- Enable automatic cross-builds across ARM and MIPS architectures.

tools/gyp/configurations.gypi

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'common_gcc_warning_flags': [
       '-Wall',
       '-Wextra', # Also known as -W.
       '-Wno-unused-parameter',
@@ skipping 155 matching lines @@
         'inherit_from': [
           'Dart_Base', 'Dart_simmips_Base', 'Dart_Release',
           'Dart_<(dart_target_os)_Base',
           'Dart_<(dart_target_os)_simmips_Base',
           'Dart_<(dart_target_os)_Release',
         ],
       },
 
 
       # ARM and MIPS hardware configurations are only for Linux and Android.
+      'DebugXARM': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_arm_Base', 'Dart_Debug',
+          'Dart_Linux_Base',
+          'Dart_Linux_xarm_Base',
+          'Dart_Linux_Debug',
+        ],
+      },
+
+      'ReleaseXARM': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_arm_Base', 'Dart_Release',
+          'Dart_Linux_Base',
+          'Dart_Linux_xarm_Base',
+          'Dart_Linux_Release',
+        ],
+      },
+
       'DebugARM': {
         'inherit_from': [
           'Dart_Base', 'Dart_arm_Base', 'Dart_Debug',
           'Dart_Linux_Base',
           'Dart_Linux_arm_Base',
           'Dart_Linux_Debug',
         ],
       },
 
       'ReleaseARM': {
@@ skipping 87 matching lines @@
       'Debug': {
         'inherit_from': ['Debug<(chrome_target_os)<(dart_target_arch)']
       },
 
       'Release': {
         'inherit_from': ['Release<(chrome_target_os)<(dart_target_arch)']
       },
     },
   },
 }