[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 barracuda156):

 Replying to [comment:2 kencu]:
 > what system are you on here?

 I was going through this hell of libgccs more than once: on 10.6.8, 10.6,
 10.5.8. (Obviously, I set them to default to libgcc11 or libgcc12 – and
 yes, everywhere setting is changed accordingly.)

 Apparently `libgcc9` finally installed two missing dylibs. I still fail to
 understand why are we required to build every libgccX, when some of them
 install absolutely nothing. Like, seriously, for what?

-- 
Ticket URL: <https://trac.macports.org/ticket/66024#comment:3>
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