summaryrefslogtreecommitdiff
path: root/configure.in
blob: 75c20dd48891206aa26d47d12ab353c1c71898bc (plain) (blame)
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
#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_INIT(rAthena)
AC_REVISION($Revision$)
AC_PREREQ([2.59])
AC_CONFIG_SRCDIR([src/common/cbasetypes.h])
AC_CONFIG_FILES([Makefile src/common/Makefile])
AC_CONFIG_FILES([3rdparty/mt19937ar/Makefile 3rdparty/libconfig/Makefile])
AC_CONFIG_FILES([src/char/Makefile src/login/Makefile])
AC_CONFIG_FILES([src/map/Makefile src/plugins/Makefile src/tool/Makefile])

AC_GNU_SOURCE

#
# Memory managers
#
AC_ARG_ENABLE(
	[manager],
	AC_HELP_STRING(
		[--enable-manager=ARG],
		[memory managers: no, builtin, memwatch, dmalloc, gcollect, bcheck (defaults to builtin)]
	),
	[
		enable_manager="$enableval"
		case $enableval in
			"no");;
			"builtin");;
			"memwatch");;
			"dmalloc");;
			"gcollect");;
			"bcheck");;
			*) AC_MSG_ERROR([[unknown memory manager '$enableval'... stopping]]);;
		esac
	],
	[enable_manager="builtin"]
)


#
# packetver
#
AC_ARG_ENABLE(
	[packetver],
	AC_HELP_STRING(
		[--enable-packetver=ARG],
		[Sets the PACKETVER define of the map-server. (see src/map/clif.h)]
	),
	[enable_packetver="$enableval"],
	[enable_packetver=""]
)


#
# debug
#
AC_ARG_ENABLE(
	[debug],
	AC_HELP_STRING(
		[--enable-debug@<:@=ARG@:>@],
		[
			Compiles extra debug code. (disabled by default)
			(available options: yes, no, gdb)
		]
	),
	[
		enable_debug="$enableval"
		case $enableval in
			"no");;
			"yes");;
			"gdb");;
			*) AC_MSG_ERROR([[invalid argument --enable-debug=$enableval... stopping]]);;
		esac
	],
	[enable_debug="no"]
)

#
# Buildbot
#
AC_ARG_ENABLE(
	[buildbot],
	AC_HELP_STRING(
		[--enable-buildbot@<:@=ARG@:>@],
		[(available options: yes, no)]
	),
	[
		enable_buildbot="$enableval"
		case $enableval in
			"no");;
			"yes");;
			*) AC_MSG_ERROR([[invalid argument --enable-buildbot=$enableval... stopping]]);;
		esac
	],
	[enable_buildbot="no"]
)

#
# RDTSC as Tick Source 
#
AC_ARG_ENABLE(
	[rdtsc],
	AC_HELP_STRING(
		[--enable-rdtsc],
		[
			Uses rdtsc as timing source (disabled by default)
			Enable it when you've timing issues.

			(For example:  in conjunction with XEN or Other Virtualization mechanisms)
		
			Note:
				Please ensure that you've disabled dynamic CPU-Frequencys, such as power saving options.
				(On the most modern Dedicated Servers cpufreq is preconfigured, see your distribution's manual
				 how to disable it)
		]
	),
	[
		enable_rdtsc=1
	],
	[enable_rdtsc=0]
)

#
# Profiler
#
AC_ARG_ENABLE(
	[profiler],
	AC_HELP_STRING(
		[--enable-profiler=ARG],
		[Profilers: no, gprof (disabled by default)]
	),
	[
		enable_profiler="$enableval"
		case $enableval in
			"no");;
			"gprof");;
			*) AC_MSG_ERROR([[invalid argument --enable-profiler=$enableval... stopping]]);;
		esac
	],
	[enable_profiler="no"]
)


#
# 64bit
#
AC_ARG_ENABLE(
	[64bit],
	AC_HELP_STRING(
		[--disable-64bit],
		[
			Disable 64bit binary building (enabled by default)
		]
	),
	[
		enable_64bit="$enableval"
		case $enableval in
			"no");;
			"yes");;
			*) AC_MSG_ERROR([[invalid argument --enable-64bit=$enableval... stopping]]);;
		esac
	],
	[enable_64bit="yes"]
)


#
# LTO
#
AC_ARG_ENABLE(
    [lto],
    AC_HELP_STRING(
        [--enable-lto],
        [
			Enables or Disables Linktime Code Optimization (LTO is enabled by default)
        ]
    ),
    [
        enable_lto="$enableval"
        case $enableval in
            "no");;
            "yes");;
            *) AC_MSG_ERROR([[invalid argument --enable-lto=$disableval... stopping]]);;
        esac
    ],
    [enable_lto="yes"]
)


#
# Optionally specify the path to mysql_config
#
AC_ARG_WITH(
	[mysql],
	AC_HELP_STRING(
		[--with-mysql@<:@=ARG@:>@],
		[optionally specify the path to the mysql_config executable]
	),
	[
		if test "$withval" != "no" ; then
			if test ! -x "$withval" ; then
				AC_MSG_ERROR([$withval is not an executable file])
			fi
			MYSQL_CONFIG_HOME="$withval"
		fi
	]
)


#
# Manual MYSQL_CFLAGS (optional)
#
AC_ARG_WITH(
	[MYSQL_CFLAGS],
	AC_HELP_STRING(
		[--with-MYSQL_CFLAGS=ARG],
		[specify MYSQL_CFLAGS manually (instead of using "mysql_config --include")]
	),
	[
		manual_MYSQL_CFLAGS="yes"
		MYSQL_CFLAGS="$withval"
	],
	[manual_MYSQL_CFLAGS="no"]
)


#
# Manual MYSQL_LIBS (optional)
#
AC_ARG_WITH(
	[MYSQL_LIBS],
	AC_HELP_STRING(
		[--with-MYSQL_LIBS=ARG],
		[specify MYSQL_LIBS manually (instead of using "mysql_config --libs")]
	),
	[
		manual_MYSQL_LIBS="yes"
		MYSQL_LIBS="$withval"
	],
	[manual_MYSQL_LIBS="no"]
)


#
# Enable/disable PCRE and optionally specify the path (optional library)
#
AC_ARG_WITH(
	[pcre],
	AC_HELP_STRING(
		[--with-pcre@<:@=ARG@:>@],
		[use PCRE library, optionally specify the full path of pcre installation directory (by default pcre is used if found)]
	),
	[
		if test "$withval" = "no" ; then
			want_pcre="no"
		else
			want_pcre="yes"
			require_pcre="yes"
			if test "$withval" != "yes" ; then
				if test ! -d "$withval" ; then
					AC_MSG_ERROR([$withval is not a directoy])
				fi
				PCRE_HOME="$withval"
			fi
		fi
	],
	[want_pcre="yes" require_pcre="no"]
)


#
# Specify the path of the zlib library (required library)
#
AC_ARG_WITH(
	[zlib],
	AC_HELP_STRING(
		[--with-zlib=DIR],
		[root directory path of zlib installation (defaults to /usr/local or /usr if not found in /usr/local).
		 Assumes that the header files are in DIR/include and the library files are in DIR/lib]
	),
	[
		test -n "$withval" && ZLIB_HOME="$withval"
	],
	[
		ZLIB_HOME=/usr/local
		test ! -f "${ZLIB_HOME}/include/zlib.h" && ZLIB_HOME=/usr
	]
)



###############################################################################
# Check for programs and types.
#



AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CPP
AC_PATH_PROG(AR, ar)
AC_LANG([C])


CFLAGS="$CFLAGS -pipe -ffast-math -Wall -Wno-sign-compare"
CPPFLAGS="$CPPFLAGS -I../common"


AC_C_BIGENDIAN(
	[AC_MSG_ERROR([[bigendian is not supported... stopping]])],
	,
	[AC_MSG_WARN([[unable to determine endianess, only little endian is supported]])]
)


if test "$enable_64bit" = "no" ; then
	AC_MSG_CHECKING([whether pointers can be stored in ints (old code)])
	pointers_fit_in_ints="no"
	AC_COMPILE_IFELSE(
		[AC_LANG_PROGRAM([[static int test_array[((long int)sizeof(int)) == ((long int)sizeof(void*)) ? 1 : -1];]])],
		[pointers_fit_in_ints="yes"],
		[]
	)
	if test "$pointers_fit_in_ints" = "no" ; then
		CFLAGS="$CFLAGS -m32"
		LDFLAGS="$LDFLAGS -m32"
		AC_COMPILE_IFELSE(
			[AC_LANG_PROGRAM([[static int test_array[((long int)sizeof(int)) == ((long int)sizeof(void *)) ? 1 : -1];]])],
			[pointers_fit_in_ints="yes (with -m32)"],
			[]
		)
	fi
	AC_MSG_RESULT($pointers_fit_in_ints)
	if test "$pointers_fit_in_ints" = "no" ; then
		AC_MSG_ERROR([pointers cannot be stored in ints, required for old code... stopping])
	fi
fi


AC_MSG_CHECKING([whether $CC supports -Wno-unused-parameter])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wno-unused-parameter"
AC_COMPILE_IFELSE(
	[int foo;],
	[AC_MSG_RESULT([yes])],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	]
)


#
# LTO Support test
#
if test "$enable_lto" != "no" ; then

	OLD_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -flto"

	OLD_LDFLAGS="$LDFLAGS"
	LDFLAGS="$LDFLAGS -flto"

	AC_MSG_CHECKING([whether $CC supports -flto])
	AC_RUN_IFELSE(
		[
			int main(int argc, char **argv){
               return 0;
           }
		],
		[
			AC_MSG_RESULT([yes])
		],
		[
			AC_MSG_RESULT([no])
			CFLAGS="$OLD_CFLAGS"
			LDFLAGS="$OLD_LDFLAGS"
		],
		[
			AC_MSG_RESULT([guessing no])
		]
	)
fi



AC_MSG_CHECKING([whether $CC supports -Wno-pointer-sign])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wno-pointer-sign"
AC_COMPILE_IFELSE(
	[int foo;],
	[
		AC_MSG_RESULT([yes])
		AC_MSG_CHECKING([whether $CC can actually use -Wno-pointer-sign])
		# This option causes warnings in C++ mode
		# Note: -Werror must be before -Wno-pointer-sign, otherwise it does not do anything
		CFLAGS="$OLD_CFLAGS -Werror -Wno-pointer-sign"
		AC_COMPILE_IFELSE(
			[int foo;],
			[
				AC_MSG_RESULT([yes])
				CFLAGS="$OLD_CFLAGS -Wno-pointer-sign"
			],
			[
				AC_MSG_RESULT([no])
				CFLAGS="$OLD_CFLAGS"
			]
		)
	],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	]
)


AC_MSG_CHECKING([whether $CC supports -Wno-switch])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wno-switch"
AC_COMPILE_IFELSE(
	[int foo;],
	[AC_MSG_RESULT([yes])],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	]
)


AC_MSG_CHECKING([whether $CC supports -fPIC])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fPIC"
AC_COMPILE_IFELSE(
	[int foo;],
	[
		AC_MSG_RESULT([yes])
		compiler_supports_pic="yes"
	],
	[
		AC_MSG_RESULT([no])
		compiler_supports_pic="no"
	]
)
CFLAGS="$OLD_CFLAGS"


#
# -shared needs position independent code; some platforms emit it
# always, others need -fPIC
#
AC_MSG_CHECKING([whether $CC needs -fPIC for shared objects])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -shared"
WITH_PLUGINS="yes"
AC_LINK_IFELSE(
	[
		int foo(void)
		{
			return 0;
		}
	],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	],
	[
		if test "$compiler_supports_pic" = "yes" ; then
			# Verify if -shared really fails due to lack of -fPIC or something else
			CFLAGS="$CFLAGS -fPIC"
			AC_LINK_IFELSE(
				[
					int foo(void)
					{
						return 0;
					}
				],
				[
					AC_MSG_RESULT([yes])
					CFLAGS="$OLD_CFLAGS -fPIC"
				],
				[
					AC_MSG_RESULT([no, but fails for another reason])
					AC_MSG_ERROR([compiler is unable to compile shared objects for an unhandled reason, please report this with attached config.log... stopping])
				]
			)
		else
			# Disable compilation of plugins (optional), so 'make all' does not fail
			AC_MSG_RESULT([yes, but unsupported])
			AC_MSG_NOTICE([compiler is unable to generate position independent code, disabled plugins (optional)])
			WITH_PLUGINS="no"
		fi
	]
)
AC_SUBST([WITH_PLUGINS])


#
# -O2 implies -fstrict-aliasing, but the code is not safe for that
#
AC_MSG_CHECKING([whether $CC supports -fno-strict-aliasing])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fno-strict-aliasing"
AC_COMPILE_IFELSE(
	[int foo;],
	[AC_MSG_RESULT([yes])],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	]
)


###############################################################################
# Check for libraries and header files.
#


#
# setrlimit - used to set the socket limit
#
AC_CHECK_FUNC([setrlimit],[CFLAGS="$CFLAGS -DHAVE_SETRLIMIT"])


#
# strnlen - string length with upper scan bound
#
AC_CHECK_FUNC([strnlen],[CFLAGS="$CFLAGS -DHAVE_STRNLEN"])

# libconfig
AC_CHECK_FUNCS([uselocale])
AC_CHECK_FUNCS([newlocale])
AC_CHECK_FUNCS([freelocale])
AC_CHECK_HEADERS([xlocale.h])

#
# Memory manager
#
case $enable_manager in
	"no")
		CFLAGS="$CFLAGS -DNO_MEMMGR"
		;;
	"builtin")
		# enabled by default
		;;
	"memwatch")
		CFLAGS="$CFLAGS -DMEMWATCH"
		AC_CHECK_HEADER([memwatch.h], , [AC_MSG_ERROR([memwatch header not found... stopping])])
		;;
	"dmalloc")
		CFLAGS="$CFLAGS -DDMALLOC -DDMALLOC_FUNC_CHECK"
		LIBS="$LIBS -ldmalloc"
		AC_CHECK_HEADER([dmalloc.h], , [AC_MSG_ERROR([dmalloc header not found... stopping])])
		;;
	"gcollect")
		CFLAGS="$CFLAGS -DGCOLLECT"
		LIBS="$LIBS -lgc"
		AC_CHECK_HEADER([gc.h], , [AC_MSG_ERROR([gcollect header not found... stopping])])
		;;
	"bcheck")
		CFLAGS="$CFLAGS -DBCHECK"
		;;
esac


#
# Packetver
#
if test -n "$enable_packetver" ; then
	CFLAGS="$CFLAGS -DPACKETVER=$enable_packetver"
fi


#
# Debug
#
case $enable_debug in
	"no")
		# default value
		CFLAGS="$CFLAGS -Wno-unused -Wno-parentheses"
		;;
	"yes")
		CFLAGS="$CFLAGS -g -DDEBUG"
		;;
	"gdb")
		CFLAGS="$CFLAGS -ggdb -DDEBUG"
		;;
esac

#
# Buildbot
#
case $enable_buildbot in
	"no")
		# default value
		;;
	"yes")
		CFLAGS="$CFLAGS -DBUILDBOT"
		;;
esac

#
# RDTSC
#
case $enable_rdtsc in
	0)
		#default value
		;;
	1)
		CFLAGS="$CFLAGS -DENABLE_RDTSC"
		;;
esac


#
# Profiler
#
case $enable_profiler in
	"no")
		# default value
		;;
	"gprof")
		CFLAGS="$CFLAGS -pg"
		LDFLAGS="$LDFLAGS -pg"
		;;
esac


#
# zlib library (required)
#
if test -n "${ZLIB_HOME}" ; then
	LDFLAGS="$LDFLAGS -L${ZLIB_HOME}/lib"
	CPPFLAGS="$CPPFLAGS -I${ZLIB_HOME}/include"
fi
AC_CHECK_LIB([z], [inflateEnd], [],[AC_MSG_ERROR([zlib library not found or incompatible, please specify the correct path with --with-zlib=DIR... stopping])])
AC_CHECK_HEADER([zlib.h], [], [AC_MSG_ERROR([zlib header not found, please specify the correct path with --with-zlib=DIR... stopping])])


#
# math library (required)
#
AC_SEARCH_LIBS([sqrt], [m], [], [AC_MSG_ERROR([math library not found... stopping])])


#
# clock_gettime (optional, rt on Debian)
#
AC_SEARCH_LIBS([clock_gettime], [rt])


#
# CLOCK_MONOTONIC clock for clock_gettime
# Normally defines _POSIX_TIMERS > 0 and _POSIX_MONOTONIC_CLOCK (for posix
# compliant systems) and __FreeBSD_cc_version >= 500005 (for FreeBSD
# >= 5.1.0, which does not have the posix defines (ref. r11983)) would be
# checked but some systems define them even when they do not support it
# (ref. bugreport:1003).
#
if test "$ac_cv_search_clock_gettime" != "no" ; then
	AC_MSG_CHECKING([whether CLOCK_MONOTONIC is supported and works])
	AC_RUN_IFELSE(
		[
			#include <sys/time.h>
			#include <time.h>
			#include <unistd.h>
			
			int main(int argc, char** argv)
			{
				struct timespec tval;
				return clock_gettime(CLOCK_MONOTONIC, &tval);
			}
		],
		[
			AC_MSG_RESULT([yes])
			CFLAGS="$CFLAGS -DHAVE_MONOTONIC_CLOCK"
		],
		[
			# either it failed to compile (CLOCK_MONOTONIC undefined)
			# or clock_gettime has returned a non-zero value
			AC_MSG_RESULT([no])
		],
		[
			AC_MSG_RESULT([guessing no])
		]
	)
fi


#
# MySQL library
#

if test -z "$MYSQL_CONFIG_HOME"; then
	AC_PATH_PROG([MYSQL_CONFIG_HOME], [mysql_config], [no])
fi

if test "$MYSQL_CONFIG_HOME" != "no" ; then
	MYSQL_VERSION="`$MYSQL_CONFIG_HOME --version`"
	if test "$manual_MYSQL_CFLAGS" = "no" ; then
		MYSQL_CFLAGS="`$MYSQL_CONFIG_HOME --include`"
	fi
	if test "$manual_MYSQL_LIBS" = "no" ; then
		MYSQL_LIBS="`$MYSQL_CONFIG_HOME --libs`"
	fi
else
	MYSQL_VERSION="unknown"
fi

MYSQL_OLD_LDFLAGS="$LDFLAGS" ; LDFLAGS="$LDFLAGS $MYSQL_LIBS"
MYSQL_OLD_CPPFLAGS="$CPPFLAGS" ; CPPFLAGS="$CPPFLAGS $MYSQL_CFLAGS"
AC_CHECK_LIB([mysqlclient], [mysql_init], [HAVE_MYSQL="yes"], [])
AC_CHECK_HEADER([mysql.h], [], [HAVE_MYSQL=""])
CPPFLAGS="$MYSQL_OLD_CPPFLAGS"
LDFLAGS="$MYSQL_OLD_LDFLAGS"

AC_MSG_CHECKING([MySQL library (required)])
if test "$HAVE_MYSQL" = "yes" ; then
	AC_MSG_RESULT([yes ($MYSQL_VERSION)])
else
	AC_MSG_RESULT([no])
	AC_MSG_ERROR([MySQL not found or incompatible])
fi

AC_SUBST([HAVE_MYSQL])
AC_SUBST([MYSQL_VERSION])
AC_SUBST([MYSQL_CFLAGS])
AC_SUBST([MYSQL_LIBS])


#
# PCRE library (optional)
#
##TODO PCRE version
PCRE_LIBS=""
PCRE_CFLAGS=""

if test "$want_pcre" = "no" ; then
	AC_MSG_NOTICE([ignoring PCRE (optional)])
else
	if test -z "$PCRE_HOME" ; then
		AC_CHECK_LIB([pcre], [pcre_study], [HAVE_PCRE="yes"], [])
		if test "$HAVE_PCRE" = "yes" ; then
			PCRE_LIBS="-lpcre"
		fi
	else
		PCRE_OLD_LDFLAGS="$LDFLAGS" ; LDFLAGS="$LDFLAGS -L$PCRE_HOME/lib"
		PCRE_OLD_CPPFLAGS="$CPPFLAGS" ; CPPFLAGS="$CPPFLAGS -I$PCRE_HOME/include"
		AC_CHECK_LIB(pcre, pcre_compile, [HAVE_PCRE="yes"], [])
		CPPFLAGS="$PCRE_OLD_CPPFLAGS"
		LDFLAGS="$PCRE_OLD_LDFLAGS"
		if test "$HAVE_PCRE" = "yes" ; then
			PCRE_LIBS="-L$PCRE_HOME/lib -lpcre"
			test -d "$PCRE_HOME/include" && PCRE_CFLAGS="-I$PCRE_HOME/include"
		fi
	fi
	AC_MSG_CHECKING([PCRE library (optional)])
	if test "$HAVE_PCRE" = "yes" ; then
		AC_MSG_RESULT([yes])
	else
		AC_MSG_RESULT([no])
		if test "$require_pcre" = "yes" ; then
			AC_MSG_ERROR([PCRE not found or incompatible (requested)])
		else
			AC_MSG_NOTICE([disabling PCRE (optional)])
		fi
	fi
fi

AC_SUBST([HAVE_PCRE])
AC_SUBST([PCRE_LIBS])
AC_SUBST([PCRE_CFLAGS])


#
# Host specific stuff
#
AC_MSG_CHECKING([host OS])
host_os="`uname`"
AC_MSG_RESULT([$host_os])
fd_setsize=""
DLLEXT=".so"
case $host_os in
Solaris* )
	LIBS="$LIBS -lsocket -lnsl -ldl"
	;;
Linux* )
	LIBS="$LIBS -ldl"
	;;
FreeBSD*)
	CPPFLAGS="$CPPFLAGS -D__FREEBSD__"
	;;
NetBSD*)
	CPPFLAGS="$CPPFLAGS -D__NETBSD__"
	;;
CYGWIN*)
	CPPFLAGS="$CPPFLAGS -DFD_SETSIZE=4096 -DCYGWIN"
	fd_setsize="done"
	DLLEXT=".dll"
	;;
esac
AC_SUBST([DLLEXT])

AC_MSG_CHECKING([for MinGW])
if test -n "`$CC --version | grep -i mingw`" ; then
	AC_MSG_RESULT([yes])
	CPPFLAGS="$CPPFLAGS -DMINGW"
	if test -z "$fd_setsize" ; then
		CPPFLAGS="$CPPFLAGS -DFD_SETSIZE=4096"
	fi
	LIBS="$LIBS -lws2_32"
else
	AC_MSG_RESULT([no])
fi



###############################################################################
AC_OUTPUT