On TARGET_LINUX define _GNU_SOURCE if not defined

This is to include peercred support on hosts where _GNU_SOURCE is not
defined by default.  This issue has been found on Gentoo with glibc-2.8.

The solution was discussed on the IRC meeting March 4, 2010
in #openvpn-discussions.
<http://thread.gmane.org/gmane.network.openvpn.devel/3242>

Signed-off-by: David Sommerseth <dazo@users.sourceforge.net>
Acked-by: James Yonan <james@openvpn.net>

diff --git a/syshead.h b/syshead.h
index bc54ce0e4d9d187ee7e6d0c16f1066fdbf846860..0a3eb143f1442c789d9d7f88c1015f3b7e6460c9 100644 (file)
--- a/syshead.h
+++ b/syshead.h
@@ -85,6 +85,10 @@
 #endif
 
 #ifdef HAVE_SYS_SOCKET_H
+# if defined(TARGET_LINUX) && !defined(_GNU_SOURCE)
+   /* needed for peercred support on glibc-2.8 */
+#  define _GNU_SOURCE
+# endif
 #include <sys/socket.h>
 #endif