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  1. Qt Creator
  2. QTCREATORBUG-20520

QtCreator failed to build with std:c++17 + msvc on windows

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    • Icon: Bug Bug
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    • Qt Creator 4.14.0-beta1
    • Qt Creator 4.6.1
    • Building Qt Creator
    • None
    • Visual studio 2017 15.7.2 + windows server 2016 +QT 5.11RC
    • d400dce35d817afd719ffadf8c8f43c8814c05c1 (qt-creator/qt-creator/master)

      QtCreator(master branch) with std:c++17  failed due to error C2668, it should be source issue, which involved by QTCreator revision http://code.qt.io/cgit/qt-creator/qt-creator.git/commit/src/plugins/nim?id=522492d85d4ef1db119b4fbfa5d33f9166e7a206,

      Gcc and Clang both reject the code, one possible fix is to remove the second overload if /std:c++17 is used.

       Here is the steps that I used to build QTCreator:
       1. git clone git://code.qt.io/qt-creator/qt-creator.git D:\QTCreator\src
       2. Open a VS 2017 x86 command prompt and browse to D:\QTCreator\src
       3. set _CL_=/D_HAS_AUTO_PTR_ETC=1 /std:c++l7
       4. qmake -r qtcreator.pro
       5. jom

      Failures

      D:\QTCreator\src\src\plugins\nim\project\nimproject.cpp(133): error C2668: 'Utils::transform': ambiguous call to overloaded function
..\..\libs\utils/algorithm.h(386): note: could be 'decltype(auto) Utils::transform<std::vector,T,Nim::NimProject::updateProject::<lambda_2bea39ad1c5dda6f046e1cbf9aa18202>,ProjectExplorer::FileNode*,std::unique_ptr<ProjectExplorer::FileNode,std::default_delete<_Ty>>,std::vector<std::unique_ptr<_Ty,std::default_delete<_Ty>>,std::allocator<std::unique_ptr<_Ty,std::default_delete<_Ty>>>>>(SC &&,F)'
        with
        [
            T=QList<ProjectExplorer::FileNode *>,
            _Ty=ProjectExplorer::FileNode,
            SC=QList<ProjectExplorer::FileNode *>,
            F=Nim::NimProject::updateProject::<lambda_2bea39ad1c5dda6f046e1cbf9aa18202>
        ]
..\..\libs\utils/algorithm.h(374): note: or       'decltype(auto) Utils::transform<std::vector,T,Nim::NimProject::updateProject::<lambda_2bea39ad1c5dda6f046e1cbf9aa18202>,ProjectExplorer::FileNode*,std::unique_ptr<ProjectExplorer::FileNode,std::default_delete<_Ty>>,std::vector<std::unique_ptr<_Ty,std::default_delete<_Ty>>,std::allocator<std::unique_ptr<_Ty,std::default_delete<_Ty>>>>>(SC &&,F)'
        with
        [
            T=QList<ProjectExplorer::FileNode *>,
            _Ty=ProjectExplorer::FileNode,
            SC=QList<ProjectExplorer::FileNode *>,
            F=Nim::NimProject::updateProject::<lambda_2bea39ad1c5dda6f046e1cbf9aa18202>
        ]
D:\QTCreator\src\src\plugins\nim\project\nimproject.cpp(134): note: while trying to match the argument list '(T, Nim::NimProject::updateProject::<lambda_2bea39ad1c5dda6f046e1cbf9aa18202>)'
        with
        [
            T=QList<ProjectExplorer::FileNode *>
        ]
D:\QTCreator\src\src\plugins\nim\project\nimproject.cpp(135): warning C4834: discarding return value of function with 'nodiscard' attribute

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            con Eike Ziller
            phoebehui phoebehui hui
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