examples/musl_cross_compiling/WORKSPACE.bazel

local_repository(
    name = "rules_rust",
    path = "../..",
)

load("@rules_rust//rust:repositories.bzl", "rules_rust_dependencies", "rust_register_toolchains", "rust_repository_set")

rules_rust_dependencies()

EDITION = "2021"

# Before 1.80.0, proc macros couldn't be used when exec!=target where exec and target platforms use different shared library extension (i.e. so vs dylib) because of an error in rustc's handling of extensions.
RUST_VERSION = "1.80.0"

rust_register_toolchains(
    edition = EDITION,
)

rust_repository_set(
    name = "darwin_x86_64_to_x86_64_musl_tuple",
    edition = EDITION,
    exec_triple = "x86_64-apple-darwin",
    # Setting this extra_target_triples allows differentiating the musl case from the non-musl case, in case multiple linux-targeting toolchains are registered.
    extra_target_triples = {"x86_64-unknown-linux-musl": [
        "@//linker_config:musl",
        "@platforms//cpu:x86_64",
        "@platforms//os:linux",
    ]},
    versions = [RUST_VERSION],
)

rust_repository_set(
    name = "darwin_arm64_to_x86_64_musl_tuple",
    edition = EDITION,
    exec_triple = "aarch64-apple-darwin",
    extra_target_triples = {"x86_64-unknown-linux-musl": [
        "@//linker_config:musl",
        "@platforms//cpu:x86_64",
        "@platforms//os:linux",
    ]},
    versions = [RUST_VERSION],
)

rust_repository_set(
    name = "darwin_x86_64_to_arm64_musl_tuple",
    edition = EDITION,
    exec_triple = "x86_64-apple-darwin",
    # Setting this extra_target_triples allows differentiating the musl case from the non-musl case, in case multiple linux-targeting toolchains are registered.
    extra_target_triples = {"aarch64-unknown-linux-musl": [
        "@//linker_config:musl",
        "@platforms//cpu:arm64",
        "@platforms//os:linux",
    ]},
    versions = [RUST_VERSION],
)

rust_repository_set(
    name = "darwin_arm64_to_arm64_musl_tuple",
    edition = EDITION,
    exec_triple = "aarch64-apple-darwin",
    extra_target_triples = {"aarch64-unknown-linux-musl": [
        "@//linker_config:musl",
        "@platforms//cpu:arm64",
        "@platforms//os:linux",
    ]},
    versions = [RUST_VERSION],
)

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "aspect_bazel_lib",
    sha256 = "f5ea76682b209cc0bd90d0f5a3b26d2f7a6a2885f0c5f615e72913f4805dbb0d",
    strip_prefix = "bazel-lib-2.5.0",
    url = "https://github.com/aspect-build/bazel-lib/releases/download/v2.5.0/bazel-lib-v2.5.0.tar.gz",
)

load("@aspect_bazel_lib//lib:repositories.bzl", "aspect_bazel_lib_dependencies", "aspect_bazel_lib_register_toolchains")

aspect_bazel_lib_dependencies()

aspect_bazel_lib_register_toolchains()

http_archive(
    name = "musl_toolchains",
    sha256 = "1e6cf99f35277dbb9c3b341a9986d0f33cf70e0cc76a58f062d2d9b7ab56eeeb",
    url = "https://github.com/bazel-contrib/musl-toolchain/releases/download/v0.1.17/musl_toolchain-v0.1.17.tar.gz",
)

load("@musl_toolchains//:repositories.bzl", "load_musl_toolchains")

# Setting this extra_target_triples allows differentiating the musl case from the non-musl case, in case multiple linux-targeting toolchains are registered.
load_musl_toolchains(extra_target_compatible_with = ["@//linker_config:musl"])

load("@musl_toolchains//:toolchains.bzl", "register_musl_toolchains")

register_musl_toolchains()

load("@rules_rust//crate_universe:repositories.bzl", "crate_universe_dependencies")

crate_universe_dependencies(bootstrap = True)

load("@rules_rust//crate_universe:defs.bzl", "crate", "crates_repository")

crates_repository(
    name = "cu",
    cargo_lockfile = "//:Cargo.Bazel.lock",
    # `generator` is not necessary in official releases.
    # See load statement for `cargo_bazel_bootstrap`.
    generator = "@cargo_bazel_bootstrap//:cargo-bazel",
    lockfile = "//:Cargo.Bazel.lock.json",
    packages = {
        # This package has a platform-specific dependency on zbus, which depends on the derivative proc-macro.
        # This is here to ensure feature resolution works even if exec != target.
        "keyring": crate.spec(
            version = "=2.3.3",
        ),
        # If we just to top-level per-platform resolves, we end up with platform-specific features on this crate, such that the `visit` feature is only enabled on Linux.
        # This causes problems when cross-compiling and using this crate from a proc-macro, because we compile the proc-macro against syn with features resolved for the wrong platform.
        "syn": crate.spec(
            version = "=1.0.109",
        ),
    },
)

load("@cu//:defs.bzl", "crate_repositories")

crate_repositories()