Add -fobjc-default-synthesized-properties flag

to allow us to explicitly control whether or
not Objective-C properties are default synthesized.
Currently this feature only works when using
the -fobjc-non-fragile-abi2 flag (so there is
no functionality change), but we can now turn
off this feature without turning off all the features
coupled with -fobjc-non-fragile-abi2.

llvm-svn: 122519

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/Driver/ToolChains.h b/clang/lib/Driver/ToolChains.h
index 04288a2ee06..33b80534532 100644
--- a/clang/lib/Driver/ToolChains.h
+++ b/clang/lib/Driver/ToolChains.h
@@ -176,6 +176,12 @@ public:
             getTriple().getArch() == llvm::Triple::x86_64);
 #endif
   }
+  
+  virtual bool IsObjCDefaultSynthPropertiesDefault() const {
+    // Always allow default synthesized properties on Darwin.
+    return true;
+  }
+
   virtual bool IsObjCNonFragileABIDefault() const {
     // Non-fragile ABI is default for everything but i386.
     return getTriple().getArch() != llvm::Triple::x86;