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Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."
From: |
Paul Eggert |
Subject: |
Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..." |
Date: |
Wed, 17 Jan 2007 00:24:52 -0800 |
User-agent: |
Gnus/5.1008 (Gnus v5.10.8) Emacs/21.4 (gnu/linux) |
Thorsten Glaser <address@hidden> writes:
> Paul Eggert dixit:
>
>> […] gcc -O2 makes no promises without
>> -fwrapv.
>
> gcc -O1 -fwrapv even doesn't work correctly for gcc3,
> and gcc2 and gcc <3.3(?) don't even have -fwrapv:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30477
The latter would not be a problem, since Autoconf would try -fwrapv on
a test module before using it to compile a real module.
Do you have a test case illustrating the gcc3 bug? If so,
perhaps Autoconf could include that in its test of -fwrapv.
Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Diego Novillo, 2007/01/02
Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Laurent GUERBY, 2007/01/03
Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Thorsten Glaser, 2007/01/16
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...",
Paul Eggert <=