I try to deploy my QT Application build on Windows with VC++(Debug mode). I run the application on a PC on which QT is not installed. I also provided some .dll libraries that it requires. Here is the folder layout:
D3DCompiler_43.dll
icudt49.dll
icuin49.dll
icuuc49.dll
libEGLd.dll
libGLESv2d.dll
MyApp.exe
MyApp.ini
Qt5Cored.dll
Qt5Guid.dll
Qt5Widgetsd.dll
plugins
plugins\platform\
plugins\platform\qminimal.dll
plugins\platform\qminimald.dll
plugins\platform\qwindows.dll
plugins\platform\qwindowsd.dll
When i run the application i get an error saying:"Failed to load platform plugin 'windows'. Available platforms are:"
I think it can not find a platform to load altough i provided platforms under the plugins folder. I also add the platform path to system path but it didn't solve also. Any suggestion?
The plugins directory is unnecessary.
Try this structure:
...
Qt5Widgetsd.dll
platform\
platform\qminimal.dll
platform\qminimald.dll
platform\qwindows.dll
platform\qwindowsd.dll
There is a help page which tells in detail how to deploy Qt5 applications for Windows.
The most helpful info from there: There is a Windows deployment tool (windeployqt) which finds all required dlls automatically for you!
You can load your plugins at the start of the program main() as follows:
QCoreApplication app(argv, args);
QString sDir = QCoreApplication::applicationDirPath();
app.addLibraryPath(sDir+"/plugins/platform");
When running Qt in Debug, the output window tells you all the DLLs it loads, and which you then need to inclde in your distribution exe folder.
Related
I have created a program in Qt using Qt Creator. When I open it, the message appears "The program can't start because Qt5Cored.dll and Qt5widgetsx.dll is missing from your computer. Try reinstalling the program to fix this problem."
copy required libraries from you Qt installation to the directory of executable.
Have you really got a static compiled version of Qt? and are you statically compiling your project?... if so your output executable will be around 30-40mb.... and it won't be asking you for dlls.
However it looks like you have a dynamically linked output, in which case you need to find all the DLLs that your projects uses. You can get these from the folder:
<installpath>\Qt\5.5\mingw492_32\bin for example (different if you use linux / msvc)
Keep running the program and grab each dll it complains about... or use somthing like dependency walker (a free executable you can find online) to help determine which DLLs you need.
You probably need (For windows, using mingw):
Qt5Widgets.dll
Qt5Gui.dll
Qt5Core.dll
libwinpthread-1.dll
libstdc++-6.dll
libgcc_s_dw2-1.dll
Or the debug version in your case which end in "d" e.g.: Qt5Core.dll (release), Qt5Cored.dll (debug). Note versions may be different for your installation version. Copy these files next to your executable. OR include <installpath>\Qt\5.5\mingw492_32\bin in your path.
You need to add all the required dlls
C:\Qt\5.2.1\mingw48_32\bin\
to your project. https://forum.qt.io/topic/50705/solved-qt3d-executable-error-qt5cored-dll-is-missing-from-your-computer/2 should solve your problem.
I am trying to build an QT application with version 5.4.
and when ever I am trying to run the exe on a different machine where QT is not installed I am getting below error "The program cannot start because QT5core.dll is missing from your computer, Try reinstalling the program to fix this problem".
and when I copied QT5core.dll with the exe in a machine where QT is not installed its working fine.
Is there any way that I can link QT5core.dll with the exe statically so that whatever place I run this exe it should not ask for any dll.
Thanks,
Tushar
You can build a standalone version of your Qt application so that it doesn't have any library dependencies at runtime. Be warned though: this can greatly expand the size of the .exe generated and the compilation time. Have a look here:
https://wiki.qt.io/Build_Standalone_Qt_Application_for_Windows
and here:
https://wiki.qt.io/How_to_build_a_static_Qt_version_for_Windows_with_gcc
In one of my programs I use QWebView to load and print reports made from HTML documents. So while deployment I copy these libraries, in additional to all other relevant Qt libraries:
Qt5WebKit.dll
Qt5WebKitWidgets.dll
Qt5PrintSupport.dll
plugins/printsupport/windowsprintersupport.dll
After testing on destination machine I've found that printing doesn't work. Thanks for Dependency Walker I've get all the missed libraries. Here is the list:
Qt5Multimedia.dll
Qt5Positioning.dll
Qt5MultimediaWidgets.dll
Qt5Qml.dll
Qt5Quick.dll
Qt5Sensors.dll
Qt5OpenGL.dll
Ok, I can understand why it wants Qt5Multimedia.dll. Browser can play sound etc. But QML! Why I need all these libraries related to QML?? I don't use neither OpenGL nor sensors or positioning. So it's just unnecessary in my case.
And so my question - is there way to deploy only libraries I need in actual fact? And get the program work of course.
I would suggest you to use windeployqt.exe.
From the docs:
The Windows deployment tool can be found in QTDIR/bin/windeployqt. It
is designed to automate the process of creating a deployable folder
that contains all libraries, QML imports, plugins, translations that
are required to run the application from that folder. This is used to
create the sandbox for Windows Runtime or an installation tree for
Windows desktop applications that can be easily bundled by an
installer.
This is how I do:
cd [my program dir]
mkdir RELEASE
cd RELEASE
copy ..\"progname.exe" .
set QTDIR=C:\Qt\Qt5.4.1\5.4\mingw491_32\bin
call %QTDIR%\qtenv2.bat
windeployqt --force "progname.exe"
You could adapt that for your need by changing [my program dir] to your application's folder (containing the .exe file), QTDIR to your Qt MinGW folder (that's what I use) and progname.exe with the name of your executable file.
It will create a release directory with your executable and the needed Qt libraries (.dll's, etc).
[ Solution ]
I want to run my app created with QtSDK on a machine that does not have Qt installed.
I tried to copy the DLL's from the BIN folder to the release of my project, but it did not work.
I tried the following:
I copy all dll's folder d:\Qt\Qt5.0.1\5.0.1\mingw47_32\bin
And pasted it in the folder of my project: d:\projects\mybrowser\mybrowser-build-Desktop_Qt_5_0_1_MinGW_32bit-Release\release
and send it to another computer without Qt
In computer without Qt, I installed vcredist_sp1_x86.exe and tried to run my application browsertest.exe
The following error occurred:
microsoft visual c++ runtime library: this application has requested
the runtime to terminate it in an unusual way
Q: What I really want to know:
How do I run an application built in Qt on other computers (Windows) without Qt installed?
Details:
Qt5.0.1 32bit
mingw 4.7 32bit
QtCreator 2.6.2
Windows 7 64bit.
Intel i5
Folders:
D:\Qt\Qt5.0.1\5.0.1\mingw47_32
D:\Qt\Qt5.0.1\Tools\MinGW
Qt/Mingw:
D:\Qt\Qt5.0.1\5.0.1\mingw47_32\bin\qmake.exe
d:\Qt\Qt5.0.1\Tools\MinGW\bin\gcc.exe
File .pro:
QT += webkitwidgets network core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = browsertest
TEMPLATE = app
RC_FILE = browser.rc
SOURCES += main.cpp\
mybrowser.cpp
HEADERS += mybrowser.h
FORMS += mybrowser.ui
If any information you missed, please let me know.
grateful
To distribute your application you need to copy the DLLs (only the DLLs necessary).
Copy the DLLs necessary from
<DRIVE>:\Qt\Qt<Version_qt>\<Version_qt>\mingw<Version_mingw>\ or <DRIVE>:\Qt\Qt<Version_qt>\<Version_qt>\mingw<Version_mingw>\bin\
eg.: C:\Qt\Qt5.2.0\5.2.0\mingw48_32\ or C:\Qt\Qt5.2.0\5.2.0\mingw48_32\bin
Paste the folder of your application.
Then copy the folders inside of <DRIVE>:\Qt\Qt<Version_qt>\<Version_qt>\mingw<Version_mingw>\plugins
eg.: C:\Qt\Qt5.2.0\5.2.0\mingw48_32\plugins
Paste the folders of your application.
Note: In this example (below), it was necessary to copy DLLs from different places and remove the Debug DLLs (used only to compile in Debug).
Note that the debug dlls end with "d.dll", for example: Qt5Core.dll and Qt5Cored.dll or Qt5Concurrent.dll and Qt5Concurrentd.dll, the ending with "d.dll" should not be copied.
The structure should look something like this (example):
c:\project\app.exe (your app created in Qt)
c:\project\Qt5Core.dll (dll from qt/mingw folder or qt/mingw/bin)
c:\project\platforms (folder from qt/mingw/plugins folder)
c:\project\platforms\qminimal.dll (dll from qt/mingw/plugins/platforms folder)
Only some DLLs the mingw will be needed, so I recommend using the Dependency Walker 2.2
The result should look like this (not all dlls are needed, this can vary by project type):
Thanks to:
+1 for #MartinBeckett, showed me the program to find the DLLs required.
+1 for #WouterHuysentruit, thanks to the application I indicated, I discovered that the contents of the mingw\plugins folder should go straight into the application folder.
#WouterHuysentruit I would consider your answer as correct, but you just said, so I put a simpler explanation. Thanks anyway.
"microsoft visual c++ runtime library: this application has requested the runtime to terminate it in an unusual way"
That's either an ordinary bug, or sometimes a mix of incompatible dlls
Use the (free) depends program on your exe to check which dlls it actually uses - it probably isn't linking all of Qt
Some Qt libs are loaded at runtime from a plugins folder, mostly image formats and database connections - but they woudln't give this error
windeployqt (delivered with QT 5.2+) should do (most?) of the work
I'm developing a Qt application in Linux using Qt Creator (2.1 RC). I've created 2 projects, and used the wizard to add the library project to the application project. However when I run it, I receive the error:
/home/jakepetroules/silverlock/silverlock-build-desktop/desktop/silverlock: error while loading shared libraries: libsilverlocklib.so.1: cannot open shared object file: No such file or directory
Is there some qmake variable I can set so that Qt Creator will set up the environment properly to run? It's quite annoying to have to copy all the files to another directory with a launcher script just to be able to test the build. On Windows it works perfectly - Qt Creator automatically adds the directories containing the DLLs to the PATH when it runs your application (where running it from Explorer would say DLL not found). Mac OS X is even worse, having to run install_name_tool on everything...
So how can I set up my qmake files so everything works right from the run button in Qt Creator? Kind of hard to debug without this ability, too.
I've had a similar problem running qt apps with QTCreator on my linux machine. I've solved it by adding following lines to the .pro file of the client application:
unix:LIBS += -L/home/projects/my_libs/ -lmy_lib
unix:{
QMAKE_LFLAGS += -Wl,--rpath=/home/projects/my_libs/
QMAKE_LFLAGS_RPATH=
}
info on rpath is here: rpath
hope this helps, regards
Yes, Creator has a section where you can set whatever environment you need for running your app.
On Creator 2.0.0 this is accessed by: Projects -> Targets -> (your target) -> Run -> Run Environment (after you have opened your project)
You can then add or remove any environment variables you'd like, including LD_LIBRARY_PATH One thing I'm not sure of is if it is possible to substitute e.g. the build path into the value of those variables, so that you don't have to hardcode that into your LD_LIBRARY_PATH.
Another option would be to add a small shell script to your source tree which sets whatever variables are necessary, and add a "Custom executable" run configuration to run that script. That's accessed through the same screen.
Just using this:
unix:LIBS += -L/home/projects/my_libs/ -lmy_lib
unix:{
QMAKE_LFLAGS += -Wl,--rpath=/home/projects/my_libs/
}
It's sloved my problem too.