configure: Use AC_GNU_SOURCE

[petitboot] / discover / udev.c

diff --git a/discover/udev.c b/discover/udev.c
index 305df95f4f4dd71f0783eb0755a76cc298a212f9..09c24fdf5912791e67fc093878a2918abc32e27b 100644 (file)
--- a/discover/udev.c
+++ b/discover/udev.c
@@ -1,5 +1,7 @@
 
-#define _GNU_SOURCE
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
 
 #include <assert.h>
 #include <errno.h>