Error: Failed to build gcc47: on 10.12.6 with Xcode 9.0.1: error: non-local symbol required in directive

[nbolyard]

After hours of building, the command "sudo port install gcc47 +universal" failed with the error message "Error: Failed to build gcc47: command execution failed". The file /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc47/gcc47/main.log is attached.

Story: my MacOS was updated to Sierra 10.12.6. I completely wiped out the old MacPorts by following the instructions in ​https://guide.macports.org/chunked/installing.macports.uninstalling.html including the rm -rf step. Then I installed MacPorts-252-10.12-Sierra.pkg. Then as the first command, I tried "sudo port install gcc47 +universal". It built for HOURS, then it stopped with the error message shown above.

Now I'm stuck. Please help me to get this installation completed.

[nbolyard]

Compressed version of the log of the failed install attempt.

[kencu (Ken)]

This is our bad. gcc versions less than 5.0 are known to fail on newer systems. Very sorry that our error messages are not up to date on this. I will try to update those error messages ASAP so this doesn't happen to anyone else.

I'll be closing this as a duplicate of other tickets which mention the same thing, but thank you for taking the time to place your report, and once again, sorry about our out-of-date error message. -- Best, Ken

[kencu (Ken)]

:info:build   :17   :  error: non-local symbol required in directive   
:info:build                     . n o^
:info:build _dead_strip L_OBJC_Module

[kencu (Ken)]

duplicate of 56996