I have created a GUI which requires .dll files in order to work. Here the list of those:
mingwm10.dll libgcc_s_dw2-1.dll
QtCore4.dll QtGui4.dll
I have read that I should write
CONFIG += static
in .pro file. But it does not work. Could you help?
You need a Qt installation that is built for static-linking for that CONFIG statement to work. The only way to gt a static Qt install is to download the source package and built it yourself.
Now, to deploy your dynamically linked Qt app, just copy those DLL files to the same folder as your built exe file. This may be easier than building Qt statically.
Related
I have built a very simple calculator in Qt. When I run it in release mode from qt creator, everything works fine. However when I go to the release folder and run it, it gives QT5Core.dll, QT5Widgets.dll and QT5Gui.dll not found. After running windeployqt there by:
windeployqt .
All the dll get added. However, it then gives error VCRUNTIME140_APP.dll and MSVCP140_APP.dll not found. After copying them to the folder. The exe doesn't give any error on double clicking but just does not start. What should I do?
I found this solution here, however I cannot find any qml file in the application directory.
I created it as a QT widget application. I am using Windows 10 with Visual Studio 2017 and MSVC2017 64bit desktop kit. The application is in C++.
Update:
Running the command
windeployqt Calculator.exe
after adding qt to the path seems to do the trick. Application working even after removing qt from the path. Will try running the app inside vm just to be extra sure.
When running from the command line, add your Qt Bin directory to the PATH. For example:
C:\> PATH=C:\Qt\Qt5.11.0\5.11.0\msvc2017_64\bin;%PATH%
You can solve the problem as selbie described it. An another way is to copy the missing .dll-Files to the folder where the.exe is placed.
See here https://doc.qt.io/Qt-5/windows-deployment.html#creating-the-application-package :
To deploy the application, we must make sure that we copy the relevant Qt DLLs (corresponding to the Qt modules used in the application) and the Windows platform plugin, qwindows.dll, as well as the executable to the same directory tree in the release subdirectory.
set variable VCINSTALLDIR, example:
set VCINSTALLDIR=p:\Programs\Microsoft Visual Studio\2017\Community\VC\
and next run
windeployqt.exe app.exe
Or copy vc_redist.x64.exe from Redist subfolder into folder with your application.
As #mosa mentioned, To deploy the application, we must make sure that we copy the relevant Qt DLLs (corresponding to the Qt modules used in the application) and the Windows platform plugin, qwindows.dll, as well as the executable to the same directory tree in the release subdirectory.
To add missing .dll files first open QT MSVC Console and type windeployqt.exe command,
Then you have to go to the directory which .exe file contains. Let's assume my .exe is in the desktop,
C:/
cd user/indrajith/desktop
Then you can add missing .dll files using following command,
windeployqt.exe --quick.
Finally, just double click your .exe file to run the program.
Simple Solution:
Copy "bin" and "plugins" folders from the qt setup directory(C:\Qt\6.2.4\mingw_64) to your release folder.
Put your .exe file inside that "bin" folder and done.
Now, your .exe application should run.The bin and plugin folders contain required .dll files and unnecessary files can be removed manually.
I have a project in Qt Creator and am trying to compile a static release. To do so, I have added "static" to my "CONFIG" option in my .pro file.
After rebuilding all the files, I get a folder named "release" with an executable and a few other files inside of it. When trying to execute the generated file, I get an error that reads as such:
"The procedure entry point __cxa_throw_bad_array_new_length could not be located in the dynamic link library C:\Qt\5.5\mingw492_32\bin\QtCore.dll"
This error message remains whether I use mingw 5.5.0 or 5.4.2 to compile the files.
Using dependency walker and coping the "correct" QT dll files also does not resolve the problem.
What I know already: This error happens to people who copy the wrong QTCore.dll to their project folder. However, since I am not copying any .dll files, I don't know how to use this information to my advantage.
In conclusion, my question is: How do I stop this error from occurring? Moreover, is there a better way to statically compile a qt application?
To build static release of your application you basically need two things:
1) add
CONFIG += static
in your .pro file (you did it) and don't copy any Qt dlls.
2) you need to build static Qt
https://wiki.qt.io/Building_a_static_Qt_for_Windows_using_MinGW
By default Qt is installed prepared for dynamic linking, this is why you need to build static Qt on your own.
You may want to look also at this great Q&A:
Qt static linking and deployment
but it deals mainly with Qt4. Idea is the same.
After you will build static Qt you will need to rebuild your application. And don't copy any Qt dlls.
I was working on Qt Creator compiler to make a simple text editor. I did that but now want to make an .exe file of that project, but I don't know how to make an .exe file in Qt Creator compiler. Can anyone help?
There is a tool that adds the .dlls automatically on windows.
In the command prompt navigate to your qt bin directory. It should look something like this: ...\Qt\5.9.1\msvc2017_64\bin\ (I'm using visual studio).
Run windeployqt.exe in the command prompt with your project location as the argument like this:
windeployqt.exe C:\project_folder\my_project.exe
Now my_project.exe will have the .dlls in the same directory and will execute.
The executable is generated by the compiler when you build your application. To know where the executable is stored, look into
Projects (CTRL+5) -> Build settings -> General -> Build directory
This is where Qt creator will put the .exe it generates if you have shadow build enabled.
If shadow build is disabled, the executable will be stored inside the project folder itself.
From:
How to create executable file for a Qt Application?
Basically you have to look for MinGW subfolder deep into Qt tree, where Qt utilities reside, and copy needed dll's.
These are the steps I follow, based upon Qt 4.7.4, for packaging the application with correct shared libraries.
Let's say you've installed Qt under c:\qtsdk.
Open your project, and compile it in release mode.
Go to this directory: C:\QtSDK\Desktop\Qt\4.7.4\mingw\bin -- it contains all shared libraries. Debug libraries end with a "d" -- frex, QtCore.dll is release version, while QtCoreD.dll is debug version.
Copy at least these files into your release directory (where your .exe lies):
mingwm10.dll
libgcc_s_dw2-1.dll
QtCore4.dll
QtGui4.dll
I just built, tested and deployed a dummy project this way.
I had the same problem so I used the suggested above answer:
"
There is a tool that adds the .dlls automatically on windows.
In the command prompt navigate to your qt bin directory. It should look something like this: ...\Qt\5.9.1\msvc2017_64\bin\ (I'm using visual studio).
Run windeployqt.exe in the command prompt with your project location as the argument like this:
windeployqt.exe C:\project_folder\my_project.exe
Now my_project.exe will have the .dlls in the same directory and will execute.
"
but there somethings that I did so this might help:
there is already an executable version of your app in the debug file of your project if you can't find it try to enter properties in Qt creator an track down the file. while you are at it in properties you can also see whether your app is using msvc2017_64 like in the previous answer or other compilers.
Take that file to the same path you write in the command line here: windeployqt.exe C:\project_folder\my_project.exe.
when your try to open the executable file it will till it needs some dlls files that you can find in this path .\Qt\5.9.1\msvc2017_64\bin copy and paste them in the location of the exe file
Steps to make an exe file from your qt project
In Build Settings make sure Edit build configuration is Release.
In Build Settings uncheck Shadow build(this will make sure that the release folder is inside of your project directory instead of outside of your project directory).
Build and run you project(This will create a release directory inside of yours project folder).
Copy *.dll and *.exe file from C:\Qt\6.3.2\mingw_64\bin to the release folder (where your projects exe file is there).
Copy all folders from C:\Qt\6.3.2\mingw_64\plugins to the release folder.
Now you can launch the exe file inside of your release folder corresponding to your project.
I wrote a Qt application on Linux that compiles and runs. When I try to compile the code on Qt Creator on Windows I can't run the executable.
The application will only run from within Qt Creator. Does this have something to do with dependencies? I know for static builds, I need to build a static version of Qt Creator. But aside from doing that, what else would I need to do for the program to run?
You can place the required QT dlls, QtCore, QtGui, etc, in your .exe's folder.
You should be able to find these dll's in your QT install folder.
If you're not sure which dll's you need - you may want to try out Dependency Walker
You should place Qt DLLs along the release version of your executable. These are Qt5Core.dll, Qt5Gui.dll and possibly the ones for other modules that you have used. These dll files are in your installed Qt Directory in bin folder. You should also place msvcr100.dll and msvcp100.dll in case you are using MSVS2010. If you are using plugins you should place their dll in a folder named "plugins" beside your exe. In case of using icons and images you should ship their dlls like qico.dll and qsvg.dll in a folder named "imageformats".
I installed libxl package file from offcial website. It contains header files in include_cpp folder and libxl.lib in libs folder. I am using QT(cpp) to run my project. I was able to link libxl package to QT in linux (by editing its .pro file by right clicking and adding lib path and include path.). The same in windows is not working. Sometimes it runs the console empty and later on executing again throws an error that .dll files are missing( even when I have added
CONFIG += static
in .pro file.)
I even tried downloading static linking package of libxl and adding the .lib files to QT but still had no good luck.
add this to the INCLUDEPATH: being careful to replace with the correct location of the library
-isystem "C:\path\to\libxl\"
and report back if that helps. this may be considered a hack but it worked for me a few times when problems arose linking boost libraries in windows
You should be fine by adding
win32:LIBS += -LD:/PATH/TO/LIB -lxl
win32:INCLUDEPATH += D:/PATH/TO/LIBHEADERS/
to your .pro file.
Sometimes it runs the console empty and later on executing again throws an error that .dll files are missing
If application compiles cleanly without linking errors yet throwing missing dll errors on start then application can't locate dll files. Dlls should be in the same dir as app is or in dirs in your PATH environment variable. There's also "manifests" thing on windows that can prevent app from loading dll when conditions mentioned above are met.
There's depends.exe tool to inspect dlls app depends on.
even when I have added CONFIG += static in .pro file.
I think setting static in your project file CONFIG var don't change anything. To get static build you must compile qt with static option.