+have_ffmpeg=yes
+PKG_CHECK_MODULES([libavformat], [libavformat], [true], [have_ffmpeg=no])
+PKG_CHECK_MODULES([libavutil], [libavutil], [true], [have_ffmpeg=no])
+AC_SUBST([have_ffmpeg])
+
+AS_IF([test "x$have_ffmpeg" = "xno" ],
+ [AC_MSG_WARN([FFmpeg libraries not found. ffmpeg_metacube_hack.so will not be built.])])
+