Sources of platform support differences

Posted Oct 17, 2025 10:23 UTC (Fri) by moltonel (subscriber, #45207)
Parent article: Gccrs after libcore

> [rustc_codegen_gcc] does not fully address the problem of architecture support in the Rust standard library, which must be ported separately to each new architecture. So developers are still waiting for gccrs, which is progressing.

Slight misunderstanding here ? Gccrs uses the same standard library as rustc, so that aspect of architecture support is the same on both compilers. If anything, rustc is likely to always have more up to date stdlib platform support.

I don't know if platform definition files are part of the stdlib, maybe that's one area where platform support will differ between the compilers ? I expect any difference here to be short-lived. Beyond that, it'll just be a question of bugs and QA ?