Qt5 development primer

[angrymango]

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

[Philius]

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.

[angrymango]

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.

[Philius]

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.

[Philius]

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

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

[Philius]

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.

[Philius]

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.

[werispaul]

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?

[RazrFalcon]

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.

[dangelog]

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.

[RazrFalcon]

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

[RazrFalcon]

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.

[oneWonders]

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.

[werispaul]

[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).

[Guest]

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?

[Harry443]

Can someone provide a link for Qt 5 Download??

[sierdzio]

git clone git://gitorious.org/qt/qt5.git qt5

"Building Qt5 from Git.":http://developer.qt.nokia.com/wiki/Building_Qt_5_from_Git

[kkoehne]

@oneWonders: I just updated the package dependencies on the wiki, hope all are listed now (it's not that often that one has a clean system to start on ;)

@werispaul: Yes, you need ActiveState perl, and actually also a recent version. But the wiki page already points that out...

@ddriver: No idea. All I can tell you is that most people developing Qt on Windows are using MSVC compilers (MSVC2008, MSVC2010).

[Guest]

Yes, it seems I will have to give it another go using MSVC2010, I am really itching to play a bit with QtQuick 2 :)

EDIT: ARGHHHHHHHHHHH ^%$^@#$@
Naturally, after wasting a ton of time the webkit failed, and just to make things even more irritating, when I configure with -no-webkit it says "Unknown option -no-webkit" even thou -no-webkit is listed in the configure options... WTH?

Also "nmake confclean" doesn't work, returns "NMAKE : fatal error U1073: don't know how to make 'confclean'"

Also, I tried installing ICU so I can build webkit since the configure utility option doesn't work, and the install procedure for ICU involves files that are not even present in the package.

I am so very, very angry I hardly contain from beating my hardware, even thou this is all the lousy software's fault...

I get it that it is free software, prior to final stage, but can it really be that bad? I have build Qt from sources donzes of times and different versions, and it was always effortless.

[pierrevr]

I will add my failure to this thread.

I managed to compile Qt without too many problems by specifying the -prefix ${ROOT}/qtbase (or -developer-build, to be exact). If I remember correctly, with the -developer-build, I still had some installation issues once qtbase passed. I ended up having to manually run install for each submodule...

However, when trying to build for the target platform, with -prefix /usr/lib/qt, as I want it on the target, I run into an error once qtbase is built:

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

So I tried exporting QMAKESPEC as the path to my mkspec, but then I get the following error:

@
cd svg/ && /home/pvr/qt5-build-neon/qtbase/bin/qmake /home/pvr/qt5/qtsvg/src/svg/svg.pro
QMAKE_ABSOLUTE_SOURCE_PATH=/home/pvr/qt5/qtbase -o Makefile
Project ERROR: Cannot load qmodule.pri!
make[2]: *** [svg/Makefile] Error 2
make[2]: Leaving directory /home/pvr/qt5-build-neon/qtsvg/src' make[1]: *** [module-qtsvg-src-make_default] Error 2 make[1]: Leaving directory /home/pvr/qt5-build-neon/qtsvg'
make: *** [module-qtsvg-make_default] Error 2
@

So my question is essentially, is it obligatory to specify the prefix as the path to qtbase? Has anyone else managed to build qt with a different prefix?

edit:
I should add that I am cross-compiling from x86 to an ARM board (iMX515). I built Qt4.8 with no problems previously...