[Pkg-rust-maintainers] chromium and rustc in bookworm

[Mike Hommey]

On Mon, Jan 22, 2024 at 03:39:08AM +0200, Adrian Bunk wrote:
> On Sun, Jan 21, 2024 at 06:55:31PM -0500, Andres Salomon wrote:
> >...
> > b) Backport the profiler patch to bookworm's rustc, and do a s-p-u update to
> > Bookworm's rustc. Since this adds a new feature, I don't view it as too
> > risky, but the release team or rust team may feel differently. The main
> > downsides to this are the potential for breaking existing packages in
> > stable, and the fact that Chromium will undoubtedly begin to rely on newer
> > Rust language features (as they do with Clang) which may not work on
> > bookworm's 1.63.0. Once that happens, we'll be right back here.
> > 
> > c) Much like the Firefox maintainer(s) created rustc-mozilla for
> > (old)oldstable, we create a 'rustc-chromium' package for bookworm. It could
> > even be used for Firefox if their ESR updates start needing newer Rust
> > language features (in which case, maybe 'rustc-newer' or 'rustc-browsers' is
> > a better name for it? Or like Clang, include the major version and call it
> > 'rustc-1.70').
> > 
> > 
> > As I'm still messing around with bookworm's rustc(+profiler) as well as
> > trying to get Chromium 121.x to build in Sid, I don't have a strong opinion
> > on this yet. However, I wanted to bring it to everyone's attention, and see
> > if anyone else did have strong opinions either way. If one of the teams
> > feels strongly against option (b) for example, I won't bother continuing to
> > work on that option.
> 
> IMHO c) would be best, with one rustc-* package shared for both browsers.
> 
> AFAIK rustc 1.78 (to be released in May) will be required by the next 
> Firefox ESR 128, and bookworm will switch to 128 in September/October.

At this point, there is no saying which specific version will be
required, but the one thing that is sure is that it will be at least
1.70. If I had to guess, I'd say it might be 1.75, but so far, it looks
like it might as well stay 1.70.

Interestingly, 1.70 is what we currently have in unstable, which means
unstable is > 6 months outdated already.

Mike