1 files changed, 176 insertions, 0 deletions
diff --git a/config.sh b/config.sh
new file mode 100644
index 0000000..5f15de3
--- /dev/null
+++ b/config.sh
@@ -0,0 +1,176 @@
+outdir=${OUTDIR:-.build}
+srcdir=${SRCDIR:-$(dirname "$0")}
+AR=${AR:-ar}
+AS=${AS:-as}
+CC=${CC:-cc}
+CFLAGS=${CFLAGS:-}
+LD=${LD:-ld}
+SCDOC=${SCDOC:-scdoc}
+
+for arg
+do
+	# TODO: Add args for install directories
+	case "$arg" in
+		--prefix=*)
+			PREFIX=${arg#*=}
+			;;
+	esac
+done
+
+subdir() {
+	eval ". $srcdir/$1/configure"
+}
+
+genrules() {
+	target="$1"
+	shift
+	printf '# Begin generated rules for %s\n' "$target"
+	for file in "$@"
+	do
+		ext="${file#*.}"
+		file="${file%.*}"
+		deps=
+		printf '%s.o: %s.%s%s\n' "$file" "$file" "$ext" "$deps"
+	done
+	printf '%s_objects=\\\n' "$target"
+	n=0
+	for file in "$@"
+	do
+		file="${file%.*}"
+		n=$((n+1))
+		if [ $n -eq $# ]
+		then
+			printf '\t%s.o\n' "$file"
+		else
+			printf '\t%s.o \\\n' "$file"
+		fi
+	done
+	printf '# End generated rules for %s\n' "$target"
+}
+
+append_cflags() {
+	for flag
+	do
+		CFLAGS="$(printf '%s \\\n\t%s' "$CFLAGS" "$flag")"
+	done
+}
+
+test_cflags() {
+	[ ! -e "$outdir"/check.c ] && cat <<-EOF > "$outdir"/check.c
+	int main(void) { return 0; }
+	EOF
+	werror=""
+	case "$CFLAGS" in
+		*-Werror*)
+			werror="-Werror"
+			;;
+	esac
+	if $CC $werror "$@" -o /dev/null "$outdir"/check.c >/dev/null 2>&1
+	then
+		append_cflags "$@"
+	else
+		return 1
+	fi
+}
+
+find_library() {
+	name="$1"
+	pc="$2"
+	printf "Checking for %s... " "$name"
+	if ! pkg-config "$pc" 2>/dev/null
+	then
+		printf "NOT FOUND\n"
+		printf "Tried pkg-config %s\n" "$pc"
+		return 1
+	fi
+	printf "OK\n"
+	CFLAGS="$CFLAGS $(pkg-config --cflags "$pc")"
+	LIBS="$LIBS $(pkg-config --libs "$pc")"
+}
+
+docs() { true; }
+
+run_configure() {
+	mkdir -p $outdir
+
+	for flag in -g -std=c11 -D_XOPEN_SOURCE=700 -Wall -Wextra -Werror -pedantic
+	do
+		printf "Checking for %s... " "$flag"
+		if test_cflags "$flag"
+		then
+			echo yes
+		else
+			echo no
+		fi
+	done
+
+	find_library OpenSSL libssl
+	find_library OpenSSL libcrypto
+
+	printf "Checking for scdoc... "
+	if scdoc -v >/dev/null 2>&1
+	then
+		echo yes
+		all="$all docs"
+	else
+		echo no
+	fi
+
+	printf "Creating $outdir/config.mk... "
+	cat <<-EOF > "$outdir"/config.mk
+	CC=$CC
+	SCDOC=$SCDOC
+	LIBS=$LIBS
+	PREFIX=${PREFIX:-/usr/local}
+	OUTDIR=${outdir}
+	_INSTDIR=\$(DESTDIR)\$(PREFIX)
+	BINDIR?=${BINDIR:-\$(_INSTDIR)/bin}
+	LIBDIR?=${LIBDIR:-\$(_INSTDIR)/lib}
+	MANDIR?=${MANDIR:-\$(_INSTDIR)/share/man}
+	CACHE=\$(OUTDIR)/cache
+	CFLAGS=${CFLAGS}
+	CFLAGS+=-Iinclude -I\$(OUTDIR)
+	CFLAGS+=-DPREFIX='"\$(PREFIX)"'
+	CFLAGS+=-DLIBDIR='"\$(LIBDIR)"'
+
+	all: ${all}
+	EOF
+
+	for target in $all
+	do
+		$target >>"$outdir"/config.mk
+	done
+	echo done
+
+	touch $outdir/cppcache
+
+	if [ "$srcdir" = "." ]
+	then
+		return
+	fi
+
+	populate() (
+		path="$1"
+		mkdir -p "${path#$srcdir/}"
+		fullpath() ( cd "$1" && pwd )
+		for orig in "$path"/*
+		do
+			link="${orig#$srcdir/}"
+			if [ -d "$orig" ]
+			then
+				mkdir -p $link
+				populate "$orig"
+			elif [ -f "$orig" ]
+			then
+				ln -sf "$(fullpath "$path")"/"$(basename "$orig")" "$link"
+			fi
+		done
+	)
+
+	printf "Populating build dir... "
+	populate "$srcdir/include"
+	populate "$srcdir/src"
+	populate "$srcdir/doc"
+	ln -sf "$srcdir"/Makefile ./
+	echo done
+}