On 2025-12-26 12:53:30 [+0100], Emilio Pozuelo Monfort wrote:
> I just noticed an issue while testing the update: src:rustc-web is not
> available on armel/mips* (it couldn't be bootstrapped because upstream no
> longer provides prebuilt stage0 binaries for those), so the new clamav won't
> be available on those architectures. I tried to build clamav with the older
> rustc by lowering the requirement in .cargo/vendor/*/Cargo.toml (see
> attached patch), but I encountered issues at least in the `half` crate,
> e.g.:
So what does firefox-esr do here? They don't build on armel and mips*.
clamav needs roughly 1GiB of memory with the database and everything and
with the "latest" asynchronous loading of signatures it doubles the
amount during the "update phase". Looking at the docs
https://docs.clamav.net/manual/Installing/Docker.html#memory-ram-requirements
it says
| Minimum: 3 GiB
| Preferred: 4 GiB
these numbers are more than armel boxes have equipped. My armel box has
512MiB. It is no fun to additional swap to compensate for this.
The only loss here might be mips64el but I doubt that someone seriously
is using it there.
Based on this I would suggest to simply remove it on those architectures
rather than not having any security updates in future.
> error[E0658]: use of unstable library feature 'stdsimd'
> -->
> /build/clamav-1.4.3+dfsg/.cargo/vendor/half/src/binary16/arch/x86.rs:44:18
> |
> 44 | let retval = _mm_cvtph_ps(vec.assume_init());
> | ^^^^^^^^^^^^
> |
> = note: see issue #48556 <https://github.com/rust-lang/rust/issues/48556>
> for more information
>
> I don't know how to proceed from here.
If this is the only problem, you could go to src/binary16/arch.rs and
simply remove and "mod x86" and "x86_64" + "x86" references. You need to
always go to the _fallback one and avoid any "support".
This would use the generic software implementation avoiding x86's SIMD
support for floating point. If this is the only problem, it would the
price to pay to remain available on armel and mips*.
I don't know what the implications are if you downgrade the other
libraries…
> Cheers,
> Emilio
Sebastian
