-##### SDL_image #####
-website="http://www.libsdl.org/projects/SDL_image/"
-AC_CHECK_HEADERS([SDL/SDL_image.h],,
- [missing=yes
- echo "***** Missing SDL_image header ($website) *****"])
-AC_SEARCH_LIBS([IMG_Load], [SDL_image],,
- [missing=yes
- echo "***** Missing libSDL_image ($website) *****"])
+##### liblua #####
+website="http://www.lua.org/"
+PKG_CHECK_MODULES([LUA], [lua],
+ [LIBS="$LIBS $LUA_LIBS"
+ CFLAGS="$CFLAGS $LUA_CFLAGS"
+ CXXFLAGS="$CXXFLAGS $LUA_CFLAGS"],
+ [missing=yes
+ echo "***** Missing liblua ($website) *****"])
+
+##### libpng #####
+website="http://www.libpng.org/pub/png/libpng.html"
+PKG_CHECK_MODULES([PNG], [libpng],
+ [LIBS="$LIBS $PNG_LIBS"
+ CFLAGS="$CFLAGS $PNG_CFLAGS"
+ CXXFLAGS="$CXXFLAGS $PNG_CFLAGS"],
+ [missing=yes
+ echo "***** Missing libpng ($website) *****"])