Fix link of libxul with LTO and the linker in xcode4. It is not clear if this

is working around a bug in ld or if the new linker has a reasonable reason
for wanting the string constant to be linker visible.

llvm-svn: 127594

clang/lib/CodeGen/CodeGenModule.cpp

@@ -1669,7 +1669,10 @@ CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) {
     // does make plain ascii ones writable.
     isConstant = true;
   } else {
-    Linkage = llvm::GlobalValue::PrivateLinkage;
+    // FIXME: With OS X ld 123.2 (xcode 4) and LTO we would get a linker error
+    // when using private linkage. It is not clear if this is a bug in ld
+    // or a reasonable new restriction.
+    Linkage = llvm::GlobalValue::InternalLinkage;
     isConstant = !Features.WritableStrings;
   }