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From: Mike Frysinger <vapier@gentoo.org>
Date: Sun, 3 Apr 2011 10:04:47 -0400
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Subject: Re: [gentoo-dev] Re: GCC 4.6.0
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On Sun, Apr 3, 2011 at 6:19 AM, Ryan Hill wrote:
> On Sun, 3 Apr 2011 05:50:32 Duncan wrote:
>> Ryan Hill posted on Sat, 02 Apr 2011 22:11:12 -0600 as excerpted:
>>>=A0You may also want to test your packages with the new -Ofast option to
>>>=A0be sure it doesn't have any hardcoded assumptions about -O flags.
>>
>> The release description I've read for -Ofast says it includes -fast-math=
,
>> among other things, a flag Gentoo has always strongly discouraged (you
>> break with it, you keep the pieces) and which can get bugs resolved/
>> invalid as a result.
>>
>> Now that gcc 4.6 itself is more strongly supporting it as enabled with o=
ne
>> of the -O options, is that policy going to change, or is Gentoo going to
>> officially not support -Ofast, as well?
>
> I doubt we will. =A0If a package breaks because of -Ofast there's really
> nothing we can do about it. =A0It's not a bug in the compiler or the pack=
age,
> it's that you explicitly told it to generate non-standard-conformant code=
.
obviously we will look at ICEs and such, but in terms of apps
misbehaving at runtime, most likely we'll write it up as not a bug
like Ryan says
-mike