Qt5 development primer

[JKSH]

[quote author="rockdemon" date="1376560830"]W: Failed to fetch http://ppa.launchpad.net/u-szeged/sedkit/ubuntu/dists/raring/main/binary-amd64/Packages 404 Not Found[/quote]It looks like U-Szeged Team has become inactive. They only created packages up till Ubuntu 12.10 (Quantal Quetzal): http://ppa.launchpad.net/u-szeged/sedkit/ubuntu/dists/ Unfortunately that means you can't use this method for Ubuntu 13.04 (Raring Ringtail)

[quote author="bitu" date="1376896656"]I had to give root permission to run this script & fix this issue.
But why it is required to give root permission to run script that is present inside my working directory[/quote]What script, for what issue?

Did you remember to give it execution permissions? (chmod +x, or right-click -> Properties -> Permissions -> Execute) No script is allowed to run unless they have been given permission.

[rockdemon]

thanks for the info :)

I got it working the manual way so all good in the end :)

Cheers,

Rich

[quote author="JKSH" date="1377003458"][quote author="rockdemon" date="1376560830"]W: Failed to fetch http://ppa.launchpad.net/u-szeged/sedkit/ubuntu/dists/raring/main/binary-amd64/Packages 404 Not Found[/quote]It looks like U-Szeged Team has become inactive. They only created packages up till Ubuntu 12.10 (Quantal Quetzal): http://ppa.launchpad.net/u-szeged/sedkit/ubuntu/dists/ Unfortunately that means you can't use this method for Ubuntu 13.04 (Raring Ringtail)

[quote author="bitu" date="1376896656"]I had to give root permission to run this script & fix this issue.
But why it is required to give root permission to run script that is present inside my working directory[/quote]What script, for what issue?

Did you remember to give it execution permissions? (chmod +x, or right-click -> Properties -> Permissions -> Execute) No script is allowed to run unless they have been given permission.[/quote]

[dor666]

How to properly build qt for both 32bit and 64bit (using Ubuntu 64)?

[gmabey]

In the Issues section at the end, one helpful hint may be to describe the error where configure fails on MacOS when certain brew or port packages have been installed with a message that says that no XCB lib found, like this:

Running configuration tests...
The test for linking against libxcb and support libraries failed!
You might need to install dependency packages, or pass -qt-xcb.
See src/plugins/platforms/xcb/README.

The easy workaround is to pass -no-pkg-config to configure.

See also this patch which has not yet been accepted:

https://codereview.qt-project.org/#change,67213,patchset=1

[gmabey]

In the System Requirements -> Windows -> Windows Graphics Drivers section where it says that the DirectX SDK must be installed, perhaps this link

http://www.microsoft.com/en-us/download/details.aspx?id=6812

would be a more useful one than what's there:

http://msdn.microsoft.com/en-us/directx/default.aspx

That is, we don't want to read about DirectX, we just want to download and install the SDK and get on with using Qt! ;-)

[gmabey]

I certainly don't see this stated in the wiki page, but it seems to me that flex is required whenever using Angle… This was in a build of qtbase only, so I'm pretty sure it wasn't a webkit option that caused this build failure:

win_flex --noline --nounistd --outfile=Tokenizer.cpp ........\3rdparty\angle\src\compiler\preprocessor\Tokenizer.l
'win_flex' is not recognized as an internal or external command,

[puffosauro]

I'm trying to build Qt 5 from git with Visual Studio 2008.
My os is Windows Vista SP2

The configuration seems to be ok, but I have a strange problem in the building (nmake): the first time that rcc is used (with mimetypes.qrc), it crashes, so the building can't continue.
I've tried to run rcc manually. If there is some error in the qrc file (eg some file missing) it correcly outputs the error. Instead if it's all right, it crashes.

I also tried to compile the source taken from the zip in the downolad page, but I have the same result.

I don't know what I have to do to better understand the problem.

[puffosauro]

Adding some debug lines in the rcc.cpp code I've found that the problem is the function "qCompress()".
So I added the -qt-zlib option to the configure tool, and now seems to work!

So my question now is why the system zlib cause this problem? I have installed the 7.0 version of the Windows SDK, maybe the 7.1 is needed.
The guide indicates a generic Windows SDK 7 version for Visual Studio 2008...

Now I'm going to build all and I hope that it works!

[JKSH]

What compiler was your system Zlib compiled with?

[puffosauro]

[quote author="JKSH" date="1389219853"]What compiler was your system Zlib compiled with?[/quote]

I don't know... And I don't know how to know :)

[JKSH]

[quote author="puffosauro" date="1389252183"][quote author="JKSH" date="1389219853"]What compiler was your system Zlib compiled with?[/quote]

I don't know... And I don't know how to know :)[/quote]Windows doesn't come with zlib, so if you didn't build zlib yourself, it doesn't exist on your system (unless something else installed it).

I'm guessing something else installed zlib on your system, and that version is incompatible with MSVC 2008. (Another possibility is, there's no zlib on your system but configuration utility thought you did)

[WoldemarShiPa]

Hello. I built qt5 on my Gentoo machine and tried to run one of its tools (designer, for instance) but it failed. No GUI is shown but process runs. Later, I connected to machine through ssh with X forwarding, executed designer and it ran well, GUI was shown. Thanks

[ezust]

There is a nice shortcut for installing build dependencies for qt5 on ubuntu/debian based systems.

sudo apt-get build-dep qt5-default

I'm not exactly sure where to put this tip in the wiki page though.

[JKSH]

[quote author="ezust" date="1412525485"]There is a nice shortcut for installing build dependencies for qt5 on ubuntu/debian based systems.

sudo apt-get build-dep qt5-default

I'm not exactly sure where to put this tip in the wiki page though.
[/quote]Here's a good place: http://qt-project.org/wiki/Building_Qt_5_from_Git (It's a rather massive page though, so read through the whole thing first to find the best place to put yours)

[_dmp]

Hi!

I got http://download.qt-project.org/development_releases/qt/5.4/5.4.0-beta/single/qt-everywhere-opensource-src-5.4.0-beta.tar.xz

When I compile I got errors:

.obj/qsqldatabase.o:qsqldatabase.cpp:function QSqlDatabasePrivate::database(QString const&, bool): error: undefined reference to ‘QDebug::~QDebug()’

.obj/qsqlfield.o:qsqlfield.cpp:function operator<<(QDebug, QSqlField const&): error: undefined reference to ‘QDebug::~QDebug()’

.obj/qtestlog.o:qtestlog.cpp:function QTest::messageHandler(QtMsgType, QMessageLogContext const&, QString const&): error: undefined reference to ‘qFormatLogMessage(QtMsgType, QMessageLogContext const&, QString const&)’

.obj/qnetworkaccessbackend.o:qnetworkaccessbackend.cpp:function QNetworkAccessBackend::createUploadByteDevice(): error: undefined reference to ‘QNonContiguousByteDeviceFactory::createShared(QSharedPointer<QRingBuffer>)’

what can help here?

I build qt for MX6 SOC.

My config is

@unset QTDIR
export PATH="$PWD/qtbase/bin:$PWD/qtrepotools/bin:$PATH"
export LIBS="$PWD:$LIBS"

./configure -opensource -confirm-license
-device imx6
-device-option CROSS_COMPILE=/usr/local/linaro-toolchain/bin/arm-linux-gnueabihf-
-no-pch
-no-opengl
-no-xcb
-opengl es2
-make libs
-nomake examples
-nomake tests
-sysroot /home/work/fs -no-gcc-sysroot
-prefix /opt/qt5
-v@

[_rth_]

Hello.

I am trying to build Qt 5.4.1 on CentOS 5.10. Unfortunately I got stuck on step:

yum install libxcb libxcb-devel xcb-util xcb-util-devel

Error:

sudo yum install libxcb libxcb-devel xcb-util xcb-util-devel
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile

• base: mirror.nsc.liu.se
• epel: mirror.nsc.liu.se
• extras: mirror.nsc.liu.se
• updates: mirror.nsc.liu.se
  Setting up Install Process
  No package libxcb available.
  No package libxcb-devel available.
  No package xcb-util available.
  No package xcb-util-devel available.
  Nothing to do

[WaltPurvis]

This post is deleted!

[iristevski]

@werispaul did you found a solution to this compiling error: "QtGui/QPlatformDialogHelper": No such file or directory?
I have similar problem with missing headers, when compiling Qt from git.

[Roumed]

This post is deleted!

[DungeonLords]

I try build Qt 5.12 on my Ubuntu 18 with X11 on OrangePi 4 like here
Qt soures are on qt5 folder
build folder is parallel qt5
I use
cd build
sudo ../configure -developer-build -opensource -nomake examples -namake tests -confirm-licence -skip webengine -v

And there are errors like failed to create symbolic link 'libreduce_exports.so': Operation not permitted

But I use sudo... Also I try use sudo su. The same. Is this error because of FAT32 file system for my qt5 and build folders?
After make -j 4 I got build/qtbase/lib/libQt5Core.so No such file or directory