Floating point exception when linked with lld

[Yoshanuikabundi]

lld is a linker developed by the LLVM team that (supposedly) has better performance than most system linkers. It is recommended for faster iterative builds by popular crates like Bevy and by the Rust performance book. chemfiles seems to crash with floating point exception (core dumped) when compiled with this linker.

To reproduce this, create a new project using lld:

cargo init chemfiles_lld
cd chemfiles_lld
mkdir .cargo
echo '[build]\nrustflags = ["-C", "link-arg=-fuse-ld=lld"]\n' > .cargo/config.toml

Then add chemfiles to Cargo.toml, add the example program in the readme to src/main.rs, and try to run with cargo run.

I understand that this is probably more effort than it's worth to fix, but I thought I'd raise it just in case someone was interested :) Thanks for chemfiles!

[Luthaf]

Thanks for the report! Which version of chemfiles are you using, and on which OS/CPU?

If you are using version 0.10.2, can you try to use the build-from-sources feature for chemfiles? i.e. use this in your Cargo.toml:

[dependencies]
chemfiles = {version = "0.10.2", features = ["build-from-sources"]}

This version is using pre-built version of the C++ library to cut down on compilation time, but this might have introduced the issue you are seeing.

[Yoshanuikabundi]

Using chemfiles 0.10.2 on Arch Linux (AMD64).

With the build-from-sources feature, everything works! Thanks for the help, this is great.