Enable mksnapshot on ARM when cross-compiling using gyp

tools/gyp/v8.gyp

 # Copyright 2009 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 138 matching lines @@
       'direct_dependent_settings': {
         'include_dirs': [
           '../../include',
         ],
       },
     },
     {
       'target_name': 'v8_snapshot',
       'type': '<(library)',
       'dependencies': [
-        'mksnapshot',
-        'js2c',
+        'mksnapshot#host',
+        'js2c#host',
         'v8_base',
       ],
       'include_dirs+': [
         '../../src',
       ],
       'sources': [
         '<(SHARED_INTERMEDIATE_DIR)/libraries-empty.cc',
         '<(INTERMEDIATE_DIR)/snapshot.cc',
       ],
       'actions': [
         {
           'action_name': 'run_mksnapshot',
           'inputs': [
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)mksnapshot<(EXECUTABLE_SUFFIX)',
           ],
           'outputs': [
             '<(INTERMEDIATE_DIR)/snapshot.cc',
           ],
           'action': ['<@(_inputs)', '<@(_outputs)'],
         },
       ],
     },
     {
       'target_name': 'v8_nosnapshot',
       'type': '<(library)',
+      'toolsets': ['host', 'target'],
       'dependencies': [
-        'js2c',
+        'js2c#host',
         'v8_base',
       ],
       'include_dirs+': [
         '../../src',
       ],
       'sources': [
         '<(SHARED_INTERMEDIATE_DIR)/libraries.cc',
         '../../src/snapshot-empty.cc',
       ],
+      'conditions': [
+        # The ARM assembler assumes the host is 32 bits, so force building
+        # 32-bit host tools.
+        # TODO(piman): This assumes that the host is ia32 or amd64. Fixing the
+        # code would be better
+        ['target_arch=="arm" and _toolset=="host"', {
+          'cflags': ['-m32'],
+          'ldflags': ['-m32'],
+        }]
+      ]
     },
     {
       'target_name': 'v8_base',
       'type': '<(library)',
+      'toolsets': ['host', 'target'],
       'include_dirs+': [
         '../../src',
       ],
       'sources': [
         '../../src/accessors.cc',
         '../../src/accessors.h',
         '../../src/allocation.cc',
         '../../src/allocation.h',
         '../../src/api.cc',
         '../../src/api.h',
@@ skipping 176 matching lines @@
             '../../src/arm',
           ],
           'sources': [
             '../../src/arm/assembler-arm-inl.h',
             '../../src/arm/assembler-arm.cc',
             '../../src/arm/assembler-arm.h',
             '../../src/arm/builtins-arm.cc',
             '../../src/arm/codegen-arm.cc',
             '../../src/arm/codegen-arm.h',
             '../../src/arm/constants-arm.h',
+            '../../src/arm/constants-arm.cc',
             '../../src/arm/cpu-arm.cc',
             '../../src/arm/debug-arm.cc',
             '../../src/arm/disasm-arm.cc',
             '../../src/arm/fast-codegen-arm.cc',
             '../../src/arm/frames-arm.cc',
             '../../src/arm/frames-arm.h',
             '../../src/arm/ic-arm.cc',
             '../../src/arm/jump-target-arm.cc',
             '../../src/arm/macro-assembler-arm.cc',
             '../../src/arm/macro-assembler-arm.h',
             '../../src/arm/regexp-macro-assembler-arm.cc',
             '../../src/arm/regexp-macro-assembler-arm.h',
             '../../src/arm/register-allocator-arm.cc',
             '../../src/arm/simulator-arm.cc',
             '../../src/arm/stub-cache-arm.cc',
             '../../src/arm/virtual-frame-arm.cc',
             '../../src/arm/virtual-frame-arm.h',
           ],
+          'conditions': [
+            # The ARM assembler assumes the host is 32 bits, so force building
+            # 32-bit host tools.
+            # TODO(piman): This assumes that the host is ia32 or amd64. Fixing
+            # the code would be better
+            ['_toolset=="host"', {
+              'cflags': ['-m32'],
+              'ldflags': ['-m32'],
+            }]
+          ]
         }],
         ['target_arch=="ia32"', {
           'include_dirs+': [
             '../../src/ia32',
           ],
           'sources': [
             '../../src/ia32/assembler-ia32-inl.h',
             '../../src/ia32/assembler-ia32.cc',
             '../../src/ia32/assembler-ia32.h',
             '../../src/ia32/builtins-ia32.cc',
@@ skipping 76 matching lines @@
           'msvs_disabled_warnings': [4355, 4800, 4018, 4244],
           'link_settings':  {
             'libraries': [ '-lwinmm.lib' ],
           },
         }],
       ],
     },
     {
       'target_name': 'js2c',
       'type': 'none',
+      'toolsets': ['host'],
       'variables': {
         'library_files': [
           '../../src/runtime.js',
           '../../src/v8natives.js',
           '../../src/array.js',
           '../../src/string.js',
           '../../src/uri.js',
           '../../src/math.js',
           '../../src/messages.js',
           '../../src/apinatives.js',
@@ skipping 22 matching lines @@
             '<@(_outputs)',
             'CORE',
             '<@(library_files)'
           ],
         },
       ],
     },
     {
       'target_name': 'mksnapshot',
       'type': 'executable',
+      'toolsets': ['host'],
       'dependencies': [
         'v8_nosnapshot',
       ],
       'include_dirs+': [
         '../../src',
       ],
       'sources': [
         '../../src/mksnapshot.cc',
       ],
+      'conditions': [
+        # The ARM assembler assumes the host is 32 bits, so force building
+        # 32-bit host tools.
+        # TODO(piman): This assumes that the host is ia32 or amd64. Fixing
+        # the code would be better
+        ['target_arch=="arm" and _toolset=="host"', {
+          'cflags': ['-m32'],
+          'ldflags': ['-m32'],
+        }]
+      ]
     },
     {
       'target_name': 'v8_shell',
       'type': 'executable',
       'dependencies': [
         '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'],
         }],
       ],
     },
   ],
 }