standard way to require c++11?

[Ryan Schmidt]

On Apr 29, 2015, at 1:37 AM, Ryan Schmidt wrote:

> On Apr 29, 2015, at 12:12 AM, Mihai Moldovan wrote:
> 
>> Do we want a general "cxx" PortGroup with options for C++11, C++14,
>> C++... or a new PortGroup for every standard? Probably the former?
> 
> That was going to be my suggestion, to avoid a proliferation of portgroups that all do something similar.

For example, right now I'm dealing with the fact that gpsd 3.14 requires C11 (not C++11), and would like to be able to indicate that so that pre-C11 compilers get blacklisted.