Add initial chromium compile support

This change updates various BUILD.gn files to work in both standalone
builds and Chromium builds.  There are several main changes that have to
take place:

 1. Change abseil include paths so we can use any abseil location.
 2. Change logging macros to use Chromium's //base/logging.h.
 3. Separate out files with the GN variable build_with_chromium.
 4. Add a new config to each target to maintain our include structure
    and change over the logging macros.

Change-Id: I066698cd07b2315842c700b5adf01bdc656db9be
Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/1534469
Commit-Queue: Brandon Tolsch <btolsch@chromium.org>
Reviewed-by: Peter Thatcher <pthatcher@google.com>
Reviewed-by: Jordan Bayles <jophba@chromium.org>
Reviewed-by: Yuri Wiitala <miu@chromium.org>

3 files changed, 118 insertions, 97 deletions

diff --git a/third_party/abseil/BUILD.gn b/third_party/abseil/BUILD.gn
index 59d600ce..1aa744bf 100644
--- a/third_party/abseil/BUILD.gn
+++ b/third_party/abseil/BUILD.gn
@@ -2,55 +2,66 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-config("abseil_config") {
-  include_dirs = [ "//third_party/abseil/src" ]
-}
+import("//build_overrides/build.gni")
+
+if (build_with_chromium) {
+  source_set("abseil") {
+    public_deps = [
+      "//third_party/abseil-cpp/absl/strings",
+      "//third_party/abseil-cpp/absl/types:optional",
+    ]
+  }
+} else {
+  config("abseil_config") {
+    include_dirs = [ "//third_party/abseil/src" ]
+  }
 
-source_set("abseil") {
-  cflags_cc = [ "-Wno-sign-compare" ]
+  source_set("abseil") {
+    cflags_cc = [ "-Wno-sign-compare" ]
 
-  sources = [
-    "src/absl/base/attributes.h",
-    "src/absl/base/config.h",
-    "src/absl/base/internal/atomic_hook.h",
-    "src/absl/base/internal/identity.h",
-    "src/absl/base/internal/inline_variable.h",
-    "src/absl/base/internal/invoke.h",
-    "src/absl/base/internal/raw_logging.cc",
-    "src/absl/base/internal/raw_logging.h",
-    "src/absl/base/internal/throw_delegate.cc",
-    "src/absl/base/internal/throw_delegate.h",
-    "src/absl/base/log_severity.h",
-    "src/absl/base/macros.h",
-    "src/absl/base/optimization.h",
-    "src/absl/base/policy_checks.h",
-    "src/absl/base/port.h",
-    "src/absl/memory/memory.h",
-    "src/absl/meta/type_traits.h",
-    "src/absl/strings/ascii.cc",
-    "src/absl/strings/ascii.h",
-    "src/absl/strings/internal/charconv_bigint.cc",
-    "src/absl/strings/internal/charconv_bigint.h",
-    "src/absl/strings/internal/charconv_parse.cc",
-    "src/absl/strings/internal/charconv_parse.h",
-    "src/absl/strings/internal/memutil.cc",
-    "src/absl/strings/internal/memutil.h",
-    "src/absl/strings/charconv.cc",
-    "src/absl/strings/charconv.h",
-    "src/absl/strings/match.cc",
-    "src/absl/strings/match.h",
-    "src/absl/strings/numbers.cc",
-    "src/absl/strings/numbers.h",
-    "src/absl/strings/string_view.cc",
-    "src/absl/strings/string_view.h",
-    "src/absl/types/bad_optional_access.cc",
-    "src/absl/types/bad_optional_access.h",
-    "src/absl/types/optional.cc",
-    "src/absl/types/optional.h",
-  ]
+    sources = [
+      "src/absl/base/attributes.h",
+      "src/absl/base/config.h",
+      "src/absl/base/internal/atomic_hook.h",
+      "src/absl/base/internal/identity.h",
+      "src/absl/base/internal/inline_variable.h",
+      "src/absl/base/internal/invoke.h",
+      "src/absl/base/internal/raw_logging.cc",
+      "src/absl/base/internal/raw_logging.h",
+      "src/absl/base/internal/throw_delegate.cc",
+      "src/absl/base/internal/throw_delegate.h",
+      "src/absl/base/log_severity.h",
+      "src/absl/base/macros.h",
+      "src/absl/base/optimization.h",
+      "src/absl/base/policy_checks.h",
+      "src/absl/base/port.h",
+      "src/absl/memory/memory.h",
+      "src/absl/meta/type_traits.h",
+      "src/absl/strings/ascii.cc",
+      "src/absl/strings/ascii.h",
+      "src/absl/strings/charconv.cc",
+      "src/absl/strings/charconv.h",
+      "src/absl/strings/internal/charconv_bigint.cc",
+      "src/absl/strings/internal/charconv_bigint.h",
+      "src/absl/strings/internal/charconv_parse.cc",
+      "src/absl/strings/internal/charconv_parse.h",
+      "src/absl/strings/internal/memutil.cc",
+      "src/absl/strings/internal/memutil.h",
+      "src/absl/strings/match.cc",
+      "src/absl/strings/match.h",
+      "src/absl/strings/numbers.cc",
+      "src/absl/strings/numbers.h",
+      "src/absl/strings/string_view.cc",
+      "src/absl/strings/string_view.h",
+      "src/absl/types/bad_optional_access.cc",
+      "src/absl/types/bad_optional_access.h",
+      "src/absl/types/optional.cc",
+      "src/absl/types/optional.h",
+    ]
 
-  configs -= [ "//build/config:symbol_visibility_hidden" ]
-  configs += [ "//build/config:symbol_visibility_default" ]
-  configs -= [ "//build:default_include_dirs" ]
-  public_configs = [ ":abseil_config" ]
+    configs -= [ "//build/config:symbol_visibility_hidden" ]
+    configs += [ "//build/config:symbol_visibility_default" ]
+    configs -= [ "//build:default_include_dirs" ]
+    public_configs = [ ":abseil_config" ]
+  }
 }
diff --git a/third_party/googletest/BUILD.gn b/third_party/googletest/BUILD.gn
index 729b0889..b7a718ea 100644
--- a/third_party/googletest/BUILD.gn
+++ b/third_party/googletest/BUILD.gn
@@ -2,64 +2,68 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-config("gtest_config") {
-  visibility = [ ":*" ]
+import("//build_overrides/build.gni")
 
-  include_dirs = [ "src/googletest/include" ]
+if (!build_with_chromium) {
+  config("gmock_config") {
+    visibility = [ ":*" ]
 
-  cflags_cc = []
-  if (is_clang) {
-    cflags_cc += [ "-Wno-exit-time-destructors" ]
+    cflags_cc = [
+      # issue/15: GMock does not support the override keyword.
+      "-Wno-inconsistent-missing-override",
+    ]
+    if (is_clang) {
+      cflags_cc += [ "-Wno-exit-time-destructors" ]
+    }
+
+    include_dirs = [ "src/googlemock/include" ]
   }
-}
 
-config("gmock_config") {
-  visibility = [ ":*" ]
+  config("gtest_config") {
+    visibility = [ ":*" ]
 
-  cflags_cc = [
-    # issue/15: GMock does not support the override keyword.
-    "-Wno-inconsistent-missing-override",
-  ]
-  if (is_clang) {
-    cflags_cc += [ "-Wno-exit-time-destructors" ]
-  }
+    include_dirs = [ "src/googletest/include" ]
 
-  include_dirs = [ "src/googlemock/include" ]
-}
+    cflags_cc = []
+    if (is_clang) {
+      cflags_cc += [ "-Wno-exit-time-destructors" ]
+    }
+  }
 
-source_set("gtest") {
-  testonly = true
-  sources = [
-    "src/googletest/include/gtest.h",
-    "src/googletest/src/gtest-all.cc",
-  ]
+  source_set("gmock") {
+    testonly = true
+    sources = [
+      "src/googlemock/include/gmock.h",
+      "src/googlemock/src/gmock-all.cc",
+    ]
 
-  public_configs = [ ":gtest_config" ]
+    public_configs = [
+      ":gmock_config",
+      ":gtest_config",
+    ]
 
-  include_dirs = [ "src/googletest" ]
-}
+    include_dirs = [ "src/googlemock" ]
+  }
 
-source_set("gtest_main") {
-  testonly = true
-  sources = [
-    "src/googletest/src/gtest_main.cc",
-  ]
-  deps = [
-    ":gtest",
-  ]
-}
+  source_set("gtest") {
+    testonly = true
+    sources = [
+      "src/googletest/include/gtest.h",
+      "src/googletest/src/gtest-all.cc",
+    ]
 
-source_set("gmock") {
-  testonly = true
-  sources = [
-    "src/googlemock/include/gmock.h",
-    "src/googlemock/src/gmock-all.cc",
-  ]
+    public_configs = [ ":gtest_config" ]
 
-  public_configs = [
-    ":gmock_config",
-    ":gtest_config",
-  ]
+    include_dirs = [ "src/googletest" ]
+  }
 
-  include_dirs = [ "src/googlemock" ]
+  source_set("gtest_main") {
+    testonly = true
+    sources = [
+      "src/googletest/src/gtest_main.cc",
+    ]
+    deps = [
+      ":gtest",
+    ]
+  }
 }
diff --git a/third_party/tinycbor/BUILD.gn b/third_party/tinycbor/BUILD.gn
index f478381c..5127febb 100644
--- a/third_party/tinycbor/BUILD.gn
+++ b/third_party/tinycbor/BUILD.gn
@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build_overrides/build.gni")
+
 source_set("tinycbor") {
   sources = [
     "src/src/cbor.h",
@@ -14,8 +16,12 @@ source_set("tinycbor") {
     "src/src/utf8_p.h",
   ]
 
-  configs -= [ "//build/config:symbol_visibility_hidden" ]
-  configs += [ "//build/config:symbol_visibility_default" ]
+  config_path = "//build/config"
+  if (build_with_chromium) {
+    config_path += "/gcc"
+  }
+  configs -= [ "$config_path:symbol_visibility_hidden" ]
+  configs += [ "$config_path:symbol_visibility_default" ]
 
   defines = [ "WITHOUT_OPEN_MEMSTREAM" ]
 }