tools/perf/build: Split out feature check: 'stackprotector'

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-eyLYjhskzn6qxkoyjtjic4ap@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

tools/perf/config/Makefile

@@ -104,6 +104,7 @@ $(info done)
 FEATURE_TESTS =				\
 	hello				\
 	stackprotector-all		\
+	stackprotector			\
 	libnuma
 
 $(foreach test,$(FEATURE_TESTS),$(call feature_check,$(test),$(test)))
@@ -112,7 +113,7 @@ ifeq ($(feature-stackprotector-all), 1)
   CFLAGS += -fstack-protector-all
 endif
 
-ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -Werror -Wstack-protector,-Wstack-protector),y)
+ifeq ($(feature-stackprotector), 1)
   CFLAGS += -Wstack-protector
 endif
 

tools/perf/config/feature-checks/Makefile

@@ -2,6 +2,7 @@
 FILES=					\
 	test-hello			\
 	test-stackprotector-all		\
+	test-stackprotector		\
 	test-libnuma
 
 CC := $(CC) -MD
@@ -18,6 +19,9 @@ test-hello:
 test-stackprotector-all:
 	$(BUILD) -Werror -fstack-protector-all
 
+test-stackprotector:
+	$(BUILD) -Werror -fstack-protector
+
 test-libnuma:
 	$(BUILD) -lnuma
 

tools/perf/config/feature-checks/test-stackprotector.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(void)
+{
+	return puts("hi");
+}