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DragonFly users List (threaded) for 2006-10
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Re: Where to place compiler flags for world?

From: YONETANI Tomokazu <qhwt+dfly@xxxxxxxxxx>
Date: Wed, 18 Oct 2006 18:10:37 +0900

On Wed, Oct 18, 2006 at 08:41:14AM +0000, Oliver Fromme wrote:
> Simon 'corecode' Schubert wrote:
>  > Thomas Schlesinger wrote:
>  > > options CPU_ENABLE_EST
>  > > CONF_FLAGS=-march-pentium-m -O2 -fomit-frame-pointer -pipe
>  > 
>  > don't use -O2 nor -fomit-frame-pointer
> Hm.  I assumed that -O2 -fno-strict-aliasing was safe to
> use with the newer gcc that DragonFly has (as opposed to
> the old 2.9.x one of FreeBSD 4).  Am I wrong?  (It has
> been FreeBSD's default on 5.x and 6.x for ages.)

IIRC, a bug in code generation of stack smash protector with -O2 or higher
hasn't been addressed in our default compiler, and SSP is on by default,
so you have the chance(though not big) to trigger the bug:

BTW, are we going to keep two gcc-4's in our source tree, in addition to
the default? :)


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