[MacPorts] #57751: qt4-mac: lots of errors trying to build with clang-7.0 (presumably related to defaulting to c++17 mode)

[MacPorts]

#57751: qt4-mac: lots of errors trying to build with clang-7.0 (presumably related
to defaulting to c++17 mode)
----------------------+-----------------------
  Reporter:  kencu    |      Owner:  michaelld
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  qt4-mac  |
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Comment (by kencu):

 btw marcus, the fix for that was to get rid of the spaces: `{macports-
 clang-[6-9].0}`, and now qt4-mac asks for `clang-5.0`. I am pretty sure
 `clang-6.0` is OK to build it too, but haven't tried. `clang-7.0` and
 above, likely not.

 I tried a build with all of the patches, but still failed. Haven't dug
 back in more. Like Michael says, it's probably about time one of us busted
 `qt4-mac` into our own github repo somewhere and started adding the
 patches that way, as it's getting very unwieldy in the Portfile /
 patchfile sense.

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Ticket URL: <https://trac.macports.org/ticket/57751#comment:14>
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