release a program

JohnJ

sorry I don't really understand what you mean. I add Qt path in Qtcreator?

JohnJ

Otherwise I could delete latex from my computer, that's simpler, I don't need it anymore. Does it solve the problem as well?

SGaist

Hi and welcome to devnet,

First thing: NEVER change your PATH environment variable to add a path with .dlls in it.

What will happen is what you are experiencing right now: another application using Qt has put itself in the PATH so now your application uses that version of Qt before the one that's in the same folder as the executable.

So in your case, yes, you can remove LateX from your computer and your application should start working or at least start give you errors related to the Qt .dlls that you are bundling it with.

VRonin

PATH should be the last place dlls are searched into so if you deploy the dlls correctly in the .exe folder it should work regardless of how much junk other programs append to PATH

Source:
https://msdn.microsoft.com/en-us/library/windows/desktop/ms682586(v=vs.85).aspx

JohnJ

Hi ,
I removed latex and miketek, re-install Qt and that's clearer. I have problems with <<Qt5Widget.dll>> . When I run dependWalker, it sends :
Error: At least one required implicit or forwarded dependency was not found.
Error: At least one module has an unresolved import due to a missing export function in an implicitly dependent module.
Warning: At least one delay-load dependency module was not found.
Warning: At least one module has an unresolved import due to a missing export function in a delay-load dependent module

and when I look for this dll in my computer, I find only Qt5Widget that don't have modified for few months while I installed Qt today, that's weird. thanks

SGaist

How are you doing the deployment part ? Are you using windeployqt ?

euchkatzl

Did you read the Windows Deployment Article here ?
http://doc.qt.io/qt-5/windows-deployment.html

JohnJ

In fact, in my lesson at university, I learn that dll's could be simply put in the same file that the exe and the exe will run(I understand it like this, in any case). So I've never learned about specific deployment

jsulm

@JohnJ You can do it manually or you can use windeployqt - it will find out which dlls are needed.

VRonin

@JohnJ said:

simply put in the same file that the exe and the exe will run

This is false.
dll means dynamically linked library so by definition it is not included in the main application.
You can put them in the same folder as the exe and the exe will run but if you want it embedded in the .exe file you need to rebuild the dll project as a static library and link the static .lib to the app

JohnJ

My program run ! thank you so much for your advice and your patience :)