Building without ARC

Clang's ARC(Automatic Reference Counting) support is completely
useless to me, since I don't use Objective-C.

So I made a patch to build without ARC (which turned out to be quite
simple.) If you are in the same situation you could use it to save some
disk space and build time.

http://sparcs.kaist.ac.kr/~tinuviel/devel/llvm/no-arc

Not sure how to turn that to proper build option. Hope it helps though.

Ah, you're talking about the ARC migrator. FWIW, we plan to move the ARC migrator out of the main Clang and turn it into a separate plugin, which will save most people a bunch of build time. I don't know when it'll actually happen, though.

  - Doug

We plan on making the ARC migrator a plugin within the next couple months.

Thanks!