Change the driver's logic about Objective-C runtimes: abstract out a

structure to hold inferred information, then propagate each invididual
bit down to -cc1.  Separate the bits of "supports weak" and "has a native
ARC runtime";  make the latter a CodeGenOption.

The tool chain is still driving this decision, because it's the place that
has the required deployment target information on Darwin, but at least it's
better-factored now.

llvm-svn: 134453

1 files changed, 3 insertions, 1 deletions

diff --git a/clang/lib/Driver/ToolChains.h b/clang/lib/Driver/ToolChains.h
index 9ed0dc2ef8e..d68016b3a24 100644
--- a/clang/lib/Driver/ToolChains.h
+++ b/clang/lib/Driver/ToolChains.h
@@ -80,6 +80,8 @@ private:
   /// initialized.
   std::string MacosxVersionMin;
 
+  bool hasARCRuntime() const;
+
 private:
   void AddDeploymentTarget(DerivedArgList &Args) const;
 
@@ -184,7 +186,7 @@ public:
 
   virtual bool HasNativeLLVMSupport() const;
 
-  virtual bool HasARCRuntime() const;
+  virtual void configureObjCRuntime(ObjCRuntime &runtime) const;
 
   virtual DerivedArgList *TranslateArgs(const DerivedArgList &Args,
                                         const char *BoundArch) const;