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Unable to build example projects due to CMake error

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  • J Offline
    J Offline
    jasoney
    wrote on last edited by
    #1

    I am trying out Qt for the first time. When I tried to build the coffee machine example, CMake gave this error, and I haven't been able to solve it.

    Running C:\cygwin64\bin\cmake.exe -S C:/Qt/Examples/Qt-6.5.1/demos/calqlatr -B C:/Qt/Examples/Qt-6.5.1/demos/build-calqlatr-Desktop_Qt_6_5_1_MinGW_64_bit-Debug in C:\Qt\Examples\Qt-6.5.1\demos\build-calqlatr-Desktop_Qt_6_5_1_MinGW_64_bit-Debug.
    -- The CXX compiler identification is unknown
    CMake Error at CMakeLists.txt:5 (project):
      The CMAKE_CXX_COMPILER:
    
        C:/Qt/Tools/mingw1120_64/bin/g++.exe
    
      is not a full path and was not found in the PATH.
    
      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.
    
    
    -- Configuring incomplete, errors occurred!
    CMake process exited with exit code 1.
    
    Christian EhrlicherC jsulmJ 2 Replies Last reply
    0
    • J jasoney

      @Christian-Ehrlicher I still get the same error

      Christian EhrlicherC Offline
      Christian EhrlicherC Offline
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote on last edited by
      #12

      @jasoney said in Unable to build example projects due to CMake error:

      I still get the same error

      Remove the build dir and run cmake again, if it still complains about it you still have a cygwin PATH somewhere - remove it.

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

      J 1 Reply Last reply
      1
      • J jasoney

        I am trying out Qt for the first time. When I tried to build the coffee machine example, CMake gave this error, and I haven't been able to solve it.

        Running C:\cygwin64\bin\cmake.exe -S C:/Qt/Examples/Qt-6.5.1/demos/calqlatr -B C:/Qt/Examples/Qt-6.5.1/demos/build-calqlatr-Desktop_Qt_6_5_1_MinGW_64_bit-Debug in C:\Qt\Examples\Qt-6.5.1\demos\build-calqlatr-Desktop_Qt_6_5_1_MinGW_64_bit-Debug.
        -- The CXX compiler identification is unknown
        CMake Error at CMakeLists.txt:5 (project):
          The CMAKE_CXX_COMPILER:
        
            C:/Qt/Tools/mingw1120_64/bin/g++.exe
        
          is not a full path and was not found in the PATH.
        
          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.
        
        
        -- Configuring incomplete, errors occurred!
        CMake process exited with exit code 1.
        
        Christian EhrlicherC Offline
        Christian EhrlicherC Offline
        Christian Ehrlicher
        Lifetime Qt Champion
        wrote on last edited by
        #2

        @jasoney said in Unable to build example projects due to CMake error:

        C:/Qt/Tools/mingw1120_64/bin/g++.exe

        So is this path correct?

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

        J 1 Reply Last reply
        0
        • Christian EhrlicherC Christian Ehrlicher

          @jasoney said in Unable to build example projects due to CMake error:

          C:/Qt/Tools/mingw1120_64/bin/g++.exe

          So is this path correct?

          J Offline
          J Offline
          jasoney
          wrote on last edited by
          #3

          @Christian-Ehrlicher Yes
          Screenshot 2023-07-12 085150.png

          Christian EhrlicherC 1 Reply Last reply
          0
          • J jasoney

            @Christian-Ehrlicher Yes
            Screenshot 2023-07-12 085150.png

            Christian EhrlicherC Offline
            Christian EhrlicherC Offline
            Christian Ehrlicher
            Lifetime Qt Champion
            wrote on last edited by
            #4

            What QtCreator version do you use?
            Can you open a command prompt and try to execute g++ (with full path and correct separators)?

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

            J 1 Reply Last reply
            0
            • Christian EhrlicherC Christian Ehrlicher

              What QtCreator version do you use?
              Can you open a command prompt and try to execute g++ (with full path and correct separators)?

              J Offline
              J Offline
              jasoney
              wrote on last edited by
              #5

              @Christian-Ehrlicher
              I am using QT Creator 10.0.2
              Running C:\Qt\Tools\mingw1120_64\bin\g++.exe --version:

              g++.exe (x86_64-posix-seh-rev3, Built by MinGW-W64 project) 11.2.0
              Copyright (C) 2021 Free Software Foundation, Inc.
              This is free software; see the source for copying conditions.  There is NO
              warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
              
              J 1 Reply Last reply
              0
              • J jasoney

                @Christian-Ehrlicher
                I am using QT Creator 10.0.2
                Running C:\Qt\Tools\mingw1120_64\bin\g++.exe --version:

                g++.exe (x86_64-posix-seh-rev3, Built by MinGW-W64 project) 11.2.0
                Copyright (C) 2021 Free Software Foundation, Inc.
                This is free software; see the source for copying conditions.  There is NO
                warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
                
                J Offline
                J Offline
                jasoney
                wrote on last edited by
                #6

                Update: QMake works.

                J 1 Reply Last reply
                0
                • J jasoney

                  Update: QMake works.

                  J Offline
                  J Offline
                  jasoney
                  wrote on last edited by
                  #7

                  I might just try reinstalling Qt.

                  1 Reply Last reply
                  0
                  • J jasoney

                    I am trying out Qt for the first time. When I tried to build the coffee machine example, CMake gave this error, and I haven't been able to solve it.

                    Running C:\cygwin64\bin\cmake.exe -S C:/Qt/Examples/Qt-6.5.1/demos/calqlatr -B C:/Qt/Examples/Qt-6.5.1/demos/build-calqlatr-Desktop_Qt_6_5_1_MinGW_64_bit-Debug in C:\Qt\Examples\Qt-6.5.1\demos\build-calqlatr-Desktop_Qt_6_5_1_MinGW_64_bit-Debug.
                    -- The CXX compiler identification is unknown
                    CMake Error at CMakeLists.txt:5 (project):
                      The CMAKE_CXX_COMPILER:
                    
                        C:/Qt/Tools/mingw1120_64/bin/g++.exe
                    
                      is not a full path and was not found in the PATH.
                    
                      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.
                    
                    
                    -- Configuring incomplete, errors occurred!
                    CMake process exited with exit code 1.
                    
                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #8

                    @jasoney said in Unable to build example projects due to CMake error:

                    C:\cygwin64\bin\cmake.exe

                    I'm not sure but can't you install CMake via Qt installer?

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

                    J 1 Reply Last reply
                    0
                    • jsulmJ jsulm

                      @jasoney said in Unable to build example projects due to CMake error:

                      C:\cygwin64\bin\cmake.exe

                      I'm not sure but can't you install CMake via Qt installer?

                      J Offline
                      J Offline
                      jasoney
                      wrote on last edited by
                      #9

                      Using the QT CMake installation gives me this error:

                      Running C:\Qt\Tools\CMake_64\bin\cmake.exe -S C:/Qt/Examples/Qt-6.5.1/demos/coffee -B C:/Qt/Examples/Qt-6.5.1/demos/build-coffee-Desktop_Qt_6_5_1_MinGW_64_bit-Debug in C:\Qt\Examples\Qt-6.5.1\demos\build-coffee-Desktop_Qt_6_5_1_MinGW_64_bit-Debug.
                      CMake Error at CMakeLists.txt:5 (project):
                        Running
                      
                         '/cygdrive/c/Qt/Tools/Ninja/ninja.exe' '--version'
                      
                        failed with:
                      
                         The system cannot find the file specified
                      
                      Christian EhrlicherC 1 Reply Last reply
                      0
                      • J jasoney

                        Using the QT CMake installation gives me this error:

                        Running C:\Qt\Tools\CMake_64\bin\cmake.exe -S C:/Qt/Examples/Qt-6.5.1/demos/coffee -B C:/Qt/Examples/Qt-6.5.1/demos/build-coffee-Desktop_Qt_6_5_1_MinGW_64_bit-Debug in C:\Qt\Examples\Qt-6.5.1\demos\build-coffee-Desktop_Qt_6_5_1_MinGW_64_bit-Debug.
                        CMake Error at CMakeLists.txt:5 (project):
                          Running
                        
                           '/cygdrive/c/Qt/Tools/Ninja/ninja.exe' '--version'
                        
                          failed with:
                        
                           The system cannot find the file specified
                        
                        Christian EhrlicherC Offline
                        Christian EhrlicherC Offline
                        Christian Ehrlicher
                        Lifetime Qt Champion
                        wrote on last edited by
                        #10

                        Remove all cygwin related stuff from your PATH env var.

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

                        J 1 Reply Last reply
                        1
                        • Christian EhrlicherC Christian Ehrlicher

                          Remove all cygwin related stuff from your PATH env var.

                          J Offline
                          J Offline
                          jasoney
                          wrote on last edited by
                          #11

                          @Christian-Ehrlicher I still get the same error

                          Christian EhrlicherC 1 Reply Last reply
                          0
                          • J jasoney

                            @Christian-Ehrlicher I still get the same error

                            Christian EhrlicherC Offline
                            Christian EhrlicherC Offline
                            Christian Ehrlicher
                            Lifetime Qt Champion
                            wrote on last edited by
                            #12

                            @jasoney said in Unable to build example projects due to CMake error:

                            I still get the same error

                            Remove the build dir and run cmake again, if it still complains about it you still have a cygwin PATH somewhere - remove it.

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

                            J 1 Reply Last reply
                            1
                            • Christian EhrlicherC Christian Ehrlicher

                              @jasoney said in Unable to build example projects due to CMake error:

                              I still get the same error

                              Remove the build dir and run cmake again, if it still complains about it you still have a cygwin PATH somewhere - remove it.

                              J Offline
                              J Offline
                              jasoney
                              wrote on last edited by
                              #13

                              @Christian-Ehrlicher Fixed it 👍 Thank you

                              1 Reply Last reply
                              1
                              • J jasoney has marked this topic as solved on

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