Ah, I see, the pc file for cpp is missing: --- $ port contents gwenhywfar4-devel | grep -- -cpp /opt/local/include/gwenhywfar4/gwen-gui-cpp/api.h /opt/local/include/gwenhywfar4/gwen-gui-cpp/cppdialog.hpp /opt/local/include/gwenhywfar4/gwen-gui-cpp/cppgui.hpp /opt/local/include/gwenhywfar4/gwen-gui-cpp/cppwidget.hpp /opt/local/lib/libgwengui-cpp.0.dylib /opt/local/lib/libgwengui-cpp.a /opt/local/lib/libgwengui-cpp.dylib
$ port contents gwenhywfar4-devel | grep -- -qt4 /opt/local/include/gwenhywfar4/gwen-gui-qt4/qt4_gui.hpp /opt/local/lib/cmake/gwengui-qt4-4.14/gwengui-qt4-config-version.cmake /opt/local/lib/cmake/gwengui-qt4-4.14/gwengui-qt4-config.cmake /opt/local/lib/libgwengui-qt4.0.dylib /opt/local/lib/libgwengui-qt4.a /opt/local/lib/libgwengui-qt4.dylib /opt/local/lib/pkgconfig/gwengui-qt4.pc --- That’s an upstream issue then. Don’t know whether this file exists for version 4.13.0...
