First wave of changes to support "blocks" (an extension to C).
This commit adds the declaration syntax (and associated type).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55417 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Basic/LangOptions.h b/include/clang/Basic/LangOptions.h
index def23e6..b1bdeba 100644
--- a/include/clang/Basic/LangOptions.h
+++ b/include/clang/Basic/LangOptions.h
@@ -48,6 +48,7 @@
 
   unsigned ThreadsafeStatics : 1; // Whether static initializers are protected
                                   // by lockis.
+  unsigned Blocks            : 1; // block extension to C
 private:
   unsigned GC : 2; // Objective-C Garbage Collection modes.  We declare
                    // this enum as unsigned because MSVC insists on making enums
@@ -66,6 +67,7 @@
     
     // FIXME: The default should be 1.
     ThreadsafeStatics = 0;
+    Blocks = 1;
   }
   
   GCMode getGCMode() const { return (GCMode) GC; }