Re: Strange behaviour gcc 3.0

[Igmar Palsenberg <i dot palsenberg at jdimedia dot nl>]

On 1 Aug 2001, Alexandre Oliva wrote:

> On Aug  1, 2001, Igmar Palsenberg <i.palsenberg@jdimedia.nl> wrote:
>
> >         printf("bogus"
> > #ifdef TEST
> >         "testing"
> > #endif
> >         );
>
> > [root@wrkst SPECS]# gcc -O2 -o x x.c
> > x.c:7:1: directives may not be used inside a macro argument
> > x.c:7:1: unterminated argument list invoking macro "printf"
> > x.c: In function `main':
> > x.c:10: parse error before ')' token
>
> > Code didn't change. This really strikes me.. Anyone can comment on this ??
>
> printf is a macro (don't ask me why; it's a glibc implementation
> detail that is authorized by the C Standard), and there can't be
> preprocessor directives inside a macro argument list.

It's indeed in bits/stdio.h.

Is there a define available to see if I'm using gcc 3.0 ?? Older versions
have no problem with above code, and the #ifdef in printf() is massively
used in the programs I'm recompiling.

I can override the optimize to use -O0, but that might give other
problems..

For now, I'll hack glibc.



	Regards,

		Igmar

-- 

Igmar Palsenberg
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