From: walt <w41ter@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: [gentoo-user] Re: A tale of computing thud and blunder
Date: Mon, 19 Dec 2011 04:49:48 -0800 [thread overview]
Message-ID: <jcnbo3$vh3$1@dough.gmane.org> (raw)
In-Reply-To: <jcmmol$km0$1@dough.gmane.org>
On 12/18/2011 10:49 PM, Nikos Chantziaras wrote:
> Just like with any other optimization switch, there can be bugs. If
> Gentoo says it doesn't support graphite, then I'd stay away from it
> because Gentoo devs might not listen to your bug reports if you use
> it.
I've been using gcc with graphite support for about a year or so and
I've had zero problems so far. (I should also mention that I haven't
measured how much difference it makes, either.)
Very important to notice that *building* gcc with graphite support is
not at all the same as *using* graphite support while compiling.
To actually *use* your graphite support, you must include these CFLAGS
while compiling each package:
-floop-block -floop-strip-mine -floop-interchange
That implies that you can turn off graphite support by removing those
flags and recompiling your buggy package before filing a bug report.
(I did that only once and discovered that it didn't change the bug
at all.)
IIRC, gcc doesn't use those flags while compiling itself, but I could
be mistaken about that. I'll check again next time I compile gcc.
next prev parent reply other threads:[~2011-12-19 12:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-17 21:07 [gentoo-user] -march=native is *EXTREMELY* conservative Walter Dnes
2011-12-17 21:53 ` Dale
2011-12-17 21:58 ` [gentoo-user] " Nikos Chantziaras
2011-12-18 1:10 ` Walter Dnes
2011-12-18 10:34 ` Walter Dnes
2011-12-18 10:45 ` Nikos Chantziaras
2011-12-18 18:10 ` Andrea Conti
2011-12-19 0:05 ` [gentoo-user] A tale of computing thud and blunder Walter Dnes
2011-12-19 0:17 ` Dale
2011-12-19 5:41 ` Pandu Poluan
2011-12-19 6:15 ` Dale
2011-12-19 6:49 ` [gentoo-user] " Nikos Chantziaras
2011-12-19 7:21 ` Dale
2011-12-19 12:49 ` walt [this message]
2011-12-19 8:14 ` [gentoo-user] " Pandu Poluan
2011-12-19 16:37 ` Paul Hartman
2011-12-18 1:15 ` [gentoo-user] -march=native is *EXTREMELY* conservative Paul Hartman
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