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") 19 20config("linker_script") { 21 inputs = [ "build_id_linker_snippet.ld" ] 22 23 # Automatically add the gnu build ID linker sections when building for Linux. 24 # macOS and Windows executables are not supported, and embedded targets must 25 # manually add the snippet to their linker script in a read-only section. 26 if (current_os == "linux") { 27 # When building for Linux, the linker provides a default linker script. 28 # The add_build_id_to_default_script.ld wrapper includes the 29 # build_id_linker_snippet.ld script in a way that appends to the the 30 # default linker script instead of overriding it. 31 ldflags = [ 32 "-T", 33 rebase_path("add_build_id_to_default_script.ld", root_build_dir), 34 ] 35 lib_dirs = [ "." ] 36 37 inputs += [ "add_build_id_to_default_script.ld" ] 38 } 39 visibility = [ ":*" ] 40} 41 42config("gnu_build_id") { 43 ldflags = [ "-Wl,--build-id=sha1" ] 44} 45 46config("public_include_path") { 47 include_dirs = [ "public" ] 48 visibility = [ ":*" ] 49} 50 51# GNU build IDs aren't supported by Windows and macOS. 52if (current_os != "mac" && current_os != "win") { 53 pw_source_set("build_id") { 54 all_dependent_configs = [ 55 ":gnu_build_id", 56 ":linker_script", 57 ] 58 public_configs = [ ":public_include_path" ] 59 cflags = [ 60 "-Wno-array-bounds", 61 "-Wno-stringop-overflow", 62 ] 63 public = [ "public/pw_build_info/build_id.h" ] 64 sources = [ "build_id.cc" ] 65 deps = [ dir_pw_preprocessor ] 66 } 67} 68 69pw_doc_group("docs") { 70 sources = [ "docs.rst" ] 71 inputs = [ "build_id_linker_snippet.ld" ] 72} 73