[MacPorts] #69875: libgcc7 build failed (MacOS Big Sur)

[MacPorts]

#69875: libgcc7 build failed (MacOS Big Sur)
--------------------------------+---------------------
 Reporter:  clegra              |      Owner:  (none)
     Type:  defect              |     Status:  new
 Priority:  Normal              |  Milestone:
Component:  ports               |    Version:  2.9.3
 Keywords:  libgcc7 build fail  |       Port:  libgcc7
--------------------------------+---------------------
 under MacOS 11.7.10, libgcc7 repeatedly fails to build
 while a prompt sometimes says that "libgcc7 is known to fail" and asks
 whether I want to build it, it is used/referred to for the installation of
 subversion which I need

 --->  Building libgcc7
 Error: Failed to build libgcc7: command execution failed
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc7/libgcc7/main.log
 for details.
 Error: Problem while installing libgcc7
 Error: rev-upgrade failed: Error rebuilding gcc7

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Ticket URL: <https://trac.macports.org/ticket/69875>
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