## A Survey of Tier 2 Target Maintainers Status

Last revised: **2025-07-14**.

### Status of Tier 2 with host tools targets

Note: when a platform support page is absent, it is assumed that the target do not have any target maintainers.

| Target tuple | Target maintainers count | Platform support page |
| -------------------------------- | ------------------------ | -------------------------------------------------------------------------------------------- |
| `aarch64-pc-windows-gnullvm` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/windows-gnullvm.html |
| `aarch64-pc-windows-msvc` | 5 | https://doc.rust-lang.org/nightly/rustc/platform-support/windows-msvc.html |
| `aarch64-unknown-linux-musl` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/aarch64-unknown-linux-musl.html |
| `aarch64-unknown-linux-ohos` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/openharmony.html |
| `arm-unknown-linux-gnueabi` | 0 | N/A |
| `arm-unknown-linux-gnueabihf` | 0 | N/A |
| `armv7-unknown-linux-gnueabihf` | 0 | N/A |
| `armv7-unknown-linux-ohos` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/openharmony.html |
| `loongarch64-unknown-linux-gnu` | 4 | https://doc.rust-lang.org/nightly/rustc/platform-support/loongarch-linux.html |
| `loongarch64-unknown-linux-musl` | 4 | https://doc.rust-lang.org/nightly/rustc/platform-support/loongarch-linux.html |
| `i686-pc-windows-gnu` | 0 | https://doc.rust-lang.org/nightly/rustc/platform-support/windows-gnu.html |
| `powerpc-unknown-linux-gnu` | 0 | N/A |
| `powerpc64-unknown-linux-gnu` | 0 | N/A |
| `powerpc64le-unknown-linux-gnu` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc64le-unknown-linux-gnu.html |
| `powerpc64le-unknown-linux-musl` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc64le-unknown-linux-musl.html |
| `riscv64gc-unknown-linux-gnu` | 4 | https://doc.rust-lang.org/nightly/rustc/platform-support/riscv64gc-unknown-linux-gnu.html |
| `riscv64gc-unknown-linux-musl` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/riscv64gc-unknown-linux-musl.html |
| `s390x-unknown-linux-gnu` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/s390x-unknown-linux-gnu.html |
| `x86_64-pc-windows-gnullvm` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/windows-gnullvm.html |
| `x86_64-unknown-freebsd` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/freebsd.html |
| `x86_64-unknown-illumos` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/illumos.html |
| `x86_64-unknown-linux-musl` | 0 | N/A |
| `x86_64-unknown-linux-ohos` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/openharmony.html |
| `x86_64-unknown-netbsd` | 1 | https://doc.rust-lang.org/nightly/rustc/platform-support/netbsd.html |
| `x86_64-pc-solaris` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/solaris.html |
| `sparcv9-sun-solaris` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/solaris.html |

#### Tier 2 with host tools targets with no platform support pages or explicit target maintainers

- `arm-unknown-linux-gnueabi`
- `arm-unknown-linux-gnueabihf`
- `armv7-unknown-linux-gnueabihf`
- `i686-pc-windows-gnu`
- `powerpc-unknown-linux-gnu`
- `powerpc64-unknown-linux-gnu`
- `x86_64-unknown-linux-musl`

#### Tier 2 with host tools targets with only 1 explicit target maintainers

- `x86_64-unknown-netbsd`
- Note that there is a *primary* target maintainer who serves as point of contact, but there are fallback target maintainers, so this seems fine.

### Status of Tier 2 without host tools targets

Note: when a platform support page is absent, it is assumed that the target do not have any target maintainers.

| Target tuple | Target maintainers count | Platform support page |
| ------------------------------------- | --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `aarch64-apple-ios` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/apple-ios.html |
| `aarch64-apple-ios-macabi` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/apple-ios-macabi.html |
| `aarch64-apple-ios-sim` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/apple-ios.html |
| `aarch64-linux-android` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/android.html |
| `aarch64-unknown-fuchsia` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/fuchsia.html |
| `aarch64-unknown-none` | 0 | N/A |
| `aarch64-unknown-none-softfloat` | 0 | N/A |
| `aarch64-unknown-uefi` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/unknown-uefi.html |
| `arm-linux-androideabi` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/android.html |
| `arm-unknown-linux-musleabi` | 0 | N/A |
| `arm-unknown-linux-musleabihf` | 0 | N/A |
| `arm64ec-pc-windows-msvc` | 1 | https://doc.rust-lang.org/nightly/rustc/platform-support/arm64ec-pc-windows-msvc.html |
| `armebv7r-none-eabi` | 1 | https://doc.rust-lang.org/nightly/rustc/platform-support/armv7r-none-eabi.html |
| `armebv7r-none-eabihf` | 1 | https://doc.rust-lang.org/nightly/rustc/platform-support/armv7r-none-eabi.html |
| `armv5te-unknown-linux-gnueabi` | 0 | https://doc.rust-lang.org/nightly/rustc/platform-support/armv5te-unknown-linux-gnueabi.html |
| `armv5te-unknown-linux-musleabi` | 0 | N/A |
| `armv7-linux-androideabi` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/android.html |
| `armv7-unknown-linux-gnueabi` | 0 | N/A |
| `armv7-unknown-linux-musleabi` | 0 | N/A |
| `armv7-unknown-linux-musleabihf` | 0 | N/A |
| `armv7a-none-eabi` | 0 | There's an overarching page https://doc.rust-lang.org/nightly/rustc/platform-support/arm-none-eabi.html but no explicit target maintainer page for `armv7a-none-eabi` |
| `armv7r-none-eabi` | 1 | https://doc.rust-lang.org/nightly/rustc/platform-support/armv7r-none-eabi.html |
| `i586-unknown-linux-gnu` | 0 | N/A |
| `i586-unknown-linux-musl` | 0 | N/A |
| `i686-linux-android` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/android.html |
| `i686-pc-windows-gnullvm` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/windows-gnullvm.html |
| `i686-unknown-freebsd` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/freebsd.html |
| `i686-unknown-linux-musl` | 0 | N/A |
| `i686-unknown-uefi` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/unknown-uefi.html |
| `loongarch64-unknown-none` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/loongarch-none.html |
| `loongarch64-unknown-none-softfloat` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/loongarch-none.html |
| `nvptx64-nvidia-cuda` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/nvptx64-nvidia-cuda.html |
| `riscv32i-unknown-none-elf` | 6 (WG-embedded RISC-V team) | https://doc.rust-lang.org/nightly/rustc/platform-support/riscv32-unknown-none-elf.html |
| `riscv32im-unknown-none-elf` | 6 (WG-embedded RISC-V team) | https://doc.rust-lang.org/nightly/rustc/platform-support/riscv32-unknown-none-elf.html |
| `riscv32imac-unknown-none-elf ` | 6 (WG-embedded RISC-V team) | https://doc.rust-lang.org/nightly/rustc/platform-support/riscv32-unknown-none-elf.html |
| `riscv32imafc-unknown-none-elf` | 6 (WG-embedded RISC-V team) | https://doc.rust-lang.org/nightly/rustc/platform-support/riscv32-unknown-none-elf.html |
| `riscv32imc-unknown-none-elf` | 6 (WG-embedded RISC-V team) | https://doc.rust-lang.org/nightly/rustc/platform-support/riscv32-unknown-none-elf.html |
| `riscv64gc-unknown-none-elf` | 0 | N/A |
| `riscv64imac-unknown-none-elf` | 0 | N/A |
| `sparc64-unknown-linux-gnu` | 0 | N/A |
| `thumbv6m-none-eabi` | 10 (WG-embedded ARM team) | https://doc.rust-lang.org/nightly/rustc/platform-support/thumbv6m-none-eabi.html |
| `thumbv7em-none-eabi` | 10 (WG-embedded ARM team) | https://doc.rust-lang.org/nightly/rustc/platform-support/thumbv7em-none-eabi.html |
| `thumbv7em-none-eabihf` | 10 (WG-embedded ARM team) | https://doc.rust-lang.org/nightly/rustc/platform-support/thumbv7em-none-eabi.html |
| `thumbv7m-none-eabi` | 10 (WG-embedded ARM team) | https://doc.rust-lang.org/nightly/rustc/platform-support/thumbv7m-none-eabi.html |
| `thumbv7neon-linux-androideabi` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/android.html |
| `thumbv7neon-unknown-linux-gnueabihf` | 0 | N/A |
| `thumbv8m.base-none-eabi` | 10 (WG-embedded ARM team) | https://doc.rust-lang.org/nightly/rustc/platform-support/thumbv8m.base-none-eabi.html |
| `thumbv8m.main-none-eabi` | 10 (WG-embedded ARM team) | https://doc.rust-lang.org/nightly/rustc/platform-support/thumbv8m.main-none-eabi.html |
| `thumbv8m.main-none-eabihf` | 10 (WG-embedded ARM team) | https://doc.rust-lang.org/nightly/rustc/platform-support/thumbv8m.main-none-eabi.html |
| `wasm32-unknown-emscripten` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/wasm32-unknown-emscripten.html |
| `wasm32-unknown-unknown` | 1 | https://doc.rust-lang.org/nightly/rustc/platform-support/wasm32-unknown-unknown.html |
| `wasm32-wasip1` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/wasm32-wasip1.html |
| `wasm32-wasip1-threads` | 4 | https://doc.rust-lang.org/nightly/rustc/platform-support/wasm32-wasip1-threads.html |
| `wasm32-wasip2` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/wasm32-wasip2.html |
| `wasm32v1-none` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/wasm32v1-none.html |
| `x86_64-apple-ios` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/apple-ios.html |
| `x86_64-apple-ios-macabi` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/apple-ios-macabi.html |
| `x86_64-fortanix-unknown-sgx` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/x86_64-fortanix-unknown-sgx.html |
| `x86_64-linux-android` | 3 | https://doc.rust-lang.org/nightly/rustc/platform-support/android.html |
| `x86_64-unknown-fuchsia` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/fuchsia.html |
| `x86_64-unknown-linux-gnux32` | 0 | N/A |
| `x86_64-unknown-none` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/x86_64-unknown-none.html |
| `x86_64-unknown-redox` | 1 | https://doc.rust-lang.org/nightly/rustc/platform-support.html |
| `x86_64-unknown-uefi` | 2 | https://doc.rust-lang.org/nightly/rustc/platform-support/unknown-uefi.html |

#### Tier 2 without host tools targets with no platform support pages or explicit target maintainers

- `aarch64-unknown-none`
- `aarch64-unknown-none-softfloat`
- `arm-unknown-linux-musleabi`
- `arm-unknown-linux-musleabihf`
- `armv5te-unknown-linux-gnueabi`
- `armv5te-unknown-linux-musleabi`
- `armv7-unknown-linux-gnueabi`
- `armv7-unknown-linux-musleabi`
- `armv7-unknown-linux-musleabihf`
- `armv7a-none-eabi`
- `i586-unknown-linux-gnu`
- `i586-unknown-linux-musl`
- `i686-unknown-linux-musl`
- `riscv64gc-unknown-none-elf`
- `riscv64imac-unknown-none-elf`
- `sparc64-unknown-linux-gnu`
- `thumbv7neon-unknown-linux-gnueabihf`
- `x86_64-unknown-linux-gnux32`

#### Tier 2 without host tools targets with only 1 explicit target maintainers

- `arm64ec-pc-windows-msvc`
- `armebv7r-none-eabi`
- `armebv7r-none-eabihf`
- `armv7r-none-eabi`
- `wasm32-unknown-unknown`
- `x86_64-unknown-redox`

[t2-target-policy]: https://doc.rust-lang.org/rustc/target-tier-policy.html#tier-2-target-policy
[platform-support]: https://doc.rust-lang.org/nightly/rustc/platform-support.html