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Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler

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  • C cristian-adam
    12 Mar 2024, 20:15

    @kyrlon It could be that the path is too long for the MinGW GCC.

    At https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107974 I have a bugreport with a workaround to make gcc accept long paths:

    I've used the manifest tool from Visual C++ (mt.exe) to inject this manifest:

    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <!-- Copyright (c) Microsoft Corporation -->
    <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
    <application  xmlns="urn:schemas-microsoft-com:asm.v3">
        <windowsSettings xmlns:ws2="http://schemas.microsoft.com/SMI/2016/WindowsSettings">
            <ws2:longPathAware>true</ws2:longPathAware>
        </windowsSettings>
    </application>
    </assembly>
    

    with the command line:
    mt.exe -nologo -manifest "cc1plus.exe.manifest" -outputresource:"cc1plus.exe;#1"

    Ninja requires the same treatment, see https://github.com/ninja-build/ninja/pull/2225

    K Offline
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    kyrlon
    wrote on 13 Mar 2024, 17:24 last edited by
    #8

    @cristian-adam I am not too familiar with this. Do I run this in the minGW bin? I do not have a cc1plus.exe on my system.

    1 Reply Last reply
    0
    • K Offline
      K Offline
      kyrlon
      wrote on 13 Mar 2024, 20:05 last edited by kyrlon
      #9

      Attempt # 7 for building on windows

      Decided to use ninja that had fix in it, so I compiled from source on windows and replaced with new ninja in PATH

      1. Cleared out the build folder and ran the configure.bat like the following:
      PS C:\Users\kyrlon\Downloads\qt-everywhere-src-6.6.2\build> ..\configure.bat
      
      1. Ran the command cmake --build . --parallel
        Got another output fail due to missing header:
      C:/Users/kyrlon/Downloads/qt-everywhere-src-6.6.2/qtmultimedia/src/multimedia/windows/qwindowsmediadevices_p.h:19:10: fatal error: qplatformmediadevices_p.h: No such file or directory
         19 | #include <qplatformmediadevices_p.h>
            |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~
      compilation terminated.
      

      Attempt # 8 for building on windows [SUCCESS!!]

      Trying the suggestion by Christian Ehrlicher, and decided to build in the C:\ path directly, but this required a terminal with ADMIN priv.

      1. Cleared out the build folder and ran the configure.bat like the following:
      PS C:\qt6\build> ..\configure.bat
      
      1. Ran the command cmake --build . --parallel
        SUCCESS!
      2. Ran the command:
      PS C:\qt6\build> cmake --install .
      

      No issues and everything was installed.

      This attempt appears to be successful, but I'm not sure if trying to build from source every time from different machines would allow me to always have access to C:\.

      J 1 Reply Last reply 14 Mar 2024, 06:46
      0
      • K kyrlon
        13 Mar 2024, 20:05

        Attempt # 7 for building on windows

        Decided to use ninja that had fix in it, so I compiled from source on windows and replaced with new ninja in PATH

        1. Cleared out the build folder and ran the configure.bat like the following:
        PS C:\Users\kyrlon\Downloads\qt-everywhere-src-6.6.2\build> ..\configure.bat
        
        1. Ran the command cmake --build . --parallel
          Got another output fail due to missing header:
        C:/Users/kyrlon/Downloads/qt-everywhere-src-6.6.2/qtmultimedia/src/multimedia/windows/qwindowsmediadevices_p.h:19:10: fatal error: qplatformmediadevices_p.h: No such file or directory
           19 | #include <qplatformmediadevices_p.h>
              |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~
        compilation terminated.
        

        Attempt # 8 for building on windows [SUCCESS!!]

        Trying the suggestion by Christian Ehrlicher, and decided to build in the C:\ path directly, but this required a terminal with ADMIN priv.

        1. Cleared out the build folder and ran the configure.bat like the following:
        PS C:\qt6\build> ..\configure.bat
        
        1. Ran the command cmake --build . --parallel
          SUCCESS!
        2. Ran the command:
        PS C:\qt6\build> cmake --install .
        

        No issues and everything was installed.

        This attempt appears to be successful, but I'm not sure if trying to build from source every time from different machines would allow me to always have access to C:\.

        J Offline
        J Offline
        jsulm
        Lifetime Qt Champion
        wrote on 14 Mar 2024, 06:46 last edited by
        #10

        @kyrlon said in Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler:

        allow me to always have access to C:.

        You can also build in your user home folder like c:\users\USER_NAME\QT_BUILD_FOLDER

        https://forum.qt.io/topic/113070/qt-code-of-conduct

        K 2 Replies Last reply 14 Mar 2024, 21:56
        0
        • J jsulm
          14 Mar 2024, 06:46

          @kyrlon said in Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler:

          allow me to always have access to C:.

          You can also build in your user home folder like c:\users\USER_NAME\QT_BUILD_FOLDER

          K Offline
          K Offline
          kyrlon
          wrote on 14 Mar 2024, 21:56 last edited by
          #11

          @jsulm Good point. In general, I am aware that this is a Windows problem, but tampering with registry keys to disable the character path limit is not the ideal solution for different systems in use. Since I don't do much development on Windows, I was just wondering if this was a gcc or cmake limitation?

          J C 2 Replies Last reply 15 Mar 2024, 06:34
          0
          • K kyrlon
            14 Mar 2024, 21:56

            @jsulm Good point. In general, I am aware that this is a Windows problem, but tampering with registry keys to disable the character path limit is not the ideal solution for different systems in use. Since I don't do much development on Windows, I was just wondering if this was a gcc or cmake limitation?

            J Offline
            J Offline
            jsulm
            Lifetime Qt Champion
            wrote on 15 Mar 2024, 06:34 last edited by
            #12

            @kyrlon Too long paths is a Windows limitation

            https://forum.qt.io/topic/113070/qt-code-of-conduct

            C 1 Reply Last reply 15 Mar 2024, 08:41
            0
            • K kyrlon
              14 Mar 2024, 21:56

              @jsulm Good point. In general, I am aware that this is a Windows problem, but tampering with registry keys to disable the character path limit is not the ideal solution for different systems in use. Since I don't do much development on Windows, I was just wondering if this was a gcc or cmake limitation?

              C Online
              C Online
              Christian Ehrlicher
              Lifetime Qt Champion
              wrote on 15 Mar 2024, 06:38 last edited by
              #13

              @kyrlon said in Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler:

              Since I don't do much development on Windows, I was just wondering if this was a gcc or cmake limitation?

              Because the path is to long. Use a shorter source and build path and blame MS

              Already answered two days ago...

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

              1 Reply Last reply
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              • J jsulm
                15 Mar 2024, 06:34

                @kyrlon Too long paths is a Windows limitation

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                cristian-adam
                wrote on 15 Mar 2024, 08:41 last edited by
                #14

                @jsulm said in Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler:

                Too long paths is a Windows limitation

                Not quite. Windows has support for long paths (>255 characters) since Windows 10 version 1607 released on August 2015.

                But the applications need to opt-in in order to use the new functionality.

                It's a tooling problem:

                • Ninja - Is fixed but waiting for an official release (1.12)
                • GCC - Not fixed.
                • Visual C++ - Not fixed.
                • moc - Fixed since Qt 6.5.
                • make - Not fixed, but forgot to open a bug report.
                • clang - Works out of the box.
                • cmake - Works out of the box.

                So on Windows if you take llvm-mingw and a patched ninja you would be able to compile with clang and Qt 6.5+ just fine.

                J K 2 Replies Last reply 15 Mar 2024, 09:21
                3
                • C cristian-adam
                  15 Mar 2024, 08:41

                  @jsulm said in Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler:

                  Too long paths is a Windows limitation

                  Not quite. Windows has support for long paths (>255 characters) since Windows 10 version 1607 released on August 2015.

                  But the applications need to opt-in in order to use the new functionality.

                  It's a tooling problem:

                  • Ninja - Is fixed but waiting for an official release (1.12)
                  • GCC - Not fixed.
                  • Visual C++ - Not fixed.
                  • moc - Fixed since Qt 6.5.
                  • make - Not fixed, but forgot to open a bug report.
                  • clang - Works out of the box.
                  • cmake - Works out of the box.

                  So on Windows if you take llvm-mingw and a patched ninja you would be able to compile with clang and Qt 6.5+ just fine.

                  J Offline
                  J Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on 15 Mar 2024, 09:21 last edited by
                  #15

                  @cristian-adam said in Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler:

                  But the applications need to opt-in in order to use the new functionality

                  Well, yes. But you can also see it as on OS problem if user has to do something special just to be able to use long paths. And I think this is a system wide setting and not per-application.

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  1 Reply Last reply
                  0
                  • C cristian-adam
                    15 Mar 2024, 08:41

                    @jsulm said in Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler:

                    Too long paths is a Windows limitation

                    Not quite. Windows has support for long paths (>255 characters) since Windows 10 version 1607 released on August 2015.

                    But the applications need to opt-in in order to use the new functionality.

                    It's a tooling problem:

                    • Ninja - Is fixed but waiting for an official release (1.12)
                    • GCC - Not fixed.
                    • Visual C++ - Not fixed.
                    • moc - Fixed since Qt 6.5.
                    • make - Not fixed, but forgot to open a bug report.
                    • clang - Works out of the box.
                    • cmake - Works out of the box.

                    So on Windows if you take llvm-mingw and a patched ninja you would be able to compile with clang and Qt 6.5+ just fine.

                    K Offline
                    K Offline
                    kyrlon
                    wrote on 15 Mar 2024, 17:53 last edited by
                    #16

                    @cristian-adam

                    Attempt # 9 for building on windows

                    Tried your suggestion, but got the same error of missing file of qplatformmediadevices_p.h

                    1. Cleared out the build folder and ran the configure.bat like the following:
                    PS C:\qt6\build> ..\configure.bat
                    
                    1. Ran the command cmake --build . --parallel

                    Buikld stop with missing header file: https://pastebin.com/AZ7zDM2d

                    I used the version of llvm-mingw:

                    version of ninja used:

                    PS C:\Users\kyrlon\Downloads\qt-everywhere-src-6.6.2\build> ninja --version
                    1.12.0.git
                    
                    C 1 Reply Last reply 17 Mar 2024, 13:45
                    1
                    • J jsulm
                      14 Mar 2024, 06:46

                      @kyrlon said in Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler:

                      allow me to always have access to C:.

                      You can also build in your user home folder like c:\users\USER_NAME\QT_BUILD_FOLDER

                      K Offline
                      K Offline
                      kyrlon
                      wrote on 16 Mar 2024, 15:37 last edited by
                      #17

                      @jsulm said in Failing to build Qt 6.6.2 from source on Windows 10 with MinGW64 compiler:

                      You can also build in your user home folder like c:\users\USER_NAME\QT_BUILD_FOLDER

                      Another alternative is to use a virtual drive using the subst command. I might make this attempt later.

                      1 Reply Last reply
                      0
                      • K kyrlon
                        15 Mar 2024, 17:53

                        @cristian-adam

                        Attempt # 9 for building on windows

                        Tried your suggestion, but got the same error of missing file of qplatformmediadevices_p.h

                        1. Cleared out the build folder and ran the configure.bat like the following:
                        PS C:\qt6\build> ..\configure.bat
                        
                        1. Ran the command cmake --build . --parallel

                        Buikld stop with missing header file: https://pastebin.com/AZ7zDM2d

                        I used the version of llvm-mingw:

                        version of ninja used:

                        PS C:\Users\kyrlon\Downloads\qt-everywhere-src-6.6.2\build> ninja --version
                        1.12.0.git
                        
                        C Offline
                        C Offline
                        cristian-adam
                        wrote on 17 Mar 2024, 13:45 last edited by
                        #18

                        @kyrlon thank you for trying out llvm-mingw.

                        I'll have a look at this since from my point of view all of the tools should allow for long paths.

                        1 Reply Last reply
                        0
                        • K Offline
                          K Offline
                          kyrlon
                          wrote on 3 Apr 2024, 04:22 last edited by
                          #19

                          Attempt # 10 for building on windows [SUCCESS!!]

                          Started from scratch by re-downloading the source and used the subst command to make a new path to build with.

                          1. Created a virtual drive to avoid the PATH length limit:
                          subst a: .\qt-everywhere-src-6.6.2\
                          
                          1. created the build folder and ran the configure.bat like the following:
                          PS a:\build> ..\configure.bat
                          
                          1. Ran the command cmake --build . --parallel

                          2. Ran the install command afterwards

                          PS a:\build> cmake --build . --parallel
                          

                          No issues and everything was installed.

                          1 Reply Last reply
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                          • CesarC Cesar referenced this topic on 16 May 2024, 20:41

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