Conan + CMake + Qt 6.5 deployment issue

codeform

I have implemented a very simple C++ test project (simple QMainWindow) using Conan, CMake and Qt 6.5 that I would like to build and deploy on multiple platforms.
So far, I was able to build an EXE but haven't figured out how to script the CMakeLists.txt to deploy the EXE and its dependencies.

These are the commands that I am using:

mkdir build && cd build
conan install .. --build=missing
cmake ..
cmake --build .

So far so good, but when I am running cmake --install., I am getting errors such as:

CMake Error at .qt/deploy_TestDeploy_4a9b6cc5f7.cmake:1 (include):
include called with wrong number of arguments. include() only takes one file.

If I open this file .qt/deploy_TestDeploy_4a9b6cc5f7.cmake, I can see the first line has an include() statement with no argument.

I have tried all the scripts I found online (on the Qt site and others) but none of them works. For instance:
https://doc.qt.io/qt-6/qt-generate-deploy-script.html
https://www.qt.io/blog/cmake-deployment-api

Maybe someone can share some code snippets? Ideally, I would like the CMakeLists.txt to work on all platforms (Windows, Linux and MacOS).

cristian-adam

What happens if you use something like:

cmake --install . --prefix instdir

?

codeform

@cristian-adam

I tried that. Same issue.

kuroki

@codeform I'm having the same issue. Conan's version of Qt doesn't seem to set the right qt cmake variables.
Namely, QT6_IS_SHARED_LIBS_BUILD and QT_DEPLOY_SUPPORT are missing.