I am trying to run a code available on https://gstreamer.freedesktop.org/data/doc/gstreamer/head/qt-gstreamer/html/examples_2player_2main_8cpp-example.html
But when I try to run the code I get following error.
Cannot open include file: 'QTimer': No such file or directory.
What should I do??
First, you need to install the Open Source version of Qt
Then, create a new Qt project from the Qt Creator IDE and add your files (.cpp, .h, etc.).
I also strongly advise you to read the Getting Started part of the Qt documentation
Related
I've been trying to import an open-source project into Qt-Creator to read the code and to learn from it by debuging. Unfortunatly I cannot build imported projects. I found two interessting projects:
https://sourceforge.net/projects/qpass/files/source/
and
https://github.com/keepassx/keepassx
I imported them into Qt Creator by File-->New File or Project-->Import Project-->Import as qmake Project (Limited Functionality). Afterwards I tried to run the project and I got an error:
G:\Qt Projekte\keepassx-2.0.3\src\autotype\test\AutoTypeTest.h:23: Fehler: autotype/AutoTypePlatformPlugin.h: No such file or directory
The file is definitely existing and it's within the project. I googled it and found that there might be problem when importing Qt4 projects into Qt5. Some user recommended to insert 'Qt += widgets' into the pro-File. But it didn't solve my problem.
Does anybody have an idea how to fix it? Is the way how I am importing projects into Qt Creator wrong?
Instead of "New File or Project", you want to use "Open File or Project". Since both projects use cmake, you should be opening their topmost CMakeLists.txt file. I've verified that both of the projects open that way on OS X with Qt/Creator from macports and build successfully using either the default CodeBlocks - Unix Makefiles CMake Generator, or CodeBlocks - Ninja.
Here are the things I had to do to get the builds going:
Add the macports binary path (/opt/local/bin) to the system environment in the project's build settings. That's so that cmake would find ninja. This is optional if you don't use ninja, but ninja speeds up builds by a good integer factors so it's recommended over make.
Add the /opt/local/include path to the INCLUDE_DIR path in QPass's CMakeLists.txt: otherwise it wouldn't find gcrypt's include files from macports. That wouldn't be a problem on most linux distributions, but you'd need a similar fix on windows.
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 created a static Qt environment using this tutorial:
https://wiki.qt.io/Building_a_static_Qt_for_Windows_using_MinGW
Then I copied the resulting folder (from a virtual machine) to "D:\QtSDK_Static1"
Now when I try to add the "D:\QtSDK_Static1\5.5.1\bin\qmake.exe" to Qt versions I get the following error:
QT version is not properly installed, please run make install
I also added the folder "D:\QtSDK_Static1\5.5.1\bin" to the path variable.
How can I get Qt Creator to use the static Qt-Libs?
Qt installations can not be moved from their initial path. Set up your VM so that Qt will be built in the same path as in the target system.
the build is done using a Windows PowerShell script
Why? It doesn't have to be :)
Ok i found the solution:
simply had to add a file called
qt.conf
in the qmake.exe folder (in my case D:\QtSDK_Static1\5.5.1\bin) with the following content:
[Paths]
Prefix = D:/QtSDK_Static1/5.5.1/
Translations = translations
I am trying to compile the SpeechMe project: http://projects.developer.nokia.com/speechme/wiki so that I can use the voice recognition in another project I want to make.
I have followed all the instructions and downloaded the full sources of Sphinxbase and Pocketsphinx and used them to add all the missing files to the Sphinxbase and Pocketsphinx directories included in SpeechMe. I have compiled them all in the order the wiki says and they all returned: "***Build Complete" but it seems that they did not produce any output files?
I then tried compiling SpeechMe in Qt Creator but it gives me these three errors:
Here is the build log for all configurations: http://sdrv.ms/PxlD6r
Please help, I really don't understand why this is not working!
I'm guessing Carbide should have created those 3 files when compiling but it didn't, any ideas why and what I can do to fix it?
Files must be created inside pocketsphinx tree but they shouldn't be placed in the required location. Most likely you need to find library files and put them into the required folder manually.
Another reason might be that you are compiled a debug version of pocketsphinx while the latest project is looking for a release version of the libraries.
I am trying to build a program using the command scons compiler = msvc. During this action a link error appears: LNK1181: cannot open input file 'QtCore4.lib'. I have installed Qt for Windows from http://qt.nokia.com/downloads (the free version) and tried to find the requested lib file, but only found the same dll file.
Any advice on how to proceed would be most appreciated.
It seems I have built Ot using debug option. Without it creates all the necessary libraries.