[MacPorts] #54149: gcc6 fails to compile because "configure: error: cannot compute sizeof (long long)"

[Ryan Schmidt]

> On May 18, 2017, at 18:55, René J.V. Bertin <rjvbertin at gmail.com> wrote:
> 
> On Thursday May 11 2017 07:38:01 Ryan Schmidt wrote:
> 
>> It's a matter of doing the equivalent of this, with updated versions:
>> 
>> https://github.com/macports/macports-ports/commit/c4ddd1af302d5be105cbd58d2cb5dce89e892858
>> 
>> I will work on it later.
> 
> I hope you don't mind a helping hand :) if everything checks out I should be submitting a patch for the upgrade tomorrow.
> 
> Annoyingly libgfortran has apparently had an API change, its sonumber is increased.

Yes. Therefore, we need to add a libgcc6 subport, much like the existing libgcc45 subport.