https://bugs.gentoo.org/871597
https://rt.cpan.org/Public/Bug/Display.html?id=124134

From 32cfda724ce867d1b4a3e581b4b305b300ddfed2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
Date: Fri, 19 Jan 2018 15:39:16 +0100
Subject: [PATCH] Use _DEFAULT_SOURCE instead of _BSD_SOURCE
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_BSD_SOURCE is deprecated in glibc since 2.20 version.

Signed-off-by: Petr Písař <ppisar@redhat.com>
---
 ifaddrlist.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ifaddrlist.c b/ifaddrlist.c
index 41183d3..0729b2b 100644
--- a/ifaddrlist.c
+++ b/ifaddrlist.c
@@ -1,5 +1,5 @@
 #ifdef   _LINUX_
-#define  _BSD_SOURCE 1
+#define  _DEFAULT_SOURCE 1
 #define  __FAVOR_BSD 1
 #endif
 
-- 
2.13.6