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Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."
From: |
Richard Guenther |
Subject: |
Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..." |
Date: |
Fri, 29 Dec 2006 22:43:25 +0100 |
On 12/29/06, Paul Eggert <address@hidden> wrote:
Ian Lance Taylor <address@hidden> writes:
> Does anybody think that Paul's proposed patch to autoconf would be
> better than changing VRP?
I don't.
I haven't noticed anyone else addressing this question,
which I think is a good one.
I don't think doing any of both is a good idea. Authors of the affected
programs should adjust their makefiles instead - after all, the much more
often reported problems are with -fstrict-aliasing, and this one also doesn't
get any special treatment by autoconf. Even though -fno-strict-aliasing -fwrapv
would be a valid, more forgiving default. Also as ever, -O2 is what get's
the most testing, so you are going to more likely run into compiler bugs
with -fwrapv.
Richard.
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", (continued)
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Andreas Schwab, 2006/12/31
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Daniel Berlin, 2006/12/29
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Paul Eggert, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Andrew Pinski, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Paul Eggert, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Florian Weimer, 2006/12/29
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Richard B. Kreckel, 2006/12/29
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Richard Kenner, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Andreas Büning, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Paul Eggert, 2006/12/29
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...",
Richard Guenther <=
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Paul Eggert, 2006/12/29
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Bruce Korb, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Seongbae Park, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Paul Eggert, 2006/12/29
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Seongbae Park, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Bernd Schmidt, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Kaveh R. GHAZI, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Gabriel Dos Reis, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Kaveh R. GHAZI, 2006/12/30
- Re: changing "configure" to default to "gcc -g -O2 -fwrapv ...", Scott Robert Ladd, 2006/12/29