Moc file compilation error, missing Q_OS_MAC, 5.8 fails to build on macOS Sierra 10.12.2

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -c -Xclang -include-pch -Xclang .pch/debug/QtPrintSupport_debug/objective-c++.pch -pipe -stdlib=libc++ -g -std=c++1z -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -mmacosx-version-min=10.9  -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -fPIC -DQT_NO_USING_NAMESPACE -DQT_NO_FOREACH -DQT_BUILD_PRINTSUPPORT_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -Idialogs -I../../include -I../../include/QtPrintSupport -I../../include/QtPrintSupport/5.8.1 -I../../include/QtPrintSupport/5.8.1/QtPrintSupport -I../../include/QtWidgets/5.8.1 -I../../include/QtWidgets/5.8.1/QtWidgets -I../../include/QtGui/5.8.1 -I../../include/QtGui/5.8.1/QtGui -I../../include/QtCore/5.8.1 -I../../include/QtCore/5.8.1/QtCore -I../../include/QtWidgets -I../../include/QtGui -I../../include/QtCore -I.moc/debug -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/OpenGL.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AGL.framework/Headers -I.uic -I../../mkspecs/macx-clang -F/Users/ddd/Work/qt5/qtbase/lib -o .obj/debug/qprintdialog_mac.o dialogs/qprintdialog_mac.mm
In file included from dialogs/qprintdialog_mac.mm:360:
.moc/release/moc_qprintdialog.cpp:99:31: error: no member named
      '_q_togglePageSetCombo' in 'QPrintDialogPrivate'
        case 1: _t->d_func()->_q_togglePageSetCombo((*reinterpret_cast< ...
                ~~~~~~~~~~~~  ^
.moc/release/moc_qprintdialog.cpp:100:31: error: no member named
      '_q_collapseOrExpandDialog' in 'QPrintDialogPrivate'
        case 2: _t->d_func()->_q_collapseOrExpandDialog(); break;
                ~~~~~~~~~~~~  ^
.moc/release/moc_qprintdialog.cpp:101:31: error: no member named
      '_q_checkFields' in 'QPrintDialogPrivate'
        case 3: _t->d_func()->_q_checkFields(); break;
                ~~~~~~~~~~~~  ^
3 errors generated.
make[4]: *** [.obj/release/qprintdialog_mac.o] Error 1
make[3]: *** [release-all] Error 2
make[3]: *** Waiting for unfinished jobs....
In file included from dialogs/qprintdialog_mac.mm:360:
.moc/debug/moc_qprintdialog.cpp:99:31: error: no member named
      '_q_togglePageSetCombo' in 'QPrintDialogPrivate'
        case 1: _t->d_func()->_q_togglePageSetCombo((*reinterpret_cast< ...
                ~~~~~~~~~~~~  ^
.moc/debug/moc_qprintdialog.cpp:100:31: error: no member named
      '_q_collapseOrExpandDialog' in 'QPrintDialogPrivate'
        case 2: _t->d_func()->_q_collapseOrExpandDialog(); break;
                ~~~~~~~~~~~~  ^
.moc/debug/moc_qprintdialog.cpp:101:31: error: no member named '_q_checkFields'
      in 'QPrintDialogPrivate'
        case 3: _t->d_func()->_q_checkFields(); break;
                ~~~~~~~~~~~~  ^
3 errors generated.
make[4]: *** [.obj/debug/qprintdialog_mac.o] Error 1
make[3]: *** [debug-all] Error 2
make[2]: *** [sub-printsupport-make_first] Error 2
make[1]: *** [sub-src-make_first] Error 2
make: *** [module-qtbase-make_first] Error 2