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To: gentoo-dev@g.o
From: "Robin H. Johnson" <robbat2@g.o>
Subject: Re: Re: [RFC] CFLAGS paragraph for the GWN
Date: Sat, 30 Sep 2006 17:38:59 -0700
On Sat, Sep 30, 2006 at 04:37:05PM -0600, Ryan Hill wrote:
> I thought he wanted flags that broke upgrading between GCC 3.4 and 4.1.
>  tree-loop-linear wasn't in 3.4.  If you want flags that just break
> stuff with 4.1 you can include -ftree-vectorize.
Thanks.

> > The objective here was mainly to point out some things that users are
> > doing that are causing breakages, leading to bugs that are ultimately
> > marked INVALID after much tracing.
> Like using CFLAGS not on the Safe CFLAGS page?  ;)
Not really.
One needs to use some common sense as a developer in evaluating user
CFLAGS - because there are plenty of flags that are safe, but aren't
listed on that page.

Several years ago, I wrote a package that was the forerunner of the
'Safe CFLAGS' page - genflags. It was close to unmaintable at the time
however, so it's suffered a lot of bit-rot. With the advent of
libcpuinfo, and x86info being written, it stands a much better chance of
giving useful output, but that still does not supersede the common sense
statement above.

-- 
Robin Hugh Johnson
E-Mail     : robbat2@g.o
GnuPG FP   : 11AC BA4F 4778 E3F6 E4ED  F38E B27B 944E 3488 4E85
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References:
[RFC] CFLAGS paragraph for the GWN
-- Lionel Bouton
Re: [RFC] CFLAGS paragraph for the GWN
-- Ryan Hill
Re: Re: [RFC] CFLAGS paragraph for the GWN
-- Robin H. Johnson
Re: [RFC] CFLAGS paragraph for the GWN
-- Ryan Hill
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