[Cython] Cygwin: Handling missing C99 long double functions

[Robert Bradshaw]

On Fri, May 13, 2016 at 4:26 AM, Erik Bray <erik.m.bray at gmail.com> wrote:
> On Thu, May 12, 2016 at 12:55 AM, Greg Ewing
> <greg.ewing at canterbury.ac.nz> wrote:
>> 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.
>
> Since it's just a small optimization it could be disabled without
> trouble too.  Preferably with a #define that can be set or unset at
> compile time.

https://github.com/cython/cython/commit/46d3efc4ff9123c73889bcb54b2b200d6be39ff4