init commit

1 files changed, 94 insertions, 0 deletions

diff --git a/configure b/configure
new file mode 100755
index 0000000..2fa53e6
--- /dev/null
+++ b/configure
@@ -0,0 +1,94 @@
+#!/bin/bash
+
+libs=(luajit sdl2 pangoft2)
+CFLAGS+=(-std=c11 -fPIC)
+LDFLAGS+=(-shared)
+
+usage () {
+	echo "Usage: $0 [-h|options...]"
+}
+help () {
+	echo "Options:"
+	echo "  -B ldlib    Append ldlib to LDLIBS"
+	echo "  -C cflag    Append cflag to CFLAGS"
+	echo "  -L ldflag   Append ldflag to LDFLAGS"
+	echo "  -P cppflag  Append cppflag to CPPFLAGS"
+	echo "  -c when     Enable compiler colours (always|auto|off) [default: auto]"
+	echo "  -d          Enable debugging flags"
+	echo "  -e          Enable -Werror"
+	echo "  -h          Show this help"
+	echo "  -o          Enable optimisation flags"
+	echo "  -v          Print results of configuration"
+	echo "  -w          Enable warning flags"
+	echo "Environment:"
+	echo "  CC          C compiler"
+	echo "  PKG_CONFIG  pkg-config"
+}
+
+exists() {
+	command -v "$1" >/dev/null 2>&1
+}
+
+check() {
+	what=$1
+	shift
+	for p do
+		if exists "$p"; then
+			echo "$p"
+			return
+		fi
+	done
+	echo "$what not set or found" >&2
+	return 1
+}
+
+CC=$(check '$CC, cc, gcc or clang' "$CC" cc gcc clang) || exit
+pc=$(check '$PKG_CONFIG, pkg-config or pkg-conf' "$PKG_CONFIG" pkg-config pkg-conf) || exit
+
+for l in "${libs[@]}"; do
+	"$pc" --print-errors --exists "$l" || exit
+done
+CFLAGS+=($("$pc" --cflags-only-other "${libs[@]}"))
+CPPFLAGS+=($("$pc" --cflags-only-I "${libs[@]}"))
+LDFLAGS+=($("$pc" --libs-only-L --libs-only-other "${libs[@]}"))
+LDLIBS+=($("$pc" --libs-only-l "${libs[@]}"))
+
+colour=auto
+while getopts B:C:L:P:c:dehovw opt; do
+	case $opt in
+	B) LDLIBS+=("$OPTARG");;
+	C) CFLAGS+=("$OPTARG");;
+	L) LDFLAGS+=("$OPTARG");;
+	P) CPPFLAGS+=("$OPTARG");;
+	c) colour="$OPTARG";;
+	d)
+		CFLAGS+=(-Og -g)
+		LDFLAGS+=(-Og -g)
+		;;
+	e) CFLAGS+=(-Werror);;
+	h) usage; help; exit;;
+	o)
+		CFLAGS+=(-O2 -flto)
+		LDFLAGS+=(-O2 -flto)
+		;;
+	v) verbose=1;;
+	w) CFLAGS+=(-Wall -Wextra);;
+	?) usage >&2; exit 1;;
+	esac
+done
+if [[ $colour == auto ]] && exists tput && (( $(tput colors) >= 8 )); then
+	colour=always
+fi
+if [[ $colour == always ]]; then
+	CFLAGS+=(-fdiagnostics-color)
+fi
+
+{
+	echo "# generated using $0 $@"
+	echo "CC=$CC"
+	echo "CFLAGS=(${CFLAGS[@]@Q})"
+	echo "CPPFLAGS=(${CPPFLAGS[@]@Q})"
+	echo "LDFLAGS=(${LDFLAGS[@]@Q})"
+	echo "LDLIBS=(${LDLIBS[@]@Q})"
+} >.config.rc
+[[ $verbose ]] && cat .config.rc