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Auto merge of #148435 - ZhongyaoChen:promote-riscv64a23-to-tier2, r=jieyouxu

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Implement the MCP 932: Promote riscv64a23-unknown-linux-gnu to Tier 2

Implement the [MCP 932](https://github.com/rust-lang/compiler-team/issues/932): Promote riscv64a23-unknown-linux-gnu to Tier 2 without host tools.

Closes rust-lang/rust#148353.

Changes:
- Update target tier from 3 to 2 in target specification
- Update platform documentation
- Add CI/CD support for automatic building and distribution via rustup

r? jieyouxu
cc `@davidtwco` `@Noratrieb`
This commit is contained in:
bors
2025-11-09 19:57:56 +00:00
parent 86b95ebc24 1af9b63c7b
commit 6647be9364
3 changed files with 19 additions and 13 deletions
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compiler/rustc_target/src/spec/targets/riscv64a23_unknown_linux_gnu.rs
+2 -2
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@@ -7,8 +7,8 @@ pub(crate) fn target() -> Target {
llvm_target: "riscv64-unknown-linux-gnu".into(),
metadata: TargetMetadata {
description: Some("RISC-V Linux (kernel 6.8.0, glibc 2.39)".into()),
tier: Some(3),
host_tools: Some(true),
tier: Some(2),
host_tools: Some(false),
std: Some(true),
},
pointer_width: 64,
src/ci/docker/host-x86_64/dist-riscv64-linux/Dockerfile
+6 -2
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@@ -22,9 +22,13 @@ ENV PATH=$PATH:/x-tools/riscv64-unknown-linux-gnu/bin
ENV CC_riscv64gc_unknown_linux_gnu=riscv64-unknown-linux-gnu-gcc \
AR_riscv64gc_unknown_linux_gnu=riscv64-unknown-linux-gnu-ar \
CXX_riscv64gc_unknown_linux_gnu=riscv64-unknown-linux-gnu-g++
CXX_riscv64gc_unknown_linux_gnu=riscv64-unknown-linux-gnu-g++ \
CC_riscv64a23_unknown_linux_gnu=riscv64-unknown-linux-gnu-gcc \
AR_riscv64a23_unknown_linux_gnu=riscv64-unknown-linux-gnu-ar \
CXX_riscv64a23_unknown_linux_gnu=riscv64-unknown-linux-gnu-g++
ENV HOSTS=riscv64gc-unknown-linux-gnu
ENV TARGETS=riscv64gc-unknown-linux-gnu,riscv64a23-unknown-linux-gnu
ENV RUST_CONFIGURE_ARGS --enable-extended --enable-profiler --disable-docs
ENV SCRIPT python3 ../x.py dist --target $HOSTS --host $HOSTS
ENV SCRIPT python3 ../x.py dist --target $TARGETS --host $HOSTS
src/doc/rustc/src/platform-support/riscv64a23-unknown-linux-gnu.md
+11 -9
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@@ -1,6 +1,6 @@
# `riscv64a23-unknown-linux-gnu`
**Tier: 3**
**Tier: 2 (without Host Tools)**
RISC-V target using the ratified [RVA23 Profile](https://github.com/riscv/riscv-profiles/blob/main/src/rva23-profile.adoc).
This target will enable all mandary features of rva23u64 by default.
@@ -18,24 +18,26 @@ Other platforms may work, but are not tested. Please contanct if you encounter a
## Building the target
Tier-3 target is not distributed through `rustup`.
You need to build your own Rust, the target can be build with:
Tier-2 targets are distributed through `rustup`. Install the target with:
```bash
./x build --target riscv64a23-unknown-linux-gnu
rustup target add riscv64a23-unknown-linux-gnu
```
## Building Rust programs
Add the toolchain:
Cross compile crates with:
```bash
rustup toolchain link rva23-toolchain {path-to-rust}/build/host/stage2
cargo build --target=riscv64a23-unknown-linux-gnu
```
Then cross compile crates with:
For cross-compilation, you may need to install the appropriate linker:
```bash
RUSTFLAGS="-C linker=riscv64-linux-gnu-gcc" cargo +rva23-toolchain build --target=riscv64a23-unknown-linux-gnu
# Ubuntu/Debian
sudo apt-get install gcc-riscv64-linux-gnu
# Then set the linker
RUSTFLAGS="-C linker=riscv64-linux-gnu-gcc" cargo build --target=riscv64a23-unknown-linux-gnu
```