[CFT] gcc: support for barcelona

[Dimitry Andric]

On May 27, 2013, at 21:12, Rui Paulo <rpaulo at felyko.com> wrote:
> On 27 May 2013, at 09:41, Pedro Giffuni <pfg at freebsd.org> wrote:
>> Almost a year ago I tried to bring in the support for AMD's barcelona
>> chipset into our gcc. This actually filled a lot of holes in that were left
>> when similar intel support was brought in.
>> 
>> Unfortunately I had to revert rapidly such support as it broke building
>> some C++ ports even when it was not being used.
>> 
>> jkim@ did some cleanup of the support and the patch has been
>> gathering rust here:
>> 
>> http://people.freebsd.org/~jkim/reworked-r236962-3.diff
>> 
>> The patch still applies cleanly and there is a good chance it will work
>> since there have been other fixes merged since the last time.
>> 
>> I did some basic testing and so far it works for me but I don't have
>> the specific chipset. Additional testing would be welcome.
> 
> I have to question the general direction of this work. We switched to Clang as the default compiler for i386/amd64 some months ago and now you're working on improving our base GCC especially for amd64? I don't really understand how useful this is. It doesn't strike me as a good idea to see people working on things that will eventually be replaced / removed.

It is probably a better use of time to work on getting the tree to build
with an out-of-tree gcc 4.7 or 4.8 instead.  Why spend more effort on a
completely dead branch of gcc?  Newer gcc's have better code generation,
support for more modern CPUs, and better diagnostics (including even
those controversial carets ;-).

That said, if it is a particular itch somebody wants to scratch, I see
no reason not to, as long as it doesn't break anything else...

-Dimitry