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[SOLVED] gcc not recognized in QT after installation

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  • SGaistS SGaist

    Was ? Oo

    That's something pretty strange then…

    You can find it listed here

    Do you have a special install of Ubuntu Trusty ?

    In any case, you can also just call sudo apt-get install g++ but still it's puzzling

    D Offline
    D Offline
    developSomething
    wrote on last edited by
    #11

    @SGaist
    Now the compiler g++ is installed and working!
    Third hooray!

    But the first testproject build stops with the issue:
    cannot find -lGL

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    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #12

      That one has been covered many times in this forum: you are missing the OpenGL dev library

      sudo apt-get install libgl1-mesa-dev

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

      D 1 Reply Last reply
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      • SGaistS SGaist

        That one has been covered many times in this forum: you are missing the OpenGL dev library

        sudo apt-get install libgl1-mesa-dev

        D Offline
        D Offline
        developSomething
        wrote on last edited by
        #13

        @SGaist
        It is the same result as above
        Paketlisten werden gelesen... Fertig
        Abhängigkeitsbaum wird aufgebaut.
        Statusinformationen werden eingelesen.... Fertig
        E: Paket libgl1-mesa-dev kann nicht gefunden werden.

        I dont know if it has to do wih my Ubuntu 14.04LTS, i downloaded the official iso and made a dvd from it to install on my Lenovo PC
        so it should be a normal installation?!

        And a more general question: isn't there a more complete package for qt-installation? I mean this is really the hard way to get one error fixed after the other. One surprise follows the next.
        I mean without your help i wouldn't be able to get anything done within weeks?!

        K JKSHJ 2 Replies Last reply
        0
        • D developSomething

          @SGaist
          It is the same result as above
          Paketlisten werden gelesen... Fertig
          Abhängigkeitsbaum wird aufgebaut.
          Statusinformationen werden eingelesen.... Fertig
          E: Paket libgl1-mesa-dev kann nicht gefunden werden.

          I dont know if it has to do wih my Ubuntu 14.04LTS, i downloaded the official iso and made a dvd from it to install on my Lenovo PC
          so it should be a normal installation?!

          And a more general question: isn't there a more complete package for qt-installation? I mean this is really the hard way to get one error fixed after the other. One surprise follows the next.
          I mean without your help i wouldn't be able to get anything done within weeks?!

          K Offline
          K Offline
          koahnig
          wrote on last edited by
          #14

          @developSomething
          No, there no more complete packages available.
          You are struggling with the different components of your linux distro. They may be depend on each distro and have licenses. This cannot be easily distributed within one package. Unfortunately, it is the same as with windows.

          Vote the answer(s) that helped you to solve your issue(s)

          1 Reply Last reply
          0
          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #15

            One thing you can do that might help is to install the dev packages of Qt from Ubuntu's repository but at this point there seems to be strange things going on. Not finding build-essential is really not normal, what sources does apt use to retrieve the packages ?

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

            D 1 Reply Last reply
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            • SGaistS SGaist

              One thing you can do that might help is to install the dev packages of Qt from Ubuntu's repository but at this point there seems to be strange things going on. Not finding build-essential is really not normal, what sources does apt use to retrieve the packages ?

              D Offline
              D Offline
              developSomething
              wrote on last edited by
              #16

              this is what the terminal shows:

              x@x-ThinkCentre-A58:~$ apt
              apt 1.0.1ubuntu2 für i386, kompiliert am Oct 28 2014 20:57:14
              Usage: apt [options] command
              CLI for apt.
              Basic commands:
              list - list packages based on package names
              search - search in package descriptions
              show - show package details
              update - update list of available packages
              install - install packages
              remove - remove packages
              upgrade - upgrade the system by installing/upgrading packages
              full-upgrade - upgrade the system by removing/installing/upgrading packages
              edit-sources - edit the source information file

              1 Reply Last reply
              0
              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #17

                What does apt-cache search build-essential return ?

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

                1 Reply Last reply
                0
                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by SGaist
                  #18

                  Also, what do you have in /etc/apt/sources.list ?

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

                  D 1 Reply Last reply
                  0
                  • SGaistS SGaist

                    Also, what do you have in /etc/apt/sources.list ?

                    D Offline
                    D Offline
                    developSomething
                    wrote on last edited by JKSH
                    #19

                    @SGaist
                    What does apt-cache search build-essential return ?

                    It returns nothing.

                    and this is the content of /etc/apt/sources.list:

                    # deb cdrom:[Ubuntu 14.04.2 LTS _Trusty Tahr_ - Release i386 (20150218.1)]/ trusty main restricted
                    
                    # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
                    # newer versions of the distribution.
                    
                    ## Major bug fix updates produced after the final release of the
                    ## distribution.
                    
                    ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
                    ## team. Also, please note that software in universe WILL NOT receive any
                    ## review or updates from the Ubuntu security team.
                    
                    ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
                    ## team, and may not be under a free licence. Please satisfy yourself as to 
                    ## your rights to use the software. Also, please note that software in 
                    ## multiverse WILL NOT receive any review or updates from the Ubuntu
                    ## security team.
                    
                    ## N.B. software from this repository may not have been tested as
                    ## extensively as that contained in the main release, although it includes
                    ## newer versions of some applications which may provide useful features.
                    ## Also, please note that software in backports WILL NOT receive any review
                    ## or updates from the Ubuntu security team.
                    
                    
                    ## Uncomment the following two lines to add software from Canonical's
                    ## 'partner' repository.
                    ## This software is not part of Ubuntu, but is offered by Canonical and the
                    ## respective vendors as a service to Ubuntu users.
                    # deb http://archive.canonical.com/ubuntu trusty partner
                    # deb-src http://archive.canonical.com/ubuntu trusty partner
                    
                    ## This software is not part of Ubuntu, but is offered by third-party
                    ## developers who want to ship their latest software.
                    deb http://extras.ubuntu.com/ubuntu trusty main
                    deb http://archive.ubuntu.com/ubuntu trusty restricted
                    deb-src http://extras.ubuntu.com/ubuntu trusty main
                    
                    1 Reply Last reply
                    0
                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #20

                      Silly question but did you run apt-get updateafter you installed your system ?

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

                      1 Reply Last reply
                      0
                      • D Offline
                        D Offline
                        developSomething
                        wrote on last edited by tekojo
                        #21

                        Now that i have tried everything mentioned another idea came to my mind:

                        Could it be possible it is my IP which is disliked by ubuntu? therefor only offering certain packages, excluding dev?

                        (moderation comment: we don't think there is a global conspiracy on Ubuntu packages, and looks like the problem was solved below)

                        1 Reply Last reply
                        0
                        • D developSomething

                          @SGaist
                          It is the same result as above
                          Paketlisten werden gelesen... Fertig
                          Abhängigkeitsbaum wird aufgebaut.
                          Statusinformationen werden eingelesen.... Fertig
                          E: Paket libgl1-mesa-dev kann nicht gefunden werden.

                          I dont know if it has to do wih my Ubuntu 14.04LTS, i downloaded the official iso and made a dvd from it to install on my Lenovo PC
                          so it should be a normal installation?!

                          And a more general question: isn't there a more complete package for qt-installation? I mean this is really the hard way to get one error fixed after the other. One surprise follows the next.
                          I mean without your help i wouldn't be able to get anything done within weeks?!

                          JKSHJ Offline
                          JKSHJ Offline
                          JKSH
                          Moderators
                          wrote on last edited by
                          #22

                          Hi,

                          @developSomething said:

                          and this is the content of /etc/apt/sources.list:

                          I see that you don't have any official repositories available. See https://help.ubuntu.com/community/Repositories/Ubuntu to add them. (At the very least, you need the "Main" repository. I also suggest adding "Universe" and "Restricted" to make Ubuntu nicer to useable.)

                          Then, try downloading the packages again.

                          isn't there a more complete package for qt-installation? I mean this is really the hard way to get one error fixed after the other. One surprise follows the next.

                          I've been using Ubuntu as a secondary computer for many years now. All this while, the only things I've needed to do to develop with Qt on Ubuntu are:

                          1. Install Ubuntu
                          2. Install g++
                          3. Install OpenGL development libraries (Mesa)
                          4. Install Qt

                          You're having difficulties because your machine has been misconfigured somewhere. (Usually,some repositories are enabled by default as soon as you install Ubuntu.)

                          Maybe this is kind of a location-based-service, meaning, well...
                          In my neighborhood there are living a lot of people from all over the world, including many muslims.
                          Could it be possible it is my IP which is disliked by ubuntu? therefor only offering certain packages, excluding dev?

                          Given that Canonical wants Ubuntu to spread all over the world, I'd be very surprised if they did this. However, you could ask at https://askubuntu.com to verify.

                          Anyway, I don't see how Muslims are related to your issue.

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

                          D 1 Reply Last reply
                          1
                          • JKSHJ JKSH

                            Hi,

                            @developSomething said:

                            and this is the content of /etc/apt/sources.list:

                            I see that you don't have any official repositories available. See https://help.ubuntu.com/community/Repositories/Ubuntu to add them. (At the very least, you need the "Main" repository. I also suggest adding "Universe" and "Restricted" to make Ubuntu nicer to useable.)

                            Then, try downloading the packages again.

                            isn't there a more complete package for qt-installation? I mean this is really the hard way to get one error fixed after the other. One surprise follows the next.

                            I've been using Ubuntu as a secondary computer for many years now. All this while, the only things I've needed to do to develop with Qt on Ubuntu are:

                            1. Install Ubuntu
                            2. Install g++
                            3. Install OpenGL development libraries (Mesa)
                            4. Install Qt

                            You're having difficulties because your machine has been misconfigured somewhere. (Usually,some repositories are enabled by default as soon as you install Ubuntu.)

                            Maybe this is kind of a location-based-service, meaning, well...
                            In my neighborhood there are living a lot of people from all over the world, including many muslims.
                            Could it be possible it is my IP which is disliked by ubuntu? therefor only offering certain packages, excluding dev?

                            Given that Canonical wants Ubuntu to spread all over the world, I'd be very surprised if they did this. However, you could ask at https://askubuntu.com to verify.

                            Anyway, I don't see how Muslims are related to your issue.

                            D Offline
                            D Offline
                            developSomething
                            wrote on last edited by
                            #23

                            @JKSH
                            thanks to your little install guide now everything works fine!

                            all i had to do was remove the whole ubuntu installation and restart from scratch.

                            Surprisingly the repositories were all set up correctly by default, maybe it was because i have chosen the default US-english installation instead of the german one ..^^

                            I would even be willing to add SOLVED to the title of the thread
                            if only i knew how to?

                            K 1 Reply Last reply
                            0
                            • D developSomething

                              @JKSH
                              thanks to your little install guide now everything works fine!

                              all i had to do was remove the whole ubuntu installation and restart from scratch.

                              Surprisingly the repositories were all set up correctly by default, maybe it was because i have chosen the default US-english installation instead of the german one ..^^

                              I would even be willing to add SOLVED to the title of the thread
                              if only i knew how to?

                              K Offline
                              K Offline
                              koahnig
                              wrote on last edited by koahnig
                              #24

                              @developSomething
                              How to mark as solved?

                              Simply go to the first post where you started. Press the gear wheel on the very right and select the left (Edit) symbol.
                              Go to your title line. Add there [solved] in the beginning of line.

                              Vote the answer(s) that helped you to solve your issue(s)

                              1 Reply Last reply
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