build/bazel/toolchains/rust/rust.BUILD.bazel

# Copyright 2022 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Top level BUILD.bazel in the @fuchsia_rust_toolchain repository."""

load("@//:fuchsia_build_config.bzl", "build_config")
load("@rules_rust//rust:toolchain.bzl", "rust_stdlib_filegroup", "rust_toolchain")

host_os = build_config.host_os
host_arch = build_config.host_arch
host_triple = build_config.host_target_triple

filegroup(
    name = "rustc_lib",
    srcs = glob(["lib/*.so"]),
)

# Define the host Rust toolchain.

rust_stdlib_filegroup(
    name = "rust_std_host",
    srcs = glob(["lib/rustlib/%s/lib/*" % host_triple]),
)

rust_toolchain(
    name = "rust_%s_%s_toolchain" % (host_os, host_arch),
    rustc = "//:bin/rustc",
    rustc_lib = "//:rustc_lib",
    rust_std = "//:rust_std_host",
    rust_doc = "//:bin/rustdoc",
    binary_ext = "",
    staticlib_ext = ".a",
    dylib_ext = ".so",
    stdlib_linkflags = ["-lpthread", "-ldl"],
    os = "linux",
    exec_triple = host_triple,  # e.g. "x86_64-unknown-linux-gnu",
    target_triple = host_triple,  # e.g. "x86_64-unknown-linux-gnu",
)

toolchain(
    name = "rust_%s_%s" % (host_os, host_arch),
    exec_compatible_with = [
        build_config.host_platform_cpu_constraint,
        build_config.host_platform_os_constraint,
    ],
    target_compatible_with = [
        build_config.host_platform_cpu_constraint,  # e.g. "@platforms//cpu:x86_64",
        build_config.host_platform_os_constraint,  # e.g. "@platforms//os:linux",
    ],
    toolchain = ":rust_%s_%s_toolchain" % (host_os, host_arch),
    toolchain_type = "@rules_rust//rust:toolchain",
)

# Define the Fuchsia/x64 Rust toolchain

rust_stdlib_filegroup(
    name = "rust_std_fuchsia_x64",
    srcs = glob(["lib/rustlib/x86_64-fuchsia/lib/*"]),
)

rust_toolchain(
    name = "rust_fuchsia_x64_toolchain",
    rustc = "//:bin/rustc",
    rustc_lib = "//:rustc_lib",
    rust_std = "//:rust_std_fuchsia_x64",
    rust_doc = "//:bin/rustdoc",
    binary_ext = "",
    staticlib_ext = ".a",
    dylib_ext = ".so",
    stdlib_linkflags = [],
    os = "fuchsia",
    exec_triple = "x86_64-unknown-fuchsia",
    target_triple = "x86_64-fuchsia",
)

toolchain(
    name = "rust_fuchsia_x64",
    exec_compatible_with = [
        build_config.host_platform_cpu_constraint,
        build_config.host_platform_os_constraint,
    ],
    target_compatible_with = [
        "@platforms//cpu:x86_64",
        "@platforms//os:fuchsia",
    ],
    toolchain = ":rust_fuchsia_x64_toolchain",
    toolchain_type = "@rules_rust//rust:toolchain",
)

# Define the Fuchsia/arm64 Rust toolchain

rust_stdlib_filegroup(
    name = "rust_std_fuchsia_arm64",
    srcs = glob(["lib/rustlib/aarch64-fuchsia/lib/*"]),
)

rust_toolchain(
    name = "rust_fuchsia_arm64_toolchain",
    rustc = "//:bin/rustc",
    rustc_lib = "//:rustc_lib",
    rust_std = "//:rust_std_fuchsia_arm64",
    rust_doc = "//:bin/rustdoc",
    binary_ext = "",
    staticlib_ext = ".a",
    dylib_ext = ".so",
    stdlib_linkflags = [],
    os = "fuchsia",
    exec_triple = "aarch64-unknown-fuchsia",
    target_triple = "aarch64-fuchsia",
)

toolchain(
    name = "rust_fuchsia_arm64",
    exec_compatible_with = [
        build_config.host_platform_cpu_constraint,
        build_config.host_platform_os_constraint,
    ],
    target_compatible_with = [
        "@platforms//cpu:aarch64",
        "@platforms//os:fuchsia",
    ],
    toolchain = ":rust_fuchsia_arm64_toolchain",
    toolchain_type = "@rules_rust//rust:toolchain",
)