linux-kernel - [tip:perf/urgent] perf tools: Define _GNU_SOURCE on pthread_attr_setaffinity

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Date:	Sun, 1 Mar 2015 08:49:44 -0800
From:	tip-bot for Josh Boyer <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	jwboyer@...oraproject.org, Vineet.Gupta1@...opsys.com,
	mingo@...nel.org, jolsa@...nel.org, a.p.zijlstra@...llo.nl,
	tglx@...utronix.de, acme@...hat.com, hpa@...or.com,
	linux-kernel@...r.kernel.org
Subject: [tip:perf/urgent] perf tools:
  Define _GNU_SOURCE on pthread_attr_setaffinity_np feature check

Commit-ID:  8eb733829cd17b9b66971f08110df7224d391d65
Gitweb:     http://git.kernel.org/tip/8eb733829cd17b9b66971f08110df7224d391d65
Author:     Josh Boyer <jwboyer@...oraproject.org>
AuthorDate: Wed, 11 Feb 2015 11:24:05 -0500
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 25 Feb 2015 12:17:38 -0300

perf tools: Define _GNU_SOURCE on pthread_attr_setaffinity_np feature check

The man page for pthread_attr_set_affinity_np states that _GNU_SOURCE
must be defined before pthread.h is included in order to get the proper
function declaration.  Define this in the Makefile.

Without this defined, the feature check fails on a Fedora system with
gcc5 and then the perf build later fails with conflicting prototypes for
the function.

Signed-off-by: Josh Boyer <jwboyer@...oraproject.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Vineet Gupta <Vineet.Gupta1@...opsys.com>
Link: http://lkml.kernel.org/r/20150211162404.GA15522@hansolo.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/config/feature-checks/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 42ac05a..b32ff33 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -49,7 +49,7 @@ test-hello.bin:
 	$(BUILD)
 
 test-pthread-attr-setaffinity-np.bin:
-	$(BUILD) -Werror -lpthread
+	$(BUILD) -D_GNU_SOURCE -Werror -lpthread
 
 test-stackprotector-all.bin:
 	$(BUILD) -Werror -fstack-protector-all
--
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