[MacPorts] #66024: libgcc10 does not seem to install libgcc_ext.10.x dylibs, leaves gcc7 broken

[MacPorts]

#66024: libgcc10 does not seem to install libgcc_ext.10.x dylibs, leaves gcc7
broken
---------------------------+----------------------
  Reporter:  barracuda156  |      Owner:  kencu
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.2
Resolution:                |   Keywords:
      Port:  libgcc10      |
---------------------------+----------------------

Comment (by kencu):

 Likewise, clang 6, 8, 10, and probably 12 and 13 are ripe for deletion as
 well.

 I think clang 5, 7, 9, and 11 are still useful. 9 is a bit questionable.
 We have to see what bootstrapping looks like with clang11-bootstrap to see
 just what ones are ripe for deleting.

 I can hear the uproar - "Oh NO, we can never do that!" -- but in fact we
 can, and we should, and Jeremy deleted obsolete clang/llvm versions all
 the time.

-- 
Ticket URL: <https://trac.macports.org/ticket/66024#comment:5>
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