Date: Mon, 27 May 2013 21:38:01 +0200 From: Dimitry Andric <dim@FreeBSD.org> To: Rui Paulo <rpaulo@felyko.com> Cc: amd64@FreeBSD.org, toolchain@FreeBSD.org, Pedro Giffuni <pfg@freebsd.org> Subject: Re: [CFT] gcc: support for barcelona Message-ID: <4BD4D414-8281-4127-A520-565CF28FF5E5@FreeBSD.org> In-Reply-To: <E9DC99EF-F2E9-4A5F-8370-36DA25DE2C89@felyko.com> References: <51A38CBD.6000702@FreeBSD.org> <E9DC99EF-F2E9-4A5F-8370-36DA25DE2C89@felyko.com>
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On May 27, 2013, at 21:12, Rui Paulo <rpaulo@felyko.com> wrote: > On 27 May 2013, at 09:41, Pedro Giffuni <pfg@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. >>=20 >> Unfortunately I had to revert rapidly such support as it broke = building >> some C++ ports even when it was not being used. >>=20 >> jkim@ did some cleanup of the support and the patch has been >> gathering rust here: >>=20 >> http://people.freebsd.org/~jkim/reworked-r236962-3.diff >>=20 >> 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. >>=20 >> 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. >=20 > 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
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