[MacPorts] #57361: update gcc8-8.2.0_2 fails to build

[MacPorts]

#57361: update gcc8-8.2.0_2 fails to build
----------------------+--------------------
  Reporter:  murrayE  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.5.4
Resolution:           |   Keywords:
      Port:  gcc8     |
----------------------+--------------------

Comment (by michaelld):

 looks like this is the error:
 {{{
 :info:build In file included from
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/libstdc++-v3/src/filesystem
 /std-dir.cc:29:
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/build/x86_64
 -apple-darwin18/libstdc++-v3/include/filesystem:38:10: fatal error:
 bits/fs_dir.h: No such file or directory
 :info:build  #include <bits/fs_dir.h>
 :info:build           ^~~~~~~~~~~~~~~
 :info:build compilation terminated.
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/57361#comment:2>
MacPorts <https://www.macports.org/>
Ports system for macOS