[C/C++/Fortran] remove pedwarn0 and warning0 and fix PR 36901

[Manuel López-Ibáñez]

2008/8/4 Paolo Carlini <paolo.carlini@oracle.com>:
> Manuel López-Ibáñez wrote:
>>
>> So in order to fix a patch I had already I was forced to fix all this.
>>
>
> Many thanks Manuel! When the patch goes in I will be able to change back the
> implementation of is_function in libstdc++-v3 to use the better design using
> variadic_templates.

Could you test whether that works using my patch before commit? I
didn't have time to do as much testing as I would like, thus the
testcases added by the patch are quite simple.

Cheers,

Manuel.