File: configure.ac

package info (click to toggle)
jabberd2 2.7.0-2
  • links: PTS, VCS
  • area: main
  • in suites: bookworm, bullseye, sid
  • size: 4,016 kB
  • sloc: ansic: 37,099; sh: 1,108; perl: 656; xml: 561; makefile: 511; python: 238; ruby: 145; sql: 55
file content (928 lines) | stat: -rw-r--r-- 35,370 bytes parent folder | download | duplicates (3)
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
# jabberd2 configure script
# Process this file with autoconf to produce a configure script.

AC_PREREQ(2.61)
AC_INIT([jabberd2], [2.7.0], [jabberd2@lists.xiaoka.com])
AC_CONFIG_SRCDIR([sx/sx.h])
AC_CONFIG_HEADER([config.h])
AC_CONFIG_MACRO_DIRS([m4])
AM_INIT_AUTOMAKE
AM_SILENT_RULES([yes])

# Checks for programs.
AC_PROG_CC
AC_PROG_CC_STDC
AM_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
# libtool for internal linking
AC_DISABLE_STATIC
AC_LIBTOOL_DLOPEN
AC_PROG_LIBTOOL

if test "x-$lt_cv_dlopen_libs" != "x-" ; then
    LIBS="$LIBS $lt_cv_dlopen_libs"
fi

# extra paths
AC_ARG_WITH([extra_include_path], AC_HELP_STRING([--with-extra-include-path],
                                           [use additional include paths]),
            extra_include_path=$withval)
split_includes="`echo $extra_include_path | sed -e 's/:/ /g'`"
for incpath in $split_includes ; do
    CPPFLAGS="-I$incpath $CPPFLAGS"
done

AC_ARG_WITH([extra_library_path], AC_HELP_STRING([--with-extra-library-path],
                                               [use additional library paths (remember to update /etc/ld.so.conf too)]),
            extra_library_path=$withval)
split_libs="`echo $extra_library_path | sed -e 's/:/ /g'`"
for libpath in $split_libs ; do
    LDFLAGS="-L$libpath $LDFLAGS"
done

# set type of "char" to be "unsigned char"
CFLAGS="$CFLAGS -funsigned-char"

# developer flags
AC_ARG_ENABLE([developer], AC_HELP_STRING([--enable-developer], [Compile with warnings and debugging symbols]),
              CFLAGS="-Wall -Wno-pointer-sign -g $CFLAGS")
# debugging
AC_ARG_ENABLE(debug, AC_HELP_STRING([--enable-debug], [enable debug messages]),
              want_debug=$enableval, want_debug=no)
if test "x-$want_debug" = "x-yes" ; then
    AC_DEFINE(DEBUG,1,[Define to 1 if you want to get debug output with -D.])
    AC_DEFINE(SX_DEBUG,1,[Define to 1 if you want to get SX debug output with -D.])
fi

AC_ARG_ENABLE(nad_debug, AC_HELP_STRING([--enable-nad-debug], [enable NAD pointer tracking]),
              want_nad_debug=$enableval, want_nad_debug=no)
if test "x-$want_nad_debug" = "x-yes" ; then
    AC_DEFINE(NAD_DEBUG,1,[Define to 1 if you want to enable NAD pointer tracking.])
fi

AC_ARG_ENABLE(pool_debug, AC_HELP_STRING([--enable-pool-debug], [enable memory pool statistics]),
              want_pool_debug=$enableval, want_pool_debug=no)
if test "x-$want_pool_debug" = "x-yes" ; then
    AC_DEFINE(POOL_DEBUG,1,[Define to 1 if you want to enable memory pool statistics.])
fi

AC_ARG_ENABLE(mio_debug, AC_HELP_STRING([--enable-mio-debug], [enable managed IO debug output]),
              want_mio_debug=$enableval, want_mio_debug=no)
if test "x-$want_mio_debug" = "x-yes" ; then
    AC_DEFINE(MIO_DEBUG,1,[Define to 1 if you want to enable managed IO debug output.])
fi

# Colorized build output
AX_CHECK_COMPILE_FLAG([-fdiagnostics-color], [CFLAGS="${CFLAGS} -fdiagnostics-color"],
    [AX_CHECK_COMPILE_FLAG([-fcolor-diagnostics], [CFLAGS="${CFLAGS} -fcolor-diagnostics"])])

# Two-step header checking.  First check for headers which don't
# require any other headers.
AC_HEADER_DIRENT
AC_HEADER_RESOLV
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_HEADER_TIME
AC_CHECK_HEADERS([arpa/inet.h \
                  arpa/nameser.h \
                  fcntl.h \
                  netinet/in.h \
                  signal.h \
                  stdarg.h \
                  stdint.h \
                  stdlib.h \
                  string.h \
                  sys/filio.h \
                  sys/ioctl.h \
                  sys/socket.h \
                  sys/time.h \
                  sys/timeb.h \
                  sys/types.h \
                  sys/stat.h \
                  sys/utsname.h \
                  syslog.h \
                  unistd.h \
                  windows.h \
                  winsock2.h \
])

# Now check for those headers that do, including all the required
# headers.
AC_CHECK_HEADERS([resolv.h windns.h],,,
[#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_WINSOCK2_H
# include <winsock2.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_STRUCT_TM
AC_STRUCT_TIMEZONE
AC_TYPE_UINT16_T
AC_TYPE_UINT32_T
AC_TYPE_UINT8_T

# generic system types
AC_CREATE_STDINT_H(ac-stdint.h)

# Checks for library functions.
AC_FUNC_CLOSEDIR_VOID
AC_REPLACE_FNMATCH
AC_FUNC_FORK
AC_FUNC_MEMCMP
AC_FUNC_MKTIME
AC_FUNC_SELECT_ARGTYPES
AC_TYPE_SIGNAL
AC_FUNC_STAT
AC_FUNC_VPRINTF
AC_FUNC_SELECT_ARGTYPES
AC_CHECK_FUNCS([close \
                dup2 \
                fcntl \
                _findfirst \
                gethostname \
                getopt \
                getpagesize \
                getpid \
                gettimeofday \
                inet_aton \
                inet_ntoa \
                ioctl \
                isascii \
                memchr \
                memmove \
                memset \
                mkdir \
                _mkdir \
                modf \
                select \
                setenv \
                sleep \
                Sleep \
                socket \
                strcasecmp \
                strchr \
                strdup \
                strerror \
                stricmp \
                strncasecmp \
                strndup \
                strnicmp \
                strstr \
                tzset \
                uname \
])

AC_CHECK_FUNC([crypt], ,[AC_CHECK_LIB([crypt], [crypt])])
if test "x$ac_cv_lib_crypt_crypt" = "xyes"; then
  AC_DEFINE(HAVE_CRYPT, 1, [Define to 1 if you have the crypt() function])
fi
AM_CONDITIONAL(HAVE_CRYPT, [test "x$ac_cv_lib_crypt_crypt" = "xyes"])
AC_CHECK_FUNC([connect], ,[AC_CHECK_LIB([socket], [connect])])
AC_CHECK_LIB([ws2_32], [_head_libws2_32_a])

AC_CHECK_FUNC(gethostbyname, ,[AC_CHECK_LIB([resolv], [gethostbyname])])
AC_CHECK_FUNC(gethostbyname, ,[AC_CHECK_LIB([nsl], [gethostbyname])])
if test "x$ac_cv_lib_nsl_gethostbyname" != "xyes" && test "x$ac_cv_func_gethostbyname" != "xyes" ; then
  AC_CHECK_FUNC([gethostbyname], , [AC_CHECK_LIB([socket], [gethostbyname])])
fi
if test "$ac_cv_lib_nsl_gethostbyname" = "$ac_cv_func_gethostbyname" ; then
  AC_MSG_CHECKING([if we can include libnsl + libsocket])
  LIBS="-lnsl -lsocket $LIBS"
  AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[(void) gethostbyname]])],[my_ac_link_result=yes],[my_ac_link_result=no ])
  if test "$my_ac_link_result" = "no" ; then
    AC_MSG_RESULT([failure])
    AC_MSG_ERROR([unable to use gethostbyname()])
  else
    AC_MSG_RESULT([success])
  fi
fi

AC_SEARCH_LIBS(inet_ntop, nsl,[
    AC_DEFINE(HAVE_INET_NTOP, 1,
    [Define to 1 if you have the `inet_ntop' function.])])

dnl ** Check for inet_ntop
AC_SEARCH_LIBS(inet_pton, nsl,[
    AC_DEFINE(HAVE_INET_PTON, 1,
    [Define to 1 if you have the `inet_pton' function.])])

# windows has different names for a few basic things
if test "x-$ac_cv_func_getpid" != "x-yes" -a "x-$ac_cv_func__getpid" = "x-yes" ; then
    AC_DEFINE(getpid,_getpid,[Define to a function than can provide getpid(2) functionality.])
fi

if test "x-$ac_cv_func_sleep" != "x-yes" -a "x-$ac_cv_func_Sleep" = "x-yes" ; then
    AC_DEFINE(sleep,Sleep,[Define to a function than can provide sleep(2) functionality.])
fi

if test "x-$ac_cv_func_strcasecmp" != "x-yes" -a "x-$ac_cv_func_stricmp" = "x-yes" ; then
    AC_DEFINE(strcasecmp,stricmp,[Define to a function than can provide strcasecmp(3) functionality.])
fi

if test "x-$ac_cv_func_strncasecmp" != "x-yes" -a "x-$ac_cv_func_strnicmp" = "x-yes" ; then
    AC_DEFINE(strncasecmp,strnicmp,[Define to a function than can provide strncasecmp(3) functionality.])
fi

# winsock substitutions
if test "x-$ac_cv_func_close" != "x-yes" ; then
    AC_MSG_CHECKING(for closesocket)
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <winsock2.h>]],
                                    [[closesocket(0)]])],
                   [AC_MSG_RESULT(yes)
                    AC_DEFINE(close,closesocket,[Define to a function than can provide close(2) functionality.])],
                    AC_DEFINE(HAVE_CLOSE,1,[Define to 1 if you have the 'close' function.])
                   AC_MSG_RESULT(no))
fi

if test "x-$ac_cv_func_ioctl" != "x-yes" ; then
    AC_MSG_CHECKING(for ioctlsocket)
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <winsock2.h>]],
                                    [[ioctlsocket(0,0,0)]])],
                   [AC_MSG_RESULT(yes)
                    AC_DEFINE(ioctl,ioctlsocket,[Define to a function than can provide ioctl(2) functionality.])],
                    AC_DEFINE(HAVE_IOCTL,1,[Define to 1 if you have the 'ioctl' function.])
                   AC_MSG_RESULT(no))
fi

# res_query has been seen in libc, libbind and libresolv
if test "x-$ac_cv_header_resolv_h" = "x-yes" ; then
    AC_CHECK_FUNCS(res_query)
    if test "x-$ac_cv_func_res_query" = "x-yes" ; then
        have_res_query=yes
    else
        AC_CHECK_LIB(resolv, res_query)
        if test "x-$ac_cv_lib_resolv_res_query" = "x-yes" ; then
            have_res_query=yes
        else
            AC_CHECK_LIB(bind, res_query)
            if test "x-$ac_cv_lib_bind_res_query" = "x-yes" ; then
                have_res_query=yes
            else
                dnl some glibcs have res_query as a macro, so work around it
                AC_MSG_CHECKING([for res_query in -lresolv (alternate version)])
                save_libs="$LIBS"
                LIBS="-lresolv $LIBS"
                AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <resolv.h>]],
                                                [[res_query(0,0,0,0,0)]])],
                               [AC_MSG_RESULT(yes)
                                have_res_query=yes],
                               [AC_MSG_RESULT(no)
                                LIBS="$save_libs"])
            fi
        fi
    fi
fi
# windows calls it DnsQuery
if test "x-$ac_cv_header_windns_h" = "x-yes" ; then
    AC_MSG_CHECKING([for DnsQuery in -ldnsapi])
    save_libs="$LIBS"
    LIBS="-ldnsapi $LIBS"
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <windows.h>
                                      #include <windns.h>]],
                                    [[DnsQuery(0,0,0,0,0,0)]])],
                   [AC_MSG_RESULT(yes)
                    have_dnsquery=yes],
                   [AC_MSG_RESULT(no)
                    LIBS="$save_libs"])
fi
if test "x-$have_res_query" = "x-yes" ; then
    AC_DEFINE(HAVE_RES_QUERY,1,[Define to 1 if you have the 'res_query' function.])
elif test "x-$have_dnsquery" = "x-yes" ; then
    AC_DEFINE(HAVE_DNSQUERY,1,[Define to 1 if you have the 'DnsQuery' function.])
else
    AC_MSG_ERROR([no DNS resolver interface (res_query or DnsQuery) found])
fi

# syslog
if test "x-$ac_cv_header_syslog_h" = "x-yes" ; then
    AC_CHECK_FUNCS(syslog vsyslog)
fi

if test "x-$ac_cv_header_windows_h" = "x-yes" ; then
    AC_MSG_CHECKING(for ReportEvent)
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <windows.h>]],
                                    [[ReportEvent(0,0,0,0,0,0,0,0,0)]])],
                   [AC_MSG_RESULT(yes)
                    AC_DEFINE(HAVE_REPORTEVENT,1,[Define to 1 if you have the 'ReportEvent' function.])],
                   AC_MSG_RESULT(no))
fi

# snprintf/vsnprintf don't exist everywhere. additionally, we require
# them to gracefully accept NULLs, which is non-standard
AC_CHECK_FUNCS(snprintf vsnprintf)
if test "x-$ac_cv_func_snprintf" = "x-yes" ; then
    AC_MSG_CHECKING([if snprintf can handle NULL arguments])
    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdio.h>
                                    #include <signal.h>
                                    segv() { exit(1); }
                                    main() { char b[10]; signal(SIGSEGV,segv); snprintf(b,10,"%s",NULL); exit(0); }]])],
                  AC_MSG_RESULT(yes),
                  [AC_MSG_RESULT(no)
                   AC_DEFINE(HAVE_BROKEN_SNPRINTF,1,[Define to 1 if 'snprintf' cannot handle NULL arguments.])])
fi
if test "x-$ac_cv_func_vsnprintf" = "x-yes" ; then
    AC_MSG_CHECKING([if vsnprintf can handle NULL arguments])
    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdio.h>
                                    #include <signal.h>
                                    #include <stdarg.h>
                                    segv() { exit(1); }
                                    expand(char *f,...) { va_list ap; char b[10]; va_start(ap,f); vsnprintf(b,10,f,ap); va_end(ap); }
                                    main() { char b[10]; signal(SIGSEGV,segv); expand("%s", NULL); exit(0); }]])],
                  AC_MSG_RESULT(yes),
                  [AC_MSG_RESULT(no)
                   AC_DEFINE(HAVE_BROKEN_VSNPRINTF,1,[Define to 1 if 'vsnprintf' cannot handle NULL arguments.])])
fi
TYPE_SOCKLEN_T
#
# Checks for libraries.

# Expat
AC_CHECK_LIB([expat], [XML_ParserCreate])
if test "x-$ac_cv_lib_expat_XML_ParserCreate" != "x-yes" ; then
    AC_MSG_ERROR([Expat not found])
fi

# libidn >= 0.3.0
AC_CHECK_LIB(idn, stringprep_check_version)
if test "x-$ac_cv_lib_idn_stringprep_check_version" = "x-yes" ; then
    AC_MSG_CHECKING(for Libidn version >= 0.3.0)
    AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <stringprep.h>]],
                                   [[return !(stringprep_check_version("0.3.0"))]])],
                  [AC_MSG_RESULT(yes)
                    have_idn=yes],
                  AC_MSG_RESULT(no))
fi
if test "x-$have_idn" != "x-yes" ; then
    AC_MSG_ERROR([Libidn >= 0.3.0 not found])
fi

# udns
AC_CHECK_LIB(udns, dns_init)
if test "x-$ac_cv_lib_udns_dns_init" != "x-yes" ; then
    AC_MSG_ERROR([UDNS library not found])
fi

# GnuSASL
AC_CHECK_HEADERS(gsasl.h)
if test "x-$ac_cv_header_gsasl_h" = "x-yes" ; then
    AC_CHECK_LIB(gsasl, gsasl_check_version)
fi
if test "x-$ac_cv_lib_gsasl_gsasl_check_version" = "x-yes" ; then
    AC_MSG_CHECKING(for GnuSASL version >= 1.4.0)
    AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <gsasl.h>]],
                                   [[return !(gsasl_check_version("1.4.0"))]])],
                  [AC_MSG_RESULT(yes)
                    have_gsasl=yes],
                  AC_MSG_RESULT(no))
fi

if test "x-$have_gsasl" != "x-yes" ; then
    AC_MSG_ERROR([GnuSASL >= 1.4.0 not found])
fi

#
# optional libs

# OpenSSL >= 1.0.2
AC_ARG_ENABLE(ssl, AC_HELP_STRING([--enable-ssl], [enable SSL/TLS support (yes)]), want_ssl=$enableval, want_ssl=yes)
AS_IF([test "x$want_ssl" = "xyes"], [
	PKG_CHECK_MODULES(SSL, openssl >= 1.0.2,
		have_ssl="yes"
    AC_DEFINE(HAVE_SSL,1,[Define to 1 if OpenSSL is available.])
	)
])
AM_CONDITIONAL(HAVE_SSL, [test "x$have_ssl" = "xyes"])

dnl Check for & handle argument to --with-zlib.
_cppflags=$CPPFLAGS
_ldflags=$LDFLAGS
AC_ARG_WITH(zlib,
AC_HELP_STRING([--with-zlib=DIR],[search for zlib in DIR])
AC_HELP_STRING([--without-zlib],[disable use of zlib]),
               [OPT_ZLIB="$withval"])

if test "$OPT_ZLIB" = "no" ; then
    AC_MSG_WARN([zlib disabled])
else
  if test "$OPT_ZLIB" = "yes" ; then
     OPT_ZLIB=""
  fi

  if test -z "$OPT_ZLIB" ; then
    dnl check for the lib first without setting any new path, since many
    dnl people have it in the default path

    AC_CHECK_LIB(z, inflateEnd,
                   dnl libz found, set the variable
                   [HAVE_LIBZ="1"],
                   dnl if no lib found, try /usr/local
                   [OPT_ZLIB="/usr/local"])

  fi

  dnl Add a nonempty path to the compiler flags
  if test -n "$OPT_ZLIB"; then
     CPPFLAGS="$CPPFLAGS -I$OPT_ZLIB/include"
     LDFLAGS="$LDFLAGS -L$OPT_ZLIB/lib$libsuff"
  fi

  AC_CHECK_HEADER(zlib.h,
    [
    dnl zlib.h was found
    HAVE_ZLIB_H="1"
    dnl if the lib wasn't found already, try again with the new paths
    if test "$HAVE_LIBZ" != "1"; then
      AC_CHECK_LIB(z, gzread,
                   [
                   dnl the lib was found!
                   HAVE_LIBZ="1"
                   ],
                   [ CPPFLAGS=$_cppflags
                   LDFLAGS=$_ldflags])
    fi
    ],
    [
      dnl zlib.h was not found, restore the flags
      CPPFLAGS=$_cppflags
      LDFLAGS=$_ldflags]
    )

  if test "$HAVE_LIBZ" = "1" && test "$HAVE_ZLIB_H" != "1"
  then
    AC_MSG_WARN([configure found only the libz lib, not the header file!])
  elif test "$HAVE_LIBZ" != "1" && test "$HAVE_ZLIB_H" = "1"
  then
    AC_MSG_WARN([configure found only the libz header file, not the lib!])
  elif test "$HAVE_LIBZ" = "1" && test "$HAVE_ZLIB_H" = "1"
  then
    dnl both header and lib were found!
    AC_SUBST(HAVE_LIBZ)
    AC_DEFINE(HAVE_ZLIB_H, 1, [if you have the zlib.h header file])
    AC_DEFINE(HAVE_LIBZ, 1, [if zlib is available])
    LIBS="$LIBS -lz"
  fi
fi
AM_CONDITIONAL(HAVE_LIBZ, [test "$HAVE_LIBZ" = "1"])

# MySQL
AC_ARG_ENABLE([mysql],
	AC_HELP_STRING([--enable-mysql[=DIR]], [enable MySQL auth/reg/storage support (no)]),
	[ enable_mysql="$enableval" have_mysql=no  MYSQL_PREFIX="$enableval" ],
	[ enable_mysql=no           have_mysql=no ])

if test "x-$enable_mysql" != "x-no" ; then
	if test "$MYSQL_PREFIX" = "yes" ; then
		MYSQL_PREFIX=/usr
	fi

	AC_PATH_PROG(mysqlconfig,mysql_config,,[$MYSQL_PREFIX/bin:$PATH])
	if test [ -z "$mysqlconfig" ]
	then
		AC_MSG_ERROR([mysql_config executable not found: MySQL 5.0 or greater is required.])
	else
		AC_MSG_CHECKING(MySQL libraries)
		MYSQL_LIBS=`${mysqlconfig} --libs`
		AC_MSG_RESULT("$MYSQL_LIBS")

		AC_MSG_CHECKING(mysql includes)
		MYSQL_CFLAGS=`${mysqlconfig} --cflags`
		AC_MSG_RESULT("$MYSQL_CFLAGS")

		MYSQL_VERSION=`${mysqlconfig} --version`
		MYSQL_VERSION_MAJOR=${MYSQL_VERSION%%.*}
		if test $MYSQL_VERSION_MAJOR -lt 5 ; then
			AC_MSG_ERROR([MySQL version 5.0 or greater required.])
		fi

		have_mysql=yes
		AC_DEFINE(STORAGE_MYSQL, 1, [Define to 1 if you want to use MySQL for storage.])
	fi
fi
AC_SUBST(MYSQL_CFLAGS)
AC_SUBST(MYSQL_LIBS)
AM_CONDITIONAL(STORAGE_MYSQL, [test "x-$have_mysql" = "x-yes"])

# PostgreSQL
AC_ARG_ENABLE([pgsql],
        AC_HELP_STRING([--enable-pgsql[=DIR]], [enable PostgreSQL auth/reg/storage support (no)]),
        [ enable_pgsql="$enableval" have_pgsql=no  PGSQL_PREFIX="$enableval"],
        [ enable_pgsql=no           have_pgsql=no ])
if test "x-$enable_pgsql" != "x-no" ; then
	if test "$PGSQL_PREFIX" = "yes" ; then
		PGSQL_PREFIX=/usr
	fi

	AC_PATH_PROG(pgconfig,pg_config,,[$PGSQL_PREFIX/bin:$PATH])
	if test [ -z "$pgconfig" ]
	then
		AC_MSG_ERROR([pg_config executable not found: PostgreSQL 8.0 or greater is required.])
	else
		AC_MSG_CHECKING(PostgresSQL libraries)
		PGSQL_LIBDIR=`$pgconfig --libdir`
		PGSQL_LIBS="-L$PGSQL_LIBDIR -lpq"
		AC_MSG_RESULT("$PGSQL_LIBS")

		AC_MSG_CHECKING(pgsql includes)
		PGSQL_INCLUDE=`$pgconfig --includedir`
		PGSQL_CFLAGS="-I$PGSQL_INCLUDE"
		AC_MSG_RESULT("$PGSQL_CFLAGS")

		have_pgsql=yes
		AC_DEFINE([STORAGE_POSTGRES],[1],[Define to 1 if you want to use PostgreSQL for storage.])
	fi
fi
AC_SUBST(PGSQL_CFLAGS)
AC_SUBST(PGSQL_LIBS)
AM_CONDITIONAL(STORAGE_PGSQL, [test "x-$have_pgsql" = "x-yes"])

# SQLite 3
AC_ARG_ENABLE([sqlite],
        AS_HELP_STRING([--enable-sqlite], [enable SQLite3 auth/reg/storage support (no)]),
        [enable_sqlite=$enableval have_sqlite=no],
        [enable_sqlite=no         have_sqlite=no])
if test "x-$enable_sqlite" = "x-yes" ; then
    AC_CHECK_HEADERS([sqlite3.h], [
                AC_CHECK_LIB([sqlite3], [sqlite3_open], [
                        have_sqlite=yes
                        SQLITE_LIBS="-lsqlite3"
                        AC_DEFINE(STORAGE_SQLITE, 1, [Define to 1 if you want to use SQLite 3 for storage.])
                ])
        ])
        if test "x-$have_sqlite" != "x-yes" ; then
                AC_MSG_ERROR([SQLite3 support requested, but headers/libraries not found.])
        fi
fi
AC_SUBST(SQLITE_LIBS)
AM_CONDITIONAL(STORAGE_SQLITE, [test "x-$have_sqlite" = "x-yes"])

# Berkeley DB
_save_libs="$LIBS"
AC_ARG_ENABLE(db, AC_HELP_STRING([--enable-db], [enable Berkeley DB auth/reg/storage support (no)]),
              want_db=$enableval, want_db=no)
if test "x-$want_db" = "x-yes" ; then
    AC_CHECK_HEADERS(db.h)
    if test "x-$ac_cv_header_db_h" = "x-yes" ; then
        for lib in db43 db42 db-4.3 db-4.2 db-4.1 db-4 db4 db41 db ; do
            if test "xxx$have_db_version" != "xxxyes" ; then
                AC_MSG_CHECKING([for db_create in -l$lib])
                save_libs="$LIBS"
                LIBS="-l$lib $LIBS"
                AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <db.h>]],
                                                [[db_create(0,0,0)]])],
                               [AC_MSG_RESULT(yes)
                                AC_MSG_CHECKING(for Berkeley DB version >= 4.1.25)
                                AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <db.h>]],
                                                               [[do {
                                                                     int major, minor, patch;
                                                                     db_version(&major, &minor, &patch);
                                                                     if(major < 4 ||
                                                                         (major == 4 && minor < 1) ||
                                                                         (major == 4 && minor == 1 && patch < 24) ||
                                                                         (int)DB_VERSION_MAJOR != major ||
                                                                         (int)DB_VERSION_MINOR != minor)
                                                                         return 1;
                                                                 } while(0)]])],
                                              [AC_MSG_RESULT(yes)
                                               have_db_version=yes
                                               DB_LIBS="-l$lib"],
                                              AC_MSG_RESULT(no))],
                                AC_MSG_RESULT(no))
                LIBS="$save_libs"
            fi
        done
    fi
    if test "x-$have_db_version" != "x-yes" ; then
        AC_MSG_ERROR([Berkeley DB >= 4.1.24 not found])
    else
        AC_DEFINE(STORAGE_DB,1,[Define to 1 if you want to use Berkeley DB for auth/reg/storage.])
    fi
fi
AC_SUBST(DB_LIBS)
AM_CONDITIONAL(STORAGE_DB, [test "x-$have_db_version" = "x-yes"])
LIBS="$_save_libs"

# Oracle
AC_ARG_WITH(oracle-home,
        AC_HELP_STRING([--with-oracle-home=DIR], [the Oracle home directory, for includes and libs]),
        [ ac_oracle_home="$withval" ])

AC_ARG_ENABLE(oracle, AC_HELP_STRING([--enable-oracle], [enable Oracle auth/reg/storage support (no)]),
              want_oracle=$enableval, want_oracle=no)
if test "x-$want_oracle" = "x-yes" ; then
    AC_CHECK_HEADERS(oci.h)
    if test "x-$ac_cv_header_oci_h" != "x-yes" ; then
       if test -n $ac_oracle_home ; then
          AC_MSG_CHECKING([for oci.h in $ac_oracle_home])
                save_cppflags="$CPPFLAGS"
                CPPFLAGS="-I$ac_oracle_home/rdbms/demo -I$ac_oracle_home/rdbms/public $CPPFLAGS"
                save_libs="$LIBS"
                LIBS="-L$ac_oracle_home/lib $LIBS"
                save_ldflags="$LDFLAGS"
                LDFLAGS="-Wl,-rpath,$ac_oracle_home/lib $LDFLAGS"
                AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <oci.h>]])],
                                  [AC_MSG_RESULT(yes)
                                   AC_DEFINE(HAVE_OCI_H,,[Define if you have oci.h])
                                   ac_cv_header_oci_h=yes],
                                  AC_MSG_RESULT(no))
                if test "x-$ac_cv_header_oci_h" != "x-yes" ; then
                    CPPFLAGS="$save_cppflags"
                    LIBS="$save_libs"
                    LDFLAGS="$save_ldflags"
                fi
       fi
    fi
    if test "x-$ac_cv_header_oci_h" = "x-yes" ; then
        AC_CHECK_LIB(clntsh, OCIInitialize)
    fi
    if test "x-$ac_cv_lib_clntsh_OCIInitialize" != "x-yes" ; then
        AC_MSG_ERROR([Oracle client libraries not found])
    else
        have_oracle="yes"
        ORACLE_CPPFLAGS="-I$ac_oracle_home/rdbms/demo -I$ac_oracle_home/rdbms/public"
        ORACLE_LIBS="-L$ac_oracle_home/lib"
        ORACLE_LDFLAGS="-Wl,-rpath,$ac_oracle_home/lib"
        AC_DEFINE(STORAGE_ORACLE,1,[Define to 1 if you want to use Oracle for auth/reg/storage.])
    fi
fi
AC_SUBST(ORACLE_CPPFLAGS)
AC_SUBST(ORACLE_LIBS)
AC_SUBST(ORACLE_LDFLAGS)
AM_CONDITIONAL(STORAGE_ORACLE, [test "x-$have_oracle" = "x-yes"])

# OpenLDAP
AC_ARG_ENABLE(ldap, AC_HELP_STRING([--enable-ldap], [enable OpenLDAP auth/reg support (no)]),
              want_ldap=$enableval, want_ldap=no)
if test "x-$want_ldap" = "x-yes" ; then
    AC_CHECK_HEADERS(lber.h ldap.h)
    save_libs="$LIBS"
    if test "x-$ac_cv_header_ldap_h" = "x-yes" -a "x-$ac_cv_header_lber_h" = "x-yes" ; then
        AC_CHECK_LIB(lber, ber_alloc)
        AC_CHECK_LIB(ldap, ldap_init)
    fi
    if test "x-$ac_cv_lib_lber_ber_alloc" = "x-yes" -a "x-$ac_cv_lib_ldap_ldap_init" = "x-yes" ; then
        AC_MSG_CHECKING(for OpenLDAP version >= 2.1.0)
        AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <lber.h>
                                         #include <ldap.h>]],
                                       [[do {
                                             LDAPAPIInfo info;
                                             info.ldapai_info_version = LDAP_API_INFO_VERSION;
                                             ldap_get_option(0, LDAP_OPT_API_INFO, &info);
                                             if(info.ldapai_vendor_version != LDAP_VENDOR_VERSION || LDAP_VENDOR_VERSION < 2004)
                                                 return 1;
                                         } while(0)]])],
                                       [AC_MSG_RESULT(yes)
                                        have_ldap_version=yes],
                                       AC_MSG_RESULT(no))
    fi
    LIBS="$save_libs"
    if test "x-$have_ldap_version" != "x-yes" ; then
        AC_MSG_ERROR([OpenLDAP client libraries >= 2.1.0 not found])
    else
        LDAP_LIBS="-llber -lldap"
        AC_DEFINE(STORAGE_LDAP,1,[Define to 1 if you want to use OpenLDAP for auth/reg.])
    fi
fi
AC_SUBST(LDAP_LIBS)
AM_CONDITIONAL(STORAGE_LDAP, [test "x-$have_ldap_version" = "x-yes"])

# Plugabble Authentication Modules (PAM)
AC_ARG_ENABLE(pam, AC_HELP_STRING([--enable-pam], [enable PAM auth/reg support (no)]),
              want_pam=$enableval, want_pam=no)
if test "x-$want_pam" = "x-yes" ; then
    AC_CHECK_HEADERS(security/pam_appl.h)
    if test "x-$ac_cv_header_security_pam_appl_h" = "x-yes" ; then
        AC_CHECK_LIB(pam, pam_start, [
	    have_pam="yes"
            PAM_LIBS="-lpam"
            AC_DEFINE(STORAGE_PAM,1,[Define to 1 if you want to use PAM for auth/reg.])
	], [AC_MSG_ERROR([PAM application libraries not found])])
    fi
fi
AC_SUBST(PAM_LIBS)
AM_CONDITIONAL(STORAGE_PAM, [test "x-$have_pam" = "x-yes"])

# pipe (not really an external package, but does need some checks)
AC_ARG_ENABLE(pipe, AC_HELP_STRING([--enable-pipe], [enable pipe auth/reg support (no)]),
              want_pipe=$enableval, want_pipe=no)
if test "x-$want_pipe" = "x-yes" ; then
    AC_CHECK_HEADERS(sys/wait.h)
    AC_FUNC_FORK
    AC_CHECK_FUNCS(pipe wait)
    if test "x-$ac_cv_header_sys_wait_h" != "x-yes" -o \
            "x-$ac_cv_func_fork" != "x-yes" -o \
            "x-$ac_cv_func_pipe" != "x-yes" -o \
            "x-$ac_cv_func_wait" != "x-yes" ; then
        AC_MSG_ERROR([Pipe auth/reg requirements (sys/wait.h, fork(), pipe(), wait()) not found])
    else
        have_pipe="yes"
        AC_DEFINE(STORAGE_PIPE,1,[Define to 1 if you want to use pipes for auth/reg.])
    fi
fi
AM_CONDITIONAL(STORAGE_PIPE, [test "x-$have_pipe" = "x-yes"])

# Anonymous
AC_ARG_ENABLE(anon, AC_HELP_STRING([--enable-anon], [enable anonymous auth/reg support (no)]),
              want_anon=$enableval, want_anon=no)
if test "x-$want_anon" = "x-yes" ; then
    AC_DEFINE(STORAGE_ANON,1,[Define to 1 if you want anonymous auth.])
fi
AM_CONDITIONAL(STORAGE_ANON, [test "x-$want_anon" = "x-yes"])


# Filesystem storage
AC_ARG_ENABLE(fs, AC_HELP_STRING([--enable-fs], [enable filesystem storage support (no)]),
              want_fs=$enableval, want_fs=no)
if test "x-$want_fs" = "x-yes" ; then
    AC_DEFINE(STORAGE_FS,1,[Define to 1 if you want to use the filesystem for storage.])
fi
AM_CONDITIONAL(STORAGE_FS, [test "x-$want_fs" = "x-yes"])

# WebSocket support
AC_ARG_ENABLE(websocket, AC_HELP_STRING([--enable-websocket], [enable WebSocket support on C2S port (no)]),
              want_websocket=$enableval, want_websocket=no)
if test "x-$want_websocket" = "x-yes" ; then
    AC_CHECK_LIB([http_parser], [http_parser_init])
    if test "x-$ac_cv_lib_http_parser_http_parser_init" != "x-yes" ; then
        AC_MSG_ERROR([http_parser not found])
    else
        AC_DEFINE(USE_WEBSOCKET,1,[Define to 1 if you want to have WebSocket support in C2S.])
    fi
fi
AM_CONDITIONAL(USE_WEBSOCKET, [test "x-$want_websocket" = "x-yes"])

#
# IPv6 checks
AC_DEFUN([_IP6_INCLUDES],[[
#include "ac-stdint.h"
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
]])

# these types are sometimes missing
AC_CHECK_TYPES([in_port_t, sa_family_t, struct sockaddr_storage, struct sockaddr_in6, struct in6_addr],,, _IP6_INCLUDES)

# some glibcs have broken sockaddr_storage members
if test "x-$ac_cv_type_struct_sockaddr_storage" = "x-yes" ; then
    AC_MSG_CHECKING(for broken __ss_family member in struct sockaddr_storage)
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM(_IP6_INCLUDES,
                                       [[do {
                                             struct sockaddr_storage s;
                                             s.__ss_family = 0;
                                         } while(0)]])],
                      [AC_MSG_RESULT(yes)
                       AC_DEFINE(ss_family, __ss_family,
                                 [Define to '__ss_family' if 'struct sockaddr_storage' defines '__ss_family' instead of 'ss_family'.])],
                      AC_MSG_RESULT(no))

    AC_MSG_CHECKING(for broken __ss_len member in struct sockaddr_storage)
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM(_IP6_INCLUDES,
                                       [[do {
                                             struct sockaddr_storage s;
                                             s.__ss_len = 0;
                                         } while(0)]])],
                      [AC_MSG_RESULT(yes)
                       AC_DEFINE(ss_len, __ss_len,
                                 [Define to '__ss_len' if 'struct sockaddr_storage' defines '__ss_len' instead of 'ss_len'.])],
                      AC_MSG_RESULT(no))
fi


#
# mio backend selection

AC_ARG_ENABLE(mio, AC_HELP_STRING([--enable-mio=BACKENDS], [use one of BACKENDS to drive MIO (select poll epoll kqueue)]),
              mio_check=$enableval, mio_check='select poll epoll kqueue')

mio_backend=''
for backend in $mio_check ; do
    case x-$backend in

        x-kqueue)
        AC_CHECK_HEADERS(sys/event.h)
        if test "x-$ac_cv_header_sys_event_h" = "x-yes" ; then
            AC_CHECK_FUNCS(kqueue,[
                mio_backend='kqueue'
                AC_DEFINE(MIO_KQUEUE,1,[Define to 1 if you want to use 'kqueue' for non-blocking I/O.])])
        fi
        ;;

        x-epoll)
            AC_CHECK_HEADERS(sys/epoll.h)
            if test "x-$ac_cv_header_sys_epoll_h" = "x-yes" ; then
                AC_CHECK_FUNCS(epoll_create,[
                    mio_backend='epoll'
                    AC_DEFINE(MIO_EPOLL,1,[Define to 1 if you want to use 'epoll' for non-blocking I/O.])])
            fi
            ;;

        x-poll)
            AC_CHECK_HEADERS(poll.h)
            if test "x-$ac_cv_header_poll_h" = "x-yes" ; then
                AC_CHECK_FUNCS(poll,[
                    mio_backend='poll'
                    AC_DEFINE(MIO_POLL,1,[Define to 1 if you want to use 'poll' for non-blocking I/O.])])
            fi
            ;;

        x-select)
            AC_CHECK_HEADERS(sys/select.h)
            if test "x-$ac_cv_header_sys_select_h" = "x-yes" ; then
                AC_CHECK_FUNCS(select, have_select=yes)
            fi

            if test "x-$have_select" != "x-yes" -a "x-$ac_cv_header_winsock2_h" = "x-yes" ; then
                AC_MSG_CHECKING([for select in ws2_32])
                AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <winsock2.h>]],
                                                [[select(0,0,0,0,0)]])],
                               [AC_MSG_RESULT(yes)
                                have_select=yes],
                               AC_MSG_RESULT(no))
            fi

            if test "x-$have_select" = "x-yes" ; then
                mio_backend='select'
                AC_DEFINE(MIO_SELECT,1,[Define to 1 if you want to use 'select' for non-blocking I/O.])
            fi
            ;;
    esac
done

if test "x-$mio_backend" = "x-" ; then
    AC_MSG_ERROR([no MIO backend available out of: $mio_check])
else
    AC_MSG_NOTICE([using MIO backend: $mio_backend])
fi

# use libc function substitution library?
AC_ARG_WITH(subst,
AC_HELP_STRING([--without-subst],[disable use of substitution library]),
               [OPT_LIBSUBST="$withval"])
AC_SUBST(USE_LIBSUBST)
AM_CONDITIONAL(USE_LIBSUBST, [test "$OPT_LIBSUBST" != "no"])

# conditional features
AC_ARG_ENABLE(superseded, AC_HELP_STRING([--enable-superseded], [enable superseded XEP support (yes)]),
              want_superseded=$enableval, want_superseded=no)
if test "x-$want_superseded" = "x-yes" ; then
    AC_DEFINE(ENABLE_SUPERSEDED,1,[Define to 1 if you want to compile-in superseded XEP handlers.])
fi

AC_ARG_ENABLE(experimental, AC_HELP_STRING([--enable-experimental], [enable experimental features (yes)]),
              want_experimental=$enableval, want_experimental=no)
if test "x-$want_experimental" = "x-yes" ; then
    AC_DEFINE(ENABLE_EXPERIMENTAL,1,[Define to 1 if you want to compile-in experimental features.])
fi
AM_CONDITIONAL(ENABLE_EXPERIMENTAL, [test "x-$want_experimental" = "x-yes"])

AC_ARG_ENABLE(tests, AC_HELP_STRING([--enable-tests], [enable tests (yes)]),
              want_tests=$enableval, want_tests=yes)
if test "x-$want_tests" = "x-yes" ; then
    PKG_CHECK_MODULES([CHECK], [check >= 0.9.4], [want_tests=yes], [want_tests=no])
fi
AM_CONDITIONAL(ENABLE_TESTS, [test "x-$want_tests" = "x-yes"])

AC_ARG_ENABLE([werror], AC_HELP_STRING([--enable-werror], [Treat all warnings as error]),
              CFLAGS="-Wall -Werror $CFLAGS")

# Generate Makefiles
AC_CONFIG_FILES([Doxyfile
                 Makefile
                 etc/Makefile
                 etc/templates/Makefile
                 man/Makefile
                 subst/Makefile
                 util/Makefile
                 mio/Makefile
                 sx/Makefile
                 storage/Makefile
                 c2s/Makefile
                 router/Makefile
                 s2s/Makefile
                 sm/Makefile
                 tools/Makefile
                 tests/Makefile])
AC_OUTPUT