Gentoo Archives: gentoo-amd64

From: "Hemmann
To: gentoo-amd64@l.g.o
Subject: Re: [gentoo-amd64] Re: Old topic comes round again: -Ox optimizations.
Date: Thu, 03 Nov 2005 17:42:49
Message-Id: 200511031841.16707.volker.armin.hemmann@tu-clausthal.de
In Reply to: [gentoo-amd64] Re: Old topic comes round again: -Ox optimizations. by Duncan <1i5t5.duncan@cox.net>
On Thursday 03 November 2005 16:27, Duncan wrote:
> Hemmann, Volker Armin posted > <200511031222.04016.volker.armin.hemmann@××××××××××××.de>, excerpted > > below, on Thu, 03 Nov 2005 12:22:03 +0100: > > Os is 'forbidden' for glibc, because there were some gcc bugs, that > > miscompiled glibc with Os. > > I've actually run an -Os compiled glibc here (hacked the ebuild to > remove the filterflags/replaceflags/stripflags calls) for some time, no > noticed issues (tho I haven't tried it with gcc-4.x yet). > > However, it's unsupported, and because glibc is linked by virtually > everything, I couldn't be sure whether problems I might have were due to > it or not. The thing that switched me back was attempting to trace down > why xorg had quite responding to CTRL-ALT-Fx VT-switch commands. I later > found out it was a known issue with that version on some configs, fixed in > a later version, but glibc is too big a compile (expecially when it's > compiled twice, once for 32-bit and once for 64-bit, up to four times for > those poor folks running nptl without nptl-only, just the two compiles > here, with a dual Opteron, is long, can't imagine four compiles on a > single CPU...
it is not so bad with a co and without ntplonly genlop -t glibc * sys-libs/glibc Sat Sep 24 07:51:46 2005 >>> sys-libs/glibc-2.3.5-r1 merge time: 1 hour, 14 minutes and 49 seconds. Tue Oct 4 23:12:51 2005 >>> sys-libs/glibc-2.3.5-r1 merge time: 1 hour, 18 minutes and 56 seconds. Fri Oct 7 04:43:40 2005 >>> sys-libs/glibc-2.3.5-r2 merge time: 1 hour, 53 minutes and 50 seconds. Fri Oct 28 05:52:35 2005 >>> sys-libs/glibc-2.3.5-r3 merge time: 1 hour, 36 minutes and 1 second. -- gentoo-amd64@g.o mailing list