1# Copyright 2021 The Pigweed Authors 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); you may not 4# use this file except in compliance with the License. You may obtain a copy of 5# the License at 6# 7# https://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12# License for the specific language governing permissions and limitations under 13# the License. 14 15import("//build_overrides/pigweed.gni") 16 17import("$dir_pw_build/target_types.gni") 18import("$dir_pw_docgen/docs.gni") 19import("$dir_pw_unit_test/test.gni") 20 21config("linker_script") { 22 inputs = [ "build_id_linker_snippet.ld" ] 23 24 # Automatically add the gnu build ID linker sections when building for Linux. 25 # macOS and Windows executables are not supported, and embedded targets must 26 # manually add the snippet to their linker script in a read-only section. 27 if (current_os == "linux") { 28 # When building for Linux, the linker provides a default linker script. 29 # The add_build_id_to_default_script.ld wrapper includes the 30 # build_id_linker_snippet.ld script in a way that appends to the the 31 # default linker script instead of overriding it. 32 ldflags = [ 33 "-T", 34 rebase_path("add_build_id_to_default_linker_script.ld", root_build_dir), 35 ] 36 lib_dirs = [ "." ] 37 38 inputs += [ "add_build_id_to_default_linker_script.ld" ] 39 } 40 visibility = [ ":*" ] 41} 42 43config("gnu_build_id") { 44 ldflags = [ "-Wl,--build-id=sha1" ] 45} 46 47config("public_include_path") { 48 include_dirs = [ "public" ] 49 visibility = [ ":*" ] 50} 51 52# GNU build IDs aren't supported by Windows and macOS. 53if (current_os != "mac" && current_os != "win") { 54 pw_source_set("build_id") { 55 all_dependent_configs = [ 56 ":gnu_build_id", 57 ":linker_script", 58 ] 59 public_configs = [ ":public_include_path" ] 60 public = [ "public/pw_build_info/build_id.h" ] 61 sources = [ "build_id.cc" ] 62 deps = [ 63 dir_pw_preprocessor, 64 dir_pw_span, 65 ] 66 } 67} 68 69pw_doc_group("docs") { 70 sources = [ "docs.rst" ] 71 inputs = [ 72 "add_build_id_to_default_linker_script.ld", 73 "build_id_linker_snippet.ld", 74 ] 75} 76 77pw_test_group("tests") { 78 tests = [ ":build_id_test" ] 79} 80 81pw_test("build_id_test") { 82 enable_if = current_os == "linux" 83 deps = [ 84 ":build_id", 85 "$dir_pw_span", 86 ] 87 sources = [ "build_id_test.cc" ] 88} 89