[MacPorts] #44193: qt: allow side by side installation of qt4-mac and qt5-mac

[MacPorts]

#44193: qt: allow side by side installation of qt4-mac and qt5-mac
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  Reporter:  mojca@…           |      Owner:  mcalhoun@…
      Type:  enhancement       |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:
      Port:  qt4-mac, qt5-mac  |
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Comment (by michaelld@…):

 Let me be brief: I don't have time to keep up with the ongoing banter
 here. I'm sure there's lots of great discussion in them, but the best I
 can do is scan them. I -strongly- encourage replies to be reasonably brief
 and concise. A reasonable paragraph like mine below is about what I can
 digest (~250 words). qt4-mac is openmaintainer, so if someone else wants
 to mess with it please go ahead! If you do, please make BIG changes not
 very often; as Mojca says: it takes forever to build Qt4 on some systems.

 Yes, sometimes it takes a small, stupid thing like total breakage in a new
 OS to get my attention; I'm a very busy person! I'm going to commit
 -something- tomorrow/Monday that will install qt4 to allow a parallel
 build. What I commit will be just the minimum necessary, whatever that is.
 If we decide to rename "qt4-mac" to just "qt4", that's fine with me & can
 be done at the same time. If not, that's also fine. I fully agree (and
 have stated) that René has worked hard & some of his changes will get put
 in place, some day; maybe by me, maybe by someone else. Maybe we can get a
 GSoC'16 student to do it & the other accumulating Qt tickets. I think the
 scenario this coming week will be as Mojca describes: there are just too
 many ports to check, so let's do the change and then clean up as necessary
 afterward. My commit will rev-bump around 25 ports that I know work with
 any Qt4 install location. There are another about 50 ports that either
 fail (~4 of them) or I haven't been able to test (~46 of them). Let's hope
 many of the latter of these use the qt4 portgroup & "just work". Either
 way, the time has come and this is the way it's going to happen (otherwise
 it won't happen & I think we wall don't want that).

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Ticket URL: <https://trac.macports.org/ticket/44193#comment:66>
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