forked from mozilla/gecko-dev
-
Notifications
You must be signed in to change notification settings - Fork 1
/
toolchain.configure
executable file
·1248 lines (1047 loc) · 46.8 KB
/
toolchain.configure
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
# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
# PGO
# ==============================================================
option(env='MOZ_PGO', help='Build with profile guided optimizations')
set_config('MOZ_PGO', depends('MOZ_PGO')(lambda x: bool(x)))
add_old_configure_assignment('MOZ_PGO', depends('MOZ_PGO')(lambda x: bool(x)))
# yasm detection
# ==============================================================
yasm = check_prog('YASM', ['yasm'], allow_missing=True)
@depends_if(yasm)
@checking('yasm version')
def yasm_version(yasm):
version = check_cmd_output(
yasm, '--version',
onerror=lambda: die('Failed to get yasm version.')
).splitlines()[0].split()[1]
return Version(version)
# Until we move all the yasm consumers out of old-configure.
# bug 1257904
add_old_configure_assignment('_YASM_MAJOR_VERSION',
yasm_version.major)
add_old_configure_assignment('_YASM_MINOR_VERSION',
yasm_version.minor)
@depends(yasm, target)
def yasm_asflags(yasm, target):
if yasm:
asflags = {
('OSX', 'x86'): '-f macho32',
('OSX', 'x86_64'): '-f macho64',
('WINNT', 'x86'): '-f win32',
('WINNT', 'x86_64'): '-f x64',
}.get((target.os, target.cpu), None)
if asflags is None:
# We're assuming every x86 platform we support that's
# not Windows or Mac is ELF.
if target.cpu == 'x86':
asflags = '-f elf32'
elif target.cpu == 'x86_64':
asflags = '-f elf64'
if asflags:
asflags += ' -rnasm -pnasm'
return asflags
set_config('YASM_ASFLAGS', yasm_asflags)
@depends(yasm_asflags)
def have_yasm(value):
if value:
return True
set_config('HAVE_YASM', have_yasm)
# Until the YASM variable is not necessary in old-configure.
add_old_configure_assignment('YASM', have_yasm)
# Android NDK
# ==============================================================
@depends('--disable-compile-environment', build_project, '--help')
def compiling_android(compile_env, build_project, _):
return compile_env and build_project in ('mobile/android', 'js')
include('android-ndk.configure', when=compiling_android)
# MacOS deployment target version
# ==============================================================
# This needs to happen before any compilation test is done.
option('--enable-macos-target', env='MACOSX_DEPLOYMENT_TARGET', nargs=1,
default='10.7', help='Set the minimum MacOS version needed at runtime')
@depends('--enable-macos-target', target)
@imports(_from='os', _import='environ')
def macos_target(value, target):
if value and target.os == 'OSX':
# Ensure every compiler process we spawn uses this value.
environ['MACOSX_DEPLOYMENT_TARGET'] = value[0]
return value[0]
if value and value.origin != 'default':
die('--enable-macos-target cannot be used when targeting %s',
target.os)
set_config('MACOSX_DEPLOYMENT_TARGET', macos_target)
add_old_configure_assignment('MACOSX_DEPLOYMENT_TARGET', macos_target)
# Compiler wrappers
# ==============================================================
# Normally, we'd use js_option and automatically have those variables
# propagated to js/src, but things are complicated by possible additional
# wrappers in CC/CXX, and by other subconfigures that do not handle those
# options and do need CC/CXX altered.
option('--with-compiler-wrapper', env='COMPILER_WRAPPER', nargs=1,
help='Enable compiling with wrappers such as distcc and ccache')
option('--with-ccache', env='CCACHE', nargs='?',
help='Enable compiling with ccache')
@depends_if('--with-ccache')
def ccache(value):
if len(value):
return value
# If --with-ccache was given without an explicit value, we default to
# 'ccache'.
return 'ccache'
ccache = check_prog('CCACHE', progs=(), input=ccache)
# Distinguish ccache from sccache.
@depends_if(ccache)
def ccache_is_sccache(ccache):
return check_cmd_output(ccache, '--version').startswith('sccache')
@depends(ccache, ccache_is_sccache)
def using_ccache(ccache, ccache_is_sccache):
return ccache and not ccache_is_sccache
@depends_if(ccache, ccache_is_sccache)
def using_sccache(ccache, ccache_is_sccache):
return ccache and ccache_is_sccache
set_config('MOZ_USING_CCACHE', using_ccache)
set_config('MOZ_USING_SCCACHE', using_sccache)
option(env='SCCACHE_VERBOSE_STATS', help='Print verbose sccache stats after build')
@depends(using_sccache, 'SCCACHE_VERBOSE_STATS')
def sccache_verbose_stats(using_sccache, verbose_stats):
return using_sccache and bool(verbose_stats)
set_config('SCCACHE_VERBOSE_STATS', sccache_verbose_stats)
@depends('--with-compiler-wrapper', ccache)
@imports(_from='mozbuild.shellutil', _import='split', _as='shell_split')
def compiler_wrapper(wrapper, ccache):
if wrapper:
raw_wrapper = wrapper[0]
wrapper = shell_split(raw_wrapper)
wrapper_program = find_program(wrapper[0])
if not wrapper_program:
die('Cannot find `%s` from the given compiler wrapper `%s`',
wrapper[0], raw_wrapper)
wrapper[0] = wrapper_program
if ccache:
if wrapper:
return tuple([ccache] + wrapper)
else:
return (ccache,)
elif wrapper:
return tuple(wrapper)
add_old_configure_assignment('COMPILER_WRAPPER', compiler_wrapper)
@depends_if(compiler_wrapper)
def using_compiler_wrapper(compiler_wrapper):
return True
set_config('MOZ_USING_COMPILER_WRAPPER', using_compiler_wrapper)
# GC rooting and hazard analysis.
# ==============================================================
option(env='MOZ_HAZARD', help='Build for the GC rooting hazard analysis')
@depends('MOZ_HAZARD')
def hazard_analysis(value):
if value:
return True
set_config('MOZ_HAZARD', hazard_analysis)
# Cross-compilation related things.
# ==============================================================
js_option('--with-toolchain-prefix', env='TOOLCHAIN_PREFIX', nargs=1,
help='Prefix for the target toolchain')
@depends('--with-toolchain-prefix', target, cross_compiling)
def toolchain_prefix(value, target, cross_compiling):
if value:
return tuple(value)
if cross_compiling:
return ('%s-' % target.toolchain, '%s-' % target.alias)
@depends(toolchain_prefix, target)
def first_toolchain_prefix(toolchain_prefix, target):
# Pass TOOLCHAIN_PREFIX down to the build system if it was given from the
# command line/environment (in which case there's only one value in the tuple),
# or when cross-compiling for Android.
if toolchain_prefix and (target.os == 'Android' or len(toolchain_prefix) == 1):
return toolchain_prefix[0]
set_config('TOOLCHAIN_PREFIX', first_toolchain_prefix)
add_old_configure_assignment('TOOLCHAIN_PREFIX', first_toolchain_prefix)
# Compilers
# ==============================================================
include('compilers-util.configure')
def try_preprocess(compiler, language, source):
return try_invoke_compiler(compiler, language, source, ['-E'])
@imports(_from='mozbuild.configure.constants', _import='CompilerType')
@imports(_from='mozbuild.configure.constants',
_import='CPU_preprocessor_checks')
@imports(_from='mozbuild.configure.constants',
_import='kernel_preprocessor_checks')
@imports(_from='textwrap', _import='dedent')
def get_compiler_info(compiler, language):
'''Returns information about the given `compiler` (command line in the
form of a list or tuple), in the given `language`.
The returned information includes:
- the compiler type (msvc, clang-cl, clang or gcc)
- the compiler version
- the compiler supported language
- the compiler supported language version
'''
# Note: MSVC doesn't expose __STDC_VERSION__. It does expose __STDC__,
# but only when given the -Za option, which disables compiler
# extensions.
# Note: We'd normally do a version check for clang, but versions of clang
# in Xcode have a completely different versioning scheme despite exposing
# the version with the same defines.
# So instead, we make things such that the version is missing when the
# clang used is below the minimum supported version (currently clang 3.6).
# We then only include the version information when the C++ compiler
# matches the feature check, so that an unsupported version of clang would
# have no version number.
check = dedent('''\
#if defined(_MSC_VER)
#if defined(__clang__)
%COMPILER "clang-cl"
%VERSION _MSC_FULL_VER
#else
%COMPILER "msvc"
%VERSION _MSC_FULL_VER
#endif
#elif defined(__clang__)
%COMPILER "clang"
# if !__cplusplus || __has_feature(cxx_alignof)
%VERSION __clang_major__.__clang_minor__.__clang_patchlevel__
# endif
#elif defined(__GNUC__)
%COMPILER "gcc"
%VERSION __GNUC__.__GNUC_MINOR__.__GNUC_PATCHLEVEL__
#endif
#if __cplusplus
%cplusplus __cplusplus
#elif __STDC_VERSION__
%STDC_VERSION __STDC_VERSION__
#elif __STDC__
%STDC_VERSION 198900L
#endif
''')
# While we're doing some preprocessing, we might as well do some more
# preprocessor-based tests at the same time, to check the toolchain
# matches what we want.
for name, preprocessor_checks in (
('CPU', CPU_preprocessor_checks),
('KERNEL', kernel_preprocessor_checks),
):
for n, (value, condition) in enumerate(preprocessor_checks.iteritems()):
check += dedent('''\
#%(if)s %(condition)s
%%%(name)s "%(value)s"
''' % {
'if': 'elif' if n else 'if',
'condition': condition,
'name': name,
'value': value,
})
check += '#endif\n'
# Also check for endianness. The advantage of living in modern times is
# that all the modern compilers we support now have __BYTE_ORDER__ defined
# by the preprocessor, except MSVC, which only supports little endian.
check += dedent('''\
#if _MSC_VER || __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
%ENDIANNESS "little"
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
%ENDIANNESS "big"
#endif
''')
result = try_preprocess(compiler, language, check)
if not result:
raise FatalCheckError(
'Unknown compiler or compiler not supported.')
# Metadata emitted by preprocessors such as GCC with LANG=ja_JP.utf-8 may
# have non-ASCII characters. Treat the output as bytearray.
data = {}
for line in result.splitlines():
if line.startswith(b'%'):
k, _, v = line.partition(' ')
k = k.lstrip('%')
data[k] = v.replace(' ', '').lstrip('"').rstrip('"')
log.debug('%s = %s', k, data[k])
try:
type = CompilerType(data['COMPILER'])
except:
raise FatalCheckError(
'Unknown compiler or compiler not supported.')
cplusplus = int(data.get('cplusplus', '0L').rstrip('L'))
stdc_version = int(data.get('STDC_VERSION', '0L').rstrip('L'))
version = data.get('VERSION')
if version and type in ('msvc', 'clang-cl'):
msc_ver = version
version = msc_ver[0:2]
if len(msc_ver) > 2:
version += '.' + msc_ver[2:4]
if len(msc_ver) > 4:
version += '.' + msc_ver[4:]
if version:
version = Version(version)
return namespace(
type=type,
version=version,
cpu=data.get('CPU'),
kernel=data.get('KERNEL'),
endianness=data.get('ENDIANNESS'),
language='C++' if cplusplus else 'C',
language_version=cplusplus if cplusplus else stdc_version,
)
@imports(_from='mozbuild.shellutil', _import='quote')
def check_compiler(compiler, language, target):
info = get_compiler_info(compiler, language)
flags = []
def append_flag(flag):
if flag not in flags:
if info.type == 'clang-cl':
flags.append('-Xclang')
flags.append(flag)
# Check language standards
# --------------------------------------------------------------------
if language != info.language:
raise FatalCheckError(
'`%s` is not a %s compiler.' % (quote(*compiler), language))
# Note: We do a strict version check because there sometimes are backwards
# incompatible changes in the standard, and not all code that compiles as
# C99 compiles as e.g. C11 (as of writing, this is true of libnestegg, for
# example)
if info.language == 'C' and info.language_version != 199901:
if info.type in ('clang-cl', 'clang', 'gcc'):
append_flag('-std=gnu99')
# Note: MSVC, while supporting C++11, still reports 199711L for __cplusplus.
# Note: this is a strict version check because we used to always add
# -std=gnu++11.
if info.language == 'C++':
if info.type in ('clang', 'gcc') and info.language_version != 201103:
append_flag('-std=gnu++11')
# MSVC 2015 headers include C++14 features, but don't guard them
# with appropriate checks.
if info.type == 'clang-cl' and info.language_version != 201402:
append_flag('-std=c++14')
# We force clang-cl to emulate Visual C++ 2015 Update 3.
if info.type == 'clang-cl' and info.version != '19.00.24213':
# This flag is a direct clang-cl flag that doesn't need -Xclang,
# add it directly.
flags.append('-fms-compatibility-version=19.00.24213')
# Check compiler target
# --------------------------------------------------------------------
if not info.cpu or info.cpu != target.cpu:
if info.type == 'clang':
append_flag('--target=%s' % target.toolchain)
elif info.type == 'gcc':
same_arch_different_bits = (
('x86', 'x86_64'),
('ppc', 'ppc64'),
('sparc', 'sparc64'),
)
if (target.cpu, info.cpu) in same_arch_different_bits:
append_flag('-m32')
elif (info.cpu, target.cpu) in same_arch_different_bits:
append_flag('-m64')
if not info.kernel or info.kernel != target.kernel:
if info.type == 'clang':
append_flag('--target=%s' % target.toolchain)
if not info.endianness or info.endianness != target.endianness:
if info.type == 'clang':
append_flag('--target=%s' % target.toolchain)
return namespace(
type=info.type,
version=info.version,
target_cpu=info.cpu,
target_kernel=info.kernel,
target_endianness=info.endianness,
flags=flags,
)
@imports(_from='__builtin__', _import='open')
@imports('json')
@imports('subprocess')
@imports('sys')
def get_vc_paths(topsrcdir):
def vswhere(args):
encoding = 'mbcs' if sys.platform == 'win32' else 'utf-8'
return json.loads(subprocess.check_output([os.path.join(topsrcdir, 'build/win32/vswhere.exe'), '-format', 'json'] + args).decode(encoding, 'replace'))
# Can't pass -requires with -legacy, so query each separately.
# Legacy versions first (VS2015)
for install in vswhere(['-legacy', '-version', '[14.0,15.0)']):
version = Version(install['installationVersion'])
# Skip anything older than VS2015.
if version < '14':
continue
path = install['installationPath']
yield (Version(install['installationVersion']), {
'x64': [os.path.join(path, r'VC\bin\amd64')],
# The x64->x86 cross toolchain requires DLLs from the native x64 toolchain.
'x86': [os.path.join(path, r'VC\bin\amd64_x86'), os.path.join(path, r'VC\bin\amd64')],
})
# Then VS2017 and newer.
for install in vswhere(['-requires', 'Microsoft.VisualStudio.Component.VC.Tools.x86.x64']):
path = install['installationPath']
tools_version = open(os.path.join(path, r'VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt'), 'rb').read().strip()
tools_path = os.path.join(path, r'VC\Tools\MSVC', tools_version, r'bin\HostX64')
yield (Version(install['installationVersion']), {
'x64': [os.path.join(tools_path, 'x64')],
# The x64->x86 cross toolchain requires DLLs from the native x64 toolchain.
'x86': [os.path.join(tools_path, 'x86'), os.path.join(tools_path, 'x64')],
})
option('--with-visual-studio-version', nargs=1,
choices=('2015', '2017'),
help='Select a specific Visual Studio version to use')
@depends('--with-visual-studio-version')
def vs_major_version(value):
if value:
return {'2015': 14,
'2017': 15}[value[0]]
@depends(host, target, vs_major_version, check_build_environment, '--with-visual-studio-version')
@imports(_from='__builtin__', _import='sorted')
@imports(_from='operator', _import='itemgetter')
@imports('platform')
def vc_compiler_path(host, target, vs_major_version, env, vs_release_name):
if host.kernel != 'WINNT':
return
vc_target = {
'x86': 'x86',
'x86_64': 'x64',
'arm': 'arm',
}.get(target.cpu)
if vc_target is None:
return
all_versions = sorted(get_vc_paths(env.topsrcdir), key=itemgetter(0))
if not all_versions:
return
if vs_major_version:
versions = [d for (v, d) in all_versions if v.major == vs_major_version]
if not versions:
die('Visual Studio %s could not be found!' % vs_release_name)
data = versions[0]
else:
# Choose the newest version.
data = all_versions[-1][1]
paths = data.get(vc_target)
if not paths:
return
return paths
@depends(vc_compiler_path)
@imports('os')
def toolchain_search_path(vc_compiler_path):
if vc_compiler_path:
result = [os.environ.get('PATH')]
result.extend(vc_compiler_path)
# We're going to alter PATH for good in windows.configure, but we also
# need to do it for the valid_compiler() check below.
os.environ['PATH'] = os.pathsep.join(result)
return result
@template
def default_c_compilers(host_or_target):
'''Template defining the set of default C compilers for the host and
target platforms.
`host_or_target` is either `host` or `target` (the @depends functions
from init.configure.
'''
assert host_or_target in (host, target)
@depends(host_or_target, target, toolchain_prefix)
def default_c_compilers(host_or_target, target, toolchain_prefix):
gcc = ('gcc',)
if toolchain_prefix and host_or_target is target:
gcc = tuple('%sgcc' % p for p in toolchain_prefix) + gcc
if host_or_target.kernel == 'WINNT':
return ('cl', 'clang-cl') + gcc + ('clang',)
if host_or_target.kernel == 'Darwin':
return ('clang',)
return gcc + ('clang',)
return default_c_compilers
@template
def default_cxx_compilers(c_compiler):
'''Template defining the set of default C++ compilers for the host and
target platforms.
`c_compiler` is the @depends function returning a Compiler instance for
the desired platform.
Because the build system expects the C and C++ compilers to be from the
same compiler suite, we derive the default C++ compilers from the C
compiler that was found if none was provided.
'''
@depends(c_compiler)
def default_cxx_compilers(c_compiler):
dir = os.path.dirname(c_compiler.compiler)
file = os.path.basename(c_compiler.compiler)
if c_compiler.type == 'gcc':
return (os.path.join(dir, file.replace('gcc', 'g++')),)
if c_compiler.type == 'clang':
return (os.path.join(dir, file.replace('clang', 'clang++')),)
return (c_compiler.compiler,)
return default_cxx_compilers
@template
def compiler(language, host_or_target, c_compiler=None, other_compiler=None,
other_c_compiler=None):
'''Template handling the generic base checks for the compiler for the
given `language` on the given platform (`host_or_target`).
`host_or_target` is either `host` or `target` (the @depends functions
from init.configure.
When the language is 'C++', `c_compiler` is the result of the `compiler`
template for the language 'C' for the same `host_or_target`.
When `host_or_target` is `host`, `other_compiler` is the result of the
`compiler` template for the same `language` for `target`.
When `host_or_target` is `host` and the language is 'C++',
`other_c_compiler` is the result of the `compiler` template for the
language 'C' for `target`.
'''
assert host_or_target in (host, target)
assert language in ('C', 'C++')
assert language == 'C' or c_compiler is not None
assert host_or_target == target or other_compiler is not None
assert language == 'C' or host_or_target == target or \
other_c_compiler is not None
host_or_target_str = {
host: 'host',
target: 'target',
}[host_or_target]
var = {
('C', target): 'CC',
('C++', target): 'CXX',
('C', host): 'HOST_CC',
('C++', host): 'HOST_CXX',
}[language, host_or_target]
default_compilers = {
'C': lambda: default_c_compilers(host_or_target),
'C++': lambda: default_cxx_compilers(c_compiler),
}[language]()
what='the %s %s compiler' % (host_or_target_str, language)
option(env=var, nargs=1, help='Path to %s' % what)
# Handle the compiler given by the user through one of the CC/CXX/HOST_CC/
# HOST_CXX variables.
@depends_if(var)
@imports(_from='itertools', _import='takewhile')
@imports(_from='mozbuild.shellutil', _import='split', _as='shell_split')
def provided_compiler(cmd):
# Historically, the compiler variables have contained more than the
# path to the compiler itself. So for backwards compatibility, try to
# find what is what in there, assuming the first dash-prefixed item is
# a compiler option, the item before that is the compiler, and anything
# before that is a compiler wrapper.
cmd = shell_split(cmd[0])
without_flags = list(takewhile(lambda x: not x.startswith('-'), cmd))
return namespace(
wrapper=without_flags[:-1],
compiler=without_flags[-1],
flags=cmd[len(without_flags):],
)
# Derive the host compiler from the corresponding target compiler when no
# explicit compiler was given and we're not cross compiling. For the C++
# compiler, though, prefer to derive from the host C compiler when it
# doesn't match the target C compiler.
# As a special case, since clang supports all kinds of targets in the same
# executable, when cross compiling with clang, default to the same compiler
# as the target compiler, resetting flags.
if host_or_target == host:
if other_c_compiler is not None:
args = (c_compiler, other_c_compiler)
else:
args = ()
@depends(provided_compiler, other_compiler, cross_compiling, *args)
def provided_compiler(value, other_compiler, cross_compiling, *args):
if value:
return value
c_compiler, other_c_compiler = args if args else (None, None)
if not cross_compiling and c_compiler == other_c_compiler:
return other_compiler
if cross_compiling and other_compiler.type == 'clang':
return namespace(**{
k: [] if k == 'flags' else v
for k, v in other_compiler.__dict__.iteritems()
})
# Normally, we'd use `var` instead of `_var`, but the interaction with
# old-configure complicates things, and for now, we a) can't take the plain
# result from check_prog as CC/CXX/HOST_CC/HOST_CXX and b) have to let
# old-configure AC_SUBST it (because it's autoconf doing it, not us)
compiler = check_prog('_%s' % var, what=what, progs=default_compilers,
input=provided_compiler.compiler,
paths=toolchain_search_path)
@depends(compiler, provided_compiler, compiler_wrapper, host_or_target)
@checking('whether %s can be used' % what, lambda x: bool(x))
@imports(_from='mozbuild.shellutil', _import='quote')
def valid_compiler(compiler, provided_compiler, compiler_wrapper,
host_or_target):
wrapper = list(compiler_wrapper or ())
if provided_compiler:
provided_wrapper = list(provided_compiler.wrapper)
# When doing a subconfigure, the compiler is set by old-configure
# and it contains the wrappers from --with-compiler-wrapper and
# --with-ccache.
if provided_wrapper[:len(wrapper)] == wrapper:
provided_wrapper = provided_wrapper[len(wrapper):]
wrapper.extend(provided_wrapper)
flags = provided_compiler.flags
else:
flags = []
# Ideally, we'd always use the absolute path, but unfortunately, on
# Windows, the compiler is very often in a directory containing spaces.
# Unfortunately, due to the way autoconf does its compiler tests with
# eval, that doesn't work out. So in that case, check that the
# compiler can still be found in $PATH, and use the file name instead
# of the full path.
if quote(compiler) != compiler:
full_path = os.path.abspath(compiler)
compiler = os.path.basename(compiler)
found_compiler = find_program(compiler)
if not found_compiler:
die('%s is not in your $PATH'
% quote(os.path.dirname(full_path)))
if os.path.normcase(find_program(compiler)) != os.path.normcase(
full_path):
die('Found `%s` before `%s` in your $PATH. '
'Please reorder your $PATH.',
quote(os.path.dirname(found_compiler)),
quote(os.path.dirname(full_path)))
info = check_compiler(wrapper + [compiler] + flags, language,
host_or_target)
# Check that the additional flags we got are enough to not require any
# more flags.
if info.flags:
flags += info.flags
info = check_compiler(wrapper + [compiler] + flags, language,
host_or_target)
if not info.target_cpu or info.target_cpu != host_or_target.cpu:
raise FatalCheckError(
'%s %s compiler target CPU (%s) does not match --%s CPU (%s)'
% (host_or_target_str.capitalize(), language,
info.target_cpu or 'unknown', host_or_target_str,
host_or_target.raw_cpu))
if not info.target_kernel or (info.target_kernel !=
host_or_target.kernel):
raise FatalCheckError(
'%s %s compiler target kernel (%s) does not match --%s kernel (%s)'
% (host_or_target_str.capitalize(), language,
info.target_kernel or 'unknown', host_or_target_str,
host_or_target.kernel))
if not info.target_endianness or (info.target_endianness !=
host_or_target.endianness):
raise FatalCheckError(
'%s %s compiler target endianness (%s) does not match --%s '
'endianness (%s)'
% (host_or_target_str.capitalize(), language,
info.target_endianness or 'unknown', host_or_target_str,
host_or_target.endianness))
if info.flags:
raise FatalCheckError(
'Unknown compiler or compiler not supported.')
# Compiler version checks
# ===================================================
# Check the compiler version here instead of in `compiler_version` so
# that the `checking` message doesn't pretend the compiler can be used
# to then bail out one line later.
if info.type == 'gcc' and info.version < '4.9.0':
raise FatalCheckError(
'Only GCC 4.9 or newer is supported (found version %s).'
% info.version)
# If you want to bump the version check here search for
# __cpp_static_assert above, and see the associated comment.
if info.type == 'clang' and not info.version:
raise FatalCheckError(
'Only clang/llvm 3.6 or newer is supported.')
if info.type == 'msvc':
if info.version < '19.00.24213':
raise FatalCheckError(
'This version (%s) of the MSVC compiler is not '
'supported.\n'
'You must install Visual C++ 2015 Update 3 or newer in '
'order to build.\n'
'See https://developer.mozilla.org/en/'
'Windows_Build_Prerequisites' % info.version)
return namespace(
wrapper=wrapper,
compiler=compiler,
flags=flags,
type=info.type,
version=info.version,
language=language,
)
@depends(valid_compiler)
@checking('%s version' % what)
def compiler_version(compiler):
return compiler.version
if language == 'C++':
@depends(valid_compiler, c_compiler)
def valid_compiler(compiler, c_compiler):
if compiler.type != c_compiler.type:
die('The %s C compiler is %s, while the %s C++ compiler is '
'%s. Need to use the same compiler suite.',
host_or_target_str, c_compiler.type,
host_or_target_str, compiler.type)
if compiler.version != c_compiler.version:
die('The %s C compiler is version %s, while the %s C++ '
'compiler is version %s. Need to use the same compiler '
'version.',
host_or_target_str, c_compiler.version,
host_or_target_str, compiler.version)
return compiler
# Set CC/CXX/HOST_CC/HOST_CXX for old-configure, which needs the wrapper
# and the flags that were part of the user input for those variables to
# be provided.
add_old_configure_assignment(var, depends_if(valid_compiler)(
lambda x: list(x.wrapper) + [x.compiler] + list(x.flags)))
# Set CC_TYPE/CC_VERSION/HOST_CC_TYPE/HOST_CC_VERSION to allow
# old-configure to do some of its still existing checks.
if language == 'C':
set_config(
'%s_TYPE' % var, valid_compiler.type)
add_old_configure_assignment(
'%s_TYPE' % var, valid_compiler.type)
add_old_configure_assignment(
'%s_VERSION' % var, valid_compiler.version)
valid_compiler = compiler_class(valid_compiler, host_or_target)
def compiler_error():
raise FatalCheckError('Failed compiling a simple %s source with %s'
% (language, what))
valid_compiler.try_compile(check_msg='%s works' % what,
onerror=compiler_error)
# Set CPP/CXXCPP for both the build system and old-configure. We don't
# need to check this works for preprocessing, because we already relied
# on $CC -E/$CXX -E doing preprocessing work to validate the compiler
# in the first place.
if host_or_target == target:
pp_var = {
'C': 'CPP',
'C++': 'CXXCPP',
}[language]
preprocessor = depends_if(valid_compiler)(
lambda x: list(x.wrapper) + [x.compiler, '-E'] + list(x.flags))
set_config(pp_var, preprocessor)
add_old_configure_assignment(pp_var, preprocessor)
if language == 'C':
linker_var = {
target: 'LD',
host: 'HOST_LD',
}[host_or_target]
@deprecated_option(env=linker_var, nargs=1)
def linker(value):
if value:
return value[0]
@depends(valid_compiler, linker)
def unused_linker(compiler, linker):
if linker and compiler.type != 'msvc':
log.warning('The value of %s is not used by this build system.'
% linker_var)
if host_or_target == target:
@depends(valid_compiler)
def is_msvc(compiler):
return compiler.type == 'msvc'
imply_option('LINK', linker, reason='LD', when=is_msvc)
return valid_compiler
c_compiler = compiler('C', target)
cxx_compiler = compiler('C++', target, c_compiler=c_compiler)
host_c_compiler = compiler('C', host, other_compiler=c_compiler)
host_cxx_compiler = compiler('C++', host, c_compiler=host_c_compiler,
other_compiler=cxx_compiler,
other_c_compiler=c_compiler)
# Generic compiler-based conditions.
non_msvc_compiler = depends(c_compiler)(lambda info: info.type != 'msvc')
building_with_gcc = depends(c_compiler)(lambda info: info.type == 'gcc')
@depends(c_compiler)
def msvs_version(info):
# clang-cl emulates the same version scheme as cl. And MSVS_VERSION needs to
# be set for GYP on Windows.
if info.type in ('clang-cl', 'msvc'):
if info.version >= '19.10':
return '2017'
elif info.version >= '19.00':
return '2015'
return ''
set_config('MSVS_VERSION', msvs_version)
include('compile-checks.configure')
@depends(have_64_bit,
try_compile(body='static_assert(sizeof(void *) == 8, "")',
check_msg='for 64-bit OS'))
def check_have_64_bit(have_64_bit, compiler_have_64_bit):
if have_64_bit != compiler_have_64_bit:
configure_error('The target compiler does not agree with configure '
'about the target bitness.')
option(env='BINDGEN_CFLAGS',
nargs=1,
help='Options bindgen should pass to the C/C++ parser')
@depends('BINDGEN_CFLAGS')
@checking('bindgen cflags', lambda s: s if s and s.strip() else 'no')
def bindgen_cflags(value):
if value and len(value):
# Reformat the env value for substitution into a toml list.
flags = value[0].split()
return ', '.join('"' + flag + '"' for flag in flags)
return ''
set_config('BINDGEN_CFLAGS', bindgen_cflags)
@depends(c_compiler)
def default_debug_flags(compiler_info):
# Debug info is ON by default.
if compiler_info.type in ('msvc', 'clang-cl'):
return '-Zi'
return '-g'
option(env='MOZ_DEBUG_FLAGS',
nargs=1,
help='Debug compiler flags')
imply_option('--enable-debug-symbols',
depends_if('--enable-debug')(lambda v: v))
js_option('--enable-debug-symbols',
nargs='?',
default=True,
help='Enable debug symbols using the given compiler flags')
set_config('MOZ_DEBUG_SYMBOLS',
depends_if('--enable-debug-symbols')(lambda _: True))
@depends('MOZ_DEBUG_FLAGS', '--enable-debug-symbols', default_debug_flags)
def debug_flags(env_debug_flags, enable_debug_flags, default_debug_flags):
# If MOZ_DEBUG_FLAGS is set, and --enable-debug-symbols is set to a value,
# --enable-debug-symbols takes precedence. Note, the value of
# --enable-debug-symbols may be implied by --enable-debug.
if len(enable_debug_flags):
return enable_debug_flags[0]
if env_debug_flags:
return env_debug_flags[0]
return default_debug_flags
set_config('MOZ_DEBUG_FLAGS', debug_flags)
add_old_configure_assignment('MOZ_DEBUG_FLAGS', debug_flags)
@depends(c_compiler)
def color_cflags(info):
# We could test compiling with flags. By why incur the overhead when
# color support should always be present in a specific toolchain
# version?
# Code for auto-adding this flag to compiler invocations needs to
# determine if an existing flag isn't already present. That is likely
# using exact string matching on the returned value. So if the return
# value changes to e.g. "<x>=always", exact string match may fail and
# multiple color flags could be added. So examine downstream consumers
# before adding flags to return values.
if info.type == 'gcc' and info.version >= '4.9.0':
return '-fdiagnostics-color'
elif info.type == 'clang':
return '-fcolor-diagnostics'
else:
return ''
set_config('COLOR_CFLAGS', color_cflags)
# Some standard library headers (notably bionic on Android) declare standard
# functions (e.g. getchar()) and also #define macros for those standard
# functions. libc++ deals with this by doing something like the following
# (explanatory comments added):
#
# #ifdef FUNC
# // Capture the definition of FUNC.
# inline _LIBCPP_INLINE_VISIBILITY int __libcpp_FUNC(...) { return FUNC(...); }
# #undef FUNC
# // Use a real inline definition.
# inline _LIBCPP_INLINE_VISIBILITY int FUNC(...) { return _libcpp_FUNC(...); }
# #endif
#
# _LIBCPP_INLINE_VISIBILITY is typically defined as:
#
# __attribute__((__visibility__("hidden"), __always_inline__))
#
# Unfortunately, this interacts badly with our system header wrappers, as the:
#
# #pragma GCC visibility push(default)
#
# that they do prior to including the actual system header is treated by the
# compiler as an explicit declaration of visibility on every function declared
# in the header. Therefore, when the libc++ code above is encountered, it is
# as though the compiler has effectively seen:
#
# int FUNC(...) __attribute__((__visibility__("default")));
# int FUNC(...) __attribute__((__visibility__("hidden")));
#