Apple will use LLVM

[Roman Rakus]

On 02/16/2012 05:33 PM, Jakub Jelinek wrote:
> For just -O3 or -O2 -ftree-vectorize we could perhaps have some knob in
> the spec files to request those extra flags, for PGO it really requires
> some work from the packager (but e.g. bash/grep/awk, perhaps perl/python
> etc. would definitely improve, gcc itself is already built with PGO).

What kind of work? I have tried to build bash with added -O2 
-ftree-vectorize -fprofile-generate, but the build fails with many 
undefined reference to `__gcov_*.

You can see the build log in koji [1].

[1] http://koji.fedoraproject.org/koji/getfile?taskID=3809343&name=build.log

RR