How to list multiple slint files inside CMake?

[pedropark99]

Hey! I'm trying to build something in C++ with Slint, and, I want to separate my components in multiple .slint files in my project.

Currently, I've declared a variable in my CMake script to store a list of all .slint files in the project, and I just pass this variable to the slint_target_sources() function, like this:

set(SLINT_UI_LIST ${SLINT_UI_LIST}
    ./src/gui/slint/welcome_ui.slint
    ./src/gui/slint/library_ui.slint
)
# Many lines etc.
slint_target_sources(caju ${SLINT_UI_LIST})

However, I'm currently getting an error in the ninja build command:

ninja: error: build.ninja:307: multiple rules generate slint_generated_welcome_ui_1.cpp

This error occurs everytime that the list of .slint files have two or more files in it. If I include only one file in the list. Everything works as expected.

So, I'm probably doing something wrong in my CMake script. So, my question is which is the correct way to declare multiple .slint files in my project?

[ogoffart]

Looks like a bug.

This should work

slint_target_sources(caju ./src/gui/slint/welcome_ui.slint NAMESPACE welcome_ui)
slint_target_sources(caju ./src/gui/slint/library_ui.slint NAMESPACE library_ui)

(tested there : https://github.com/slint-ui/slint/blob/master/api/cpp/tests/multiple-includes/CMakeLists.txt)

But I'm afraid the slint_target_sources is badly named and should have been named slint_target_source maybe. Because if you put things in the same namespace, you'll get symbols conflicts.

[pedropark99]

I did try to list one file per slint_target_sources() call before, but I got the "symbol conflict" error that you've mentioned. Therefore, I would also state in the docs that the NAMESPACE argument is also crucial in this case.