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# Copyright 2023 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
"""Utilities for declaring Rust toolchains that are compatible with @bazel_embedded"""
load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
def pw_rust_toolchain(name, exec_cpu, exec_os, target_cpu, rust_target_triple, exec_triple):
proxy_toolchain = "@rust_{}_{}__{}__stable_tools".format(exec_os, exec_cpu, rust_target_triple)
rust_toolchain(
name = "{}_impl".format(name),
binary_ext = "",
dylib_ext = ".so",
exec_triple = exec_triple,
os = "none",
rust_doc = "{}//:rustdoc".format(proxy_toolchain),
rust_std = "{}//:rust_std-{}".format(proxy_toolchain, rust_target_triple),
rustc = "{}//:rustc".format(proxy_toolchain),
rustc_lib = "{}//:rustc_lib".format(proxy_toolchain),
staticlib_ext = ".a",
stdlib_linkflags = [],
target_triple = rust_target_triple,
)
native.toolchain(
name = name,
exec_compatible_with = [
"@platforms//cpu:{}".format(exec_cpu),
"@platforms//os:{}".format(exec_os),
],
target_compatible_with = [
"@platforms//cpu:{}".format(target_cpu),
"@bazel_embedded//constraints/fpu:none",
],
toolchain = ":{}_impl".format(name),
toolchain_type = "@rules_rust//rust:toolchain",
)
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