[MacPorts] #46797: whizard @2.2.3_0: update to 2.2.4, default to `+gcc49` variant, add `+gcc5` variant

[MacPorts]

#46797: whizard @2.2.3_0: update to 2.2.4, default to `+gcc49` variant, add `+gcc5`
variant
-------------------------------+---------------------------------
  Reporter:  juergen.reuter@…  |      Owner:  macports-tickets@…
      Type:  update            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:  haspatch maintainer
      Port:  whizard           |
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Comment (by ryandesign@…):

 With gcc 5, the version numbering scheme has changed. Whereas we had gcc
 4.7, 4.8, 4.9, we will in the future have gcc 5, 6, 7, etc.

 So the description for the gcc5 variant should mention gcc 5 (not gcc
 5.0), and the `configure.compiler` directive should specify `macports-
 gcc-5` (not `macports-gcc-5.0`).

 The section that sets the `default_variants` to `+gcc49` should be updated
 to not do so if the gcc5 variant has already been selected.

-- 
Ticket URL: <https://trac.macports.org/ticket/46797#comment:5>
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