Document tier 3 platform support

[XAMPPRocky]

Tier 3 platforms

This is a tracking issue for adding documentation on the level of support a tier 3 Rust toolchain has. This is mainly "Can I use std on that platform?", "Can I build and run rustc on that platform?", and "Can I can build and run Cargo on that platform?".

• aarch64-unknown-freebsd
• aarch64-unknown-hermit
• aarch64-unknown-netbsd
• aarch64-unknown-none
• aarch64-unknown-redox
• aarch64-uwp-windows-msvc
• aarch64-wrs-vxworks
• armv4t-unknown-linux-gnueabi
• armv6-unknown-freebsd
• armv6-unknown-netbsd-eabihf
• armv7-unknown-freebsd
• armv7-unknown-netbsd-eabihf
• armv7-wrs-vxworks-eabihf
• hexagon-unknown-linux-musl
• i686-unknown-dragonfly
• i686-uwp-windows-gnu
• i686-uwp-windows-msvc
• i686-wrs-vxworks
• mips64-unknown-linux-muslabi64
• mips64el-unknown-linux-muslabi64
• mipsisa32r6-unknown-linux-gnu
• mipsisa32r6el-unknown-linux-gnu
• mipsisa64r6-unknown-linux-gnuabi64
• mipsisa64r6el-unknown-linux-gnuabi64
• powerpc-unknown-linux-musl
• powerpc-unknown-netbsd
• powerpc-wrs-vxworks
• powerpc-wrs-vxworks-spe
• powerpc64-unknown-freebsd
• powerpc64-unknown-linux-musl
• powerpc64-wrs-vxworks
• powerpc64le-unknown-linux-musl
• riscv32i-unknown-none-elf
• sparc64-unknown-openbsd
• thumbv7a-pc-windows-msvc
• wasm32-experimental-emscripten
• x86_64-pc-solaris
• x86_64-unknown-hermit
• x86_64-unknown-l4re-uclibc
• x86_64-unknown-uefi
• x86_64-wrs-vxworks

[jonas-schievink]

The thumbv8 targets are all shipped in rustup by the way, so they should probably be moved to tier 2

[XAMPPRocky]

@jonas-schievink Okay, do you want to create a seperate issue for that and I'll remove them from this list?

[jonas-schievink]

Yup, opened #346 for that

[flying-sheep]

avr-unknown-unknown has been enabled: rust-lang/rust#69478

[XAMPPRocky]

@flying-sheep Would you be willing to make a PR adding it?

[flying-sheep]

Actually I don’t even know what the checkmarks on the platform support page mean. That you can compile those things there? That there’s binary distributions of those things?

Also does something other than the platform support page need to be changed?

[yerke]

@XAMPPRocky Opened a draft #380

[XAMPPRocky]

@flying-sheep A check means that you can build and compile that component for that architecture and it will work. So if something has ticked std and rustc, it means you can build std and rustc but not cargo for that platform. It’s probably not the most clear currently.

[flying-sheep]

Hmm, “The columns below indicate whether the corresponding component works on the specified platform” is sufficient information, but yeah, I think a bit more clarification wouldn’t hurt.

[sajattack]

I noticed mipsel-sony-psp is missing from this list.