From 3870e8a3f6b4c3e9c1d4646e933365a586d375db Mon Sep 17 00:00:00 2001
From: William Wold <wm@wmww.sh>
Date: Mon, 11 Feb 2019 15:25:06 -0500
Subject: Error if compiling panel-plug-private.h without X11 support

---
 libmate-panel-applet/panel-plug-private.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libmate-panel-applet/panel-plug-private.h b/libmate-panel-applet/panel-plug-private.h
index 0f5933f0..82e0ac05 100644
--- a/libmate-panel-applet/panel-plug-private.h
+++ b/libmate-panel-applet/panel-plug-private.h
@@ -20,6 +20,12 @@
 #ifndef PANEL_PLUG_PRIVATE_H
 #define PANEL_PLUG_PRIVATE_H
 
+#ifdef PACKAGE_NAME // only check HAVE_X11 if config.h has been included
+#ifndef HAVE_X11
+#error file should only be included when HAVE_X11 is enabled
+#endif
+#endif
+
 #include <gtk/gtk.h>
 #include <gtk/gtkx.h>
 
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