Apple will use LLVM

[Roman Rakus]

On 02/22/2012 09:08 AM, Jakub Jelinek wrote:
> On Wed, Feb 22, 2012 at 08:46:19AM +0100, Roman Rakus wrote:
>> 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_*.
> That would be probably because -lgcov isn't linked in.  When using
> -fprofile-generate, you need to pass that switch not just during
> compilation, but also when linking the binaries (or libraries) that contain
> -fprofile-generate compiled objects.
>
> 	Jakub
Thanks. Anyone who wants to try/test such built bash can use my builds 
which I copied to fedorapeople [1]. It was built using mock. Any 
comments, test results are welcome.

[1] http://rrakus.fedorapeople.org/bash-PGO/

RR