[MacPorts] #47553: compilers portgroup: add option for gcc5

[MacPorts]

#47553: compilers portgroup: add option for gcc5
---------------------------+--------------------
  Reporter:  ryandesign@…  |      Owner:  sean@…
      Type:  enhancement   |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:  fixed         |   Keywords:
      Port:  compilers     |
---------------------------+--------------------

Comment (by mmoll@…):

 You probably need to make corresponding changes in the openmpi-* ports.
 For example, `port install arrack +gcc5 +openmpi` won't work currently.
 Should I file a separate ticket for that?

-- 
Ticket URL: <https://trac.macports.org/ticket/47553#comment:11>
MacPorts <https://www.macports.org/>
Ports system for OS X