[tip:perf/core] perf python: Remove -fstack-clash-protection when building with some clang versions

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  a5dcc4ca9129f12a07722f41b6c5e8d7f71f4063
Gitweb:     https://git.kernel.org/tip/a5dcc4ca9129f12a07722f41b6c5e8d7f71f4063
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Fri, 18 Jan 2019 11:34:15 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 21 Jan 2019 17:38:56 -0300

perf python: Remove -fstack-clash-protection when building with some clang versions

These options are not present in some (all?) clang versions, so when we
build for a distro that has a gcc new enough to have these options and
that the distro python build config settings use them but clang doesn't
support, b00m.

This is the case with fedora rawhide (now gearing towards f30), so check
if clang has the  and remove the missing ones from CFLAGS.

Cc: Eduardo Habkost <ehabkost@xxxxxxxxxx>
Cc: Thiago Macieira <thiago.macieira@xxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-5q50q9w458yawgxf9ez54jbp@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/setup.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/setup.py b/tools/perf/util/setup.py
index 63f758c655d5..64d1f36dee99 100644
--- a/tools/perf/util/setup.py
+++ b/tools/perf/util/setup.py
@@ -17,6 +17,8 @@ if cc == "clang":
             vars[var] = sub("-mcet", "", vars[var])
         if not clang_has_option("-fcf-protection"):
             vars[var] = sub("-fcf-protection", "", vars[var])
+        if not clang_has_option("-fstack-clash-protection"):
+            vars[var] = sub("-fstack-clash-protection", "", vars[var])
 
 from distutils.core import setup, Extension