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-rw-r--r--clang/lib/Frontend/InitPreprocessor.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index d9a2ef66b96..3c5be253c7f 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -253,7 +253,7 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
// These should all be defined in the preprocessor according to the
// current language configuration.
- if (!LangOpts.Microsoft)
+ if (!LangOpts.Microsoft && !LangOpts.TraditionalCPP)
Builder.defineMacro("__STDC__");
if (LangOpts.AsmPreprocessor)
Builder.defineMacro("__ASSEMBLER__");
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