summaryrefslogtreecommitdiff
path: root/configure.in
blob: 77ece4418a0998b31c8eea83723c4bbd16175699 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
AC_INIT(ssh.c)

AC_CONFIG_HEADER(config.h)
AC_PROG_CC
AC_CANONICAL_HOST

# Checks for programs.
AC_PROG_CPP
AC_PROG_RANLIB
AC_PROG_INSTALL
AC_CHECK_PROG(AR, ar, ar)
AC_PATH_PROG(PERL, perl)
AC_SUBST(PERL)
AC_PATH_PROG(ENT, ent)
AC_SUBST(ENT)

if test -z "$LD" ; then
	LD=$CC
fi
AC_SUBST(LD)
	
# C Compiler features
AC_C_INLINE
if test "$GCC" = "yes"; then 
	CFLAGS="$CFLAGS -Wall"
fi

# Check for some target-specific stuff
case "$host" in
*-*-aix*)
	AFS_LIBS="-lld"
	CFLAGS="$CFLAGS -I/usr/local/include"
	LDFLAGS="$LDFLAGS -L/usr/local/lib"
	if test "$LD" != "gcc" -a -z "$blibpath"; then
		blibpath="/usr/lib:/lib:/usr/local/lib"
	fi
	AC_CHECK_FUNC(authenticate, [AC_DEFINE(WITH_AIXAUTHENTICATE)])
	AC_DEFINE(BROKEN_GETADDRINFO)
	MANTYPE='$(CATMAN)'
	mansubdir=cat
	dnl AIX handles lastlog as part of its login message
	AC_DEFINE(DISABLE_LASTLOG)
	;;
*-*-hpux10*)
	if test -z "$GCC"; then
		CFLAGS="$CFLAGS -Ae"
	fi
	CFLAGS="$CFLAGS -D_HPUX_SOURCE"
	AC_DEFINE(IPADDR_IN_DISPLAY)
	AC_MSG_CHECKING(for HPUX trusted system password database)
	if test -f /tcb/files/auth/system/default; then
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_HPUX_TRUSTED_SYSTEM_PW)
		LIBS="$LIBS -lsec"
		AC_MSG_WARN([This configuration is untested])
	else
		AC_MSG_RESULT(no)
		AC_DEFINE(DISABLE_SHADOW)
	fi
	MANTYPE='$(CATMAN)'
	mansubdir=cat
	;;
*-*-hpux11*)
	if test -z "$GCC"; then
		CFLAGS="$CFLAGS -Ae"
	fi
	CFLAGS="$CFLAGS -D_HPUX_SOURCE"
	AC_DEFINE(IPADDR_IN_DISPLAY)
	AC_MSG_CHECKING(for HPUX trusted system password database)
	if test -f /tcb/files/auth/system/default; then
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_HPUX_TRUSTED_SYSTEM_PW)
		LIBS="$LIBS -lsec"
		AC_MSG_WARN([This configuration is untested])
	else
		AC_MSG_RESULT(no)
		AC_DEFINE(DISABLE_SHADOW)
	fi
	MANTYPE='$(CATMAN)'
	mansubdir=cat
	;;
*-*-irix5*)
	CFLAGS="$CFLAGS -I/usr/local/include"
	LDFLAGS="$LDFLAGS"
	MANTYPE='$(CATMAN)'
	no_libsocket=1
	no_libnsl=1
	;;
*-*-irix6*)
	CFLAGS="$CFLAGS -I/usr/local/include"
	LDFLAGS="$LDFLAGS"
	MANTYPE='$(CATMAN)'
	AC_MSG_WARN([*** Irix 6.x is not tested, please report you experiences *** ])
	no_libsocket=1
	no_libnsl=1
	;;
*-*-linux*)
	no_dev_ptmx=1
	AC_DEFINE(DONT_TRY_OTHER_AF)
	inet6_default_4in6=yes
	;;
*-*-netbsd*)
	need_dash_r=1
	;;
*-*-solaris*)
	CFLAGS="$CFLAGS -I/usr/local/include"
	LDFLAGS="$LDFLAGS -L/usr/local/lib -R/usr/local/lib -L/usr/ucblib -R/usr/ucblib"
	need_dash_r=1
	# hardwire lastlog location (can't detect it on some versions)
	conf_lastlog_location="/var/adm/lastlog"
	AC_MSG_CHECKING(for obsolete utmp and wtmp in solaris2.x)
	sol2ver=`echo "$host"| sed -e 's/.*[[0-9]]\.//'`
	if test "$sol2ver" -ge 8; then
		AC_MSG_RESULT(yes)
		AC_DEFINE(DISABLE_UTMP)
		AC_DEFINE(DISABLE_WTMP)
	else
		AC_MSG_RESULT(no)
	fi
	;;
*-*-sunos4*)
	CFLAGS="$CFLAGS -DSUNOS4"
	AC_CHECK_FUNCS(getpwanam)
	;;
*-*-sysv*)
	CFLAGS="$CFLAGS -I/usr/local/include"
	LDFLAGS="$LDFLAGS -L/usr/local/lib"
	MANTYPE='$(CATMAN)'
	mansubdir=cat
	LIBS="$LIBS -lgen -lsocket"
	;;
esac

# Allow user to specify flags
AC_ARG_WITH(cflags,
	[  --with-cflags           Specify additional flags to pass to compiler],
	[
		if test "x$withval" != "xno" ; then
			CFLAGS="$CFLAGS $withval"
		fi
	]	
)
AC_ARG_WITH(ldflags,
	[  --with-ldlags           Specify additional flags to pass to linker],
	[
		if test "x$withval" != "xno" ; then
			LDFLAGS="$LDFLAGS $withval"
		fi
	]	
)
AC_ARG_WITH(libs,
	[  --with-libs             Specify additional libraries to link with],
	[
		if test "x$withval" != "xno" ; then
			LIBS="$LIBS $withval"
		fi
	]	
)


# Checks for libraries.
AC_CHECK_LIB(z, deflate, ,AC_MSG_ERROR([*** zlib missing - please install first ***]))
AC_CHECK_LIB(util, login, AC_DEFINE(HAVE_LIBUTIL_LOGIN) LIBS="$LIBS -lutil")

if test -z "$no_libsocket" ; then
	AC_CHECK_LIB(nsl, yp_match, , )
fi
if test -z "$no_libnsl" ; then
	AC_CHECK_LIB(socket, main, , )
fi

# Checks for header files.
AC_CHECK_HEADERS(bstring.h endian.h lastlog.h login.h maillock.h netdb.h netgroup.h netinet/in_systm.h paths.h poll.h pty.h shadow.h security/pam_appl.h sys/bitypes.h sys/bsdtty.h sys/cdefs.h sys/poll.h sys/select.h sys/stropts.h sys/sysmacros.h sys/time.h sys/ttcompat.h stddef.h time.h util.h utmp.h utmpx.h)

# Checks for library functions.
AC_CHECK_FUNCS(arc4random atexit b64_ntop bcopy bindresvport_af clock freeaddrinfo gai_strerror getaddrinfo getnameinfo getrusage innetgr md5_crypt memmove mkdtemp on_exit openpty rresvport_af setenv seteuid setlogin setproctitle setreuid snprintf strlcat strlcpy vsnprintf vhangup _getpty __b64_ntop)
dnl    checks for time functions
AC_CHECK_FUNCS(gettimeofday time)
dnl    checks for libutil functions
AC_CHECK_FUNCS(login logout updwtmp logwtmp)
dnl    checks for utmp functions
AC_CHECK_FUNCS(entutent getutent getutid getutline pututline setutent)
AC_CHECK_FUNCS(utmpname)
dnl    checks for utmpx functions
AC_CHECK_FUNCS(entutxent getutxent getutxid getutxline pututxline )
AC_CHECK_FUNCS(setutxent utmpxname)

AC_CHECK_FUNC(login, 
	[AC_DEFINE(HAVE_LOGIN)],
	[AC_CHECK_LIB(bsd, login, [LIBS="$LIBS -lbsd"; AC_DEFINE(HAVE_LOGIN)])]
)

AC_CHECK_FUNC(daemon, 
	[AC_DEFINE(HAVE_DAEMON)],
	[AC_CHECK_LIB(bsd, daemon, [LIBS="$LIBS -lbsd"; AC_DEFINE(HAVE_DAEMON)])]
)

AC_CHECK_FUNC(getpagesize, 
	[AC_DEFINE(HAVE_GETPAGESIZE)],
	[AC_CHECK_LIB(ucb, getpagesize, [LIBS="$LIBS -lucb"; AC_DEFINE(HAVE_GETPAGESIZE)])]
)

AC_ARG_WITH(pam,
	[  --without-pam           Disable PAM support ],
	[
		if test "x$withval" = "xno" ; then
			no_pam=1
			AC_DEFINE(DISABLE_PAM)
		fi
	]
)
if test -z "$no_pam" -a "x$ac_cv_header_security_pam_appl_h" = "xyes" ; then
	AC_CHECK_LIB(dl, dlopen, , )
	LIBS="$LIBS -lpam"

	AC_CHECK_FUNCS(pam_getenvlist)

	# Check PAM strerror arguments (old PAM)
	AC_MSG_CHECKING([whether pam_strerror takes only one argument])
	AC_TRY_COMPILE(
		[
#include <stdlib.h>
#include <security/pam_appl.h>
		], 
		[(void)pam_strerror((pam_handle_t *)NULL, -1);], 
		[AC_MSG_RESULT(no)],
		[
			AC_DEFINE(HAVE_OLD_PAM)
			AC_MSG_RESULT(yes)
		]
	) 
fi

# The big search for OpenSSL
AC_ARG_WITH(ssl-dir,
	[  --with-ssl-dir=PATH     Specify path to OpenSSL installation ],
	[
		if test "x$withval" != "$xno" ; then
			tryssldir=$withval
		fi
	]
)

saved_LIBS="$LIBS"
saved_LDFLAGS="$LDFLAGS"
saved_CFLAGS="$CFLAGS"
if test "x$prefix" != "xNONE" ; then
	tryssldir="$tryssldir $prefix"
fi
AC_CACHE_CHECK([for OpenSSL directory], ac_cv_openssldir, [

	for ssldir in "" $tryssldir /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/pkg /opt /opt/openssl ; do
		if test ! -z "$ssldir" ; then
			LDFLAGS="$saved_LDFLAGS -L$ssldir/lib -L$ssldir"
			CFLAGS="$saved_CFLAGS -I$ssldir/include"
			if test ! -z "$need_dash_r" ; then
				LDFLAGS="$LDFLAGS -R$ssldir/lib -R$ssldir"
			fi
		else
			LDFLAGS="$saved_LDFLAGS"
		fi

		LIBS="$saved_LIBS -lcrypto"

		# Basic test to check for compatible version and correct linking
		# *does not* test for RSA - that comes later.
		AC_TRY_RUN(
			[
#include <string.h>
#include <openssl/rand.h>
int main(void) 
{
	char a[2048];
	memset(a, 0, sizeof(a));
	RAND_add(a, sizeof(a), sizeof(a));
	return(RAND_status() <= 0);
}
			],
			[
				found_crypto=1
				break;
			], []
		)

		if test ! -z "$found_crypto" ; then
			break;
		fi
	done

	if test -z "$found_crypto" ; then
		AC_MSG_ERROR([Could not find working SSLeay / OpenSSL libraries, please install])	
	fi
	if test -z "$ssldir" ; then
		ssldir="(system)"
	fi

	ac_cv_openssldir=$ssldir
])

if test ! -z "$ac_cv_openssldir" -a ! "x$ac_cv_openssldir" = "x(system)" ; then
	AC_DEFINE(HAVE_OPENSSL)
	dnl Need to recover ssldir - test above runs in subshell
	ssldir=$ac_cv_openssldir
	CFLAGS="$saved_CFLAGS -I$ssldir/include"
	LDFLAGS="$saved_LDFLAGS -L$ssldir/lib -L$ssldir"
	if test ! -z "$need_dash_r" ; then
		LDFLAGS="$LDFLAGS -R$ssldir/lib -R$ssldir"
	fi
	if test ! -z "$blibpath" ; then
		blibpath="$blibpath:$ssldir:$ssldir/lib"
	fi
fi
LIBS="$saved_LIBS -lcrypto"

# Now test RSA support
saved_LIBS="$LIBS"
AC_MSG_CHECKING([for RSA support])
for WANTS_RSAREF in "" 1 ; do
	if test -z "$WANTS_RSAREF" ; then
		LIBS="$saved_LIBS"
	else
		LIBS="$saved_LIBS -lRSAglue -lrsaref"
	fi
	AC_TRY_RUN([
#include <string.h>
#include <openssl/rand.h>
#include <openssl/rsa.h>
#include <openssl/bn.h>
#include <openssl/sha.h>
int main(void) 
{
	int num; RSA *key; static unsigned char p_in[] = "blahblah";
	unsigned char c[256], p[256];
	memset(c, 0, sizeof(c)); RAND_add(c, sizeof(c), sizeof(c));
	if ((key=RSA_generate_key(512, 3, NULL, NULL))==NULL) return(1);
	num = RSA_public_encrypt(sizeof(p_in) - 1, p_in, c, key, RSA_PKCS1_PADDING);
	return(-1 == RSA_private_decrypt(num, c, p, key, RSA_PKCS1_PADDING));
}
	],
	[
		rsa_works=1
		break;
	], [])
done

if test ! -z "$no_rsa" ; then
	AC_MSG_RESULT(disabled)
else
	if test -z "$rsa_works" ; then
		AC_MSG_WARN([*** No RSA support found *** ])
	else
		if test -z "$WANTS_RSAREF" ; then
			AC_MSG_RESULT(yes)
		else
			AC_MSG_RESULT(using RSAref)
			LIBS="$saved_LIBS -lcrypto -lRSAglue -lrsaref"
		fi
	fi
fi

# Checks for data types
AC_CHECK_SIZEOF(char, 1)
AC_CHECK_SIZEOF(short int, 2)
AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long int, 4)
AC_CHECK_SIZEOF(long long int, 8)

# More checks for data types
AC_CACHE_CHECK([for intXX_t types], ac_cv_have_intxx_t, [
	AC_TRY_COMPILE(
		[ #include <sys/types.h> ], 
		[ int8_t a; int16_t b; int32_t c; a = b = c = 1;], 
		[ ac_cv_have_intxx_t="yes" ],
		[ ac_cv_have_intxx_t="no" ]
	)
])
if test "x$ac_cv_have_intxx_t" = "xyes" ; then
	AC_DEFINE(HAVE_INTXX_T)
	have_intxx_t=1
fi
	
AC_CACHE_CHECK([for u_intXX_t types], ac_cv_have_u_intxx_t, [
	AC_TRY_COMPILE(
		[ #include <sys/types.h> ], 
		[ u_int8_t a; u_int16_t b; u_int32_t c; a = b = c = 1;], 
		[ ac_cv_have_u_intxx_t="yes" ],
		[ ac_cv_have_u_intxx_t="no" ]
	)
])
if test "x$ac_cv_have_u_intxx_t" = "xyes" ; then
	AC_DEFINE(HAVE_U_INTXX_T)
	have_u_intxx_t=1
fi


if test -z "$have_u_intxx_t" -o -z "$have_intxx_t" -a \
           "x$ac_cv_header_sys_bitypes_h" = "xyes"
then
	AC_MSG_CHECKING([for intXX_t and u_intXX_t types in sys/bitypes.h])
	AC_TRY_COMPILE(
		[
#include <sys/bitypes.h>
		], 
		[
			int8_t a; int16_t b; int32_t c;
			u_int8_t e; u_int16_t f; u_int32_t g;
			a = b = c = e = f = g = 1;
		], 
		[
			AC_DEFINE(HAVE_U_INTXX_T)
			AC_DEFINE(HAVE_INTXX_T)
			AC_MSG_RESULT(yes)
		],
		[AC_MSG_RESULT(no)]
	) 
fi

if test -z "$have_u_intxx_t" ; then
	AC_CACHE_CHECK([for uintXX_t types], ac_cv_have_uintxx_t, [
		AC_TRY_COMPILE(
			[
#include <sys/types.h>
			], 
			[ uint8_t a; uint16_t b; uint32_t c; a = b = c = 1; ], 
			[ ac_cv_have_uintxx_t="yes" ],
			[ ac_cv_have_uintxx_t="no" ]
		)
	])
	if test "x$ac_cv_have_uintxx_t" = "xyes" ; then
		AC_DEFINE(HAVE_UINTXX_T)
	fi
fi

AC_CACHE_CHECK([for socklen_t], ac_cv_have_socklen_t, [
	AC_TRY_COMPILE(
		[
#include <sys/types.h>
#include <sys/socket.h>
		],
		[socklen_t foo; foo = 1235;],
		[ ac_cv_have_socklen_t="yes" ],
		[ ac_cv_have_socklen_t="no" ]
	)
])
if test "x$ac_cv_have_socklen_t" = "xyes" ; then
	AC_DEFINE(HAVE_SOCKLEN_T)
fi

AC_CACHE_CHECK([for size_t], ac_cv_have_size_t, [
	AC_TRY_COMPILE(
		[
#include <sys/types.h>
		],
		[ size_t foo; foo = 1235; ],
		[ ac_cv_have_size_t="yes" ],
		[ ac_cv_have_size_t="no" ]
	)
])
if test "x$ac_cv_have_size_t" = "xyes" ; then
	AC_DEFINE(HAVE_SIZE_T)
fi

AC_CACHE_CHECK([for ssize_t], ac_cv_have_ssize_t, [
	AC_TRY_COMPILE(
		[
#include <sys/types.h>
		],
		[ ssize_t foo; foo = 1235; ],
		[ ac_cv_have_ssize_t="yes" ],
		[ ac_cv_have_ssize_t="no" ]
	)
])
if test "x$ac_cv_have_ssize_t" = "xyes" ; then
	AC_DEFINE(HAVE_SSIZE_T)
fi


AC_CACHE_CHECK([for struct sockaddr_storage], ac_cv_have_struct_sockaddr_storage, [
	AC_TRY_COMPILE(
		[
#include <sys/types.h>
#include <sys/socket.h>
		],
		[ struct sockaddr_storage s; ],
		[ ac_cv_have_struct_sockaddr_storage="yes" ],
		[ ac_cv_have_struct_sockaddr_storage="no" ]
	)
])
if test "x$ac_cv_have_struct_sockaddr_storage" = "xyes" ; then
	AC_DEFINE(HAVE_STRUCT_SOCKADDR_STORAGE)
fi

AC_CACHE_CHECK([for struct sockaddr_in6], ac_cv_have_struct_sockaddr_in6, [
	AC_TRY_COMPILE(
		[
#include <netinet/in.h>
		],
		[ struct sockaddr_in6 s; s.sin6_family = 0; ],
		[ ac_cv_have_struct_sockaddr_in6="yes" ],
		[ ac_cv_have_struct_sockaddr_in6="no" ]
	)
])
if test "x$ac_cv_have_struct_sockaddr_in6" = "xyes" ; then
	AC_DEFINE(HAVE_STRUCT_SOCKADDR_IN6)
fi

AC_CACHE_CHECK([for struct in6_addr], ac_cv_have_struct_in6_addr, [
	AC_TRY_COMPILE(
		[
#include <netinet/in.h>
		],
		[ struct in6_addr s; s.s6_addr[0] = 0; ],
		[ ac_cv_have_struct_in6_addr="yes" ],
		[ ac_cv_have_struct_in6_addr="no" ]
	)
])
if test "x$ac_cv_have_struct_in6_addr" = "xyes" ; then
	AC_DEFINE(HAVE_STRUCT_IN6_ADDR)
fi

AC_CACHE_CHECK([for struct addrinfo], ac_cv_have_struct_addrinfo, [
	AC_TRY_COMPILE(
		[
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
		],
		[ struct addrinfo s; s.ai_flags = AI_PASSIVE; ],
		[ ac_cv_have_struct_addrinfo="yes" ],
		[ ac_cv_have_struct_addrinfo="no" ]
	)
])
if test "x$ac_cv_have_struct_addrinfo" = "xyes" ; then
	AC_DEFINE(HAVE_STRUCT_ADDRINFO)
fi


# Checks for structure members

OSSH_CHECK_HEADER_FOR_FIELD(ut_host, utmp.h, HAVE_HOST_IN_UTMP)
OSSH_CHECK_HEADER_FOR_FIELD(ut_host, utmpx.h, HAVE_HOST_IN_UTMPX)
OSSH_CHECK_HEADER_FOR_FIELD(syslen, utmpx.h, HAVE_SYSLEN_IN_UTMPX)
OSSH_CHECK_HEADER_FOR_FIELD(ut_pid, utmp.h, HAVE_PID_IN_UTMP)
OSSH_CHECK_HEADER_FOR_FIELD(ut_type, utmp.h, HAVE_TYPE_IN_UTMP)
OSSH_CHECK_HEADER_FOR_FIELD(ut_type, utmpx.h, HAVE_TYPE_IN_UTMPX)
OSSH_CHECK_HEADER_FOR_FIELD(ut_tv, utmp.h, HAVE_TV_IN_UTMP)
OSSH_CHECK_HEADER_FOR_FIELD(ut_id, utmp.h, HAVE_ID_IN_UTMP)
OSSH_CHECK_HEADER_FOR_FIELD(ut_addr, utmp.h, HAVE_ADDR_IN_UTMP)
OSSH_CHECK_HEADER_FOR_FIELD(ut_addr, utmpx.h, HAVE_ADDR_IN_UTMPX)
OSSH_CHECK_HEADER_FOR_FIELD(ut_addr_v6, utmp.h, HAVE_ADDR_V6_IN_UTMP)
OSSH_CHECK_HEADER_FOR_FIELD(ut_addr_v6, utmpx.h, HAVE_ADDR_V6_IN_UTMPX)
OSSH_CHECK_HEADER_FOR_FIELD(ut_exit, utmp.h, HAVE_EXIT_IN_UTMP)
OSSH_CHECK_HEADER_FOR_FIELD(ut_time, utmp.h, HAVE_TIME_IN_UTMP)
OSSH_CHECK_HEADER_FOR_FIELD(ut_time, utmpx.h, HAVE_TIME_IN_UTMPX)
OSSH_CHECK_HEADER_FOR_FIELD(ut_tv, utmpx.h, HAVE_TV_IN_UTMPX)



AC_CACHE_CHECK([for ss_family field in struct sockaddr_storage],
		ac_cv_have_ss_family_in_struct_ss, [
	AC_TRY_COMPILE(
		[
#include <sys/types.h>
#include <sys/socket.h>
		],
		[ struct sockaddr_storage s; s.ss_family = 1; ],
		[ ac_cv_have_ss_family_in_struct_ss="yes" ],
		[ ac_cv_have_ss_family_in_struct_ss="no" ],
	)
])
if test "x$ac_cv_have_ss_family_in_struct_ss" = "xyes" ; then
	AC_DEFINE(HAVE_SS_FAMILY_IN_SS)
fi


AC_CACHE_CHECK([for __ss_family field in struct sockaddr_storage],
		ac_cv_have___ss_family_in_struct_ss, [
	AC_TRY_COMPILE(
		[
#include <sys/types.h>
#include <sys/socket.h>
		],
		[ struct sockaddr_storage s; s.__ss_family = 1; ],
		[ ac_cv_have___ss_family_in_struct_ss="yes" ],
		[ ac_cv_have___ss_family_in_struct_ss="no" ]
	)
])
if test "x$ac_cv_have___ss_family_in_struct_ss" = "xyes" ; then
	AC_DEFINE(HAVE___SS_FAMILY_IN_SS)
fi


AC_CACHE_CHECK([if libc defines __progname], ac_cv_libc_defines___progname, [
	AC_TRY_LINK([], 
		[ extern char *__progname; printf("%s", __progname); ], 
		[ ac_cv_libc_defines___progname="yes" ],
		[ ac_cv_libc_defines___progname="no" ]
	)
])
if test "x$ac_cv_libc_defines___progname" = "xyes" ; then
	AC_DEFINE(HAVE___PROGNAME)
fi


# Looking for programs, paths and files
AC_ARG_WITH(rsh,
	[  --with-rsh=PATH         Specify path to remote shell program ],
	[
		if test "x$withval" != "$no" ; then
			AC_DEFINE_UNQUOTED(RSH_PATH, "$withval")
		fi
	],
	[
		AC_PATH_PROG(rsh_path, rsh)
	]
)

AC_ARG_WITH(xauth,
	[  --with-xauth=PATH       Specify path to xauth program ],
	[
		if test "x$withval" != "$xno" ; then
			AC_DEFINE_UNQUOTED(XAUTH_PATH, "$withval")
		fi
	],
	[
		AC_PATH_PROG(xauth_path, xauth)
		if test ! -z "$xauth_path" -a -x "/usr/openwin/bin/xauth" ; then
			xauth_path="/usr/openwin/bin/xauth"
		fi
	]
)

if test ! -z "$xauth_path" ; then
	AC_DEFINE_UNQUOTED(XAUTH_PATH, "$xauth_path")
fi
if test ! -z "$rsh_path" ; then
	AC_DEFINE_UNQUOTED(RSH_PATH, "$rsh_path")
fi

# Check for mail directory (last resort if we cannot get it from headers)
if test ! -z "$MAIL" ; then
	maildir=`dirname $MAIL`
	AC_DEFINE_UNQUOTED(MAIL_DIRECTORY, "$maildir")
fi

if test -z "$no_dev_ptmx" ; then
	AC_CHECK_FILE("/dev/ptmx", 
		[
			AC_DEFINE_UNQUOTED(HAVE_DEV_PTMX)
			have_dev_ptmx=1
		]
	)
fi
AC_CHECK_FILE("/dev/ptc", 
	[
		AC_DEFINE_UNQUOTED(HAVE_DEV_PTS_AND_PTC)
		have_dev_ptc=1
	]
)

# Options from here on. Some of these are preset by platform above

# Check for user-specified random device, otherwise check /dev/urandom
AC_ARG_WITH(random,
	[  --with-random=FILE      read randomness from FILE (default=/dev/urandom)],
	[
		if test "x$withval" != "xno" ; then
			RANDOM_POOL="$withval";
			AC_DEFINE_UNQUOTED(RANDOM_POOL, "$RANDOM_POOL")
		fi
	],
	[
		# Check for random device
		AC_CHECK_FILE("/dev/urandom",
			[
				RANDOM_POOL="/dev/urandom"; 
				AC_SUBST(RANDOM_POOL)
				AC_DEFINE_UNQUOTED(RANDOM_POOL, "$RANDOM_POOL")
			]
		)
	]
)

# Check for EGD pool file
AC_ARG_WITH(egd-pool,
	[  --with-egd-pool=FILE    read randomness from EGD pool FILE (default none)],
	[
		if test "x$withval" != "xno" ; then
			EGD_SOCKET="$withval";
			AC_DEFINE_UNQUOTED(EGD_SOCKET, "$EGD_SOCKET")
		fi
	]
)

# detect pathnames for entropy gathering commands, if we need them
INSTALL_SSH_PRNG_CMDS=""
rm -f prng_commands
if test -z "$RANDOM_POOL" -a -z "$EGD_SOCKET" ; then
	# Use these commands to collect entropy
	OSSH_PATH_ENTROPY_PROG(PROG_LS, ls)
	OSSH_PATH_ENTROPY_PROG(PROG_NETSTAT, netstat)
	OSSH_PATH_ENTROPY_PROG(PROG_ARP, arp)
	OSSH_PATH_ENTROPY_PROG(PROG_IFCONFIG, ifconfig)
	OSSH_PATH_ENTROPY_PROG(PROG_PS, ps)
	OSSH_PATH_ENTROPY_PROG(PROG_W, w)
	OSSH_PATH_ENTROPY_PROG(PROG_WHO, who)
	OSSH_PATH_ENTROPY_PROG(PROG_LAST, last)
	OSSH_PATH_ENTROPY_PROG(PROG_LASTLOG, lastlog)
	OSSH_PATH_ENTROPY_PROG(PROG_DF, df)
	OSSH_PATH_ENTROPY_PROG(PROG_VMSTAT, vmstat)
	OSSH_PATH_ENTROPY_PROG(PROG_UPTIME, uptime)
	OSSH_PATH_ENTROPY_PROG(PROG_IPCS, ipcs)
	OSSH_PATH_ENTROPY_PROG(PROG_TAIL, tail)
	OSSH_PATH_ENTROPY_PROG(PROG_LS, ls)

	INSTALL_SSH_PRNG_CMDS="yes"
fi
AC_SUBST(INSTALL_SSH_PRNG_CMDS)


AC_ARG_WITH(catman,
	[  --with-catman=man|cat   Install preformatted manpages[no]],
	[
		MANTYPE='$(CATMAN)'
		if test x"$withval" != x"yes" ; then
		   mansubdir=$withval
		else
		   mansubdir=cat
		fi
	], [
		if test -z "$MANTYPE" ; then
			MANTYPE='$(TROFFMAN)'
			mansubdir=man
		fi
	]
)
AC_SUBST(MANTYPE)
AC_SUBST(mansubdir)

# Check whether user wants Kerberos support
AC_ARG_WITH(kerberos4,
	[  --with-kerberos4=PATH   Enable Kerberos 4 support],
	[
		if test "x$withval" != "xno" ; then
	
			if test "x$withval" != "$xyes" ; then
				CFLAGS="$CFLAGS -I${withval}/include"
				LDFLAGS="$LDFLAGS -L${withval}/lib"
				if test ! -z "$need_dash_r" ; then
					LDFLAGS="$LDFLAGS -R${withval}/lib"
				fi
				if test ! -z "$blibpath" ; then
					blibpath="$blibpath:${withval}/lib"
				fi
			else
				if test -d /usr/include/kerberosIV ; then
					CFLAGS="$CFLAGS -I/usr/include/kerberosIV"
				fi
			fi

			AC_CHECK_HEADERS(krb.h)
			AC_CHECK_LIB(krb, main)
			if test "$ac_cv_header_krb_h" != yes; then
				AC_MSG_WARN([Cannot find krb.h, build may fail])
			fi
			if test "$ac_cv_lib_krb_main" != yes; then
				AC_MSG_WARN([Cannot find libkrb, build may fail])
			fi

			KLIBS="-lkrb -ldes"
			AC_CHECK_LIB(resolv, dn_expand, , )
			KRB4=yes
			AC_DEFINE(KRB4)
		fi
	]
)

# Check whether user wants AFS support
AC_ARG_WITH(afs,
	[  --with-afs=PATH         Enable AFS support],
	[
		if test "x$withval" != "xno" ; then

			if test "x$withval" != "$xyes" ; then
				CFLAGS="$CFLAGS -I${withval}/include"
				LFLAGS="$LFLAGS -L${withval}/lib"
			fi

			if test -z "$KRB4" ; then
				AC_MSG_WARN([AFS requires Kerberos IV support, build may fail])
			fi

			LIBS="$LIBS -lkafs"
			if test ! -z "$AFS_LIBS" ; then
				LIBS="$LIBS $AFS_LIBS"
			fi
			AC_DEFINE(AFS)
		fi
	]
)
LIBS="$LIBS $KLIBS"

# Check whether user wants S/Key support
AC_ARG_WITH(skey,
	[  --with-skey             Enable S/Key support],
	[
		if test "x$withval" != "xno" ; then
			AC_DEFINE(SKEY)
			LIBS="$LIBS -lskey"
		fi
	]
)

# Check whether user wants TCP wrappers support
AC_ARG_WITH(tcp-wrappers,
	[  --with-tcp-wrappers     Enable tcpwrappers support],
	[
		if test "x$withval" != "xno" ; then
			saved_LIBS="$LIBS"
			LIBS="$LIBS -lwrap"
			AC_MSG_CHECKING(for libwrap)
			AC_TRY_LINK(
				[
#include <tcpd.h>
					int deny_severity = 0, allow_severity = 0;
				],
				[hosts_access(0);],
				[
					AC_MSG_RESULT(yes)
					AC_DEFINE(LIBWRAP)
				],
				[
					AC_MSG_RESULT(no)
					AC_MSG_WARN([*** libwrap missing - tcpwrapper support disabled ***])
					LIBS="$saved_LIBS"
				]
			)
		fi
	]
)

# Check whether to enable MD5 passwords
AC_ARG_WITH(md5-passwords,
	[  --with-md5-passwords    Enable use of MD5 passwords],
	[
		if test "x$withval" != "xno" ; then
			AC_DEFINE(HAVE_MD5_PASSWORDS)
		fi
	]
)

# Whether to disable shadow password support
AC_ARG_WITH(shadow,
	[  --without-shadow        Disable shadow password support],
	[
		if test "x$withval" = "xno" ; then	
			AC_DEFINE(DISABLE_SHADOW)
		fi
	]
)

# Use ip address instead of hostname in $DISPLAY
AC_ARG_WITH(ipaddr-display,
	[  --with-ipaddr-display   Use ip address instead of hostname in \$DISPLAY],
	[
		if test "x$withval" = "xno" ; then	
			AC_DEFINE(IPADDR_IN_DISPLAY)
		fi
	]
)

# Whether to mess with the default path
AC_ARG_WITH(default-path,
	[  --with-default-path=PATH Specify default \$PATH environment for server],
	[
		if test "x$withval" != "xno" ; then	
			AC_DEFINE_UNQUOTED(USER_PATH, "$withval")
		fi
	]
)

# Whether to force IPv4 by default (needed on broken glibc Linux)
AC_ARG_WITH(ipv4-default,
	[  --with-ipv4-default     Use IPv4 by connections unless '-6' specified],
	[
		if test "x$withval" != "xno" ; then	
			AC_DEFINE(IPV4_DEFAULT)
		fi
	]
)

AC_MSG_CHECKING([if we need to convert IPv4 in IPv6-mapped addresses])
AC_ARG_WITH(4in6,
	[  --with-4in6             Check for and convert IPv4 in IPv6 mapped addresses],
	[
		if test "x$withval" != "xno" ; then
			AC_MSG_RESULT(yes)
			AC_DEFINE(IPV4_IN_IPV6)
		else
			AC_MSG_RESULT(no)
		fi
	],[
		if test "x$inet6_default_4in6" = "xyes"; then
			AC_MSG_RESULT([yes (default)])
			AC_DEFINE(IPV4_IN_IPV6)
		else
			AC_MSG_RESULT([no (default)])
		fi
	]
)

# Where to place sshd.pid
piddir=/var/run
AC_ARG_WITH(pid-dir,
	[  --with-pid-dir=PATH     Specify location of ssh.pid file],
	[
		if test "x$withval" != "xno" ; then	
			piddir=$withval
		fi
	]
)

AC_DEFINE_UNQUOTED(PIDDIR, "$piddir")
AC_SUBST(piddir)

dnl allow user to disable some login recording features
AC_ARG_ENABLE(lastlog,
	[ --disable-lastlog        disable use of lastlog even if detected [no]],
	[ AC_DEFINE(DISABLE_LASTLOG) ]
)
AC_ARG_ENABLE(utmp,
	[ --disable-utmp           disable use of utmp even if detected [no]],
	[ AC_DEFINE(DISABLE_UTMP) ]
)
AC_ARG_ENABLE(utmpx,
	[ --disable-utmpx          disable use of utmpx even if detected [no]],
	[ AC_DEFINE(DISABLE_UTMPX) ]
)
AC_ARG_ENABLE(wtmp,
	[ --disable-wtmp           disable use of wtmp even if detected [no]],
	[ AC_DEFINE(DISABLE_WTMP) ]
)
AC_ARG_ENABLE(wtmpx,
	[ --disable-wtmpx          disable use of wtmpx even if detected [no]],
	[ AC_DEFINE(DISABLE_WTMPX) ]
)
AC_ARG_ENABLE(libutil,
	[ --disable-libutil        disable use of libutil (login() etc.) [no]],
	[ AC_DEFINE(DISABLE_LOGIN) ]
)
AC_ARG_ENABLE(pututline,
	[ --disable-pututline      disable use of pututline() etc. ([uw]tmp) [no]],
	[ AC_DEFINE(DISABLE_PUTUTLINE) ]
)
AC_ARG_ENABLE(pututxline,
	[ --disable-pututxline      disable use of pututxline() etc. ([uw]tmpx) [no]],
	[ AC_DEFINE(DISABLE_PUTUTXLINE) ]
)
AC_ARG_WITH(lastlog,
  [ --with-lastlog=FILE|DIR  specify lastlog location [common locations]],
  [ conf_lastlog_location="$withval";  ],)

dnl lastlog, [uw]tmpx? detection
dnl  NOTE: set the paths in the platform section to avoid the
dnl   need for command-line parameters
dnl lastlog and [uw]tmp are subject to a file search if all else fails

dnl lastlog detection
dnl  NOTE: the code itself will detect if lastlog is a directory
AC_MSG_CHECKING([if your system defines LASTLOG_FILE])
AC_TRY_COMPILE([
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_LASTLOG_H
#  include <lastlog.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
	],
	[ char *lastlog = LASTLOG_FILE; ],
	[ AC_MSG_RESULT(yes) ],
	[
		AC_MSG_RESULT(no)
		AC_MSG_CHECKING([if your system defines _PATH_LASTLOG])
		AC_TRY_COMPILE([
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_LASTLOG_H
#  include <lastlog.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
		],
		[ char *lastlog = _PATH_LASTLOG; ],
		[ AC_MSG_RESULT(yes) ],
		[
			AC_MSG_RESULT(no)
			system_lastlog_path=no
		])
	]
)

if test -z "$conf_lastlog_location"; then
	if test x"$system_lastlog_path" = x"no" ; then
		for f in /var/log/lastlog /usr/adm/lastlog /var/adm/lastlog /etc/security/lastlog ; do
				if test -d "$f" -o -f "$f" ; then
					conf_lastlog_location=$f
				fi
		done
		if test -z "$conf_lastlog_location"; then
			AC_MSG_WARN([** Cannot find lastlog **])
			dnl Don't define DISABLE_LASTLOG - that means we don't try wtmp/wtmpx
		fi
	fi
fi

if test -n "$conf_lastlog_location"; then
	AC_DEFINE_UNQUOTED(CONF_LASTLOG_FILE, "$conf_lastlog_location")
fi	

dnl utmp detection
AC_MSG_CHECKING([if your system defines UTMP_FILE])
AC_TRY_COMPILE([
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
	],
	[ char *utmp = UTMP_FILE; ],
	[ AC_MSG_RESULT(yes) ],
	[ AC_MSG_RESULT(no)
	  system_utmp_path=no ]
)
if test -z "$conf_utmp_location"; then
	if test x"$system_utmp_path" = x"no" ; then
		for f in /etc/utmp /usr/adm/utmp /var/run/utmp; do
			if test -f $f ; then
				conf_utmp_location=$f
			fi
		done
		if test -z "$conf_utmp_location"; then
			AC_DEFINE(DISABLE_UTMP)
		fi
	fi
fi
if test -n "$conf_utmp_location"; then
	AC_DEFINE_UNQUOTED(CONF_UTMP_FILE, "$conf_utmp_location")
fi	

dnl wtmp detection
AC_MSG_CHECKING([if your system defines WTMP_FILE])
AC_TRY_COMPILE([
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
	],
	[ char *wtmp = WTMP_FILE; ],
	[ AC_MSG_RESULT(yes) ],
	[ AC_MSG_RESULT(no)
	  system_wtmp_path=no ]
)
if test -z "$conf_wtmp_location"; then
	if test x"$system_wtmp_path" = x"no" ; then
		for f in /usr/adm/wtmp /var/log/wtmp; do
			if test -f $f ; then
				conf_wtmp_location=$f
			fi
		done
		if test -z "$conf_wtmp_location"; then
			AC_DEFINE(DISABLE_WTMP)
		fi
	fi
fi
if test -n "$conf_wtmp_location"; then
	AC_DEFINE_UNQUOTED(CONF_WTMP_FILE, "$conf_wtmp_location")
fi	


dnl utmpx detection - I don't know any system so perverse as to require
dnl  utmpx, but not define UTMPX_FILE (ditto wtmpx.) No doubt it's out
dnl  there, though.
AC_MSG_CHECKING([if your system defines UTMPX_FILE])
AC_TRY_COMPILE([
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_UTMPX_H
#include <utmpx.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
	],
	[ char *utmpx = UTMPX_FILE; ],
	[ AC_MSG_RESULT(yes) ],
	[ AC_MSG_RESULT(no)
	  system_utmpx_path=no ]
)
if test -z "$conf_utmpx_location"; then
	if test x"$system_utmpx_path" = x"no" ; then
		AC_DEFINE(DISABLE_UTMPX)
	fi
else
	AC_DEFINE_UNQUOTED(CONF_UTMPX_FILE, "$conf_utmpx_location")
fi	

dnl wtmpx detection
AC_MSG_CHECKING([if your system defines WTMPX_FILE])
AC_TRY_COMPILE([
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_UTMPX_H
#include <utmpx.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
	],
	[ char *wtmpx = WTMPX_FILE; ],
	[ AC_MSG_RESULT(yes) ],
	[ AC_MSG_RESULT(no)
	  system_wtmpx_path=no ]
)
if test -z "$conf_wtmpx_location"; then
	if test x"$system_wtmpx_path" = x"no" ; then
		AC_DEFINE(DISABLE_WTMPX)
	fi
else
	AC_DEFINE_UNQUOTED(CONF_WTMPX_FILE, "$conf_wtmpx_location")
fi	


# Change default command timeout for builtin PRNG
entropy_timeout=200
AC_ARG_WITH(entropy-timeout,
	[  --with-entropy-timeout  Specify entropy gathering command timeout (msec)],
	[
		if test "x$withval" != "xno" ; then
			entropy_timeout=$withval
		fi
	]	
)
AC_DEFINE_UNQUOTED(ENTROPY_TIMEOUT_MSEC, $entropy_timeout)


if test ! -z "$blibpath" ; then
	LDFLAGS="$LDFLAGS -blibpath:$blibpath"
	AC_MSG_WARN([Please check and edit -blibpath in LDFLAGS in Makefile])
fi

AC_OUTPUT(Makefile ssh_prng_cmds)