From 42c06998ea9dd5c58cb9d71f161a935b998c57e3 Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Tue, 12 Jan 2010 18:33:57 +0000
Subject: Define __weak attribute for objective-c pointers in win32 targets.
 Fixes radar 7530235. Daniel please review.

llvm-svn: 93246
---
 clang/lib/Basic/Targets.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'clang/lib/Basic/Targets.cpp')

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index ac13b950752..ef3cf89299e 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -994,6 +994,10 @@ public:
     DefineStd(Builder, "WIN32", Opts);
     DefineStd(Builder, "WINNT", Opts);
     Builder.defineMacro("_X86_");
+    if (Opts.ObjC1)
+      // __weak is always defined, for use in blocks and with objc pointers,
+      // even for i686-pc-win32 targets.
+      Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
   }
 };
 } // end anonymous namespace
-- 
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