Align host and target architectures when building v8_shell.

tools/gyp/v8.gyp

 # Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 268 matching lines @@
             ],
           },
         },
         {
           'target_name': 'v8_snapshot',
           'type': '<(library)',
           'toolsets': ['host', 'target'],
           'conditions': [
             ['component=="shared_library"', {
               'conditions': [
+                # The ARM assembler assumes the host is 32 bits, so force building
+                # 32-bit host tools.
+                ['v8_target_arch=="arm" and host_arch=="x64" and _toolset=="host"', {
+                  'cflags': ['-m32'],
+                  'ldflags': ['-m32'],
+                }],
                 ['OS=="win"', {
                   'defines': [
                     'BUILDING_V8_SHARED',
                   ],
                   'direct_dependent_settings': {
                     'defines': [
                       'USING_V8_SHARED',
                     ],
                   },
                 }, {
@@ skipping 665 matching lines @@
             'v8'
           ],
           'sources': [
             '../../samples/shell.cc',
           ],
           'conditions': [
             ['OS=="win"', {
               # This could be gotten by not setting chromium_code, if that's OK.
               'defines': ['_CRT_SECURE_NO_WARNINGS'],
             }],
+            # The ARM assembler assumes the host is 32 bits, so force building
+            # 32-bit host tools.
+            ['v8_target_arch=="arm" and host_arch=="x64" and _toolset=="host"', {
+              'cflags': ['-m32'],
+              'ldflags': ['-m32'],
+            }],
             ['v8_compress_startup_data=="bz2"', {
               'libraries': [
                 '-lbz2',
               ]}],
           ],
         },
       ],
     }, { # use_system_v8 != 0
       'targets': [
         {
@@ skipping 11 matching lines @@
           'type': 'none',
           'toolsets': ['host'],
           'dependencies': [
             'v8'
           ],
         },
       ],
     }],
   ],
 }