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Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."
- From: Thorsten Glaser <tg at mirbsd dot de>
- To: Paul Eggert <eggert at CS dot UCLA dot EDU>
- Cc: autoconf-patches at gnu dot org, bug-gnulib at gnu dot org, gcc at gcc dot gnu dot org
- Date: Tue, 16 Jan 2007 18:28:21 +0000 (UTC)
- Subject: Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."
- References: <200612300047.kBU0lFwk014817@localhost.localdomain> <87bqlmkui3.fsf@penguin.cs.ucla.edu> <10612300508.AA08474@vlsi1.ultra.nyu.edu> <87psa1izpc.fsf@penguin.cs.ucla.edu> <45963E6D.5070203@t-online.de> <10612301301.AA14129@vlsi1.ultra.nyu.edu> <871wmht4ab.fsf@penguin.cs.ucla.edu>
Paul Eggert dixit:
> [â] 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
bye,
//mirabile
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