From 3e3848349b753d78a0b1d19648fb394866856bda Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Wed, 5 Aug 2015 08:48:08 +0200
Subject: [PATCH] ipc: enable _GNU_SOURCE to fix build with musl libc

This fixes compile the compile error:

> ipc.c:154:49: error: 'struct shm_info' has no member named 'used_ids'
>    ipc_submit_g("shm", "segments", NULL, shm_info.used_ids);
>                                                   ^

Fixes #1147
---
 src/ipc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ipc.c b/src/ipc.c
index 3763f248..b4038472 100644
--- a/src/ipc.c
+++ b/src/ipc.c
@@ -32,6 +32,9 @@
 #include "configfile.h"
 
 #if KERNEL_LINUX
+  /* _GNU_SOURCE is needed for struct shm_info.used_ids on musl libc */
+# define _GNU_SOURCE
+
   /* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
   /* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
   /* X/OPEN tells us to use <sys/{types,ipc,shm}.h> for shmctl() */
-- 
2.11.0