Windows

We test Slint on these Windows versions and architectures:

Operating System	Architecture
Windows 10	x86-64
Windows 11	x86-64, aarch64

Handle the Console Window

When you run an application, a console window is displayed by default ↗.

To disable the console, specify WINDOWS as a subsystem.

When you run the application from the command line, if the subsystem is set to WINDOWS, it will no longer output stdout. If you need stdout, consider using FreeConsole().

For more details, see #3235 ↗.

Rust

Add the code to the top of the .rs file which contains fn main():

#![windows_subsystem = "windows"]

rust

If you want to keep console output in debug mode:

#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]

rust

C++

Select the WINDOWS subsystem by setting the WIN32_EXECUTABLE ↗ target property on your executable target:

add_executable(my_program ...)
set_property(TARGET my_program APPEND PROPERTY WIN32_EXECUTABLE TRUE)

cmake

Python

Change the extension of your Python script from .py to .pyw. The default Python interpreter associated with Python files then launches without a console window. Alternatively, use pythonw.exe instead of python.exe to launch your Python script.

Rust: Stack Overflows

When developing Rust applications on Windows, you might sooner or later observe the program aborting with STATUS_STACK_OVERFLOW, especially in debug builds. This is a known issue that’s a combination of a high demand for stack space and MSVC defaulting to a stack size for the main thread that’s significantly smaller compared to other operating systems.

You can fix this by configuring the linker. Create a .cargo\config.toml ↗ file in your project (note the .cargo sub-directory) with the following contents:

[target.x86_64-pc-windows-msvc]
# Increase default stack size to avoid running out of stack
# space in debug builds. The size matches Linux's default.
rustflags = ["-C", "link-arg=/STACK:8000000"]
[target.aarch64-pc-windows-msvc]
# Increase default stack size to avoid running out of stack
# space in debug builds. The size matches Linux's default.
rustflags = ["-C", "link-arg=/STACK:8000000"]

toml