[MacPorts] #56941: cmake @3.12.0_0 and gcc7 @7.3.0_3 don't work well together

[MacPorts]

#56941: cmake @3.12.0_0 and gcc7 @7.3.0_3 don't work well together
-------------------------+-----------------------
  Reporter:  iqgrande    |      Owner:  michaelld
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.5.3
Resolution:              |   Keywords:
      Port:  cmake, gcc  |
-------------------------+-----------------------

Comment (by iqgrande):

 Could this be environmental?

 {{{
 /opt/local/bin:/opt/local/sbin:/opt/ama/bin:/Users/iqgrande/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/opt/X11/bin
 Macswell:build iqgrande$ printenv
 TERM=xterm-256color
 SHELL=/bin/bash
 XLD=/Volumes/SeagateBUPDD4TB/Data/Music/XLD/
 GFORTRAN_CONVERT_UNIT=big_endian
 TMPDIR=/var/folders/7n/vz1b562x5ndbhsn7rgz_nb840000gp/T/
 SSH_CLIENT=10.0.1.24 33316 22
 OLDPWD=/Users/iqgrande/Desktop/macports_build_issues
 SSH_TTY=/dev/ttys005
 USER=iqgrande
 MAIL=/var/mail/iqgrande
 PATH=/opt/local/bin:/opt/local/sbin:/opt/ama/bin:/Users/iqgrande/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/opt/X11/bin
 PWD=/Users/iqgrande/Desktop/macports_build_issues/build
 EDITOR=/opt/local/bin/vim
 IPYTHONDIR=/Users/iqgrande/.ipython
 LANG=en_US.UTF-8
 EMACS_DIR=/Applications/MacPorts/Emacs.app/Contents/MacOS
 MOVIE=macabre:/Volumes/FreeAgent2/Data/Movies/
 SHLVL=1
 HOME=/Users/iqgrande
 GNUTERM=aqua
 EMACS_CLI=/opt/local/bin/emacs
 LOGNAME=iqgrande
 SSH_CONNECTION=10.0.1.24 33316 10.0.1.23 22
 EMACS_GCLIENT=/Applications/MacPorts/Emacs.app/Contents/MacOS/bin/emacsclient
 EMACS_GUI=/Applications/MacPorts/Emacs.app/Contents/MacOS/Emacs
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/56941#comment:10>
MacPorts <https://www.macports.org/>
Ports system for macOS