On Thu, Oct 30, 2014 at 12:34:45PM +0000, Zamyatin, Igor wrote:
> >
> > On Thu, Oct 30, 2014 at 08:48:57AM +0000, Zamyatin, Igor wrote:
> > > Posted a patch in libc-alpha:
> > >
> > > https://sourceware.org/ml/libc-alpha/2014-10/msg00701.html
> >
> > That looks wrong. The non-PIC patterns that are enabled unconditionally
> > with the patch set/use ebx, which will not work with pre-GCC 5 in PIC mode.
>
> Could you please specify why do you think it is wrong for PIC mode for
> pre-GCC 5?
Those macros use "=&b" etc. in asm constraints, so IMHO you'll get the same
error as for say:
int
foo (void)
{
bar ();
int i = 0;
asm volatile ("" : "+b" (i));
bar ();
return i;
}
when compiled by gcc 4.9 and earlier with -O2 -m32 -fpic:
error: inconsistent operand constraints in an ‘asm’
Jakub
