[MacPorts] #64316: gcc9 @9.4.0_1 & gcc10 @10.3.0_1: build failure: Undefined symbols for architecture x86_64

[MacPorts]

#64316: gcc9 @9.4.0_1 & gcc10 @10.3.0_1: build failure: Undefined symbols for
architecture x86_64
-------------------------+--------------------
  Reporter:  i0ntempest  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:
      Port:  gcc9 gcc10  |
-------------------------+--------------------

Comment (by i0ntempest):

 gcc10 can now be successfully built on macOS 12 after the latest change
 which introduced 2 new patch files, one adding macOS 12 support and one
 fixing this undefined symbols problem. gcc9, with these two patches (tho
 one of the patch needs to be modified to exclude config.gcc from being
 patched), can now also be built. The two patches are attached if anyone
 needs them but use gcc11 first if you can.

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Ticket URL: <https://trac.macports.org/ticket/64316#comment:14>
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