#!/bin/sh
# $Id$
FLAGS=""

feat_cross=false
feat_stb_image=true
feat_stb_truetype=false
feat_freetype2=true
feat_opengl=false
feat_vulkan=false
feat_vulkan_string_helper=true

for i in $@; do
	case "$i" in
		--help|-h)
			echo "Configuration utility for Milsko Toolkit"
			echo ""
			echo "Usage: $0 [options]"
			echo ""
			echo "Options:"
			echo "  -h --help    Display this help and exit"
			echo "     --cross   Indicate cross-compilation"
			echo ""
			echo "Features:"
			echo "  --enable-stb-image               Build and use stb_image instead of libjpeg/libpng"
			echo "  --enable-stb-truetype            Build stb_truetype"
			echo "  --enable-freetype2               Use FreeType2"
			echo "  --enable-opengl                  Build OpenGL widget"
			echo "  --enable-vulkan                  Build Vulkan widget"
			echo "  --disable-FEATURE                Do not use FEATURE"
			echo ""
			echo "  --without-vulkan-string-helper   Do not use Vulkan string helper"
			echo "  --without-FEATURE                Do not use FEATURE"
			exit 0
			;;
		--cross)
			feat_cross=true
			;;
		--enable-*|--disable-*)
			if [ "`echo $i | cut -d- -f3`" = "enable" ]; then
				eval feat_`echo $i | cut -d- -f4- | tr - _`=true
			else
				eval feat_`echo $i | cut -d- -f4- | tr - _`=false
			fi
			;;
		--with-*|--without-*)
			if [ "`echo $i | cut -d- -f3`" = "with" ]; then
				eval feat_`echo $i | cut -d- -f4- | tr - _`=true
			else
				eval feat_`echo $i | cut -d- -f4- | tr - _`=false
			fi
			;;
		*=*)
			eval $i
			;;
	esac
done

if $feat_cross; then
	FLAGS="$FLAGS -Dcross_build"
fi

if [ ! "x$CC" = "x" ]; then
	FLAGS="$FLAGS -Dcc=$CC"
fi

if $feat_vulkan_string_helper; then
	FLAGS="$FLAGS -Duse_vulkan_string_helper"
fi

if $feat_stb_image; then
	FLAGS="$FLAGS -Duse_stb_image"
fi

if $feat_stb_image; then
	FLAGS="$FLAGS -Duse_stb_image"
fi

if $feat_stb_truetype; then
	FLAGS="$FLAGS -Duse_stb_truetype"
fi

if $feat_opengl; then
	FLAGS="$FLAGS -Dbuild_opengl"
fi

if $feat_vulkan; then
	FLAGS="$FLAGS -Dbuild_vulkan"
fi

printf "Generating Makefile... "

if ! m4 $FLAGS Makefile.m4 > Makefile; then
	echo "(M4 exited with non-zero status)"
	rm -f Makefile
	exit 1
fi
echo "Done"

echo "Features:"
echo "  stb_image           : $feat_stb_image"
echo "  stb_truetype        : $feat_stb_truetype"
echo "  FreeType2           : $feat_freetype2"
echo "  OpenGL              : $feat_opengl"
echo "  Vulkan              : $feat_vulkan"
if $feat_vulkan; then
echo "  Vulkan String Helper: $feat_vulkan_string_helper"
fi