summaryrefslogtreecommitdiff
path: root/configure.ac
blob: 914ae5759f6932c28ee39afec1e36d80c8e63cd9 (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
#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
 
AC_PREREQ(2.59)
AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])
 
AC_CONFIG_SRCDIR([git.c])
 
config_file=config.mak.autogen
config_append=config.mak.append
config_in=config.mak.in
 
echo "# ${config_append}.  Generated by configure." > "${config_append}"
 
 
## Definitions of macros
# GIT_CONF_APPEND_LINE(LINE)
# --------------------------
# Append LINE to file ${config_append}
AC_DEFUN([GIT_CONF_APPEND_LINE],
[echo "$1" >> "${config_append}"])# GIT_CONF_APPEND_LINE
#
# GIT_ARG_SET_PATH(PROGRAM)
# -------------------------
# Provide --with-PROGRAM=PATH option to set PATH to PROGRAM
# Optional second argument allows setting NO_PROGRAM=YesPlease if
# --without-PROGRAM version used.
AC_DEFUN([GIT_ARG_SET_PATH],
[AC_ARG_WITH([$1],
 [AS_HELP_STRING([--with-$1=PATH],
                 [provide PATH to $1])],
 [GIT_CONF_APPEND_PATH($1,$2)],[])
])# GIT_ARG_SET_PATH
#
# GIT_CONF_APPEND_PATH(PROGRAM)
# ------------------------------
# Parse --with-PROGRAM=PATH option to set PROGRAM_PATH=PATH
# Used by GIT_ARG_SET_PATH(PROGRAM)
# Optional second argument allows setting NO_PROGRAM=YesPlease if
# --without-PROGRAM is used.
AC_DEFUN([GIT_CONF_APPEND_PATH],
[PROGRAM=m4_toupper($1); \
if test "$withval" = "no"; then \
	if test -n "$2"; then \
		m4_toupper($1)_PATH=$withval; \
		AC_MSG_NOTICE([Disabling use of ${PROGRAM}]); \
		GIT_CONF_APPEND_LINE(NO_${PROGRAM}=YesPlease); \
		GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=); \
	else \
		AC_MSG_ERROR([You cannot use git without $1]); \
	fi; \
else \
	if test "$withval" = "yes"; then \
		AC_MSG_WARN([You should provide path for --with-$1=PATH]); \
	else \
		m4_toupper($1)_PATH=$withval; \
		AC_MSG_NOTICE([Setting m4_toupper($1)_PATH to $withval]); \
		GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=$withval); \
	fi; \
fi; \
]) # GIT_CONF_APPEND_PATH
#
# GIT_PARSE_WITH(PACKAGE)
# -----------------------
# For use in AC_ARG_WITH action-if-found, for packages default ON.
# * Set NO_PACKAGE=YesPlease for --without-PACKAGE
# * Set PACKAGEDIR=PATH for --with-PACKAGE=PATH
# * Unset NO_PACKAGE for --with-PACKAGE without ARG
AC_DEFUN([GIT_PARSE_WITH],
[PACKAGE=m4_toupper($1); \
if test "$withval" = "no"; then \
	m4_toupper(NO_$1)=YesPlease; \
elif test "$withval" = "yes"; then \
	m4_toupper(NO_$1)=; \
else \
	m4_toupper(NO_$1)=; \
	m4_toupper($1)DIR=$withval; \
	AC_MSG_NOTICE([Setting m4_toupper($1)DIR to $withval]); \
	GIT_CONF_APPEND_LINE(${PACKAGE}DIR=$withval); \
fi \
])# GIT_PARSE_WITH
#
# GIT_PARSE_WITH_SET_MAKE_VAR(WITHNAME, VAR, HELP_TEXT)
# ---------------------
# Set VAR to the value specied by --with-WITHNAME.
# No verification of arguments is performed, but warnings are issued
# if either 'yes' or 'no' is specified.
# HELP_TEXT is presented when --help is called.
# This is a direct way to allow setting variables in the Makefile.
AC_DEFUN([GIT_PARSE_WITH_SET_MAKE_VAR],
[AC_ARG_WITH([$1],
 [AS_HELP_STRING([--with-$1=VALUE], $3)],
 if test -n "$withval"; then \
  if test "$withval" = "yes" -o "$withval" = "no"; then \
    AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
		     [a value for $1 ($2).  Maybe you do...?]); \
  fi; \
  \
  AC_MSG_NOTICE([Setting $2 to $withval]); \
  GIT_CONF_APPEND_LINE($2=$withval); \
 fi)])# GIT_PARSE_WITH_SET_MAKE_VAR
 
dnl
dnl GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
dnl -----------------------------------------
dnl Similar to AC_CHECK_FUNC, but on systems that do not generate
dnl warnings for missing prototypes (e.g. FreeBSD when compiling without
dnl -Wall), it does not work.  By looking for function definition in
dnl libraries, this problem can be worked around.
AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
  AC_SEARCH_LIBS([$1],,
  [$2],[$3])
],[$3])])
 
dnl
dnl GIT_STASH_FLAGS(BASEPATH_VAR)
dnl -----------------------------
dnl Allow for easy stashing of LDFLAGS and CPPFLAGS before running
dnl tests that may want to take user settings into account.
AC_DEFUN([GIT_STASH_FLAGS],[
if test -n "$1"; then
   old_CPPFLAGS="$CPPFLAGS"
   old_LDFLAGS="$LDFLAGS"
   CPPFLAGS="-I$1/include $CPPFLAGS"
   LDFLAGS="-L$1/$lib $LDFLAGS"
fi
])
 
dnl
dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
dnl -----------------------------
dnl Restore the stashed *FLAGS values.
AC_DEFUN([GIT_UNSTASH_FLAGS],[
if test -n "$1"; then
   CPPFLAGS="$old_CPPFLAGS"
   LDFLAGS="$old_LDFLAGS"
fi
])
 
## Site configuration related to programs (before tests)
## --with-PACKAGE[=ARG] and --without-PACKAGE
#
# Set lib to alternative name of lib directory (e.g. lib64)
AC_ARG_WITH([lib],
 [AS_HELP_STRING([--with-lib=ARG],
                 [ARG specifies alternative name for lib directory])],
 [if test "$withval" = "no" || test "$withval" = "yes"; then \
	AC_MSG_WARN([You should provide name for --with-lib=ARG]); \
else \
	lib=$withval; \
	AC_MSG_NOTICE([Setting lib to '$lib']); \
	GIT_CONF_APPEND_LINE(lib=$withval); \
fi; \
],[])
 
if test -z "$lib"; then
   AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
   lib=lib
fi
 
AC_ARG_ENABLE([pthreads],
 [AS_HELP_STRING([--enable-pthreads=FLAGS],
  [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
  [The default if FLAGS is not specified is to try first -pthread]
  [and then -lpthread.]
  [--without-pthreads will disable threading.])],
[
if test "x$enableval" = "xyes"; then
   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
elif test "x$enableval" != "xno"; then
   PTHREAD_CFLAGS=$enableval
   AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
else
   AC_MSG_NOTICE([POSIX Threads will be disabled.])
   NO_PTHREADS=YesPlease
   USER_NOPTHREAD=1
fi],
[
   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads.])
])
 
## Site configuration (override autodetection)
## --with-PACKAGE[=ARG] and --without-PACKAGE
AC_MSG_NOTICE([CHECKS for site configuration])
#
# Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
# tests.  These tests take up a significant amount of the total test time
# but are not needed unless you plan to talk to SVN repos.
#
# Define PPC_SHA1 environment variable when running make to make use of
# a bundled SHA1 routine optimized for PowerPC.
#
# Define NO_OPENSSL environment variable if you do not have OpenSSL.
# This also implies BLK_SHA1.
#
# Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
# /foo/bar/include and /foo/bar/lib directories.
AC_ARG_WITH(openssl,
AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
AS_HELP_STRING([],              [ARG can be prefix for openssl library and headers]),\
GIT_PARSE_WITH(openssl))
#
# Define NO_CURL if you do not have curl installed.  git-http-pull and
# git-http-push are not built, and you cannot use http:// and https://
# transports.
#
# Define CURLDIR=/foo/bar if your curl header and library files are in
# /foo/bar/include and /foo/bar/lib directories.
AC_ARG_WITH(curl,
AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
AS_HELP_STRING([],           [ARG can be also prefix for curl library and headers]),
GIT_PARSE_WITH(curl))
#
# Define NO_EXPAT if you do not have expat installed.  git-http-push is
# not built, and you cannot push using http:// and https:// transports.
#
# Define EXPATDIR=/foo/bar if your expat header and library files are in
# /foo/bar/include and /foo/bar/lib directories.
AC_ARG_WITH(expat,
AS_HELP_STRING([--with-expat],
[support git-push using http:// and https:// transports via WebDAV (default is YES)])
AS_HELP_STRING([],            [ARG can be also prefix for expat library and headers]),
GIT_PARSE_WITH(expat))
#
# Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
# installed in /sw, but don't want GIT to link against any libraries
# installed there.  If defined you may specify your own (or Fink's)
# include directories and library directories by defining CFLAGS
# and LDFLAGS appropriately.
#
# Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
# have DarwinPorts installed in /opt/local, but don't want GIT to
# link against any libraries installed there.  If defined you may
# specify your own (or DarwinPort's) include directories and
# library directories by defining CFLAGS and LDFLAGS appropriately.
#
# Define NO_MMAP if you want to avoid mmap.
#
# Define NO_ICONV if your libc does not properly support iconv.
AC_ARG_WITH(iconv,
AS_HELP_STRING([--without-iconv],
[if your architecture doesn't properly support iconv])
AS_HELP_STRING([--with-iconv=PATH],
[PATH is prefix for libiconv library and headers])
AS_HELP_STRING([],
[used only if you need linking with libiconv]),
GIT_PARSE_WITH(iconv))
 
## --enable-FEATURE[=ARG] and --disable-FEATURE
#
# Define USE_NSEC below if you want git to care about sub-second file mtimes
# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
# randomly break unless your underlying filesystem supports those sub-second
# times (my ext3 doesn't).
#
# Define USE_STDEV below if you want git to care about the underlying device
# change being considered an inode change from the update-index perspective.
 
#
# Allow user to set ETC_GITCONFIG variable
GIT_PARSE_WITH_SET_MAKE_VAR(gitconfig, ETC_GITCONFIG,
			Use VALUE instead of /etc/gitconfig as the
			global git configuration file.
			If VALUE is not fully qualified it will be interpretted
			as a path relative to the computed prefix at runtime.)
 
#
# Allow user to set the default pager
GIT_PARSE_WITH_SET_MAKE_VAR(pager, DEFAULT_PAGER,
			Use VALUE as the fall-back pager instead of 'less'.
			This is used by things like 'git log' when the user
			does not specify a pager to use through alternate
			methods. eg: /usr/bin/pager)
#
# Allow user to set the default editor
GIT_PARSE_WITH_SET_MAKE_VAR(editor, DEFAULT_EDITOR,
			Use VALUE as the fall-back editor instead of 'vi'.
			This is used by things like 'git commit' when the user
			does not specify a preferred editor through other
			methods. eg: /usr/bin/editor)
 
#
# Define SHELL_PATH to provide path to shell.
GIT_ARG_SET_PATH(shell)
#
# Define PERL_PATH to provide path to Perl.
GIT_ARG_SET_PATH(perl)
#
# Define PYTHON_PATH to provide path to Python.
GIT_ARG_SET_PATH(python, allow-without)
#
# Define ZLIB_PATH to provide path to zlib.
GIT_ARG_SET_PATH(zlib)
#
# Declare the with-tcltk/without-tcltk options.
AC_ARG_WITH(tcltk,
AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),\
GIT_PARSE_WITH(tcltk))
#
 
 
## Checks for programs.
AC_MSG_NOTICE([CHECKS for programs])
#
AC_PROG_CC([cc gcc])
# which switch to pass runtime path to dynamic libraries to the linker
AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
   SAVE_LDFLAGS="${LDFLAGS}"
   LDFLAGS="${SAVE_LDFLAGS} -R /"
   AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
   LDFLAGS="${SAVE_LDFLAGS}"
])
if test "$git_cv_ld_dashr" = "yes"; then
   AC_SUBST(CC_LD_DYNPATH, [-R])
else
   AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
      SAVE_LDFLAGS="${LDFLAGS}"
      LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
      AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
      LDFLAGS="${SAVE_LDFLAGS}"
   ])
   if test "$git_cv_ld_wl_rpath" = "yes"; then
      AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
   else
      AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
         SAVE_LDFLAGS="${LDFLAGS}"
         LDFLAGS="${SAVE_LDFLAGS} -rpath /"
         AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
         LDFLAGS="${SAVE_LDFLAGS}"
      ])
      if test "$git_cv_ld_rpath" = "yes"; then
         AC_SUBST(CC_LD_DYNPATH, [-rpath])
      else
         AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
      fi
   fi
fi
#AC_PROG_INSTALL		# needs install-sh or install.sh in sources
AC_CHECK_TOOLS(AR, [gar ar], :)
AC_CHECK_PROGS(TAR, [gtar tar])
# TCLTK_PATH will be set to some value if we want Tcl/Tk
# or will be empty otherwise.
if test -z "$NO_TCLTK"; then
  if test "$with_tcltk" = ""; then
  # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
    TCLTK_PATH=wish
    AC_SUBST(TCLTK_PATH)
  elif test "$with_tcltk" = "yes"; then
  # Tcl/Tk check requested.
    AC_CHECK_PROGS(TCLTK_PATH, [wish], )
  else
    AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
    TCLTK_PATH="$with_tcltk"
    AC_SUBST(TCLTK_PATH)
  fi
fi
AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
if test -n "$ASCIIDOC"; then
	AC_MSG_CHECKING([for asciidoc version])
	asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
	case "${asciidoc_version}" in
	asciidoc' '8*)
		ASCIIDOC8=YesPlease
		AC_MSG_RESULT([${asciidoc_version} > 7])
		;;
	asciidoc' '7*)
		ASCIIDOC8=
		AC_MSG_RESULT([${asciidoc_version}])
		;;
	*)
		ASCIIDOC8=
		AC_MSG_RESULT([${asciidoc_version} (unknown)])
		;;
	esac
fi
AC_SUBST(ASCIIDOC8)
 
 
## Checks for libraries.
AC_MSG_NOTICE([CHECKS for libraries])
#
# Define NO_OPENSSL environment variable if you do not have OpenSSL.
# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
 
GIT_STASH_FLAGS($OPENSSLDIR)
 
AC_CHECK_LIB([crypto], [SHA1_Init],
[NEEDS_SSL_WITH_CRYPTO=],
[AC_CHECK_LIB([ssl], [SHA1_Init],
 [NEEDS_SSL_WITH_CRYPTO=YesPlease],
 [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
 
GIT_UNSTASH_FLAGS($OPENSSLDIR)
 
AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
AC_SUBST(NO_OPENSSL)
 
#
# Define NO_CURL if you do not have libcurl installed.  git-http-pull and
# git-http-push are not built, and you cannot use http:// and https://
# transports.
 
GIT_STASH_FLAGS($CURLDIR)
 
AC_CHECK_LIB([curl], [curl_global_init],
[NO_CURL=],
[NO_CURL=YesPlease])
 
GIT_UNSTASH_FLAGS($CURLDIR)
 
AC_SUBST(NO_CURL)
 
#
# Define NO_EXPAT if you do not have expat installed.  git-http-push is
# not built, and you cannot push using http:// and https:// transports.
 
GIT_STASH_FLAGS($EXPATDIR)
 
AC_CHECK_LIB([expat], [XML_ParserCreate],
[NO_EXPAT=],
[NO_EXPAT=YesPlease])
 
GIT_UNSTASH_FLAGS($EXPATDIR)
 
AC_SUBST(NO_EXPAT)
 
#
# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
# some Solaris installations).
# Define NO_ICONV if neither libc nor libiconv support iconv.
 
if test -z "$NO_ICONV"; then
 
GIT_STASH_FLAGS($ICONVDIR)
 
AC_DEFUN([ICONVTEST_SRC], [
#include <iconv.h>
 
int main(void)
{
	iconv_open("", "");
	return 0;
}
])
 
if test -n "$ICONVDIR"; then
   lib_order="-liconv -lc"
else
   lib_order="-lc -liconv"
fi
 
NO_ICONV=YesPlease
 
for l in $lib_order; do
    if test "$l" = "-liconv"; then
       NEEDS_LIBICONV=YesPlease
    else
       NEEDS_LIBICONV=
    fi
 
    old_LIBS="$LIBS"
    LIBS="$LIBS $l"
    AC_MSG_CHECKING([for iconv in $l])
    AC_LINK_IFELSE(ICONVTEST_SRC,
	[AC_MSG_RESULT([yes])
	NO_ICONV=
	break],
	[AC_MSG_RESULT([no])])
    LIBS="$old_LIBS"
done
 
#in case of break
LIBS="$old_LIBS"
 
GIT_UNSTASH_FLAGS($ICONVDIR)
 
AC_SUBST(NEEDS_LIBICONV)
AC_SUBST(NO_ICONV)
 
if test -n "$NO_ICONV"; then
    NEEDS_LIBICONV=
fi
 
fi
 
#
# Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
 
GIT_STASH_FLAGS($ZLIB_PATH)
 
AC_DEFUN([ZLIBTEST_SRC], [
#include <zlib.h>
 
int main(void)
{
	deflateBound(0, 0);
	return 0;
}
])
AC_MSG_CHECKING([for deflateBound in -lz])
old_LIBS="$LIBS"
LIBS="$LIBS -lz"
AC_LINK_IFELSE(ZLIBTEST_SRC,
	[AC_MSG_RESULT([yes])],
	[AC_MSG_RESULT([no])
	NO_DEFLATE_BOUND=yes])
LIBS="$old_LIBS"
 
GIT_UNSTASH_FLAGS($ZLIB_PATH)
 
AC_SUBST(NO_DEFLATE_BOUND)
 
#
# Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
# Patrick Mauritz).
AC_CHECK_LIB([c], [socket],
[NEEDS_SOCKET=],
[NEEDS_SOCKET=YesPlease])
AC_SUBST(NEEDS_SOCKET)
test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
 
#
# Define NEEDS_RESOLV if linking with -lnsl and/or -lsocket is not enough.
# Notably on Solaris hstrerror resides in libresolv and on Solaris 7
# inet_ntop and inet_pton additionally reside there.
AC_CHECK_LIB([c], [hstrerror],
[NEEDS_RESOLV=],
[NEEDS_RESOLV=YesPlease])
AC_SUBST(NEEDS_RESOLV)
test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
 
AC_CHECK_LIB([c], [basename],
[NEEDS_LIBGEN=],
[NEEDS_LIBGEN=YesPlease])
AC_SUBST(NEEDS_LIBGEN)
test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
 
## Checks for header files.
AC_MSG_NOTICE([CHECKS for header files])
#
# Define NO_SYS_SELECT_H if you don't have sys/select.h.
AC_CHECK_HEADER([sys/select.h],
[NO_SYS_SELECT_H=],
[NO_SYS_SELECT_H=UnfortunatelyYes])
AC_SUBST(NO_SYS_SELECT_H)
#
# Define OLD_ICONV if your library has an old iconv(), where the second
# (input buffer pointer) parameter is declared with type (const char **).
AC_DEFUN([OLDICONVTEST_SRC], [[
#include <iconv.h>
 
extern size_t iconv(iconv_t cd,
		    char **inbuf, size_t *inbytesleft,
		    char **outbuf, size_t *outbytesleft);
 
int main(void)
{
	return 0;
}
]])
 
GIT_STASH_FLAGS($ICONVDIR)
 
AC_MSG_CHECKING([for old iconv()])
AC_COMPILE_IFELSE(OLDICONVTEST_SRC,
	[AC_MSG_RESULT([no])],
	[AC_MSG_RESULT([yes])
	OLD_ICONV=UnfortunatelyYes])
 
GIT_UNSTASH_FLAGS($ICONVDIR)
 
AC_SUBST(OLD_ICONV)
 
## Checks for typedefs, structures, and compiler characteristics.
AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
#
# Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
AC_CHECK_MEMBER(struct dirent.d_ino,
[NO_D_INO_IN_DIRENT=],
[NO_D_INO_IN_DIRENT=YesPlease],
[#include <dirent.h>])
AC_SUBST(NO_D_INO_IN_DIRENT)
#
# Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
# d_type in struct dirent (latest Cygwin -- will be fixed soonish).
AC_CHECK_MEMBER(struct dirent.d_type,
[NO_D_TYPE_IN_DIRENT=],
[NO_D_TYPE_IN_DIRENT=YesPlease],
[#include <dirent.h>])
AC_SUBST(NO_D_TYPE_IN_DIRENT)
#
# Define NO_SOCKADDR_STORAGE if your platform does not have struct
# sockaddr_storage.
AC_CHECK_TYPE(struct sockaddr_storage,
[NO_SOCKADDR_STORAGE=],
[NO_SOCKADDR_STORAGE=YesPlease],[
#include <sys/types.h>
#include <sys/socket.h>
])
AC_SUBST(NO_SOCKADDR_STORAGE)
#
# Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
AC_CHECK_TYPE([struct addrinfo],[
 GIT_CHECK_FUNC([getaddrinfo],
  [NO_IPV6=],
  [NO_IPV6=YesPlease])
],[NO_IPV6=YesPlease],[
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
])
AC_SUBST(NO_IPV6)
#
# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
# do not support the 'size specifiers' introduced by C99, namely ll, hh,
# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
# some C compilers supported these specifiers prior to C99 as an extension.
AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers],
 [ac_cv_c_c99_format],
[# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
AC_RUN_IFELSE(
	[AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
		[[char buf[64];
		if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
		  return 1;
		else if (strcmp(buf, "12345"))
		  return 2;]])],
	[ac_cv_c_c99_format=yes],
	[ac_cv_c_c99_format=no])
])
if test $ac_cv_c_c99_format = no; then
	NO_C99_FORMAT=YesPlease
else
	NO_C99_FORMAT=
fi
AC_SUBST(NO_C99_FORMAT)
#
# Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
# when attempting to read from an fopen'ed directory.
AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
 [ac_cv_fread_reads_directories],
[
AC_RUN_IFELSE(
	[AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
		[[char c;
		FILE *f = fopen(".", "r");
		return f && fread(&c, 1, 1, f)]])],
	[ac_cv_fread_reads_directories=no],
	[ac_cv_fread_reads_directories=yes])
])
if test $ac_cv_fread_reads_directories = yes; then
	FREAD_READS_DIRECTORIES=UnfortunatelyYes
else
	FREAD_READS_DIRECTORIES=
fi
AC_SUBST(FREAD_READS_DIRECTORIES)
#
# Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
# or vsnprintf() return -1 instead of number of characters which would
# have been written to the final string if enough space had been available.
AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
 [ac_cv_snprintf_returns_bogus],
[
AC_RUN_IFELSE(
	[AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
		#include "stdarg.h"
 
		int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
		{
		  int ret;
		  va_list ap;
		  va_start(ap, format);
		  ret = vsnprintf(str, maxsize, format, ap);
		  va_end(ap);
		  return ret;
		}],
		[[char buf[6];
		  if (test_vsnprintf(buf, 3, "%s", "12345") != 5
		      || strcmp(buf, "12")) return 1;
		  if (snprintf(buf, 3, "%s", "12345") != 5
		      || strcmp(buf, "12")) return 1]])],
	[ac_cv_snprintf_returns_bogus=no],
	[ac_cv_snprintf_returns_bogus=yes])
])
if test $ac_cv_snprintf_returns_bogus = yes; then
	SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
else
	SNPRINTF_RETURNS_BOGUS=
fi
AC_SUBST(SNPRINTF_RETURNS_BOGUS)
 
 
## Checks for library functions.
## (in default C library and libraries checked by AC_CHECK_LIB)
AC_MSG_NOTICE([CHECKS for library functions])
#
# Define NO_LIBGEN_H if you don't have libgen.h.
AC_CHECK_HEADER([libgen.h],
[NO_LIBGEN_H=],
[NO_LIBGEN_H=YesPlease])
AC_SUBST(NO_LIBGEN_H)
#
# Define NO_STRCASESTR if you don't have strcasestr.
GIT_CHECK_FUNC(strcasestr,
[NO_STRCASESTR=],
[NO_STRCASESTR=YesPlease])
AC_SUBST(NO_STRCASESTR)
#
# Define NO_MEMMEM if you don't have memmem.
GIT_CHECK_FUNC(memmem,
[NO_MEMMEM=],
[NO_MEMMEM=YesPlease])
AC_SUBST(NO_MEMMEM)
#
# Define NO_STRLCPY if you don't have strlcpy.
GIT_CHECK_FUNC(strlcpy,
[NO_STRLCPY=],
[NO_STRLCPY=YesPlease])
AC_SUBST(NO_STRLCPY)
#
# Define NO_UINTMAX_T if your platform does not have uintmax_t
AC_CHECK_TYPE(uintmax_t,
[NO_UINTMAX_T=],
[NO_UINTMAX_T=YesPlease],[
#include <inttypes.h>
])
AC_SUBST(NO_UINTMAX_T)
#
# Define NO_STRTOUMAX if you don't have strtoumax in the C library.
GIT_CHECK_FUNC(strtoumax,
[NO_STRTOUMAX=],
[NO_STRTOUMAX=YesPlease])
AC_SUBST(NO_STRTOUMAX)
#
# Define NO_SETENV if you don't have setenv in the C library.
GIT_CHECK_FUNC(setenv,
[NO_SETENV=],
[NO_SETENV=YesPlease])
AC_SUBST(NO_SETENV)
#
# Define NO_UNSETENV if you don't have unsetenv in the C library.
GIT_CHECK_FUNC(unsetenv,
[NO_UNSETENV=],
[NO_UNSETENV=YesPlease])
AC_SUBST(NO_UNSETENV)
#
# Define NO_MKDTEMP if you don't have mkdtemp in the C library.
GIT_CHECK_FUNC(mkdtemp,
[NO_MKDTEMP=],
[NO_MKDTEMP=YesPlease])
AC_SUBST(NO_MKDTEMP)
#
# Define NO_MKSTEMPS if you don't have mkstemps in the C library.
GIT_CHECK_FUNC(mkstemps,
[NO_MKSTEMPS=],
[NO_MKSTEMPS=YesPlease])
AC_SUBST(NO_MKSTEMPS)
#
#
# Define NO_MMAP if you want to avoid mmap.
#
# Define NO_ICONV if your libc does not properly support iconv.
 
 
## Other checks.
# Define USE_PIC if you need the main git objects to be built with -fPIC
# in order to build and link perl/Git.so.  x86-64 seems to need this.
#
# Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
# Enable it on Windows.  By default, symrefs are still used.
#
# Define NO_PTHREADS if we do not have pthreads.
#
# Define PTHREAD_LIBS to the linker flag used for Pthread support.
AC_DEFUN([PTHREADTEST_SRC], [
#include <pthread.h>
 
int main(void)
{
	pthread_mutex_t test_mutex;
	return (0);
}
])
 
dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
dnl   [[#include <pthread.h>]],
dnl   [[pthread_mutex_t test_mutex;]]
dnl )])
 
NO_PTHREADS=UnfortunatelyYes
PTHREAD_LIBS=
 
if test -n "$USER_NOPTHREAD"; then
   AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
# handle these separately since PTHREAD_CFLAGS could be '-lpthreads
# -D_REENTRANT' or some such.
elif test -z "$PTHREAD_CFLAGS"; then
  for opt in -pthread -lpthread; do
     old_CFLAGS="$CFLAGS"
     CFLAGS="$opt $CFLAGS"
     AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
     AC_LINK_IFELSE(PTHREADTEST_SRC,
	[AC_MSG_RESULT([yes])
		NO_PTHREADS=
		PTHREAD_LIBS="$opt"
		break
	],
	[AC_MSG_RESULT([no])])
      CFLAGS="$old_CFLAGS"
  done
else
  old_CFLAGS="$CFLAGS"
  CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
  AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
  AC_LINK_IFELSE(PTHREADTEST_SRC,
	[AC_MSG_RESULT([yes])
		NO_PTHREADS=
		PTHREAD_LIBS="$PTHREAD_CFLAGS"
	],
	[AC_MSG_RESULT([no])])
 
  CFLAGS="$old_CFLAGS"
fi
 
CFLAGS="$old_CFLAGS"
 
AC_SUBST(PTHREAD_LIBS)
AC_SUBST(NO_PTHREADS)
 
## Output files
AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
AC_OUTPUT
 
 
## Cleanup
rm -f "${config_append}"