[PATCH v3 05/17] perf build: Enable additional Clang thread-safety flags

[Ian Rogers <irogers@google.com>]

Align tools/perf's Clang thread-safety flags with the kernel's
scripts/Makefile.context-analysis by adding -Wthread-safety-pointer,
-Wthread-safety-beta, and (when supported by the compiler)
-fexperimental-late-parse-attributes.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/Makefile.config | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 39442577418e..ce746b12f901 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -64,7 +64,13 @@ ifeq ($(CC_NO_CLANG), 0)
   endif
 
   # Enabled Wthread-safety analysis for clang builds.
-  CFLAGS += -Wthread-safety -DWARN_CONTEXT_ANALYSIS
+  CFLAGS += -DWARN_CONTEXT_ANALYSIS -Wthread-safety
+  ifeq ($(shell $(CC) -Werror -Wthread-safety-pointer -Wthread-safety-beta -c -x c /dev/null -o /dev/null >/dev/null 2>&1 && echo 1), 1)
+    CFLAGS += -Wthread-safety-pointer -Wthread-safety-beta
+  endif
+  ifeq ($(shell $(CC) -Werror -fexperimental-late-parse-attributes -c -x c /dev/null -o /dev/null >/dev/null 2>&1 && echo 1), 1)
+    CFLAGS += -fexperimental-late-parse-attributes
+  endif
 endif
 
 include $(srctree)/tools/scripts/Makefile.arch
-- 
2.56.0.212.g129ede20d9-goog