summaryrefslogtreecommitdiffstats
path: root/configure.in
blob: 1566643bfaf9f06837ff1621d32c19077dea9361 (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
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
dnl Process this file with autoconf 2.0 or later to make a configure script.
AC_REVISION($Revision$)
AC_PREREQ(2.0)
AC_INIT(Include/object.h)
AC_CONFIG_HEADER(config.h)

# Set VERSION so we only need to edit in one place (i.e., here)
AC_SUBST(VERSION)
VERSION=2.0

# NEXTSTEP stuff
if test -f /usr/lib/NextStep/software_version -o -f /System/Library/CoreServices/software_version ; then

	AC_MSG_CHECKING(for --with-next-archs)
	AC_ARG_WITH(next-archs,
	 [  --with-next-archs='arch1 arch2 ..'   build MAB binary], [
		if test -n "$withval"; then
		    ac_arch_flags=`/usr/lib/arch_tool -archify_list $withval`
		    # GCC does not currently support multi archs on the NeXT
		    with_gcc=no
		fi
		AC_MSG_RESULT($with_next_archs)
	], [AC_MSG_RESULT(none: using `arch`)])
	
	if test -z "$MACHDEP"
	then
		set X `hostinfo | egrep '(NeXT Mach|Kernel Release).*:' | \
 			sed -e 's/://' -e 's/\./_/'` && \
			ac_sys_system=next && ac_sys_release=$4

		MACHDEP="$ac_sys_system$ac_sys_release"
	fi
fi

AC_ARG_WITH(next-framework,
[  --with-next-framework           Build (OpenStep|Rhapsody|MacOSX) framework],,)
AC_ARG_WITH(dyld,
[  --with-dyld                     Use (OpenStep|Rhapsody|MacOSX) dynamic linker],,)

# Set name for machine-dependent library files
AC_SUBST(MACHDEP)
AC_MSG_CHECKING(MACHDEP)
if test -z "$MACHDEP"
then
	ac_sys_system=`uname -s`
	if test "$ac_sys_system" = "AIX" ; then
		ac_sys_release=`uname -v`
	else
		ac_sys_release=`uname -r`
	fi
	ac_md_system=`echo $ac_sys_system |
			   tr -d '[/ ]' | tr '[[A-Z]]' '[[a-z]]'`
	ac_md_release=`echo $ac_sys_release |
			   tr -d '[/ ]' | sed 's/\..*//'`
	MACHDEP="$ac_md_system$ac_md_release"

	case $MACHDEP in
	'')	MACHDEP="unknown";;
	esac
fi

#
# SGI compilers allow the specification of the both the ABI and the
# ISA on the command line.  Depending on the values of these switches,
# different and often incompatable code will be generated.
#
# The SGI_ABI variable can be used to modify the CC and LDFLAGS and
# thus supply support for various ABI/ISA combinations.  The MACHDEP
# variable is also adjusted.
#
AC_SUBST(SGI_ABI)
if test ! -z "$SGI_ABI"
then
        CC="cc $SGI_ABI"
        LDFLAGS="$SGI_ABI $LDFLAGS"
        MACHDEP=`echo "${MACHDEP}${SGI_ABI}" | sed 's/ *//g'`
fi
AC_MSG_RESULT($MACHDEP)

#
# CCC is the command that compiles C++ programs
#
# Not all make programs have this predefined.
#
#AC_SUBST(SET_CCC)
#AC_MSG_CHECKING(CCC)
#if test -z "$CCC"
#then
#	case $ac_sys_system in
#	IRIX*)	SET_CCC="CCC= CC ${SGI_ABI}";;
#	Linux*) SET_CCC="CCC= g++";;
#	*)	SET_CCC=""
#	esac
#else
#        SET_CCC="CCC= ${CCC}"
#fi
#AC_MSG_RESULT($SET_CCC)


# checks for alternative programs
AC_MSG_CHECKING(for --without-gcc)
AC_ARG_WITH(gcc, [  --without-gcc                   never use gcc], [
	case $withval in
	no)	CC=cc
		without_gcc=yes;;
	yes)	CC=gcc
		without_gcc=no;;
	*)	CC=$withval
		without_gcc=$withval;;
	esac], [
	case $ac_sys_system in
	OSF1)	CC=cc
		without_gcc=;;
	BeOS*)
		# Dunno if it's a good idea to get this over with all at once, or
		# to handle it in with the other goodies.
		MACHDEP=beos

		case $BE_HOST_CPU in
		ppc)
			CC="mwcc -I$PWD/BeOS -nodup"
			without_gcc=yes
			case `uname -r` in
				4.0*) OPT="-DUSE_DL_EXPORT -O7 -opt schedule604 -export pragma" ;;
				*) OPT="-DUSE_DL_EXPORT -O2 -proc 604e -export pragma" ;;
			esac
			CCSHARED=-UUSE_DL_EXPORT
			LDFLAGS="$LDFLAGS -nodup"

			AR="$PWD/BeOS/ar-fake"
			RANLIB=:
			
			AC_DEFINE(DL_EXPORT_HEADER,"dl_export.h")
			;;
		x86)
			CC="gcc -I$PWD/BeOS"
			without_gcc=no
			OPT="-DUSE_DL_EXPORT -O"
			CCSHARED=-UUSE_DL_EXPORT

			AR="$PWD/BeOS/ar-fake"
			RANLIB=:
			
			AC_DEFINE(DL_EXPORT_HEADER,"dl_export.h")
			;;
		*)
			AC_ERROR(Your BeOS system isn't PowerPC or x86... neat, but this won't work...)
			;;
		esac
		;;
	*)	without_gcc=no;;
	esac])
AC_MSG_RESULT($without_gcc)

AC_SUBST(SET_CXX)
AC_SUBST(MAINOBJ)
MAINOBJ=python.o
AC_MSG_CHECKING(for --with-cxx=<compiler>)
AC_ARG_WITH(cxx, [  --with-cxx=<compiler>           enable C++ support],[
	case $withval in
	no)	CXX=
		with_cxx=no;;
	*)	CXX=$withval
		MAINOBJ=ccpython.o
		with_cxx=$withval;;
	esac], [
	with_cxx=no
])
AC_MSG_RESULT($with_cxx)
SET_CXX="CXX = $CXX"

#AC_MSG_CHECKING(CCC)
#if test -z "$CCC"
#then
#	case $ac_sys_system in
#	IRIX*)	SET_CCC="CCC= CC ${SGI_ABI}";;
#	Linux*) SET_CCC="CCC= g++";;
#	*)	SET_CCC=""
#	esac
#else
#        SET_CCC="CCC= ${CCC}"
#fi
#AC_MSG_RESULT($SET_CCC)

# If the user switches compilers, we can't believe the cache
if test ! -z "$ac_cv_prog_CC" -a ! -z "$CC" -a "$CC" != "$ac_cv_prog_CC"
then
  AC_ERROR(cached CC is different -- throw away $cache_file
(it is also a good idea to do 'make clean' before compiling))
fi

AC_PROG_CC

case $MACHDEP in
bsdos*)
    case $CC in
    gcc) CC="$CC -D_HAVE_BSDI";;
    esac;;
esac

case $ac_sys_system in
hp*|HP*)
    case $CC in
    cc|*/cc) CC="$CC -Aa -D_HPUX_SOURCE";;
    esac;;
BeOS*)
	case $CC in
	cc) CC=cc;;
	esac;;
esac

# LDLIBRARY is the name of the library to link against (as opposed to the
# name of the library into which to insert object files). On systems
# without shared libraries, LDLIBRARY is the same as LIBRARY (defined in
# the Makefiles). 
AC_SUBST(MAKE_LDLIBRARY)
AC_SUBST(LDLIBRARY)
LDLIBRARY=''

# LINKCC is the command that links the python executable -- default is $(CC).
# This is altered for AIX and BeOS in order to build the export list before 
# linking.
AC_SUBST(LINKCC)
AC_MSG_CHECKING(LINKCC)
if test -z "$LINKCC" -a ! -z "$CXX"
then
    LINKCC="$CXX"
fi
if test -z "$LINKCC"
then
	case $ac_sys_system in
	AIX*)
	   LINKCC="\$(srcdir)/makexp_aix python.exp \"\" \$(LIBRARY); \$(PURIFY) \$(CC)";;
	BeOS*)
	   LINKCC="\$(srcdir)/../BeOS/linkcc \$(LIBRARY) \$(PURIFY) \$(CC) \$(OPT)"
	   LDLIBRARY='libpython$(VERSION).so';;
	dgux*)
	   LINKCC="LD_RUN_PATH=$libdir \$(PURIFY) \$(CC)";;
	*) LINKCC="\$(PURIFY) \$(CC)";;
	esac
fi
AC_MSG_RESULT($LINKCC)

AC_MSG_CHECKING(LDLIBRARY)

# NeXT framework builds require that the 'ar' library be converted into
# a bundle using libtool.
if test "$with_next_framework"
then
  LDLIBRARY='libpython$(VERSION).dylib'
fi  

# DG/UX requires some fancy ld contortions to produce a .so from an .a
if test "$MACHDEP" = "dguxR4"
then
  LDLIBRARY='libpython$(VERSION).so'
  OPT="$OPT -pic"
fi
AC_MSG_RESULT($LDLIBRARY)

# If LDLIBRARY is different from LIBRARY, emit a rule to build it.
if test -z "$LDLIBRARY"
then
  LDLIBRARY='libpython$(VERSION).a'
  MAKE_LDLIBRARY="true"
else
  MAKE_LDLIBRARY='$(MAKE) $(LDLIBRARY)'
fi

AC_PROG_RANLIB
AC_SUBST(AR)
AC_CHECK_PROGS(AR, ar aal, ar)
AC_SUBST(INSTALL)
AC_SUBST(INSTALL_PROGRAM)
AC_SUBST(INSTALL_DATA)
# Install just never works :-(
if test -z "$INSTALL"
then
	INSTALL=cp
	INSTALL_PROGRAM=cp
	INSTALL_DATA=cp
else
	INSTALL_PROGRAM="$INSTALL"
	INSTALL_DATA="$INSTALL -m 644"
fi

# Not every filesystem supports hard links
AC_SUBST(LN)
if test -z "$LN" ; then
	case $ac_sys_system in
		BeOS*) LN="ln -s";;
		*) LN=ln;;
	esac
fi

# Optimizer/debugger flags passed between Makefiles
AC_SUBST(OPT)
if test -z "$OPT"
then
	case $GCC in
	yes)
		case $ac_cv_prog_cc_g in
		yes)	OPT="-g -O2";;
		*)	OPT="-O2";;
		esac
		;;
	*)	OPT="-O";;
	esac
fi

if test "$ac_arch_flags"
then
	OPT="$OPT $ac_arch_flags"
fi
# checks for UNIX variants that set C preprocessor variables
AC_AIX
AC_MINIX

AC_MSG_CHECKING(whether $CC accepts -OPT:Olimit=0)
AC_CACHE_VAL(ac_cv_opt_olimit_ok,
[ac_save_cc="$CC"
CC="$CC -OPT:Olimit=0"
AC_TRY_RUN([int main() { return 0; }],
  ac_cv_opt_olimit_ok=yes,
  ac_cv_opt_olimit_ok=no)
CC="$ac_save_cc"])
AC_MSG_RESULT($ac_cv_opt_olimit_ok)
if test $ac_cv_opt_olimit_ok = yes; then
  OPT="$OPT -OPT:Olimit=0"
else
  AC_MSG_CHECKING(whether $CC accepts -Olimit 1500)
  AC_CACHE_VAL(ac_cv_olimit_ok,
  [ac_save_cc="$CC"
  CC="$CC -Olimit 1500"
  AC_TRY_RUN([int main() { return 0; }],
    ac_cv_olimit_ok=yes,
    ac_cv_olimit_ok=no)
  CC="$ac_save_cc"])
  AC_MSG_RESULT($ac_cv_olimit_ok)
  if test $ac_cv_olimit_ok = yes; then
    OPT="$OPT -Olimit 1500"
  fi
fi

dnl # check for ANSI or K&R ("traditional") preprocessor
dnl AC_MSG_CHECKING(for C preprocessor type)
dnl AC_TRY_COMPILE([
dnl #define spam(name, doc) {#name, &name, #name "() -- " doc}
dnl int foo;
dnl struct {char *name; int *addr; char *doc;} desc = spam(foo, "something");
dnl ], [;], cpp_type=ansi, AC_DEFINE(HAVE_OLD_CPP) cpp_type=traditional)
dnl AC_MSG_RESULT($cpp_type)

# checks for header files
AC_HEADER_STDC
AC_CHECK_HEADERS(dlfcn.h fcntl.h limits.h locale.h ncurses.h pthread.h \
signal.h stdarg.h stddef.h stdlib.h thread.h unistd.h utime.h \
sys/audioio.h sys/file.h sys/lock.h \
sys/param.h sys/select.h sys/socket.h sys/time.h sys/times.h \
sys/un.h sys/utsname.h sys/wait.h pty.h libutil.h)
AC_HEADER_DIRENT

# checks for typedefs
was_it_defined=no
AC_MSG_CHECKING(for clock_t in time.h)
AC_EGREP_HEADER(clock_t, time.h, was_it_defined=yes, AC_DEFINE(clock_t, long))
AC_MSG_RESULT($was_it_defined)

# Add some code to confdefs.h so that the test for off_t works on SCO
cat >> confdefs.h <<\EOF
#if defined(SCO_DS)
#undef _OFF_T
#endif
EOF

# Type availability checks
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_TYPE_UID_T

# Sizes of various common basic types
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(char)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(float)
AC_CHECK_SIZEOF(double)
AC_CHECK_SIZEOF(fpos_t)

AC_MSG_CHECKING(for long long support)
have_long_long=no
AC_TRY_COMPILE([], [long long x; x = (long long)0;], AC_DEFINE(HAVE_LONG_LONG) have_long_long=yes)
AC_MSG_RESULT($have_long_long)
if test "$have_long_long" = yes ; then
AC_CHECK_SIZEOF(long long)
fi

# Hmph. AC_CHECK_SIZEOF() doesn't include <sys/types.h>.
AC_MSG_CHECKING(size of off_t)
AC_CACHE_VAL(ac_cv_sizeof_off_t,
[AC_TRY_RUN([#include <stdio.h>
#include <sys/types.h>
main()
{
  FILE *f=fopen("conftestval", "w");
  if (!f) exit(1);
  fprintf(f, "%d\n", sizeof(off_t));
  exit(0);
}], ac_cv_sizeof_off_t=`cat conftestval`, ac_cv_sizeof_off_t=0)
])
AC_MSG_RESULT($ac_cv_sizeof_off_t)
AC_DEFINE_UNQUOTED(SIZEOF_OFF_T, $ac_cv_sizeof_off_t)

AC_MSG_CHECKING(whether to enable large file support)
if test "$have_long_long" = yes -a \
	"$ac_cv_sizeof_off_t" -gt "$ac_cv_sizeof_long" -a \
	"$ac_cv_sizeof_long_long" -ge "$ac_cv_sizeof_off_t"; then
  AC_DEFINE(HAVE_LARGEFILE_SUPPORT)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

# AC_CHECK_SIZEOF() doesn't include <time.h>.
AC_MSG_CHECKING(size of time_t)
AC_CACHE_VAL(ac_cv_sizeof_time_t,
[AC_TRY_RUN([#include <stdio.h>
#include <time.h>
main()
{
  FILE *f=fopen("conftestval", "w");
  if (!f) exit(1);
  fprintf(f, "%d\n", sizeof(time_t));
  exit(0);
}], ac_cv_sizeof_time_t=`cat conftestval`, ac_cv_sizeof_time_t=0)
])
AC_MSG_RESULT($ac_cv_sizeof_time_t)
AC_DEFINE_UNQUOTED(SIZEOF_TIME_T, $ac_cv_sizeof_time_t)


# Minor variations in building a framework between NextStep versions 4 and 5
AC_SUBST(LIBTOOL_CRUFT)
case $ac_sys_system/$ac_sys_release in
  next/4*)
    ns_undef_sym='__environ'
    LIBTOOL_CRUFT="-U $ns_undef_sym" ;;
  next/5*)
    ns_undef_sym='_environ'
    LIBTOOL_CRUFT="-lcc_dynamic -U $ns_undef_sym" ;;
esac

AC_MSG_CHECKING(for --with-next-framework)
if test "$with_next_framework"
then
	OPT="$OPT -fno-common"
	# -U __environ is needed since bundles don't have access
	# to crt0 when built but will always be linked against it
	LDFLAGS="$LDFLAGS -Wl,-U,$ns_undef_sym"
	AC_DEFINE(WITH_NEXT_FRAMEWORK)
	AC_MSG_RESULT(yes)
else
	AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING(for --with-dyld)
if test "$with_next_framework" -o "$with_dyld"
then
	if test "$with_dyld"
	then
		AC_MSG_RESULT(yes)
	else
		AC_MSG_RESULT(required for framework build)
	fi
	AC_DEFINE(WITH_DYLD)
	ns_dyld='set'
else
	AC_MSG_RESULT(no)
fi

# Set info about shared libraries.
AC_SUBST(SO)
AC_SUBST(LDSHARED)
AC_SUBST(CCSHARED)
AC_SUBST(LINKFORSHARED)
# SO is the extension of shared libraries `(including the dot!)
# -- usually .so, .sl on HP-UX
AC_MSG_CHECKING(SO)
if test -z "$SO"
then
	case $ac_sys_system in
	hp*|HP*)   SO=.sl;;
	*)	   SO=.so;;
	esac
fi
AC_MSG_RESULT($SO)
# LDSHARED is the ld *command* used to create shared library
# -- "ld" on SunOS 4.x.x, "ld -G" on SunOS 5.x, "ld -shared" on IRIX 5
# (Shared libraries in this instance are shared modules to be loaded into
# Python, as opposed to building Python itself as a shared library.)
AC_MSG_CHECKING(LDSHARED)
if test -z "$LDSHARED"
then
	case $ac_sys_system/$ac_sys_release in
	AIX*) LDSHARED="\$(srcdir)/ld_so_aix \$(CC)";;
	BeOS*) LDSHARED="\$(srcdir)/../BeOS/linkmodule -L.. -lpython\$(VERSION)";;
	IRIX/5*) LDSHARED="ld -shared";;
	IRIX*/6*) LDSHARED="ld ${SGI_ABI} -shared -all";;
	SunOS/4*) LDSHARED="ld";;
	SunOS/5*) 
		if test "$GCC" = "yes"
		then LDSHARED='$(CC) -G'
		else LDSHARED="ld -G";
		fi ;;
	hp*|HP*) LDSHARED="ld -b";;
	OSF*) LDSHARED="ld -shared -expect_unresolved \"*\"";;
	DYNIX/ptx*) LDSHARED="ld -G";;
	next/*) 
		if test "$ns_dyld"
		then LDSHARED='$(CC) $(LDFLAGS) -bundle -prebind'
		else LDSHARED='$(CC) $(CFLAGS) -nostdlib -r';
		fi
                if test "$with_next_framework" ; then
		    LDSHARED="$LDSHARED \$(LDLIBRARY)"
		fi ;;
	Linux*) LDSHARED="gcc -shared";;
	dgux*) LDSHARED="ld -G";;
	BSD/OS*/4*) LDSHARED="gcc -shared";;
	FreeBSD*/[[34]]*) LDSHARED="gcc -shared";;
	FreeBSD*|OpenBSD*) LDSHARED="ld -Bshareable";;
	NetBSD*)
		if [[ "`$CC -dM -E - </dev/null | grep __ELF__`" != "" ]]
		then
			LDSHARED="cc -shared"
		else
			LDSHARED="ld -Bshareable"
		fi;;
	SCO_SV*) LDSHARED="cc -G -KPIC -Ki486 -belf -Wl,-Bexport";;
	*)	LDSHARED="ld";;
	esac
fi
AC_MSG_RESULT($LDSHARED)
# CCSHARED are the C *flags* used to create objects to go into a shared
# library (module) -- this is only needed for a few systems
AC_MSG_CHECKING(CCSHARED)
if test -z "$CCSHARED"
then
	case $ac_sys_system/$ac_sys_release in
	hp*|HP*) if test "$GCC" = yes;
		 then CCSHARED="-fpic";
		 else CCSHARED="+z";
		 fi;;
	Linux*) CCSHARED="-fpic";;
	BSD/OS*/4*) CCSHARED="-fpic";;
	FreeBSD*|OpenBSD*) CCSHARED="-fpic";;
	NetBSD*) CCSHARED="-fPIC";;
	SCO_SV*) CCSHARED="-KPIC -dy -Bdynamic";;
	IRIX*/6*)  case $CC in
		   *gcc*) CCSHARED="-shared";;
		   *) CCSHARED="";;
		   esac;;
	esac
fi
AC_MSG_RESULT($CCSHARED)
# LINKFORSHARED are the flags passed to the $(CC) command that links
# the python executable -- this is only needed for a few systems
AC_MSG_CHECKING(LINKFORSHARED)
if test -z "$LINKFORSHARED"
then
	case $ac_sys_system/$ac_sys_release in
	AIX*)	LINKFORSHARED='-Wl,-bE:python.exp -lld';;
	hp*|HP*)
	    LINKFORSHARED="-Wl,-E -Wl,+s -Wl,+b\$(BINLIBDEST)/lib-dynload";;
	BSD/OS/4*) LINKFORSHARED="-Xlinker -export-dynamic";;
	FreeBSD/[[34]]*) LINKFORSHARED="-Xlinker -export-dynamic";;
	Linux*) LINKFORSHARED="-Xlinker -export-dynamic";;
	# -u libsys_s pulls in all symbols in libsys
	next/2*|next/3*) LINKFORSHARED="-u libsys_s";;
	# -u __dummy makes the linker aware of the objc runtime
	# in System.framework; otherwise, __objcInit (referenced in
	# crt1.o) gets erroneously defined as common, which breaks dynamic
	# loading of any modules which reference it in System.framework
	next/4*|next/5*) LINKFORSHARED="-u __dummy -framework System" ;;
	SCO_SV*) LINKFORSHARED="-Bdynamic -dy -Wl,-Bexport";;
	NetBSD*) 
		if [[ "`$CC -dM -E - </dev/null | grep __ELF__`" != "" ]]
		then
			LINKFORSHARED="-Wl,--export-dynamic"
		fi;;
	SunOS/5*) case $CC in
		  *gcc*)
		    if $CC -Xlinker -V 2>&1 | grep BFD >/dev/null
		    then
			LINKFORSHARED="-Xlinker --export-dynamic"
		    fi;;
		  esac;;
	esac
fi
AC_MSG_RESULT($LINKFORSHARED)

# checks for libraries
AC_CHECK_LIB(dl, dlopen)	# Dynamic linking for SunOS/Solaris and SYSV
AC_CHECK_LIB(dld, shl_load)	# Dynamic linking for HP-UX

# checks for system dependent C++ extensions support
case "$ac_sys_system" in
	AIX*)	AC_MSG_CHECKING(for genuine AIX C++ extensions support)
		AC_TRY_LINK([#include "/usr/lpp/xlC/include/load.h"],
			    [loadAndInit("", 0, "")],
			    [AC_DEFINE(AIX_GENUINE_CPLUSPLUS)
			     AC_MSG_RESULT(yes)],
			    [AC_MSG_RESULT(no)]);;
	*) ;;
esac

# Most SVR4 platforms (e.g. Solaris) need -lsocket and -lnsl.
# However on SGI IRIX, these exist but are broken.
# BeOS' sockets are stashed in libnet.
case "$ac_sys_system" in
IRIX*) ;;
*)
AC_CHECK_LIB(nsl, t_open, [LIBS="-lnsl $LIBS"]) # SVR4
AC_CHECK_LIB(socket, socket, [LIBS="-lsocket $LIBS"], [], $LIBS) # SVR4 sockets
;;
esac
case "$ac_sys_system" in
BeOS*)
AC_CHECK_LIB(net, socket, [LIBS="-lnet $LIBS"], [], $LIBS) # BeOS
;;
esac

AC_MSG_CHECKING(for --with-libs)
AC_ARG_WITH(libs,
[  --with-libs='lib1 ...'          link against additional libs], [
AC_MSG_RESULT($withval)
LIBS="$withval $LIBS"
], AC_MSG_RESULT(no))

AC_MSG_CHECKING(for --with(out)-readline)
AC_ARG_WITH(readline,
[  --with(out)-readline            obsolete, edit Modules/Setup instead],
[AC_MSG_RESULT($withval)
AC_ERROR(--with(out)-readline is obsolete, edit Modules/Setup instead)],
[AC_MSG_RESULT(not specified.)])

AC_SUBST(USE_THREAD_MODULE)
USE_THREAD_MODULE=""

AC_MSG_CHECKING(for --with-dec-threads)
AC_SUBST(LDLAST)
AC_ARG_WITH(dec-threads,
[  --with-dec-threads              use DEC Alpha/OSF1 thread-safe libraries], [
AC_MSG_RESULT($withval)
LDLAST=-threads
if test "${with_thread+set}" != set; then
   with_thread="$withval";
fi],
AC_MSG_RESULT(no))

AC_MSG_CHECKING(for --with-threads)
AC_ARG_WITH(threads,
[  --with(out)-threads[=DIRECTORY] disable/enable thread support])

# --with-thread is deprecated, but check for it anyway
AC_ARG_WITH(thread,
[  --with(out)-thread[=DIRECTORY]  deprecated; use --with(out)-threads],[
with_threads=$with_thread])

if test -z "$with_threads"
then with_threads="yes"
fi
AC_MSG_RESULT($with_threads)

if test "$with_threads" = "no"
then
    USE_THREAD_MODULE="#"
else
    if test -d "$with_threads"
    then LDFLAGS="$LDFLAGS -L$with_threads"
    fi
    if test -d "$withval"
    then LDFLAGS="$LDFLAGS -L$withval"
    fi
    AC_DEFINE(_REENTRANT)
    AC_CHECK_HEADER(mach/cthreads.h, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(C_THREADS)
    LIBOBJS="$LIBOBJS thread.o"],[
    AC_CHECK_LIB(pthread, pthread_create, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(_POSIX_THREADS)
    LIBS="-lpthread $LIBS"
    LIBOBJS="$LIBOBJS thread.o"],[
    AC_CHECK_FUNC(pthread_detach, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(_POSIX_THREADS)
    LIBOBJS="$LIBOBJS thread.o"],[
    AC_CHECK_HEADER(kernel/OS.h, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(BEOS_THREADS)
    LIBOBJS="$LIBOBJS thread.o"],[
    AC_CHECK_LIB(pthreads, pthread_create, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(_POSIX_THREADS)
    LIBS="$LIBS -lpthreads"
    LIBOBJS="$LIBOBJS thread.o"], [
    AC_CHECK_LIB(c_r, pthread_create, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(_POSIX_THREADS)
    LIBS="$LIBS -lc_r"
    LIBOBJS="$LIBOBJS thread.o"], [
    AC_CHECK_LIB(thread, __d6_pthread_create, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(_POSIX_THREADS)
    LIBS="$LIBS -lthread"
    LIBOBJS="$LIBOBJS thread.o"], [
    AC_CHECK_LIB(pth, pth_init, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(_GNU_PTH)
    LIBS="-lpth $LIBS"
    LIBOBJS="$LIBOBJS thread.o"],[
    AC_CHECK_LIB(cma, pthread_create, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(_POSIX_THREADS)
    LIBS="$LIBS -lcma"
    LIBOBJS="$LIBOBJS thread.o"])
    ])])])])])])])])

    AC_CHECK_LIB(mpc, usconfig, [AC_DEFINE(WITH_THREAD)
    LIBS="$LIBS -lmpc"
    LIBOBJS="$LIBOBJS thread.o"])
    AC_CHECK_LIB(thread, thr_create, [AC_DEFINE(WITH_THREAD)
    LIBS="$LIBS -lthread"
    LIBOBJS="$LIBOBJS thread.o"])
fi

# Check for GC support
AC_SUBST(USE_GC_MODULE)
USE_GC_MODULE=""
AC_MSG_CHECKING(for --with-cycle-gc)
AC_ARG_WITH(cycle-gc,
[  --with(out)-cycle-gc            disable/enable garbage collection])

if test -z "$with_cycle_gc"
then with_cycle_gc="yes"
fi
if test "$with_cycle_gc" = "no"
then
    USE_GC_MODULE="#"
else
    AC_DEFINE(WITH_CYCLE_GC)
fi
AC_MSG_RESULT($with_cycle_gc)

# Check for --with-wctype-functions
AC_MSG_CHECKING(for --with-wctype-functions)
AC_ARG_WITH(wctype-functions, 
[  --with-wctype-functions         use wctype.h functions], [
if test "$withval" != no
then AC_DEFINE(WANT_WCTYPE_FUNCTIONS) AC_MSG_RESULT(yes)
else AC_MSG_RESULT(no)
fi],
[AC_MSG_RESULT(no)])

# -I${DLINCLDIR} is added to the compile rule for importdl.o
AC_SUBST(DLINCLDIR)
DLINCLDIR=/

AC_MSG_CHECKING(for --with-sgi-dl)
AC_ARG_WITH(sgi-dl,
[  --with-sgi-dl=DIRECTORY         IRIX 4 dynamic linking], [
AC_MSG_RESULT($withval)
AC_DEFINE(WITH_SGI_DL)
DYNLOADFILE="dynload_dl.o"
dldir=$withval
if test -d "$dldir"
then LDFLAGS="$LDFLAGS -L$dldir"
else AC_ERROR(proper usage is --with-sgi-dl=DIRECTORY)
fi
DLINCLDIR=${dldir}
LIBS="$LIBS -ldl -lmld"], AC_MSG_RESULT(no))

AC_MSG_CHECKING(for --with-dl-dld)
AC_ARG_WITH(dl-dld, [  --with-dl-dld=DL_DIR,DLD_DIR    GNU dynamic linking], [
AC_MSG_RESULT($withval)
AC_DEFINE(WITH_DL_DLD)
DYNLOADFILE="dynload_dl.o"
dldir=`echo "$withval" | sed 's/,.*//'`
dlddir=`echo "$withval" | sed 's/.*,//'`
if test -d "$dldir" -a -d "$dlddir"
then LDFLAGS="$LDFLAGS -L$dldir -L$dlddir"
else AC_ERROR(proper usage is --with-dl-dld=DL_DIRECTORY,DLD_DIRECTORY)
fi
DLINCLDIR=${dldir}
LIBS="$LIBS -ldl -ldld"], AC_MSG_RESULT(no))

# the dlopen() function means we might want to use dynload_shlib.o. some
# platforms, such as AIX, have dlopen(), but don't want to use it.
AC_CHECK_FUNCS(dlopen)

# DYNLOADFILE specifies which dynload_*.o file we will use for dynamic
# loading of modules.
AC_SUBST(DYNLOADFILE)
AC_MSG_CHECKING(DYNLOADFILE)
if test -z "$DYNLOADFILE"
then
	case $ac_sys_system/$ac_sys_release in
	AIX*) DYNLOADFILE="dynload_aix.o";;
	BeOS*) DYNLOADFILE="dynload_beos.o";;
	hp*|HP*) DYNLOADFILE="dynload_hpux.o";;
	next/*) DYNLOADFILE="dynload_next.o";;
	*)
	# use dynload_shlib.c and dlopen() if we have it; otherwise stub
	# out any dynamic loading
	if test "$ac_cv_func_dlopen" = yes
	then DYNLOADFILE="dynload_shlib.o"
	else DYNLOADFILE="dynload_stub.o"
	fi
	;;
	esac
fi
AC_MSG_RESULT($DYNLOADFILE)
if test "$DYNLOADFILE" != "dynload_stub.o"
then
	AC_DEFINE(HAVE_DYNAMIC_LOADING)
fi

# checks for library functions
AC_CHECK_FUNCS(alarm chown clock confstr ctermid ctermid_r execv \
 flock fork fsync fdatasync fpathconf ftime ftruncate \
 getgroups getlogin getpeername getpid getpwent getwd \
 kill link lstat mkfifo mktime mremap \
 nice pathconf pause plock pthread_init \
 putenv readlink \
 select setegid seteuid setgid \
 setlocale setregid setreuid setsid setpgid setuid setvbuf \
 sigaction siginterrupt sigrelse strftime strptime symlink sysconf \
 tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
 truncate uname waitpid _getpty)

# check for openpty and forkpty

AC_CHECK_FUNCS(openpty,, AC_CHECK_LIB(util,openpty, [AC_DEFINE(HAVE_OPENPTY)] [LIBS="$LIBS -lutil"]))
AC_CHECK_FUNCS(forkpty,, AC_CHECK_LIB(util,forkpty, [AC_DEFINE(HAVE_FORKPTY)] [LIBS="$LIBS -lutil"]))

# check for long file support functions
AC_CHECK_FUNCS(fseek64 fseeko fstatvfs ftell64 ftello statvfs)

AC_REPLACE_FUNCS(dup2 getcwd strdup strerror memmove)
AC_CHECK_FUNCS(getpgrp, AC_TRY_COMPILE([#include <unistd.h>], [getpgrp(0);], AC_DEFINE(GETPGRP_HAVE_ARG)))
AC_CHECK_FUNCS(setpgrp, AC_TRY_COMPILE([#include <unistd.h>], [setpgrp(0,0);], AC_DEFINE(SETPGRP_HAVE_ARG)))
AC_CHECK_FUNCS(gettimeofday, AC_TRY_COMPILE([#include <sys/time.h>], [gettimeofday((struct timeval*)0,(struct timezone*)0);], ,AC_DEFINE(GETTIMEOFDAY_NO_TZ)))

# checks for structures
AC_HEADER_TIME
AC_STRUCT_TM
AC_STRUCT_TIMEZONE

AC_MSG_CHECKING(for time.h that defines altzone)
AC_CACHE_VAL(ac_cv_header_time_altzone,
[AC_TRY_COMPILE([#include <time.h>], [return altzone;],
  ac_cv_header_time_altzone=yes,
  ac_cv_header_time_altzone=no)])
AC_MSG_RESULT($ac_cv_header_time_altzone)
if test $ac_cv_header_time_altzone = yes; then
  AC_DEFINE(HAVE_ALTZONE)
fi

was_it_defined=no
AC_MSG_CHECKING(whether sys/select.h and sys/time.h may both be included)
AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/select.h>
#include <sys/time.h>
], [;], [AC_DEFINE(SYS_SELECT_WITH_SYS_TIME) was_it_defined=yes])
AC_MSG_RESULT($was_it_defined)

# checks for compiler characteristics

AC_C_CHAR_UNSIGNED
AC_C_CONST
AC_C_INLINE

works=no
AC_MSG_CHECKING(for working volatile)
AC_TRY_COMPILE([],[volatile int x; x = 0;], works=yes, AC_DEFINE(volatile, []))
AC_MSG_RESULT($works)

works=no
AC_MSG_CHECKING(for working signed char)
AC_TRY_COMPILE([], [signed char c;], works=yes, AC_DEFINE(signed, []))
AC_MSG_RESULT($works)

have_prototypes=no
AC_MSG_CHECKING(for prototypes)
AC_TRY_COMPILE([int foo(int x) { return 0; }], [return foo(10);],
AC_DEFINE(HAVE_PROTOTYPES) have_prototypes=yes)
AC_MSG_RESULT($have_prototypes)

works=no
AC_MSG_CHECKING(for variable length prototypes and stdarg.h)
AC_TRY_COMPILE([
#include <stdarg.h>
int foo(int x, ...) {
	va_list va;
	va_start(va, x);
	va_arg(va, int);
	va_arg(va, char *);
	va_arg(va, double);
	return 0;
}
], [return foo(10, "", 3.14);],
AC_DEFINE(HAVE_STDARG_PROTOTYPES) works=yes)
AC_MSG_RESULT($works)

if test "$have_prototypes" = yes; then
bad_prototypes=no
AC_MSG_CHECKING(for bad exec* prototypes)
AC_TRY_COMPILE([#include <unistd.h>], [char **t;execve("@",t,t);], ,
	AC_DEFINE(BAD_EXEC_PROTOTYPES) bad_prototypes=yes)
AC_MSG_RESULT($bad_prototypes)
fi

bad_forward=no
AC_MSG_CHECKING(for bad static forward)
AC_TRY_RUN([
struct s { int a; int b; };
static struct s foo;
int foobar() {
 static int random;
 random = (int) &foo;
 return random;
}
static struct s foo = { 1, 2 };
main() {
 exit(!((int)&foo == foobar()));
}
], , AC_DEFINE(BAD_STATIC_FORWARD) bad_forward=yes)
AC_MSG_RESULT($bad_forward)

va_list_is_array=no
AC_MSG_CHECKING(whether va_list is an array)
AC_TRY_COMPILE([
#ifdef HAVE_STDARG_PROTOTYPES
#include <stdarg.h>
#else
#include <varargs.h>
#endif
], [va_list list1, list2; list1 = list2;], , 
AC_DEFINE(VA_LIST_IS_ARRAY) va_list_is_array=yes)
AC_MSG_RESULT($va_list_is_array)

# sigh -- gethostbyname_r is a mess; it can have 3, 5 or 6 arguments :-(
AC_CHECK_FUNC(gethostbyname_r, [
  AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  AC_MSG_CHECKING([gethostbyname_r with 6 args])
  OLD_CFLAGS=$CFLAGS
  CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  AC_TRY_COMPILE([
#   include <netdb.h>
  ], [
    char *name;
    struct hostent *he, *res;
    char buffer[2048];
    int buflen = 2048;
    int h_errnop;

    (void) gethostbyname_r(name, he, buffer, buflen, &res, &h_errnop)
  ], [
    AC_DEFINE(HAVE_GETHOSTBYNAME_R)
    AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG)
    AC_MSG_RESULT(yes)
  ], [
    AC_MSG_RESULT(no)
    AC_MSG_CHECKING([gethostbyname_r with 5 args])
    AC_TRY_COMPILE([
#     include <netdb.h>
    ], [
      char *name;
      struct hostent *he;
      char buffer[2048];
      int buflen = 2048;
      int h_errnop;

      (void) gethostbyname_r(name, he, buffer, buflen, &h_errnop)
    ], [
      AC_DEFINE(HAVE_GETHOSTBYNAME_R)
      AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG)
      AC_MSG_RESULT(yes)
    ], [
      AC_MSG_RESULT(no)
      AC_MSG_CHECKING([gethostbyname_r with 3 args])
      AC_TRY_COMPILE([
#       include <netdb.h>
      ], [
        char *name;
        struct hostent *he;
        struct hostent_data data;

        (void) gethostbyname_r(name, he, &data);
      ], [
        AC_DEFINE(HAVE_GETHOSTBYNAME_R)
        AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG)
        AC_MSG_RESULT(yes)
      ], [
        AC_MSG_RESULT(no)
      ])
    ])
  ])
  CFLAGS=$OLD_CFLAGS
], [
  AC_CHECK_FUNCS(gethostbyname)
])
AC_SUBST(HAVE_GETHOSTBYNAME_R_6_ARG)
AC_SUBST(HAVE_GETHOSTBYNAME_R_5_ARG)
AC_SUBST(HAVE_GETHOSTBYNAME_R_3_ARG)
AC_SUBST(HAVE_GETHOSTBYNAME_R)
AC_SUBST(HAVE_GETHOSTBYNAME)

# checks for system services
# (none yet)

# Cope with the DB mess.  If we detect libdba, assume it's a version 2
# or later DB and should be linked first (before the DB 1.xx stuff in glibc).
# Also define an appropriate symbol so we can conditionalize code in the
# dbmmodule; the API has changed since 1.xx.
AC_CHECK_LIB(dba, __db_mutex_lock)

# Linux requires this for correct f.p. operations
AC_CHECK_FUNC(__fpu_control,
  [],
  [AC_CHECK_LIB(ieee, __fpu_control)
])

# Check for --with-fpectl
AC_MSG_CHECKING(for --with-fpectl)
AC_ARG_WITH(fpectl,
[  --with-fpectl                   enable SIGFPE catching], [
if test "$withval" != no
then AC_DEFINE(WANT_SIGFPE_HANDLER) AC_MSG_RESULT(yes)
else AC_MSG_RESULT(no)
fi],
[AC_MSG_RESULT(no)])

# check for --with-libm=...
AC_SUBST(LIBM)
case $ac_sys_system in
next) ;;
BeOS) ;;
*) LIBM=-lm
esac
AC_MSG_CHECKING(for --with-libm=STRING)
AC_ARG_WITH(libm, [  --with-libm=STRING              math library], [
if test "$withval" = no
then LIBM=
     AC_MSG_RESULT(force LIBM empty)
elif test "$withval" != yes
then LIBM=$withval
     AC_MSG_RESULT(set LIBM=\"$withval\")
else AC_ERROR(proper usage is --with-libm=STRING)
fi],
[AC_MSG_RESULT(default LIBM=\"$LIBM\")])

# check for --with-libc=...
AC_SUBST(LIBC)
AC_MSG_CHECKING(for --with-libc=STRING)
AC_ARG_WITH(libc, [  --with-libc=STRING              C library], [
if test "$withval" = no
then LIBC=
     AC_MSG_RESULT(force LIBC empty)
elif test "$withval" != yes
then LIBC=$withval
     AC_MSG_RESULT(set LIBC=\"$withval\")
else AC_ERROR(proper usage is --with-libc=STRING)
fi],
[AC_MSG_RESULT(default LIBC=\"$LIBC\")])

# check for hypot() in math library
LIBS_SAVE=$LIBS
LIBS="$LIBS $LIBM"
AC_REPLACE_FUNCS(hypot)
LIBS=$LIBS_SAVE

# check for rint() in math library
LIBS_SAVE=$LIBS
LIBS="$LIBS $LIBM"
AC_CHECK_FUNCS(rint)
LIBS=$LIBS_SAVE

# check for getopt
AC_MSG_CHECKING(for genuine getopt)
AC_CACHE_VAL(ac_cv_func_getopt,
[AC_TRY_RUN([#include <stdio.h>
extern int optind, opterr, getopt();
extern char* optarg;
int main() {
	char* av[] = { "testprog", "parameter", "-fFlag", NULL };
	opterr = 0;
	if (getopt(3, av, "f:") == 'f') { exit(1); }
	exit(0);
}], ac_cv_func_getopt=yes, ac_cv_func_getopt=no, ac_cv_func_getopt=no)])dnl
AC_MSG_RESULT($ac_cv_func_getopt)
test $ac_cv_func_getopt = no && LIBOBJS="$LIBOBJS getopt.o"
AC_SUBST(LIBOBJS)dnl

# check whether malloc(0) returns NULL or not
AC_MSG_CHECKING(what malloc(0) returns)
AC_CACHE_VAL(ac_cv_malloc_zero,
[AC_TRY_RUN([#include <stdio.h>
#ifdef HAVE_STDLIB
#include <stdlib.h>
#else
char *malloc(), *realloc();
int *free();
#endif
main() {
	char *p;
	p = malloc(0);
	if (p == NULL) exit(1);
	p = realloc(p, 0);
	if (p == NULL) exit(1);
	free(p);
	exit(0);
}], ac_cv_malloc_zero=nonnull, ac_cv_malloc_zero=null)])
AC_MSG_RESULT($ac_cv_malloc_zero)
if test "$ac_cv_malloc_zero" = null
then
  AC_DEFINE(MALLOC_ZERO_RETURNS_NULL)
fi

# check for wchar.h
AC_CHECK_HEADER(wchar.h,
AC_DEFINE(HAVE_WCHAR_H) wchar_h="yes",
wchar_h="no"
)

# check for usable wchar_t
usable_wchar_t="unkown"
AC_MSG_CHECKING(for usable wchar_t)
AC_TRY_RUN([
#include "wchar.h"
#include "wctype.h"
main() {
 wchar_t s;
 if (sizeof(s) == 2)
  exit(0);
 else
  exit(1);
}
], 
AC_DEFINE(HAVE_USABLE_WCHAR_T) usable_wchar_t="yes",
usable_wchar_t="no")
AC_MSG_RESULT($usable_wchar_t)

# check for endianness
AC_C_BIGENDIAN

# Check whether right shifting a negative integer extends the sign bit
# or fills with zeros (like the Cray J90, according to Tim Peters).
AC_MSG_CHECKING(whether right shift extends the sign bit)
AC_CACHE_VAL(ac_cv_rshift_extends_sign, [
AC_TRY_RUN([
int main()
{
	exit(((-1)>>3 == -1) ? 0 : 1);
}
], ac_cv_rshift_extends_sign=yes, ac_cv_rshift_extends_sign=no)])
AC_MSG_RESULT($ac_cv_rshift_extends_sign)
if test "$ac_cv_rshift_extends_sign" = no
then
  AC_DEFINE(SIGNED_RIGHT_SHIFT_ZERO_FILLS)
fi


# THIS MUST BE LAST, IT CAN BREAK OTHER TESTS!
# Add sys/socket.h to confdefs.h
cat >> confdefs.h <<\EOF
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
EOF
AC_CHECK_TYPE(socklen_t, int)

# generate output files
AC_OUTPUT(Makefile \
 Objects/Makefile \
 Parser/Makefile \
 Python/Makefile \
 Modules/Makefile.pre \
 Modules/Setup.config)