libgcc build failure

[michael.f.corcoran@…]

% uname -a
 Darwin Kernel Version 15.6.0: Mon Aug 29 20:21:34 PDT 2016; root:xnu-3248.60.11~1/RELEASE_X86_64 x86_64

did a port selfupdate then a port upgrade outdated, and libgcc fails with the following

[gs66w-corcoran:~] corcoran% sudo port upgrade outdated
Password:
--->  Computing dependencies for libgcc
--->  Building libgcc
Error: org.macports.build for port libgcc returned: command execution failed
Please see the log file for port libgcc for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_lang_gcc6/libgcc/main.log
Error: Unable to upgrade port: 1

the log file shows

... stuff deleted...

:info:build Adding multilib support to Makefile in /opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_lang_gcc6/libgcc/work/gcc-6.2.0/libgfortran
:info:build with_multisubdir=i386
:info:build config.status: executing depfiles commands
:info:build config.status: executing libtool commands
:info:build config.status: executing gstdint.h commands
:info:build config.status: executing depfiles commands
:info:build config.status: executing libtool commands
:info:build config.status: executing gstdint.h commands
:info:build make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_lang_gcc6/libgcc/work/build'
:info:build make: *** [bootstrap-lean] Error 2
:info:build make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_lang_gcc6/libgcc/work/build'
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_lang_gcc6/libgcc/work/build" && /usr/bin/make -j8 -w bootstrap-lean
:info:build Exit code: 2
:error:build org.macports.build for port libgcc returned: command execution failed
:debug:build Error code: CHILDSTATUS 21356 2
:debug:build Backtrace: command execution failed
    while executing
"system -nice 0 $fullcmdstring"
    ("eval" body line 1)
    invoked from within
"eval system $notty $nice \$fullcmdstring"
    invoked from within
"command_exec build"
    (procedure "portbuild::build_main" line 8)
    invoked from within
"portbuild::build_main org.macports.build"
    ("eval" body line 1)
    invoked from within
"eval $procedure $targetname"
:info:build Warning: targets not executed for libgcc: org.macports.install org.macports.build org.macports.destroot
:notice:build Please see the log file for port libgcc for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_lang_gcc6/libgcc/main.log

[mf2k (Frank Schima)]

The Priority field is for use by Macports team members only.

[ryandesign (Ryan Carsten Schmidt)]

The transcript you provided shows an unclean build attempt. Please ​clean and try again. If it fails again, attach the complete main.log file.

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