Deploying Qt application

ODБOï

Hi, I have 'finished' my qt application and now i want to deploy it but have problemes..

In Debug mode I can compile and run (from Qt Creator) my app without errors. But if i try to run it with myApp.exe (after adding Qt dlls) I have an error saying :

entry point procedure _ZdaPvj could not be found in libstdc++-6.dll

then I add libstdc++-6.dll and try to restart app, and now i have no errors when i double click on myApp.exe, it just don't start.

Other probleme is, when i switch to Release mode,it looks like my app Compiles witout errors but crashes if i try to run (even from Qt creator).

Im using Qt 5.8.0 MinGW 32bit
Im including/using open62541.h/.cpp (free OPC UA implementation https://open62541.org/)

Thx in advance for help
LA

ODБOï

Thx very much guys! i finally changed Qt version, from 5.8 to 5.10 now its working fine!
Thx

jsulm

@LeLev You should take a look at http://doc.qt.io/qt-5/windows-deployment.html
If your app crashes in release mode when starting from QtCreator then you most probably have an issue in your code. You should take a look at the stack trace when it crashes.

Sillimon

Hi ! Are you using any other libraries than Qt's ?

I had this problem not that far ago and i wonder if it was not due to the fact i used the wrong library file.
Like using the release for the debug one or something like that...

It may be something completely different but check that too

ODБOï

@jsulm,
When my app crashs in release mode i have nothing interesting in stack trace :

11:26:24: Start : "C:\Qt\Tools\mingw530_32\bin\mingw32-make.exe"
C:/Qt/Tools/mingw530_32/bin/mingw32-make -f Makefile.Release
mingw32-make[1]: Entering directory 'C:/Users/user/Documents/build-16K-Desktop_Qt_5_8_0_MinGW_32bit-Release'
mingw32-make[1]: Nothing to be done for 'first'.
mingw32-make[1]: Leaving directory 'C:/Users/user/Documents/build-16K-Desktop_Qt_5_8_0_MinGW_32bit-Release'
11:26:25: Le processus "C:\Qt\Tools\mingw530_32\bin\mingw32-make.exe" ended normaly.
11:26:25: Time : 00:01.

@Sillimon, i'm only using open62541.h/.cpp (free OPC UA implementation protocole https://open62541.org/)
i added unix|win32 : LIBS += -lWS2_32 in my .pro file because open62541 needs ws2_32.dll

Thx to you two

Sillimon

So it only works in Debug from QtCreator...
Could it be a variable or pointer problem ? That could make the difference between debug and release ?
Verify initialization of those, maybe ?

J.Hilk

@LeLev
theres can be a ton of different reasons, why the release build crashes but the debug one not

here's a good List to check

list

The number one reason for me, so far, was always Variable initialization hence my ever growing habit of initializing EVERYTHING ;-)

ODБOï

Thx very much guys! i finally changed Qt version, from 5.8 to 5.10 now its working fine!
Thx