Prepares for arm64 cross-build.

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',
     ],
 
     # Default value.  This may be overridden in a containing project gyp.
     'target_arch%': 'ia32',
 
     'conditions': [
       ['"<(target_arch)"=="ia32"', { 'dart_target_arch': 'IA32', }],
       ['"<(target_arch)"=="x64"', { 'dart_target_arch': 'X64', }],
       ['"<(target_arch)"=="arm"', { 'dart_target_arch': 'ARM', }],
+      ['"<(target_arch)"=="arm64"', { 'dart_target_arch': 'ARM64', }],
       ['"<(target_arch)"=="simarm"', { 'dart_target_arch': 'SIMARM', }],
       ['"<(target_arch)"=="simarm64"', { 'dart_target_arch': 'SIMARM64', }],
       ['"<(target_arch)"=="mips"', { 'dart_target_arch': 'MIPS', }],
       ['"<(target_arch)"=="simmips"', { 'dart_target_arch': 'SIMMIPS', }],
       [ 'OS=="linux"', { 'dart_target_os': 'Linux', } ],
       [ 'OS=="mac"', { 'dart_target_os': 'Macos', } ],
       [ 'OS=="win"', { 'dart_target_os': 'Win', } ],
       # The OS is set to "android" only when we are building Dartium+Clank. We
       # use 'chrome_target_os' so that Release and Debug configurations inherit
       # from Android configurations when OS=="android". If OS is not set to
@@ skipping 23 matching lines @@
         'abstract': 1,
       },
 
       'Dart_simarm_Base': {
         'abstract': 1,
         'defines': [
           'TARGET_ARCH_ARM',
         ]
       },
 
+      'Dart_arm_Base': {
+        'abstract': 1,
+        'defines': [
+          'TARGET_ARCH_ARM',
+        ],
+      },
+
       'Dart_simarm64_Base': {
         'abstract': 1,
         'defines': [
           'TARGET_ARCH_ARM64',
         ]
       },
 
-      'Dart_arm_Base': {
+      'Dart_arm64_Base': {
         'abstract': 1,
         'defines': [
-          'TARGET_ARCH_ARM',
+          'TARGET_ARCH_ARM64',
         ],
       },
 
       'Dart_simmips_Base': {
         'abstract': 1,
         'defines': [
           'TARGET_ARCH_MIPS',
         ]
       },
 
@@ skipping 147 matching lines @@
 
       'ReleaseARM': {
         'inherit_from': [
           'Dart_Base', 'Dart_arm_Base', 'Dart_Release',
           'Dart_Linux_Base',
           'Dart_Linux_arm_Base',
           'Dart_Linux_Release',
         ],
       },
 
+      'DebugXARM64': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_arm64_Base', 'Dart_Debug',
+          'Dart_Linux_Base',
+          'Dart_Linux_xarm64_Base',
+          'Dart_Linux_Debug',
+        ],
+      },
+
+      'ReleaseXARM64': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_arm64_Base', 'Dart_Release',
+          'Dart_Linux_Base',
+          'Dart_Linux_xarm64_Base',
+          'Dart_Linux_Release',
+        ],
+      },
+
+      'DebugARM64': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_arm64_Base', 'Dart_Debug',
+          'Dart_Linux_Base',
+          'Dart_Linux_arm64_Base',
+          'Dart_Linux_Debug',
+        ],
+      },
+
+      'ReleaseARM64': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_arm64_Base', 'Dart_Release',
+          'Dart_Linux_Base',
+          'Dart_Linux_arm64_Base',
+          'Dart_Linux_Release',
+        ],
+      },
+
       'DebugXMIPS': {
         'inherit_from': [
           'Dart_Base', 'Dart_mips_Base', 'Dart_Debug',
           'Dart_Linux_Base',
           'Dart_Linux_xmips_Base',
           'Dart_Linux_Debug',
         ],
       },
 
       'ReleaseXMIPS': {
@@ skipping 69 matching lines @@
       'Debug': {
         'inherit_from': ['Debug<(chrome_target_os)<(dart_target_arch)']
       },
 
       'Release': {
         'inherit_from': ['Release<(chrome_target_os)<(dart_target_arch)']
       },
     },
   },
 }