[PATCH 2/7] perf tools: Define _GNU_SOURCE on pthread_attr_setaffinity_np feature check

Arnaldo Carvalho de Melo
2015-02-25T21:06:03Z

From: Josh Boyer <jwboyer@fedoraproject.org>

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@fedoraproject.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Link: http://lkml.kernel.org/r/20150211162404.GA15522@hansolo.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.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 42ac05aaf8ac..b32ff3372514 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
--
1.9.3