From 6e37197ec673fb9601294edd45a7bbcddf8774af Mon Sep 17 00:00:00 2001
From: sgerwk <sgerwk@aol.com>
Date: Thu, 18 Mar 2021 18:12:15 +0100
Subject: [PATCH] enable _GNU_SOURCE where available

---
 config2.h.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config2.h.in b/config2.h.in
index b6288e93..0b0bb9b8 100644
--- a/config2.h.in
+++ b/config2.h.in
@@ -919,7 +919,7 @@
 #endif
 /* Enable GNU extensions on systems that have them.  */
 #ifndef _GNU_SOURCE
-# undef _GNU_SOURCE
+# define _GNU_SOURCE
 #endif
 /* Enable threading extensions on Solaris.  */
 #ifndef _POSIX_PTHREAD_SEMANTICS