Bug or wrong usage globals?

[Artem535]

Hi! At the moment, I'm working on a personal project with Slint and C++20. I have some problems with globals. In the project, I’m trying to split the app into pages and widgets. Here’s what the project structure looks like:

|── CMakeLists.txt
...
├── src
│   ├── app
│   │   ├── app.cppm
│   │   └── CMakeLists.txt
│   ├── config
│   │   ├── CMakeLists.txt
│   │   ├── config.cppm
│   │   └── rfl_path.cppm
│   ├── database
│   │   ├── CMakeLists.txt
│   │   ...
│   │   └── slint_adapter.cppm
│   ├── main.cpp
│   └── widgets
│       ├── calendar_widget_logic.cppm
│       └── CMakeLists.txt
...
└── ui
    ├── app
    │   └── mainwindow.slint
    ├── pages
    │   └── client_info.slint
    └── widgets
        └── calendar.slint

I defined two globals in different files (calendar.slint and client_info.slint) and tried to export them in my mainwindow.slint. It works when I export only one global, so I can use it on the C++ side, but when I try to use both, I get a segmentation fault when accessing them from C++ (even though the code compiles without errors).

I tried to debug this, but I found that:

So, I have a few questions:

• Is it possible to use two globals?
• Is it okay to use export in order to access these globals from the C++ side?
• Am I correct in understanding that I can’t access a global unless I use it in the main window?

[ogoffart]

Two globals shouldn't be a problem.

Maybe there is a bug in Slint.

Would you be able to share your code so i can try to reproduce?

[Artem535]

Yes, the full code is here. I also tried to create a minimal example with this problem using the slint C++ template, but the project could not be linked due to this error.

/usr/bin/ld: CMakeFiles/my_application.dir/slint_generated_global_2_1.cpp.o: in function `Global_2::Global_2(SharedGlobals const*)':
slint_generated_global_2_1.cpp:(.text+0x0): multiple definition of `Global_2::Global_2(SharedGlobals const*)'; CMakeFiles/my_application.dir/slint_generated_app-window_1.cpp.o:slint_generated_app-window_1.cpp:(.text+0xc80): first defined here
/usr/bin/ld: CMakeFiles/my_application.dir/slint_generated_global_2_1.cpp.o: in function `Global_2::invoke_callback_2() const':
slint_generated_global_2_1.cpp:(.text+0x30): multiple definition of `Global_2::invoke_callback_2() const'; CMakeFiles/my_application.dir/slint_generated_app-window_1.cpp.o:slint_generated_app-window_1.cpp:(.text+0xcb0): first defined here
/usr/bin/ld: CMakeFiles/my_application.dir/slint_generated_global_2_1.cpp.o: in function `Global_2::Global_2(SharedGlobals const*)':
slint_generated_global_2_1.cpp:(.text+0x0): multiple definition of `Global_2::Global_2(SharedGlobals const*)'; CMakeFiles/my_application.dir/slint_generated_app-window_1.cpp.o:slint_generated_app-window_1.cpp:(.text+0xc80): first defined here

[Artem535]

Hi! Any news on that? Maybe I should provide more information?

[ogoffart]

Sorry, i haven't had time to look at it yet.