-
Notifications
You must be signed in to change notification settings - Fork 7
/
meson.build
4576 lines (4177 loc) · 163 KB
/
meson.build
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
project('qemu', ['c'], meson_version: '>=1.1.0',
default_options: ['warning_level=1', 'c_std=gnu11', 'cpp_std=gnu++11', 'b_colorout=auto',
'b_staticpic=false', 'stdsplit=false', 'optimization=2', 'b_pie=true'],
version: files('VERSION'))
add_test_setup('quick', exclude_suites: ['slow', 'thorough'], is_default: true)
add_test_setup('slow', exclude_suites: ['thorough'], env: ['G_TEST_SLOW=1', 'SPEED=slow'])
add_test_setup('thorough', env: ['G_TEST_SLOW=1', 'SPEED=thorough'])
meson.add_postconf_script(find_program('scripts/symlink-install-tree.py'))
####################
# Global variables #
####################
not_found = dependency('', required: false)
keyval = import('keyval')
ss = import('sourceset')
fs = import('fs')
host_os = host_machine.system()
config_host = keyval.load(meson.current_build_dir() / 'config-host.mak')
# Temporary directory used for files created while
# configure runs. Since it is in the build directory
# we can safely blow away any previous version of it
# (and we need not jump through hoops to try to delete
# it when configure exits.)
tmpdir = meson.current_build_dir() / 'meson-private/temp'
if get_option('qemu_suffix').startswith('/')
error('qemu_suffix cannot start with a /')
endif
qemu_confdir = get_option('sysconfdir') / get_option('qemu_suffix')
qemu_datadir = get_option('datadir') / get_option('qemu_suffix')
qemu_docdir = get_option('docdir') / get_option('qemu_suffix')
qemu_moddir = get_option('libdir') / get_option('qemu_suffix')
qemu_desktopdir = get_option('datadir') / 'applications'
qemu_icondir = get_option('datadir') / 'icons'
genh = []
qapi_trace_events = []
bsd_oses = ['gnu/kfreebsd', 'freebsd', 'netbsd', 'openbsd', 'dragonfly', 'darwin']
supported_oses = ['windows', 'freebsd', 'netbsd', 'openbsd', 'darwin', 'sunos', 'linux']
supported_cpus = ['ppc', 'ppc64', 's390x', 'riscv32', 'riscv64', 'x86', 'x86_64',
'arm', 'aarch64', 'loongarch64', 'mips', 'mips64', 'sparc64']
cpu = host_machine.cpu_family()
target_dirs = config_host['TARGET_DIRS'].split()
############
# Programs #
############
sh = find_program('sh')
python = import('python').find_installation()
cc = meson.get_compiler('c')
all_languages = ['c']
if host_os == 'windows' and add_languages('cpp', required: false, native: false)
all_languages += ['cpp']
cxx = meson.get_compiler('cpp')
endif
if host_os == 'darwin' and \
add_languages('objc', required: true, native: false)
all_languages += ['objc']
objc = meson.get_compiler('objc')
endif
dtrace = not_found
stap = not_found
if 'dtrace' in get_option('trace_backends')
dtrace = find_program('dtrace', required: true)
stap = find_program('stap', required: false)
if stap.found()
# Workaround to avoid dtrace(1) producing a file with 'hidden' symbol
# visibility. Define STAP_SDT_V2 to produce 'default' symbol visibility
# instead. QEMU --enable-modules depends on this because the SystemTap
# semaphores are linked into the main binary and not the module's shared
# object.
add_global_arguments('-DSTAP_SDT_V2',
native: false, language: all_languages)
endif
endif
if get_option('iasl') == ''
iasl = find_program('iasl', required: false)
else
iasl = find_program(get_option('iasl'), required: true)
endif
edk2_targets = [ 'arm-softmmu', 'aarch64-softmmu', 'i386-softmmu', 'x86_64-softmmu', 'riscv64-softmmu' ]
unpack_edk2_blobs = false
foreach target : edk2_targets
if target in target_dirs
bzip2 = find_program('bzip2', required: get_option('install_blobs'))
unpack_edk2_blobs = bzip2.found()
break
endif
endforeach
#####################
# Option validation #
#####################
# Fuzzing
if get_option('fuzzing') and get_option('fuzzing_engine') == '' and \
not cc.links('''
#include <stdint.h>
#include <sys/types.h>
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { return 0; }
''',
args: ['-Werror', '-fsanitize=fuzzer'])
error('Your compiler does not support -fsanitize=fuzzer')
endif
# Tracing backends
if 'ftrace' in get_option('trace_backends') and host_os != 'linux'
error('ftrace is supported only on Linux')
endif
if 'syslog' in get_option('trace_backends') and not cc.compiles('''
#include <syslog.h>
int main(void) {
openlog("qemu", LOG_PID, LOG_DAEMON);
syslog(LOG_INFO, "configure");
return 0;
}''')
error('syslog is not supported on this system')
endif
# Miscellaneous Linux-only features
get_option('mpath') \
.require(host_os == 'linux', error_message: 'Multipath is supported only on Linux')
multiprocess_allowed = get_option('multiprocess') \
.require(host_os == 'linux', error_message: 'Multiprocess QEMU is supported only on Linux') \
.allowed()
vfio_user_server_allowed = get_option('vfio_user_server') \
.require(host_os == 'linux', error_message: 'vfio-user server is supported only on Linux') \
.allowed()
have_tpm = get_option('tpm') \
.require(host_os != 'windows', error_message: 'TPM emulation only available on POSIX systems') \
.allowed()
# vhost
have_vhost_user = get_option('vhost_user') \
.disable_auto_if(host_os != 'linux') \
.require(host_os != 'windows',
error_message: 'vhost-user is not available on Windows').allowed()
have_vhost_vdpa = get_option('vhost_vdpa') \
.require(host_os == 'linux',
error_message: 'vhost-vdpa is only available on Linux').allowed()
have_vhost_kernel = get_option('vhost_kernel') \
.require(host_os == 'linux',
error_message: 'vhost-kernel is only available on Linux').allowed()
have_vhost_user_crypto = get_option('vhost_crypto') \
.require(have_vhost_user,
error_message: 'vhost-crypto requires vhost-user to be enabled').allowed()
have_vhost = have_vhost_user or have_vhost_vdpa or have_vhost_kernel
have_vhost_net_user = have_vhost_user and get_option('vhost_net').allowed()
have_vhost_net_vdpa = have_vhost_vdpa and get_option('vhost_net').allowed()
have_vhost_net_kernel = have_vhost_kernel and get_option('vhost_net').allowed()
have_vhost_net = have_vhost_net_kernel or have_vhost_net_user or have_vhost_net_vdpa
# type of binaries to build
have_linux_user = false
have_bsd_user = false
have_system = false
foreach target : target_dirs
have_linux_user = have_linux_user or target.endswith('linux-user')
have_bsd_user = have_bsd_user or target.endswith('bsd-user')
have_system = have_system or target.endswith('-softmmu')
endforeach
have_user = have_linux_user or have_bsd_user
have_tools = get_option('tools') \
.disable_auto_if(not have_system) \
.allowed()
have_ga = get_option('guest_agent') \
.disable_auto_if(not have_system and not have_tools) \
.require(host_os in ['sunos', 'linux', 'windows', 'freebsd', 'netbsd', 'openbsd'],
error_message: 'unsupported OS for QEMU guest agent') \
.allowed()
have_block = have_system or have_tools
enable_modules = get_option('modules') \
.require(host_os != 'windows',
error_message: 'Modules are not available for Windows') \
.require(not get_option('prefer_static'),
error_message: 'Modules are incompatible with static linking') \
.allowed()
#######################################
# Variables for host and accelerators #
#######################################
if cpu not in supported_cpus
host_arch = 'unknown'
elif cpu == 'x86'
host_arch = 'i386'
elif cpu == 'mips64'
host_arch = 'mips'
elif cpu in ['riscv32', 'riscv64']
host_arch = 'riscv'
else
host_arch = cpu
endif
if cpu in ['x86', 'x86_64']
kvm_targets = ['i386-softmmu', 'x86_64-softmmu']
elif cpu == 'aarch64'
kvm_targets = ['aarch64-softmmu']
elif cpu == 's390x'
kvm_targets = ['s390x-softmmu']
elif cpu in ['ppc', 'ppc64']
kvm_targets = ['ppc-softmmu', 'ppc64-softmmu']
elif cpu in ['mips', 'mips64']
kvm_targets = ['mips-softmmu', 'mipsel-softmmu', 'mips64-softmmu', 'mips64el-softmmu']
elif cpu in ['riscv32']
kvm_targets = ['riscv32-softmmu']
elif cpu in ['riscv64']
kvm_targets = ['riscv64-softmmu']
elif cpu in ['loongarch64']
kvm_targets = ['loongarch64-softmmu']
else
kvm_targets = []
endif
accelerator_targets = { 'CONFIG_KVM': kvm_targets }
if cpu in ['x86', 'x86_64']
xen_targets = ['i386-softmmu', 'x86_64-softmmu']
elif cpu in ['arm', 'aarch64']
# i386 emulator provides xenpv machine type for multiple architectures
xen_targets = ['i386-softmmu', 'x86_64-softmmu', 'aarch64-softmmu']
else
xen_targets = []
endif
accelerator_targets += { 'CONFIG_XEN': xen_targets }
if cpu in ['aarch64']
accelerator_targets += {
'CONFIG_HVF': ['aarch64-softmmu']
}
endif
if cpu in ['x86', 'x86_64']
accelerator_targets += {
'CONFIG_HVF': ['x86_64-softmmu'],
'CONFIG_NVMM': ['i386-softmmu', 'x86_64-softmmu'],
'CONFIG_WHPX': ['i386-softmmu', 'x86_64-softmmu'],
}
endif
modular_tcg = []
# Darwin does not support references to thread-local variables in modules
if host_os != 'darwin'
modular_tcg = ['i386-softmmu', 'x86_64-softmmu']
endif
##################
# Compiler flags #
##################
foreach lang : all_languages
compiler = meson.get_compiler(lang)
if compiler.get_id() == 'gcc' and compiler.version().version_compare('>=7.4')
# ok
elif compiler.get_id() == 'clang' and compiler.compiles('''
#ifdef __apple_build_version__
# if __clang_major__ < 12 || (__clang_major__ == 12 && __clang_minor__ < 0)
# error You need at least XCode Clang v12.0 to compile QEMU
# endif
#else
# if __clang_major__ < 10 || (__clang_major__ == 10 && __clang_minor__ < 0)
# error You need at least Clang v10.0 to compile QEMU
# endif
#endif''')
# ok
else
error('You either need GCC v7.4 or Clang v10.0 (or XCode Clang v12.0) to compile QEMU')
endif
endforeach
# default flags for all hosts
# We use -fwrapv to tell the compiler that we require a C dialect where
# left shift of signed integers is well defined and has the expected
# 2s-complement style results. (Both clang and gcc agree that it
# provides these semantics.)
qemu_common_flags = [
'-D_GNU_SOURCE', '-D_FILE_OFFSET_BITS=64', '-D_LARGEFILE_SOURCE',
'-fno-strict-aliasing', '-fno-common', '-fwrapv' ]
qemu_cflags = []
qemu_ldflags = []
if host_os == 'darwin'
# Disable attempts to use ObjectiveC features in os/object.h since they
# won't work when we're compiling with gcc as a C compiler.
if compiler.get_id() == 'gcc'
qemu_common_flags += '-DOS_OBJECT_USE_OBJC=0'
endif
elif host_os == 'sunos'
# needed for CMSG_ macros in sys/socket.h
qemu_common_flags += '-D_XOPEN_SOURCE=600'
# needed for TIOCWIN* defines in termios.h
qemu_common_flags += '-D__EXTENSIONS__'
elif host_os == 'haiku'
qemu_common_flags += ['-DB_USE_POSITIVE_POSIX_ERRORS', '-D_BSD_SOURCE', '-fPIC']
endif
# __sync_fetch_and_and requires at least -march=i486. Many toolchains
# use i686 as default anyway, but for those that don't, an explicit
# specification is necessary
if host_arch == 'i386' and not cc.links('''
static int sfaa(int *ptr)
{
return __sync_fetch_and_and(ptr, 0);
}
int main(void)
{
int val = 42;
val = __sync_val_compare_and_swap(&val, 0, 1);
sfaa(&val);
return val;
}''')
qemu_common_flags = ['-march=i486'] + qemu_common_flags
endif
# Pick x86-64 baseline version
if host_arch in ['i386', 'x86_64']
if get_option('x86_version') == '0' and host_arch == 'x86_64'
error('x86_64-v1 required for x86-64 hosts')
endif
# add flags for individual instruction set extensions
if get_option('x86_version') >= '1'
if host_arch == 'i386'
qemu_common_flags = ['-mfpmath=sse'] + qemu_common_flags
else
# present on basically all processors but technically not part of
# x86-64-v1, so only include -mneeded for x86-64 version 2 and above
qemu_common_flags = ['-mcx16'] + qemu_common_flags
endif
endif
if get_option('x86_version') >= '2'
qemu_common_flags = ['-mpopcnt'] + qemu_common_flags
qemu_common_flags = cc.get_supported_arguments('-mneeded') + qemu_common_flags
endif
if get_option('x86_version') >= '3'
qemu_common_flags = ['-mmovbe', '-mabm', '-mbmi1', '-mbmi2', '-mfma', '-mf16c'] + qemu_common_flags
endif
# add required vector instruction set (each level implies those below)
if get_option('x86_version') == '1'
qemu_common_flags = ['-msse2'] + qemu_common_flags
elif get_option('x86_version') == '2'
qemu_common_flags = ['-msse4.2'] + qemu_common_flags
elif get_option('x86_version') == '3'
qemu_common_flags = ['-mavx2'] + qemu_common_flags
elif get_option('x86_version') == '4'
qemu_common_flags = ['-mavx512f', '-mavx512bw', '-mavx512cd', '-mavx512dq', '-mavx512vl'] + qemu_common_flags
endif
endif
if get_option('prefer_static')
qemu_ldflags += get_option('b_pie') ? '-static-pie' : '-static'
endif
# Meson currently only handles pie as a boolean for now, so if the user
# has explicitly disabled PIE we need to extend our cflags.
#
# -no-pie is supposedly a linker flag that has no effect on the compiler
# command line, but some distros, that didn't quite know what they were
# doing, made local changes to gcc's specs file that turned it into
# a compiler command-line flag.
#
# What about linker flags? For a static build, no PIE is implied by -static
# which we added above (and if it's not because of the same specs patching,
# there's nothing we can do: compilation will fail, report a bug to your
# distro and do not use --disable-pie in the meanwhile). For dynamic linking,
# instead, we can't add -no-pie because it overrides -shared: the linker then
# tries to build an executable instead of a shared library and fails. So
# don't add -no-pie anywhere and cross fingers. :(
if not get_option('b_pie')
qemu_common_flags += cc.get_supported_arguments('-fno-pie', '-no-pie')
endif
if not get_option('stack_protector').disabled()
stack_protector_probe = '''
int main(int argc, char *argv[])
{
char arr[64], *p = arr, *c = argv[argc - 1];
while (*c) {
*p++ = *c++;
}
return 0;
}'''
have_stack_protector = false
foreach arg : ['-fstack-protector-strong', '-fstack-protector-all']
# We need to check both a compile and a link, since some compiler
# setups fail only on a .c->.o compile and some only at link time
if cc.compiles(stack_protector_probe, args: ['-Werror', arg]) and \
cc.links(stack_protector_probe, args: ['-Werror', arg])
have_stack_protector = true
qemu_cflags += arg
qemu_ldflags += arg
break
endif
endforeach
get_option('stack_protector') \
.require(have_stack_protector, error_message: 'Stack protector not supported')
endif
coroutine_backend = get_option('coroutine_backend')
ucontext_probe = '''
#include <ucontext.h>
#ifdef __stub_makecontext
#error Ignoring glibc stub makecontext which will always fail
#endif
int main(void) { makecontext(0, 0, 0); return 0; }'''
# On Windows the only valid backend is the Windows specific one.
# For POSIX prefer ucontext, but it's not always possible. The fallback
# is sigcontext.
supported_backends = []
if host_os == 'windows'
supported_backends += ['windows']
else
if host_os != 'darwin' and cc.links(ucontext_probe)
supported_backends += ['ucontext']
endif
supported_backends += ['sigaltstack']
endif
if coroutine_backend == 'auto'
coroutine_backend = supported_backends[0]
elif coroutine_backend not in supported_backends
error('"@0@" backend requested but not available. Available backends: @1@' \
.format(coroutine_backend, ', '.join(supported_backends)))
endif
# Compiles if SafeStack *not* enabled
safe_stack_probe = '''
int main(void)
{
#if defined(__has_feature)
#if __has_feature(safe_stack)
#error SafeStack Enabled
#endif
#endif
return 0;
}'''
if get_option('safe_stack') != not cc.compiles(safe_stack_probe)
safe_stack_arg = get_option('safe_stack') ? '-fsanitize=safe-stack' : '-fno-sanitize=safe-stack'
if get_option('safe_stack') != not cc.compiles(safe_stack_probe, args: safe_stack_arg)
error(get_option('safe_stack') \
? 'SafeStack not supported by your compiler' \
: 'Cannot disable SafeStack')
endif
qemu_cflags += safe_stack_arg
qemu_ldflags += safe_stack_arg
endif
if get_option('safe_stack') and coroutine_backend != 'ucontext'
error('SafeStack is only supported with the ucontext coroutine backend')
endif
if get_option('sanitizers')
if cc.has_argument('-fsanitize=address')
qemu_cflags = ['-fsanitize=address'] + qemu_cflags
qemu_ldflags = ['-fsanitize=address'] + qemu_ldflags
endif
# Detect static linking issue with ubsan - https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84285
if cc.links('int main(int argc, char **argv) { return argc + 1; }',
args: [qemu_ldflags, '-fsanitize=undefined'])
qemu_cflags = ['-fsanitize=undefined'] + qemu_cflags
qemu_ldflags = ['-fsanitize=undefined'] + qemu_ldflags
endif
endif
# Thread sanitizer is, for now, much noisier than the other sanitizers;
# keep it separate until that is not the case.
if get_option('tsan')
if get_option('sanitizers')
error('TSAN is not supported with other sanitizers')
endif
if not cc.has_function('__tsan_create_fiber',
args: '-fsanitize=thread',
prefix: '#include <sanitizer/tsan_interface.h>')
error('Cannot enable TSAN due to missing fiber annotation interface')
endif
qemu_cflags = ['-fsanitize=thread'] + qemu_cflags
qemu_ldflags = ['-fsanitize=thread'] + qemu_ldflags
endif
# Detect support for PT_GNU_RELRO + DT_BIND_NOW.
# The combination is known as "full relro", because .got.plt is read-only too.
qemu_ldflags += cc.get_supported_link_arguments('-Wl,-z,relro', '-Wl,-z,now')
if host_os == 'windows'
qemu_ldflags += cc.get_supported_link_arguments('-Wl,--no-seh', '-Wl,--nxcompat')
qemu_ldflags += cc.get_supported_link_arguments('-Wl,--dynamicbase', '-Wl,--high-entropy-va')
endif
if get_option('fuzzing')
# Specify a filter to only instrument code that is directly related to
# virtual-devices.
configure_file(output: 'instrumentation-filter',
input: 'scripts/oss-fuzz/instrumentation-filter-template',
copy: true)
if cc.compiles('int main () { return 0; }',
name: '-fsanitize-coverage-allowlist=/dev/null',
args: ['-fsanitize-coverage-allowlist=/dev/null',
'-fsanitize-coverage=trace-pc'] )
qemu_common_flags += ['-fsanitize-coverage-allowlist=instrumentation-filter']
endif
if get_option('fuzzing_engine') == ''
# Add CFLAGS to tell clang to add fuzzer-related instrumentation to all the
# compiled code. To build non-fuzzer binaries with --enable-fuzzing, link
# everything with fsanitize=fuzzer-no-link. Otherwise, the linker will be
# unable to bind the fuzzer-related callbacks added by instrumentation.
qemu_common_flags += ['-fsanitize=fuzzer-no-link']
qemu_ldflags += ['-fsanitize=fuzzer-no-link']
# For the actual fuzzer binaries, we need to link against the libfuzzer
# library. They need to be configurable, to support OSS-Fuzz
fuzz_exe_ldflags = ['-fsanitize=fuzzer']
else
# LIB_FUZZING_ENGINE was set; assume we are running on OSS-Fuzz, and
# the needed CFLAGS have already been provided
fuzz_exe_ldflags = get_option('fuzzing_engine').split()
endif
endif
if get_option('cfi')
cfi_flags=[]
# Check for dependency on LTO
if not get_option('b_lto')
error('Selected Control-Flow Integrity but LTO is disabled')
endif
if enable_modules
error('Selected Control-Flow Integrity is not compatible with modules')
endif
# Check for cfi flags. CFI requires LTO so we can't use
# get_supported_arguments, but need a more complex "compiles" which allows
# custom arguments
if cc.compiles('int main () { return 0; }', name: '-fsanitize=cfi-icall',
args: ['-flto', '-fsanitize=cfi-icall'] )
cfi_flags += '-fsanitize=cfi-icall'
else
error('-fsanitize=cfi-icall is not supported by the compiler')
endif
if cc.compiles('int main () { return 0; }',
name: '-fsanitize-cfi-icall-generalize-pointers',
args: ['-flto', '-fsanitize=cfi-icall',
'-fsanitize-cfi-icall-generalize-pointers'] )
cfi_flags += '-fsanitize-cfi-icall-generalize-pointers'
else
error('-fsanitize-cfi-icall-generalize-pointers is not supported by the compiler')
endif
if get_option('cfi_debug')
if cc.compiles('int main () { return 0; }',
name: '-fno-sanitize-trap=cfi-icall',
args: ['-flto', '-fsanitize=cfi-icall',
'-fno-sanitize-trap=cfi-icall'] )
cfi_flags += '-fno-sanitize-trap=cfi-icall'
else
error('-fno-sanitize-trap=cfi-icall is not supported by the compiler')
endif
endif
add_global_arguments(cfi_flags, native: false, language: all_languages)
add_global_link_arguments(cfi_flags, native: false, language: all_languages)
endif
# Check further flags that make QEMU more robust against malicious parties
hardening_flags = [
# Initialize all stack variables to zero. This makes
# it harder to take advantage of uninitialized stack
# data to drive exploits
'-ftrivial-auto-var-init=zero',
]
# Zero out registers used during a function call
# upon its return. This makes it harder to assemble
# ROP gadgets into something usable
#
# NB: Clang 17 is broken and SEGVs
# https://github.com/llvm/llvm-project/issues/75168
#
# NB2: This clashes with the "retguard" extension of OpenBSD's Clang
# https://gitlab.com/qemu-project/qemu/-/issues/2278
if host_os != 'openbsd' and \
cc.compiles('extern struct { void (*cb)(void); } s; void f(void) { s.cb(); }',
name: '-fzero-call-used-regs=used-gpr',
args: ['-O2', '-fzero-call-used-regs=used-gpr'])
hardening_flags += '-fzero-call-used-regs=used-gpr'
endif
qemu_common_flags += cc.get_supported_arguments(hardening_flags)
add_global_arguments(qemu_common_flags, native: false, language: all_languages)
add_global_link_arguments(qemu_ldflags, native: false, language: all_languages)
# Collect warning flags we want to set, sorted alphabetically
warn_flags = [
# First enable interesting warnings
'-Wempty-body',
'-Wendif-labels',
'-Wexpansion-to-defined',
'-Wformat-security',
'-Wformat-y2k',
'-Wignored-qualifiers',
'-Wimplicit-fallthrough=2',
'-Winit-self',
'-Wmissing-format-attribute',
'-Wmissing-prototypes',
'-Wnested-externs',
'-Wold-style-declaration',
'-Wold-style-definition',
'-Wredundant-decls',
'-Wshadow=local',
'-Wstrict-prototypes',
'-Wtype-limits',
'-Wundef',
'-Wvla',
'-Wwrite-strings',
# Then disable some undesirable warnings
'-Wno-gnu-variable-sized-type-not-at-end',
'-Wno-initializer-overrides',
'-Wno-missing-include-dirs',
'-Wno-psabi',
'-Wno-shift-negative-value',
'-Wno-string-plus-int',
'-Wno-tautological-type-limit-compare',
'-Wno-typedef-redefinition',
]
if host_os != 'darwin'
warn_flags += ['-Wthread-safety']
endif
# Set up C++ compiler flags
qemu_cxxflags = []
if 'cpp' in all_languages
qemu_cxxflags = ['-D__STDC_LIMIT_MACROS', '-D__STDC_CONSTANT_MACROS', '-D__STDC_FORMAT_MACROS'] + qemu_cflags
endif
add_project_arguments(qemu_cflags, native: false, language: 'c')
add_project_arguments(cc.get_supported_arguments(warn_flags), native: false, language: 'c')
if 'cpp' in all_languages
add_project_arguments(qemu_cxxflags, native: false, language: 'cpp')
add_project_arguments(cxx.get_supported_arguments(warn_flags), native: false, language: 'cpp')
endif
if 'objc' in all_languages
# Note sanitizer flags are not applied to Objective-C sources!
add_project_arguments(objc.get_supported_arguments(warn_flags), native: false, language: 'objc')
endif
if host_os == 'linux'
add_project_arguments('-isystem', meson.current_source_dir() / 'linux-headers',
'-isystem', 'linux-headers',
language: all_languages)
endif
add_project_arguments('-iquote', '.',
'-iquote', meson.current_source_dir(),
'-iquote', meson.current_source_dir() / 'include',
language: all_languages)
# If a host-specific include directory exists, list that first...
host_include = meson.current_source_dir() / 'host/include/'
if fs.is_dir(host_include / host_arch)
add_project_arguments('-iquote', host_include / host_arch,
language: all_languages)
endif
# ... followed by the generic fallback.
add_project_arguments('-iquote', host_include / 'generic',
language: all_languages)
sparse = find_program('cgcc', required: get_option('sparse'))
if sparse.found()
run_target('sparse',
command: [find_program('scripts/check_sparse.py'),
'compile_commands.json', sparse.full_path(), '-Wbitwise',
'-Wno-transparent-union', '-Wno-old-initializer',
'-Wno-non-pointer-null'])
endif
#####################################
# Host-specific libraries and flags #
#####################################
libm = cc.find_library('m', required: false)
threads = dependency('threads')
util = cc.find_library('util', required: false)
winmm = []
socket = []
version_res = []
coref = []
iokit = []
emulator_link_args = []
midl = not_found
widl = not_found
pathcch = not_found
host_dsosuf = '.so'
if host_os == 'windows'
midl = find_program('midl', required: false)
widl = find_program('widl', required: false)
pathcch = cc.find_library('pathcch')
socket = cc.find_library('ws2_32')
winmm = cc.find_library('winmm')
win = import('windows')
version_res = win.compile_resources('version.rc',
depend_files: files('pc-bios/qemu-nsis.ico'),
include_directories: include_directories('.'))
host_dsosuf = '.dll'
elif host_os == 'darwin'
coref = dependency('appleframeworks', modules: 'CoreFoundation')
iokit = dependency('appleframeworks', modules: 'IOKit', required: false)
host_dsosuf = '.dylib'
elif host_os == 'sunos'
socket = [cc.find_library('socket'),
cc.find_library('nsl'),
cc.find_library('resolv')]
elif host_os == 'haiku'
socket = [cc.find_library('posix_error_mapper'),
cc.find_library('network'),
cc.find_library('bsd')]
elif host_os == 'openbsd'
if get_option('tcg').allowed() and target_dirs.length() > 0
# Disable OpenBSD W^X if available
emulator_link_args = cc.get_supported_link_arguments('-Wl,-z,wxneeded')
endif
endif
###############################################
# Host-specific configuration of accelerators #
###############################################
accelerators = []
if get_option('kvm').allowed() and host_os == 'linux'
accelerators += 'CONFIG_KVM'
endif
if get_option('whpx').allowed() and host_os == 'windows'
if get_option('whpx').enabled() and host_machine.cpu() != 'x86_64'
error('WHPX requires 64-bit host')
elif cc.has_header('winhvplatform.h', required: get_option('whpx')) and \
cc.has_header('winhvemulation.h', required: get_option('whpx'))
accelerators += 'CONFIG_WHPX'
endif
endif
hvf = not_found
if get_option('hvf').allowed()
hvf = dependency('appleframeworks', modules: 'Hypervisor',
required: get_option('hvf'))
if hvf.found()
accelerators += 'CONFIG_HVF'
endif
endif
nvmm = not_found
if host_os == 'netbsd'
nvmm = cc.find_library('nvmm', required: get_option('nvmm'))
if nvmm.found()
accelerators += 'CONFIG_NVMM'
endif
endif
tcg_arch = host_arch
if get_option('tcg').allowed()
if host_arch == 'unknown'
if not get_option('tcg_interpreter')
error('Unsupported CPU @0@, try --enable-tcg-interpreter'.format(cpu))
endif
elif get_option('tcg_interpreter')
warning('Use of the TCG interpreter is not recommended on this host')
warning('architecture. There is a native TCG execution backend available')
warning('which provides substantially better performance and reliability.')
warning('It is strongly recommended to remove the --enable-tcg-interpreter')
warning('configuration option on this architecture to use the native')
warning('backend.')
endif
if get_option('tcg_interpreter')
tcg_arch = 'tci'
elif host_arch == 'x86_64'
tcg_arch = 'i386'
elif host_arch == 'ppc64'
tcg_arch = 'ppc'
endif
add_project_arguments('-iquote', meson.current_source_dir() / 'tcg' / tcg_arch,
language: all_languages)
accelerators += 'CONFIG_TCG'
endif
if 'CONFIG_KVM' not in accelerators and get_option('kvm').enabled()
error('KVM not available on this platform')
endif
if 'CONFIG_HVF' not in accelerators and get_option('hvf').enabled()
error('HVF not available on this platform')
endif
if 'CONFIG_NVMM' not in accelerators and get_option('nvmm').enabled()
error('NVMM not available on this platform')
endif
if 'CONFIG_WHPX' not in accelerators and get_option('whpx').enabled()
error('WHPX not available on this platform')
endif
xen = not_found
if get_option('xen').enabled() or (get_option('xen').auto() and have_system)
xencontrol = dependency('xencontrol', required: false,
method: 'pkg-config')
if xencontrol.found()
xen_pc = declare_dependency(version: xencontrol.version(),
dependencies: [
xencontrol,
# disabler: true makes xen_pc.found() return false if any is not found
dependency('xenstore', required: false,
method: 'pkg-config',
disabler: true),
dependency('xenforeignmemory', required: false,
method: 'pkg-config',
disabler: true),
dependency('xengnttab', required: false,
method: 'pkg-config',
disabler: true),
dependency('xenevtchn', required: false,
method: 'pkg-config',
disabler: true),
dependency('xendevicemodel', required: false,
method: 'pkg-config',
disabler: true),
# optional, no "disabler: true"
dependency('xentoolcore', required: false,
method: 'pkg-config')])
if xen_pc.found()
xen = xen_pc
endif
endif
if not xen.found()
xen_tests = [ '4.11.0', '4.10.0', '4.9.0', '4.8.0', '4.7.1' ]
xen_libs = {
'4.11.0': [ 'xenstore', 'xenctrl', 'xendevicemodel', 'xenforeignmemory', 'xengnttab', 'xenevtchn', 'xentoolcore' ],
'4.10.0': [ 'xenstore', 'xenctrl', 'xendevicemodel', 'xenforeignmemory', 'xengnttab', 'xenevtchn', 'xentoolcore' ],
'4.9.0': [ 'xenstore', 'xenctrl', 'xendevicemodel', 'xenforeignmemory', 'xengnttab', 'xenevtchn' ],
'4.8.0': [ 'xenstore', 'xenctrl', 'xenforeignmemory', 'xengnttab', 'xenevtchn' ],
'4.7.1': [ 'xenstore', 'xenctrl', 'xenforeignmemory', 'xengnttab', 'xenevtchn' ],
}
xen_deps = {}
foreach ver: xen_tests
# cache the various library tests to avoid polluting the logs
xen_test_deps = []
foreach l: xen_libs[ver]
if l not in xen_deps
xen_deps += { l: cc.find_library(l, required: false) }
endif
xen_test_deps += xen_deps[l]
endforeach
# Use -D to pick just one of the test programs in scripts/xen-detect.c
xen_version = ver.split('.')
xen_ctrl_version = xen_version[0] + \
('0' + xen_version[1]).substring(-2) + \
('0' + xen_version[2]).substring(-2)
if cc.links(files('scripts/xen-detect.c'),
args: '-DCONFIG_XEN_CTRL_INTERFACE_VERSION=' + xen_ctrl_version,
dependencies: xen_test_deps)
xen = declare_dependency(version: ver, dependencies: xen_test_deps)
break
endif
endforeach
endif
if xen.found()
accelerators += 'CONFIG_XEN'
elif get_option('xen').enabled()
error('could not compile and link Xen test program')
endif
endif
have_xen_pci_passthrough = get_option('xen_pci_passthrough') \
.require(xen.found(),
error_message: 'Xen PCI passthrough requested but Xen not enabled') \
.require(host_os == 'linux',
error_message: 'Xen PCI passthrough not available on this platform') \
.require(cpu == 'x86' or cpu == 'x86_64',
error_message: 'Xen PCI passthrough not available on this platform') \
.allowed()
################
# Dependencies #
################
# When bumping glib minimum version, please check also whether to increase
# the _WIN32_WINNT setting in osdep.h according to the value from glib
glib_req_ver = '>=2.66.0'
glib_pc = dependency('glib-2.0', version: glib_req_ver, required: true,
method: 'pkg-config')
glib_cflags = []
if enable_modules
gmodule = dependency('gmodule-export-2.0', version: glib_req_ver, required: true,
method: 'pkg-config')
elif get_option('plugins')
gmodule = dependency('gmodule-no-export-2.0', version: glib_req_ver, required: true,
method: 'pkg-config')
else
gmodule = not_found
endif
# This workaround is required due to a bug in pkg-config file for glib as it
# doesn't define GLIB_STATIC_COMPILATION for pkg-config --static
if host_os == 'windows' and get_option('prefer_static')
glib_cflags += ['-DGLIB_STATIC_COMPILATION']
endif
# Sanity check that the current size_t matches the
# size that glib thinks it should be. This catches
# problems on multi-arch where people try to build
# 32-bit QEMU while pointing at 64-bit glib headers
if not cc.compiles('''
#include <glib.h>
#include <unistd.h>
#define QEMU_BUILD_BUG_ON(x) \
typedef char qemu_build_bug_on[(x)?-1:1] __attribute__((unused));
int main(void) {
QEMU_BUILD_BUG_ON(sizeof(size_t) != GLIB_SIZEOF_SIZE_T);
return 0;
}''', dependencies: glib_pc, args: glib_cflags)
error('''sizeof(size_t) doesn't match GLIB_SIZEOF_SIZE_T.
You probably need to set PKG_CONFIG_LIBDIR" to point
to the right pkg-config files for your build target.''')
endif
glib = declare_dependency(dependencies: [glib_pc, gmodule],
compile_args: glib_cflags,
version: glib_pc.version())
# Check whether glib has gslice, which we have to avoid for correctness.
# TODO: remove this check and the corresponding workaround (qtree) when
# the minimum supported glib is >= 2.75.3
glib_has_gslice = glib.version().version_compare('<2.75.3')
# override glib dep to include the above refinements
meson.override_dependency('glib-2.0', glib)
# The path to glib.h is added to all compilation commands.
add_project_dependencies(glib.partial_dependency(compile_args: true, includes: true),
native: false, language: all_languages)
gio = not_found
gdbus_codegen = not_found
gdbus_codegen_error = '@0@ requires gdbus-codegen, please install libgio'
if not get_option('gio').auto() or have_system
gio = dependency('gio-2.0', required: get_option('gio'),
method: 'pkg-config')
if gio.found() and not cc.links('''
#include <gio/gio.h>
int main(void)
{
g_dbus_proxy_new_sync(0, 0, 0, 0, 0, 0, 0, 0);
return 0;
}''', dependencies: [glib, gio])
if get_option('gio').enabled()
error('The installed libgio is broken for static linking')
endif
gio = not_found
endif
if gio.found()
gdbus_codegen = find_program(gio.get_variable('gdbus_codegen'),
required: get_option('gio'))
gio_unix = dependency('gio-unix-2.0', required: get_option('gio'),
method: 'pkg-config')
gio = declare_dependency(dependencies: [gio, gio_unix],
version: gio.version())
endif
endif
if gdbus_codegen.found() and get_option('cfi')
gdbus_codegen = not_found
gdbus_codegen_error = '@0@ uses gdbus-codegen, which does not support control flow integrity'
endif
xml_pp = find_program('scripts/xml-preprocess.py')
lttng = not_found
if 'ust' in get_option('trace_backends')