Add Support For FreeBSD

[worst-git-server]

Motivations

recently, I migrated from Linux to FreeBSD on my workstation. however, espup doesn't seem to support FreeBSD.
this is what I get when I run espup install:

[info]: Installing the Espressif Rust ecosystem
Error: espup::host_triple::unsupported_host_triple

  × Host triple 'x86_64-unknown-freebsd' is not supported

I also tried forcing the installation using espup install -d x86_64-unknown-linux-gnu, but the ELF binaries are compiled for Linux, so they don't run.

• Would you like to implement this feature? [y/n]
  I don't think I have the know-how required for this.

Solution

the solution would be to add support for FreeBSD for espup install.

Alternatives

a possible workaround would be to use the Linux compatibility layer, but not as a long term solution.

[SergioGasquez]

We currently don't support x86_64-unknown-freebsd in rust-build, the repo where we build the Xtensa-enabled Rust toolchain and we`re not planning on adding this target due to the maintenance burden that would add.

Feel free to build the toolchain from source or use the Linux compatible layer.