load("@no_std_crate_index//:defs.bzl", "aliases", "all_crate_deps")
load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
load(
    "@rules_rust//rust:defs.bzl",
    "rust_binary",
    "rust_library",
    "rust_shared_library",
)

rust_shared_library(
    name = "lib",
    srcs = [
        "lib.rs",
        "no_std.rs",
    ],
    crate_features = select({
        "@rules_rust//:is_no_std": [],
        "//conditions:default": ["std"],
    }),
    edition = "2021",
    deps = ["custom_alloc"],
)

rust_library(
    name = "custom_alloc",
    srcs = ["alloc.rs"],
    aliases = aliases(),
    deps = all_crate_deps(normal = True),
)

cc_library(
    name = "nostartfiles",
    linkopts = ["-nostartfiles"],
)

rust_binary(
    name = "main",
    srcs = ["main.rs"],
    aliases = aliases(),
    deps = all_crate_deps(normal = True) + [":nostartfiles"],
)

cc_test(
    name = "no_std_cc_test",
    srcs = ["main.c"],
    deps = [":lib"],
)