[MacPorts] #54829: libgcc6 @6.4.0: fatal error: bits/locale_facets.h: No such file or directory

[MacPorts]

#54829: libgcc6 @6.4.0: fatal error: bits/locale_facets.h: No such file or
directory
----------------------+------------------------
  Reporter:  braslau  |      Owner:
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.4.1
Resolution:           |   Keywords:  highsierra
      Port:  libgcc6  |
----------------------+------------------------

Comment (by bigmoe):

 Reproduced similar issues with (lib)gcc6, gcc7, and gcc8. Running High
 Sierra on an APFS SSD with Xcode 9.

 libgcc6:

 {{{
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc6/libgcc6/work/build/x86_64
 -apple-darwin17/libstdc++-v3/include/istream:39:19: fatal error: ostream:
 No such file or directory
 }}}


 gcc7:


 {{{
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc7/gcc7/work/gcc-7.2.0/libstdc++-v3/include/precompiled/stdc++.h:46:10:
 fatal error: cstdio: No such file or directory
 }}}


 gcc8 (beta)


 {{{
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc8
 /libgcc-devel/work/build/x86_64-apple-
 darwin17/libstdc++-v3/include/unordered_map:47:10: fatal error:
 bits/hashtable.h: No such file or directory
 }}}

--
Ticket URL: <https://trac.macports.org/ticket/54829#comment:8>
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