rust 1.61.0 support

[jelmd]

Since on Ubuntu LTS 20.04 (focal) - and probably on its derivations, too - rust 1.61.0 is the only supported version, it would be nice to get the fuc compiled there as well. Right now it fails with something like "blabla requires rustc 1.63.0" or even 1.64.0 ...

[SUPERCILEX]

Unfortunately I need a number of nightly features, so no stable version of the compiler will work. I don't expect this to change anytime soon. You'll want to use the prebuilt binaries or rustup: https://doc.rust-lang.org/cargo/getting-started/installation.html

[jelmd]

Hmmm, ok. Idea was to provide it on our cluster nodes. But there only packages are allowed and I build the missing ones with supported compilers, only. Anyway, if users think they need it, they can build, or download, or bench on their own risk ... ;-)

[jelmd]

BTW: x86_64-unknown-linux-gnu binaries do not work as well, because they are linked against GNU libc > 2.31.

[SUPERCILEX]

Hmmm, you'll probably need to use the *-musl variants then (as they're statically linked). 20.04 is pretty old at this point.

[andreasstieger]

I checked and the nightly features you are using are not in 1.68 either. Your choice, but even rolling distributions would appreciate if you found a way to target current rust stable.

[SUPERCILEX]

I really don't want to have to copy all of once_cell, but I dropped some features that should be implemented with other nightly features anyway. So basically this is pending once_cell stabilization.

[andreasstieger]

Thanks. For once_cell it seems there is a crate version at https://docs.rs/once_cell/latest/once_cell/ If that is the last one this would bring fuc to the realm of rust stable

[SUPERCILEX]

Lemme first see if I can get once_cell moving again: it finished its fcp back in January, so it's a little surprising that it hasn't been merged yet. Otherwise, are people building from master or tags? I could potentially just apply a patch before tagging that has stable support and keep master on nightly.

[andreasstieger]

Distros can build from any git reference including tags, and any combination of patches on top, including non-contiguous series. I'll volunteer my openSUSE package for fast feedback.

[SUPERCILEX]

Hmmm, ok. I don't want to make any guarantees that I won't return to requiring nightly, but it's currently trival to support building the binaries with stable. cargo test still requires nightly, but that isn't a problem I hope/assume.

Triggered a release: https://github.com/SUPERCILEX/fuc/actions/runs/4536253663
Patch applied in 1.1.7: e2285aa

[SUPERCILEX]

As a sanity check, it'd be helpful if someone could cargo install rmz cpz on stable rust.

[andreasstieger]

Looks good with (at least) rust 1.68, package works. For cargo install rmz cpz see separate issue referred below.