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, 162 deletions

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 <tavianator@tavianator.com>
-# 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}