1# Copyright 2020 The Chromium Authors. All rights reserved. 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5# This file contains the definition of the template absl_source_set which 6# should be the only type of target needed in abseil's BUILD.gn files. 7# This template will correctly set "configs" and "public_configs" in order 8# to correctly compile abseil in Chromium. 9# 10# Usage: 11# Most of the times its usage will be similar to the example below but all 12# the arguments avilable in source_set are also available for absl_source_set. 13# 14# absl_source_set("foo") { 15# sources = [ "foo.cc" ] 16# public = [ "foo.h" ] 17# deps = [ ":bar" ] 18# } 19 20import("//build_overrides/build.gni") 21 22template("absl_source_set") { 23 source_set(target_name) { 24 forward_variables_from(invoker, "*") 25 configs -= [ "//build/config/compiler:chromium_code" ] 26 configs += [ 27 "//build/config/compiler:no_chromium_code", 28 "//third_party/abseil-cpp:absl_default_cflags_cc", 29 "//third_party/abseil-cpp:absl_define_config", 30 ] 31 32 if (is_component_build) { 33 defines = [ "ABSL_BUILD_DLL" ] 34 if (!is_win) { 35 configs -= [ "//build/config/gcc:symbol_visibility_hidden" ] 36 configs += [ "//build/config/gcc:symbol_visibility_default" ] 37 } 38 } 39 40 if (!defined(public_configs)) { 41 public_configs = [] 42 } 43 public_configs += [ "//third_party/abseil-cpp:absl_include_config" ] 44 45 if (!defined(visibility)) { 46 # Within Chromium builds, restrict direct visibility of Abseil sources, so 47 # users must depend on //third_party/abseil-cpp:absl. This prevents use of 48 # banned targets like absl/types:any. A few targets require exceptions. 49 # TODO(crbug.com/1096380): Consider replacing build_with_chromium with 50 # is_component_build for a narrower, more accurate condition. 51 if (build_with_chromium) { 52 visibility = [ 53 # Abseil itself. 54 "//third_party/abseil-cpp/*", 55 56 # GTest. It unconditionally #includes any.h if pretty-print support 57 # for absl types is enabled. 58 "//third_party/googletest/*", 59 60 # WebRTC binary to run PSNR and SSIM video quality analysis. It 61 # statically links absl and it is used by "browser_tests" when 62 # is_component_build=false but it cannot depend on the absl 63 # component because it uses absl/flags. 64 "//third_party/webrtc/rtc_tools:frame_analyzer", 65 66 # WebRTC binaries used by //:chromium_builder_asan. They both 67 # statically link absl (because they depend on absl/flags) and are 68 # used by Chromium only when is_component_build=false. 69 "//third_party/webrtc/rtc_tools:rtp_generator", 70 "//third_party/webrtc/rtc_tools:video_replay", 71 72 # Not used by Chromium directly. 73 "//chromecast/internal/*", 74 "//libassistant/*", 75 ] 76 } else { 77 visibility = [ "*" ] 78 } 79 } 80 } 81} 82