1 files changed, 34 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/config/chromeos/BUILD.gn b/third_party/libwebrtc/build/config/chromeos/BUILD.gn
new file mode 100644
index 0000000000..f3dfe70d42
--- /dev/null
+++ b/third_party/libwebrtc/build/config/chromeos/BUILD.gn
@@ -0,0 +1,34 @@
+# Copyright 2019 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/chromeos/ui_mode.gni")
+
+assert(is_chromeos_ash)
+
+declare_args() {
+  # The location to a file used to dump symbols ordered by Call-Chain Clustering (C3)
+  # https://research.fb.com/wp-content/uploads/2017/01/cgo2017-hfsort-final1.pdf?
+  # to a file, used for generating orderfiles in Chrome OS
+  dump_call_chain_clustering_order = ""
+}
+
+declare_args() {
+  # Whether or not we're using new pass manager to build and link Chrome
+  use_new_pass_manager = dump_call_chain_clustering_order != ""
+}
+
+config("print_orderfile") {
+  if (dump_call_chain_clustering_order != "") {
+    _output_orderfile =
+        rebase_path(dump_call_chain_clustering_order, root_build_dir)
+    ldflags = [ "-Wl,--print-symbol-order=$_output_orderfile" ]
+  }
+}
+
+config("compiler") {
+  if (use_new_pass_manager) {
+    cflags = [ "-fexperimental-new-pass-manager" ]
+    ldflags = [ "-fexperimental-new-pass-manager" ]
+  }
+}