Hi Christian, I am not mixing versions of gwenhywfar. Have installed either one or the other. Right now I installed 4.15.2beta even - which has the same problem.
But well, with 4.14.0 KMM wouldn’t build - as described earlier. I haven’t checked up to now whether the older version still shipped said file. I am using downloads directly from upstream, how come this surfaces only for me? Greets, Marko $ 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