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Qt5 development primer

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  • A Offline
    A Offline
    arichardson
    wrote on last edited by
    #12

    It seems to work now with a clean checkout, however I get following compilation error:

    qsvgiconengine.cpp:47:26: fatal error: qsvgrenderer.h: File not found.
    compilation terminated.

    when compiling qtsvg.

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    • kkoehneK Offline
      kkoehneK Offline
      kkoehne
      Moderators
      wrote on last edited by
      #13

      Do you have a qsvgrenderer.h in qt5/qtsvg/include/QtSvG ? If not you can run "syncqt" in your qtsvg root directory.

      Director R&D, The Qt Company

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      • A Offline
        A Offline
        arichardson
        wrote on last edited by
        #14

        I did a new clean build and for some reason it worked now. Thank you for your help.

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        • J Offline
          J Offline
          jmfairlie
          wrote on last edited by
          #15

          On mac 10.6.8, I have problems building this. The linker complains about an nonexistent "OpenGl" library. After replacing with "OpenGL" (notice capital L) in the offending files* this issue resolves.
          Unfortunately QtQuick2.0 examples don't work. For some reason importing folders from QML files is not working as it should. qmlscene doesnt recognize the imported folders (despite the fact that they are there at the same level as the invoking qml file). I keep getting:

          .../somefile.qml: "SomeFolder": No such directory

          (*) among them:
          ./qtbase/src/platformsupport/cglconvenience/cglconvenience.pri: LIBS += -framework Cocoa -framework OpenGl

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          • kkoehneK Offline
            kkoehneK Offline
            kkoehne
            Moderators
            wrote on last edited by
            #16

            @jmfairlie: I'm not working on Mac OS X, sorry. You should raise your problems (after verifying that the problem is still there in latest master branch of e.g. qtbase) on IRC/freenode, #qt-labs channel . Or you raise it on qt5-feedback@qt.nokia.com .

            Director R&D, The Qt Company

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            • J Offline
              J Offline
              jmfairlie
              wrote on last edited by
              #17

              Now I tried with Ubuntu 11.04 with an ATI gpu (might be relevant) and linker isn't able to find GL libraries. Indeed, for some reason, there is no /usr/lib/libGL.so in my machine (not sure if this is normal) but only in /usr/lib/mesa and /usr/lib/fglrx.

              If I add "-opengl desktop" to configure then it shows the message:

              The OpenGL functionality test failed!
              You might need to modify the include and library search paths by editing
              QMAKE_INCDIR_OPENGL, QMAKE_LIBDIR_OPENGL and QMAKE_LIBS_OPENGL in
              .../qt5/qtbase/mkspecs/linux-g++.

              If I follow the suggestion and add those lines to qtbase/mkspecs/linux-g++/qmake.conf :

              QMAKE_LIBDIR_OPENGL = /usr/lib/fglrx
              QMAKE_INCDIR_OPENGL = /usr/include/GL
              QMAKE_LIBS_OPENGL = -lGL

              It doesn't make a difference and linker is still unable to find the GL libraries, (I guess those macros are not being used)

              However if I just add a symlink to any of the GL libs to /usr/lib it finally finds them.

              Unfortunately, QtQuick2.0 examples (what I'm interested in) don't work either, this time qmlscene SEGFAULTS in a seemingly unrelated call ... I guess I'll need to wait until a more stable version comes out.

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              • kkoehneK Offline
                kkoehneK Offline
                kkoehne
                Moderators
                wrote on last edited by
                #18

                Ubuntu 11.04 is used heavily in the development teams, so this should really work out of the box, without any environment variable tinkering. The libgl1-mesa-dev should include the /usr/lib/libGL.so file, try installing this package. (Btw, you can find out which package provides which file by using the "apt-get file search" command).

                For reference, this is the output "configure -nokia-developer -nomake examples -nomake demos -nomake tests" gives me on an Ubuntu 11.04:

                @
                Build type: linux-g++
                Architecture: i386
                Host architecture: i386
                Platform notes:

                        - Also available for Linux: linux-kcc linux-icc linux-cxx
                

                Build .................. libs
                Configuration .......... debug shared dll qpa largefile stl precompile_header mmx 3dnow sse sse2 sse3 ssse3 sse4_1 sse4_2 avx minimal-config small-config medium-config large-config full-config fontconfig xlib xcb-xlib phonon-backend accessibility opengl qpa reduce_exports clock-gettime clock-monotonic mremap getaddrinfo ipv6ifname getifaddrs inotify system-jpeg system-mng system-png png system-tiff system-freetype system-zlib nis cups glib gstreamer dbus openssl xcb alsa pulseaudio concurrent audio-backend svg v8 debug private_tests
                Debug .................. yes
                Qt 3 compatibility ..... no
                QtDBus module .......... yes (run-time)
                QtConcurrent code ...... yes
                QtGui module ........... yes
                QtScript module ........ yes
                QtScriptTools module ... yes
                QtXmlPatterns module ... yes
                Phonon module .......... yes
                Multimedia module ...... auto
                SVG module ............. yes
                WebKit module .......... yes
                JavaScriptCore JIT ..... To be decided by JavaScriptCore
                V8 module .............. yes
                Declarative module ..... yes
                Declarative debugging ...yes
                Location module ........ no
                Support for S60 ........ no
                Symbian DEF files ...... no
                STL support ............ yes
                PCH support ............ yes
                MMX/3DNOW/SSE/SSE2/SSE3. yes/yes/yes/yes/yes
                SSSE3/SSE4.1/SSE4.2..... yes/yes/yes
                AVX..................... yes
                IPv6 ifname support .... yes
                getaddrinfo support .... yes
                getifaddrs support ..... yes
                Accessibility .......... yes
                NIS support ............ yes
                CUPS support ........... yes
                Iconv support .......... no
                Glib support ........... yes
                GStreamer support ...... yes
                PulseAudio support ..... yes
                Large File support ..... yes
                GIF support ............ plugin
                TIFF support ........... plugin (system)
                JPEG support ........... plugin (system)
                PNG support ............ yes (system)
                MNG support ............ plugin (system)
                zlib support ........... system
                Session management ..... auto
                OpenGL support ......... yes (Desktop OpenGL)
                OpenVG support ......... no
                MySQL support .......... plugin
                SQLite support ......... plugin (qt)
                OpenSSL support ........ yes (run-time)
                Alsa support ........... yes
                ICD support ............ no
                libICU support ......... no
                Xcb support ............ limited (old version)
                @

                Director R&D, The Qt Company

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                • J Offline
                  J Offline
                  jmfairlie
                  wrote on last edited by
                  #19

                  this is what I got, I'll check on Monday if getting rid of the differences makes any difference:
                  @
                  --- a/jean
                  +++ b/kkoehne
                  -QtDBus module .......... no
                  +QtDBus module .......... yes (run-time)
                  -Phonon module .......... no
                  +Phonon module .......... yes
                  -CUPS support ........... no
                  +CUPS support ........... yes
                  -GStreamer support ...... no
                  -PulseAudio support ..... no
                  +GStreamer support ...... yes
                  +PulseAudio support ..... yes
                  -MNG support ............ plugin (qt)
                  +MNG support ............ plugin (system)
                  +MySQL support .......... plugin
                  -OpenSSL support ........ no
                  -Alsa support ........... no
                  +OpenSSL support ........ yes (run-time)
                  +Alsa support ........... yes
                  @

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                  • J Offline
                    J Offline
                    jmfairlie
                    wrote on last edited by
                    #20

                    pulled current latest version:

                    commit 0a0d66efceb64bcacffbf733053834829c657df7
                    Date: Wed Oct 19 07:38:37 2011 +1000

                    and this time qmlscene spit some more info after segfault:

                    "Cannot create platform GL context, none of GLX, EGL, DRI2 is enabled"

                    This message directed me to:
                    http://comments.gmane.org/gmane.comp.lib.qt.qml/3060

                    which suggests to install libx11-xcb-dev. Indeed I didn't have it, so I installed, cleaned and rebuilt, and now it works.

                    If this package is required for qtdeclarative to work properly shouldn't configure notice it and mention it somehow?
                    Anyhow, Just added this info to the wiki page.

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                    • Q Offline
                      Q Offline
                      qtd1d1
                      wrote on last edited by
                      #21

                      The installation was successful, but when I try to compile my own application I get the following error:
                      QDeclarativeView: No such file or directory

                      Just read the windows needs python for QDeclarative. What packages do I need for Linux (Ubuntu 10.04) ?

                      Does anyone had similar problems?

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                      • A Offline
                        A Offline
                        andreagrandi
                        wrote on last edited by
                        #22

                        After compiling Qt5 I'd like to do a safe "make install" in my system. With "safe" I mean that I don't want to overwtite my Qt4 libs on my system so they should be installed in (for example) /opt/qt5 if it's possible.

                        I also would like to start packaging Qt5 in a Ubuntu PPA, but even if I've a little experience with packaging, I really don't know how to split an installation in multiple packages (I mean: qt-multimedia, qt-database, qt-tools ecc.... just to make you an example): should I take example from the actual Qt4 packages available in Ubuntu? Anyone want to help me? Thanks!

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                        • Q Offline
                          Q Offline
                          qtd1d1
                          wrote on last edited by
                          #23

                          How do you force qtbase/src/plugins/platforms/xcb to recompile?

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                          0
                          • M Offline
                            M Offline
                            markc
                            wrote on last edited by
                            #24

                            I get this at every dir level I tried on Archlinux x86_64...
                            @~qt5-git/qtbase git submodule update --init src/3rdparty/v8
                            You need to run this command from the toplevel of the working tree.@
                            I already have a libv8 3.6.5.1 as part of my system so would it possible for qtbase and whatever else needs libv8 to just link against my system version?

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                            • L Offline
                              L Offline
                              ludde
                              wrote on last edited by
                              #25

                              Hi! Trying to build Qt 5 for the first time, but I'm not getting very far...
                              Seems like the init-repository script is not working properly with the the --http option. All the repos are cloned using "http:", except for the qt3d repo which still tries to use "git:".
                              Very simple problem, but with my total lack of experience with perl, I'm not sure how to work around it... If anyone could give me a hint on how to get past this, by fixing init-repository, or doing some manual step, it would be most appreciated.

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                              • M Offline
                                M Offline
                                markc
                                wrote on last edited by
                                #26

                                What is the best way to incorporate qtwebkit into a qt5 build?
                                @...
                                [pid 30835] open(".../qt5-git/.git/modules/qtwebkit/refs/heads/master", O_RDONLY) = -1 ENOENT (No such file or directory)
                                [pid 30835] write(2, "fatal: Oops\n", 12fatal: Oops@

                                @ludde, I'm not sure why there is not some plain English instructions to clone the repo exactly, or a bash script, rather than buried inside an obfuscated perl script that doesn't seem to work. An example .git/config file would be more useful.

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                                • L Offline
                                  L Offline
                                  ludde
                                  wrote on last edited by
                                  #27

                                  Managed to make init-repository clone all the modules (by fiddling a bit with the perl script, without really understanding what I was doing...).

                                  Also managed to run configure. But compiling (using Microsoft Visual Studio 2005, on Windows 7, 64 bit) eventually fails:

                                  @
                                  c:\users\ludde\qt\qt5\qtbase\src\plugins\platforms\windows\qtwindowsglobal.h(178) : error C2065: 'WM_XBUTTONDOWN' : undeclared identifier
                                  c:\users\ludde\qt\qt5\qtbase\src\plugins\platforms\windows\qtwindowsglobal.h(178) : error C2065: 'WM_XBUTTONDBLCLK' : undeclared identifier
                                  c:\users\ludde\qt\qt5\qtbase\src\plugins\platforms\windows\qwindowscontext.h(74) : error C2059: syntax error : '<L_TYPE_raw>'
                                  @

                                  Any ideas on what might be causing this?

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                                  • kkoehneK Offline
                                    kkoehneK Offline
                                    kkoehne
                                    Moderators
                                    wrote on last edited by
                                    #28

                                    @ludde: I filed https://bugreports.qt.nokia.com/browse/QTBUG-23580 regarding your problems with the -http option. About the windows problems ... don't know, it compiles for me :( I guess you're better off subscribing to qt-development@qt-project.org, and posting your problems there.

                                    Director R&D, The Qt Company

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                                    • O Offline
                                      O Offline
                                      oneWonders
                                      wrote on last edited by
                                      #29

                                      While running
                                      @./configure -developer-build -opensource -nomake examples -nomake tests@

                                      i get this error partway through:

                                      @Creating qmake. Please wait...
                                      g++ -c -o project.o -pipe -DQMAKE_OPENSOURCE_EDITION -g -g -I. -Igenerators -Igenerators/unix -Igenerators/win32 -Igenerators/mac -Igenerators/integrity -I/home/daniel/qt5/qtbase/include -I/home/daniel/qt5/qtbase/include/QtCore -I/home/daniel/qt5/qtbase/include/QtCore/5.0.0 -I/home/daniel/qt5/qtbase/include/QtCore/5.0.0/QtCore -I/home/daniel/qt5/qtbase/src/corelib/global -I/home/daniel/qt5/qtbase/src/corelib/xml -I/home/daniel/qt5/qtbase/tools/shared -DQT_NO_PCRE -DQT_BUILD_QMAKE -DQT_BOOTSTRAPPED -DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT_NO_COMPONENT -DQT_NO_STL -DQT_NO_COMPRESS -I/home/daniel/qt5/qtbase/mkspecs/linux-g++ -DHAVE_QCONFIG_CPP -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VARIANT -DQT_NO_DEPRECATED project.cpp
                                      make: g++: Command not found
                                      make: *** [project.o] Error 127
                                      @

                                      I am using ubuntu, does anyone know where i went wrong?
                                      Sorry i'm rather new to all this :$

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                                      • D Offline
                                        D Offline
                                        dangelog
                                        wrote on last edited by
                                        #30

                                        Do you have gcc installed...?

                                        Software Engineer
                                        KDAB (UK) Ltd., a KDAB Group company

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                                        • L Offline
                                          L Offline
                                          ludde
                                          wrote on last edited by
                                          #31

                                          Had this problem too. For some reason you need not only have gcc installed, but have it available as g++. This can be accomplished by installing the g++ package (and possibly also by just creating an alias from g++ to gcc, but I didn't try this).

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