From fa4ee54284bba1b55e40101334b8770d96649fb9 Mon Sep 17 00:00:00 2001
From: Vincent Brillault <git@lerya.net>
Date: Fri, 22 Aug 2014 18:56:24 +0200
Subject: [PATCH] Turbostat: Explain why _GNU_SOURCE is required

---
 src/turbostat.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/turbostat.c b/src/turbostat.c
index 19f0786b..9337e90f 100644
--- a/src/turbostat.c
+++ b/src/turbostat.c
@@ -24,7 +24,17 @@
  * Ported to collectd by Vincent Brillault <git@lerya.net>
  */
 
+/*
+ * _GNU_SOURCE is required because of the following functions:
+ * - CPU_ISSET_S
+ * - CPU_ZERO_S
+ * - CPU_SET_S
+ * - CPU_FREE
+ * - CPU_ALLOC
+ * - CPU_ALLOC_SIZE
+ */
 #define _GNU_SOURCE
+
 #include <asm/msr-index.h>
 #include <stdarg.h>
 #include <stdio.h>
-- 
2.11.0