[MacPorts] #63018: Failed to build libgcc9 on Mac OS X 10.7.5

[MacPorts]

#63018: Failed to build libgcc9 on Mac OS X 10.7.5
-----------------------+---------------------
  Reporter:  YesNo801  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.7.1
Resolution:            |   Keywords:  libgcc9
      Port:  libgcc9   |
-----------------------+---------------------

Comment (by kencu):

 It looks like the build script is trying to "nm" some binary that doesn't
 actually exist:
 {{{
 :info:build /opt/local/bin/nm -P .libs/compatibility.o .libs
 /compatibility-debug_list.o .libs/compatibility-debug_list-2.o
 .libs/compatibility-c++0x.o .libs/compatibility-atomic-c++0x.o .libs
 /compatibility-thread-c++0x.o .libs/compatibility-chrono.o .libs
 /compatibility-condvar.o ../libsupc++/.libs/libsupc++convenience.a
 ../src/c++98/.libs/libc++98convenience.a
 ../src/c++11/.libs/libc++11convenience.a
 ../src/c++17/.libs/libc++17convenience.a|Can't exec "c++filt": No such
 file or directory at /opt/local/lib/perl5/5.28/IPC/Open3.pm line 281.
 :info:build open2: exec of c++filt -_ failed: No such file or directory at
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/work/gcc-9.4.0/libstdc++-v3/scripts/make_exports.pl
 line 95.
 :info:build warning: /opt/local/bin/nm: no name list
 :info:build warning: /opt/local/bin/nm: no name list
 :info:build make[6]: *** [libstdc++-symbols.explist] Error 1

 }}}

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Ticket URL: <https://trac.macports.org/ticket/63018#comment:1>
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