-AC_CHECK_HEADERS([png.h],,
- [missing=yes
- echo "***** Missing libpng header ($website) *****"])
-AC_SEARCH_LIBS([png_sig_cmp], [png],,
- [missing=yes
- echo "***** Missing libpng ($website) *****"])
+PKG_CHECK_MODULES([PNG], [libpng],
+ [LIBS="$LIBS $PNG_LIBS"
+ CFLAGS="$CFLAGS $PNG_CFLAGS"
+ CXXFLAGS="$CXXFLAGS $PNG_CFLAGS"],
+ [missing=yes
+ echo "***** Missing libpng ($website) *****"])
+
+##### openal #####
+website="http://connect.creativelabs.com/openal/"
+PKG_CHECK_MODULES([OPENAL], [openal],
+ [LIBS="$LIBS $OPENAL_LIBS"
+ CFLAGS="$CFLAGS $OPENAL_CFLAGS"
+ CXXFLAGS="$CXXFLAGS $OPENAL_CFLAGS"],
+ [missing=yes
+ echo "***** Missing OpenAL ($website) *****"])