Source

v8onpython / v8-src / SConstruct

Full commit
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
# Copyright 2008 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
#       with the distribution.
#     * Neither the name of Google Inc. nor the names of its
#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import platform
import re
import sys
import os
from os.path import join, dirname, abspath
from types import DictType, StringTypes
root_dir = dirname(File('SConstruct').rfile().abspath)
sys.path.append(join(root_dir, 'tools'))
import js2c, utils


LIBRARY_FLAGS = {
  'all': {
    'CPPDEFINES':   ['ENABLE_LOGGING_AND_PROFILING']
  },
  'gcc': {
    'all': {
      'CCFLAGS':      ['$DIALECTFLAGS', '$WARNINGFLAGS'],
      'CXXFLAGS':     ['$CCFLAGS', '-fno-rtti', '-fno-exceptions'],
    },
    'mode:debug': {
      'CCFLAGS':      ['-g', '-O0'],
      'CPPDEFINES':   ['ENABLE_DISASSEMBLER', 'DEBUG']
    },
    'mode:release': {
      'CCFLAGS':      ['-O3', '-fomit-frame-pointer', '-fdata-sections', '-ffunction-sections']
    },
    'os:linux': {
      'CCFLAGS':      ['-ansi'],
    },
    'os:macos': {
      'CCFLAGS':      ['-ansi'],
    },
    'os:freebsd': {
      'CCFLAGS':      ['-ansi'],
    },
    'os:win32': {
      'CCFLAGS':      ['-DWIN32'],
      'CXXFLAGS':     ['-DWIN32'],
    },
    'wordsize:64': {
      'CCFLAGS':      ['-m32'],
      'LINKFLAGS':    ['-m32']
    }
  },
  'msvc': {
    'all': {
      'DIALECTFLAGS': ['/nologo'],
      'CCFLAGS':      ['$DIALECTFLAGS', '$WARNINGFLAGS'],
      'CXXFLAGS':     ['$CCFLAGS', '/GR-', '/Gy'],
      'CPPDEFINES':   ['WIN32', '_USE_32BIT_TIME_T', 'PCRE_STATIC'],
      'LINKFLAGS':    ['/NOLOGO', '/MACHINE:X86', '/INCREMENTAL:NO',
          '/NXCOMPAT', '/IGNORE:4221'],
      'ARFLAGS':      ['/NOLOGO'],
      'CCPDBFLAGS':   ['/Zi']
    },
    'mode:debug': {
      'CCFLAGS':      ['/Od', '/Gm'],
      'CPPDEFINES':   ['_DEBUG', 'ENABLE_DISASSEMBLER', 'DEBUG'],
      'LINKFLAGS':    ['/DEBUG'],
      'msvcrt:static': {
        'CCFLAGS': ['/MTd']
      },
      'msvcrt:shared': {
        'CCFLAGS': ['/MDd']
      }
    },
    'mode:release': {
      'CCFLAGS':      ['/O2', '/GL'],
      'LINKFLAGS':    ['/OPT:REF', '/OPT:ICF', '/LTCG'],
      'ARFLAGS':      ['/LTCG'],
      'msvcrt:static': {
        'CCFLAGS': ['/MT']
      },
      'msvcrt:shared': {
        'CCFLAGS': ['/MD']
      }
    },
  }
}


V8_EXTRA_FLAGS = {
  'gcc': {
    'all': {
      'CXXFLAGS':     [], #['-fvisibility=hidden'],
      'WARNINGFLAGS': ['-pedantic', '-Wall', '-Werror', '-W',
          '-Wno-unused-parameter']
    },
    'arch:arm': {
      'CPPDEFINES':   ['ARM']
    },
    'os:win32': {
      'WARNINGFLAGS': ['-Wno-long-long']
    },
    'disassembler:on': {
      'CPPDEFINES':   ['ENABLE_DISASSEMBLER']
    }
  },
  'msvc': {
    'all': {
      'WARNINGFLAGS': ['/W3', '/WX', '/wd4355', '/wd4800']
    },
    'library:shared': {
      'CPPDEFINES':   ['BUILDING_V8_SHARED']
    },
    'arch:arm': {
      'CPPDEFINES':   ['ARM'],
      # /wd4996 is to silence the warning about sscanf
      # used by the arm simulator.
      'WARNINGFLAGS': ['/wd4996']
    },
    'disassembler:on': {
      'CPPDEFINES':   ['ENABLE_DISASSEMBLER']
    }
  }
}


MKSNAPSHOT_EXTRA_FLAGS = {
  'gcc': {
    'os:linux': {
      'LIBS': ['pthread'],
    },
    'os:macos': {
      'LIBS': ['pthread'],
    },
    'os:freebsd': {
      'LIBS': ['pthread'],
    },
    'os:win32': {
      'LIBS': ['winmm'],
    },
  },
  'msvc': {
    'all': {
      'LIBS': ['winmm']
    }
  }
}


JSCRE_EXTRA_FLAGS = {
  'gcc': {
    'all': {
      'CPPDEFINES':   ['SUPPORT_UTF8', 'NO_RECURSE', 'SUPPORT_UCP'],
      'WARNINGFLAGS': ['-w']
    },
  },
  'msvc': {
    'all': {
      'CPPDEFINES':   ['SUPPORT_UTF8', 'NO_RECURSE', 'SUPPORT_UCP'],
      'WARNINGFLAGS': ['/W3', '/WX', '/wd4355', '/wd4800']
    },
    'library:shared': {
      'CPPDEFINES':   ['BUILDING_V8_SHARED']
    }
  }
}


DTOA_EXTRA_FLAGS = {
  'gcc': {
    'all': {
      'WARNINGFLAGS': ['-Werror']
    }
  },
  'msvc': {
    'all': {
      'WARNINGFLAGS': ['/WX', '/wd4018', '/wd4244']
    }
  }
}


CCTEST_EXTRA_FLAGS = {
  'all': {
    'CPPPATH': [join(root_dir, 'src')],
    'LIBS': ['$LIBRARY']
  },
  'gcc': {
    'all': {
      'LIBPATH': [abspath('.')]
    },
    'os:linux': {
      'LIBS':         ['pthread'],
    },
    'os:macos': {
      'LIBS':         ['pthread'],
    },
    'os:freebsd': {
      'LIBS':         ['execinfo', 'pthread']
    },
    'os:win32': {
      'LIBS': ['winmm']
    },
    'wordsize:64': {
      'CCFLAGS':      ['-m32'],
      'LINKFLAGS':    ['-m32']
    },
  },
  'msvc': {
    'all': {
      'CPPDEFINES': ['_HAS_EXCEPTIONS=0'],
      'LIBS': ['winmm']
    },
    'library:shared': {
      'CPPDEFINES': ['USING_V8_SHARED']
    }
  }
}


SAMPLE_FLAGS = {
  'all': {
    'CPPPATH': [join(abspath('.'), 'include')],
    'LIBS': ['$LIBRARY'],
  },
  'gcc': {
    'all': {
      'LIBPATH': ['.']
    },
    'os:linux': {
      'LIBS':         ['pthread'],
    },
    'os:macos': {
      'LIBS':         ['pthread'],
    },
    'os:freebsd': {
      'LIBS':         ['execinfo', 'pthread']
    },
    'os:win32': {
      'LIBS':         ['winmm']
    },
    'wordsize:64': {
      'CCFLAGS':      ['-m32'],
      'LINKFLAGS':    ['-m32']
    },
    'mode:release': {
      'CCFLAGS':      ['-O2']
    },
    'mode:debug': {
      'CCFLAGS':      ['-g', '-O0']
    }
  },
  'msvc': {
    'all': {
      'CCFLAGS': ['/nologo'],
      'LINKFLAGS': ['/nologo'],
      'LIBS': ['winmm']
    },
    'library:shared': {
      'CPPDEFINES': ['USING_V8_SHARED']
    },
    'prof:on': {
      'LINKFLAGS': ['/MAP']
    },
    'mode:release': {
      'CCFLAGS':   ['/O2'],
      'LINKFLAGS': ['/OPT:REF', '/OPT:ICF', '/LTCG'],
      'msvcrt:static': {
        'CCFLAGS': ['/MT']
      },
      'msvcrt:shared': {
        'CCFLAGS': ['/MD']
      }
    },
    'mode:debug': {
      'CCFLAGS':   ['/Od'],
      'LINKFLAGS': ['/DEBUG'],
      'msvcrt:static': {
        'CCFLAGS': ['/MTd']
      },
      'msvcrt:shared': {
        'CCFLAGS': ['/MDd']
      }
    }
  }
}


D8_FLAGS = {
  'gcc': {
    'console:readline': {
      'LIBS': ['readline']
    },
    'os:linux': {
      'LIBS': ['pthread'],
    },
    'os:macos': {
      'LIBS': ['pthread'],
    },
    'os:freebsd': {
      'LIBS': ['pthread'],
    },
    'os:win32': {
      'LIBS': ['winmm'],
    },
  },
  'msvc': {
    'all': {
      'LIBS': ['winmm']
    }
  }
}


SUFFIXES = {
  'release': '',
  'debug': '_g'
}


def Abort(message):
  print message
  sys.exit(1)


def GuessToolchain(os):
  tools = Environment()['TOOLS']
  if 'gcc' in tools:
    return 'gcc'
  elif 'msvc' in tools:
    return 'msvc'
  else:
    return None


OS_GUESS = utils.GuessOS()
TOOLCHAIN_GUESS = GuessToolchain(OS_GUESS)
ARCH_GUESS = utils.GuessArchitecture()
WORDSIZE_GUESS = utils.GuessWordsize()


SIMPLE_OPTIONS = {
  'toolchain': {
    'values': ['gcc', 'msvc'],
    'default': TOOLCHAIN_GUESS,
    'help': 'the toolchain to use'
  },
  'os': {
    'values': ['freebsd', 'linux', 'macos', 'win32'],
    'default': OS_GUESS,
    'help': 'the os to build for'
  },
  'arch': {
    'values':['arm', 'ia32'],
    'default': ARCH_GUESS,
    'help': 'the architecture to build for'
  },
  'snapshot': {
    'values': ['on', 'off', 'nobuild'],
    'default': 'off',
    'help': 'build using snapshots for faster start-up'
  },
  'prof': {
    'values': ['on', 'off'],
    'default': 'off',
    'help': 'enable profiling of build target'
  },
  'library': {
    'values': ['static', 'shared'],
    'default': 'static',
    'help': 'the type of library to produce'
  },
  'msvcrt': {
    'values': ['static', 'shared'],
    'default': 'static',
    'help': 'the type of MSVCRT library to use'
  },
  'wordsize': {
    'values': ['64', '32'],
    'default': WORDSIZE_GUESS,
    'help': 'the word size'
  },
  'simulator': {
    'values': ['arm', 'none'],
    'default': 'none',
    'help': 'build with simulator'
  },
  'disassembler': {
    'values': ['on', 'off'],
    'default': 'off',
    'help': 'enable the disassembler to inspect generated code'
  },
  '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'
  }
}


def GetOptions():
  result = Options()
  result.Add('mode', 'compilation mode (debug, release)', 'release')
  result.Add('sample', 'build sample (shell, process)', '')
  result.Add('env', 'override environment settings (NAME1:value1,NAME2:value2)', '')
  for (name, option) in SIMPLE_OPTIONS.iteritems():
    help = '%s (%s)' % (name, ", ".join(option['values']))
    result.Add(name, help, option.get('default'))
  return result


def SplitList(str):
  return [ s for s in str.split(",") if len(s) > 0 ]


def IsLegal(env, option, values):
  str = env[option]
  for s in SplitList(str):
    if not s in values:
      Abort("Illegal value for option %s '%s'." % (option, s))
      return False
  return True


def VerifyOptions(env):
  if not IsLegal(env, 'mode', ['debug', 'release']):
    return False
  if not IsLegal(env, 'sample', ["shell", "process"]):
    return False
  if env['os'] == 'win32' and env['library'] == 'shared' and env['prof'] == 'on':
    Abort("Profiling on windows only supported for static library.")
  for (name, option) in SIMPLE_OPTIONS.iteritems():
    if (not option.get('default')) and (name not in ARGUMENTS):
      message = ("A value for option %s must be specified (%s)." %
          (name, ", ".join(option['values'])))
      Abort(message)
    if not env[name] in option['values']:
      message = ("Unknown %s value '%s'.  Possible values are (%s)." %
          (name, env[name], ", ".join(option['values'])))
      Abort(message)


class BuildContext(object):

  def __init__(self, options, env_overrides, samples):
    self.library_targets = []
    self.mksnapshot_targets = []
    self.cctest_targets = []
    self.sample_targets = []
    self.d8_targets = []
    self.options = options
    self.env_overrides = env_overrides
    self.samples = samples
    self.use_snapshot = (options['snapshot'] != 'off')
    self.build_snapshot = (options['snapshot'] == 'on')
    self.flags = None

  def AddRelevantFlags(self, initial, flags):
    result = initial.copy()
    self.AppendFlags(result, flags.get('all'))
    toolchain = self.options['toolchain']
    if toolchain in flags:
      self.AppendFlags(result, flags[toolchain].get('all'))
      for option in sorted(self.options.keys()):
        value = self.options[option]
        self.AppendFlags(result, flags[toolchain].get(option + ':' + value))
    return result

  def AddRelevantSubFlags(self, options, flags):
    self.AppendFlags(options, flags.get('all'))
    for option in sorted(self.options.keys()):
      value = self.options[option]
      self.AppendFlags(options, flags.get(option + ':' + value))

  def GetRelevantSources(self, source):
    result = []
    result += source.get('all', [])
    for (name, value) in self.options.iteritems():
      result += source.get(name + ':' + value, [])
    return sorted(result)

  def AppendFlags(self, options, added):
    if not added:
      return
    for (key, value) in added.iteritems():
      if key.find(':') != -1:
        self.AddRelevantSubFlags(options, { key: value })
      else:
        if not key in options:
          options[key] = value
        else:
          prefix = options[key]
          if isinstance(prefix, StringTypes): prefix = prefix.split()
          options[key] = prefix + value

  def ConfigureObject(self, env, input, **kw):
    if self.options['library'] == 'static':
      return env.StaticObject(input, **kw)
    else:
      return env.SharedObject(input, **kw)

  def ApplyEnvOverrides(self, env):
    if not self.env_overrides:
      return
    if type(env['ENV']) == DictType:
      env['ENV'].update(**self.env_overrides)
    else:
      env['ENV'] = self.env_overrides


def PostprocessOptions(options):
  # Adjust architecture if the simulator option has been set
  if (options['simulator'] != 'none') and (options['arch'] != options['simulator']):
    if 'arch' in ARGUMENTS:
      # Print a warning if arch has explicitly been set
      print "Warning: forcing architecture to match simulator (%s)" % options['simulator']
    options['arch'] = options['simulator']


def ParseEnvOverrides(arg):
  # The environment overrides are in the format NAME1:value1,NAME2:value2
  overrides = {}
  for override in arg.split(','):
    pos = override.find(':')
    if pos == -1:
      continue
    overrides[override[:pos].strip()] = override[pos+1:].strip()
  return overrides


def BuildSpecific(env, mode, env_overrides):
  options = {'mode': mode}
  for option in SIMPLE_OPTIONS:
    options[option] = env[option]
  PostprocessOptions(options)

  context = BuildContext(options, env_overrides, samples=SplitList(env['sample']))

  library_flags = context.AddRelevantFlags(os.environ, LIBRARY_FLAGS)
  v8_flags = context.AddRelevantFlags(library_flags, V8_EXTRA_FLAGS)
  mksnapshot_flags = context.AddRelevantFlags(library_flags, MKSNAPSHOT_EXTRA_FLAGS)
  jscre_flags = context.AddRelevantFlags(library_flags, JSCRE_EXTRA_FLAGS)
  dtoa_flags = context.AddRelevantFlags(library_flags, DTOA_EXTRA_FLAGS)
  cctest_flags = context.AddRelevantFlags(v8_flags, CCTEST_EXTRA_FLAGS)
  sample_flags = context.AddRelevantFlags(os.environ, SAMPLE_FLAGS)
  d8_flags = context.AddRelevantFlags(library_flags, D8_FLAGS)

  context.flags = {
    'v8': v8_flags,
    'mksnapshot': mksnapshot_flags,
    'jscre': jscre_flags,
    'dtoa': dtoa_flags,
    'cctest': cctest_flags,
    'sample': sample_flags,
    'd8': d8_flags
  }

  target_id = mode
  suffix = SUFFIXES[target_id]
  library_name = 'v8' + suffix
  env['LIBRARY'] = library_name

  # Build the object files by invoking SCons recursively.  
  (object_files, shell_files, mksnapshot) = env.SConscript(
    join('src', 'SConscript'),
    build_dir=join('obj', target_id),
    exports='context',
    duplicate=False
  )

  context.mksnapshot_targets.append(mksnapshot)

  # Link the object files into a library.
  env.Replace(**context.flags['v8'])
  context.ApplyEnvOverrides(env)
  if context.options['library'] == 'static':
    library = env.StaticLibrary(library_name, object_files)
  else:
    # There seems to be a glitch in the way scons decides where to put
    # PDB files when compiling using MSVC so we specify it manually.
    # This should not affect any other platforms.
    pdb_name = library_name + '.dll.pdb'
    library = env.SharedLibrary(library_name, object_files, PDB=pdb_name)
  context.library_targets.append(library)
  
  d8_env = Environment()
  d8_env.Replace(**context.flags['d8'])
  shell = d8_env.Program('d8' + suffix, object_files + shell_files)
  context.d8_targets.append(shell)

  for sample in context.samples:
    sample_env = Environment(LIBRARY=library_name)
    sample_env.Replace(**context.flags['sample'])
    context.ApplyEnvOverrides(sample_env)
    sample_object = sample_env.SConscript(
      join('samples', 'SConscript'),
      build_dir=join('obj', 'sample', sample, target_id),
      exports='sample context',
      duplicate=False
    )
    sample_name = sample + suffix
    sample_program = sample_env.Program(sample_name, sample_object)
    sample_env.Depends(sample_program, library)
    context.sample_targets.append(sample_program)
  
  cctest_program = env.SConscript(
    join('test', 'cctest', 'SConscript'),
    build_dir=join('obj', 'test', target_id),
    exports='context object_files',
    duplicate=False
  )
  context.cctest_targets.append(cctest_program)
  
  return context


def Build():
  opts = GetOptions()
  env = Environment(options=opts)
  Help(opts.GenerateHelpText(env))
  VerifyOptions(env)
  env_overrides = ParseEnvOverrides(env['env'])

  SourceSignatures(env['sourcesignatures'])

  libraries = []
  mksnapshots = []
  cctests = []
  samples = []
  d8s = []
  modes = SplitList(env['mode'])
  for mode in modes:
    context = BuildSpecific(env.Copy(), mode, env_overrides)
    libraries += context.library_targets
    mksnapshots += context.mksnapshot_targets
    cctests += context.cctest_targets
    samples += context.sample_targets
    d8s += context.d8_targets

  env.Alias('library', libraries)
  env.Alias('mksnapshot', mksnapshots)
  env.Alias('cctests', cctests)
  env.Alias('sample', samples)
  env.Alias('d8', d8s)

  if env['sample']:
    env.Default('sample')
  else:
    env.Default('library')


# We disable deprecation warnings because we need to be able to use
# env.Copy without getting warnings for compatibility with older
# 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()