[MacPorts] #48857: gcc ports: support compiling multiple archs (universal)

[MacPorts]

#48857: gcc ports: support compiling multiple archs (universal)
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  Reporter:  devernay                            |      Owner:  macports-
                                                 |  tickets@…
      Type:  enhancement                         |     Status:  assigned
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:
      Port:  gcc43 gcc44 gcc45 gcc46 gcc47       |
  gcc48 gcc49 gcc5 gcc6                          |
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Comment (by mojca):

 The idea is to make the need to use `muniversal` obsolete, it's not clear
 to me how `muniversal` itself could help in any way (it's just a smart way
 to circumvent gcc's limitation). My current understanding is that someone
 needs to write a full patch implementing support for fat binaries and
 submit it upstream to `gcc` developers and wait until they accept it.
 Based on your post I assumed this has already been done for `gcc6`, but it
 doesn't seem so.

 It's definitely possible to do it. It's just a matter of someone doing it
 and someone convincing upstream that this is a super cool feature that
 everyone desperately needs.

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Ticket URL: <https://trac.macports.org/ticket/48857#comment:12>
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