[MacPorts] #62181: libgcc10 fails to build on Big Sur

[MacPorts]

#62181: libgcc10 fails to build on Big Sur
------------------------+----------------------
 Reporter:  jserio1869  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.6.4
 Keywords:  Big Sur     |       Port:  libgcc10
------------------------+----------------------
 Attempting to install gcc5, which has libgcc10 as a dependency. I get to
 this point in the main.log, where it issues a libgcc10 incompatible error.

 I listed this as a ticket because I did not see any specific libgcc10
 build error tickets, although I did see the general gcc build tickets.
 Thanks.


 :notice:fetch --->  Fetching distfiles for libgcc10
 :debug:fetch Executing proc-pre-org.macports.fetch-fetch-0
 :error:fetch gcc10 10.2.0 is not supported on Darwin 20 arm
 :error:fetch Failed to fetch libgcc10: incompatible OS X version
 :debug:fetch Error code: NONE
 :debug:fetch Backtrace: incompatible OS X version
 :debug:fetch     while executing
 :debug:fetch "$pre $targetname"
 :error:fetch See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc10/libgcc10/main.log
 for details.

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Ticket URL: <https://trac.macports.org/ticket/62181>
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