change SDL linking to work with newer SDL versions again

[micropolis] / src / sim / sdl_helper

SDLINCLUDE="`pkg-config --cflags sdl 2>/dev/null`"
SDLLIBS="`pkg-config --libs-only-L sdl 2>/dev/null` `pkg-config --libs-only-l sdl 2>/dev/null`"

found=0

if echo '#include <SDL_mixer.h>'|(cpp ${SDLINCLUDE}) >/dev/null 2>&1; then
	found=1
else
	for flag in ${SDLINCLUDE}; do
		if echo "${flag}" | grep '^-I' >/dev/null 2>&1; then
			sdlpath="$(echo "${flag}"| sed -e 's/^-I//')"
			if [ -f "${sdlpath}/SDL_mixer.h" ]; then
				found=1
				break
			fi
		fi
	done
fi

if [ "${found}" = "1" ]; then
	SDLINCLUDE="${SDLINCLUDE} -DWITH_SDL_MIXER"
	SDLLIBS="${SDLLIBS} -lSDL_mixer"
else
	found=0

	for sdlpath in /usr /usr/local /opt/local /opt/csw /sw; do
		if [ -f "${sdlpath}/include/SDL/SDL_mixer.h" ]; then
			SDLINCLUDE="${SDLINCLUDE} -I${sdlpath}/include/SDL -DWITH_SDL_MIXER"
			SDLLIBS="${SDLLIBS} -L${sdlpath}/lib -lSDL -lSDL_mixer"

			found=1
			break
		fi
	done

	if [ "${found}" = "0" ]; then
		SDLINCLUDE=""
		SDLLIBS=""
	fi
fi

if [ "${1}" = "cflags" ]; then
	echo "${SDLINCLUDE}"
elif [ "${1}" = "libs" ]; then
	echo "${SDLLIBS}"
fi