From 3dbeb55874f6424a81400da1b5ac34eff2c0a43a Mon Sep 17 00:00:00 2001
From: Argyrios Kyrtzidis <akyrtzi@gmail.com>
Date: Wed, 29 Feb 2012 03:43:52 +0000
Subject: [driver] Emit an error when trying to use ARC on macosx earlier than
 10.6

rdar://10459258

llvm-svn: 151706
---
 clang/lib/Driver/Tools.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'clang/lib/Driver/Tools.cpp')

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 14fb9cb7188..c5caaf024f7 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -2225,6 +2225,9 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   // NOTE: This logic is duplicated in ToolChains.cpp.
   bool ARC = isObjCAutoRefCount(Args);
   if (ARC) {
+    if (!getToolChain().SupportsObjCARC())
+      D.Diag(diag::err_arc_unsupported);
+
     CmdArgs.push_back("-fobjc-arc");
 
     // FIXME: It seems like this entire block, and several around it should be
-- 
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