Rust STD support for the ESP-IDF framework

ivmarkov commented 3 years ago

This is a cleaned up version of 5 commits:

Each commit can be applied independently from the others (of course, you might want to apply the majority of those)
The commits' comments should be relatively self-descriptive

Functionality:

Commit 1 & 2: "espidf"-specific targets for Xtensa as well as the RiscV family of Espressif chips (targets naming and contents as discussed the other day)
Commit 3: The patch against Rust STD itself (library/std)
Commit 4: Updates to README.md
Commit 5: Temporal introduction of a forked libc crate, so that all the stuff works for the esp32c3 chip as well

By the way - as unpleasant as it sounds, we might need to temporarily host the libc fork also in the esp-rs org (currently hosted in my personal space). It contains what it amounts to 5 line changes, so I hope these would be upstreamed quickly.

ivmarkov commented 3 years ago

Btw, these "failing checks" caught me by surprise. Any idea what this is?

MabezDev commented 3 years ago

Thanks looks good to me!

By the way - as unpleasant as it sounds, we might need to temporarily host the libc fork also in the esp-rs org

I think its fine to leave in your personal repo - if that's okay with you! Presumably, we can open a pull request on the upstream libc repo now?

Btw, these "failing checks" caught me by surprise. Any idea what this is?

I'm not entirely sure, but I think upstream rust has dedicated (paid) runners to perform CI and given that is isn't the upstream repo the jobs cannot run - nothing to worry about I think :)

esp-rs / rust

Rust STD support for the ESP-IDF framework #52