From 1ea6f99efd8ae61fce68c97a9cf9f722cfbca3ad Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@kernel.org>
Date: Mon, 7 Oct 2013 09:38:28 +0200
Subject: [PATCH] tools/perf/build: Split out feature check: 'fortify-source'

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-wicrcLCy2wkalka7iwsuzgpb@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 tools/perf/config/Makefile                             | 3 ++-
 tools/perf/config/feature-checks/Makefile              | 4 ++++
 tools/perf/config/feature-checks/test-fortify-source.c | 6 ++++++
 3 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 tools/perf/config/feature-checks/test-fortify-source.c

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index a3de2f8bd61a..7a614f92ce8c 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -106,6 +106,7 @@ FEATURE_TESTS =				\
 	stackprotector-all		\
 	stackprotector			\
 	volatile-register-var		\
+	fortify-source			\
 	libnuma
 
 $(foreach test,$(FEATURE_TESTS),$(call feature_check,$(test),$(test)))
@@ -123,7 +124,7 @@ ifeq ($(feature-volatile-register-var), 1)
 endif
 
 ifndef PERF_DEBUG
-  ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -D_FORTIFY_SOURCE=2,-D_FORTIFY_SOURCE=2),y)
+  ifeq ($(feature-fortify-source), 1)
     CFLAGS += -D_FORTIFY_SOURCE=2
   endif
 endif
diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 5693299b4806..529317e6009b 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -4,6 +4,7 @@ FILES=					\
 	test-stackprotector-all		\
 	test-stackprotector		\
 	test-volatile-register-var	\
+	test-fortify-source		\
 	test-libnuma
 
 CC := $(CC) -MD
@@ -26,6 +27,9 @@ test-stackprotector:
 test-volatile-register-var:
 	$(BUILD) -Werror -Wvolatile-register-var
 
+test-fortify-source:
+	$(BUILD) -O2 -Werror -D_FORTIFY_SOURCE=2
+
 test-libnuma:
 	$(BUILD) -lnuma
 
diff --git a/tools/perf/config/feature-checks/test-fortify-source.c b/tools/perf/config/feature-checks/test-fortify-source.c
new file mode 100644
index 000000000000..c9f398d87868
--- /dev/null
+++ b/tools/perf/config/feature-checks/test-fortify-source.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(void)
+{
+	return puts("hi");
+}