------- Comment #9 from manu at gcc dot gnu dot org 2007-01-27 01:02 -------
(In reply to comment #8)
> Subject: Re: -Wno-deprecated needed also for C
>
> > manu at gcc dot gnu dot org wrote:
> > > ------- Comment #4 from manu at gcc dot gnu dot org 2007-01-23 00:01
> > > -------
> > > The testcase given is not valid any more. Could you think in any other
> > > testcase?
> > >
> > > In stmt.c (expand_asm_operands) there is:
> > >
> > > warning (0, "use of memory input without lvalue in "
> > > "asm operand %d is deprecated", i + noutputs);
> > >
> > >
> >
> > Hang on, hang on...
> >
> > WTF?! Using an rvalue in an assembly input that may contain "m" is
> > something that is highly useful, and it will break metric tons of code.
> > -Wno-deprecated or no -Wno-deprecated, deprecating this particular
> > construct is a major mistake.
>
> This has been true since 3.3.3 and in fact, this was made an error in 4.0.0,
> even though the warning remains.
Huh? What is that suppose to mean?
> So:
> float f(float a)
> {
> asm(""::"mo"((double)a));
> return a;
> }
>
> Fails
But it doesn't produce that warning. Is that warning dead code or what?
Still, going back to this PR, is there anything deprecated in C front-end worth
of implementing -Wno-deprecated for C?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11051
