From 99501e817cbc4f11cc045dbaa7a81854d4349335 Mon Sep 17 00:00:00 2001
From: drgler <daniel.kruegler@gmail.com>
Date: Thu, 1 Oct 2020 21:20:33 +0200
Subject: [PATCH] Ensure that _GNU_SOURCE is defined for NI_MAXHOST and
 NI_MAXSERV

Since glibc 2.8, these defines like `NI_MAXHOST` are exposed only
if suitable feature test macros are defined, namely: _GNU_SOURCE,
_DEFAULT_SOURCE (since glibc 2.19), or _BSD_SOURCE or _SVID_SOURCE
(before glibc 2.19), see GETNAMEINFO(3).

CLA: trivial
Fixes #13049

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/13054)
---
 crypto/bio/b_addr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/crypto/bio/b_addr.c b/crypto/bio/b_addr.c
index 46520031492..b7469bc7202 100644
--- a/crypto/bio/b_addr.c
+++ b/crypto/bio/b_addr.c
@@ -7,6 +7,10 @@
  * https://www.openssl.org/source/license.html
  */
 
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
+
 #include <assert.h>
 #include <string.h>
 
-- 
2.47.2