On 05/19/2011 06:16 PM, Joseph S. Myers wrote:
> I'd think the right approach is simply to see if the compiler accepts a 
> trivial source file of the form
> 
> _Complex float cf;
> _Complex double cd;
> _Complex long double cld;
> 
> and if it does, then presume complex support is present.

Joseph,
This is a good idea.  Done this in new patch.

-- 
Yao (齐尧)