Undefined reference to compare_and_swap

[peacememories]

When I try to use AtomicBool::compare_and_swap I get the following linker error:

undefined reference to `__sync_val_compare_and_swap_1'

Is the compare_and_swap intrinsic not implemented in this compiler, or is there something I could do to fix this?

[dylanmckay]

Perhaps similar to rust-lang#58500

[dylanmckay]

@peacememories would you please be able to attach an LLVM IR file so I can reproduce this?

[peacememories]

I’d be glad to. Where do I find the relevant files you need? :)

[Rahix]

Generate them with cargo rustc ... -- --emit=llvm-ir -o<...> (if I recall everything correctly)

[peacememories]

Okay, sadly I think I'll have to fix my rust-avr installation before I can do that. In my effort to eliminate error sources I updated it and it's broken right now (see #151)