No matching toolchains found for types @io_bazel_rules_go//go:toolchain

[Boring545]

I am attempting to use rules_go and Bazel to compile a Go program on an operating system with a RISC-V CPU architecture, and I want to use the locally installed Go to compile the example project in rules_go. Unfortunately, when I tried running the test program, I encountered the following issue:

[zjq@openeuler-riscv-4-4 basic-gazelle]$ bazel run //:basic-gazelle --@io_bazel_rules_go//go/toolchain:sdk_version="host"
INFO: Build options --@io_bazel_rules_go//go/toolchain:sdk_version and --toolchain_resolution_debug have changed, discarding analysis cache.
ERROR: /home/zjq/bazel_test/rules_go/examples/basic-gazelle/BUILD.bazel:29:10: While resolving toolchains for target //:basic-gazelle: No matching toolchains found for types @io_bazel_rules_go//go:toolchain.
To debug, rerun with --toolchain_resolution_debug='@io_bazel_rules_go//go:toolchain'
If platforms or toolchains are a new concept for you, we'd encourage reading https://bazel.build/concepts/platforms-intro.
ERROR: Analysis of target '//:basic-gazelle' failed; build aborted:
INFO: Elapsed time: 12.347s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (0 packages loaded, 212 targets configured)
ERROR: Build failed. Not running target

After investigating related issues, I found one that closely matches my problem: issue. It was resolved by adding the parameter "ppc64": "@platforms//cpu:ppc" to BAZEL_GOARCH_CONSTRAINTS in rules_go/go/private/platforms.bzl. Should I do something similar, such as adding "riscv64": "@platforms//cpu:riscv64"?

I also ran the command bazel run //:basic-gazelle --toolchain_resolution_debug='.*', and the output showed:

INFO: ToolchainResolution: Type @io_bazel_rules_go//go:toolchain: target platform @local_config_platform//:host: Rejected toolchain @go_sdk//:go_linux_riscv64-impl; mismatching values: riscv64.

Additionally, please note that I have set go_register_toolchains(go_version = "host") in the WORKSPACE file.

[Boring545]

I successfully ran the example program using the command: bazel run //:basic-gazelle --host_platform="@io_bazel_rules_go//go/toolchain:linux_riscv64" --platforms="@io_bazel_rules_go//go/toolchain:linux_riscv64".

[fmeum]

Yes, feel free to send a PR adding a new entry to that dictionary.