From cd2e4e342e1800f4ff1f63be5142af2babc7e14b Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Tue, 29 Oct 2002 19:37:28 +0000
Subject: [PATCH] Define _GNU_SOURCE.

---
 libasprintf/autosprintf.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libasprintf/autosprintf.cc b/libasprintf/autosprintf.cc
index b7b064b42..c145d5f33 100644
--- a/libasprintf/autosprintf.cc
+++ b/libasprintf/autosprintf.cc
@@ -17,6 +17,13 @@
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    USA.  */
 
+/* Tell glibc's <stdio.h> to provide a prototype for vasprintf().
+   This must come before <config.h> because <config.h> may include
+   <features.h>, and once <features.h> has been included, it's too late.  */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE    1
+#endif
+
 /* Specification.  */
 #include "autosprintf.h"
 
-- 
2.47.3