Rust ESP32 Community Meeting 2021-07-27

[georgik]

Please add topics and links to this discussion.

The meeting is scheduled 27th July 2021 - 4pm CEST/GMT+2 via Google Meet. The meeting invite is automatically sent to attendees of previous meetings. If you'd like to join, please let me know.

Notes and topics from previous meetings:

• Rust ESP32 Community Meeting 2021-07-20 #55
• Rust ESP32 Community Meeting 2021-07-13 #53

[georgik]

Topics:

• Discovered limitation: Arch arm64 on Linux not supported by ESP-IDF - Feature request: toolchain for Nvidia Jetson Nano, Xavier, TX2 aarch64 hosts? (IDFGH-4618) espressif/esp-idf#6432
• Review of issues from GitHub
• Docker and CI build
• github.com/esp-rs/rust - binary artifacts - missing support for STD in default branch esp
• can somebody provide theory behind this correction?

$ mkdir vendor
$ cd vendor
$ ln -s ../library/rustc-std-workspace-alloc/ rustc-std-workspace-alloc
$ ln -s ../library/rustc-std-workspace-core/ rustc-std-workspace-core
$ ln -s ../library/rustc-std-workspace-std/ rustc-std-workspace-std

• rust toolchain name - current xtensa - should be changed to esp?

[ivmarkov]

• Rust support for ULP RISCV chip in ESP32-S2/ESP32-S3
  • Proof of concept implemented; compiles, runs and blinks a LED with stock Rust compiler and with some alterations to the Rust riscv-rt crate
  • Q: Future of RiscV ULP?
• Rust libStd patches
  • Merged into the (now unified) GitHub esp-rs compiler
  • Submission to upstream imminent

[MabezDev]

• Start of upstreaming
  • Rebase patch set of of esp-rs/rust, now we have it all in one place?
  • Xtensa vs RISC-V upstreaming effort
• Xtensa bare metal targets
  • Remove generic no_std xtensa target from the compiler? Doesn't seem to make much sense anymore.
• Bare metal RISC-V
  • PR Fixes to riscv/riscv-rt crate

[MabezDev]

Remove generic no_std xtensa

To clarify the target we would be removing is xtensa-none-elf - which is essentially useless.