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Add __has_feature support to detect if clang supports the explicit "atomic" keyword for ObjC properties. 

Fixes <rdar://problem/12953378>.

llvm-svn: 171504
This commit is contained in:
Ted Kremenek 2013-01-04 19:04:44 +00:00
parent 8533dd9f58
commit dae8f9f1a2
1 changed files with 1 additions and 0 deletions
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clang/lib/Lex/PPMacroExpansion.cpp
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@ -818,6 +818,7 @@ static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) {
.Case("objc_instancetype", LangOpts.ObjC2)
.Case("objc_modules", LangOpts.ObjC2 && LangOpts.Modules)
.Case("objc_nonfragile_abi", LangOpts.ObjCRuntime.isNonFragile())
.Case("objc_property_explicit_atomic", true) // Does clang support explicit "atomic" keyword?
.Case("objc_weak_class", LangOpts.ObjCRuntime.hasWeakClassImport())
.Case("ownership_holds", true)
.Case("ownership_returns", true)