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    Unsolved Building examples on Ubuntu with Qt-5.13.0

    Installation and Deployment
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    • G
      gibbogle last edited by

      @jsulm said in Building examples on Ubuntu with Qt-5.13.0:

      sudo apt-get install build-essential libgl1-mesa-dev

      Both are already the newest version.

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      • G
        gibbogle @jsulm last edited by

        @jsulm
        The kit has the compiler as: GCC (C++, x86 64bit in /usr/bin), and in /usr/bin I see gcc as a link to gcc-5.
        'gcc -v' shows

        Using built-in specs.
        COLLECT_GCC=gcc
        COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
        Target: x86_64-linux-gnu
        Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.4.0-6ubuntu1~16.04.11' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
        Thread model: posix
        gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.11)

        jsulm 1 Reply Last reply Reply Quote 0
        • jsulm
          jsulm Lifetime Qt Champion @gibbogle last edited by

          @gibbogle Please check your Kit: are there any warnings/errors?
          Is C++ compiler set as g++?

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

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          • G
            gibbogle @jsulm last edited by

            @jsulm
            I don't see any warnings or errors associated with Qt-5.13.0.
            How do I set gcc to g++?

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            • G
              gibbogle @jsulm last edited by

              @jsulm
              To better express this: in the list of Compilers I see just many versions of GCC and some of Clang.

              jsulm 1 Reply Last reply Reply Quote 0
              • jsulm
                jsulm Lifetime Qt Champion @gibbogle last edited by

                @gibbogle Can you show a screenshot of your Kit configuration?

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

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                • G
                  gibbogle @jsulm last edited by

                  @jsulm Before I try to find out how to that, perhaps there is a simple solution.
                  In Compilers, the Auto-detected list has two entries for GCC (C++, x86 64bit in /usr/bin) and two for GCC 5(C++, x86 64bit in /usr/bin). When I select these I see that the associated compiler paths are all to a version of g++:
                  /usr/bin/g++
                  /usr/bin/x86_64-linux-gnu-g++
                  /usr/bin/g++-5
                  /usr/bin/x86_64-linux-gnu-g++-5

                  I know that the kit is using GCC, not GCC 5, but there is no way to see which of the first two in the above list it corresponds to (g++ or x86_64-linux-gnu-g++).

                  Now I see that they all point to g++-5

                  gib@gigabyte:/usr/bin$ ls -al g++
                  lrwxrwxrwx 1 root root 5 May 20 2017 g++ -> g++-5
                  -rwxr-xr-x 1 root root 919832 Aug 28 2018 g++-5
                  lrwxrwxrwx 1 root root 5 May 20 2017 x86_64-linux-gnu-g++ -> g++-5
                  lrwxrwxrwx 1 root root 5 Aug 28 2018 x86_64-linux-gnu-g++-5 -> g++-5

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                  • G
                    gibbogle @jsulm last edited by

                    @jsulm I don't know how to get a screenshot in Linux.
                    The kit for Qt-5.13.0 is (default) has:
                    Compiler: GCC (C++, x86 64bit in /usr/bin)
                    Environment: No changes to apply.
                    Qt version: Qt 5.13.0 (gcc_64)

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                    • G
                      gibbogle @gibbogle last edited by gibbogle

                      @gibbogle
                      In fact (* got stripped in the copy-and-paste) I typed:
                      ls -al * g++ *
                      (without the spaces)

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                      • G
                        gibbogle @gibbogle last edited by

                        This post is deleted!
                        G 1 Reply Last reply Reply Quote 0
                        • G
                          gibbogle @gibbogle last edited by

                          This post is deleted!
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                          • G
                            gibbogle @jsulm last edited by

                            @jsulm I just reminded myself that the build does find and use g++, and makes the executable. I located it, and it runs OK. So the configure errors about g++ are perhaps not important, but there is still the problem with the missing directory tree.

                            Should I make a bug report?

                            jsulm 1 Reply Last reply Reply Quote 0
                            • jsulm
                              jsulm Lifetime Qt Champion @gibbogle last edited by jsulm

                              @gibbogle said in Building examples on Ubuntu with Qt-5.13.0:

                              missing directory tree

                              You mean in QtCreator? This is not a bug - if qmake fails the project structure will not be updated.
                              What happens if you call qmake in a terminal instead in QtCreator?

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

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                              • G
                                gibbogle @jsulm last edited by gibbogle

                                @jsulm But qmake doesn't fail when I do Build > Run qmake, and the build does succeed.
                                I've now found that if I build for the first time then close the project (no project tree), then reopen the project, I do get a project tree. You might not call this a bug, but it's definitely confusing and undesirable.

                                There is also the issue that after a successful build, clicking the green arrow to run the program gives the "Could not find the executable" popup. (I just discovered that on reopening the project - and seeing a project tree - the green arrow does execute the program.) It seems likely that all these issues stem from the same cause.

                                Yes, this is all within Qt Creator.

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