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.

1 files changed, 0 insertions, 136 deletions

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 <tavianator@tavianator.com>
-# 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} $@