[Cython] Cygwin: Handling missing C99 long double functions

[Greg Ewing]

Erik Bray wrote:
> A developer who writes some code that
> happens to use long double isn't going to think themselves "Gosh, I
> guess I can't accept `long double` here because it may cause Cython to
> generate code that contains "truncl"

Sounds to me like Cython shouldn't be taking it upon
itself to generate calls to truncl just because long
double is being used. The programmer should have to
call it explicitly if that's what they want.

-- 
Greg