I don't think there are. The best you can you is to have pkgconfig files pointing at your local version of libxul. You can use PKG_CONFIG_PATH to tell pkg-config where it should look for .pc files.
I don't think there are. The best you can you is to have pkgconfig files pointing at your local version of libxul. You can use PKG_CONFIG_PATH to tell pkg-config where it should look for .pc files.