I am trying to build qtwebengine with proprietary codecs. I am following the answer on this stack overflow questions: Build QtWebEngine 5.9.1 with proprietary codecs. I have installed all the specified programs and began trying to build it. I made it to the git checkout 5.9.6 line before I had my first error. I fixed this by changing it to git checkout 5.9.8 and it seemed to work, so I then continued, however now it has given me another error that qmake.exe isn't recognized. I have looked everywhere in the qt folder and can't find any sign of the file. What have I done wrong to mean this has happened, could it be me changing the line to git checkout 5.9.8 or I haven't installed something correctly?
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I have tried to setup QtCreator with Qt 5.9.5 on my new ubutnu 18.04 and have been met with spades of problems. Right now my issue is that certain variables cannot be read by GDB when trying to debug a project. I have already tried tinkering with GDB setting in QtCreator with no success, and now I think my issue is that I do not have the debugging symbols installed for Qt( As mentioned here: https://bugreports.qt.io/browse/QTCREATORBUG-8278)
However when I search for debugging symbols via apt-get search I can see "qt4-bin-dbg - Qt 4 binaries debugging symbols" ( Which I installed ) but nothing for Qt 5. This link : https://packages.debian.org/sid/qtbase5-dbg suggests that it should be called qtbase5-dbg but this also does not exist.
So, does anybody know how I can download the debugging symbols, or any alternative fix???
This answer summarizes the content of the comments above.
Since Ubuntu Zesty, debug symbols for Qt5 are not distributed anymore. More details can be found on askubuntu here.
That is, there was indeed a qtbase5-dbg package, that is not available since Zesty.
Hence the solution is to use the Qt SDK as provided by the Qt company at http://download.qt.io/official_releases/qt/.
Alternatively, you can also download the sources and compile the Qt packages yourself. Using the Qt sources while debugging can be helpful if you experience bugs in the Qt framework itself.
I downloaded Qt5.6 VS2013 32bit and try to run the official example of QtWebEngine.
I just followed the instruction but
When linking it gives out an error of
LNK1104 file not found c:\Users\qt\work\install\lib\Qt5Widgetsd.lib.
However, I have no idea of where this path c:\Users\qt\work\install\lib\ comes from.
I did text search in all directories of example folder and no hits other than generated files(makefiles and pdbs).
I also checked system environment variables but no hits.
Furthermore, I checked Qt Creator'r Projects panel and its Build Environment and still no hits.
Did I miss something?
P.S. this error was given out by linking DemoBrowser example of QtWebEngineWidgets pro
The link is generated by qmake when it generates the build scrip from the qt project file (*.pro). It is based from the qmake application path that is generaly installed together with the libraries (check you qt kit setup to change it if needed: Jst browse to qmake.exe application).
Then try regenerate the build script. It should fix the issue.
You may also have issue with installation not being in debug mode; you are trying to use Qt5Widgetsd.lib library instead of the non-debug one Qt5Widgets.lib
I am trying to install kde-connect following this.
Although my kubuntu version is 14.04, I wanted to compile them so that I can have the latest version. But when I followed the instructions to compile, i get the following error.
-- Found Qt-Version 5.2.1 (using /usr/bin/qmake)
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
QT_QT_INCLUDE_DIR
used as include directory in directory /home/vinaychandra/Downloads/t/CMakeFiles/CMakeTmp
CMake Error: Internal CMake error, TryCompile configure of cmake failed
CMake Error at /usr/share/kde4/apps/cmake/modules/FindKDE4Internal.cmake:1311 (message):
Unable to compile a basic Qt application. Qt has not been found correctly.
Call Stack (most recent call first):
/usr/share/cmake-2.8/Modules/FindKDE4.cmake:95 (find_package)
CMakeLists.txt:7 (find_package)
Please point out how to correct this.
I have tried giving -DQT_QT_INCLUDE_DIR=/usr/share/qt4/
then it tells that You must build your code with position independent code if Qt was built with -reduce-relocations.
Your cmake by default uses a different QT version.
So, you must explicitly tell him which version of QT he have to use for this job.
This one
-DQT_QT_INCLUDE_DIR=/usr/share/qt4/
Is wrong because you mustn't give QT position explicitly.
All you need is to use the right qmake.
So, give'em this flag and you'll be happy!
-DQT_QMAKE_EXECUTABLE=/usr/bin/qmake-qt4
Since most of kde applications are not ported to Qt5, you need Qt4.x for building kdeconnect(don't know x, mine is 4.8.6).
Also Qt4 installer is not available (I think !), so you have to build it also from source. Building Qt4 is quite easy, just download the source and run the usual commands.
After building it, it qmake name will be qmake-qt4 in /usr/bin.
So for building kdeconnect, first run its cmake, then a Cmaketextcache.txt file will form.
In that change the path of qmake (i.e somewhere written /usr/bin/qmake to /usr/bin/qmake-qt4) and also the path of qt include dir to (I think /usr/include/qt5 to /usr/include/qt4), and run the cmake again.
If some packages are missing, then you have to install it.
But with the above changes, you will get a make file to install it.
Unfortunately, the cited documentation is lagging behind the current state of kdeconnect. I ran into similar problems but I managed to solve them by installing the following required packages from the Kubuntu repositories:
sshfs
libfakekey-dev
libxtst-dev
libqca2-dev
libqjson-dev
I trust these are all of them. I installed kdeconnect from the latest git commit and it seems to run fine.
This answer comes a bit late, but this is the first Google search result for the question. In systems with qtchooser (Kubuntu, Ubuntu at least), this can be fixed by running first:
export QT_SELECT=qt4
This makes all of the Qt build tools to default to the Qt4 version instead of Qt5. You can check which Qt version is active by running:
qmake --version
Try kde connect install on ubuntu: https://fazlerabbi37.github.io/blogs/install_kde_connect_in_ubuntu_18.04.html
(in 18.04 & 19.04 it works with simple sudo apt install kdeconnect
Install kde connect on android device (google play store is where I installed from)
Invoke kde connect from desktop
Invoke kde connect from android and search device.
Your ubuntu will be found / initiating a search from desktop results in android phone pulled up for pairing
Accept pairing request
Provide access to folders
Try clicking on a video/image file for transfer
I could see the new file transferring in /Downloads folder of desktop
allowing/disallowing desktop to access sms, notifications etc are now a choice
Note: Pl treat this with pinch of salt. This appears very simple, effective for a main reason it worked for me in no time.
After running configure -static in C:\Qt\Qt5.1.0\Source, I ran mingw32-make. and I get this error (at the bottom of image).
System cannot find the specified file http://puu.sh/3tSh4.png
What files am I missing? I am using Qt 5.1.0, I have downloaded qt-everywhere-opensource-src-5.1.0-rc2.zip and extracted it into C:\Qt\Qt5.1.0\Source, Installed Perl64 in C:\Qt\Qt5.1.0\Source\, ran the prompt as admin, and I have followed this guide:
http://qt-project.org/doc/qt-4.8/deployment-windows.html#linking-the-application-to-the-static-version-of-qt
Building v8 needs python installed and in path make sure that you have it, see more information here especially the requirements to build Qt on windows.
I just updated my Qt to 4.8.3, because the program built from older version is not compatible to the new framework.
So I have to upgrade.
This process was frustrating and time consuming. So many problems came out.
I download Qt from this url:
http://qt-project.org/downloads
At beginning, I installed the MinGW one (I'm not a fan of MSVC).
I tried the newest ( I think it's 4.6) version of MinGW and order version (4.4).
However, after I installed MinGW and tried to install Qt 4.8.3, during the process, the following message shows up:
There is a problem with your MinGW installation:
The installer could not find a valid C:\MinGW\include\w32api.h (Only versions with W32API 3.13 are supported)
Do you still want to continue? (Your installation may not work)
The 4.6 version does have this w32api.h file, I don't know what's going on. And I have trouble finding MinGW 4.4 with this head file.
I decide to ignore this warning and continue to install Qt and Qt creator. After that,
I opened my current project, configure it (why the configuration become so complex...), I tried to build it.
Then the following message shows up because some external lib I used requires Exception Handling:
exception handling disabled, use -fexceptions to enable
And I don't know how to enable the it.
I tried to add -fexceptions flag in QMAKE_CXXFLAGS but it doesn't work.
By the way, I tried the VC version of Qt too, but I used the MinGW before and the VC compiler is quite different, if I use VC version, it will take a lot of time to make it compilable by VC compiler.
Does anyone know how to install Qt 4.8.3 on Windows? my project works fine before, now I just want to compile it successfully.......
These are not the only problem.
I updated the Qt on Mac machine too, it is easier to have the compiler work since it's unix base.
However, I used QtWebkit lib in my project and obviously, they changed this lib and it's not compatible to order version.
I can compile my project on Mac, however, every time I run it, following massage shows up and the program stopped.
dyld: Symbol not found: _OBJC_CLASS_$_CALayerHost Referenced from:
/Library/Frameworks/QtWebKit.framework/Versions/4/QtWebKit Expected
in:
/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore
The program has unexpectedly finished.
Does any one know how to solve this QtWebKit problem? I'll really appreciate.
I remembered that when Qt is under nokia, it's so easy to install and use, the Qt SDK is perfect.
I really hate the change made after it was bought by digia.........
I found solutions of my first two problems:
for the first problem, as I described, download the MinGW provided by Nokia Qt
ftp.qt.nokia.com/misc/MinGW-gcc440_1.zip [ftp.qt.nokia.com]
Tried several versions of MinGW 4.4, I think this is the only one works.
About the second problem, add following configure in the project file:
CONFIG += exceptions
Now the QWebKit problem is only one unsolved.
Is it all relevant that your include directory for MinGW has two "i's" in it or was that a typographic error when posted on SO? See:
The installer could not find a valid C:\MinGW\iinclude\w32api.h