[MacPorts] #58442: gcc9 (and other gccN) fails to install on Mojave, Xcode-10.2.1

[MacPorts]

#58442: gcc9 (and other gccN) fails to install on Mojave, Xcode-10.2.1
-------------------------+--------------------
  Reporter:  mouse07410  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  gcc9        |
-------------------------+--------------------

Comment (by mouse07410):

 > ...there will always be wrinkles found...

 That's fine, or at least tolerable. For example, the current Xcode 10.2+
 lost the ability to authenticate to my Enterprise GitHub - how's that for
 a "wrinkle"? :-)

 Speaking of which, Xcode-10 change wasn't as bad as Xcode-10.2. And 10.2.1
 didn't seem to improve anything. :-(

 > ...This stuff gets pretty mind-bending...

 Which is why I don't think I looked at a compiler innards after circa
 2005. ;-)

-- 
Ticket URL: <https://trac.macports.org/ticket/58442#comment:23>
MacPorts <https://www.macports.org/>
Ports system for macOS