[MacPorts] #65698: libgcc7 depends on later libgcc8, libgcc9, libgcc10

[MacPorts]

#65698: libgcc7 depends on later libgcc8, libgcc9, libgcc10
---------------------------+--------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.2
Resolution:                |   Keywords:
      Port:  libgcc7       |
---------------------------+--------------------

Comment (by barracuda156):

 Replying to [comment:1 ryandesign]:
 > It has always (for a decade at least?) been the case in MacPorts that
 all of the gcc ports have been modified to use the latest libgcc
 libraries. This allows software built with one gcc version to work
 seamlessly with software built with a different gcc version. However, if
 the latest libgcc now cannot build on some OS versions, that's a problem.

 Hmm, I see. I do not want to try this on Rosetta now (build several
 versions of libgcc is just too much), but I will try on Leopard somewhat
 later.
 We know for sure that `gcc7` and `gcc10`+ do build and work. What is not
 known is whether those in between do build now as well.

-- 
Ticket URL: <https://trac.macports.org/ticket/65698#comment:2>
MacPorts <https://www.macports.org/>
Ports system for macOS