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Qt5 development primer

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  • sierdzioS Offline
    sierdzioS Offline
    sierdzio
    Moderators
    wrote on last edited by
    #37

    Philius, I think it would be nice if you posted your findings to Qt development mailing list, where devs are likely to pick it up. And/ or modifying the "Building Qt5 from Git":http://developer.qt.nokia.com/wiki/Building_Qt_5_from_Git wiki page might be a good idea.

    (Z(:^

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    • P Offline
      P Offline
      Philius
      wrote on last edited by
      #38

      I re-subscribed and posted an email with a QtWebkit patch although my build still (eventually) fails.

      I think that as long as the install prefix is inside the source tree (not to mention the build path!) you're going to have problems, so I won't try it again at least until these things change.

      From trying to fix problems I noticed that there are several "Release" directories created in the source tree - it looks like someone was at least trying to do some whacky kind of out-of-source-while-still-in-source deal.

      Do a "find . -type d -name Release" once you've tried to build it at least once to see the strangeness.

      I also noticed that the build process was picking header files from the install path in preference to the source directory - I've got projects that use automake that don't do that (it's a shame automake can't do the same for libraries).

      Then there's "make install" trying to copy files over themselves.

      I'll stop here.

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      • A Offline
        A Offline
        angrymango
        wrote on last edited by
        #39

        On OSX I got stuck with a conflict of MacTypes.h

        "http://code.google.com/p/webkit-mirror/source/detail?r=a84882c321ecf749f61a855f1538aeaf938b2340":http://code.google.com/p/webkit-mirror/source/detail?r=a84882c321ecf749f61a855f1538aeaf938b2340

        Here are some links to patches that address some of the problems mentioned by Philius:

        "https://gist.github.com/1647614":https://gist.github.com/1647614
        "https://bug-76463-attachments.webkit.org/attachment.cgi?id=122778":https://bug-76463-attachments.webkit.org/attachment.cgi?id=122778

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        • P Offline
          P Offline
          Philius
          wrote on last edited by
          #40

          Those "QT += quick" are needed on Debian Wheezy because of
          @
          ld.bfd: "could not read symbols: Invalid operation" after indirect reference is unhelpful
          http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629498
          @

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          • A Offline
            A Offline
            angrymango
            wrote on last edited by
            #41

            I can confirm that all of changes mentioned by Philius are required to build on OSX.

            I also needed to add - "QT += quick" to the following files:

            ./qtwebkit/Source/WebKit/qt/declarative/public.pri
            ./qtwebkit/Source/WebKit/qt/declarative/experimental/experimental.pri
            ./qtwebkit/Source/WebKit2/UIProcess/API/qt/tests/tests.pri

            Philius - I think there are a few small mistakes in your earlier post which may be misleading to some - you say add "Qt += quick" which I believe should be "QT += quick" with upper case T

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            • P Offline
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              Philius
              wrote on last edited by
              #42

              Yep.
              While packaging my projects to get them into Debian I had my wrist slapped for referring to Qt as QT, which is QuickTime.
              It must have stuck in my head.
              They're spelled correctly in the patch, and anyway sometimes you have to append "quick" to the existing "QT =" or "QT +=" line.

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              • A Offline
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                angrymango
                wrote on last edited by
                #43

                Very true about appending it in some cases.

                I was wondering have you been testing qtwebkit at all? On OSX the build seems to be adding incorrect paths from the binaries to the dynamic libraries. I've fixed them up but MiniBrowser and QtTestBrowser are still not quite working properly yet. I'm going to look into it more later. I just wondered if the situation was looking any better on Linux? I'm going to try building on Ubuntu next.

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                • P Offline
                  P Offline
                  Philius
                  wrote on last edited by
                  #44

                  I just started a shadow build.
                  Here's the makefile (same dir as qt5).
                  @
                  all: config
                  cd qt5-build;
                  export PATH="${PATH}:$$(readlink -f qtbase/bin)";
                  make -j 2 && make install

                  config: #clean
                  mkdir -p qt5-build
                  mkdir -p qt5-install
                  cd qt5-build;
                  if test ! -f config.stamp; then
                  ../qt5/configure -prefix $$(readlink -f ../qt5-install) -no-wayland
                  -no-openvg -opengl es2 -opensource -confirm-license -v
                  -I /usr/include/gstreamer-0.10
                  -I /usr/include/glib-2.0
                  -I /usr/lib/x86_64-linux-gnu/glib-2.0/include
                  -I /usr/include/libxml2
                  2>&1 | tee make.txt;
                  touch config.stamp;
                  else
                  echo "Config target already done.";
                  fi

                  clean:
                  #cd qt5; git submodule foreach --recursive 'git clean -dfx'
                  rm -fr qt5-build
                  @

                  The includes are for gstreamer support.

                  It looks like OpenVG and Phonon aren't ready yet.
                  The error for them is "QMAKESPEC has not been set, so configuration cannot be deduced".

                  I'll report back when it's done.

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                  • P Offline
                    P Offline
                    Philius
                    wrote on last edited by
                    #45

                    It looks like the build system doesn't track configure changes - gstreamer seems to require phonon.

                    I'll "make clean" and "try" yet again.

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                    • P Offline
                      P Offline
                      Philius
                      wrote on last edited by
                      #46

                      Out of source builds definitely don't work, although this could change with new updates.

                      I'm not sure why the separate packages aren't "configure && make && make install" -able individually.
                      Maybe this is just to get them built quicker, but then they aren't really separate packages.

                      Also, providing text instructions that (currently) conflict with the README in git isn't helpful.
                      One of them should change.

                      Next, there should be a top-level "make" script which builds the tested configuration.
                      export "$ROOT" to the absolute path to the qt5 directory for the comments below.
                      I added
                      @export QMAKESPEC="linux-g++-64"@

                      otherwise svg and phonon modules fail.

                      I added
                      @-prefix ${ROOT}/qtbase@

                      otherwise qmake won't find qmodule.pri.

                      I added
                      @export PATH="${ROOT}/qtbase/bin:${PATH}"@

                      To use the binaries built in the build tree and not those installed on my system.

                      It still fails with the following error:
                      @
                      ../../../../Source/WebCore/platform/graphics/qt/GraphicsContext3DQt.cpp: In member function ‘void WebCore::GraphicsContext3DPrivate::blitMultisampleFramebuffer() const’:
                      ../../../../Source/WebCore/platform/graphics/qt/GraphicsContext3DQt.cpp:261:23: error: ‘GL_READ_FRAMEBUFFER_EXT’ was not declared in this scope
                      ../../../../Source/WebCore/platform/graphics/qt/GraphicsContext3DQt.cpp:262:23: error: ‘GL_DRAW_FRAMEBUFFER_EXT’ was not declared in this scope
                      make[6]: *** [obj/release-static/platform/graphics/qt/GraphicsContext3DQt.o] Error 1
                      @

                      GL_READ_FRAMEBUFFER_EXT is defined in GL/glext.h but not in OpenGL ES2, at least not in Wheezy amd64.

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                      • P Offline
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                        Philius
                        wrote on last edited by
                        #47

                        Sorry for editing my messages but the ground is moving under me.

                        I rebuilt with "regular" OpenGL and found one more problem:
                        qtwebkit-examples-and-demos/examples/browser/cookiejar.cpp is missing "#include <QNetworkCookie>".

                        I sent a message to development@qt-project.org so hopefully the patch (along with my patch for qtwebkit) should find their way into GIT soon.

                        Other than that, with the approach detailed in my previous post, the build succeeded.

                        It took about 4 hours with "make -j 2" on my dual core laptop with both cores running at 1.867 GHz.

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                        • W Offline
                          W Offline
                          werispaul
                          wrote on last edited by
                          #48

                          I had to use "-prefix CD\qtbase" option as described in the qt5 git readme file, to get through the configure step without errors. By not specifying the prefix, my mkspec (win32-msvc2010), was searched in "qtbase\bin" instead in "qtbase".

                          In addition i had to install python, because one of the compilation steps had an python call.

                          To init the QT Modules I used "git submodule init" and "git submodule update". Are there any magics behind the perl init-submodule script i'm missing (beside submodule selection and git user settings)?

                          Actually i'm trying to compile the current git master using Win 7 and VS2010 without success.

                          @ cl -c -FIqt_widgets_pch.h -Yuqt_widgets_pch.h -Fptmp\obj\debug_shared\QtWidgetsd_pch.pch -nologo -Zm200 -Zc:wchar_t -Zi -MDd -W3 -w34100 -w341
                          89 -MP -GR -EHsc -DQT_SHARED -DUNICODE -DWIN32 -DQT_LARGEFILE_SUPPORT -DQT_BUILD_WIDGETS_LIB -DQT_NO_USING_NAMESPACE -DQT_MAKEDLL -DQT_NO_CAST_TO_ASCI
                          I -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -D_USE_MATH_DEFINES -DQT_NO_STYLE_MAC -DQT_NO_STYLE_GTK -DQT_NO_STYLE_WINDOWSCE -DQ
                          T_NO_STYLE_WINDOWSMOBILE -DQ_INTERNAL_QAPP_SRC -DQT_NO_DIRECTWRITE -DQT_DLL -DQT_GUI_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_CORE_LIB -DQT_HAVE_MMX -DQT_H
                          AVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -I"....\include\QtCore" -I"....\include\QtCore\5.0.0" -I"....\include\QtCore\5.0.0\QtCore"
                          -I"....\include\QtGui\5.0.0" -I"....\include\QtGui\5.0.0\QtGui" -I"....\include\QtGui" -I"....\include" -I"....\include\QtWidgets\5.0.0" -I"....
                          \include\QtWidgets\5.0.0\QtWidgets" -I"....\include\QtWidgets" -I"....\include" -I"tmp\rcc\debug_shared" -I"tmp" -I"..\3rdparty\wintab" -I"dialogs"
                          -I"..\3rdparty\harfbuzz\src" -I"tmp\moc\debug_shared" -I"." -I"....\mkspecs\win32-msvc2010" -Fotmp\obj\debug_shared\ @C:\Users\vth\AppData\Local\Temp
                          \nmDEE9.tmp
                          qpushbutton.cpp
                          c:\qt\5.0\qtbase\include\qtwidgets\5.0.0\qtwidgets\private../../../../../src/widgets/dialogs/qdialog_p.h(61) : fatal error C1083: Datei (Include) kan
                          n nicht geöffnet werden: "QtGui/QPlatformDialogHelper": No such file or directory
                          NMAKE : fatal error U1077: ""c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\cl.EXE"": Rückgabe-Code "0x2"
                          Stop.
                          NMAKE : fatal error U1077: ""c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\nmake.exe"": Rückgabe-Code "0x2"
                          Stop.
                          NMAKE : fatal error U1077: "cd": Rückgabe-Code "0x2"
                          Stop.
                          NMAKE : fatal error U1077: "cd": Rückgabe-Code "0x2"
                          Stop.@

                          Is there a nightly build process for Qt5 or kind of branch which is stable in the meaning of: at least compilable?

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                          • R Offline
                            R Offline
                            RazrFalcon
                            wrote on last edited by
                            #49

                            Can't configure on ArchLinux x64

                            bq. No QPA platform plugin enabled!
                            If you really want to build without a QPA platform plugin you must pass
                            -no-xcb and -no-wayland to configure. Doing this will produce a Qt that
                            cannot run GUI applications.

                            But libxcb, mesa and gperf are installed.

                            Any suggestions?
                            Thanks.

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                            • D Offline
                              D Offline
                              dangelog
                              wrote on last edited by
                              #50

                              Add the option -verbose to configure to figure out which test is failing.

                              Be sure to install almost all xcb-related packages from your distribution, esp. the ones related to the various X extensions. Double check also their version.

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

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                              • R Offline
                                R Offline
                                RazrFalcon
                                wrote on last edited by
                                #51

                                Thanks. Verbose helped.

                                Here is my installed xcb-package list:
                                extra/libxcb
                                extra/xcb-proto
                                extra/xcb-util
                                extra/xcb-util-image
                                extra/xcb-util-keysyms
                                extra/xcb-util-renderutil
                                extra/xcb-util-wm

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                                • R Offline
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                                  RazrFalcon
                                  wrote on last edited by
                                  #52

                                  Hello again. I have a new error:

                                  @cd qtsvg/ && make -f Makefile
                                  make[1]: Entering directory /media/data/Additional/Sources/qt5/qtsvg' /media/data/Additional/Sources/qt5/qtbase/bin/qmake QMAKE_ABSOLUTE_SOURCE_PATH=/media/data/Additional/Sources/qt5/qtbase -o Makefile qtsvg.pro QMAKESPEC has not been set, so configuration cannot be deduced. Error processing project file: qtsvg.pro make[1]: *** [Makefile] Error 3 make[1]: Leaving directory /media/data/Additional/Sources/qt5/qtsvg'
                                  make: *** [module-qtsvg-make_default] Error 2@

                                  But all other moduls are build well. Error appears after hour of compilation, not at start.

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                                  • O Offline
                                    O Offline
                                    oneWonders
                                    wrote on last edited by
                                    #53

                                    Okay it was probably all broken before as i hadn't installed the right prerequisites (the ubuntu 11.10 prerequisite had not been added to the instructions).
                                    i.e.
                                    [code]on Ubuntu Oneiric:

                                    sudo apt-get install libxcb.* libglu1-mesa-dev[/code]
                                    

                                    as oppossed to:
                                    [code]on Ubuntu/Debian:

                                    sudo aptitude install ~nlibxcb.*
                                    

                                    [/code]

                                    I now get this error on compilation:
                                    [code]In file included from ../3rdparty/freetype/src/autofit/autofit.c:23:0:
                                    ../3rdparty/freetype/src/autofit/afhints.c: In function ‘af_glyph_hints_reload’:
                                    ../3rdparty/freetype/src/autofit/afhints.c:642:21: warning: variable ‘first’ set but not used [-Wunused-but-set-variable]
                                    g++ -c -include .pch/debug-shared/QtPlatformSupport -pipe -g -fvisibility=hidden -fvisibility-inlines-hidden -Wall -W -D_REENTRANT -fPIC -DQT_SHARED -DQT_NO_WAYLAND -DQT_NO_CORESERVICES -DQT_BUILD_PLATFORMSUPPORT_LIB -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_NO_CAST_FROM_ASCII -DQT_COMPILES_IN_HARFBUZZ -DQT_NO_FONTCONFIG -DFT2_BUILD_LIBRARY -DQT_COMPILES_IN_HARFBUZZ -DQT_GUI_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_CORE_LIB -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_HAVE_SSE3 -DQT_HAVE_SSSE3 -DQT_HAVE_SSE4_1 -DQT_HAVE_SSE4_2 -DQT_HAVE_AVX -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I../../mkspecs/linux-g++ -I. -I../../include/QtCore -I../../include/QtCore/5.0.0 -I../../include/QtCore/5.0.0/QtCore -I../../include/QtGui/5.0.0 -I../../include/QtGui/5.0.0/QtGui -I../../include/QtGui -I../../include -I../../include/QtPlatformSupport/5.0.0 -I../../include/QtPlatformSupport/5.0.0/QtPlatformSupport -I../../include/QtPlatformSupport -I../../include -I.rcc/debug-shared -I../3rdparty/harfbuzz/src -I../3rdparty/freetype/builds/unix -I../3rdparty/freetype/src -I../3rdparty/freetype/include -I/usr/X11R6/include -I.moc/debug-shared -o .obj/debug-shared/qglxconvenience.o glxconvenience/qglxconvenience.cpp
                                    glxconvenience/qglxconvenience.cpp:47:36: fatal error: X11/extensions/Xrender.h: No such file or directory
                                    compilation terminated.
                                    make[2]: *** [.obj/debug-shared/qglxconvenience.o] Error 1
                                    make[2]: *** Waiting for unfinished jobs....
                                    make[2]: Leaving directory /home/daniel/qt5/qtbase/src/platformsupport' make[1]: *** [sub-platformsupport-make_default-ordered] Error 2 make[1]: Leaving directory /home/daniel/qt5/qtbase'
                                    make: *** [module-qtbase-make_default] Error 2
                                    [/code]

                                    So i was trying to work out what i was missing in terms of dependencies. Considering i installed libglu1-mesa-dev i am not sure.

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                                      werispaul
                                      wrote on last edited by
                                      #54

                                      [quote author="werispaul" date="1328263852"]Actually i'm trying to compile the current git master using Win 7 and VS2010 without success.[/quote]
                                      Finally got it working. In between I've switched from Strawberry Perl to ActivePerl. I'm not sure if it was the crux, but an option to keep in mind (as well as the order of perl in the system PATH, saw the wiki note quite late).

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                                        Guest
                                        wrote on last edited by
                                        #55

                                        Let me join the ranks of people, for whom building Qt5 has failed.

                                        Using gcc 4.6.2 in Windows 7 x64 environment.

                                        The last console output before building failed (after spending 3 hours on it :( )

                                        bq. mingw32-make[3]: Leaving directory C:/Users/Dian/qt5/qtbase/src/widgets' mingw32-make[2]: Leaving directory C:/Users/Dian/qt5/qtbase/src/widgets'
                                        cd src\testlib\ && mingw32-make -f Makefile
                                        mingw32-make[2]: Entering directory C:/Users/Dian/qt5/qtbase/src/testlib' mingw32-make -f Makefile.Debug all mingw32-make[3]: Entering directory C:/Users/Dian/qt5/qtbase/src/testlib'
                                        g++ -c -fno-keep-inline-dllexport -g -Wall -frtti -fexceptions -mthreads -DQT_SH
                                        ARED -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_AS
                                        CII -DQTESTLIB_MAKEDLL -DQT_NO_DATASTREAM -DQT_MAKEDLL -DQT_ASCII_CAST_WARNINGS
                                        -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -D_USE_MATH_DEFINES -DQT_DLL -DQT_CORE_L
                                        IB -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -
                                        I"....\include\QtCore" -I"....\include" -I"." -I"....\include\QtTest\5.0.0" -
                                        I"....\include\QtTest\5.0.0\QtTest" -I"....\include\QtTest" -I"....\include"
                                        -I"tmp\rcc\debug_shared" -I"tmp" -I"tmp\moc\debug_shared" -I"....\mkspecs\win32
                                        -g++" -o tmp\obj\debug_shared\qtestcase.o qtestcase.cpp
                                        qtestcase.cpp:73:21: fatal error: crtdbg.h: No such file or directory
                                        compilation terminated.
                                        mingw32-make[3]: *** [tmp/obj/debug_shared/qtestcase.o] Error 1
                                        mingw32-make[3]: Leaving directory C:/Users/Dian/qt5/qtbase/src/testlib' mingw32-make[2]: *** [debug-all] Error 2 mingw32-make[2]: Leaving directory C:/Users/Dian/qt5/qtbase/src/testlib'
                                        mingw32-make[1]: *** [sub-testlib-make_default-ordered] Error 2
                                        mingw32-make[1]: Leaving directory `C:/Users/Dian/qt5/qtbase'
                                        mingw32-make: *** [module-qtbase-make_default] Error 2

                                        Any ideas?
                                        The missing file I actually do have on my PC, in:
                                        C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\crt\src\crtdbg.h
                                        But what does it have to do with anything, since I am using the GCC toolchain?

                                        Also, when I configured Qt I used "-nomake tests" - shouldn't that result in skipping qttest?

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                                        • H Offline
                                          H Offline
                                          Harry443
                                          wrote on last edited by
                                          #56

                                          Can someone provide a link for Qt 5 Download??

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