[v3] Possible fix for PR 5730

[Phil Edwards]

On Fri, Mar 21, 2003 at 12:06:12AM +0100, Gabriel Dos Reis wrote:
> Phil Edwards <phil@jaj.com> writes:
> [...]
> 
> | +// See std_complex.h for how this is used.
> | +#ifdef __FAST_MATH__
> | +# define _GLIBCPP_FAST_MATH 1
> | +#else
> | +# define _GLIBCPP_FAST_MATH 0
> | +#endif
> 
> This belongs to c++config.

Uh... that's where it is...