Qt 6.10 failing compilation on "qsocketnotifier"

MaximeCD

Hello,

Following security issues, we tried updating to latest qt available 6.10, building it from sources from the download.qt.io website.
For some reasons though, it fails quite early during the "qsocketnotifier" file compilation, the main error being:
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(262): error C2065: 'result': undeclared identifier

Here are the error messages for more details:

FAILED: [code=2] qtbase/src/corelib/CMakeFiles/Core.dir/kernel/qsocketnotifier.cpp.obj 
C:\PROGRA~1\MIB055~1\2022\PROFES~1\VC\Tools\MSVC\1430~1.307\bin\Hostx64\x64\cl.exe  /nologo /TP -DCore_EXPORTS -DNOMINMAX -DPCRE2_CODE_UNIT_WIDTH=16 -DPCRE2_STATIC -DQT_ASCII_CAST_WARNINGS -DQT_BUILDING_QT -DQT_BUILD_CORE_LIB -DQT_DEPRECATED_WARNINGS -DQT_EXPLICIT_QFILE_CONSTRUCTION_FROM_PATH -DQT_LEAN_HEADERS=1 -DQT_MOC_COMPAT -DQT_NO_CONTEXTLESS_CONNECT -DQT_NO_DEBUG -DQT_NO_FOREACH -DQT_NO_JAVA_STYLE_ITERATORS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_QASCONST -DQT_NO_QEXCHANGE -DQT_NO_QPAIR -DQT_NO_QSNPRINTF -DQT_NO_STD_FORMAT_SUPPORT -DQT_NO_USING_NAMESPACE -DQT_TYPESAFE_FLAGS -DQT_USE_NODISCARD_FILE_OPEN -DQT_USE_QSTRINGBUILDER -DQT_ZLIB_LIB -DUNICODE -DWIN32 -DWIN64 -D_CRT_SECURE_NO_WARNINGS -D_ENABLE_EXTENDED_ALIGNED_STORAGE -D_UNICODE -D_USE_MATH_DEFINES -D_WIN64 -D_WINDLL -IC:\Qt_build\qtbase\src\corelib\Core_autogen\include -IC:\Qt_build\qtbase\include -IC:\Qt_build\qtbase\include\QtCore -IC:\Qt\qt-everywhere-src-6.10.0\qtbase\src\corelib -IC:\Qt_build\qtbase\src\corelib -IC:\Qt_build\qtbase\src\corelib\global -IC:\Qt_build\qtbase\src\corelib\kernel -IC:\Qt\qt-everywhere-src-6.10.0\qtbase\src\corelib\..\3rdparty\tinycbor\src -IC:\Qt_build\qtbase\include\QtCore\6.10.0 -IC:\Qt_build\qtbase\include\QtCore\6.10.0\QtCore -IC:\Qt\qt-everywhere-src-6.10.0\qtbase\src\corelib\..\3rdparty\double-conversion\double-conversion -IC:\Qt\qt-everywhere-src-6.10.0\qtbase\src\corelib\..\3rdparty\double-conversion -IC:\Qt_build\qtbase\src\corelib\.rcc -IC:\Qt\qt-everywhere-src-6.10.0\qtbase\mkspecs\win32-msvc -IC:\Qt_build\qtbase\include\QtZlib -IC:\Qt\qt-everywhere-src-6.10.0\qtbase\src\3rdparty\zlib -IC:\Qt_build\qtbase\src\3rdparty\zlib -IC:\Qt\qt-everywhere-src-6.10.0\qtbase\src\3rdparty\pcre2\src /DWIN32 /D_WINDOWS /Zi     /DNDEBUG -O2 -Ob3 -std:c++17 -MD /W3 /wd5105 -Zc:__cplusplus -permissive- -utf-8 -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -Zc:referenceBinding -Zc:ternary -Zc:externConstexpr -Zc:wchar_t -bigobj -guard:cf -Gw /EHsc /d2FH4 /showIncludes /Foqtbase\src\corelib\CMakeFiles\Core.dir\kernel\qsocketnotifier.cpp.obj /Fdqtbase\src\corelib\CMakeFiles\Core.dir\ /FS -c C:\Qt\qt-everywhere-src-6.10.0\qtbase\src\corelib\kernel\qsocketnotifier.cpp
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(408): warning C4305: 'if': truncation from 'size_t' to 'bool'
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(408): note: while compiling class template member function 'QtMocHelpers::FunctionData<F,4>::FunctionData(uint,uint,uint,uint,std::array<QtMocHelpers::FunctionData<F,4>::FunctionParameter,2>)'
C:\Qt\qt-everywhere-src-6.10.0\qtbase\src\corelib\kernel\qsocketnotifier.h(15): note: while evaluating constexpr function 'QSocketNotifier::qt_create_metaobjectdata'
C:\Qt\qt-everywhere-src-6.10.0\qtbase\src\corelib\kernel\qsocketnotifier.h(15): note: see reference to variable template 'const QtMocHelpers::MetaObjectContents<53,16,101,10> QSocketNotifier::qt_staticMetaObjectContent<`anonymous namespace'::qt_meta_tag_ZN15QSocketNotifierE_t>' being compiled
C:\Qt_build\qtbase\src\corelib\Core_autogen\include\moc_qsocketnotifier.cpp(78): note: see reference to variable template 'const auto QSocketNotifier::qt_staticMetaObjectStaticContent<`anonymous namespace'::qt_meta_tag_ZN15QSocketNotifierE_t>' being compiled
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(262): error C2065: 'result': undeclared identifier
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(200): note: see reference to function template instantiation 'auto QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::copyTo::<lambda_516565b1e1cb9a5944561498aff3bc0f>::operator ()<T>(const T &) const' being compiled
        with
        [
            T=QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>
        ]
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(200): note: see reference to function template instantiation 'auto QtMocHelpers::detail::UintDataStorage<std::integer_sequence<int,0,1,2,3>,QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::forEach::<lambda_c5853e91abea1dd4427102778104cba3>::operator ()<QtMocHelpers::detail::UintDataEntry<0,QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>>>(const QtMocHelpers::detail::UintDataEntry<0,QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>> &) const' being compiled
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(252): note: see reference to function template instantiation 'void QtMocHelpers::detail::UintDataStorage<std::integer_sequence<int,0,1,2,3>,QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::forEach<QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::copyTo::<lambda_516565b1e1cb9a5944561498aff3bc0f>>(F &&) const' being compiled
        with
        [
            F=QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::copyTo::<lambda_516565b1e1cb9a5944561498aff3bc0f>
        ]
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(255): note: see reference to function template instantiation 'void QtMocHelpers::detail::UintDataStorage<std::integer_sequence<int,0,1,2,3>,QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::forEach<QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::copyTo::<lambda_516565b1e1cb9a5944561498aff3bc0f>>(F &&) const' being compiled
        with
        [
            F=QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::copyTo::<lambda_516565b1e1cb9a5944561498aff3bc0f>
        ]
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(563): note: see reference to function template instantiation 'void QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::copyTo<Unique,QtMocHelpers::MetaObjectContents<53,16,101,10>>(Result &,size_t,uint &) const' being compiled
        with
        [
            Unique=`anonymous-namespace'::qt_meta_tag_ZN15QSocketNotifierE_t,
            Result=QtMocHelpers::MetaObjectContents<53,16,101,10>
        ]
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(563): note: see reference to function template instantiation 'void QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::copyTo<Unique,QtMocHelpers::MetaObjectContents<53,16,101,10>>(Result &,size_t,uint &) const' being compiled
        with
        [
            Unique=`anonymous-namespace'::qt_meta_tag_ZN15QSocketNotifierE_t,
            Result=QtMocHelpers::MetaObjectContents<53,16,101,10>
        ]
C:\Qt_build\qtbase\src\corelib\Core_autogen\include\moc_qsocketnotifier.cpp(74): note: see reference to function template instantiation 'QtMocHelpers::MetaObjectContents<53,16,101,10> QtMocHelpers::metaObjectData<QSocketNotifier,`anonymous-namespace'::qt_meta_tag_ZN15QSocketNotifierE_t,QtMocHelpers::StringRefStorage<char [16],char [10],char [1],char [18],char [7],char [22],char [16],char [11]>,QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>,QtMocHelpers::UintData<>,QtMocHelpers::UintData<>,QtMocHelpers::UintData<>,QtMocHelpers::detail::UintDataBlock<0,0>>(uint,const Strings &,const Methods &,const Properties &,const Enums &,const Constructors &,const ClassInfo &)' being compiled
        with
        [
            Strings=QtMocHelpers::StringRefStorage<char [16],char [10],char [1],char [18],char [7],char [22],char [16],char [11]>,
            Methods=QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>,
            Properties=QtMocHelpers::UintData<>,
            Enums=QtMocHelpers::UintData<>,
            Constructors=QtMocHelpers::UintData<>,
            ClassInfo=QtMocHelpers::detail::UintDataBlock<0,0>
        ]
C:/Qt/qt-everywhere-src-6.10.0/qtbase/src/corelib/kernel/qtmochelpers.h(563): note: while evaluating constexpr function 'QtMocHelpers::UintData<QtMocHelpers::SignalData<void (QSocketDescriptor,QSocketNotifier::Type)>,QtMocHelpers::SignalData<void (QSocketDescriptor)>,QtMocHelpers::SignalData<void (int)>,QtMocHelpers::SlotData<void (bool)>>::copyTo'
C:\Qt_build\qtbase\src\corelib\Core_autogen\include\moc_qsocketnotifier.cpp(73): note: while evaluating constexpr function 'QtMocHelpers::metaObjectData'
C:\Qt\qt-everywhere-src-6.10.0\qtbase\src\corelib\kernel\qsocketnotifier.h(15): note: while evaluating constexpr function 'QSocketNotifier::qt_create_metaobjectdata'

I am compiling with Visual Studio 2022, cmake (tested with v4 and 3.31 to see if there was any differences), with these options
C:\Qt\qt-everywhere-src-6.10.0/qtbase/configure.bat -top-level -prefix C:/deps/Qt -release -force-debug-info -separate-debug-info -shared -skip qtconnectivity -skip qtdeclarative -skip qtlocation -skip qtmultimedia -skip qtquick1 -skip qtquickcontrols -skip qtsensors -skip qtwebsockets -skip qtwinextras -skip qtwebchannel -skip qtwebengine -skip qtwebkit -skip qtwebkit-examples -nomake examples -nomake tests -submodules qt3d,qtsvg -- -DBUILD_qt3d=ON -DBUILD_qtsvg=ON

Would you have any idea?

Thanks
Regards
Maxime

Christian Ehrlicher

17.0 is to old. Update to a recent version (17.14.x)

Christian Ehrlicher

What exact VS2022 version do you use? Please also see what cl.exe version you are using.

MaximeCD

Here is the result from cmake,

-- The CXX compiler identification is MSVC 19.30.30715.0
-- The C compiler identification is MSVC 19.30.30715.0

And the visual studio version, from the command prompt in which we are launching the commands

** Visual Studio 2022 Developer Command Prompt v17.0.23

Christian Ehrlicher

17.0 is to old. Update to a recent version (17.14.x)

MaximeCD

Ok, got to use a newer version of the image I ran this on, it worked fine with 17.9.3.
Thank you very much for the quick answer!