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-rw-r--r--lib/Lex/PPMacroExpansion.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Lex/PPMacroExpansion.cpp b/lib/Lex/PPMacroExpansion.cpp
index e1fc0ba88f..71f332769e 100644
--- a/lib/Lex/PPMacroExpansion.cpp
+++ b/lib/Lex/PPMacroExpansion.cpp
@@ -530,6 +530,7 @@ static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) {
return llvm::StringSwitch<bool>(II->getName())
.Case("attribute_analyzer_noreturn", true)
+ .Case("attribute_availability", true)
.Case("attribute_cf_returns_not_retained", true)
.Case("attribute_cf_returns_retained", true)
.Case("attribute_deprecated_with_message", true)