtimespec.c
deleted file mode 100644
index f747bc0..0000000
--- a/config/has/st-acmtimespec.c
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	struct stat sb = {0};
-	unsigned int a = sb.st_atimespec.tv_sec;
-	unsigned int c = sb.st_ctimespec.tv_sec;
-	unsigned int m = sb.st_mtimespec.tv_sec;
-	return a + c + m;
-}
diff --git a/config/has/st-birthtim.c b/config/has/st-birthtim.c
deleted file mode 100644
index 4964571..0000000
--- a/config/has/st-birthtim.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	struct stat sb = {0};
-	return sb.st_birthtim.tv_sec;
-}
diff --git a/config/has/st-birthtimespec.c b/config/has/st-birthtimespec.c
deleted file mode 100644
index 91a613f..0000000
--- a/config/has/st-birthtimespec.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	struct stat sb = {0};
-	return sb.st_birthtimespec.tv_sec;
-}
diff --git a/config/has/st-flags.c b/config/has/st-flags.c
deleted file mode 100644
index b1d0c32..0000000
--- a/config/has/st-flags.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	struct stat sb = {0};
-	return sb.st_flags;
-}
diff --git a/config/has/statx-syscall.c b/config/has/statx-syscall.c
deleted file mode 100644
index 87ec869..0000000
--- a/config/has/statx-syscall.c
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-#include 
-#include 
-
-int main(void) {
-	struct statx sb;
-	syscall(SYS_statx, AT_FDCWD, ".", 0, STATX_BASIC_STATS, &sb);
-	return 0;
-}
diff --git a/config/has/statx.c b/config/has/statx.c
deleted file mode 100644
index 65f1674..0000000
--- a/config/has/statx.c
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-
-int main(void) {
-	struct statx sb;
-	statx(AT_FDCWD, ".", 0, STATX_BASIC_STATS, &sb);
-	return 0;
-}
diff --git a/config/has/strerror-l.c b/config/has/strerror-l.c
deleted file mode 100644
index 3dcc4d7..0000000
--- a/config/has/strerror-l.c
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-#include 
-
-int main(void) {
-	locale_t locale = duplocale(LC_GLOBAL_LOCALE);
-	return !strerror_l(ENOMEM, locale);
-}
diff --git a/config/has/strerror-r-gnu.c b/config/has/strerror-r-gnu.c
deleted file mode 100644
index 26ca0ee..0000000
--- a/config/has/strerror-r-gnu.c
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-
-int main(void) {
-	char buf[256];
-	// Check that strerror_r() returns a pointer
-	return *strerror_r(ENOMEM, buf, sizeof(buf));
-}
diff --git a/config/has/strerror-r-posix.c b/config/has/strerror-r-posix.c
deleted file mode 100644
index 41b2d30..0000000
--- a/config/has/strerror-r-posix.c
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-#include 
-
-int main(void) {
-	char buf[256];
-	// Check that strerror_r() returns an integer
-	return 2 * strerror_r(ENOMEM, buf, sizeof(buf));
-}
diff --git a/config/has/tm-gmtoff.c b/config/has/tm-gmtoff.c
deleted file mode 100644
index 543df48..0000000
--- a/config/has/tm-gmtoff.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	struct tm tm = {0};
-	return tm.tm_gmtoff;
-}
diff --git a/config/has/uselocale.c b/config/has/uselocale.c
deleted file mode 100644
index a712ff8..0000000
--- a/config/has/uselocale.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	locale_t locale = uselocale((locale_t)0);
-	return locale == LC_GLOBAL_LOCALE;
-}
diff --git a/config/header.mk b/config/header.mk
deleted file mode 100644
index 50ad5e8..0000000
--- a/config/header.mk
+++ /dev/null
@@ -1,69 +0,0 @@
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Makefile that generates gen/config.h
-
-include config/prelude.mk
-include ${GEN}/config.mk
-include config/exports.mk
-
-# All header fragments we generate
-HEADERS := \
-    ${GEN}/has/acl-get-entry.h \
-    ${GEN}/has/acl-get-file.h \
-    ${GEN}/has/acl-get-tag-type.h \
-    ${GEN}/has/acl-is-trivial-np.h \
-    ${GEN}/has/acl-trivial.h \
-    ${GEN}/has/aligned-alloc.h \
-    ${GEN}/has/confstr.h \
-    ${GEN}/has/extattr-get-file.h \
-    ${GEN}/has/extattr-get-link.h \
-    ${GEN}/has/extattr-list-file.h \
-    ${GEN}/has/extattr-list-link.h \
-    ${GEN}/has/fdclosedir.h \
-    ${GEN}/has/getdents.h \
-    ${GEN}/has/getdents64.h \
-    ${GEN}/has/getdents64-syscall.h \
-    ${GEN}/has/getprogname.h \
-    ${GEN}/has/getprogname-gnu.h \
-    ${GEN}/has/max-align-t.h \
-    ${GEN}/has/pipe2.h \
-    ${GEN}/has/posix-spawn-addfchdir.h \
-    ${GEN}/has/posix-spawn-addfchdir-np.h \
-    ${GEN}/has/st-acmtim.h \
-    ${GEN}/has/st-acmtimespec.h \
-    ${GEN}/has/st-birthtim.h \
-    ${GEN}/has/st-birthtimespec.h \
-    ${GEN}/has/st-flags.h \
-    ${GEN}/has/statx.h \
-    ${GEN}/has/statx-syscall.h \
-    ${GEN}/has/strerror-l.h \
-    ${GEN}/has/strerror-r-gnu.h \
-    ${GEN}/has/strerror-r-posix.h \
-    ${GEN}/has/tm-gmtoff.h \
-    ${GEN}/has/uselocale.h
-
-# Previously generated by pkgs.mk
-PKG_HEADERS := ${ALL_PKGS:%=${GEN}/use/%.h}
-
-${GEN}/config.h: ${PKG_HEADERS} ${HEADERS}
-	${MSG} "[ GEN] ${TGT}"
-	printf '// %s\n' "${TGT}" >$@
-	printf '#ifndef BFS_CONFIG_H\n' >>$@
-	printf '#define BFS_CONFIG_H\n' >>$@
-	cat ${.ALLSRC} >>$@
-	printf '#endif // BFS_CONFIG_H\n' >>$@
-	cat ${.ALLSRC:%=%.log} >$@.log
-	${VCAT} $@
-.PHONY: ${GEN}/config.h
-
-# The short name of the config test
-SLUG = ${@:${GEN}/%.h=%}
-
-${HEADERS}::
-	${MKDIR} ${@D}
-	if config/define-if.sh ${SLUG} config/cc.sh config/${SLUG}.c >$@ 2>$@.log; then \
-	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✔\n' ${SLUG}.c; \
-	else \
-	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✘\n' ${SLUG}.c; \
-	fi
diff --git a/config/pkgconf.sh b/config/pkgconf.sh
deleted file mode 100755
index 365ed61..0000000
--- a/config/pkgconf.sh
+++ /dev/null
@@ -1,100 +0,0 @@
-#!/bin/sh
-
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# pkg-config wrapper with hardcoded fallbacks
-
-set -eu
-
-MODE=
-case "${1:-}" in
-    --*)
-        MODE="$1"
-        shift
-esac
-
-if [ $# -lt 1 ]; then
-    exit
-fi
-
-case "$XNOLIBS" in
-    y|1)
-        exit 1
-esac
-
-if [ -z "$MODE" ]; then
-    # Check whether the libraries exist at all
-    for LIB; do
-        # Check ${USE_$LIB}
-        USE_LIB="USE_$(printf '%s' "$LIB" | tr 'a-z-' 'A-Z_')"
-        eval "USE=\"\${$USE_LIB:-}\""
-        case "$USE" in
-            y|1)
-                continue
-                ;;
-            n|0)
-                exit 1
-                ;;
-        esac
-
-        CFLAGS=$("$0" --cflags "$LIB") || exit 1
-        LDFLAGS=$("$0" --ldflags "$LIB") || exit 1
-        LDLIBS=$("$0" --ldlibs "$LIB") || exit 1
-        config/cc.sh $CFLAGS $LDFLAGS config/use/$LIB.c $LDLIBS || exit 1
-    done
-fi
-
-# Defer to pkg-config if possible
-if command -v "${XPKG_CONFIG:-}" >/dev/null 2>&1; then
-    case "$MODE" in
-        --cflags)
-            "$XPKG_CONFIG" --cflags "$@"
-            ;;
-        --ldflags)
-            "$XPKG_CONFIG" --libs-only-L --libs-only-other "$@"
-            ;;
-        --ldlibs)
-            "$XPKG_CONFIG" --libs-only-l "$@"
-            ;;
-    esac
-
-    exit
-fi
-
-# pkg-config unavailable, emulate it ourselves
-CFLAGS=""
-LDFLAGS=""
-LDLIBS=""
-
-for LIB; do
-    case "$LIB" in
-        libacl)
-            LDLIB=-lacl
-            ;;
-        libcap)
-            LDLIB=-lcap
-            ;;
-        libselinux)
-            LDLIB=-lselinux
-            ;;
-        liburing)
-            LDLIB=-luring
-            ;;
-        oniguruma)
-            LDLIB=-lonig
-            ;;
-        *)
-            printf 'error: Unknown package %s\n' "$LIB" >&2
-            exit 1
-            ;;
-    esac
-
-    LDLIBS="$LDLIBS$LDLIB "
-done
-
-case "$MODE" in
-    --ldlibs)
-        printf '%s\n' "$LDLIBS"
-    ;;
-esac
diff --git a/config/pkgs.mk b/config/pkgs.mk
deleted file mode 100644
index 898f262..0000000
--- a/config/pkgs.mk
+++ /dev/null
@@ -1,36 +0,0 @@
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Makefile that generates gen/pkgs.mk
-
-include config/prelude.mk
-include ${GEN}/vars.mk
-include ${GEN}/flags.mk
-include config/exports.mk
-
-HEADERS := ${ALL_PKGS:%=${GEN}/use/%.h}
-
-${GEN}/pkgs.mk: ${HEADERS}
-	${MSG} "[ GEN] ${TGT}"
-	printf '# %s\n' "${TGT}" >$@
-	gen() { \
-	    printf 'PKGS := %s\n' "$$*"; \
-	    printf 'CFLAGS += %s\n' "$$(config/pkgconf.sh --cflags "$$@")"; \
-	    printf 'LDFLAGS += %s\n' "$$(config/pkgconf.sh --ldflags "$$@")"; \
-	    printf 'LDLIBS := %s $${LDLIBS}\n' "$$(config/pkgconf.sh --ldlibs "$$@")"; \
-	}; \
-	gen $$(grep -l ' true$$' ${.ALLSRC} | sed 's|.*/\(.*\)\.h|\1|') >>$@
-	${VCAT} $@
-
-.PHONY: ${GEN}/pkgs.mk
-
-# Convert ${GEN}/use/foo.h to foo
-PKG = ${@:${GEN}/use/%.h=%}
-
-${HEADERS}::
-	${MKDIR} ${@D}
-	if config/define-if.sh use/${PKG} config/pkgconf.sh ${PKG} >$@ 2>$@.log; then \
-	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✔\n' use/${PKG}.c; \
-	else \
-	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✘\n' use/${PKG}.c; \
-	fi
diff --git a/config/prelude.mk b/config/prelude.mk
deleted file mode 100644
index 109e60c..0000000
--- a/config/prelude.mk
+++ /dev/null
@@ -1,162 +0,0 @@
-# Copyright © Tavian Barnes 
-# SPDX-License-Identifier: 0BSD
-
-# Common makefile utilities.  Compatible with both GNU make and most BSD makes.
-
-# BSD make will chdir into ${.OBJDIR} by default, unless we tell it not to
-.OBJDIR: .
-
-# We don't use any suffix rules
-.SUFFIXES:
-
-# GNU make has $^ for the full list of targets, while BSD make has $> and the
-# long-form ${.ALLSRC}.  We could write $^ $> to get them both, but that would
-# break if one of them implemented support for the other.  So instead, bring
-# BSD's ${.ALLSRC} to GNU.
-.ALLSRC ?= $^
-
-# For out-of-tree builds, e.g.
-#
-#     $ make config BUILDDIR=/path/to/build/dir
-#     $ make BUILDDIR=/path/to/build/dir
-BUILDDIR ?= .
-
-# Shorthand for build subdirectories
-BIN := ${BUILDDIR}/bin
-GEN := ${BUILDDIR}/gen
-OBJ := ${BUILDDIR}/obj
-
-# GNU make strips a leading ./ from target names, so do the same for BSD make
-BIN := ${BIN:./%=%}
-GEN := ${GEN:./%=%}
-OBJ := ${OBJ:./%=%}
-
-# The configuration file generated by `make config`
-CONFIG := ${GEN}/config.mk
-
-# Installation paths
-DESTDIR ?=
-PREFIX ?= /usr
-MANDIR ?= ${PREFIX}/share/man
-
-# GNU make supports `export VAR`, but BSD make requires `export VAR=value`.
-# Sadly, GNU make gives a recursion error on `export VAR=${VAR}`.
-_BUILDDIR := ${BUILDDIR}
-export BUILDDIR=${_BUILDDIR}
-
-# Configurable executables; can be overridden with
-#
-#     $ make config CC=clang
-CC ?= cc
-INSTALL ?= install
-MKDIR ?= mkdir -p
-PKG_CONFIG ?= pkg-config
-RM ?= rm -f
-
-# GNU and BSD make have incompatible syntax for conditionals, but we can do a
-# lot with just nested variable expansion.  We use "y" as the canonical
-# truthy value, and "" (the empty string) as the canonical falsey value.
-#
-# To normalize a boolean, use ${TRUTHY,${VAR}}, which expands like this:
-#
-#     VAR=y      ${TRUTHY,${VAR}} => ${TRUTHY,y}     => y
-#     VAR=1      ${TRUTHY,${VAR}} => ${TRUTHY,1}     => y
-#     VAR=n      ${TRUTHY,${VAR}} => ${TRUTHY,n}     =>   [empty]
-#     VAR=other  ${TRUTHY,${VAR}} => ${TRUTHY,other} =>   [empty]
-#     VAR=       ${TRUTHY,${VAR}} => ${TRUTHY,}      =>   [emtpy]
-#
-# Inspired by https://github.com/wahern/autoguess
-TRUTHY,y := y
-TRUTHY,1 := y
-
-# Boolean operators are also implemented with nested expansion
-NOT,  := y
-
-# Normalize ${V} to either "y" or ""
-IS_V := ${TRUTHY,${V}}
-
-# Suppress output unless V=1
-Q, := @
-Q  := ${Q,${IS_V}}
-
-# The current target, with ${BUILDDIR} stripped for shorter messages
-TGT = ${@:${BUILDDIR}/%=%}
-
-# Show full commands with `make V=1`, otherwise short summaries
-MSG = @msg() { \
-          MSG="$$1"; \
-          shift; \
-          test "${IS_V}" || printf '%s\n' "$$MSG"; \
-          test "$${1:-}" || return 0; \
-          test "${IS_V}" && printf '%s\n' "$$*"; \
-          "$$@"; \
-      }; \
-      msg
-
-# Maximum width of a short message, to align the ✔/✘
-MSG_WIDTH := 30
-
-# cat a file if V=1
-VCAT,y := @cat
-VCAT,  := @:
-VCAT   := ${VCAT,${IS_V}}
-
-# All external dependencies
-ALL_PKGS := \
-    libacl \
-    libcap \
-    libselinux \
-    liburing \
-    oniguruma
-
-# List all object files here, as they're needed by both `make config` and `make`
-
-# All object files except the entry point
-LIBBFS := \
-    ${OBJ}/src/alloc.o \
-    ${OBJ}/src/bar.o \
-    ${OBJ}/src/bfstd.o \
-    ${OBJ}/src/bftw.o \
-    ${OBJ}/src/color.o \
-    ${OBJ}/src/ctx.o \
-    ${OBJ}/src/diag.o \
-    ${OBJ}/src/dir.o \
-    ${OBJ}/src/dstring.o \
-    ${OBJ}/src/eval.o \
-    ${OBJ}/src/exec.o \
-    ${OBJ}/src/expr.o \
-    ${OBJ}/src/fsade.o \
-    ${OBJ}/src/ioq.o \
-    ${OBJ}/src/mtab.o \
-    ${OBJ}/src/opt.o \
-    ${OBJ}/src/parse.o \
-    ${OBJ}/src/printf.o \
-    ${OBJ}/src/pwcache.o \
-    ${OBJ}/src/stat.o \
-    ${OBJ}/src/thread.o \
-    ${OBJ}/src/trie.o \
-    ${OBJ}/src/typo.o \
-    ${OBJ}/src/xregex.o \
-    ${OBJ}/src/xspawn.o \
-    ${OBJ}/src/xtime.o \
-    ${OBJ}/gen/version.o
-
-# Unit test objects
-UNIT_OBJS := \
-    ${OBJ}/tests/alloc.o \
-    ${OBJ}/tests/bfstd.o \
-    ${OBJ}/tests/bit.o \
-    ${OBJ}/tests/ioq.o \
-    ${OBJ}/tests/main.o \
-    ${OBJ}/tests/trie.o \
-    ${OBJ}/tests/xspawn.o \
-    ${OBJ}/tests/xtime.o
-
-# All object files
-OBJS := \
-    ${OBJ}/src/main.o \
-    ${OBJ}/tests/mksock.o \
-    ${OBJ}/tests/xspawnee.o \
-    ${OBJ}/tests/xtouch.o \
-    ${LIBBFS} \
-    ${UNIT_OBJS}
diff --git a/config/use/libacl.c b/config/use/libacl.c
deleted file mode 100644
index de1fe50..0000000
--- a/config/use/libacl.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	acl_free(0);
-	return 0;
-}
diff --git a/config/use/libcap.c b/config/use/libcap.c
deleted file mode 100644
index 58e832c..0000000
--- a/config/use/libcap.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	cap_free(0);
-	return 0;
-}
diff --git a/config/use/libselinux.c b/config/use/libselinux.c
deleted file mode 100644
index bca409d..0000000
--- a/config/use/libselinux.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	freecon(0);
-	return 0;
-}
diff --git a/config/use/liburing.c b/config/use/liburing.c
deleted file mode 100644
index bea499a..0000000
--- a/config/use/liburing.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	io_uring_free_probe(0);
-	return 0;
-}
diff --git a/config/use/oniguruma.c b/config/use/oniguruma.c
deleted file mode 100644
index cb17596..0000000
--- a/config/use/oniguruma.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright © Tavian Barnes 
-// SPDX-License-Identifier: 0BSD
-
-#include 
-
-int main(void) {
-	onig_free(0);
-	return 0;
-}
diff --git a/configure b/configure
new file mode 100755
index 0000000..6920212
--- /dev/null
+++ b/configure
@@ -0,0 +1,98 @@
+#!/bin/sh
+
+# Copyright © Tavian Barnes 
+# SPDX-License-Identifier: 0BSD
+
+# bfs build configuration script
+
+set -eu
+
+help() {
+    cat <] [CC=...] [CFLAGS=...] [...]
+
+Compiler configuration:
+
+  CC
+      The C compiler to use
+  CPPFLAGS
+      C preprocessor flags
+  CFLAGS
+      C compiler flags
+  LDFLAGS
+      Linker flags
+  LDLIBS
+      Dynamic libraries to link
+
+  EXTRA_CPPFLAGS
+  EXTRA_CFLAGS
+  EXTRA_LDFLAGS
+  EXTRA_LDLIBS
+      Adds to the default flags, instead of replacing them
+
+Build profiles:
+
+  RELEASE=y
+      Enable optimizations, disable assertions
+  ASAN=y
+  LSAN=y
+  MSAN=y
+  TSAN=y
+  UBSAN=y
+      Enable sanitizers
+  GCOV=y
+      Enable code coverage instrumentation
+
+External dependencies:
+
+  PKG_CONFIG
+      The pkg-config binary to use
+
+  USE_LIBACL=[y|n]
+  USE_LIBCAP=[y|n]
+  USE_LIBSELINUX=[y|n]
+  USE_LIBURIG=[y|n]
+  USE_ONIGURUMA=[y|n]
+      Enable or disable external dependencies
+
+Packaging configuration:
+
+  PREFIX
+      Set the installation prefix (default: /usr)
+  MANDIR
+      Set the man page directory (default: \$PREFIX/share/man)
+EOF
+}
+
+for arg; do
+    case "$arg" in
+        --help)
+            help
+            exit 0
+            ;;
+        -*|*=*)
+            continue # make flag (-j2) or variable (CC=clang)
+            ;;
+        *)
+            printf 'error: Unrecognized option "%s"\n\n' "$arg" >&2
+            help >&2
+            exit 1
+            ;;
+    esac
+done
+
+# Get the relative path to the source tree based on how the script was run
+DIR=$(dirname -- "$0")
+
+# Set up symbolic links for out-of-tree builds
+for f in Makefile build completions docs src tests; do
+    test -e "$f" || ln -s "$DIR/$f" "$f"
+done
+
+# Infer -jN unless MAKEFLAGS is set
+j=
+if ! [ "${MAKEFLAGS+y}" ]; then
+    j="-j$({ nproc || sysctl -n hw.ncpu || getconf _NPROCESSORS_ONLN || echo 1; } 2>/dev/null)"
+fi
+
+${MAKE:-make} $j -rsf build/config.mk "$@"
diff --git a/docs/BUILDING.md b/docs/BUILDING.md
index 4ed139c..db5d721 100644
--- a/docs/BUILDING.md
+++ b/docs/BUILDING.md
@@ -4,10 +4,9 @@ Building `bfs`
 Compiling
 ---------
 
-`bfs` uses [GNU Make](https://www.gnu.org/software/make/) as its build system.
 A simple invocation of
 
-    $ make config
+    $ ./configure
     $ make
 
 should build `bfs` successfully.
@@ -18,7 +17,6 @@ For example, to use all your cores, run `make -j$(nproc)`.
 
 | Command          | Description                                                   |
 |------------------|---------------------------------------------------------------|
-| `make config`    | Configures the build system                                   |
 | `make`           | Builds just the `bfs` binary                                  |
 | `make all`       | Builds everything, including the tests (but doesn't run them) |
 | `make check`     | Builds everything, and runs the tests                         |
@@ -33,13 +31,13 @@ The configuration system provides a few shorthand flags for handy configurations
 
 | Command                 | Description                                                 |
 |-------------------------|-------------------------------------------------------------|
-| `make config RELEASE=y` | Build `bfs` with optimizations, LTO, and without assertions |
-| `make config ASAN=y`    | Enable [AddressSanitizer]                                   |
-| `make config LSAN=y`    | Enable [LeakSanitizer]                                      |
-| `make config MSAN=y`    | Enable [MemorySanitizer]                                    |
-| `make config TSAN=y`    | Enable [ThreadSanitizer]                                    |
-| `make config UBSAN=y`   | Enable [UndefinedBehaviorSanitizer]                         |
-| `make config GCOV=y`    | Enable [code coverage]                                      |
+| `./configure RELEASE=y` | Build `bfs` with optimizations, LTO, and without assertions |
+| `./configure ASAN=y`    | Enable [AddressSanitizer]                                   |
+| `./configure LSAN=y`    | Enable [LeakSanitizer]                                      |
+| `./configure MSAN=y`    | Enable [MemorySanitizer]                                    |
+| `./configure TSAN=y`    | Enable [ThreadSanitizer]                                    |
+| `./configure UBSAN=y`   | Enable [UndefinedBehaviorSanitizer]                         |
+| `./configure GCOV=y`    | Enable [code coverage]                                      |
 
 [AddressSanitizer]: https://github.com/google/sanitizers/wiki/AddressSanitizer
 [LeakSanitizer]: https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer#stand-alone-mode
@@ -48,21 +46,20 @@ The configuration system provides a few shorthand flags for handy configurations
 [UndefinedBehaviorSanitizer]: https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html
 [code coverage]: https://gcc.gnu.org/onlinedocs/gcc/Gcov.html
 
-You can combine multiple profiles (e.g. `make config ASAN=y UBSAN=y`), but not all of them will work together.
+You can combine multiple profiles (e.g. `./configure ASAN=y UBSAN=y`), but not all of them will work together.
 
 ### Flags
 
-Other flags can be specified on the `make config` command line or in the environment.
+Other flags can be specified on the `./configure` command line or in the environment.
 Here are some of the common ones; check the [`Makefile`](/Makefile) for more.
 
 | Flag                                | Description                                        |
 |-------------------------------------|----------------------------------------------------|
-| `CC`                                | The C compiler to use, e.g. `make config CC=clang` |
+| `CC`                                | The C compiler to use, e.g. `./configure CC=clang` |
 | `CFLAGS`
`EXTRA_CFLAGS`          | Override/add to the default compiler flags         |
 | `LDFLAGS`
`EXTRA_LDFLAGS`        | Override/add to the linker flags                   |
 | `USE_LIBACL`
`USE_LIBCAP`
... | Enable/disable [optional dependencies]             |
 | `TEST_FLAGS`                        | `tests.sh` flags for `make check`                  |
-| `BUILDDIR`                          | The build output directory (default: `.`)          |
 | `DESTDIR`                           | The root directory for `make install`              |
 | `PREFIX`                            | The installation prefix (default: `/usr`)          |
 | `MANDIR`                            | The man page installation directory                |
@@ -72,9 +69,9 @@ Here are some of the common ones; check the [`Makefile`](/Makefile) for more.
 ### Dependencies
 
 `bfs` depends on some system libraries for some of its features.
-These dependencies are optional, and can be turned off in `make config` if necessary by setting the appropriate variable to `n` (e.g. `make config USE_ONIGURUMA=n`).
+These dependencies are optional, and can be turned off in `./configure` if necessary by setting the appropriate variable to `n` (e.g. `./configure USE_ONIGURUMA=n`).
 
-| Dependency   | Platforms  | `make config` flag |
+| Dependency   | Platforms  | `./configure` flag |
 |--------------|------------|--------------------|
 | [libacl]     | Linux only | `USE_LIBACL`       |
 | [libcap]     | Linux only | `USE_LIBCAP`       |
@@ -90,22 +87,28 @@ These dependencies are optional, and can be turned off in `make config` if neces
 
 ### Dependency tracking
 
-The build system automatically tracks header dependencies with the `-M` family of compiler options (see `DEPFLAGS` in the [`Makefile`](/Makefile)).
+The build system automatically tracks header dependencies with the `-M` family of compiler options (see `DEPFLAGS` in [`build/deps.mk`](/build/deps.mk)).
 So if you edit a header file, `make` will rebuild the necessary object files ensuring they don't go out of sync.
 
 We also add a dependency on the current configuration, so you can change configurations and rebuild without having to `make clean`.
-
-We go one step further than most build systems by tracking the flags that were used for the previous compilation.
-That means you can change configurations without having to `make clean`.
 For example,
 
-    $ make config
+    $ ./configure
     $ make
-    $ make config RELEASE=y
+    $ ./configure RELEASE=y
     $ make
 
 will build the project in debug mode and then rebuild it in release mode.
 
+### Out-of-tree builds
+
+You can set up an out-of-tree build by running the `configure` script from another directory, for example:
+
+    $ mkdir out
+    $ cd out
+    $ ../configure
+    $ make
+
 
 Testing
 -------
diff --git a/tests/util.sh b/tests/util.sh
index 7dba9fb..3969db5 100644
--- a/tests/util.sh
+++ b/tests/util.sh
@@ -12,12 +12,9 @@ _realpath() (
 )
 
 # Globals
-TESTS=$(_realpath "$TESTS")
-if [ "${BUILDDIR-}" ]; then
-    BIN=$(_realpath "$BUILDDIR/bin")
-else
-    BIN=$(_realpath "$TESTS/../bin")
-fi
+ROOT=$(_realpath "$(dirname -- "$TESTS")")
+TESTS="$ROOT/tests"
+BIN="$ROOT/bin"
 MKSOCK="$BIN/tests/mksock"
 XTOUCH="$BIN/tests/xtouch"
 UNAME=$(uname)
diff --git a/tests/xspawn.c b/tests/xspawn.c
index 7362aa5..785ea48 100644
--- a/tests/xspawn.c
+++ b/tests/xspawn.c
@@ -64,27 +64,20 @@ static bool check_use_path(bool use_posix) {
 		spawn.flags &= ~BFS_SPAWN_USE_POSIX;
 	}
 
-	const char *builddir = getenv("BUILDDIR");
-	dchar *bin = dstrprintf("%s/bin", builddir ? builddir : ".");
-	ret &= bfs_pcheck(bin, "dstrprintf()");
-	if (!ret) {
-		goto destroy;
-	}
-
-	ret &= bfs_pcheck(bfs_spawn_addopen(&spawn, 10, bin, O_RDONLY | O_DIRECTORY, 0) == 0);
+	ret &= bfs_pcheck(bfs_spawn_addopen(&spawn, 10, "bin", O_RDONLY | O_DIRECTORY, 0) == 0);
 	ret &= bfs_pcheck(bfs_spawn_adddup2(&spawn, 10, 11) == 0);
 	ret &= bfs_pcheck(bfs_spawn_addclose(&spawn, 10) == 0);
 	ret &= bfs_pcheck(bfs_spawn_addfchdir(&spawn, 11) == 0);
 	ret &= bfs_pcheck(bfs_spawn_addclose(&spawn, 11) == 0);
 	if (!ret) {
-		goto bin;
+		goto destroy;
 	}
 
 	// Check that $PATH is resolved in the parent's environment
 	char **envp;
 	ret &= bfs_pcheck(envp = envdup());
 	if (!ret) {
-		goto bin;
+		goto destroy;
 	}
 
 	// Check that $PATH is resolved after the file actions
@@ -138,8 +131,6 @@ env:
 		free(*var);
 	}
 	free(envp);
-bin:
-	dstrfree(bin);
 destroy:
 	ret &= bfs_pcheck(bfs_spawn_destroy(&spawn) == 0);
 out:
-- 
cgit v1.2.3


From 99260d347b91f9f7ede335b7f582cee34ead2b0c Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Wed, 1 May 2024 14:23:20 -0400
Subject: build: Add some nice aliases to ./configure

---
 .github/workflows/ci.yml      |   4 +-
 .github/workflows/codecov.yml |   2 +-
 Makefile                      |  10 +--
 build/header.mk               |   2 +-
 configure                     | 141 ++++++++++++++++++-----------
 docs/BUILDING.md              | 200 ++++++++++++++++++++++++++----------------
 6 files changed, 221 insertions(+), 138 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 57f59f4..e47600b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -107,7 +107,7 @@ jobs:
                 gmake \
                 oniguruma
             jobs=$(sysctl -n hw.ncpu)
-            MAKE=gmake ./configure
+            ./configure MAKE=gmake
             gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
   netbsd:
@@ -198,5 +198,5 @@ jobs:
             PATH="/usr/xpg4/bin:$PATH"
             chown -R action:staff .
             jobs=$(getconf NPROCESSORS_ONLN)
-            sudo -u action MAKE=gmake ./configure
+            sudo -u action ./configure MAKE=gmake
             sudo -u action gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index bb68927..6aaace6 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -25,7 +25,7 @@ jobs:
 
       - name: Generate coverage
         run: |
-          ./configure GCOV=y
+          ./configure --enable-gcov
           make -j$(nproc) check TEST_FLAGS="--sudo"
           gcov -abcfpu obj/*/*.o
 
diff --git a/Makefile b/Makefile
index cd8bb55..8a8ec6b 100644
--- a/Makefile
+++ b/Makefile
@@ -164,11 +164,11 @@ distcheck:
 .PHONY: distcheck
 
 # Per-distcheck configuration
-DISTCHECK_CONFIG_asan := ASAN=y UBSAN=y
-DISTCHECK_CONFIG_msan := MSAN=y UBSAN=y CC=clang
-DISTCHECK_CONFIG_tsan := TSAN=y UBSAN=y CC=clang
+DISTCHECK_CONFIG_asan := --enable-asan --enable-ubsan
+DISTCHECK_CONFIG_msan := --enable-msan --enable-ubsan CC=clang
+DISTCHECK_CONFIG_tsan := --enable-tsan --enable-ubsan CC=clang
 DISTCHECK_CONFIG_m32 := EXTRA_CFLAGS="-m32" PKG_CONFIG_LIBDIR=/usr/lib32/pkgconfig
-DISTCHECK_CONFIG_release := RELEASE=y
+DISTCHECK_CONFIG_release := --enable-release
 
 ${DISTCHECKS}::
 	@${MKDIR} $@
@@ -195,7 +195,7 @@ install::
 	${MSG} "[INST] completions/bfs.zsh" \
 	    ${INSTALL} -m644 completions/bfs.zsh ${DEST_PREFIX}/share/zsh/site-functions/_bfs
 	${Q}${MKDIR} ${DEST_PREFIX}/share/fish/vendor_completions.d
-		${MSG} "[INST] completions/bfs.fish" \
+	${MSG} "[INST] completions/bfs.fish" \
 	    ${INSTALL} -m644 completions/bfs.fish ${DEST_PREFIX}/share/fish/vendor_completions.d/bfs.fish
 
 uninstall::
diff --git a/build/header.mk b/build/header.mk
index 951f09b..a9157ad 100644
--- a/build/header.mk
+++ b/build/header.mk
@@ -53,7 +53,7 @@ gen/config.h: ${PKG_HEADERS} ${HEADERS}
 	@printf '#define BFS_CONFIG_H\n' >>$@
 	@cat ${.ALLSRC} >>$@
 	@printf '#endif // BFS_CONFIG_H\n' >>$@
-	@cat ${.ALLSRC:%=%.log} >$@.log
+	@cat ${.ALLSRC:%=%.log} >gen/config.log
 	${VCAT} $@
 .PHONY: gen/config.h
 
diff --git a/configure b/configure
index 830628a..d42dec3 100755
--- a/configure
+++ b/configure
@@ -7,75 +7,117 @@
 
 set -eu
 
-help() {
-    cat <] [CC=...] [CFLAGS=...] [...]
+# Default to `make`
+MAKE="${MAKE:-make}"
 
-Compiler configuration:
+# Pass -j$(nproc) unless MAKEFLAGS is set
+if [ "${MAKEFLAGS+y}" ]; then
+    j=""
+else
+    j="-j$({ nproc || sysctl -n hw.ncpu || getconf _NPROCESSORS_ONLN || echo 1; } 2>/dev/null)"
+fi
+
+for arg; do
+    case "$arg" in
+        -h|--help)
+            cat <&2
+                    printf 'Run %s --help for more information.\n' "$0" >&2
+                    exit 1
+                    ;;
+            esac
+            ;;
+
+        --prefix=*)
+            shift
+            set -- "$@" "PREFIX=${arg#*=}"
+            ;;
+
+        MAKE=*)
+            MAKE="${arg#*=}"
+            shift
+            ;;
+
+        # make flag (-j2) or variable (CC=clang)
         -*|*=*)
-            continue # make flag (-j2) or variable (CC=clang)
+            continue
             ;;
+
         *)
             printf 'error: Unrecognized option "%s"\n\n' "$arg" >&2
-            help >&2
+            printf 'Run %s --help for more information.\n' "$0" >&2
             exit 1
             ;;
     esac
@@ -89,10 +131,7 @@ for f in Makefile build completions docs src tests; do
     test -e "$f" || ln -s "$DIR/$f" "$f"
 done
 
-# Infer -jN unless MAKEFLAGS is set
-j=
-if ! [ "${MAKEFLAGS+y}" ]; then
-    j="-j$({ nproc || sysctl -n hw.ncpu || getconf _NPROCESSORS_ONLN || echo 1; } 2>/dev/null)"
-fi
+# Set MAKEFLAGS to -j$(nproc) if it's unset
+export MAKEFLAGS="${MAKEFLAGS-$j}"
 
-${MAKE:-make} $j -rf build/config.mk "$@"
+$MAKE -rf build/config.mk "$@"
diff --git a/docs/BUILDING.md b/docs/BUILDING.md
index db5d721..cb33c51 100644
--- a/docs/BUILDING.md
+++ b/docs/BUILDING.md
@@ -1,104 +1,101 @@
 Building `bfs`
 ==============
 
-Compiling
----------
-
 A simple invocation of
 
     $ ./configure
     $ make
 
 should build `bfs` successfully.
-As usual with `make`, you can run a [parallel build](https://www.gnu.org/software/make/manual/html_node/Parallel.html) with `-j`.
-For example, to use all your cores, run `make -j$(nproc)`.
 
-### Targets
 
-| Command          | Description                                                   |
-|------------------|---------------------------------------------------------------|
-| `make`           | Builds just the `bfs` binary                                  |
-| `make all`       | Builds everything, including the tests (but doesn't run them) |
-| `make check`     | Builds everything, and runs the tests                         |
-| `make install`   | Installs `bfs` (with man page, shell completions, etc.)       |
-| `make uninstall` | Uninstalls `bfs`                                              |
-| `make clean`     | Delete the build products                                     |
-| `make distclean` | Delete all generated files, including the build configuration |
+Configuration
+-------------
+
+```console
+$ ./configure --help
+Usage:
+
+  $ ./configure [--enable-*|--disable-*] [CC=...] [CFLAGS=...] [...]
+  $ make
+
+...
+```
+
+### Variables
+
+Variables set in the environment or on the command line will be picked up:
+These variables specify binaries to run during the configuration and build process:
+
+
+MAKE=make
+    make implementation
+CC=cc
+    C compiler
+INSTALL=install
+    Copy files during make install
+MKDIR="mkdir -p"
+    Create directories
+PKG_CONFIG=pkg-config
+    Detect external libraries and required build flags
+RM="rm -f"
+    Delete files
+

+
+These flags will be used by the build process:
+
+
+CPPFLAGS="-I... -D..."
+CFLAGS="-W... -f..."
+LDFLAGS="-L... -Wl,..."
+    Preprocessor/compiler/linker flags
+
+LDLIBS="-l... -l..."
+    Dynamic libraries to link
+
+EXTRA_{CPPFLAGS,CFLAGS,LDFLAGS,LDLIBS}="..."
+    Adds to the default flags, instead of replacing them
+

 
 ### Build profiles
 
-The configuration system provides a few shorthand flags for handy configurations:
-
-| Command                 | Description                                                 |
-|-------------------------|-------------------------------------------------------------|
-| `./configure RELEASE=y` | Build `bfs` with optimizations, LTO, and without assertions |
-| `./configure ASAN=y`    | Enable [AddressSanitizer]                                   |
-| `./configure LSAN=y`    | Enable [LeakSanitizer]                                      |
-| `./configure MSAN=y`    | Enable [MemorySanitizer]                                    |
-| `./configure TSAN=y`    | Enable [ThreadSanitizer]                                    |
-| `./configure UBSAN=y`   | Enable [UndefinedBehaviorSanitizer]                         |
-| `./configure GCOV=y`    | Enable [code coverage]                                      |
-
-[AddressSanitizer]: https://github.com/google/sanitizers/wiki/AddressSanitizer
-[LeakSanitizer]: https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer#stand-alone-mode
-[MemorySanitizer]: https://github.com/google/sanitizers/wiki/MemorySanitizer
-[ThreadSanitizer]: https://github.com/google/sanitizers/wiki/ThreadSanitizerCppManual
-[UndefinedBehaviorSanitizer]: https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html
-[code coverage]: https://gcc.gnu.org/onlinedocs/gcc/Gcov.html
-
-You can combine multiple profiles (e.g. `./configure ASAN=y UBSAN=y`), but not all of them will work together.
-
-### Flags
-
-Other flags can be specified on the `./configure` command line or in the environment.
-Here are some of the common ones; check the [`Makefile`](/Makefile) for more.
-
-| Flag                                | Description                                        |
-|-------------------------------------|----------------------------------------------------|
-| `CC`                                | The C compiler to use, e.g. `./configure CC=clang` |
-| `CFLAGS`
`EXTRA_CFLAGS`          | Override/add to the default compiler flags         |
-| `LDFLAGS`
`EXTRA_LDFLAGS`        | Override/add to the linker flags                   |
-| `USE_LIBACL`
`USE_LIBCAP`
... | Enable/disable [optional dependencies]             |
-| `TEST_FLAGS`                        | `tests.sh` flags for `make check`                  |
-| `DESTDIR`                           | The root directory for `make install`              |
-| `PREFIX`                            | The installation prefix (default: `/usr`)          |
-| `MANDIR`                            | The man page installation directory                |
-
-[optional dependencies]: #dependencies
+The default flags result in a plain debug build.
+Other build profiles can be enabled:
 
-### Dependencies
+
+--enable-release
+    Enable optimizations, disable assertions
 
-`bfs` depends on some system libraries for some of its features.
-These dependencies are optional, and can be turned off in `./configure` if necessary by setting the appropriate variable to `n` (e.g. `./configure USE_ONIGURUMA=n`).
+--enable-asan
+--enable-lsan
+--enable-msan
+--enable-tsan
+--enable-ubsan
+    Enable sanitizers
 
-| Dependency   | Platforms  | `./configure` flag |
-|--------------|------------|--------------------|
-| [libacl]     | Linux only | `USE_LIBACL`       |
-| [libcap]     | Linux only | `USE_LIBCAP`       |
-| [liburing]   | Linux only | `USE_LIBURING`     |
-| [libselinux] | Linux only | `USE_LIBSELINUX`   |
-| [Oniguruma]  | All        | `USE_ONIGURUMA`    |
+--enable-gcov
+    Enable code coverage instrumentation
+

 
-[libacl]: https://savannah.nongnu.org/projects/acl
-[libcap]: https://sites.google.com/site/fullycapable/
-[libselinux]: https://github.com/SELinuxProject/selinux
-[liburing]: https://github.com/axboe/liburing
-[Oniguruma]: https://github.com/kkos/oniguruma
+You can combine multiple profiles (e.g. `./configure --enable-asan --enable-ubsan`), but not all of them will work together.
 
-### Dependency tracking
+### Dependencies
 
-The build system automatically tracks header dependencies with the `-M` family of compiler options (see `DEPFLAGS` in [`build/deps.mk`](/build/deps.mk)).
-So if you edit a header file, `make` will rebuild the necessary object files ensuring they don't go out of sync.
+`bfs` depends on some system libraries for some of its features.
+External dependencies are auto-detected by default, but you can `--enable` or `--disable` them manually:
 
-We also add a dependency on the current configuration, so you can change configurations and rebuild without having to `make clean`.
-For example,
+
+--enable-libacl      --disable-libacl
+--enable-libcap      --disable-libcap
+--enable-libselinux  --disable-libselinux
+--enable-liburing    --disable-liburing
+--enable-oniguruma   --disable-oniguruma
+

 
-    $ ./configure
-    $ make
-    $ ./configure RELEASE=y
-    $ make
+[`pkg-config`] is used, if available, to detect these libraries and any additional build flags they may require.
+If this is undesireable, disable it by setting `PKG_CONFIG` to the empty string (`./configure PKG_CONFIG=""`).
 
-will build the project in debug mode and then rebuild it in release mode.
+[`pkg-config`]: https://www.freedesktop.org/wiki/Software/pkg-config/
 
 ### Out-of-tree builds
 
@@ -110,6 +107,53 @@ You can set up an out-of-tree build by running the `configure` script from anoth
     $ make
 
 
+Building
+--------
+
+### Targets
+
+The [`Makefile`](/Makefile) supports several different build targets:
+
+
+make
+    The default target; builds just the bfs binary
+make all
+    Builds everything, including the tests (but doesn't run them)
+
+make check
+    Builds everything, and runs all tests
+make unit-tests
+    Builds and runs the unit tests
+make integration-tests
+    Builds and runs the integration tests
+make distcheck
+    Builds and runs the tests in multiple different configurations
+
+make install
+    Installs bfs globally
+make uninstall
+    Uninstalls bfs
+
+make clean
+    Deletes all built files
+make distclean
+    Also deletes files generated by ./configure
+

+
+
+Troubleshooting
+---------------
+
+If the build fails or behaves unexpectedly, start by enabling verbose mode:
+
+    $ ./configure V=1
+    $ make V=1
+
+This will print the generated configuration and the exact commands that are executed.
+
+You can also check the file `gen/config.log`, which contains any errors from commands run during the configuration phase.
+
+
 Testing
 -------
 
-- 
cgit v1.2.3


From 83a8e57e24c403eb1110bddd59e9f80d57fe04ab Mon Sep 17 00:00:00 2001
From: Tavian Barnes 
Date: Tue, 7 May 2024 14:17:25 -0400
Subject: ci: Save config.log files

---
 .github/workflows/ci.yml | 35 ++++++++++++++++++++++++++++++-----
 1 file changed, 30 insertions(+), 5 deletions(-)

(limited to '.github/workflows/ci.yml')

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e47600b..1d4196e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,6 +41,11 @@ jobs:
         run: |
           make -j$(nproc) distcheck
 
+      - uses: actions/upload-artifact@v4
+        with:
+          name: linux-config.log
+          path: distcheck-*/gen/config.log
+
   macos:
     name: macOS
 
@@ -73,7 +78,6 @@ jobs:
         with:
           operating_system: freebsd
           version: "14.0"
-          sync_files: runner-to-vm
 
           run: |
             sudo pkg install -y \
@@ -85,6 +89,11 @@ jobs:
             sudo mount -t fdescfs none /dev/fd
             make -j$(nproc) distcheck
 
+      - uses: actions/upload-artifact@v4
+        with:
+          name: freebsd-config.log
+          path: distcheck-*/gen/config.log
+
   openbsd:
     name: OpenBSD
 
@@ -98,7 +107,6 @@ jobs:
         with:
           operating_system: openbsd
           version: "7.5"
-          sync_files: runner-to-vm
 
           run: |
             sudo pkg_add \
@@ -110,6 +118,11 @@ jobs:
             ./configure MAKE=gmake
             gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
+      - uses: actions/upload-artifact@v4
+        with:
+          name: openbsd-config.log
+          path: gen/config.log
+
   netbsd:
     name: NetBSD
 
@@ -123,7 +136,6 @@ jobs:
         with:
           operating_system: netbsd
           version: "10.0"
-          sync_files: runner-to-vm
 
           run: |
             PATH="/sbin:/usr/sbin:$PATH"
@@ -136,6 +148,11 @@ jobs:
             ./configure
             make -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
+      - uses: actions/upload-artifact@v4
+        with:
+          name: netbsd-config.log
+          path: gen/config.log
+
   dragonflybsd:
     name: DragonFly BSD
 
@@ -149,7 +166,6 @@ jobs:
         with:
           release: "6.4.0"
           usesh: true
-          copyback: false
 
           prepare: |
             pkg install -y \
@@ -168,6 +184,11 @@ jobs:
             sudo -u action ./configure
             sudo -u action make -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
 
+      - uses: actions/upload-artifact@v4
+        with:
+          name: dragonfly-config.log
+          path: gen/config.log
+
   omnios:
     name: OmniOS
 
@@ -181,7 +202,6 @@ jobs:
         with:
           release: "r151048"
           usesh: true
-          copyback: false
 
           prepare: |
             pkg install \
@@ -200,3 +220,8 @@ jobs:
             jobs=$(getconf NPROCESSORS_ONLN)
             sudo -u action ./configure MAKE=gmake
             sudo -u action gmake -j$jobs check TEST_FLAGS="--sudo --verbose=skipped"
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: omnios-config.log
+          path: gen/config.log
-- 
cgit v1.2.3