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Re: Large-Address awareness on 64 bit systems
On Sun, 2011-06-19 at 10:18 +0200, Corinna Vinschen wrote:
> On Jun 19 10:09, Corinna Vinschen wrote:
> > On Jun 19 02:24, Yaakov (Cygwin/X) wrote:
> > > Are there any downsides to large address awareness, particularly for
> > > 32bit systems or those with less than 4GB? IOW is there any reason not
> > > to switch this on by default in gcc/ld?
> >
> > I don't see any problem. Cygwin does not use the high bit of a pointer
> > as a flag for something and hopefully no other DLL or applications does
> > that.
>
> Well, there's of course still a chance that an application or the Cygwin
> DLL itself uses signed ints or longs to compare addresses or to do
> adress arithmetic. I hope there's no such problem lurking in a dark and
> musty corner of the sources...
That would only be triggered when rebasing to the upper addresses,
right? My question was simply about adding
%{!shared:--large-address-aware}
to gcc's link specs.
Yaakov