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# Copyright 2020 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# This file contains the definition of the template absl_source_set which
# should be the only type of target needed in abseil's BUILD.gn files.
# This template will correctly set "configs" and "public_configs" in order
# to correctly compile abseil in Chromium.
#
# Usage:
# Most of the times its usage will be similar to the example below but all
# the arguments avilable in source_set are also available for absl_source_set.
#
# absl_source_set("foo") {
# sources = [ "foo.cc" ]
# public = [ "foo.h" ]
# deps = [ ":bar" ]
# }
import("//build_overrides/build.gni")
declare_args() {
absl_build_tests = build_with_chromium
moz_webrtc_build = true
}
template("absl_source_set") {
source_set(target_name) {
if (defined(invoker.testonly) && invoker.testonly && !absl_build_tests) {
not_needed(invoker, "*")
} else {
forward_variables_from(invoker, "*")
configs -= [ "//chromium/build/config/compiler:chromium_code" ]
configs += [
"//chromium/build/config/compiler:no_chromium_code",
"//chromium/build/config/compiler:prevent_unsafe_narrowing",
"//abseil-cpp:absl_default_cflags_cc",
"//abseil-cpp:absl_define_config",
]
if (moz_webrtc_build) {
configs -= [ "//chromium/build/config/compiler:prevent_unsafe_narrowing" ]
}
if (!defined(defines)) {
defines = []
}
if (is_component_build) {
defines += [ "ABSL_BUILD_DLL" ]
if (!is_win && current_os != "aix") {
configs -= [ "//chromium/build/config/gcc:symbol_visibility_hidden" ]
configs += [ "//chromium/build/config/gcc:symbol_visibility_default" ]
}
}
if (!defined(public_configs)) {
public_configs = []
}
public_configs += [ "//abseil-cpp:absl_include_config" ]
if (!defined(visibility)) {
# Within Chromium builds, restrict direct visibility of Abseil sources, so
# users must depend on //third_party/abseil-cpp:absl. This prevents use of
# banned targets like absl/types:any. A few targets require exceptions.
if (build_with_chromium) {
visibility = [
# Abseil itself.
"//third_party/abseil-cpp/*",
# GTest. It unconditionally #includes any.h if pretty-print support
# for absl types is enabled.
"//third_party/googletest/*",
]
if (!is_component_build) {
visibility += [
# Not used by Chromium directly.
"//chromecast/internal/*",
"//libassistant/*",
]
}
} else {
visibility = [ "*" ]
}
}
visibility += [ "//abseil-cpp/*" ]
# Now that abseil-cpp lives under Mozilla's third_party instead
# of under libwebrtc's third_party and is built as a stand-alone
# library, we need to "re-root" the dependency paths. We can
# modify the dependencies here to avoid modifying most, if not
# all, of the BUILD.gn files.
if (defined(deps)) {
modified_deps = []
foreach (dep, deps) {
newdep = string_replace(dep, "//third_party/abseil-cpp/", "//")
newdep = string_replace(newdep, "//build", "//chromium/build")
modified_deps += [ newdep ]
}
deps = []
deps = modified_deps
}
# Same for public_deps
if (defined(public_deps)) {
modified_deps = []
foreach (dep, public_deps) {
newdep = string_replace(dep, "//third_party/abseil-cpp/", "//")
modified_deps += [ newdep ]
}
public_deps = []
public_deps = modified_deps
}
# Same for visibility
if (defined(visibility)) {
modified_deps = []
foreach (dep, visibility) {
newdep = string_replace(dep, "//third_party/abseil-cpp/", "//")
modified_deps += [ newdep ]
}
visibility = []
visibility = modified_deps
}
}
}
}
template("absl_test") {
source_set(target_name) {
if (!absl_build_tests) {
not_needed(invoker, "*")
} else {
forward_variables_from(invoker, "*")
testonly = true
configs -= [ "//chromium/build/config/compiler:chromium_code" ]
configs += [
"//chromium/build/config/compiler:no_chromium_code",
"//abseil-cpp:absl_default_cflags_cc",
"//abseil-cpp:absl_define_config",
"//abseil-cpp:absl_test_config",
]
if (!defined(public_configs)) {
public_configs = []
}
public_configs += [ "//abseil-cpp:absl_include_config" ]
visibility = [ "//third_party/abseil-cpp/:*" ]
deps += [
"//third_party/googletest:gmock",
"//third_party/googletest:gtest",
]
}
# Now that abseil-cpp lives under Mozilla's third_party instead
# of under libwebrtc's third_party and is built as a stand-alone
# library, we need to "re-root" the dependency paths. We can
# modify the dependencies here to avoid modifying most, if not
# all, of the BUILD.gn files.
if (defined(deps)) {
modified_deps = []
foreach (dep, deps) {
newdep = string_replace(dep, "//third_party/abseil-cpp/", "//")
modified_deps += [ newdep ]
}
deps = []
deps = modified_deps
}
}
}
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