tools/perf/build: Improve the 'stackprotector' feature test

Namhyung Kim noticed that the stackprotector testcase was incomplete:

  > The flag being checked should be -"W"stack-protector instead of
  > -"f"stack-protector.  And the gcc manpage says that -Wstack-protector is
  > only active when -fstack-protector is active.  So the end result should
  > look like
  >
  >         $(BUILD) -Werror -fstack-protector -Wstack-protector

Add -Wstack-protector.

Reported-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 2eb83467cca2d3fb51d936b0d14a5048a0548167..c70d23ecb64e69b4593b4b31872d09b505608808 100644 (file)
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -45,7 +45,7 @@ test-stackprotector-all:
        $(BUILD) -Werror -fstack-protector-all
 
 test-stackprotector:
-       $(BUILD) -Werror -fstack-protector
+       $(BUILD) -Werror -fstack-protector -Wstack-protector
 
 test-fortify-source:
        $(BUILD) -O2 -Werror -D_FORTIFY_SOURCE=2