Support for musl targets

[thedrow]

As it turns out ctor is not supported on musl targets.
See PyO3/pyo3#599 for example.

Is it possible to implement this crate on musl?
I'm not entirely sure myself.
What do you think?

[mmastrac]

I believe that this crate would support musl if all the deps (proc_macro/etc) support musl, as we only use target_os:

#[cfg_attr(target_os = "linux", link_section = ".init_array")]

[thedrow]

It seems that there is a problem with proc macros in general on musl and its not something you can fix for now.
See PyO3/pyo3#599 (comment)
Thanks anyway.

[mmastrac]

@thedrow I confirmed that it does work with musl, but you need to cross-compile. This worked on my mac:

cross run --frozen --target x86_64-unknown-linux-musl --example example