Hi Miguel, On 09/07/2024 01:07, Miguel Ojeda wrote: > Hi Guillaume, all, > > A couple of comments on the Rust bits for context. > > On Tue, Jul 9, 2024 at 12:10 AM Guillaume Tucker <gtucker@xxxxxxxxxx> wrote: >> >> Then Rust support in the kernel is still work-in-progress, so the >> rustc compiler version has to closely follow the kernel revision. > > I wouldn't say the reason is that the support in the kernel is > work-in-progress, but rather that `rustc` does not have all the > features the kernel needs (and "stable"). > > In any case, the version pinning will soon be over -- we are likely > going to have a minimum in v6.11: > > https://lore.kernel.org/rust-for-linux/20240701183625.665574-1-ojeda@xxxxxxxxxx/ > > We are starting small, but it is already enough to cover the major > rolling distributions: Arch, Fedora, Debian Sid (outside the freeze > period) and perhaps Testing too, Gentoo, Nix unstable, openSUSE > Slowroll and Tumbleweed... > > So, for some distributions, the Rust toolchain for the kernel can > already be directly from the distribution. So maybe it doesn't count > as "specialised" anymore? (at least for some distributions) > > Of course, I know that you include cutting-edge too :) Ah that's great news. And yes I think it's still "specialised" if you want to build linux-next or rust-for-linux using the cutting-edge rustc with extra features. So instead of always requiring the latest rustc, it would now have a range of versions with a minimum supported in mainline. >> The current state of the art are the kernel.org toolchains: >> >> https://mirrors.edge.kernel.org/pub/tools/ >> >> These are for LLVM and cross-compilers, and they already solve a >> large part of the issue described above. However, they don't >> include Rust (yet), and all the dependencies need to be installed >> manually which can have a significant impact on the build > > Rust is there thanks to Nathan! :) Please see: > > https://mirrors.edge.kernel.org/pub/tools/llvm/rust/ Of course, sorry I think it's the second time I make the mistake in a month of not looking one level down under llvm... Nice! Thanks, Guillaume
