Compilation error on Mac for builderext moc

[Arthoni]

Occured in Github action:

 [ 27%] Building CXX object src/openfluid/ui/builderext/CMakeFiles/openfluid-ui-builderext.dir/openfluid-ui-builderext_autogen/mocs_compilation.cpp.o
In file included from /Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/mocs_compilation.cpp:2:
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:16:2: error: "This file was generated using the moc from 5.15.10. It"
#error "This file was generated using the moc from 5.15.10. It"
 ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:17:2: error: "cannot be used with the include files from this version of Qt."
#error "cannot be used with the include files from this version of Qt."
 ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:18:2: error: "(The moc has changed too much.)"
#error "(The moc has changed too much.)"
 ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:35:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(0, 0, 50), // "openfluid::ui::builderext::Pl..."
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:36:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(1, 51, 13), // "fluidxChanged"
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:37:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(2, 65, 0), // ""
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:38:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(3, 66, 51), // "openfluid::ui::builderext::Fl..."
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:39:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(4, 118, 11), // "UpdateFlags"
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:40:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(5, 130, 6), // "update"
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:41:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(6, 137, 21), // "manageSimulationStart"
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:42:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(7, 159, 22) // "manageSimulationFinish"
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:112:1: error: unknown type name 'QT_INIT_METAOBJECT'
QT_INIT_METAOBJECT const QMetaObject openfluid::ui::builderext::PluggableModalExtension::staticMetaObject = { {
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModalExtension.cpp:112:37: error: expected ';' after top level declarator
QT_INIT_METAOBJECT const QMetaObject openfluid::ui::builderext::PluggableModalExtension::staticMetaObject = { {
                                    ^
                                    ;
In file included from /Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/mocs_compilation.cpp:3:
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModelessExtension.cpp:16:2: error: "This file was generated using the moc from 5.15.10. It"
#error "This file was generated using the moc from 5.15.10. It"
 ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModelessExtension.cpp:17:2: error: "cannot be used with the include files from this version of Qt."
#error "cannot be used with the include files from this version of Qt."
 ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModelessExtension.cpp:18:2: error: "(The moc has changed too much.)"
#error "(The moc has changed too much.)"
 ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModelessExtension.cpp:35:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(0, 0, 53), // "openfluid::ui::builderext::Pl..."
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModelessExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModelessExtension.cpp:36:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(1, 54, 13), // "fluidxChanged"
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModelessExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModelessExtension.cpp:37:1: error: use of undeclared identifier 'Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET'
QT_MOC_LITERAL(2, 68, 0), // ""
^
/Users/runner/work/openfluid/openfluid/_build/src/openfluid/ui/builderext/openfluid-ui-builderext_autogen/EWIEGA46WW/moc_PluggableModelessExtension.cpp:29:5: note: expanded from macro 'QT_MOC_LITERAL'
    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
    ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.

[Arthoni]

Fixed by simply changing whole code base to Qt6.