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Forum Update on Monday, May 27th 2025

Windows 10 Qt Installation Issues

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  • R Offline
    R Offline
    Rick4
    wrote on last edited by
    #1

    Not sure if this is the right "Installation and Deployment" thread, but I am having issues running and compiling projects on my Windows 10 x64 computer using mingw492_32.

    I have been trying to compile and test several demos, and on average, I get 10,000 to 15,000 compile errors. Everything from invalid variable declaration to invalid command usage. Clocks gives me 15079 issues alone.

    Has anyone had any success/tips/issues for installing and compiling on Windows 10 x64?

    Thanks in advance.

    1 Reply Last reply
    0
    • JKSHJ Offline
      JKSHJ Offline
      JKSH
      Moderators
      wrote on last edited by
      #2

      Hi, and welcome to the Qt Dev Net!

      Please post your first few error messages. Without them, we can't tell what's wrong.

      I've been using Qt for MinGW 4.9.2 (32-bit) on Windows 10 x64 for 2 months now with no problems.

      Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

      R 1 Reply Last reply
      0
      • JKSHJ JKSH

        Hi, and welcome to the Qt Dev Net!

        Please post your first few error messages. Without them, we can't tell what's wrong.

        I've been using Qt for MinGW 4.9.2 (32-bit) on Windows 10 x64 for 2 months now with no problems.

        R Offline
        R Offline
        Rick4
        wrote on last edited by
        #3

        @JKSH

        There are 15000+ messages from the compile, but here's the gist...

        Using the available demo Clocks
        Qt installation Path: C:\Qt
        Work path: C:\Qt\WORKSPACE\build-Quick_HelloWorld-Desktop_Qt_5_5_0_MinGW_32bit-Debug

        Excerpt from Compile Output

        22:03:38: Running steps for project clocks...
        22:03:38: Configuration unchanged, skipping qmake step.
        22:03:39: Starting: "C:\Qt\Tools\mingw492_32\bin\mingw32-make.exe"
        C:/Qt/Tools/mingw492_32/bin/mingw32-make -f Makefile.Debug
        mingw32-make[1]: Entering directory 'C:/Qt/Examples/Qt-5.5/quick/demos/build-clocks-Desktop_Qt_5_5_0_MinGW_32bit-Debug'
        g++ -c -pipe -fno-keep-inline-dllexport -g -frtti -Wall -Wextra -fexceptions -mthreads -DUNICODE -DQT_QML_DEBUG -DQT_DECLARATIVE_DEBUG -DQT_QUICK_LIB -DQT_GUI_LIB -DQT_QML_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I..\clocks -I. -IC:\Qt\5.5\mingw492_32\include -IC:\Qt\5.5\mingw492_32\include\QtQuick -IC:\Qt\5.5\mingw492_32\include\QtGui -IC:\Qt\5.5\mingw492_32\include\QtANGLE -IC:\Qt\5.5\mingw492_32\include\QtQml -IC:\Qt\5.5\mingw492_32\include\QtNetwork -IC:\Qt\5.5\mingw492_32\include\QtCore -Idebug -IC:\Qt\5.5\mingw492_32\mkspecs\win32-g++ -o debug\main.o ..\clocks\main.cpp
        In file included from C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/string:53:0,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qbytearray.h:45,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qstring.h:42,
        from C:\Qt\5.5\mingw492_32\include\QtCore/qdir.h:37,
        from C:\Qt\5.5\mingw492_32\include\QtCore/QDir:1,
        from ..\clocks../../shared/shared.h:40,
        from ..\clocks\main.cpp:40:
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:50:5: error: 'std::basic_string<_CharT, _Traits, _Alloc>::_Rep' is not a type
        basic_string<_CharT, _Traits, _Alloc>::
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:51:11: error: invalid use of dependent type 'typename std::basic_string<_CharT, _Traits, _Alloc>::_Rep'
        _Rep::_S_max_size = (((npos - sizeof(_Rep_base))/sizeof(_CharT)) - 1) / 4;
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:51:28: error: 'npos' was not declared in this scope
        _Rep::_S_max_size = (((npos - sizeof(_Rep_base))/sizeof(_CharT)) - 1) / 4;
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:51:42: error: '_Rep_base' was not declared in this scope
        _Rep::_S_max_size = (((npos - sizeof(_Rep_base))/sizeof(_CharT)) - 1) / 4;
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:55:5: error: 'std::basic_string<_CharT, _Traits, _Alloc>::_Rep' is not a type
        basic_string<_CharT, _Traits, _Alloc>::
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:56:11: error: invalid use of dependent type 'typename std::basic_string<_CharT, _Traits, _Alloc>::_Rep'
        _Rep::_S_terminal = _CharT();
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:60:44: error: template definition of non-template 'const typename std::basic_string<_CharT, _Traits, _Alloc>::size_type std::basic_string<_CharT, _Traits, _Alloc>::npos'
        basic_string<_CharT, _Traits, _Alloc>::npos;
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:66:5: error: 'std::basic_string<_CharT, _Traits, _Alloc>::_Rep' is not a type
        basic_string<_CharT, _Traits, _Alloc>::_Rep::_S_empty_rep_storage[
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:67:13: error: '_Rep_base' was not declared in this scope
        (sizeof(_Rep_base) + sizeof(_CharT) + sizeof(size_type) - 1) /
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:67:50: error: 'size_type' was not declared in this scope
        (sizeof(_Rep_base) + sizeof(_CharT) + sizeof(size_type) - 1) /
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:68:14: error: 'size_type' was not declared in this scope
        sizeof(size_type)];
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:79:24: error: invalid use of incomplete type 'class std::basic_string<_CharT, _Traits, _Alloc>'
        input_iterator_tag)
        ^
        In file included from C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/string:39:0,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qbytearray.h:45,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qstring.h:42,
        from C:\Qt\5.5\mingw492_32\include\QtCore/qdir.h:37,
        from C:\Qt\5.5\mingw492_32\include\QtCore/QDir:1,
        from ..\clocks../../shared/shared.h:40,
        from ..\clocks\main.cpp:40:
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/stringfwd.h:57:11: error: declaration of 'class std::basic_string<_CharT, _Traits, _Alloc>'
        class basic_string;
        ^
        In file included from C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/string:53:0,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qbytearray.h:45,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qstring.h:42,
        from C:\Qt\5.5\mingw492_32\include\QtCore/qdir.h:37,
        from C:\Qt\5.5\mingw492_32\include\QtCore/QDir:1,
        from ..\clocks../../shared/shared.h:40,
        from ..\clocks\main.cpp:40:
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:125:26: error: invalid use of incomplete type 'class std::basic_string<_CharT, _Traits, _Alloc>'
        forward_iterator_tag)
        ^
        In file included from C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/string:39:0,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qbytearray.h:45,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qstring.h:42,
        from C:\Qt\5.5\mingw492_32\include\QtCore/qdir.h:37,
        from C:\Qt\5.5\mingw492_32\include\QtCore/QDir:1,
        from ..\clocks../../shared/shared.h:40,
        from ..\clocks\main.cpp:40:
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/stringfwd.h:57:11: error: declaration of 'class std::basic_string<_CharT, _Traits, _Alloc>'
        class basic_string;
        ^
        In file included from C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/string:53:0,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qbytearray.h:45,
        from C:\Qt\5.5\mingw492_32\include/QtCore/qstring.h:42,
        from C:\Qt\5.5\mingw492_32\include\QtCore/qdir.h:37,
        from C:\Qt\5.5\mingw492_32\include\QtCore/QDir:1,
        from ..\clocks../../shared/shared.h:40,
        from ..\clocks\main.cpp:40:
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:153:18: error: template definition of non-template '_CharT* std::basic_string<_CharT, _Traits, _Alloc>::_S_construct'
        _S_construct(size_type __n, _CharT __c, const _Alloc& __a)
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:153:18: error: 'size_type' was not declared in this scope
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:153:40: error: expected primary-expression before '__c'
        _S_construct(size_type __n, _CharT __c, const _Alloc& __a)
        ^
        C:/Qt/Tools/mingw492_32/i686-w64-mingw32/include/c++/bits/basic_string.tcc:153:45: error: expected primary-expression before 'const'
        _S_construct(size_type __n, _CharT __c, const _Alloc& __a)
        ^

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        • hskoglundH Offline
          hskoglundH Offline
          hskoglund
          wrote on last edited by
          #4

          Hi, I also have Qt with mingw492_32 installed on my Windows 10, just tested and the clocks example compiled fine, no problems (i.e. same as for JKSH).

          That first error message,
          'std::basic_string<_CharT, _Traits, _Alloc>::_Rep' is not a type

          does it reappear as the first one for others of your projects/examples?
          Also have you tried to update to 5.5.1?

          1 Reply Last reply
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