Fast TLS support.

SConstruct

 # Copyright 2010 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 110 matching lines @@
     },
     'profilingsupport:on': {
       'CPPDEFINES':   ['ENABLE_VMSTATE_TRACKING', 'ENABLE_LOGGING_AND_PROFILING'],
     },
     'debuggersupport:on': {
       'CPPDEFINES':   ['ENABLE_DEBUGGER_SUPPORT'],
     },
     'inspector:on': {
       'CPPDEFINES':   ['INSPECTOR'],
     },
+    'fasttls:on': {
+      'CPPDEFINES':   ['V8_FAST_TLS'],
+    },
     'liveobjectlist:on': {
       'CPPDEFINES':   ['ENABLE_DEBUGGER_SUPPORT', 'INSPECTOR',
                        'LIVE_OBJECT_LIST', 'OBJECT_PRINT'],
     }
   },
   'gcc': {
     'all': {
       'CCFLAGS':      ['$DIALECTFLAGS', '$WARNINGFLAGS'],
       'CXXFLAGS':     ['$CCFLAGS', '-fno-rtti', '-fno-exceptions'],
     },
@@ skipping 637 matching lines @@
   'unalignedaccesses': {
     'values': ['default', 'on', 'off'],
     'default': 'default',
     'help': 'set whether the ARM target supports unaligned accesses'
   },
   'disassembler': {
     'values': ['on', 'off'],
     'default': 'off',
     'help': 'enable the disassembler to inspect generated code'
   },
+  'fasttls': {
+    'values': ['on', 'off'],
+    'default': 'on',
+    'help': 'enable fast thread local storage support'

[antonm, 2011/03/25 16:44:44]

maybe add something like 'if supported for the given platform'

[Vitaly Repeshko, 2011/03/27 15:54:48]

Done.

+  },
   'sourcesignatures': {
     'values': ['MD5', 'timestamp'],
     'default': 'MD5',
     'help': 'set how the build system detects file changes'
   },
   'console': {
     'values': ['dumb', 'readline'],
     'default': 'dumb',
     'help': 'the console to use for the d8 shell'
   },
@@ skipping 386 matching lines @@
 # version of scons.  Also, there's a bug in some revisions that
 # doesn't allow this flag to be set, so we swallow any exceptions.
 # Lovely.
 try:
   SetOption('warn', 'no-deprecated')
 except:
   pass
 
 
 Build()