Introduce regexp=interpreted to GYP to enable building with interpreted regexp engine.

build/common.gypi

 # Copyright 2012 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 77 matching lines @@
     'v8_use_liveobjectlist%': 'false',
     'werror%': '-Werror',
 
     # With post mortem support enabled, metadata is embedded into libv8 that
     # describes various parameters of the VM for use by debuggers. See
     # tools/gen-postmortem-metadata.py for details.
     'v8_postmortem_support%': 'false',
 
     # For a shared library build, results in "libv8-<(soname_version).so".
     'soname_version%': '',
+    
+    # Interpreted regexp engine exists as platform-independent alternative
+    # based where the regular expression is compiled to a bytecode.
+    'v8_interpreted_regexp%': 0,
   },
   'target_defaults': {
     'conditions': [
       ['v8_enable_debugger_support==1', {
         'defines': ['ENABLE_DEBUGGER_SUPPORT',],
       }],
       ['v8_enable_disassembler==1', {
         'defines': ['ENABLE_DISASSEMBLER',],
       }],
       ['v8_object_print==1', {
         'defines': ['OBJECT_PRINT',],
       }],
       ['v8_enable_gdbjit==1', {
         'defines': ['ENABLE_GDB_JIT_INTERFACE',],
       }],
+      ['v8_interpreted_regexp==1', {
+        'defines': ['V8_INTERPRETED_REGEXP',],
+      }],
       ['v8_target_arch=="arm"', {
         'defines': [
           'V8_TARGET_ARCH_ARM',
         ],
         'conditions': [
           [ 'v8_can_use_unaligned_accesses=="true"', {
             'defines': [
               'CAN_USE_UNALIGNED_ACCESSES=1',
             ],
           }],
@@ skipping 263 matching lines @@
                 'OptimizeReferences': '2',
                 'EnableCOMDATFolding': '2',
               },
             },
           }],  # OS=="win"
         ],  # conditions
       },  # Release
     },  # configurations
   },  # target_defaults
 }