Repository navigation
Expand file tree
/
Copy pathacinclude.m4
More file actions
1118 lines (998 loc) · 39 KB
/
Copy pathacinclude.m4
File metadata and controls
1118 lines (998 loc) · 39 KB
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
dnl Copyright (C) The libssh2 project and its contributors.
dnl SPDX-License-Identifier: BSD-3-Clause
dnl CURL_CPP_P
dnl
dnl Check if $cpp -P should be used for extract define values due to gcc 5
dnl splitting up strings and defines between line outputs. gcc by default
dnl (without -P) shows TEST EINVAL TEST as
dnl
dnl # 13 "conftest.c"
dnl TEST
dnl # 13 "conftest.c" 3 4
dnl 22
dnl # 13 "conftest.c"
dnl TEST
AC_DEFUN([CURL_CPP_P], [
AC_MSG_CHECKING([if cpp -P is needed])
AC_EGREP_CPP([TEST.*TEST], [
#include <errno.h>
TEST EINVAL TEST
], [cpp=no], [cpp=yes])
AC_MSG_RESULT([$cpp])
dnl we need cpp -P so check if it works then
if test "x$cpp" = "xyes"; then
AC_MSG_CHECKING([if cpp -P works])
OLDCPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS -P"
AC_EGREP_CPP([TEST.*TEST], [
#include <errno.h>
TEST EINVAL TEST
], [cpp_p=yes], [cpp_p=no])
AC_MSG_RESULT([$cpp_p])
if test "x$cpp_p" = "xno"; then
AC_MSG_WARN([failed to figure out cpp -P alternative])
# without -P
CPPPFLAG=""
else
# with -P
CPPPFLAG="-P"
fi
dnl restore CPPFLAGS
CPPFLAGS=$OLDCPPFLAGS
else
# without -P
CPPPFLAG=""
fi
])
dnl CURL_CHECK_DEF (SYMBOL, [INCLUDES], [SILENT])
dnl -------------------------------------------------
dnl Use the C preprocessor to find out if the given object-style symbol
dnl is defined and get its expansion. This macro does not use default
dnl includes even if no INCLUDES argument is given. This macro runs
dnl silently when invoked with three arguments. If the expansion would
dnl result in a set of double-quoted strings the returned expansion is
dnl actually a single double-quoted string concatenating all them.
AC_DEFUN([CURL_CHECK_DEF], [
AC_REQUIRE([CURL_CPP_P])
OLDCPPFLAGS=$CPPFLAGS
# CPPPFLAG comes from CURL_CPP_P
CPPFLAGS="$CPPFLAGS $CPPPFLAG"
AS_VAR_PUSHDEF([ac_HaveDef], [curl_cv_have_def_$1])
AS_VAR_PUSHDEF([ac_Def], [curl_cv_def_$1])
if test -z "$SED"; then
AC_MSG_ERROR([SED not set. Cannot continue without SED being set.])
fi
if test -z "$GREP"; then
AC_MSG_ERROR([GREP not set. Cannot continue without GREP being set.])
fi
ifelse($3,,[AC_MSG_CHECKING([for preprocessor definition of $1])])
tmp_exp=""
AC_PREPROC_IFELSE([
AC_LANG_SOURCE(
ifelse($2,,,[$2])[[
#ifdef $1
CURL_DEF_TOKEN $1
#endif
]])
],[
tmp_exp=`eval "$ac_cpp conftest.$ac_ext" 2>/dev/null | \
"$GREP" CURL_DEF_TOKEN 2>/dev/null | \
"$SED" 's/.*CURL_DEF_TOKEN[[ ]][[ ]]*//' 2>/dev/null | \
"$SED" 's/[["]][[ ]]*[["]]//g' 2>/dev/null`
if test -z "$tmp_exp" || test "$tmp_exp" = "$1"; then
tmp_exp=""
fi
])
if test -z "$tmp_exp"; then
AS_VAR_SET(ac_HaveDef, no)
ifelse($3,,[AC_MSG_RESULT([no])])
else
AS_VAR_SET(ac_HaveDef, yes)
AS_VAR_SET(ac_Def, $tmp_exp)
ifelse($3,,[AC_MSG_RESULT([$tmp_exp])])
fi
AS_VAR_POPDEF([ac_Def])
AS_VAR_POPDEF([ac_HaveDef])
CPPFLAGS=$OLDCPPFLAGS
])
dnl CURL_CHECK_COMPILER_CLANG
dnl -------------------------------------------------
dnl Verify if compiler being used is clang.
AC_DEFUN([CURL_CHECK_COMPILER_CLANG], [
AC_BEFORE([$0],[CURL_CHECK_COMPILER_GNU_C])
AC_MSG_CHECKING([if compiler is clang])
CURL_CHECK_DEF([__clang__], [], [silent])
if test "$curl_cv_have_def___clang__" = "yes"; then
AC_MSG_RESULT([yes])
AC_MSG_CHECKING([if compiler is xlclang])
CURL_CHECK_DEF([__ibmxl__], [], [silent])
if test "$curl_cv_have_def___ibmxl__" = "yes"; then
dnl IBM's almost-compatible clang version
AC_MSG_RESULT([yes])
compiler_id="XLCLANG"
else
AC_MSG_RESULT([no])
compiler_id="CLANG"
fi
flags_dbg_yes="-g"
flags_opt_all="-O -O0 -O1 -O2 -Os -O3 -O4"
flags_opt_yes="-O2"
flags_opt_off="-O0"
else
AC_MSG_RESULT([no])
fi
])
dnl **********************************************************************
dnl CURL_DETECT_ICC ([ACTION-IF-YES])
dnl
dnl check if this is the Intel ICC compiler, and if so run the ACTION-IF-YES
dnl sets the $ICC variable to "yes" or "no"
dnl **********************************************************************
AC_DEFUN([CURL_DETECT_ICC],
[
ICC="no"
AC_MSG_CHECKING([for icc in use])
if test "$GCC" = "yes"; then
dnl check if this is icc acting as gcc in disguise
AC_EGREP_CPP([^__INTEL_COMPILER], [__INTEL_COMPILER],
dnl action if the text is found, this it has not been replaced by the
dnl cpp
ICC="no",
dnl the text was not found, it was replaced by the cpp
ICC="yes"
AC_MSG_RESULT([yes])
[$1]
)
fi
if test "$ICC" = "no"; then
# this is not ICC
AC_MSG_RESULT([no])
fi
])
dnl We create a function for detecting which compiler we use and then set as
dnl pedantic compiler options as possible for that particular compiler. The
dnl options are only used for debug-builds.
AC_DEFUN([CURL_CC_DEBUG_OPTS],
[
if test "z$CLANG" = "z"; then
CURL_CHECK_COMPILER_CLANG
if test "z$compiler_id" = "zCLANG"; then
CLANG="yes"
else
CLANG="no"
fi
fi
if test "z$ICC" = "z"; then
CURL_DETECT_ICC
fi
if test "$CLANG" = "yes"; then
# indentation to match curl's m4/curl-compilers.m4
dnl figure out clang version!
AC_MSG_CHECKING([compiler version])
fullclangver=`$CC -v 2>&1 | grep version`
if echo $fullclangver | grep 'Apple' >/dev/null; then
appleclang=1
else
appleclang=0
fi
clangver=`echo $fullclangver | grep "based on LLVM " | "$SED" 's/.*(based on LLVM \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*)/\1/'`
if test -z "$clangver"; then
clangver=`echo $fullclangver | "$SED" 's/.*version \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/'`
oldapple=0
else
oldapple=1
fi
clangvhi=`echo $clangver | cut -d . -f1`
clangvlo=`echo $clangver | cut -d . -f2`
compiler_num=`(expr $clangvhi "*" 100 + $clangvlo) 2>/dev/null`
if test "$appleclang" = "1" && test "$oldapple" = "0"; then
dnl Starting with Xcode 7 / clang 3.7, Apple clang does not tell its upstream version
if test "$compiler_num" -ge '2604'; then compiler_num='2101'
elif test "$compiler_num" -ge '1700'; then compiler_num='1901'
elif test "$compiler_num" -ge '1600'; then compiler_num='1700'
elif test "$compiler_num" -ge '1500'; then compiler_num='1600'
elif test "$compiler_num" -ge '1400'; then compiler_num='1400'
elif test "$compiler_num" -ge '1301'; then compiler_num='1300'
elif test "$compiler_num" -ge '1300'; then compiler_num='1200'
elif test "$compiler_num" -ge '1200'; then compiler_num='1000'
elif test "$compiler_num" -ge '1100'; then compiler_num='800'
elif test "$compiler_num" -ge '1000'; then compiler_num='600'
elif test "$compiler_num" -ge '901'; then compiler_num='500'
elif test "$compiler_num" -ge '900'; then compiler_num='400'
elif test "$compiler_num" -ge '801'; then compiler_num='309'
elif test "$compiler_num" -ge '703'; then compiler_num='308'
else compiler_num='307'
fi
fi
AC_MSG_RESULT([clang '$compiler_num' (raw: '$fullclangver' / '$clangver')])
if test "$compiler_num" -ge "302"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pedantic])
else
tmp_CFLAGS="$tmp_CFLAGS -pedantic"
fi
if test "$want_werror" = "yes"; then
LIBSSH2_CFLAG_EXTRAS="$LIBSSH2_CFLAG_EXTRAS -pedantic-errors"
fi
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [all extra])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pointer-arith write-strings])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shadow])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [nested-externs])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-declarations])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-prototypes])
tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [float-equal])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-compare])
tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [undef])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [endif-labels strict-prototypes])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [declaration-after-statement])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-align])
tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shorten-64-to-32])
dnl Only clang 1.1 or later
if test "$compiler_num" -ge "101"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused])
fi
dnl Only clang 2.7 or later
if test "$compiler_num" -ge "207"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [address])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [attributes])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [bad-function-cast])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-qual])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [div-by-zero format-security])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [empty-body])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-field-initializers])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-noreturn])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [old-style-definition])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [redundant-decls])
# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [switch-enum]) # Not used: It makes default case unusable
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [type-limits])
if test "x$have_windows_h" != "xyes"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-macros]) # Seen to clash with libtool-generated stub code
fi
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unreachable-code unused-parameter])
fi
dnl Only clang 2.8 or later
if test "$compiler_num" -ge "208"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [ignored-qualifiers])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla])
fi
dnl Only clang 2.9 or later
if test "$compiler_num" -ge "209"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-conversion])
tmp_CFLAGS="$tmp_CFLAGS -Wno-error=sign-conversion" # FIXME
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-sign-overflow])
# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [padded]) # Not used: We cannot change public structs
fi
dnl Only clang 3.0 or later
if test "$compiler_num" -ge "300"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conditional-uninitialized])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [language-extension-token])
tmp_CFLAGS="$tmp_CFLAGS -Wformat=2"
fi
dnl Only clang 3.1 or later
if test "$compiler_num" -ge "301"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [format-non-iso])
fi
dnl Only clang 3.2 or later
if test "$compiler_num" -ge "302"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [enum-conversion])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sometimes-uninitialized])
case $host_os in
cygwin* | mingw*)
dnl skip missing-variable-declarations warnings for Cygwin and
dnl MinGW because the libtool wrapper executable causes them
;;
*)
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-variable-declarations])
;;
esac
fi
dnl Only clang 3.4 or later
if test "$compiler_num" -ge "304"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [header-guard])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-const-variable])
fi
dnl Only clang 3.5 or later
if test "$compiler_num" -ge "305"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pragmas])
# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unreachable-code-break]) # Not used: Silent in "unity" builds
fi
dnl Only clang 3.6 or later
if test "$compiler_num" -ge "306"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [double-promotion])
fi
dnl Only clang 3.9 or later
if test "$compiler_num" -ge "309"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [comma])
dnl avoid the varargs warning, fixed in 4.0
dnl https://bugs.llvm.org/show_bug.cgi?id=29140
if test "$compiler_num" -lt "400"; then
tmp_CFLAGS="$tmp_CFLAGS -Wno-varargs"
fi
fi
dnl clang 7 or later
if test "$compiler_num" -ge "700"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [assign-enum])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [extra-semi-stmt])
fi
dnl clang 10 or later
if test "$compiler_num" -ge "1000"; then
tmp_CFLAGS="$tmp_CFLAGS -Wimplicit-fallthrough" # we have silencing markup for clang 10.0 and above only
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [xor-used-as-pow])
fi
dnl clang 13 or later
if test "$compiler_num" -ge "1300"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-function-type])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [reserved-identifier]) # Keep it before -Wno-reserved-macro-identifier
# tmp_CFLAGS="$tmp_CFLAGS -Wno-reserved-macro-identifier" # Sometimes such external macros need to be set
fi
dnl clang 16 or later
#if test "$compiler_num" -ge "1600"; then
# tmp_CFLAGS="$tmp_CFLAGS -Wno-unsafe-buffer-usage"
#fi
dnl clang 17 or later
if test "$compiler_num" -ge "1700"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-function-type-strict]) # with Apple clang it requires 16.0 or above
fi
dnl clang 19 or later
if test "$compiler_num" -ge "1901"; then
tmp_CFLAGS="$tmp_CFLAGS -Wformat-signedness"
fi
dnl clang 20 or later
if test "$compiler_num" -ge "2001"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [array-compare])
fi
dnl clang 21 or later
if test "$compiler_num" -ge "2101"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [c++-hidden-decl])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [implicit-int-enum-cast])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [jump-misses-init])
tmp_CFLAGS="$tmp_CFLAGS -Wno-implicit-void-ptr-cast"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [tentative-definition-compat])
if test "$curl_cv_native_windows" = "yes"; then
tmp_CFLAGS="$tmp_CFLAGS -Wno-c++-keyword" # `wchar_t` triggers it on Windows
else
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [c++-keyword])
fi
fi
case "$CFLAGS" in
*-std=c89*|*-std=c90*|*-std=gnu89*|*-std=gnu90*)
if test "$compiler_num" -ge "309"; then
tmp_CFLAGS="$tmp_CFLAGS -Wno-comma" # Silly
fi
;;
esac
CFLAGS="$CFLAGS $tmp_CFLAGS"
AC_MSG_NOTICE([Added this set of compiler options: $tmp_CFLAGS])
elif test "$GCC" = "yes"; then
# indentation to match curl's m4/curl-compilers.m4
dnl figure out gcc version!
AC_MSG_CHECKING([compiler version])
# strip '-suffix' parts, e.g. Ubuntu Windows cross-gcc returns '10-win32'
gccver=`$CC -dumpversion | sed -E 's/-.+$//'`
gccvhi=`echo $gccver | cut -d . -f1`
if echo $gccver | grep -F "." >/dev/null; then
gccvlo=`echo $gccver | cut -d . -f2`
else
gccvlo="0"
fi
compiler_num=`(expr $gccvhi "*" 100 + $gccvlo) 2>/dev/null`
AC_MSG_RESULT([gcc '$compiler_num' (raw: '$gccver')])
if test "$ICC" = "yes"; then
dnl this is icc, not gcc.
dnl ICC warnings we ignore:
dnl * 269 warns on our "%Od" printf formatters for curl_off_t output:
dnl "invalid format string conversion"
dnl * 279 warns on static conditions in while expressions
dnl * 981 warns on "operands are evaluated in unspecified order"
dnl * 1418 "external definition with no prior declaration"
dnl * 1419 warns on "external declaration in primary source file"
dnl which we know and do on purpose.
tmp_CFLAGS="-wd279,269,981,1418,1419"
if test "$compiler_num" -gt "600"; then
dnl icc 6.0 and older does not have the -Wall flag
tmp_CFLAGS="-Wall $tmp_CFLAGS"
fi
else dnl $ICC = yes
dnl this is a set of options we believe *ALL* gcc versions support:
if test "$compiler_num" -ge "408"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pedantic])
else
tmp_CFLAGS="$tmp_CFLAGS -pedantic"
fi
if test "$want_werror" = "yes"; then
LIBSSH2_CFLAG_EXTRAS="$LIBSSH2_CFLAG_EXTRAS -pedantic-errors"
fi
dnl Set of options we believe *ALL* gcc versions support:
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [all])
tmp_CFLAGS="$tmp_CFLAGS -W"
dnl Only gcc 1.4 or later
if test "$compiler_num" -ge "104"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pointer-arith write-strings])
dnl If not cross-compiling with a gcc older than 3.0
if test "$cross_compiling" != "yes" ||
test "$compiler_num" -ge "300"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused shadow])
fi
fi
dnl Only gcc 2.7 or later
if test "$compiler_num" -ge "207"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [nested-externs])
dnl If not cross-compiling with a gcc older than 3.0
if test "$cross_compiling" != "yes" ||
test "$compiler_num" -ge "300"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-declarations])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-prototypes])
fi
fi
dnl Only gcc 2.95 or later
if test "$compiler_num" -ge "295"; then
tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [bad-function-cast])
fi
dnl Only gcc 2.96 or later
if test "$compiler_num" -ge "296"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [float-equal])
tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-compare])
dnl -Wundef used only if gcc is 2.96 or later since we get
dnl lots of "`_POSIX_C_SOURCE' is not defined" in system
dnl headers with gcc 2.95.4 on FreeBSD 4.9
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [undef])
fi
dnl Only gcc 3.0 or later
if test "$compiler_num" -ge "300"; then
tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers"
dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
dnl on i686-Linux as it gives us heaps with false positives.
dnl Also, on gcc 4.0.X it is totally unbearable and complains all
dnl over making it unusable for generic purposes. Let's not use it.
tmp_CFLAGS="$tmp_CFLAGS"
fi
dnl Only gcc 3.3 or later
if test "$compiler_num" -ge "303"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [endif-labels strict-prototypes])
fi
dnl Only gcc 3.4 or later
if test "$compiler_num" -ge "304"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [declaration-after-statement])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [old-style-definition])
fi
dnl Only gcc 4.0 or later
if test "$compiler_num" -ge "400"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-qual])
tmp_CFLAGS="$tmp_CFLAGS -Wstrict-aliasing=3"
fi
dnl Only gcc 4.1 or later
if test "$compiler_num" -ge "401"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [attributes])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [div-by-zero format-security])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-field-initializers])
case $host in
*-*-msys*)
;;
*)
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-noreturn]) # Seen to clash with libtool-generated stub code
;;
esac
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unreachable-code unused-parameter])
# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [padded]) # Not used: We cannot change public structs
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pragmas])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [redundant-decls])
# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [switch-enum]) # Not used: It makes default case unusable
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-macros])
fi
dnl Only gcc 4.2 or later
if test "$compiler_num" -ge "402"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-align])
fi
dnl Only gcc 4.3 or later
if test "$compiler_num" -ge "403"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [address])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [type-limits old-style-declaration])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-parameter-type empty-body])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [clobbered ignored-qualifiers])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-conversion])
tmp_CFLAGS="$tmp_CFLAGS -Wno-error=sign-conversion" # FIXME
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla])
dnl required for -Warray-bounds, included in -Wall
tmp_CFLAGS="$tmp_CFLAGS -ftree-vrp"
fi
dnl Only gcc 4.4 or later
if test "$compiler_num" -ge "404"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [logical-op])
fi
dnl Only gcc 4.5 or later
if test "$compiler_num" -ge "405"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [jump-misses-init])
dnl Only Windows targets
case $host_os in
cygwin*)
dnl Silence warning in 'lt_fatal' libtool function
tmp_CFLAGS="$tmp_CFLAGS -Wno-suggest-attribute=noreturn"
;;
esac
fi
dnl Only gcc 4.6 or later
if test "$compiler_num" -ge "406"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [double-promotion])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [trampolines])
fi
dnl only gcc 4.8 or later
if test "$compiler_num" -ge "408"; then
tmp_CFLAGS="$tmp_CFLAGS -Wformat=2"
fi
dnl Only gcc 5 or later
if test "$compiler_num" -ge "500"; then
tmp_CFLAGS="$tmp_CFLAGS -Warray-bounds=2"
tmp_CFLAGS="$tmp_CFLAGS -Wformat-signedness"
fi
dnl Only gcc 6 or later
if test "$compiler_num" -ge "600"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-negative-value])
tmp_CFLAGS="$tmp_CFLAGS -Wshift-overflow=2"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [null-dereference])
tmp_CFLAGS="$tmp_CFLAGS -fdelete-null-pointer-checks"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [duplicated-cond])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-const-variable])
fi
dnl Only gcc 7 or later
if test "$compiler_num" -ge "700"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [duplicated-branches])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [restrict])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [alloc-zero])
tmp_CFLAGS="$tmp_CFLAGS -Wformat-overflow=2"
tmp_CFLAGS="$tmp_CFLAGS -Wformat-truncation=2"
tmp_CFLAGS="$tmp_CFLAGS -Wimplicit-fallthrough"
fi
dnl Only gcc 10 or later
if test "$compiler_num" -ge "1000"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [arith-conversion])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [enum-conversion])
fi
dnl Only gcc 12 or later
if test "$compiler_num" -ge "1200"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [array-compare])
fi
dnl Only gcc 13 or later
if test "$compiler_num" -ge "1300"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [enum-int-mismatch])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [xor-used-as-pow])
fi
dnl Only gcc 15 or later
if test "$compiler_num" -ge "1500"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [leading-whitespace=spaces])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [trailing-whitespace=any])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unterminated-string-initialization])
fi
fi dnl $ICC = no
CFLAGS="$CFLAGS $tmp_CFLAGS"
AC_MSG_NOTICE([Added this set of compiler options: $tmp_CFLAGS])
else dnl $GCC = yes
AC_MSG_NOTICE([Added no extra compiler options])
fi dnl $GCC = yes
dnl strip off optimizer flags
NEWFLAGS=""
for flag in $CFLAGS; do
case "$flag" in
-O*)
dnl echo "cut off $flag"
;;
*)
NEWFLAGS="$NEWFLAGS $flag"
;;
esac
done
CFLAGS=$NEWFLAGS
]) dnl end of AC_DEFUN()
dnl CURL_CONVERT_INCLUDE_TO_ISYSTEM
dnl -------------------------------------------------
dnl Changes standard include paths present in CFLAGS
dnl and CPPFLAGS into isystem include paths. This is
dnl done to prevent GNUC from generating warnings on
dnl headers from these locations, although on ancient
dnl GNUC versions these warnings are not silenced.
AC_DEFUN([CURL_CONVERT_INCLUDE_TO_ISYSTEM], [
AC_REQUIRE([CURL_SHFUNC_SQUEEZE])
AC_REQUIRE([CURL_CHECK_COMPILER_CLANG])
AC_MSG_CHECKING([convert -I options to -isystem])
if test "$compiler_id" = "GNU_C" ||
test "$compiler_id" = "CLANG" ||
test "$compiler_id" = "APPLECLANG"; then
AC_MSG_RESULT([yes])
tmp_has_include="no"
tmp_chg_FLAGS="$CFLAGS"
for word1 in $tmp_chg_FLAGS; do
case "$word1" in
-I*)
tmp_has_include="yes"
;;
esac
done
if test "$tmp_has_include" = "yes"; then
tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/^-I/ -isystem /g'`
tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/ -I/ -isystem /g'`
CFLAGS="$tmp_chg_FLAGS"
squeeze CFLAGS
fi
tmp_has_include="no"
tmp_chg_FLAGS="$CPPFLAGS"
for word1 in $tmp_chg_FLAGS; do
case "$word1" in
-I*)
tmp_has_include="yes"
;;
esac
done
if test "$tmp_has_include" = "yes"; then
tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/^-I/ -isystem /g'`
tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/ -I/ -isystem /g'`
CPPFLAGS="$tmp_chg_FLAGS"
squeeze CPPFLAGS
fi
else
AC_MSG_RESULT([no])
fi
])
dnl CURL_ADD_COMPILER_WARNINGS (WARNING-LIST, NEW-WARNINGS)
dnl -------------------------------------------------------
dnl Contents of variable WARNING-LIST and NEW-WARNINGS are
dnl handled as whitespace separated lists of words.
dnl Add each compiler warning from NEW-WARNINGS that has not
dnl been disabled via CFLAGS to WARNING-LIST.
AC_DEFUN([CURL_ADD_COMPILER_WARNINGS], [
AC_REQUIRE([CURL_SHFUNC_SQUEEZE])
ac_var_added_warnings=""
for warning in [$2]; do
CURL_VAR_MATCH(CFLAGS, [-Wno-$warning -W$warning])
if test "$ac_var_match_word" = "no"; then
ac_var_added_warnings="$ac_var_added_warnings -W$warning"
fi
done
dnl squeeze whitespace out of result
[$1]="$[$1] $ac_var_added_warnings"
squeeze [$1]
])
dnl CURL_SHFUNC_SQUEEZE
dnl -------------------------------------------------
dnl Declares a shell function squeeze() which removes
dnl redundant whitespace out of a shell variable.
AC_DEFUN([CURL_SHFUNC_SQUEEZE], [
squeeze() {
_sqz_result=""
eval _sqz_input=\[$][$]1
for _sqz_token in $_sqz_input; do
if test -z "$_sqz_result"; then
_sqz_result="$_sqz_token"
else
_sqz_result="$_sqz_result $_sqz_token"
fi
done
eval [$]1=\$_sqz_result
return 0
}
])
dnl CURL_VAR_MATCH (VARNAME, VALUE)
dnl -------------------------------------------------
dnl Verifies if shell variable VARNAME contains VALUE.
dnl Contents of variable VARNAME and VALUE are handled
dnl as whitespace separated lists of words. If at least
dnl one word of VALUE is present in VARNAME the match
dnl is considered positive, otherwise false.
AC_DEFUN([CURL_VAR_MATCH], [
ac_var_match_word="no"
for word1 in $[$1]; do
for word2 in [$2]; do
if test "$word1" = "$word2"; then
ac_var_match_word="yes"
fi
done
done
])
dnl CURL_CHECK_NONBLOCKING_SOCKET
dnl -------------------------------------------------
dnl Check for how to set a socket to non-blocking state. There seems to exist
dnl four known different ways, with the one used almost everywhere being POSIX
dnl and XPG3, while the other different ways for different systems (old BSD,
dnl Windows and Amiga).
dnl
dnl There are two known platforms (AIX 3.x and SunOS 4.1.x) where the
dnl O_NONBLOCK define is found but does not work. This condition is attempted
dnl to get caught in this script by using an excessive number of #ifdefs...
dnl
AC_DEFUN([CURL_CHECK_NONBLOCKING_SOCKET],
[
AC_MSG_CHECKING([non-blocking sockets style])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
/* headers for O_NONBLOCK test */
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
]], [[
/* try to compile O_NONBLOCK */
#if defined(sun) || defined(__sun__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
# if defined(__SVR4) || defined(__srv4__)
# define PLATFORM_SOLARIS
# else
# define PLATFORM_SUNOS4
# endif
#endif
#if (defined(_AIX) || defined(__xlC__)) && !defined(_AIX41)
# define PLATFORM_AIX_V3
#endif
#if defined(PLATFORM_SUNOS4) || defined(PLATFORM_AIX_V3) || defined(__BEOS__)
#error "O_NONBLOCK does not work on this platform"
#endif
int socket;
int flags = fcntl(socket, F_SETFL, flags | O_NONBLOCK);
]])],[
dnl the O_NONBLOCK test was fine
nonblock="O_NONBLOCK"
AC_DEFINE(HAVE_O_NONBLOCK, 1, [use O_NONBLOCK for non-blocking sockets])
],[
dnl the code was bad, try a different program now, test 2
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
/* headers for FIONBIO test */
#include <unistd.h>
#include <stropts.h>
]], [[
/* FIONBIO source test (old-style unix) */
int socket;
int flags = ioctl(socket, FIONBIO, &flags);
]])],[
dnl FIONBIO test was good
nonblock="FIONBIO"
AC_DEFINE(HAVE_FIONBIO, 1, [use FIONBIO for non-blocking sockets])
],[
dnl FIONBIO test was also bad
dnl the code was bad, try a different program now, test 3
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
/* headers for IoctlSocket test (Amiga?) */
#include <sys/ioctl.h>
]], [[
/* IoctlSocket source code */
int socket;
int flags = IoctlSocket(socket, FIONBIO, (long)1);
]])],[
dnl ioctlsocket test was good
nonblock="IoctlSocket"
AC_DEFINE(HAVE_IOCTLSOCKET_CASE, 1, [use Ioctlsocket() for non-blocking sockets])
],[
dnl Ioctlsocket did not compile, do test 4!
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
/* headers for SO_NONBLOCK test (BeOS) */
#include <socket.h>
]], [[
/* SO_NONBLOCK source code */
long b = 1;
int socket;
int flags = setsockopt(socket, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b));
]])],[
dnl the SO_NONBLOCK test was good
nonblock="SO_NONBLOCK"
AC_DEFINE(HAVE_SO_NONBLOCK, 1, [use SO_NONBLOCK for non-blocking sockets])
],[
dnl test 4 did not compile!
nonblock="nada"
])
dnl end of forth test
])
dnl end of third test
])
dnl end of second test
])
dnl end of non-blocking try-compile test
AC_MSG_RESULT($nonblock)
if test "$nonblock" = "nada"; then
AC_MSG_WARN([non-block sockets disabled])
fi
])
dnl CURL_CHECK_NEED_REENTRANT_SYSTEM
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl must be unconditionally done for this platform.
dnl Internal macro for CURL_CONFIGURE_REENTRANT.
AC_DEFUN([CURL_CHECK_NEED_REENTRANT_SYSTEM], [
case $host in
*-*-solaris* | *-*-hpux*)
tmp_need_reentrant="yes"
;;
*)
tmp_need_reentrant="no"
;;
esac
])
dnl CURL_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT
dnl -------------------------------------------------
dnl This macro ensures that configuration tests done
dnl after this execute with preprocessor symbol
dnl _REENTRANT defined. This macro also ensures that
dnl the generated config file defines NEED_REENTRANT
dnl and that in turn setup.h defines _REENTRANT.
dnl Internal macro for CURL_CONFIGURE_REENTRANT.
AC_DEFUN([CURL_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT], [
AC_DEFINE(NEED_REENTRANT, 1,
[Define to 1 if _REENTRANT preprocessor symbol must be defined.])
cat >>confdefs.h <<_EOF
#ifndef _REENTRANT
# define _REENTRANT
#endif
_EOF
])
dnl CURL_CONFIGURE_REENTRANT
dnl -------------------------------------------------
dnl This first checks if the preprocessor _REENTRANT
dnl symbol is already defined. If it is not currently
dnl defined a set of checks are performed to verify
dnl if its definition is required to make visible to
dnl the compiler a set of *_r functions. Finally, if
dnl _REENTRANT is already defined or needed it takes
dnl care of making adjustments necessary to ensure
dnl that it is defined equally for further configure
dnl tests and generated config file.
AC_DEFUN([CURL_CONFIGURE_REENTRANT], [
AC_PREREQ([2.50])
AC_MSG_CHECKING([if _REENTRANT is already defined])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
]],[[
#ifdef _REENTRANT
int dummy = 1;
#else
force compilation error
#endif
]])
],[
AC_MSG_RESULT([yes])
tmp_reentrant_initially_defined="yes"
],[
AC_MSG_RESULT([no])
tmp_reentrant_initially_defined="no"
])
if test "$tmp_reentrant_initially_defined" = "no"; then
AC_MSG_CHECKING([if _REENTRANT is actually needed])
CURL_CHECK_NEED_REENTRANT_SYSTEM
if test "$tmp_need_reentrant" = "yes"; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
fi
AC_MSG_CHECKING([if _REENTRANT is onwards defined])
if test "$tmp_reentrant_initially_defined" = "yes" ||
test "$tmp_need_reentrant" = "yes"; then
CURL_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
])
dnl LIBSSH2_LIB_HAVE_LINKFLAGS
dnl --------------------------
dnl Wrapper around LIBSSH2_HAVE_LINKFLAGS to also check $prefix/lib, if set.
dnl
dnl autoconf only checks $prefix/lib64 if gcc -print-search-dirs output
dnl includes a directory named lib64. To find libraries in $prefix/lib
dnl we append -L$prefix/lib to LDFLAGS before checking.
dnl
dnl For convenience, $4 is expanded if [lib]$1 is found.
AC_DEFUN([LIBSSH2_LIB_HAVE_LINKFLAGS], [
libssh2_save_CPPFLAGS="$CPPFLAGS"
libssh2_save_LDFLAGS="$LDFLAGS"
if test "${with_lib$1_prefix+set}" = set -a "${with_lib$1_prefix}" != 'no'; then
CPPFLAGS="$CPPFLAGS${CPPFLAGS:+ }-I${with_lib$1_prefix}/include"
LDFLAGS="$LDFLAGS${LDFLAGS:+ }-L${with_lib$1_prefix}/lib"
fi
LIBSSH2_HAVE_LINKFLAGS([$1], [$2], [$3])
if test "$ac_cv_lib$1" = "yes"; then :
$4
else