[MacPorts] #62021: gnuplot-5.4.1 fails to upgrade if +qt5 speficied

[MacPorts]

#62021: gnuplot-5.4.1 fails to upgrade if +qt5 speficied
-------------------------+------------------------
  Reporter:  mouse07410  |      Owner:  reneeotten
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:  fixed       |   Keywords:
      Port:  gnuplot     |
-------------------------+------------------------

Comment (by mouse07410):

 No joy. Same problem. Please see updated "main.log".
 {{{
 .  .  .  .  .
 :info:build In file included from
 /opt/local/libexec/qt5/lib/QtCore.framework/Headers/QtCore:4:
 :info:build In file included from
 /opt/local/libexec/qt5/lib/QtCore.framework/Headers/qglobal.h:105:
 :info:build
 /opt/local/libexec/qt5/lib/QtCore.framework/Headers/qcompilerdetection.h:590:6:
 error: Qt requires a C++11 compiler and yours does not seem to be that.
 :info:build #    error Qt requires a C++11 compiler and yours does not
 seem to be that.
 :info:build      ^
 .  .  .  .  .
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/62021#comment:3>
MacPorts <https://www.macports.org/>
Ports system for macOS