Delete a redefine warning.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@7351 48e7efb5-ca39-0410-a469-dd3cf9ba447f

diff --git a/include/simgrid_config.h.in b/include/simgrid_config.h.in
index ca6c550..f82be86 100644 (file)
--- a/include/simgrid_config.h.in
+++ b/include/simgrid_config.h.in
@@ -26,7 +26,9 @@
 #include <stdio.h>  /* FILE*  */
 XBT_PUBLIC(long) getline(char **lineptr, size_t * n, FILE * stream);
 #else
-#define _GNU_SOURCE
+#ifndef _GNU_SOURCE
+       #define _GNU_SOURCE
+#endif
 #include <stdio.h>
 #endif