Re: [OE-core] [PATCH v2 03/15] rust: install Rust library sources for 'make rustavailable' support

[Richard Purdie <richard.purdie@linuxfoundation.org>]

On Wed, 2026-01-07 at 13:21 -0500, Randy MacLeod wrote:
>  
> On 2026-01-07 11:34 a.m., Harish Sadineni wrote:
>  
> > On 1/7/2026 12:29 AM, Randy MacLeod wrote:On 2026-01-05 11:24 a.m.,
> > Harish Sadineni wrote:
> > >  We don't want the rust recipe to change based on a kernel config
> > > unless we *really* have to 
> > >  since that essentially doubles the testing that should be done
> > > or leaves a gap in testing of the 
> > >  rust builds. If you do that for the kernel first, then another
> > > recipe later, soon you have a maintenance mess. 
> > >  
> > >  Also if the kernel needs these files, then it's likely that
> > > other software will need it as well. 
> > >  You should analyze why the kernel needs these files and why
> > > other recipes do not. Perhaps any 
> > >  kernel-like image will have the same requirement. Is there a
> > > baremetal image  using rust anywhere 
> > >  that you can use to check on that? I looked but all I found was:
> > >  https://github.com/ahcbb6/baremetal-helloqemu-rust 
> > >  Anyway, let's focus on the linux kernel's requirements for now. 
> > >  
> > >  
> > >  So, how many files are needed and how much FS space do they use?
> >  The file size of the library directory is around 50MB. 
> > I've been around since the 1990s, 50 MB doesn't seem small to me
> > but
>  let's see what other people think.
>  
>  
> Also, how may files is that?
>  
>  What's the content?  ls -lR if the list isn't too long.
>  
>  Does the kernel build need each and every file ? How did you check? 
>  Can we automate the generation of the list of required files by
> scraping the data from the kernel perhaps?
>  
In the scheme of things, 50MB is not great but probably ok. It will be
compressed down for sstate and so on.

It does however need to be in a separate target package, that is
important.

The win here is that if you change DISTRO_FEATURES, rust/rust-native
shouldn't be rebuilding, which is worth a bit of disk usage, IMO at
least.

Cheers,

Richard


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