aboutsummaryrefslogtreecommitdiff
path: root/src/build/common.gypi
blob: b9466a325ad5a37e7e6da7782d2788e23b76ac05 (plain)
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
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
# Copyright 2010 Google Inc. 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.

# IMPORTANT:
# Please don't directly include this file if you are building via gyp_chromium,
# since gyp_chromium is automatically forcing its inclusion.
{
  'variables': {
    # Variables expected to be overriden on the GYP command line (-D) or by
    # ~/.gyp/include.gypi.

    # Putting a variables dict inside another variables dict looks kind of
    # weird. This is necessary to get these variables defined for the conditions
    # within this variables dict that operate on these variables.
    'variables': {
      'variables': {
        # Compute the architecture that we're building on.
        'conditions': [
          [ 'OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
            # This handles the Linux platforms we generally deal with. Anything
            # else gets passed through, which probably won't work very well; such
            # hosts should pass an explicit target_arch to gyp.
            'host_arch%':
              '<!(uname -m | sed -e "s/i.86/ia32/;s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/")',
          }, {  # OS!="linux"
            'host_arch%': 'ia32',
          }],
        ],
      },

      'host_arch%': '<(host_arch)',

      # Default architecture we're building for is the architecture we're
      # building on.
      'target_arch%': '<(host_arch)',

      # This variable tells WebCore.gyp and JavaScriptCore.gyp whether they are
      # are built under a chromium full build (1) or a webkit.org chromium
      # build (0).
      'inside_chromium_build%': 1,

      # Set to 1 compile with -fPIC cflag on linux. This is a must for shared
      # libraries on linux x86-64 and arm.
      'linux_fpic%': 0,

      # Python version.
      'python_ver%': '2.5',

      # Determine ARM compilation flags.
      'arm_version%': 7,

      # Set Neon compilation flags (only meaningful if arm_version==7).
      'arm_neon%': 1,

      # The system root for cross-compiles. Default: none.
      'sysroot%': '',

      # On Linux, we build with sse2 for Chromium builds.
      'disable_sse2%': 0,
    },

    'target_arch%': '<(target_arch)',
    'host_arch%': '<(host_arch)',
    'inside_chromium_build%': '<(inside_chromium_build)',
    'linux_fpic%': '<(linux_fpic)',
    'python_ver%': '<(python_ver)',
    'arm_version%': '<(arm_version)',
    'arm_neon%': '<(arm_neon)',
    'sysroot%': '<(sysroot)',
    'disable_sse2%': '<(disable_sse2)',

    # The release channel that this build targets. This is used to restrict
    # channel-specific build options, like which installer packages to create.
    # The default is 'all', which does no channel-specific filtering.
    'channel%': 'all',

    # Override chromium_mac_pch and set it to 0 to suppress the use of
    # precompiled headers on the Mac.  Prefix header injection may still be
    # used, but prefix headers will not be precompiled.  This is useful when
    # using distcc to distribute a build to compile slaves that don't
    # share the same compiler executable as the system driving the compilation,
    # because precompiled headers rely on pointers into a specific compiler
    # executable's image.  Setting this to 0 is needed to use an experimental
    # Linux-Mac cross compiler distcc farm.
    'chromium_mac_pch%': 1,

    # Mac OS X SDK and deployment target support.
    # The SDK identifies the version of the system headers that will be used,
    # and corresponds to the MAC_OS_X_VERSION_MAX_ALLOWED compile-time macro.
    # "Maximum allowed" refers to the operating system version whose APIs are
    # available in the headers.
    # The deployment target identifies the minimum system version that the
    # built products are expected to function on.  It corresponds to the
    # MAC_OS_X_VERSION_MIN_REQUIRED compile-time macro.
    # To ensure these macros are available, #include <AvailabilityMacros.h>.
    # Additional documentation on these macros is available at
    # http://developer.apple.com/mac/library/technotes/tn2002/tn2064.html#SECTION3
    # Chrome normally builds with the Mac OS X 10.5 SDK and sets the
    # deployment target to 10.5.  Other projects, such as O3D, may override
    # these defaults.
    'mac_sdk%': '10.5',
    'mac_deployment_target%': '10.5',

    # Set to 1 to enable code coverage.  In addition to build changes
    # (e.g. extra CFLAGS), also creates a new target in the src/chrome
    # project file called "coverage".
    # Currently ignored on Windows.
    'coverage%': 0,

    # Although base/allocator lets you select a heap library via an
    # environment variable, the libcmt shim it uses sometimes gets in
    # the way.  To disable it entirely, and switch to normal msvcrt, do e.g.
    #  'win_use_allocator_shim': 0,
    #  'win_release_RuntimeLibrary': 2
    # to ~/.gyp/include.gypi, gclient runhooks --force, and do a release build.
    'win_use_allocator_shim%': 1, # 0 = shim allocator via libcmt; 1 = msvcrt

    # Whether usage of OpenMAX is enabled.
    'enable_openmax%': 0,

    # TODO(bradnelson): eliminate this when possible.
    # To allow local gyp files to prevent release.vsprops from being included.
    # Yes(1) means include release.vsprops.
    # Once all vsprops settings are migrated into gyp, this can go away.
    'msvs_use_common_release%': 1,

    # TODO(bradnelson): eliminate this when possible.
    # To allow local gyp files to override additional linker options for msvs.
    # Yes(1) means set use the common linker options.
    'msvs_use_common_linker_extras%': 1,

    # TODO(sgk): eliminate this if possible.
    # It would be nicer to support this via a setting in 'target_defaults'
    # in chrome/app/locales/locales.gypi overriding the setting in the
    # 'Debug' configuration in the 'target_defaults' dict below,
    # but that doesn't work as we'd like.
    'msvs_debug_link_incremental%': '2',

    # This is the location of the sandbox binary. Chrome looks for this before
    # running the zygote process. If found, and SUID, it will be used to
    # sandbox the zygote process and, thus, all renderer processes.
    'linux_sandbox_path%': '',

    # Set this to true to enable SELinux support.
    'selinux%': 0,

    # Strip the binary after dumping symbols.
    'linux_strip_binary%': 0,

    # Enable TCMalloc.
    'linux_use_tcmalloc%': 1,

    # Disable TCMalloc's debugallocation.
    'linux_use_debugallocation%': 0,

    # Disable TCMalloc's heapchecker.
    'linux_use_heapchecker%': 0,

    # Set to 1 to turn on seccomp sandbox by default.
    # (Note: this is ignored for official builds.)
    'linux_use_seccomp_sandbox%': 0,

    # Set to select the Title Case versions of strings in GRD files.
    'use_titlecase_in_grd%': 0,

    # Used to disable Native Client at compile time, for platforms where it
    # isn't supported
    'disable_nacl%': 0,

    # Set Thumb compilation flags.
    'arm_thumb%': 0,

    # Set ARM fpu compilation flags (only meaningful if arm_version==7 and
    # arm_neon==0).
    'arm_fpu%': 'vfpv3',

    # Enable new NPDevice API.
    'enable_new_npdevice_api%': 0,

    'conditions': [
      # Whether to use multiple cores to compile with visual studio. This is
      # optional because it sometimes causes corruption on VS 2005.
      # It is on by default on VS 2008 and off on VS 2005.
      ['OS=="win"', {
        'conditions': [
          ['MSVS_VERSION=="2005"', {
            'msvs_multi_core_compile%': 0,
          },{
            'msvs_multi_core_compile%': 1,
          }],
          # Don't do incremental linking for large modules on 32-bit.
          ['MSVS_OS_BITS==32', {
            'msvs_large_module_debug_link_mode%': '1',  # No
          },{
            'msvs_large_module_debug_link_mode%': '2',  # Yes
          }],
        ],
        'nacl_win64_defines': [
          # This flag is used to minimize dependencies when building
          # Native Client loader for 64-bit Windows.
          'NACL_WIN64',
        ],
      }],
    ],

    # NOTE: When these end up in the Mac bundle, we need to replace '-' for '_'
    # so Cocoa is happy (http://crbug.com/20441).
    'locales': [
      'am', 'ar', 'bg', 'bn', 'ca', 'cs', 'da', 'de', 'el', 'en-GB',
      'en-US', 'es-419', 'es', 'et', 'fi', 'fil', 'fr', 'gu', 'he',
      'hi', 'hr', 'hu', 'id', 'it', 'ja', 'kn', 'ko', 'lt', 'lv',
      'ml', 'mr', 'nb', 'nl', 'pl', 'pt-BR', 'pt-PT', 'ro', 'ru',
      'sk', 'sl', 'sr', 'sv', 'sw', 'ta', 'te', 'th', 'tr', 'uk',
      'vi', 'zh-CN', 'zh-TW',
    ],
  },
  'target_defaults': {
    'includes': [
      'filename_rules.gypi',
    ],
    'variables': {
      # See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Optimize-Options.html
      'mac_release_optimization%': '3', # Use -O3 unless overridden
      'mac_debug_optimization%': '0',   # Use -O0 unless overridden
      # See http://msdn.microsoft.com/en-us/library/aa652360(VS.71).aspx
      'win_release_Optimization%': '2', # 2 = /Os
      'win_debug_Optimization%': '0',   # 0 = /Od
      # See http://msdn.microsoft.com/en-us/library/aa652367(VS.71).aspx
      'win_release_RuntimeLibrary%': '0', # 0 = /MT (nondebug static)
      'win_debug_RuntimeLibrary%': '1',   # 1 = /MTd (debug static)

      'release_extra_cflags%': '',
      'debug_extra_cflags%': '',
      'release_valgrind_build%': 0,
    },
    'conditions': [
      ['selinux==1', {
        'defines': ['CHROMIUM_SELINUX=1'],
      }],
      ['win_use_allocator_shim==0', {
        'conditions': [
          ['OS=="win"', {
            'defines': ['NO_TCMALLOC'],
          }],
        ],
      }],
      ['coverage!=0', {
        'conditions': [
          ['OS=="mac"', {
            'xcode_settings': {
              'GCC_INSTRUMENT_PROGRAM_FLOW_ARCS': 'YES',  # -fprofile-arcs
              'GCC_GENERATE_TEST_COVERAGE_FILES': 'YES',  # -ftest-coverage
            },
            # Add -lgcov for types executable, shared_library, and
            # loadable_module; not for static_library.
            # This is a delayed conditional.
            'target_conditions': [
              ['_type!="static_library"', {
                'xcode_settings': { 'OTHER_LDFLAGS': [ '-lgcov' ] },
              }],
            ],
          }],
          # Linux gyp (into scons) doesn't like target_conditions?
          # TODO(???): track down why 'target_conditions' doesn't work
          # on Linux gyp into scons like it does on Mac gyp into xcodeproj.
          ['OS=="linux"', {
            'cflags': [ '-ftest-coverage',
                        '-fprofile-arcs' ],
            'link_settings': { 'libraries': [ '-lgcov' ] },
          }],
          # Finally, for Windows, we simply turn on profiling.
          ['OS=="win"', {
            'msvs_settings': {
              'VCLinkerTool': {
                'Profile': 'true',
              },
              'VCCLCompilerTool': {
                # /Z7, not /Zi, so coverage is happyb
                'DebugInformationFormat': '1',
                'AdditionalOptions': ['/Yd'],
              }
            }
         }],  # OS==win
        ],  # conditions for coverage
      }],  # coverage!=0
    ],  # conditions for 'target_defaults'
    'target_conditions': [
      [ 'OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
        'cflags!': [
          '-Wall',
          '-Wextra',
          '-Werror',
        ],
      }],
      [ 'OS=="win"', {
        'defines': [
          '_CRT_SECURE_NO_DEPRECATE',
          '_CRT_NONSTDC_NO_WARNINGS',
          '_CRT_NONSTDC_NO_DEPRECATE',
          # This is required for ATL to use XP-safe versions of its functions.
          '_USING_V110_SDK71_',
        ],
        'msvs_disabled_warnings': [4800],
        'msvs_settings': {
          'VCCLCompilerTool': {
            'WarnAsError': 'true',
            'Detect64BitPortabilityProblems': 'false',
          },
        },
      }],
      [ 'OS=="mac"', {
        'xcode_settings': {
          'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO',
          'WARNING_CFLAGS!': ['-Wall'],
        },
      }],
    ],  # target_conditions for 'target_defaults'
    'default_configuration': 'Debug',
    'configurations': {
      # VCLinkerTool LinkIncremental values below:
      #   0 == default
      #   1 == /INCREMENTAL:NO
      #   2 == /INCREMENTAL
      # Debug links incremental, Release does not.
      #
      # Abstract base configurations to cover common
      # attributes.
      #
      'Common_Base': {
        'abstract': 1,
        'msvs_configuration_attributes': {
          'OutputDirectory': '$(SolutionDir)$(ConfigurationName)',
          'IntermediateDirectory': '$(OutDir)\\obj\\$(ProjectName)',
          'CharacterSet': '1',
        },
      },
      'x86_Base': {
        'abstract': 1,
        'msvs_settings': {
          'VCLinkerTool': {
            'MinimumRequiredVersion': '5.01',  # XP.
            'TargetMachine': '1',
          },
        },
        'msvs_configuration_platform': 'Win32',
      },
      'x64_Base': {
        'abstract': 1,
        'msvs_configuration_platform': 'x64',
        'msvs_settings': {
          'VCLinkerTool': {
            'TargetMachine': '17', # x86 - 64
            'AdditionalLibraryDirectories!':
              ['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
            'AdditionalLibraryDirectories':
              ['<(DEPTH)/third_party/platformsdk_win7/files/Lib/x64'],
          },
          'VCLibrarianTool': {
            'AdditionalLibraryDirectories!':
              ['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
            'AdditionalLibraryDirectories':
              ['<(DEPTH)/third_party/platformsdk_win7/files/Lib/x64'],
          },
        },
        'defines': [
          # Not sure if tcmalloc works on 64-bit Windows.
          'NO_TCMALLOC',
        ],
      },
      'Debug_Base': {
        'abstract': 1,
        'xcode_settings': {
          'COPY_PHASE_STRIP': 'NO',
          'GCC_OPTIMIZATION_LEVEL': '<(mac_debug_optimization)',
          'OTHER_CFLAGS': [ '<@(debug_extra_cflags)', ],
        },
        'msvs_settings': {
          'VCCLCompilerTool': {
            'Optimization': '<(win_debug_Optimization)',
            'PreprocessorDefinitions': ['_DEBUG'],
            'BasicRuntimeChecks': '3',
            'RuntimeLibrary': '<(win_debug_RuntimeLibrary)',
          },
          'VCLinkerTool': {
            'LinkIncremental': '<(msvs_debug_link_incremental)',
          },
          'VCResourceCompilerTool': {
            'PreprocessorDefinitions': ['_DEBUG'],
          },
        },
        'conditions': [
          ['OS=="linux"', {
            'cflags': [
              '<@(debug_extra_cflags)',
            ],
          }],
        ],
      },
      'Release_Base': {
        'abstract': 1,
        'defines': [
          'NDEBUG',
        ],
        'xcode_settings': {
          'DEAD_CODE_STRIPPING': 'YES',  # -Wl,-dead_strip
          'GCC_OPTIMIZATION_LEVEL': '<(mac_release_optimization)',
          'OTHER_CFLAGS': [ '<@(release_extra_cflags)', ],
        },
        'msvs_settings': {
          'VCCLCompilerTool': {
            'Optimization': '<(win_release_Optimization)',
            'RuntimeLibrary': '<(win_release_RuntimeLibrary)',
          },
          'VCLinkerTool': {
            'LinkIncremental': '1',
          },
        },
        'conditions': [
          ['release_valgrind_build==0', {
            'defines': ['NVALGRIND'],
          }],
          ['win_use_allocator_shim==0', {
            'defines': ['NO_TCMALLOC'],
          }],
          ['win_release_RuntimeLibrary==2', {
            # Visual C++ 2008 barfs when building anything with /MD (msvcrt):
            #  VC\include\typeinfo(139) : warning C4275: non dll-interface
            #  class 'stdext::exception' used as base for dll-interface
            #  class 'std::bad_cast'
            'msvs_disabled_warnings': [4275],
          }],
          ['OS=="linux"', {
            'cflags': [
             '<@(release_extra_cflags)',
            ],
          }],
        ],
      },
      'Purify_Base': {
        'abstract': 1,
        'defines': [
          'PURIFY',
          'NO_TCMALLOC',
        ],
        'msvs_settings': {
          'VCCLCompilerTool': {
            'Optimization': '0',
            'RuntimeLibrary': '0',
            'BufferSecurityCheck': 'false',
          },
          'VCLinkerTool': {
            'EnableCOMDATFolding': '1',
            'LinkIncremental': '1',
          },
        },
      },
      #
      # Concrete configurations
      #
      'Debug': {
        'inherit_from': ['Common_Base', 'x86_Base', 'Debug_Base'],
      },
      'Release': {
        'inherit_from': ['Common_Base', 'x86_Base', 'Release_Base'],
        'conditions': [
          ['msvs_use_common_release', {
            'defines': ['OFFICIAL_BUILD'],
            'msvs_settings': {
              'VCCLCompilerTool': {
                'Optimization': '3',
                'StringPooling': 'true',
                'OmitFramePointers': 'true',
                'InlineFunctionExpansion': '2',
                'EnableIntrinsicFunctions': 'true',
                'FavorSizeOrSpeed': '2',
                'OmitFramePointers': 'true',
                'EnableFiberSafeOptimizations': 'true',
                'WholeProgramOptimization': 'true',
              },
              'VCLibrarianTool': {
                'AdditionalOptions': ['/ltcg', '/expectedoutputsize:120000000'],
              },
              'VCLinkerTool': {
                'LinkIncremental': '1',
                'OptimizeReferences': '2',
                'EnableCOMDATFolding': '2',
                'OptimizeForWindows98': '1',
                'LinkTimeCodeGeneration': '1',
              },
            },
          }],
        ]
      },
      'conditions': [
        [ 'OS=="win"', {
          # TODO(bradnelson): add a gyp mechanism to make this more graceful.
          'Purify': {
            'inherit_from': ['Common_Base', 'x86_Base', 'Release_Base', 'Purify'],
          },
          'Debug_x64': {
            'inherit_from': ['Common_Base', 'x64_Base', 'Debug_Base'],
          },
          'Release_x64': {
            'inherit_from': ['Common_Base', 'x64_Base', 'Release_Base'],
          },
          'Purify_x64': {
            'inherit_from': ['Common_Base', 'x64_Base', 'Release_Base', 'Purify_Base'],
          },
        }],
      ],
    },
  },
  'conditions': [
    ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"', {
      'target_defaults': {
        # Enable -Werror by default, but put it in a variable so it can
        # be disabled in ~/.gyp/include.gypi on the valgrind builders.
        'variables': {
          # Use -fno-strict-aliasing by default since gcc 4.4 has periodic
          # issues that slip through the cracks. We could do this just for
          # gcc 4.4 but it makes more sense to be consistent on all
          # compilers in use. TODO(Craig): turn this off again when
          # there is some 4.4 test infrastructure in place and existing
          # aliasing issues have been fixed.
          'no_strict_aliasing%': 1,
          'conditions': [['OS=="linux"', {'werror%': '-Werror',}],
                         ['OS=="freebsd"', {'werror%': '',}],
                         ['OS=="openbsd"', {'werror%': '',}],
          ],
        },
        'cflags': [
          '<(werror)',  # See note above about the werror variable.
          '-pthread',
          '-fno-exceptions',
          '-Wall',
          # TODO(evan): turn this back on once all the builds work.
          # '-Wextra',
          # Don't warn about unused function params.  We use those everywhere.
          '-Wno-unused-parameter',
          # Don't warn about the "struct foo f = {0};" initialization pattern.
          '-Wno-missing-field-initializers',
          '-D_FILE_OFFSET_BITS=64',
          # Don't export any symbols (for example, to plugins we dlopen()).
          # Note: this is *required* to make some plugins work.
          '-fvisibility=hidden',
        ],
        'cflags_cc': [
          '-frtti',
          '-fno-threadsafe-statics',
          # Make inline functions have hidden visiblity by default.
          # Surprisingly, not covered by -fvisibility=hidden.
          '-fvisibility-inlines-hidden',
        ],
        'ldflags': [
          '-pthread', '-Wl,-z,noexecstack',
        ],
        'scons_variable_settings': {
          'LIBPATH': ['$LIB_DIR'],
          # Linking of large files uses lots of RAM, so serialize links
          # using the handy flock command from util-linux.
          'FLOCK_LINK': ['flock', '$TOP_BUILDDIR/linker.lock', '$LINK'],
          'FLOCK_SHLINK': ['flock', '$TOP_BUILDDIR/linker.lock', '$SHLINK'],
          'FLOCK_LDMODULE': ['flock', '$TOP_BUILDDIR/linker.lock', '$LDMODULE'],

          # We have several cases where archives depend on each other in
          # a cyclic fashion.  Since the GNU linker does only a single
          # pass over the archives we surround the libraries with
          # --start-group and --end-group (aka -( and -) ). That causes
          # ld to loop over the group until no more undefined symbols
          # are found. In an ideal world we would only make groups from
          # those libraries which we knew to be in cycles. However,
          # that's tough with SCons, so we bodge it by making all the
          # archives a group by redefining the linking command here.
          #
          # TODO:  investigate whether we still have cycles that
          # require --{start,end}-group.  There has been a lot of
          # refactoring since this was first coded, which might have
          # eliminated the circular dependencies.
          #
          # Note:  $_LIBDIRFLAGS comes before ${LINK,SHLINK,LDMODULE}FLAGS
          # so that we prefer our own built libraries (e.g. -lpng) to
          # system versions of libraries that pkg-config might turn up.
          # TODO(sgk): investigate handling this not by re-ordering the
          # flags this way, but by adding a hook to use the SCons
          # ParseFlags() option on the output from pkg-config.
          'LINKCOM': [['$FLOCK_LINK', '-o', '$TARGET',
                       '$_LIBDIRFLAGS', '$LINKFLAGS', '$SOURCES',
                       '-Wl,--start-group', '$_LIBFLAGS', '-Wl,--end-group']],
          'SHLINKCOM': [['$FLOCK_SHLINK', '-o', '$TARGET',
                         '$_LIBDIRFLAGS', '$SHLINKFLAGS', '$SOURCES',
                         '-Wl,--start-group', '$_LIBFLAGS', '-Wl,--end-group']],
          'LDMODULECOM': [['$FLOCK_LDMODULE', '-o', '$TARGET',
                           '$_LIBDIRFLAGS', '$LDMODULEFLAGS', '$SOURCES',
                           '-Wl,--start-group', '$_LIBFLAGS', '-Wl,--end-group']],
          'IMPLICIT_COMMAND_DEPENDENCIES': 0,
        },
        'scons_import_variables': [
          'AS',
          'CC',
          'CXX',
          'LINK',
        ],
        'scons_propagate_variables': [
          'AS',
          'CC',
          'CCACHE_DIR',
          'CXX',
          'DISTCC_DIR',
          'DISTCC_HOSTS',
          'HOME',
          'INCLUDE_SERVER_ARGS',
          'INCLUDE_SERVER_PORT',
          'LINK',
          'CHROME_BUILD_TYPE',
          'CHROMIUM_BUILD',
          'OFFICIAL_BUILD',
        ],
        'configurations': {
          'Debug_Base': {
            'variables': {
              'debug_optimize%': '0',
            },
            'defines': [
              '_DEBUG',
            ],
            'cflags': [
              '-O>(debug_optimize)',
              '-g',
              # One can use '-gstabs' to enable building the debugging
              # information in STABS format for breakpad's dumpsyms.
            ],
            'ldflags': [
              '-rdynamic',  # Allows backtrace to resolve symbols.
            ],
          },
          'Release_Base': {
            'variables': {
              'release_optimize%': '2',
            },
            'cflags': [
              '-O>(release_optimize)',
              # Don't emit the GCC version ident directives, they just end up
              # in the .comment section taking up binary size.
              '-fno-ident',
              # Put data and code in their own sections, so that unused symbols
              # can be removed at link time with --gc-sections.
              '-fdata-sections',
              '-ffunction-sections',
            ],
            'ldflags': [
              '-Wl,--gc-sections',
            ],
          },
        },
        'variants': {
          'coverage': {
            'cflags': ['-fprofile-arcs', '-ftest-coverage'],
            'ldflags': ['-fprofile-arcs'],
          },
          'profile': {
            'cflags': ['-pg', '-g'],
            'ldflags': ['-pg'],
          },
          'symbols': {
            'cflags': ['-g'],
          },
        },
        'conditions': [
          [ 'target_arch=="ia32"', {
            'asflags': [
              # Needed so that libs with .s files (e.g. libicudata.a)
              # are compatible with the general 32-bit-ness.
              '-32',
            ],
            # All floating-point computations on x87 happens in 80-bit
            # precision.  Because the C and C++ language standards allow
            # the compiler to keep the floating-point values in higher
            # precision than what's specified in the source and doing so
            # is more efficient than constantly rounding up to 64-bit or
            # 32-bit precision as specified in the source, the compiler,
            # especially in the optimized mode, tries very hard to keep
            # values in x87 floating-point stack (in 80-bit precision)
            # as long as possible. This has important side effects, that
            # the real value used in computation may change depending on
            # how the compiler did the optimization - that is, the value
            # kept in 80-bit is different than the value rounded down to
            # 64-bit or 32-bit. There are possible compiler options to make
            # this behavior consistent (e.g. -ffloat-store would keep all
            # floating-values in the memory, thus force them to be rounded
            # to its original precision) but they have significant runtime
            # performance penalty.
            #
            # -mfpmath=sse -msse2 makes the compiler use SSE instructions
            # which keep floating-point values in SSE registers in its
            # native precision (32-bit for single precision, and 64-bit for
            # double precision values). This means the floating-point value
            # used during computation does not change depending on how the
            # compiler optimized the code, since the value is always kept
            # in its specified precision.
            'conditions': [
              ['disable_sse2==0', {
                'cflags': [
                  '-march=pentium4',
                  '-msse2',
                  '-mfpmath=sse',
                ],
              }],
            ],
            # -mmmx allows mmintrin.h to be used for mmx intrinsics.
            # video playback is mmx and sse2 optimized.
            'cflags': [
              '-m32',
              '-mmmx',
            ],
            'ldflags': [
              '-m32',
            ],
          }],
          ['target_arch=="arm"', {
            'target_conditions': [
              ['_toolset=="target"', {
                'cflags_cc': [
                  # The codesourcery arm-2009q3 toolchain warns at that the ABI
                  # has changed whenever it encounters a varargs function. This
                  # silences those warnings, as they are not helpful and
                  # clutter legitimate warnings.
                  '-Wno-abi',
                ],
                'conditions': [
                  ['arm_thumb == 1', {
                    'cflags': [
                    '-mthumb',
                    # TODO(piman): -Wa,-mimplicit-it=thumb is needed for
                    # inline assembly that uses condition codes but it's
                    # suboptimal. Better would be to #ifdef __thumb__ at the
                    # right place and have a separate thumb path.
                    '-Wa,-mimplicit-it=thumb',
                    ]
                  }],
                  ['arm_version==7', {
                    'cflags': [
                      '-march=armv7-a',
                      '-mtune=cortex-a8',
                      '-mfloat-abi=softfp',
                    ],
                    'conditions': [
                      ['arm_neon==1', {
                        'cflags': [ '-mfpu=neon', ],
                      }, {
                        'cflags': [ '-mfpu=<(arm_fpu)', ],
                      }]
                    ],
                  }],
                ],
              }],
            ],
          }],
          ['linux_fpic==1', {
            'cflags': [
              '-fPIC',
            ],
          }],
          ['sysroot!=""', {
            'target_conditions': [
              ['_toolset=="target"', {
                'cflags': [
                  '--sysroot=<(sysroot)',
                ],
                'ldflags': [
                  '--sysroot=<(sysroot)',
                ],
              }]]
          }],
          ['no_strict_aliasing==1', {
            'cflags': [
              '-fno-strict-aliasing',
            ],
          }],
          ['linux_use_heapchecker==1', {
            'variables': {'linux_use_tcmalloc%': 1},
          }],
          ['linux_use_tcmalloc==0', {
            'defines': ['NO_TCMALLOC'],
          }],
          ['linux_use_heapchecker==0', {
            'defines': ['NO_HEAPCHECKER'],
          }],
        ],
      },
    }],
    # FreeBSD-specific options; note that most FreeBSD options are set above,
    # with Linux.
    ['OS=="freebsd"', {
      'target_defaults': {
        'ldflags': [
          '-Wl,--no-keep-memory',
        ],
      },
    }],
    ['OS=="solaris"', {
      'cflags!': ['-fvisibility=hidden'],
      'cflags_cc!': ['-fvisibility-inlines-hidden'],
    }],
    ['OS=="mac"', {
      'target_defaults': {
        'variables': {
          # This should be 'mac_real_dsym%', but there seems to be a bug
          # with % in variables that are intended to be set to different
          # values in different targets, like this one.
          'mac_real_dsym': 0,  # Fake .dSYMs are fine in most cases.
        },
        'mac_bundle': 0,
        'xcode_settings': {
          'ALWAYS_SEARCH_USER_PATHS': 'NO',
          'GCC_C_LANGUAGE_STANDARD': 'c99',         # -std=c99
          'GCC_CW_ASM_SYNTAX': 'NO',                # No -fasm-blocks
          'GCC_DYNAMIC_NO_PIC': 'NO',               # No -mdynamic-no-pic
                                                    # (Equivalent to -fPIC)
          'GCC_ENABLE_CPP_EXCEPTIONS': 'NO',        # -fno-exceptions
          'GCC_ENABLE_CPP_RTTI': 'YES',             # -frtti
          'GCC_ENABLE_PASCAL_STRINGS': 'NO',        # No -mpascal-strings
          # GCC_INLINES_ARE_PRIVATE_EXTERN maps to -fvisibility-inlines-hidden
          'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES',
          'GCC_OBJC_CALL_CXX_CDTORS': 'YES',        # -fobjc-call-cxx-cdtors
          'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',      # -fvisibility=hidden
          'GCC_THREADSAFE_STATICS': 'NO',           # -fno-threadsafe-statics
          'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES',    # -Werror
          'GCC_VERSION': '4.2',
          'GCC_WARN_ABOUT_MISSING_NEWLINE': 'YES',  # -Wnewline-eof
          # MACOSX_DEPLOYMENT_TARGET maps to -mmacosx-version-min
          'MACOSX_DEPLOYMENT_TARGET': '<(mac_deployment_target)',
          'PREBINDING': 'NO',                       # No -Wl,-prebind
          'USE_HEADERMAP': 'NO',
          'WARNING_CFLAGS': ['-Wall', '-Wendif-labels'],
          'conditions': [
            ['chromium_mac_pch', {'GCC_PRECOMPILE_PREFIX_HEADER': 'YES'},
                                 {'GCC_PRECOMPILE_PREFIX_HEADER': 'NO'}
            ],
          ],
        },
        'target_conditions': [
          ['_type!="static_library"', {
            'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-search_paths_first']},
          }],
          ['_mac_bundle', {
            'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
          }],
        ],  # target_conditions
      },  # target_defaults
    }],  # OS=="mac"
    ['OS=="win"', {
      'target_defaults': {
        'defines': [
          '_WIN32_WINNT=0x0600',
          'WINVER=0x0600',
          'WIN32',
          '_WINDOWS',
          '_HAS_EXCEPTIONS=0',
          'NOMINMAX',
          '_CRT_RAND_S',
          'CERT_CHAIN_PARA_HAS_EXTRA_FIELDS',
          'WIN32_LEAN_AND_MEAN',
          '_SECURE_ATL',
          '_HAS_TR1=0',
        ],
        'msvs_system_include_dirs': [
          '<(DEPTH)/third_party/platformsdk_win7/files/Include',
          '$(VSInstallDir)/VC/atlmfc/include',
        ],
        'msvs_cygwin_dirs': ['<(DEPTH)/third_party/cygwin'],
        'msvs_disabled_warnings': [
          4100, 4127, 4396, 4503, 4512, 4819, 4995, 4702
        ],
        'msvs_settings': {
          'VCCLCompilerTool': {
            'MinimalRebuild': 'false',
            'ExceptionHandling': '0',
            'BufferSecurityCheck': 'true',
            'EnableFunctionLevelLinking': 'true',
            'RuntimeTypeInfo': 'false',
            'WarningLevel': '4',
            'WarnAsError': 'true',
            'DebugInformationFormat': '3',
            'conditions': [
              [ 'msvs_multi_core_compile', {
                'AdditionalOptions': ['/MP'],
              }],
            ],
          },
          'VCLibrarianTool': {
            'AdditionalOptions': ['/ignore:4221'],
            'AdditionalLibraryDirectories':
              ['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
          },
          'VCLinkerTool': {
            'AdditionalDependencies': [
              'wininet.lib',
              'version.lib',
              'msimg32.lib',
              'ws2_32.lib',
              'usp10.lib',
              'psapi.lib',
              'dbghelp.lib',
            ],
            'AdditionalLibraryDirectories':
              ['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
            'GenerateDebugInformation': 'true',
            'MapFileName': '$(OutDir)\\$(TargetName).map',
            'ImportLibrary': '$(OutDir)\\lib\\$(TargetName).lib',
            'FixedBaseAddress': '1',
            # SubSystem values:
            #   0 == not set
            #   1 == /SUBSYSTEM:CONSOLE
            #   2 == /SUBSYSTEM:WINDOWS
            # Most of the executables we'll ever create are tests
            # and utilities with console output.
            'SubSystem': '1',
          },
          'VCMIDLTool': {
            'GenerateStublessProxies': 'true',
            'TypeLibraryName': '$(InputName).tlb',
            'OutputDirectory': '$(IntDir)',
            'HeaderFileName': '$(InputName).h',
            'DLLDataFileName': 'dlldata.c',
            'InterfaceIdentifierFileName': '$(InputName)_i.c',
            'ProxyFileName': '$(InputName)_p.c',
          },
          'VCResourceCompilerTool': {
            'Culture' : '1033',
            'AdditionalIncludeDirectories': ['<(DEPTH)'],
          },
        },
      },
    }],
    ['disable_nacl==1 or OS=="freebsd" or OS=="openbsd" or OS=="solaris"', {
      'target_defaults': {
        'defines': [
          'DISABLE_NACL',
        ],
      },
    }],
    ['OS=="win" and msvs_use_common_linker_extras', {
      'target_defaults': {
        'msvs_settings': {
          'VCLinkerTool': {
            'DelayLoadDLLs': [
              'dbghelp.dll',
              'dwmapi.dll',
              'uxtheme.dll',
            ],
          },
        },
        'configurations': {
          'x86_Base': {
            'msvs_settings': {
              'VCLinkerTool': {
                'AdditionalOptions': [
                  '/safeseh',
                  '/dynamicbase',
                  '/ignore:4199',
                  '/ignore:4221',
                  '/nxcompat',
                ],
              },
            },
          },
          'x64_Base': {
            'msvs_settings': {
              'VCLinkerTool': {
                'AdditionalOptions': [
                  # safeseh is not compatible with x64
                  '/dynamicbase',
                  '/ignore:4199',
                  '/ignore:4221',
                  '/nxcompat',
                ],
              },
            },
          },
        },
      },
    }],
    ['enable_new_npdevice_api==1', {
      'target_defaults': {
        'defines': [
          'ENABLE_NEW_NPDEVICE_API',
        ],
      },
    }],
  ],
  'scons_settings': {
    'sconsbuild_dir': '<(DEPTH)/sconsbuild',
    'tools': ['ar', 'as', 'gcc', 'g++', 'gnulink', 'chromium_builders'],
  },
  'xcode_settings': {
    # DON'T ADD ANYTHING NEW TO THIS BLOCK UNLESS YOU REALLY REALLY NEED IT!
    # This block adds *project-wide* configuration settings to each project
    # file.  It's almost always wrong to put things here.  Specify your
    # custom xcode_settings in target_defaults to add them to targets instead.

    # In an Xcode Project Info window, the "Base SDK for All Configurations"
    # setting sets the SDK on a project-wide basis.  In order to get the
    # configured SDK to show properly in the Xcode UI, SDKROOT must be set
    # here at the project level.
    'SDKROOT': 'macosx<(mac_sdk)',  # -isysroot

    # The Xcode generator will look for an xcode_settings section at the root
    # of each dict and use it to apply settings on a file-wide basis.  Most
    # settings should not be here, they should be in target-specific
    # xcode_settings sections, or better yet, should use non-Xcode-specific
    # settings in target dicts.  SYMROOT is a special case, because many other
    # Xcode variables depend on it, including variables such as
    # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
    # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
    # files to appear (when present) in the UI as actual files and not red
    # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
    # and therefore SYMROOT, needs to be set at the project level.
    'SYMROOT': '<(DEPTH)/xcodebuild',
  },
}