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Subject[PATCH v2 18/18] perf clang: Define PERF_BUILTIN_CLANG for builtin clang compiling
Date
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(+)

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());
--
1.8.3.4
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