From owner-freebsd-amd64@FreeBSD.ORG  Tue Mar  8 06:41:58 2005
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Date: Tue, 8 Mar 2005 01:42:25 -0500
From: Damian Gerow <dgerow@afflictions.org>
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Subject: Re: Is -O2 supported for world?
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Thus spake David O'Brien (obrien@freebsd.org) [08/03/05 01:36]:
: It is suppored w/in /usr/src.

Thanks for the clarification.

: >     /usr/src/lib/libc/i386/sys/_amd64_get_fsbase.c: In function `_amd64_get_fsbase':
: >     /usr/src/lib/libc/i386/sys/_amd64_get_fsbase.c:40: warning: dereferencing type-punned pointer will break strict-aliasing rules
: > 
: > without -fno-strict-aliasing.  Not that I have any serious desire to run
: > with -O2, just curious.
: 
: -O2 isn't supported in /usr/ports without -fno-strict-aliasing also.
: There are a few ports that aren't happy being compiled with any form of
: -O2 (such as the old perl).

That error message was within /usr/src.