Same as "PHP for Windows", it's not a problem if the trademark owner agrees. And they typically would if the thing is the actual Rust / PHP running on Windows.

The problem with "Linux subsystem for Windows" is that the Linux people were not involved and the thing isn't a normal Linux. So there is much more risk of a trademark dispute in that case.

If I'm not mistaken, the "rust people" were not involved in "Rust for windows". It's just a normal rust crate which wraps the windows API, developed by Microsoft.

That's part of what makes this kind of naming so confusing. "Rust for Windows" sounds like some kind of development in the rust language in the direction of supporting windows, but it's just a library.

I can imagine a trademark holder taking issue with something like this. For instance, imagine the Ford auto compnay marketed their USB port, which you can plug an iPhone into, as "iPhone for Ford Trucks".

edit:

Look at the title in the Rust for Windows github: https://github.com/microsoft/windows-rs

> Rust for the Windows SDK

What does that even mean? "Rust implementation of the Windows SDK API", or "Rust Wrapper for the Windows SDK" would make sense, but this phrasing is completely foreign to anyone doing software.

>the thing isn't a normal Linux.

Interestingly enough, WSL 1 did not contain Linux at all. WSL2 on the of other hand ships the Linux kernel.

That doesn't mean it's 100% compatible or 100% the Linux experience. There are still kinks in it, e.g. SBCL doesn't compile there.