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(MySQL) qsqlmysql.dll doesn't get created.

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  • T Thelonious

    @Christian-Ehrlicher

    So I should move my recently created qsqlmysql.dll into the same folder as my project executable? Do I need to move my plugins from C:\Qt\6.4.3\msvc2019_64\build-sqldrivers?

    Thanks for your help,

    Christian EhrlicherC Online
    Christian EhrlicherC Online
    Christian Ehrlicher
    Lifetime Qt Champion
    wrote on last edited by
    #16

    @Thelonious said in (MySQL) qsqlmysql.dll doesn't get created.:

    So I should move my recently created qsqlmysql.dll into the same folder as my project executable?

    I never said this. I just think that C:\Qt\6.4.3\ is not the Qt you're using while running your executable. When you would have followed @jsulm's advise we would have known more.

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    T 1 Reply Last reply
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    • Christian EhrlicherC Christian Ehrlicher

      @Thelonious said in (MySQL) qsqlmysql.dll doesn't get created.:

      So I should move my recently created qsqlmysql.dll into the same folder as my project executable?

      I never said this. I just think that C:\Qt\6.4.3\ is not the Qt you're using while running your executable. When you would have followed @jsulm's advise we would have known more.

      T Offline
      T Offline
      Thelonious
      wrote on last edited by Thelonious
      #17

      @Christian-Ehrlicher

      qt.core.plugin.factoryloader: looking at "C:/Qt/6.4.3/msvc2019_64/plugins/sqldrivers/qsqlmysql.dll"
      qt.core.plugin.loader: Found metadata in lib C:/Qt/6.4.3/msvc2019_64/plugins/sqldrivers/qsqlmysql.dll, metadata=
      {
          "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
          "MetaData": {
              "Keys": [
                  "QMYSQL",
                  "QMARIADB"
              ]
          },
          "archlevel": 0,
          "className": "QMYSQLDriverPlugin",
          "debug": false,
          "version": 394240
      }
      
      
      qt.core.plugin.factoryloader: "The plugin 'C:/Qt/6.4.3/msvc2019_64/plugins/sqldrivers/qsqlmysql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
               not a plugin
      
      Christian EhrlicherC 1 Reply Last reply
      0
      • T Thelonious

        @Christian-Ehrlicher

        qt.core.plugin.factoryloader: looking at "C:/Qt/6.4.3/msvc2019_64/plugins/sqldrivers/qsqlmysql.dll"
        qt.core.plugin.loader: Found metadata in lib C:/Qt/6.4.3/msvc2019_64/plugins/sqldrivers/qsqlmysql.dll, metadata=
        {
            "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
            "MetaData": {
                "Keys": [
                    "QMYSQL",
                    "QMARIADB"
                ]
            },
            "archlevel": 0,
            "className": "QMYSQLDriverPlugin",
            "debug": false,
            "version": 394240
        }
        
        
        qt.core.plugin.factoryloader: "The plugin 'C:/Qt/6.4.3/msvc2019_64/plugins/sqldrivers/qsqlmysql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
                 not a plugin
        
        Christian EhrlicherC Online
        Christian EhrlicherC Online
        Christian Ehrlicher
        Lifetime Qt Champion
        wrote on last edited by
        #18

        @Thelonious said in (MySQL) qsqlmysql.dll doesn't get created.:

        qt.core.plugin.factoryloader: "The plugin 'C:/Qt/6.4.3/msvc2019_64/plugins/sqldrivers/qsqlmysql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
        not a plugin

        So you only compiled the release plugin but running a debug app.

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        • Christian EhrlicherC Christian Ehrlicher

          @Thelonious said in (MySQL) qsqlmysql.dll doesn't get created.:

          qt.core.plugin.factoryloader: "The plugin 'C:/Qt/6.4.3/msvc2019_64/plugins/sqldrivers/qsqlmysql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
          not a plugin

          So you only compiled the release plugin but running a debug app.

          T Offline
          T Offline
          Thelonious
          wrote on last edited by
          #19

          @Christian-Ehrlicher
          I apologize; the QT help article on building MySQL drivers doesn't specify how to make a debug version. Can you please point me somewhere that explains the difference or shows me hot to make the debug plugin?

          Christian EhrlicherC 1 Reply Last reply
          0
          • T Thelonious

            @Christian-Ehrlicher
            I apologize; the QT help article on building MySQL drivers doesn't specify how to make a debug version. Can you please point me somewhere that explains the difference or shows me hot to make the debug plugin?

            Christian EhrlicherC Online
            Christian EhrlicherC Online
            Christian Ehrlicher
            Lifetime Qt Champion
            wrote on last edited by Christian Ehrlicher
            #20

            Either open the generated solution and build the debug version (can also be done from the command line but I don't remember the commands) or use -G Ninja or -G NMake Makefiles for the cmake generator - they both produce rules to create both plugins directly. Maybe we should add this to the documentation. MSBuild is not meant to be run on the command line and therefore has a lot of strange switches...

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            T 2 Replies Last reply
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            • Christian EhrlicherC Christian Ehrlicher

              Either open the generated solution and build the debug version (can also be done from the command line but I don't remember the commands) or use -G Ninja or -G NMake Makefiles for the cmake generator - they both produce rules to create both plugins directly. Maybe we should add this to the documentation. MSBuild is not meant to be run on the command line and therefore has a lot of strange switches...

              T Offline
              T Offline
              Thelonious
              wrote on last edited by
              #21

              @Christian-Ehrlicher
              Interestingly enough after I run qt-cmake the only solution file I get is QSQLiteDriverPlugin.sln. Seems like a lot of people are having problems building the new driver.

              How would I got about installing ninja for use with cmake? I downloaded CMake separately.

              -Thanks

              Christian EhrlicherC 1 Reply Last reply
              0
              • T Thelonious

                @Christian-Ehrlicher
                Interestingly enough after I run qt-cmake the only solution file I get is QSQLiteDriverPlugin.sln. Seems like a lot of people are having problems building the new driver.

                How would I got about installing ninja for use with cmake? I downloaded CMake separately.

                -Thanks

                Christian EhrlicherC Online
                Christian EhrlicherC Online
                Christian Ehrlicher
                Lifetime Qt Champion
                wrote on last edited by
                #22

                @Thelonious said in (MySQL) qsqlmysql.dll doesn't get created.:

                How would I got about installing ninja for use with cmake? I downloaded CMake separately.

                If you want to use ninja, download it and put it in your PATH

                Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                Visit the Qt Academy at https://academy.qt.io/catalog

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                • Christian EhrlicherC Christian Ehrlicher

                  @Thelonious said in (MySQL) qsqlmysql.dll doesn't get created.:

                  How would I got about installing ninja for use with cmake? I downloaded CMake separately.

                  If you want to use ninja, download it and put it in your PATH

                  T Offline
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                  Thelonious
                  wrote on last edited by
                  #23

                  @Christian-Ehrlicher
                  Done and done.

                  Running the qt-cmake -G Ninja <arguments> is returning

                  -- The CXX compiler identification is unknown
                  -- The C compiler identification is unknown
                  -- The ASM compiler identification is unknown
                  -- Didn't find assembler
                  CMake Error at CMakeLists.txt:7 (project):
                    No CMAKE_CXX_COMPILER could be found.
                  
                    Tell CMake where to find the compiler by setting either the environment
                    variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
                    to the compiler, or to the compiler name if it is in the PATH.
                  

                  Taking a look at my CMakeList.txt at ...\sqldrivers and can't find the CMAKE_CXX_COMPILER entry. I assume I need to set it to
                  C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.35.32215\bin\Hostx64\x64\cl.exe

                  Christian EhrlicherC 1 Reply Last reply
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                  • T Thelonious

                    @Christian-Ehrlicher
                    Done and done.

                    Running the qt-cmake -G Ninja <arguments> is returning

                    -- The CXX compiler identification is unknown
                    -- The C compiler identification is unknown
                    -- The ASM compiler identification is unknown
                    -- Didn't find assembler
                    CMake Error at CMakeLists.txt:7 (project):
                      No CMAKE_CXX_COMPILER could be found.
                    
                      Tell CMake where to find the compiler by setting either the environment
                      variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
                      to the compiler, or to the compiler name if it is in the PATH.
                    

                    Taking a look at my CMakeList.txt at ...\sqldrivers and can't find the CMAKE_CXX_COMPILER entry. I assume I need to set it to
                    C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.35.32215\bin\Hostx64\x64\cl.exe

                    Christian EhrlicherC Online
                    Christian EhrlicherC Online
                    Christian Ehrlicher
                    Lifetime Qt Champion
                    wrote on last edited by
                    #24

                    @Thelonious You don't need it to set to anything. You have to make sure that the msvc environment is properly set up the same way you did it in your previous attempts.

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                    • Christian EhrlicherC Christian Ehrlicher

                      @Thelonious You don't need it to set to anything. You have to make sure that the msvc environment is properly set up the same way you did it in your previous attempts.

                      T Offline
                      T Offline
                      Thelonious
                      wrote on last edited by
                      #25

                      @Christian-Ehrlicher

                      Still getting the same error.

                      I might have to use SQLite while I build my code and come back to this. Something about my environment is just not right and the QT help article on building MySQL drivers seems to be missing a lot of explanations and is giving examples for a specific and out-of-date MySQL environment. The help article doesn't specify what directory any of these commands should be run from.

                      Christian EhrlicherC 1 Reply Last reply
                      0
                      • T Thelonious

                        @Christian-Ehrlicher

                        Still getting the same error.

                        I might have to use SQLite while I build my code and come back to this. Something about my environment is just not right and the QT help article on building MySQL drivers seems to be missing a lot of explanations and is giving examples for a specific and out-of-date MySQL environment. The help article doesn't specify what directory any of these commands should be run from.

                        Christian EhrlicherC Online
                        Christian EhrlicherC Online
                        Christian Ehrlicher
                        Lifetime Qt Champion
                        wrote on last edited by
                        #26

                        Since you managed to set up your compiler environment before and no no longer I don't know what you're doing wrong. Call the correct vsvars batch file to set up your msvc compiler...

                        Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                        Visit the Qt Academy at https://academy.qt.io/catalog

                        T 1 Reply Last reply
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                        • Christian EhrlicherC Christian Ehrlicher

                          Since you managed to set up your compiler environment before and no no longer I don't know what you're doing wrong. Call the correct vsvars batch file to set up your msvc compiler...

                          T Offline
                          T Offline
                          Thelonious
                          wrote on last edited by
                          #27

                          @Christian-Ehrlicher

                          The difference is I'm having to add

                          -G Ninja
                          

                          to qt-cmake.

                          I can make the plugins without it but when it comes time to --build the driver I get

                          MSBuild version 17.5.1+f6fdcf537 for .NET Framework
                          
                            Automatic MOC for target QMYSQLDriverPlugin
                          cl : command line  error D8016: '/O2' and '/RTC1' command-line options are incompatible [C:\Qt\6.4.3\msvc2019_64\bin\my
                          sql\QMYSQLDriverPlugin.vcxproj]
                            Automatic MOC for target QODBCDriverPlugin
                          cl : command line  error D8016: '/O2' and '/RTC1' command-line options are incompatible [C:\Qt\6.4.3\msvc2019_64\bin\od
                          bc\QODBCDriverPlugin.vcxproj]
                            Automatic MOC for target QSQLiteDriverPlugin
                          cl : command line  error D8016: '/O2' and '/RTC1' command-line options are incompatible [C:\Qt\6.4.3\msvc2019_64\bin\sq
                          lite\QSQLiteDriverPlugin.vcxproj]
                          
                          SGaistS 1 Reply Last reply
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                          • T Thelonious

                            @Christian-Ehrlicher

                            The difference is I'm having to add

                            -G Ninja
                            

                            to qt-cmake.

                            I can make the plugins without it but when it comes time to --build the driver I get

                            MSBuild version 17.5.1+f6fdcf537 for .NET Framework
                            
                              Automatic MOC for target QMYSQLDriverPlugin
                            cl : command line  error D8016: '/O2' and '/RTC1' command-line options are incompatible [C:\Qt\6.4.3\msvc2019_64\bin\my
                            sql\QMYSQLDriverPlugin.vcxproj]
                              Automatic MOC for target QODBCDriverPlugin
                            cl : command line  error D8016: '/O2' and '/RTC1' command-line options are incompatible [C:\Qt\6.4.3\msvc2019_64\bin\od
                            bc\QODBCDriverPlugin.vcxproj]
                              Automatic MOC for target QSQLiteDriverPlugin
                            cl : command line  error D8016: '/O2' and '/RTC1' command-line options are incompatible [C:\Qt\6.4.3\msvc2019_64\bin\sq
                            lite\QSQLiteDriverPlugin.vcxproj]
                            
                            SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #28

                            Your system is unclean, there's no reason for the projects to be in the bin folder of your Qt installation.

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                            • SGaistS SGaist

                              Your system is unclean, there's no reason for the projects to be in the bin folder of your Qt installation.

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                              Thelonious
                              wrote on last edited by Thelonious
                              #29

                              @SGaist qt-cmake resides in the bin folder. Everything i'm creating/building is in an adjacent "build-sqldrivers" folder at

                              C:\Qt\6.4.3\msvc2019_64\
                              
                              SGaistS 1 Reply Last reply
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                              • T Thelonious

                                @SGaist qt-cmake resides in the bin folder. Everything i'm creating/building is in an adjacent "build-sqldrivers" folder at

                                C:\Qt\6.4.3\msvc2019_64\
                                
                                SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by
                                #30

                                You really should stay out of the source and the installation folders.

                                Interested in AI ? www.idiap.ch
                                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                • SGaistS SGaist

                                  You really should stay out of the source and the installation folders.

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                                  Thelonious
                                  wrote on last edited by
                                  #31

                                  @SGaist The help article at https://doc.qt.io/qt-6/sql-driver.html literally shows the driver building directory as bin.

                                  Pulled directly from the article

                                  C:\Qt\6.0.0\mingw81_64\bin\qt-cmake -G Ninja C:\Qt\6.0.0\Src\qtbase\src\plugins\sqldrivers -DMySQL_INCLUDE_DIR="C:\mysql-8.0.22-winx64\include" -DMySQL_LIBRARY="C:\mysql-8.0.22-winx64\lib\libmysql.lib" -DCMAKE_INSTALL_PREFIX="C:\Qt\6.0.0\mingw81_64"
                                  Configure summary:
                                  
                                  Qt Sql Drivers:
                                    DB2 (IBM) .............................. no
                                    InterBase .............................. no
                                    MySql .................................. yes
                                    OCI (Oracle) ........................... no
                                    ODBC ................................... yes
                                    PostgreSQL ............................. no
                                    SQLite ................................. yes
                                      Using system provided SQLite ......... no
                                  
                                  -- Configuring done
                                  -- Generating done
                                  -- Build files have been written to: C:/build-qt6-sqldrivers
                                  

                                  It feels as though MySQL has taken a tangent from QT support; it's clear they aren't working closely together. I can go ahead and write my program using SQLite and revisit this in the future because i'm all out of ideas.

                                  I really do appreciate all of yalls help though, there were a few moments when I thought I almost had it.

                                  SGaistS 1 Reply Last reply
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                                  • T Thelonious

                                    @SGaist The help article at https://doc.qt.io/qt-6/sql-driver.html literally shows the driver building directory as bin.

                                    Pulled directly from the article

                                    C:\Qt\6.0.0\mingw81_64\bin\qt-cmake -G Ninja C:\Qt\6.0.0\Src\qtbase\src\plugins\sqldrivers -DMySQL_INCLUDE_DIR="C:\mysql-8.0.22-winx64\include" -DMySQL_LIBRARY="C:\mysql-8.0.22-winx64\lib\libmysql.lib" -DCMAKE_INSTALL_PREFIX="C:\Qt\6.0.0\mingw81_64"
                                    Configure summary:
                                    
                                    Qt Sql Drivers:
                                      DB2 (IBM) .............................. no
                                      InterBase .............................. no
                                      MySql .................................. yes
                                      OCI (Oracle) ........................... no
                                      ODBC ................................... yes
                                      PostgreSQL ............................. no
                                      SQLite ................................. yes
                                        Using system provided SQLite ......... no
                                    
                                    -- Configuring done
                                    -- Generating done
                                    -- Build files have been written to: C:/build-qt6-sqldrivers
                                    

                                    It feels as though MySQL has taken a tangent from QT support; it's clear they aren't working closely together. I can go ahead and write my program using SQLite and revisit this in the future because i'm all out of ideas.

                                    I really do appreciate all of yalls help though, there were a few moments when I thought I almost had it.

                                    SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #32

                                    The last line is important: everything happens in ˋc:/build-qt6-sqldrivers`.

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                                    • SGaistS SGaist

                                      The last line is important: everything happens in ˋc:/build-qt6-sqldrivers`.

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                                      Thelonious
                                      wrote on last edited by
                                      #33

                                      @SGaist
                                      I'm going reinstall Qt and try again.

                                      I'll open up a cmd prompt
                                      C:\mysql
                                      and then invoke qt-cmake using it's path

                                      C:\Qt\6.4.3\msvc2019_64\bin\qt-cmake
                                      

                                      I'll let you know how it goes. Ninja won't install on my system, give some sort of error regarding Microsoft Store.

                                      SGaistS 1 Reply Last reply
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                                      • T Thelonious

                                        @SGaist
                                        I'm going reinstall Qt and try again.

                                        I'll open up a cmd prompt
                                        C:\mysql
                                        and then invoke qt-cmake using it's path

                                        C:\Qt\6.4.3\msvc2019_64\bin\qt-cmake
                                        

                                        I'll let you know how it goes. Ninja won't install on my system, give some sort of error regarding Microsoft Store.

                                        SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #34

                                        Are you installing it through the Qt installer ?

                                        Interested in AI ? www.idiap.ch
                                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                        • SGaistS SGaist

                                          Are you installing it through the Qt installer ?

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                                          Thelonious
                                          wrote on last edited by Thelonious
                                          #35

                                          @SGaist It is bundled with Qt in the C:\Qt\Tools\Ninja\ folder but I can't "install" it. I tried searching for an answer it seems that its blocked by Microsoft Defender or something else in my environment that I can't disable. Do you think the drivers can be built without it?

                                          BTW, i'm a linux guy at heart and I'm probably going to try to set my Ubuntu environment at home for this.

                                          SGaistS 1 Reply Last reply
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