Re: [patch 02/2] allow gcc4 to optimize unit-at-a-time

[Sam Ravnborg <sam@ravnborg.org>]

On Wed, Dec 28, 2005 at 01:47:04PM +0100, Sam Ravnborg wrote:
> On Wed, Dec 28, 2005 at 08:04:35AM -0500, Jakub Jelinek wrote:
> > No.
> > -fno-unit-at-a-time should be used with GCCs that
> > a) support it
> > b) are older than GCC 4.0
> > 
> > The "$(GCC_VERSION) -lt 0400" test cares of b),
> > $(call cc-option,-fno-unit-at-a-time) cares of a).
> 
> There was a reason for disabling it unconditionally in first place.
> That was due to unexpected huge stack usage if I understand correct.
> Ingo's patch enebles unit-at-a-time only for gcc > 4.00 which should
> have this issue fixed.
> 
> If the argument is that we suddenly shall enable unit-at-a-time for
> gcc before 4.00 then we should visit the reasons why it originally was
> disabled.
Hi Jakub.

Reading your mail once more I understood it.
And you are right of course.

	Sam - on his way to get more coffee...