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[v2,18/18] perf clang: Define PERF_BUILTIN_CLANG for builtin clang compiling

Message ID 1474874832-134786-19-git-send-email-wangnan0@huawei.com
State New
Headers show

Commit Message

Wang Nan Sept. 26, 2016, 7:27 a.m. UTC 
By this macro BPF script knows what compiler it is being built with.
Scripts prefer external clang can force fall back to it by:

 #ifdef PERF_BUILTIN_CLANG
 # error I prefer external clang compiler
 #endif

Signed-off-by: Wang Nan <wangnan0@huawei.com>

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/util/c++/clang.cpp | 1 +
 1 file changed, 1 insertion(+)

-- 
1.8.3.4
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Patch

diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
index a2de788..dd32f5d 100644
--- a/tools/perf/util/c++/clang.cpp
+++ b/tools/perf/util/c++/clang.cpp
@@ -62,6 +62,7 @@  createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
 		"-vectorize-slp",
 		"-Wno-unused-value",
 		"-Wno-pointer-sign",
+		"-DPERF_BUILTIN_CLANG=1"
 		"-x", "c"};
 
 	CCArgs.append(CFlags.begin(), CFlags.end());