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Qt5 development primer

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  • P Offline
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    pierrevr
    wrote on 1 Mar 2012, 10:29 last edited by
    #66

    @Yuchen: Thanks for the tip on installing qtbase first. It works, but I don't understand why this is necessary. I am cross-compiling for a target system that has a completely different hierarchy, I don't consider it normal to have to install on the build system in this case. I ended up using a symlink on my dev system to, pointing to somewhere acceptable, installed with INSTALL_ROOT=/<path>, but I think this is a bug.

    As for the Windows question, I wouldn't know sorry, I develop on Linux.

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    • H Offline
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      hmuelner
      wrote on 7 Mar 2012, 12:08 last edited by
      #67

      Re: building QWebkit on Windows:
      The reason for the build failure are the following lines in qtwebkit/Source/WTF/WTF.pri:
      @ contains(QT_CONFIG,icu) {
      LIBS += -licui18n -licuuc -licudata
      } else {
      error("To build QtWebKit with Qt 5 you need ICU")
      }
      @

      I could not find a way to include icu in QT_CONFIG, but a brute force approach (for testing purposes) would be to remove the contains query and include the 3 icu libraries unconditionally.

      Helmut Mülner

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        pierrevr
        wrote on 7 Mar 2012, 12:50 last edited by
        #68

        hmuelner: That is a different problem, I believe. As stated in "Building_Qt_5_from_Git":http://developer.qt.nokia.com/wiki/Building_Qt_5_from_Git :

        WebKit doesn’t compile, missing ICU

        Currently there is no configure time check for ICU, so install it through the package manager through
        on Ubuntu/Debian:

        sudo apt-get install libicu-dev
        

        on Fedora:

        yum search ICU
        

        Alternatively you can also compile Qt without webkit by deleting / renaming the qtwebkit, qtwebkit-examples-and-demos directories. The -no-webkit option of configure does not work yet : https://bugreports.qt-project.org/browse/QTBUG-20577

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          hmuelner
          wrote on 7 Mar 2012, 12:53 last edited by
          #69

          @pierrevr: I am talking about building Webkit on Windows - no package manager there.

          Helmut Mülner

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            Kondr
            wrote on 7 Mar 2012, 15:21 last edited by
            #70

            Hello, I have tried to compile Qt5 under archlinux and under mac os, but in both cases I have got the same errors:

            bq.
            cd qtsvg/ && make -f Makefile
            cd qtphonon/ && make -f Makefile
            cd qtxmlpatterns/ && make -f Makefile
            make[1]: Entering directory /home/kondr/Documents/qt5/qtxmlpatterns' /home/kondr/Documents/qt5/qtbase/bin/qmake QMAKE_ABSOLUTE_SOURCE_PATH=/home/kondr/Documents/qt5/qtbase -o Makefile qtxmlpatterns.pro Could not find mkspecs for your QMAKESPEC&#40;default&#41; after trying: /home/kondr/Documents/qt5/qtxmlpatterns/mkspecs /home/kondr/Documents/qt5/qt5/mkspecs make&#91;1&#93;: *** [Makefile] Error 3 make&#91;1&#93;: Leaving directory /home/kondr/Documents/qt5/qtxmlpatterns'
            make: *** [module-qtxmlpatterns-make_default] Error 2
            make: *** Waiting for unfinished jobs....
            make[1]: Entering directory /home/kondr/Documents/qt5/qtsvg' /home/kondr/Documents/qt5/qtbase/bin/qmake QMAKE_ABSOLUTE_SOURCE_PATH=/home/kondr/Documents/qt5/qtbase -o Makefile qtsvg.pro Could not find mkspecs for your QMAKESPEC&#40;default&#41; after trying: /home/kondr/Documents/qt5/qtsvg/mkspecs /home/kondr/Documents/qt5/qt5/mkspecs make&#91;1&#93;: *** [Makefile] Error 3 make&#91;1&#93;: Leaving directory /home/kondr/Documents/qt5/qtsvg'
            make: *** [module-qtsvg-make_default] Error 2
            make[1]: Entering directory /home/kondr/Documents/qt5/qtphonon' /home/kondr/Documents/qt5/qtbase/bin/qmake QMAKE_ABSOLUTE_SOURCE_PATH=/home/kondr/Documents/qt5/qtbase -o Makefile qtphonon.pro Could not find mkspecs for your QMAKESPEC&#40;default&#41; after trying: /home/kondr/Documents/qt5/qtphonon/mkspecs /home/kondr/Documents/qt5/qt5/mkspecs make&#91;1&#93;: *** [Makefile] Error 3 make&#91;1&#93;: Leaving directory /home/kondr/Documents/qt5/qtphonon'
            make: *** [module-qtphonon-make_default] Error 2

            I have used the next command:

            bq. git clone git://gitorious.org/qt/qt5.git qt5 && cd qt5 && perl init-repository && export PATH="$PWD/qtbase/bin:$PATH" && ./configure -prefix $PWD/qt5 -opensource -confirm-license -nomake tests -nomake examples && make -j3

            In addition I would like to know how to compile Qt 5 for a special arch? (for example, how to compile Qt 5 for i386 arch on x86_64 OS?)

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              hmuelner
              wrote on 8 Mar 2012, 13:05 last edited by
              #71

              I made some progress (but did not succeed) with compiling the current git version of qtwebkit with vs2010 in windows7(64):

              My Qt directory is in d:\Qt\qt5.

              • I created an additional system cpp directory in d:\cpp with an include and a lib subdirectory

              • I add two variables to my system environment: INCLUDE=d:\cpp\include and LIB=d:\cpp\lib and started a new Visual Studio Command Prompt.

              • I copied qedit.h from the Windows SDK 6.0A to d:\cpp\include

              • I got the ICU libraries form http://download.icu-project.org/files/icu4c/4.8.1.1/icu4c-4_8_1_1-Win32-msvc10.zip

              • I copied the icu headers ti d:\cpp\include

              • I copied the icu lib files (*.lib and *.dll) to d:\Qt\qt5\qtbase\lib

              • I renamed icuin.lib to icui18n.lib, icuind.lib to icui18nd.lib and icudt.lib to icudata.lib

              • I got ftp://sources.redhat.com/pub/pthreads-win32/pthreads-w32-2-8-0-release.exe for the pthread library

              • I copied the pthreads headers and libraries to d:\cpp\include and d:\cpp\lib

              • I changed one subroutine in d:/Qt/qt5/qtwebkit/Tools/Scripts/webkitdirs.pm to the following code (because the mkspec can be a ;-separated path list):
                @sub retrieveQMakespecVar
                {
                my $mkspec = $[0];
                my $varname = $
                [1];

                my $varvalue = undef;
                #print "retrieveMakespecVar " . $mkspec . ", " . $varname . "\n";
                my @mkspecs = split(/;/,$mkspec);
                foreach $mkspec (@mkspecs) {
                local SPEC;
                open (SPEC, "<$mkspec") or next;
                while (<SPEC>) {
                if ($_ =~ /\s
                include((.+))/) {
                # open the included mkspec
                my $oldcwd = getcwd();
                (my $volume, my $directories, my $file) = File::Spec->splitpath($mkspec);
                my $newcwd = "$volume$directories";
                chdir $newcwd if $newcwd;
                $varvalue = retrieveQMakespecVar($1, $varname);
                chdir $oldcwd;
                } elsif ($_ =~ /$varname\s*=\s*([^\s]+)/) {
                $varvalue = $1;
                last;
                }
                }
                close SPEC;
                last if defined($varvalue);
                }
                return $varvalue;
                }@

              • sub retrieveQMakespecVar
                {
                my $mkspec = $[0];
                my $varname = $
                [1];

                my $varvalue = undef;
                #print "retrieveMakespecVar " . $mkspec . ", " . $varname . "\n";
                my @mkspecs = split(/;/,$mkspec);
                foreach $mkspec (@mkspecs) {
                local SPEC;
                open (SPEC, "<$mkspec") or next;
                while (<SPEC>) {
                if ($_ =~ /\s
                include((.+))/) {
                # open the included mkspec
                my $oldcwd = getcwd();
                (my $volume, my $directories, my $file) = File::Spec->splitpath($mkspec);
                my $newcwd = "$volume$directories";
                chdir $newcwd if $newcwd;
                $varvalue = retrieveQMakespecVar($1, $varname);
                chdir $oldcwd;
                } elsif ($_ =~ /$varname\s*=\s*([^\s]+)/) {
                $varvalue = $1;
                last;
                }
                }
                close SPEC;
                last if defined($varvalue);
                }
                return $varvalue;
                }
                @

              • sub retrieveQMakespecVar
                {
                my $mkspec = $[0];
                my $varname = $
                [1];

                my $varvalue = undef;
                #print "retrieveMakespecVar " . $mkspec . ", " . $varname . "\n";
                my @mkspecs = split(/;/,$mkspec);
                foreach $mkspec (@mkspecs) {
                local SPEC;
                open (SPEC, "<$mkspec") or next;
                while (<SPEC>) {
                if ($_ =~ /\s
                include((.+))/) {
                # open the included mkspec
                my $oldcwd = getcwd();
                (my $volume, my $directories, my $file) = File::Spec->splitpath($mkspec);
                my $newcwd = "$volume$directories";
                chdir $newcwd if $newcwd;
                $varvalue = retrieveQMakespecVar($1, $varname);
                chdir $oldcwd;
                } elsif ($_ =~ /$varname\s*=\s*([^\s]+)/) {
                $varvalue = $1;
                last;
                }
                }
                close SPEC;
                last if defined($varvalue);
                }
                return $varvalue;
                }
                @
                (Continued in next post)

              Helmut Mülner

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                hmuelner
                wrote on 8 Mar 2012, 13:05 last edited by
                #72

                (Continued)

                • cd d:\Qt\qt5\qtwebkit
                • set PATH=%PATH%;d:\Qt\qt5\gnuwin32\bin
                • set QMAKEPATH=D:\Qt\qt5\qtwebkit\Tools\qmake
                • perl Tools\Scripts\build-webkit --qt

                It now fails in qtwebkit\Source\WebCore:

                nmake.exe -f Makefile.WebCore.DerivedSources

                breaks with: NMAKE : fatal error U1095: expanded command line 'echo D:/Qt/qt5/qtwebkit/Source/WebCore/Modules/geolocation/Geolocation.idl ...[lots of idl files] ... | tr ' ' '\n' > generated/idl_files.tmp && perl -ID:/Qt/qt5/qtwebkit/Source/WebCore/bindings/scripts D:/Qt/qt5/qtwebkit/Source/WebCore/bindings/scripts/resolve-supplemental.pl --defines "LANGUAGE_JAVASCRIPT=1 ENABLE_CHANNEL_MESSAGING=1 ENABLE_SQL_DATABASE=1 ENABLE_DATALIST=1 ENABLE_WORKERS=1 ENABLE_SHARED_WORKERS=1 ENABLE_XSLT=1 ENABLE_FILTERS=1 ENABLE_CSS_FILTERS=1 ENABLE_SVG=1 ENABLE_JAVASCRIPT_DEBUGGER=1 ENABLE_WEB_SOCKETS=1 ENABLE_WEB_TIMING=1 ENABLE_TOUCH_EVENTS=1 ENABLE_GESTURE_EVENTS=1 WTF_USE_TILED_BACKING_STORE=1 ENABLE_NOTIFICATIONS=1 ENABLE_DETAILS=1 ENABLE_METER_TAG=1 ENABLE_PROGRESS_TAG=1 ENABLE_BLOB=1 ENABLE_REQUEST_ANIMATION_FRAME=1" --idlFilesList generated/idl_files.tmp --supplementalDependencyFile generated/supplemental_dependency.tmp --idlAttributesFile D:/Qt/qt5/qtwebkit/Source/WebCore/bindings/scripts/IDLAttributes.txt --preprocessor "D:\Qt\qt5\qtbase\bin\moc.exe -E"' too long

                (the command line is approx. 31400 characters long).

                Does anybody have an idea how to fix this section in DerivedSources.pri?
                @resolveSupplemental.input = IDL_ATTRIBUTES_FILE
                resolveSupplemental.script = $$RESOLVE_SUPPLEMENTAL_SCRIPT

                FIXME : We need to use only perl at some point.

                resolveSupplemental.commands = echo $$IDL_BINDINGS | tr ' ' '\n' > $$IDL_FILES_TMP &&
                perl -I$$PWD/bindings/scripts $$resolveSupplemental.script
                --defines "$${FEATURE_DEFINES_JAVASCRIPT}"
                --idlFilesList $$IDL_FILES_TMP
                --supplementalDependencyFile ${QMAKE_FUNC_FILE_OUT_PATH}/$$SUPPLEMENTAL_DEPENDENCY_FILE
                --idlAttributesFile $${IDL_ATTRIBUTES_FILE}
                --preprocessor "$${QMAKE_MOC} -E"
                resolveSupplemental.output = $$SUPPLEMENTAL_DEPENDENCY_FILE
                resolveSupplemental.add_output_to_sources = false
                resolveSupplemental.depends = $$PWD/bindings/scripts/IDLParser.pm $$IDL_BINDINGS
                GENERATORS += resolveSupplemental
                @

                Helmut Mülner

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                  hmuelner
                  wrote on 21 Mar 2012, 14:07 last edited by
                  #73

                  Build qt5 on Windows 7 with VS2010 (next try, hope this is not a double post).

                  I tried again with the version from 2012-03-21 with this configuration:

                  configure -confirm-license -opensource -debug-and-release -platform win32-msvc2010 -fast -mp -opengl desktop -nomake tests -nomake examples

                  nmake generated the following files in qtbase/bin:

                  qmake.exe
                  moc.pdb
                  moc.ilk
                  moc.exe
                  rcc.pdb
                  rcc.ilk
                  rcc.exe
                  qdoc.pdb
                  qdoc.ilk
                  qdoc.exe
                  uic.pdb
                  uic.ilk
                  uic.exe
                  QtCored5.dll
                  QtCore5.dll
                  QtNetworkd5.dll
                  QtNetwork5.dll
                  QtSqld5.dll
                  QtSql5.dll
                  QtGuid5.dll
                  QtGui5.dll
                  QtXmld5.dll
                  QtXml5.dll
                  QtWidgetsd5.dll
                  QtWidgets5.dll
                  QtTestd5.dll
                  QtTest5.dll
                  QtPrintSupportd5.dll
                  QtPrintSupport5.dll
                  QtConcurrentd5.dll
                  QtConcurrent5.dll
                  QtOpenGLd5.dll
                  QtOpenGL5.dll
                  QtSvgd5.dll
                  QtSvg5.dll
                  phonond5.dll
                  phonon5.dll
                  QtXmlPatternsd5.dll
                  QtXmlPatterns5.dll
                  xmlpatterns.ilk
                  xmlpatterns.pdb
                  xmlpatterns.exe
                  xmlpatternsvalidator.pdb
                  xmlpatternsvalidator.ilk
                  xmlpatternsvalidator.exe
                  QtScriptd5.dll
                  QtScript5.dll
                  QtScriptToolsd5.dll
                  QtScriptTools5.dll
                  QtV8d5.dll
                  QtV85.dll
                  QtQmld5.dll
                  QtQml5.dll
                  QtQuickd5.dll
                  QtQuick5.dll
                  QtQuickTestd5.dll
                  QtQuickTest5.dll
                  qmlscene.ilk
                  qmlscene.pdb
                  qmlscene.exe
                  qmlplugindump.ilk
                  qmlplugindump.pdb
                  qmlplugindump.exe
                  qmlmin.pdb
                  qmlmin.ilk
                  qmlmin.exe
                  qmlprofiler.pdb
                  qmlprofiler.ilk
                  qmlprofiler.exe
                  qmltestrunner.pdb
                  qmltestrunner.ilk
                  qmltestrunner.exe
                  QtQuick1d5.dll
                  QtQuick15.dll
                  qmlviewer.ilk
                  qmlviewer.pdb
                  qmlviewer.exe
                  idc.ilk
                  idc.pdb
                  idc.exe

                  Building of webkit failed when trying to link jsc.exe with a lot of warnings about importing locally defined symbols from JavaScriptCore.lib and 24 unresolved external symbols:
                  JSC::evaluate
                  JSC::checkSyntax
                  WTF::randomNumber
                  WTF::createThread
                  WTF::MetaAllocatorHandle::~MetaAllocatorHandle (12 times)
                  WTF::MetaAllocator::freeFreeSpaceNode
                  WTF::PassRefPtr<class WTF::MetaAllocatorHandle>
                  WTF::MetaAllocator::MetaAllocator
                  WTF::cryptographicallyRandomNumber (4 times)

                  Any guesses how to correct this?

                  Helmut Mülner

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                    hmuelner
                    wrote on 21 Mar 2012, 17:17 last edited by
                    #74

                    Build qt5 on Windows 7 with VS2010 (continued)

                    I could build all other modules (using nmake module-xxx) out of the box with the exception of qtmodule where moc could not parse dsserviceplugin.h because of a comma in Q_PLUGIN_METADATA. After correcting this it also built successfully.

                    Helmut Mülner

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                      hmuelner
                      wrote on 22 Mar 2012, 08:29 last edited by
                      #75

                      qtscript and qtwebkit contain different versions of JavaScriptCore - it looks like syncing qt5 modules does not yet work perfectly ;-)

                      Helmut Mülner

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                      • S Offline
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                        situ117
                        wrote on 30 Mar 2012, 09:36 last edited by
                        #76

                        Hi,

                        I am trying to build Qt5 on Chakra Linux. I have Xcb libraries installed, but when I start configuration script I get an error saying:

                        @No QPA platform plugin enabled!
                        If you really want to build without a QPA platform plugin you must pass
                        -no-xcb and -no-eglfs to configure. Doing this will
                        produce a Qt that cannot run GUI applications.
                        The dependencies needed for xcb to build are listed in
                        src/plugins/platforms/xcb/README@

                        What I am missing here ?

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                          situ117
                          wrote on 30 Mar 2012, 15:07 last edited by
                          #77

                          So the package I was missing was : xcb-util-keysyms

                          configure script was succesful after I installed this package.

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                            subbul
                            wrote on 4 Apr 2012, 17:28 last edited by
                            #78

                            i am facing compilation error in building qt5 (not webkit yet)
                            I am using Ubuntu, with all xcb and other dependency installed using apt-get

                            configure was successful, whereas build failed in "wayland" (error log below).
                            Any clue on the wayland header files mismatch or version problems?

                            @
                            _make[4]: Entering directory `/home/xyz/build/newqt5/qt5/qtwayland/src/plugins/platforms/wayland'
                            g++ -c -pipe -g -fvisibility=hidden -fvisibility-inlines-hidden -D_REENTRANT -Wall -W -fPIC -DQT_NO_LIBUDEV -DQ_PLATFORM_WAYLAND -DQT_NO_WAYLAND_XKB -DQT_WAYLAND_GL_SUPPORT -DQT_WAYLAND_WINDOWMANAGER_SUPPORT -DQ_FONTCONFIGDATABASE -DQT_COMPILES_IN_HARFBUZZ -DQT_PLUGIN -DQT_GUI_LIB -DQT_CORE_LIB -I/home/xyz/build/newqt5/qt5/qtbase/mkspecs/linux-g++ -I. -I/home/xyz/build/newqt5/qt5/qtbase/include/QtCore/5.0.0 -I/home/xyz/build/newqt5/qt5/qtbase/include/QtCore/5.0.0/QtCore -I/home/xyz/build/newqt5/qt5/qtbase/include/QtCore -I/home/xyz/build/newqt5/qt5/qtbase/include/QtGui/5.0.0 -I/home/xyz/build/newqt5/qt5/qtbase/include/QtGui/5.0.0/QtGui -I/home/xyz/build/newqt5/qt5/qtbase/include/QtGui -I/home/xyz/build/newqt5/qt5/qtbase/include/QtPlatformSupport/5.0.0 -I/home/xyz/build/newqt5/qt5/qtbase/include/QtPlatformSupport/5.0.0/QtPlatformSupport -I/home/xyz/build/newqt5/qt5/qtbase/include/QtPlatformSupport -I/home/xyz/build/newqt5/qt5/qtbase/include -I../../../shared -Igl_integration/xcomposite_share -I.moc/debug-shared -o .obj/debug-shared/qwaylandintegration.o qwaylandintegration.cpp
                            In file included from qwaylandshmwindow.h:45:0,
                            from qwaylandintegration.cpp:46:
                            qwaylandwindow.h:112:18: error: ‘wl_callback_listener’ does not name a type
                            make[4]: *** [.obj/debug-shared/qwaylandintegration.o] Error 1

                            _
                            @

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                              subbul
                              wrote on 6 Apr 2012, 10:02 last edited by
                              #79

                              Issue is solved after downloading the release from
                              http://releases.qt-project.org/qt5.0/alpha/

                              instead of GIT

                              [quote author="subbul" date="1333560508"] i am facing compilation error in building qt5 (not webkit yet)
                              I am using Ubuntu, with all xcb and other dependency installed using apt-get

                              configure was successful, whereas build failed in "wayland" (error log below).
                              Any clue on the wayland header files mismatch or version problems?

                              @
                              _make[4]: Entering directory `/home/xyz/build/newqt5/qt5/qtwayland/src/plugins/platforms/wayland'
                              g++ -c -pipe -g -fvisibility=hidden -fvisibility-inlines-hidden -D_REENTRANT -Wall -W -fPIC -DQT_NO_LIBUDEV -DQ_PLATFORM_WAYLAND -DQT_NO_WAYLAND_XKB -DQT_WAYLAND_GL_SUPPORT -DQT_WAYLAND_WINDOWMANAGER_SUPPORT -DQ_FONTCONFIGDATABASE -DQT_COMPILES_IN_HARFBUZZ -DQT_PLUGIN -DQT_GUI_LIB -DQT_CORE_LIB -I/home/xyz/build/newqt5/qt5/qtbase/mkspecs/linux-g++ -I. -I/home/xyz/build/newqt5/qt5/qtbase/include/QtCore/5.0.0 -I/home/xyz/build/newqt5/qt5/qtbase/include/QtCore/5.0.0/QtCore -I/home/xyz/build/newqt5/qt5/qtbase/include/QtCore -I/home/xyz/build/newqt5/qt5/qtbase/include/QtGui/5.0.0 -I/home/xyz/build/newqt5/qt5/qtbase/include/QtGui/5.0.0/QtGui -I/home/xyz/build/newqt5/qt5/qtbase/include/QtGui -I/home/xyz/build/newqt5/qt5/qtbase/include/QtPlatformSupport/5.0.0 -I/home/xyz/build/newqt5/qt5/qtbase/include/QtPlatformSupport/5.0.0/QtPlatformSupport -I/home/xyz/build/newqt5/qt5/qtbase/include/QtPlatformSupport -I/home/xyz/build/newqt5/qt5/qtbase/include -I../../../shared -Igl_integration/xcomposite_share -I.moc/debug-shared -o .obj/debug-shared/qwaylandintegration.o qwaylandintegration.cpp
                              In file included from qwaylandshmwindow.h:45:0,
                              from qwaylandintegration.cpp:46:
                              qwaylandwindow.h:112:18: error: ‘wl_callback_listener’ does not name a type
                              make[4]: *** [.obj/debug-shared/qwaylandintegration.o] Error 1

                              _
                              @[/quote]

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                                yanghaijun
                                wrote on 23 Apr 2012, 13:48 last edited by
                                #80

                                i building qt5 with wingw32,but have a error:

                                qsvgstyle_p.h:65:20: qdebug.h:No such file or directory

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                                  jlayt
                                  wrote on 4 May 2012, 18:00 last edited by
                                  #81

                                  Hi, trying to build qtbase on WinXP using MSVC2008, followed the instructions exactly and it builds OK, but when when I try to run I get:

                                  "Failed to load platform plugin "". Available platforms are: windows:

                                  Any hints?

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                                    stottle
                                    wrote on 4 May 2012, 21:39 last edited by
                                    #82

                                    I am trying to build the qt5-alpha source from the zip download as I don't have git on my windows machine. Is there any way to do a "make clean"/"make confclean" without git?

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                                      Philius
                                      wrote on 6 May 2012, 04:36 last edited by
                                      #83

                                      I just happened to notice your posts - I didn't get an email notification.

                                      According to configure, "To reconfigure, run 'make confclean' and 'configure'.".
                                      Well you probably know that at least with Qt5 alpha, that doesn't work.

                                      I'm on Debian so I can't offer any Windows wisdom, but for "make clean" I just delete the directory and re-unpack the alpha .tar.bz2 again.

                                      I'm in the dark as to how to build/use the QtDeclarative component.
                                      It appears that the header I'm looking for - "QtDeclarative/QDeclarativeComponent" isn't installed although it's in the source tree - yes I built/installed qtjsbackend and qtdeclarative.

                                      Also, it would be nice if Qt5 beta had a top-level makefile that included targets for
                                      linux-x86-32-gcc-x11
                                      linux-x86-64-gcc-x11
                                      windows7-64-msvc2010

                                      and so on, so we could be sure we're building against a known and tested build configuration.

                                      And yes, it should fail if any prerequisites are missing (and maybe print warnings if they are different versions).

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                                        thinks
                                        wrote on 7 May 2012, 19:16 last edited by
                                        #84

                                        Hi All,

                                        I'm trying to building Qt5 om Mac OSX 10.7. Following the instructions given here:

                                        http://qt-project.org/wiki/Building_Qt_5_from_Git

                                        However, I'm running into an issue in the build-step which I'm not
                                        sure how to solve. One of the errors I'm getting is the following:

                                        gcc: error: tools/qlocale_mac.mm: Objective-C++ compiler not installed
                                        on this system

                                        I will give a detailed step-by-step descriptions of my process below,
                                        assuming the starting point to be a blank shell with PWD=$HOME:

                                        (1) git clone git://gitorious.org/qt/qt5.git qt5 [check!]

                                        (2) cd qt5 [check!] :)

                                        (3) perl init-repository --no-webkit [check! Does its job without complaining. I can provide the log if necessary]

                                        (4) unset QTDIR [check!] :)

                                        (5) export PATH="$PWD/qtbase/bin:$PWD/qtrepotools/bin:$PATH" [check!] :)

                                        (6) ./configure -developer-build -opensource -nomake examples -nomake
                                        tests [check! See below]

                                        Get a few warnings about some Qt header not containing macros, e.g.:

                                        QtCore: WARNING:
                                        /Users/thinks/qt5/qtbase/src/corelib/qtcoreversion.h does
                                        not include QT_BEGIN_HEADER

                                        but they don't seem severe. Other relevant output:

                                        Build type: macx-clang
                                        Architecture: x86_64
                                        Host architecture: x86_64
                                        Platform notes:

                                        • Also available for Mac OS X: macx-g++

                                        (7) ./build -j 4

                                        This is where the trouble begins. The following (first) error is given:

                                        [Lots of output without errors...]
                                        qabstractanimation.h -o .moc/debug-shared/moc_qabstractanimation.cpp
                                        gcc: error: tools/qlocale_mac.mm: Objective-C++ compiler not installed
                                        on this system
                                        gcc: error: kernel/qcore_mac_objc.mm: Objective-C++ compiler not
                                        installed on this system

                                        Similar errors are reported further on as well, all with the same
                                        reason given. It seems somewhat strange that gcc is used over g++, but
                                        at the moment I'm not really sure why this happens.

                                        Some info about gcc:

                                        [thinks@wiggs ~] gcc --version
                                        gcc (GCC) 4.8.0 20120408 (experimental)

                                        Any advice greatly appreciated!

                                        Thanks,

                                        T

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                                          ludde
                                          wrote on 9 May 2012, 14:34 last edited by
                                          #85

                                          @thinks, did you try to "build the 5.0 alpha":http://qt-project.org/wiki/Qt-5-Alpha-building-instructions instead? Might be easier than building from git.

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