--- build/toolchain/openbsd/BUILD.gn.orig	2022-02-07 13:39:41 UTC
+++ build/toolchain/openbsd/BUILD.gn
@@ -0,0 +1,66 @@
+# Copyright 2013 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/sysroot.gni")
+import("//build/toolchain/gcc_toolchain.gni")
+
+clang_toolchain("clang_x86") {
+  toolchain_args = {
+    current_cpu = "x86"
+    current_os = "openbsd"
+  }
+}
+
+gcc_toolchain("x86") {
+  cc = "gcc"
+  cxx = "g++"
+
+  readelf = "readelf"
+  nm = "nm"
+  ar = "ar"
+  ld = cxx
+
+  toolchain_args = {
+    current_cpu = "x86"
+    current_os = "openbsd"
+    is_clang = false
+  }
+}
+
+clang_toolchain("clang_x64") {
+  toolchain_args = {
+    current_cpu = "x64"
+    current_os = "openbsd"
+  }
+}
+
+gcc_toolchain("x64") {
+  cc = "gcc"
+  cxx = "g++"
+
+  readelf = "readelf"
+  nm = "nm"
+  ar = "ar"
+  ld = cxx
+
+  toolchain_args = {
+    current_cpu = "x64"
+    current_os = "openbsd"
+    is_clang = false
+  }
+}
+
+clang_toolchain("clang_arm") {
+  toolchain_args = {
+    current_cpu = "arm64"
+    current_os = "openbsd"
+  }
+}
+
+clang_toolchain("clang_arm64") {
+  toolchain_args = {
+    current_cpu = "arm64"
+    current_os = "openbsd"
+  }
+}