pw_build_info/BUILD.bazel

# Copyright 2021 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.

load(
    "//pw_build:pigweed.bzl",
    "pw_cc_test",
)

package(default_visibility = ["//visibility:public"])

licenses(["notice"])

cc_library(
    name = "build_id_header",
    hdrs = [
        "public/pw_build_info/build_id.h",
        "public/pw_build_info/util.h",
    ],
    includes = ["public"],
    deps = [
        "//pw_span",
    ],
)

cc_library(
    name = "build_id",
    srcs = [
        "build_id.cc",
        "util.cc",
    ],
    # Automatically add the gnu build ID linker sections when building for
    # Linux. macOS and Windows executables are not supported, and embedded
    # targets must manually add the snippet to their linker script in a
    # read-only section.
    linkopts = select({
        # When building for Linux, the linker provides a default linker script.
        # The add_build_id_to_default_script.ld wrapper includes the
        # build_id_linker_snippet.ld script in a way that appends to the
        # default linker script instead of overriding it.
        "@platforms//os:linux": [
            "-T$(location add_build_id_to_default_linker_script.ld)",
        ],
        "//conditions:default": [],
    }) + [
        "-Lpw_build_info",
        "-Wl,--build-id=sha1",
    ],
    deps = select({
        "@platforms//os:linux": [
            ":add_build_id_to_default_linker_script.ld",
            ":build_id_linker_snippet.ld",
        ],
        "//conditions:default": [],
    }) + [
        ":build_id_header",
        "//pw_log",
        "//pw_preprocessor",
        "//pw_span",
        "//pw_string",
    ],
)

cc_library(
    name = "build_id_noop",
    srcs = [
        "build_id_noop.cc",
        "util.cc",
    ],
    deps = [
        ":build_id_header",
        "//pw_log",
        "//pw_span",
        "//pw_string",
    ],
)

cc_library(
    name = "build_id_or_noop",
    deps = select({
        "@platforms//os:windows": [":build_id_noop"],
        "@platforms//os:ios": [":build_id_noop"],
        "@platforms//os:macos": [":build_id_noop"],
        "//conditions:default": [":build_id"],
    }),
)

pw_cc_test(
    name = "build_id_test",
    srcs = ["build_id_test.cc"],
    # Only compatible with platforms that support linker scripts.
    target_compatible_with = select({
        "@platforms//os:macos": ["@platforms//:incompatible"],
        "@platforms//os:windows": ["@platforms//:incompatible"],
        "//conditions:default": [],
    }),
    deps = [
        ":build_id",
        "//pw_span",
        "//pw_unit_test",
    ],
)