[MacPorts] #72669: gnuplot 6 install fails on macOS 13.7

[MacPorts]

#72669: gnuplot 6 install fails on macOS 13.7
----------------------+-------------------------
  Reporter:  pidloop  |      Owner:  Schamschula
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.10.7
Resolution:           |   Keywords:
      Port:  gnuplot  |
----------------------+-------------------------

Comment (by pidloop):

 Yes, I have those all marked {{{active}}} and a lot more:
 {{{
 ecd-imac27$ port installed | grep qt
   octave
 @8.1.0_0+app+docs+gfortran+graphicsmagick+openblas+qt5+sound+sundials
   octave
 @8.2.0_0+app+docs+gfortran+graphicsmagick+openblas+qt5+sound+sundials
 (active)
   py39-sphinxcontrib-qthelp @1.0.3_0 (active)
   py311-pyqt5 @5.15.9_0 (active)
   py311-pyqt5-sip @12.12.1_0 (active)
   py311-pyqt5-webengine @5.15.6_1 (active)
   qscintilla-qt5 @2.13.3_0 (active)
   qt5 @5.15.15_0 (active)
   qt5-qt3d @5.15.8_0
   qt5-qt3d @5.15.15_0 (active)
   qt5-qtbase @5.15.8_0+openssl
   qt5-qtbase @5.15.8_1+openssl
   qt5-qtbase @5.15.10_0+openssl
   qt5-qtbase @5.15.12_1+openssl
   qt5-qtbase @5.15.15_2+openssl (active)
   qt5-qtcharts @5.15.10_0 (active)
   qt5-qtconnectivity @5.15.8_0
   qt5-qtconnectivity @5.15.15_0 (active)
   qt5-qtdeclarative @5.15.8_0
   qt5-qtdeclarative @5.15.12_0
   qt5-qtdeclarative @5.15.15_0 (active)
   qt5-qtgamepad @5.15.8_0
   qt5-qtgamepad @5.15.15_0 (active)
   qt5-qtgraphicaleffects @5.15.8_0
   qt5-qtgraphicaleffects @5.15.12_0
   qt5-qtgraphicaleffects @5.15.15_0 (active)
   qt5-qtimageformats @5.15.8_0
   qt5-qtimageformats @5.15.12_0
   qt5-qtimageformats @5.15.15_0 (active)
   qt5-qtlocation @5.15.8_1
   qt5-qtlocation @5.15.12_0
   qt5-qtlocation @5.15.15_2 (active)
   qt5-qtmacextras @5.15.8_0
   qt5-qtmacextras @5.15.15_0 (active)
   qt5-qtmultimedia @5.15.8_0
   qt5-qtmultimedia @5.15.15_0 (active)
   qt5-qtnetworkauth @5.15.8_0
   qt5-qtnetworkauth @5.15.15_0 (active)
   qt5-qtquickcontrols @5.15.8_0
   qt5-qtquickcontrols @5.15.12_0
   qt5-qtquickcontrols @5.15.15_0 (active)
   qt5-qtquickcontrols2 @5.15.8_0
   qt5-qtquickcontrols2 @5.15.12_0
   qt5-qtquickcontrols2 @5.15.15_0 (active)
   qt5-qtremoteobjects @5.15.8_0
   qt5-qtremoteobjects @5.15.15_0 (active)
   qt5-qtscript @5.15.8_0 (active)
   qt5-qtscxml @5.15.8_0
   qt5-qtscxml @5.15.15_0 (active)
   qt5-qtsensors @5.15.8_0
   qt5-qtsensors @5.15.15_0 (active)
   qt5-qtserialbus @5.15.8_0
   qt5-qtserialbus @5.15.15_0 (active)
   qt5-qtserialport @5.15.8_0
   qt5-qtserialport @5.15.12_0
   qt5-qtserialport @5.15.15_0 (active)
   qt5-qtspeech @5.15.8_0
   qt5-qtspeech @5.15.15_0 (active)
   qt5-qtsvg @5.15.8_0
   qt5-qtsvg @5.15.10_0
   qt5-qtsvg @5.15.12_0
   qt5-qtsvg @5.15.15_0 (active)
   qt5-qttools @5.15.8_0
   qt5-qttools @5.15.15_1 (active)
   qt5-qttranslations @5.15.8_1
   qt5-qttranslations @5.15.15_0 (active)
   qt5-qtwebchannel @5.15.8_0
   qt5-qtwebchannel @5.15.15_0 (active)
   qt5-qtwebengine @5.15.13_1 (active)
   qt5-qtwebsockets @5.15.8_0
   qt5-qtwebsockets @5.15.15_0 (active)
   qt5-qtxmlpatterns @5.15.8_0
   qt5-qtxmlpatterns @5.15.15_0 (active)
   qt5-sqlite-plugin @5.15.8_0
   qt5-sqlite-plugin @5.15.15_0 (active)
 }}}

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Ticket URL: <https://trac.macports.org/ticket/72669#comment:7>
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