summaryrefslogtreecommitdiff
path: root/configure.ac
blob: bcb6e4ac2100ef7585b8c1605ade9b51ef5f178e (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
#                                               -*- Autoconf -*-
# Process this file with autoconf and autoheader to produce a configure script.

# This Autoconf file was cobbled from various locations. In particular, a bunch
# of the platform checks have been taken straight from OpenSSH's configure.ac
# Huge thanks to them for dealing with the horrible platform-specifics :)

AC_PREREQ(2.59)
AC_INIT
AC_CONFIG_SRCDIR(buffer.c)

# Record which revision is being built
if test -s "`which hg`" && test -d "$srcdir/.hg"; then
	hgrev=`hg id -i -R "$srcdir"`
	AC_MSG_NOTICE([Source directory Mercurial base revision $hgrev])
fi

ORIGCFLAGS="$CFLAGS"
# Checks for programs.
AC_PROG_CC

if test -z "$LD" ; then
	LD=$CC
fi
AC_SUBST(LD)	

AC_DEFUN(DB_TRYADDCFLAGS, 
[{
		OLDFLAGS="$CFLAGS"
		TESTFLAGS="$1"
		CFLAGS="$CFLAGS $TESTFLAGS"
		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], 
			[AC_MSG_NOTICE([Setting $TESTFLAGS])], 
			[AC_MSG_NOTICE([Not setting $TESTFLAGS]); CFLAGS="$OLDFLAGS" ]
			)
}])

# set compile flags prior to other tests
if test -z "$ORIGCFLAGS" && test "$GCC" = "yes"; then
	AC_MSG_NOTICE(No \$CFLAGS set... using "-Os -W -Wall" for GCC)
	CFLAGS="-Os -W -Wall"
fi

AC_MSG_NOTICE([Checking if compiler '$CC' supports -Wno-pointer-sign])
DB_TRYADDCFLAGS([-Wno-pointer-sign])

AC_MSG_NOTICE([Checking if compiler '$CC' supports -fno-strict-overflow])
DB_TRYADDCFLAGS([-fno-strict-overflow])

STATIC=0
AC_ARG_ENABLE(static,
	[  --enable-static         Build static binaries],
	[
		if test "x$enableval" = "xyes"; then
			STATIC=1
			AC_MSG_NOTICE(Static Build)
		fi
	], [])
AC_SUBST(STATIC)

hardenbuild=1
AC_ARG_ENABLE(harden,
	[  --disable-harden        Don't set hardened build flags],
	[
		if test "x$enableval" = "xno"; then
			hardenbuild=0
			AC_MSG_NOTICE(Disabling hardened build flags)
		fi
	], [])

if test "$hardenbuild" -eq 1; then
	AC_MSG_NOTICE(Checking for available hardened build flags:)
	# relocation flags don't make sense for static builds
	if test "$STATIC" -ne 1; then
		# pie
		DB_TRYADDCFLAGS([-fPIE])

		OLDLDFLAGS="$LDFLAGS"
		TESTFLAGS="-Wl,-pie"
		LDFLAGS="$LDFLAGS $TESTFLAGS"
		AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 
			[AC_MSG_NOTICE([Setting $TESTFLAGS])], 
			[
				LDFLAGS="$OLDLDFLAGS"
				TESTFLAGS="-pie"
				LDFLAGS="$LDFLAGS $TESTFLAGS"
				AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 
					[AC_MSG_NOTICE([Setting $TESTFLAGS])], 
					[AC_MSG_NOTICE([Not setting $TESTFLAGS]); LDFLAGS="$OLDLDFLAGS" ]
					)
			]
			)
		# readonly elf relocation sections (relro)
		OLDLDFLAGS="$LDFLAGS"
		TESTFLAGS="-Wl,-z,now -Wl,-z,relro"
		LDFLAGS="$LDFLAGS $TESTFLAGS"
		AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 
			[AC_MSG_NOTICE([Setting $TESTFLAGS])], 
			[AC_MSG_NOTICE([Not setting $TESTFLAGS]); LDFLAGS="$OLDLDFLAGS" ]
			)
	fi # non-static
	# stack protector. -strong is good but only in gcc 4.9 or later
	OLDCFLAGS="$CFLAGS"
	TESTFLAGS="-fstack-protector-strong"
	CFLAGS="$CFLAGS $TESTFLAGS"
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], 
	    [AC_MSG_NOTICE([Setting $TESTFLAGS])], 
	    [
			CFLAGS="$OLDCFLAGS"
			TESTFLAGS="-fstack-protector --param=ssp-buffer-size=4"
			CFLAGS="$CFLAGS $TESTFLAGS"
			AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], 
			    [AC_MSG_NOTICE([Setting $TESTFLAGS])], 
			    [AC_MSG_NOTICE([Not setting $TESTFLAGS]); CFLAGS="$OLDCFLAGS" ]
			    )
	    ]
	    )
	# FORTIFY_SOURCE
	DB_TRYADDCFLAGS([-D_FORTIFY_SOURCE=2])

	# Spectre v2 mitigations
	DB_TRYADDCFLAGS([-mfunction-return=thunk])
	DB_TRYADDCFLAGS([-mindirect-branch=thunk])

fi

# large file support is useful for scp
AC_SYS_LARGEFILE

# Host specific options
# this isn't a definitive list of hosts, they are just added as required
AC_CANONICAL_HOST

case "$host" in

*-*-linux*)
	no_ptmx_check=1
	;;

*-*-solaris*)
	CFLAGS="$CFLAGS -I/usr/local/include"
	LDFLAGS="$LDFLAGS -L/usr/local/lib -R/usr/local/lib"
	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,1,Disable utmp)
		AC_DEFINE(DISABLE_WTMP,1,Disable wtmp)
	else
		AC_MSG_RESULT(no)
	fi
	AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
	AC_CHECK_LIB(nsl, yp_match, LIBS="$LIBS -lnsl")
	;;

*-*-aix*)
	AC_DEFINE(AIX,1,Using AIX)
	# OpenSSH thinks it's broken. If it isn't, let me know.
	AC_DEFINE(BROKEN_GETADDRINFO,1,Broken getaddrinfo)
	;;
	
*-*-hpux*)
	LIBS="$LIBS -lsec"
	# It's probably broken.
	AC_DEFINE(BROKEN_GETADDRINFO,1,Broken getaddrinfo)
	;;
*-dec-osf*)
	AC_DEFINE(BROKEN_GETADDRINFO,1,Broken getaddrinfo)
	;;
esac

AC_CHECK_TOOL(AR, ar, :)
AC_CHECK_TOOL(RANLIB, ranlib, :)
AC_CHECK_TOOL(STRIP, strip, :)
AC_CHECK_TOOL(INSTALL, install, :)

dnl Can't use login() or logout() with uclibc
AC_CHECK_DECL(__UCLIBC__, 
	[
	no_loginfunc_check=1
	AC_MSG_NOTICE([Using uClibc - login() and logout() probably don't work, so we won't use them.])
	],,)

dnl We test for crypt() specially. On Linux (and others?) it resides in libcrypt
dnl but we don't want link all binaries to -lcrypt, just dropbear server.
dnl OS X doesn't need -lcrypt 
AC_CHECK_FUNC(crypt, found_crypt_func=here)
AC_CHECK_LIB(crypt, crypt, 
	[
	CRYPTLIB="-lcrypt"
	found_crypt_func=here
	])
AC_SUBST(CRYPTLIB)	
if test "t$found_crypt_func" = there; then
AC_DEFINE(HAVE_CRYPT, 1, [crypt() function])
fi

# Check if zlib is needed
AC_ARG_WITH(zlib,
	[  --with-zlib=PATH        Use zlib in PATH],
	[
		# option is given
		if test -d "$withval/lib"; then
			LDFLAGS="-L${withval}/lib ${LDFLAGS}"
		else
			LDFLAGS="-L${withval} ${LDFLAGS}"
		fi
		if test -d "$withval/include"; then
			CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
		else
			CPPFLAGS="-I${withval} ${CPPFLAGS}"
		fi
	]
)

AC_ARG_ENABLE(zlib,
	[  --disable-zlib          Don't include zlib support],
	[
		if test "x$enableval" = "xno"; then
			AC_DEFINE(DISABLE_ZLIB,1,Use zlib)
			AC_MSG_NOTICE(Disabling zlib)
		else
			AC_CHECK_LIB(z, deflate, , AC_MSG_ERROR([*** zlib missing - install first or check config.log ***]))
			AC_MSG_NOTICE(Enabling zlib)
		fi
	],
	[
		# if not disabled, check for zlib
		AC_CHECK_LIB(z, deflate, , AC_MSG_ERROR([*** zlib missing - install first or check config.log ***]))
		AC_MSG_NOTICE(Enabling zlib)
	]
)

# Check if pam is needed
AC_ARG_WITH(pam,
	[  --with-pam=PATH        Use pam in PATH],
	[
		# option is given
		if test -d "$withval/lib"; then
			LDFLAGS="-L${withval}/lib ${LDFLAGS}"
		else
			LDFLAGS="-L${withval} ${LDFLAGS}"
		fi
		if test -d "$withval/include"; then
			CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
		else
			CPPFLAGS="-I${withval} ${CPPFLAGS}"
		fi
	]
)


AC_ARG_ENABLE(pam,
	[  --enable-pam            Try to include PAM support],
	[
		if test "x$enableval" = "xyes"; then
			AC_CHECK_LIB(pam, pam_authenticate, , AC_MSG_ERROR([*** PAM missing - install first or check config.log ***]))
			AC_MSG_NOTICE(Enabling PAM)
			AC_CHECK_FUNCS(pam_fail_delay)
		else
			AC_DEFINE(DISABLE_PAM,1,Use PAM)
			AC_MSG_NOTICE(Disabling PAM)
		fi
	],
	[
		# disable it by default
		AC_DEFINE(DISABLE_PAM,1,Use PAM)
		AC_MSG_NOTICE(Disabling PAM)
	]
)

AC_ARG_ENABLE(openpty,
	[  --disable-openpty       Don't use openpty, use alternative method],
	[
		if test "x$enableval" = "xno"; then
			AC_MSG_NOTICE(Not using openpty)
		else
			AC_MSG_NOTICE(Using openpty if available)
			AC_SEARCH_LIBS(openpty, util, [dropbear_cv_func_have_openpty=yes])
		fi
	],
	[
		AC_MSG_NOTICE(Using openpty if available)
		AC_SEARCH_LIBS(openpty, util, [dropbear_cv_func_have_openpty=yes])
	]
)

if test "x$dropbear_cv_func_have_openpty" = "xyes"; then
	AC_DEFINE(HAVE_OPENPTY,,Have openpty() function)
	no_ptc_check=yes
	no_ptmx_check=yes
fi

AC_ARG_ENABLE(syslog,
	[  --disable-syslog        Don't include syslog support],
	[
		if test "x$enableval" = "xno"; then
			AC_DEFINE(DISABLE_SYSLOG,1,Using syslog)
			AC_MSG_NOTICE(Disabling syslog)
		else
			AC_MSG_NOTICE(Enabling syslog)
		fi
	],
	[
		AC_MSG_NOTICE(Enabling syslog)
	]
)

AC_ARG_ENABLE(shadow,
	[  --disable-shadow        Don't use shadow passwords (if available)],
	[
		if test "x$enableval" = "xno"; then
			AC_MSG_NOTICE(Not using shadow passwords)
		else
			AC_CHECK_HEADERS([shadow.h])
			AC_MSG_NOTICE(Using shadow passwords if available)
		fi
	],
	[
		AC_CHECK_HEADERS([shadow.h])
		AC_MSG_NOTICE(Using shadow passwords if available)
	]
)

AC_ARG_ENABLE(plugin,
	[  --enable-plugin         Enable support for External Public Key Authentication plug-in],
	[
		AC_DEFINE(DROPBEAR_PLUGIN, 1, External Public Key Authentication)
		AC_MSG_NOTICE(Enabling support for External Public Key Authentication)
		DROPBEAR_PLUGIN=1
	],
	[
		AC_DEFINE(DROPBEAR_PLUGIN, 0, External Public Key Authentication)
		DROPBEAR_PLUGIN=0
	]

)
AC_SUBST(DROPBEAR_PLUGIN)

AC_ARG_ENABLE(fuzz,
	[  --enable-fuzz           Build fuzzing. Not recommended for deployment.],
	[
		if test "x$enableval" = "xyes"; then
            AC_DEFINE(DROPBEAR_FUZZ, 1, Fuzzing)
            AC_MSG_NOTICE(Enabling fuzzing)
            DROPBEAR_FUZZ=1
            # libfuzzer needs linking with c++ libraries
            AC_PROG_CXX
        else
            AC_DEFINE(DROPBEAR_FUZZ, 0, Fuzzing)
            AC_MSG_NOTICE(Disabling fuzzing)
            DROPBEAR_FUZZ=0
        fi
	],
	[
		AC_DEFINE(DROPBEAR_FUZZ, 0, Fuzzing)
		AC_MSG_NOTICE(Disabling fuzzing)
		DROPBEAR_FUZZ=0
	]

)
AC_SUBST(DROPBEAR_FUZZ)
AC_SUBST(CXX)

# Checks for header files.
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([netinet/in.h netinet/tcp.h \
	crypt.h \
	pty.h libutil.h libgen.h inttypes.h stropts.h utmp.h \
	utmpx.h lastlog.h paths.h util.h netdb.h security/pam_appl.h \
	pam/pam_appl.h netinet/in_systm.h sys/uio.h linux/pkt_sched.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_UID_T
AC_TYPE_MODE_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_HEADER_TIME

AC_CHECK_TYPES([uint8_t, u_int8_t, uint16_t, u_int16_t, uint32_t, u_int32_t])
AC_CHECK_TYPES([struct sockaddr_storage])
AC_CHECK_TYPE([socklen_t], ,[
	AC_MSG_CHECKING([for socklen_t equivalent])
	AC_CACHE_VAL([curl_cv_socklen_t_equiv],
	[
	# Systems have either "struct sockaddr *" or
	# "void *" as the second argument to getpeername
	curl_cv_socklen_t_equiv=
	for arg2 in "struct sockaddr" void; do
		for t in int size_t unsigned long "unsigned long"; do
		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>

			int getpeername (int, $arg2 *, $t *);
		]],[[
			$t len;
			getpeername(0,0,&len);
		]])],[
			curl_cv_socklen_t_equiv="$t"
			break
		])
		done
	done

	if test "x$curl_cv_socklen_t_equiv" = x; then
		AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
	fi
	])
	AC_MSG_RESULT($curl_cv_socklen_t_equiv)
	AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv,
			[type to use in place of socklen_t if not defined])],
	[#include <sys/types.h>
	#include <sys/socket.h>])

# for the fake-rfc2553 stuff - straight from OpenSSH

AC_CACHE_CHECK([for struct sockaddr_storage], ac_cv_have_struct_sockaddr_storage, [
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>
		]],
		[[ if (sizeof(struct sockaddr_storage)) return 0 ]])],
		[ 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_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <netinet/in.h>
		]],
		[[ if (sizeof(struct sockaddr_in6)) return 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_IN6,1,Have struct sockaddr_in6)
fi

AC_CACHE_CHECK([for struct in6_addr], ac_cv_have_struct_in6_addr, [
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <netinet/in.h>
		]],
		[[ if (sizeof(struct in6_addr)) return 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,1,Have struct in6_addr)
fi

AC_CACHE_CHECK([for struct addrinfo], ac_cv_have_struct_addrinfo, [
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
		]],
		[[ if (sizeof(struct addrinfo)) return 0 ]])],
		[ 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,1,Have struct addrinfo)
fi


# IRIX has a const char return value for gai_strerror()
AC_CHECK_FUNCS(gai_strerror,[
	AC_DEFINE(HAVE_GAI_STRERROR)
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>

const char *gai_strerror(int);]],[[
char *str;

str = gai_strerror(0);]])],[
		AC_DEFINE(HAVE_CONST_GAI_STRERROR_PROTO, 1,
		[Define if gai_strerror() returns const char *])])])

# for loginrec.c

AC_CHECK_MEMBERS([struct utmp.ut_host, struct utmp.ut_pid, struct utmp.ut_type, struct utmp.ut_tv, struct utmp.ut_id, struct utmp.ut_addr, struct utmp.ut_addr_v6, struct utmp.ut_exit, struct utmp.ut_time],,,[
#include <sys/types.h>
#if HAVE_UTMP_H
#include <utmp.h>
#endif
])

AC_CHECK_MEMBERS([struct utmpx.ut_host, struct utmpx.ut_syslen, struct utmpx.ut_type, struct utmpx.ut_id, struct utmpx.ut_addr, struct utmpx.ut_addr_v6, struct utmpx.ut_time, struct utmpx.ut_tv],,,[
#include <sys/types.h>
#include <sys/socket.h>
#if HAVE_UTMPX_H
#include <utmpx.h>
#endif
])

AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],,,[
#include <sys/types.h>
#include <sys/socket.h>
])

AC_CHECK_FUNCS(endutent getutent getutid getutline pututline setutent)
AC_CHECK_FUNCS(utmpname)
AC_CHECK_FUNCS(endutxent getutxent getutxid getutxline pututxline )
AC_CHECK_FUNCS(setutxent utmpxname)
AC_CHECK_FUNCS(logout updwtmp logwtmp)

# POSIX monotonic time
AC_CHECK_FUNCS(clock_gettime)

# OS X monotonic time
AC_CHECK_HEADERS([mach/mach_time.h])
AC_CHECK_FUNCS(mach_absolute_time)

AC_CHECK_FUNCS(explicit_bzero memset_s)

AC_ARG_ENABLE(bundled-libtom,
[  --enable-bundled-libtom       Force using bundled libtomcrypt/libtommath even if a system version exists.
  --disable-bundled-libtom      Force using system libtomcrypt/libtommath, fail if it does not exist.
                                Default is to use system if available, otherwise bundled.
                                Dropbear requires system libtommath >= 1.2.0 and libtomcrypt >= 1.18.0],
	[
		if test "x$enableval" = "xyes"; then
			BUNDLED_LIBTOM=1
			AC_MSG_NOTICE(Forcing bundled libtom*)
		else
			BUNDLED_LIBTOM=0
			AC_CHECK_LIB(tommath, mp_to_ubin, LIBTOM_LIBS="-ltommath $LIBTOM_LIBS",
				[AC_MSG_ERROR([Missing/old system libtommath and --disable-bundled-libtom was specified])] )
			AC_CHECK_LIB(tomcrypt, poly1305_init, LIBTOM_LIBS="-ltomcrypt $LIBTOM_LIBS",
				[AC_MSG_ERROR([Missing/old system libtomcrypt and --disable-bundled-libtom was specified])] )
		fi
	],
	[
		BUNDLED_LIBTOM=0
		AC_CHECK_LIB(tommath, mp_to_ubin, LIBTOM_LIBS="-ltommath $LIBTOM_LIBS", BUNDLED_LIBTOM=1)
		AC_CHECK_LIB(tomcrypt, register_cipher, LIBTOM_LIBS="-ltomcrypt $LIBTOM_LIBS", BUNDLED_LIBTOM=1)
	]
)

if test $BUNDLED_LIBTOM = 1 ; then
	AC_DEFINE(BUNDLED_LIBTOM,1,Use bundled libtom) 
fi

AC_SUBST(LIBTOM_LIBS)
AC_SUBST(BUNDLED_LIBTOM)

dnl Added from OpenSSH 3.6.1p2's configure.ac

dnl allow user to disable some login recording features
AC_ARG_ENABLE(lastlog,
	[  --disable-lastlog       Disable use of lastlog even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_LASTLOG,1,Disable use of lastlog())
		fi
	]
)
AC_ARG_ENABLE(utmp,
	[  --disable-utmp          Disable use of utmp even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_UTMP,1,Disable use of utmp)
		fi
	]
)
AC_ARG_ENABLE(utmpx,
	[  --disable-utmpx         Disable use of utmpx even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_UTMPX,1,Disable use of utmpx)
		fi
	]
)
AC_ARG_ENABLE(wtmp,
	[  --disable-wtmp          Disable use of wtmp even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_WTMP,1,Disable use of wtmp)
		fi
	]
)
AC_ARG_ENABLE(wtmpx,
	[  --disable-wtmpx         Disable use of wtmpx even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_WTMPX,1,Disable use of wtmpx)
		fi
	]
)
AC_ARG_ENABLE(loginfunc,
	[  --disable-loginfunc     Disable use of login() etc. [no]],
	[ no_loginfunc_check=1
	AC_MSG_NOTICE([Not using login() etc]) ]
)
AC_ARG_ENABLE(pututline,
	[  --disable-pututline     Disable use of pututline() etc. ([uw]tmp) [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_PUTUTLINE,1,Disable use of pututline())
		fi
	]
)
AC_ARG_ENABLE(pututxline,
	[  --disable-pututxline    Disable use of pututxline() etc. ([uw]tmpx) [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_PUTUTXLINE,1,Disable use of pututxline())
		fi
	]
)
AC_ARG_WITH(lastlog,
  [  --with-lastlog=FILE|DIR specify lastlog location [common locations]],
	[
		if test "x$withval" = "xno" ; then	
			AC_DEFINE(DISABLE_LASTLOG)
		else
			conf_lastlog_location=$withval
		fi
	]
)

if test -z "$no_loginfunc_check"; then
	dnl    Checks for libutil functions (login(), logout() etc, not openpty() )
	AC_SEARCH_LIBS(login, util bsd, [AC_DEFINE(HAVE_LOGIN,1,[Have login() function])])
	AC_CHECK_FUNCS(logout updwtmp logwtmp)
fi

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_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_LASTLOG_H
#  include <lastlog.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
#ifdef HAVE_LOGIN_H
# include <login.h>
#endif
	]],
	[[ char *lastlog = LASTLOG_FILE; ]])],
	[ AC_MSG_RESULT(yes) ],
	[
		AC_MSG_RESULT(no)
		AC_MSG_CHECKING([if your system defines _PATH_LASTLOG])
		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#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 "$f" || test -f "$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", lastlog file location)
fi	

dnl utmp detection
AC_MSG_CHECKING([if your system defines UTMP_FILE])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#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", utmp file location)
fi	

dnl wtmp detection
AC_MSG_CHECKING([if your system defines WTMP_FILE])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#ifdef HAVE_UTMP_H
#  include <utmp.h>
#endif
#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", wtmp file 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_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#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", utmpx file location)
fi	

dnl wtmpx detection
AC_MSG_CHECKING([if your system defines WTMPX_FILE])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#ifdef HAVE_UTMP_H
#  include <utmp.h>
#endif
#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", wtmpx file location)
fi	

# Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MEMCMP
AC_FUNC_SELECT_ARGTYPES
AC_CHECK_FUNCS([getpass getspnam getusershell putenv])
AC_CHECK_FUNCS([clearenv strlcpy strlcat daemon basename _getpty getaddrinfo ])
AC_CHECK_FUNCS([freeaddrinfo getnameinfo fork writev getgrouplist])

AC_SEARCH_LIBS(basename, gen, AC_DEFINE(HAVE_BASENAME))

# Solaris needs ptmx
if test -z "$no_ptmx_check" ; then
	if test x"$cross_compiling" = x"no" ; then
		if test -e /dev/ptmx ; then
			AC_DEFINE(USE_DEV_PTMX,1,Use /dev/ptmx)
		fi
	else
		AC_MSG_NOTICE([Not checking for /dev/ptmx, we're cross-compiling])
	fi
fi

if test -z "$no_ptc_check" ; then
	if test x"$cross_compiling" = x"no" ; then
		if test -e /dev/ptc ; then
			AC_DEFINE(HAVE_DEV_PTS_AND_PTC,1,Use /dev/ptc & /dev/pts)
		fi
	else
		AC_MSG_NOTICE([Not checking for /dev/ptc & /dev/pts since we're cross-compiling])
	fi
fi

AC_EXEEXT

if test $BUNDLED_LIBTOM = 1 ; then
(cd $srcdir; find libtomcrypt -type d) | xargs mkdir -pv 
LIBTOM_FILES="libtomcrypt/Makefile libtommath/Makefile"
fi

AC_CONFIG_HEADER(config.h)
AC_CONFIG_FILES(Makefile $LIBTOM_FILES)
AC_OUTPUT

AC_MSG_NOTICE()
if test $BUNDLED_LIBTOM = 1 ; then
AC_MSG_NOTICE([Using bundled libtomcrypt and libtommath])
else
AC_MSG_NOTICE([Using system libtomcrypt and libtommath])
fi


if test "x$ac_cv_func_getpass" != xyes; then
AC_MSG_NOTICE()
AC_MSG_NOTICE([getpass() not available, dbclient will only have public-key authentication])
fi

if test "t$found_crypt_func" != there; then
AC_MSG_NOTICE()
AC_MSG_NOTICE([crypt() not available, dropbear server will not have password authentication])
fi

AC_MSG_NOTICE()
AC_MSG_NOTICE([Now edit localoptions.h to choose features.])