include config.h before stdio.h & other system headers

Ensures definitions like _GNU_SOURCE are visible when needed.

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/pf.c b/pf.c
index 0eb0f55..3f0c3f4 100644
--- a/pf.c
+++ b/pf.c
@@ -26,6 +26,10 @@ from The Open Group.
 
 */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <X11/Xos.h>
 #include <X11/Xlib.h>
 #include <stdio.h>