[AC_MSG_ERROR([libgthread-2.0 is missing, usually provided by glib-2.x])])
AC_CHECK_LIB([gdk-x11-2.0], [gdk_window_get_state], [],
[AC_MSG_ERROR([gdk-x11-2.0 is missing, usually provided by gtk+-2.x])])
[AC_MSG_ERROR([libgthread-2.0 is missing, usually provided by glib-2.x])])
AC_CHECK_LIB([gdk-x11-2.0], [gdk_window_get_state], [],
[AC_MSG_ERROR([gdk-x11-2.0 is missing, usually provided by gtk+-2.x])])