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Re: Fortran flags
From: |
Thomas Weber |
Subject: |
Re: Fortran flags |
Date: |
Tue, 10 May 2011 21:44:11 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Tue, May 10, 2011 at 11:20:45AM -0500, Jordi Gutiérrez Hermoso wrote:
> On 10 May 2011 10:12, Daniel Kraft <address@hidden> wrote:
>
> > Usually, -O2 should be a good thing for gfortran. And in general, please
> > report any "problems" -O2 causes as gfortran bug.
>
> I was wondering why it's not enabled in the default Fortran flags.
> Instead we merely use -O. I thought the option enabled other
> optimisation flags that caused problems. Red Hat for example broke ABI
> compatibility by compiling with -O2:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=478856
Maybe I don't get it, but I don't see anything in that bug report that
even says someting about optimization flags?
Thomas