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Date: Tue, 12 Oct 2010 18:41:44 +0400 (MSD)
From: malc <av1474@comtv.ru>
Subject: Re: [Qemu-devel] [PATCH 08/39] provide portable sizeof(long) test
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To: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-devel@nongnu.org

On Tue, 12 Oct 2010, Paolo Bonzini wrote:

> On 10/12/2010 04:38 PM, malc wrote:
> > On Tue, 12 Oct 2010, Paolo Bonzini wrote:
> > 
> > > On 10/12/2010 03:47 PM, malc wrote:
> > > > >    # host long bits test
> > > > > -hostlongbits="32"
> > > > > -case "$cpu" in
> > > > > -  x86_64|alpha|ia64|sparc64|ppc64|s390x)
> > > > > -    hostlongbits=64
> > > > > -  ;;
> > > > > -esac
> > > > > +cat>   $TMPC<<   EOF
> > > > > +int sizeof_long_is_8[sizeof(long) == 8 ? 1 : -1];
> > > > > +EOF
> > > > > +if compile_object; then
> > > > > +hostlongbits=64
> > > > > +else
> > > > > +hostlongbits=32
> > > > > +fi
> > > > 
> > > > This is wrong.
> > > 
> > > Care to expand?
> > 
> > Gives wrong results on Win64.
> 
> Then it's not HOST_LONG_BITS, it's HOST_POINTER_BITS.

Not quite, [s]size_t/ptrdiff_t are 64 bits wide udner Win64, little
to do with pointers.

> 
> Paolo
> 

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