cxx11 portgroup: C++11, C++14, C++17

[Ryan Schmidt]

On Feb 4, 2018, at 20:21, Eitan Adler wrote:

> On 4 February 2018 at 16:09, Ken Cunningham wrote:
>> Please not more portgroups, tho.
> 
> Why not?

They would be rather similar to one another.

https://en.wikipedia.org/wiki/Don%27t_repeat_yourself

We should think about how this will work if and when it is integrated into MacPorts base and not a portgroup. I think starting with configure.cc_std and configure.cxx_std might work well.

>> How about we just move up that clang floor as time goes by?
> 
> I'd actually be in favor of more explicit dependency usage. Either
> creating a new portgroup or a single generic one called
> compiler_features or whatnot.