specific targets default them to on. Default blocks to on on 10.6 and later.
Add a -fblocks option that allows the user to override the target's default.
Use -fblocks in the various testcases that use blocks.
llvm-svn: 60563
- readonly and readwrite are mutually exclusive.
- assign, copy, and retain are mutually exclusive.
- copy and retain are invalid on non-object types.
- Warn about using default 'assign' property on object types
(attempting to follow gcc behavior).
llvm-svn: 56507
Daniel Dunbar