Fix ARMv6 Linux cross-build

build/config/compiler/BUILD.gn

 # Copyright (c) 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.
 
 declare_args() {
   # The optimization level to use for debug builds.
   if (is_android) {
     # On Android we kind of optimize some things that don't affect debugging
     # much even when optimization is disabled to get the binary size down.
     debug_optimization_level = "s"
@@ skipping 538 matching lines @@
     # required when compiling Chrome for iOS.
     default_warning_flags += [ "-Wpartial-availability" ]
   }
 
   # Suppress warnings about ABI changes on ARM (Clang doesn't give this
   # warning).
   if (current_cpu == "arm" && !is_clang) {
     default_warning_flags += [ "-Wno-psabi" ]
   }
 
+  # The Raspberry Pi 1 toolchain enables this warning, but Dart doesn't build
+  # cleanly with it.
+  if (is_linux && !is_clang && current_cpu == "arm" && arm_version == 6) {
+    default_warning_flags += [ "-Wno-type-limits" ]
+  }
+
   if (is_android) {
     # Disable any additional warnings enabled by the Android build system but
     # which chromium does not build cleanly with (when treating warning as
     # errors).
     default_warning_flags += [
       "-Wno-extra",
       "-Wno-ignored-qualifiers",
       "-Wno-type-limits",
     ]
     default_warning_flags_cc += [
@@ skipping 207 matching lines @@
       cflags = [ "/Zi" ]  # Produce PDB file, no edit and continue.
     }
     ldflags = [ "/DEBUG" ]
   } else {
     cflags = [
       "-g3",
       "-ggdb3",
     ]
   }
 }