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-rw-r--r--clang/lib/Frontend/InitPreprocessor.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 6eafe81e826..95d9f62c608 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -541,8 +541,10 @@ static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
Builder.defineMacro("__cpp_template_template_args", "201611L");
// C++20 features.
- if (LangOpts.CPlusPlus2a)
+ if (LangOpts.CPlusPlus2a) {
Builder.defineMacro("__cpp_conditional_explicit", "201806L");
+ Builder.defineMacro("__cpp_constinit", "201907L");
+ }
if (LangOpts.Char8)
Builder.defineMacro("__cpp_char8_t", "201811L");
Builder.defineMacro("__cpp_impl_destroying_delete", "201806L");
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