[MacPorts] #63677: libgcc11 11.2.0_1 fails to build on Monterey

[MacPorts]

#63677: libgcc11 11.2.0_1 fails to build on Monterey
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  Reporter:  jwhowarth  |      Owner:  Knapoc <Knapoc@…>
      Type:  defect     |     Status:  reopened
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.7.99
Resolution:             |   Keywords:
      Port:  libgcc11   |
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Comment (by JohnPritchard):

 I have successfully built libgcc11 (and gcc11) on macOS Monterey arm64 by
 applying the workaround patch gcc11_patch_macOS12_arm64 (that I have
 attached to this ticket) which I think addresses the symptoms, rather than
 curing the problem.

 The issues seem to revolve around libgcc_s.1.1.dylib.

 The first issue is that when "checking whether we are cross compiling" it
 is checks for libgcc_s.1.1.dylib only in /usr/lib and /usr/local/lib, so
 the first part of the patch is to create (and remove) a softlink
 /usr/local/lib/libgcc_s.1.1.dylib so that it will be found when needed.

 The 2nd issue is that once created, libgcc_s.1.1.dylib doesn't have
 executable permissions, like all the other dylibs created, so the 2nd part
 of the patch sets the permissions (on all the dylibs, just in case...)

 I don't understand why these problems present only for arm64 and not for
 x86_64 (probably because they are using different versions), I leave that
 for others to resolve.

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Ticket URL: <https://trac.macports.org/ticket/63677#comment:46>
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