Qt5 development primer

Philius · wrote on 6 May 2012, 04:36

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).

thinks · wrote on 7 May 2012, 19:16

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

ludde · wrote on 9 May 2012, 14:34

@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.

thinks · wrote on 9 May 2012, 14:41

Thanks, Ludde! :)

We finally got it working here. The following was required:

Grab latest from Qt5 git repo.
git clone git://gitorious.org/qt/qt5.git qt5
Use Qt's provided tool to initialize the repo.
cd qt5
perl init-repository --no-webkit
Set up our build environment.
unset QTDIR
export PATH="$PWD/qtbase/bin:$PWD/qtrepotools/bin:$PATH"
export PATH=/Applications/XCode.app/Contents/Developer/usr/bin:$PATH
export CPP=clang++
export CC=clang
echo PATH $PATH
Pre-build configuration. Note that we are forcing it to build using
the Xcode compilers.
./configure -no-pch -developer-build -confirm-license -opensource
-release -nomake demos -nomake examples -arch x86 -sdk
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk
Build. We could increase the number of course to improve speed once
we are convinced that this works well...
./build -j 1

Not sure all of that stuff is required though, but because the build time is quite steep (even with j > 1) we didn't have time to narrow it down.

Cheers,

T

Bloops · wrote on 11 May 2012, 11:38

hi .

I am currently doing the Qt5 manipulation and I have one little question ^^ .

Is it possible to realize a configuration (./configure) in static Qt5 mode (-static) by incorporing the QtSerialPort class, which we must add to our pre-existing library thanks to that manipulation: http://qt-project.org/wiki/QtSerialPort ?

If this is not possible to change QtSerialPort in static library, but just the QT5 library . When I will compile my project which uses QtSerialPort, will it run like a static program or I need to include a .so (or dll) ?

Sorry for my bad english .

tonys10 · wrote on 13 Jun 2012, 19:49

I am having trouble building Qt5......

I have Visual Studio 2008 andf have installed the latest SDK......

C:\qt5>configure -developer-build -opensource -nomake examples -nomake tests

C:/qt5/qtbase/configure -developer-build -opensource -nomake examples -nomake
tests
Please wait while bootstrapping configure ...

    cl -c -Yc -nologo -Zm200 -Zc:wchar_t -MT -W3 -GR -EHsc -w34100 -w34189

-DUNICODE -DQT_NODLL -DQT_NO_CODECS -DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT
_LITE_COMPONENT -DQT_NO_COMPRESS -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VAR
IANT -D_CRT_SECURE_NO_DEPRECATE -DQT_BOOTSTRAPPED -DCOMMERCIAL_VERSION -I"....
include" -I"....\include\QtCore" -I"....\include\QtCore\5.0.0" -I"....\includ
e\QtCore\5.0.0\QtCore" -I"C:\qt5\qtbase\tools\shared" -I"C:\qt5\qtbase\mkspecs\w
in32-msvc2008" -Fpconfigure_pch.pch -Foconfigure_pch.obj -TP C:\qt5\qtbase\tools
\configure\configure_pch.h

Command line warning D4002 : ignoring unknown option '-Zc'
Command line warning D4002 : ignoring unknown option '-Z:'
Command line warning D4002 : ignoring unknown option '-Zw'
Command line warning D4002 : ignoring unknown option '-Zc'
Command line warning D4002 : ignoring unknown option '-Zh'
Command line warning D4002 : ignoring unknown option '-Zr'
Command line warning D4002 : ignoring unknown option '-Z_'
Command line warning D4002 : ignoring unknown option '-Zt'
Command line warning D4002 : ignoring unknown option '-w34100'
Command line warning D4002 : ignoring unknown option '-w34189'

configure_pch.h
....\include\QtCore../../src/corelib/global/qglobal.h(45) : fatal error C1083:
Cannot open include file: 'stddef.h': No such file or directory
NMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.
*** qtbase/configure exited with non-zero status.

Sfiet_Konstantin · wrote on 2 Jul 2012, 11:08

I have a proble compiling Qt5 master recently
(Linux x86_64 Mageia, GCC 4.7.1)

make[2] : on entre dans le répertoire « /home/qtdev/srcs/qt5/qtsystems/src/systeminfo »
g++ -c -m64 -pipe -g -std=c++0x -fvisibility=hidden -fvisibility-inlines-hidden -Wall -W -D_REENTRANT -fno-exceptions -fPIC -DQT_SHARED -DQT_COMPILER_SUPPORTS_SSE2 -DQT_COMPILER_SUPPORTS_SSE3 -DQT_COMPILER_SUPPORTS_SSSE3 -DQT_COMPILER_SUPPORTS_SSE4_1 -DQT_COMPILER_SUPPORTS_SSE4_2 -DQT_COMPILER_SUPPORTS_AVX -DQT_COMPILER_SUPPORTS_AVX2 -DQT_BUILD_SYSTEMINFO_LIB -DQT_MAKEDLL -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_NO_MTLIB -DQT_NO_SFW_NETREG -DQT_NO_OFONO -DQT_NO_UDISKS -DQT_NO_LIBSYSINFO -DQT_QML_LIB -DQQmlImageProvider=QQuickImageProvider -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I/home/qtdev/mkspecs/default -I. -I/home/qtdev/include/QtCore -I/home/qtdev/include/QtGui -I/home/qtdev/include/QtNetwork -I/home/qtdev/include -I/home/qtdev/include/QtQml -I/home/qtdev/include/QtJsonDb -I../../include/QtSystemInfo/5.0.0 -I../../include/QtSystemInfo/5.0.0/QtSystemInfo -I../../include -I../../include/QtSystemInfo -I../../include -I.rcc/debug-shared -I.moc/debug-shared -o .obj/debug-shared/qnetworkinfo_linux.o qnetworkinfo_linux.cpp
In file included from qnetworkinfo_linux.cpp:56:0:
/usr/include/bluetooth/bluetooth.h: In function ‘uint64_t bt_get_le64(const void*)’:
/usr/include/bluetooth/bluetooth.h:159:9: erreur: expected identifier before ‘’ token
/usr/include/bluetooth/bluetooth.h:159:9: erreur: expected ‘,’ or ‘...’ before ‘(’ token
/usr/include/bluetooth/bluetooth.h:159:9: erreur: expected ‘;’ at end of member declaration
/usr/include/bluetooth/bluetooth.h:159:9: erreur: ‘__v’ does not name a type
/usr/include/bluetooth/bluetooth.h:159:9: erreur: ‘typeof’ was not declared in this scope
/usr/include/bluetooth/bluetooth.h:159:9: erreur: ‘struct bt_get_le64(const void)::<anonymous>’ has no member named ‘__v’
/usr/include/bluetooth/bluetooth.h: In function ‘uint64_t bt_get_be64(const void*)’:
/usr/include/bluetooth/bluetooth.h:164:9: erreur: expected identifier before ‘’ token
/usr/include/bluetooth/bluetooth.h:164:9: erreur: expected ‘,’ or ‘...’ before ‘(’ token
/usr/include/bluetooth/bluetooth.h:164:9: erreur: expected ‘;’ at end of member declaration
/usr/include/bluetooth/bluetooth.h:164:9: erreur: ‘__v’ does not name a type
/usr/include/bluetooth/bluetooth.h:164:9: erreur: ‘typeof’ was not declared in this scope
/usr/include/bluetooth/bluetooth.h:164:9: erreur: ‘struct bt_get_be64(const void)::<anonymous>’ has no member named ‘__v’
/usr/include/bluetooth/bluetooth.h: In function ‘uint32_t bt_get_le32(const void*)’:
/usr/include/bluetooth/bluetooth.h:169:9: erreur: expected identifier before ‘’ token
/usr/include/bluetooth/bluetooth.h:169:9: erreur: expected ‘,’ or ‘...’ before ‘(’ token
/usr/include/bluetooth/bluetooth.h:169:9: erreur: expected ‘;’ at end of member declaration
/usr/include/bluetooth/bluetooth.h:169:9: erreur: ‘__v’ does not name a type
/usr/include/bluetooth/bluetooth.h:169:9: erreur: ‘typeof’ was not declared in this scope
/usr/include/bluetooth/bluetooth.h:169:9: erreur: ‘struct bt_get_le32(const void)::<anonymous>’ has no member named ‘__v’
/usr/include/bluetooth/bluetooth.h: In function ‘uint32_t bt_get_be32(const void*)’:
/usr/include/bluetooth/bluetooth.h:174:9: erreur: expected identifier before ‘’ token
/usr/include/bluetooth/bluetooth.h:174:9: erreur: expected ‘,’ or ‘...’ before ‘(’ token
/usr/include/bluetooth/bluetooth.h:174:9: erreur: expected ‘;’ at end of member declaration
/usr/include/bluetooth/bluetooth.h:174:9: erreur: ‘__v’ does not name a type
/usr/include/bluetooth/bluetooth.h:174:9: erreur: ‘typeof’ was not declared in this scope
/usr/include/bluetooth/bluetooth.h:174:9: erreur: ‘struct bt_get_be32(const void)::<anonymous>’ has no member named ‘__v’
/usr/include/bluetooth/bluetooth.h: In function ‘uint16_t bt_get_le16(const void*)’:
/usr/include/bluetooth/bluetooth.h:179:9: erreur: expected identifier before ‘’ token
/usr/include/bluetooth/bluetooth.h:179:9: erreur: expected ‘,’ or ‘...’ before ‘(’ token
/usr/include/bluetooth/bluetooth.h:179:9: erreur: expected ‘;’ at end of member declaration
/usr/include/bluetooth/bluetooth.h:179:9: erreur: ‘__v’ does not name a type
/usr/include/bluetooth/bluetooth.h:179:9: erreur: ‘typeof’ was not declared in this scope
/usr/include/bluetooth/bluetooth.h:179:9: erreur: ‘struct bt_get_le16(const void)::<anonymous>’ has no member named ‘__v’
/usr/include/bluetooth/bluetooth.h: In function ‘uint16_t bt_get_be16(const void*)’:
/usr/include/bluetooth/bluetooth.h:184:9: erreur: expected identifier before ‘’ token
/usr/include/bluetooth/bluetooth.h:184:9: erreur: expected ‘,’ or ‘...’ before ‘(’ token
/usr/include/bluetooth/bluetooth.h:184:9: erreur: expected ‘;’ at end of member declaration
/usr/include/bluetooth/bluetooth.h:184:9: erreur: ‘__v’ does not name a type
/usr/include/bluetooth/bluetooth.h:184:9: erreur: ‘typeof’ was not declared in this scope
/usr/include/bluetooth/bluetooth.h:184:9: erreur: ‘struct bt_get_be16(const void)::<anonymous>’ has no member named ‘__v’

Seems related to bluetooth, but since I don't know bluez very well, I don't know where to look at.

sierdzio · wrote on 2 Jul 2012, 11:14

Have you updated QTDIR and PATH before starting the build? It seems that your search paths are polluted, or bluetooth.h - maybe - bluetooth.h is not ready for C++11, or something entirely different is happening :P.

Sfiet_Konstantin · wrote on 2 Jul 2012, 11:34

This issue happened to me quite recently actually. (< 2 weeks) my bluetooth.h did not had any problems before ...

Sfiet_Konstantin · wrote on 10 Jul 2012, 10:11

Seems to be ok with latest updates

alpha_one_x86 · wrote on 22 Jul 2012, 19:32

At the compilation under Windows I have:
Creating qmake...
g++ -c -oproject.o -O -IC:\Users\user\Desktop\qt5-src\qtbase/qmake -IC:\Users\us
er\Desktop\qt5-src\qtbase/qmake/generators -IC:\Users\user\Desktop\qt5-src\qtbas
e/qmake/generators/unix -IC:\Users\user\Desktop\qt5-src\qtbase/qmake/generators/
win32 -IC:\Users\user\Desktop\qt5-src\qtbase/qmake/generators/mac -IC:\Users\use
r\Desktop\qt5-src\qtbase/qmake/generators/integrity -IC:\Users\user\Desktop\qt5-
src\qtbase/include -IC:\Users\user\Desktop\qt5-src\qtbase/include/QtCore -IC:\Us
ers\user\Desktop\qt5-src\qtbase/include/QtCore/5.0.0 -IC:\Users\user\Desktop\qt5
-src\qtbase/include/QtCore/5.0.0/QtCore -IC:\Users\user\Desktop\qt5-src\qtbase/s
rc/corelib/global -IC:\Users\user\Desktop\qt5-src\qtbase/mkspecs/win32-g++ -IC:
Users\user\Desktop\qt5-src\qtbase/tools/shared -DQT_NO_TEXTCODEC -DQT_NO_UNICODE
TABLES -DQT_LITE_COMPONENT -DQT_NO_COMPRESS -DUNICODE -DHAVE_QCONFIG_CPP -DQT_BU
ILD_QMAKE -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VARIANT -DQT_NO_DATASTREAM
-DQT_BOOTSTRAPPED -DQMAKE_OPENSOURCE_EDITION project.cpp
g++: CreateProcess: No such file or directory
mingw32-make: *** [project.o] Error 1
del /f project.o main.o makefile.o unixmake.o unixmake2.o mingw_make.o option.o
winmakefile.o projectgenerator.o property.o meta.o makefiledeps.o metamakefile.o
xmloutput.o pbuilder_pbx.o borland_bmake.o msvc_nmake.o msvc_vcproj.o msvc_vcxp
roj.o msvc_objectmodel.o msbuild_objectmodel.o registry.o gbuild.o cesdkhandler.
o qbitarray.o qbuffer.o qarraydata.o qbytearray.o qcryptographichash.o qvsnprint
f.o qbytearraymatcher.o qconfig.o qdatetime.o qdir.o qdiriterator.o qfiledevice.
o qfile.o qtemporaryfile.o qfileinfo.o qabstractfileengine.o qfilesystementry.o
qfilesystemengine.o qfilesystemengine_win.o qfilesystemiterator_win.o qfsfileeng
ine.o qfsfileengine_iterator.o qfsfileengine_win.o qglobal.o qhash.o qiodevice.o
qlibraryinfo.o qlist.o qlinkedlist.o qlocale.o qlocale_tools.o qlocale_win.o qm
alloc.o qmap.o qregexp.o qtextcodec.o qutfcodec.o qstring.o qstringlist.o qstrin
gbuilder.o qsystemerror.o qsystemlibrary.o qtextstream.o quuid.o qvector.o qsett
ings.o qsettings_win.o qvariant.o qmetatype.o qxmlstream.o qxmlutils.o qnumeric.
o qlogging.o
Could Not Find C:\Users\user\Desktop\qt5-src\qtbase\qmake\project.o
g++ -c -oproject.o -O -IC:\Users\user\Desktop\qt5-src\qtbase/qmake -IC:\Users\us
er\Desktop\qt5-src\qtbase/qmake/generators -IC:\Users\user\Desktop\qt5-src\qtbas
e/qmake/generators/unix -IC:\Users\user\Desktop\qt5-src\qtbase/qmake/generators/
win32 -IC:\Users\user\Desktop\qt5-src\qtbase/qmake/generators/mac -IC:\Users\use
r\Desktop\qt5-src\qtbase/qmake/generators/integrity -IC:\Users\user\Desktop\qt5-
src\qtbase/include -IC:\Users\user\Desktop\qt5-src\qtbase/include/QtCore -IC:\Us
ers\user\Desktop\qt5-src\qtbase/include/QtCore/5.0.0 -IC:\Users\user\Desktop\qt5
-src\qtbase/include/QtCore/5.0.0/QtCore -IC:\Users\user\Desktop\qt5-src\qtbase/s
rc/corelib/global -IC:\Users\user\Desktop\qt5-src\qtbase/mkspecs/win32-g++ -IC:
Users\user\Desktop\qt5-src\qtbase/tools/shared -DQT_NO_TEXTCODEC -DQT_NO_UNICODE
TABLES -DQT_LITE_COMPONENT -DQT_NO_COMPRESS -DUNICODE -DHAVE_QCONFIG_CPP -DQT_BU
ILD_QMAKE -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VARIANT -DQT_NO_DATASTREAM
-DQT_BOOTSTRAPPED -DQMAKE_OPENSOURCE_EDITION project.cpp
g++: CreateProcess: No such file or directory
mingw32-make: *** [project.o] Error 1
Building qmake failed, return code 2

*** qtbase/configure exited with non-zero status.

but if I cd qtbase/qmake/;mingw32-make all it work.

gwfr · wrote on 2 Aug 2012, 09:24

On MAC I encountered a problem: Under the last version of XCode you have to download the "command lines tools" seperatly from the xcode settings in the downloads pane.

GeneralPanic · wrote on 24 Aug 2012, 14:10

I was getting "The Remote End Hung up Unexpectedly" when running "perl init-repository". I found that if I used the "-http" option at the end of that line, the failures stopped. It seems that the "git" protocol is a bit flaky. Making http the default in the "init-repository" script would make the process a bit more robust.

sierdzio · wrote on 24 Aug 2012, 14:15

You can also rerun the script with "-f". Doesn't fix git protocol, but often it works on second try.

GeneralPanic · wrote on 24 Aug 2012, 16:20

Yeah, unfortunately for me, re-runnng w/git kept failing at different points.

bibbinator · wrote on 15 Nov 2012, 02:30

Hi,
I'm new to command line compiling and Git.

Thanks to the excellent "guide":http://qt-project.org/wiki/Building_Qt_5_from_Git I was able to build Qt from source. Now, with the latest beta 2 release, I'd like to update Qt.

My question is simple:

Do I need to run configure after:

git pull
git submodule update --recursive

Or can I just run make again without doing that?

A suggestion would be to update the "Getting Updates" section to include this answer as maybe others would wonder if they need to do that too.

Thanks,
Brett

sierdzio · wrote on 15 Nov 2012, 06:29

Tricky. Depends on what has changed in the source code, really. If you have a solid CPU and a bit of time on your hands, you can definitely try just running make, and then if it fails, you should do a proper clean (git clean -dxf, check the link you provided for a submodule declaration), configure and make.

bibbinator · wrote on 15 Nov 2012, 06:48

Thanks for your post. I modified the wiki page updates section with a note that clean and configure may need to be re-run.

invisible · wrote on 27 Nov 2012, 12:28

I'm building on windows 7 x64 with msvc2010 sp1 nmake.

For some reason the naming convention is different then the beta release and incompatible with the vs-addin..

All my lib files, dll files etc are named Qt5[lib].dll/lib instead of Qt[lib]5.dll/lib

My config: configure -developer-build -opensource -nomake examples -nomake tests

lgeyer · wrote on 27 Nov 2012, 12:56

See http://lists.qt-project.org/pipermail/development/2012-October/007215.html