Source

git / configure.ac

Full commit
   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
#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

## Definitions of private macros.

# GIT_CONF_SUBST(VAL, VAR)
# ------------------------
# Cause the line "VAR=VAL" to be eventually appended to ${config_file}.
AC_DEFUN([GIT_CONF_SUBST],
[AC_REQUIRE([GIT_CONF_SUBST_INIT])
config_appended_defs="$config_appended_defs${newline}dnl
$1=m4_if([$#],[1],[${$1}],[$2])"])

# GIT_CONF_SUBST_INIT
# -------------------
# Prepare shell variables and autoconf machine required by later calls
# to GIT_CONF_SUBST.
AC_DEFUN([GIT_CONF_SUBST_INIT],
    [config_appended_defs=; newline='
'
    AC_CONFIG_COMMANDS([$config_file],
                       [echo "$config_appended_defs" >> "$config_file"],
                       [config_file=$config_file
                        config_appended_defs="$config_appended_defs"])])

# 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_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],
    [m4_pushdef([GIT_UC_PROGRAM], m4_toupper([$1]))dnl
    if test "$withval" = "no"; then
	if test -n "$2"; then
		GIT_UC_PROGRAM[]_PATH=$withval
		AC_MSG_NOTICE([Disabling use of GIT_UC_PROGRAM])
		GIT_CONF_SUBST([NO_]GIT_UC_PROGRAM, [YesPlease])
		GIT_CONF_SUBST(GIT_UC_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-$1=PATH])
	else
		GIT_UC_PROGRAM[]_PATH=$withval
		AC_MSG_NOTICE([Setting GIT_UC_PROGRAM[]_PATH to $withval])
		GIT_CONF_SUBST(GIT_UC_PROGRAM[]_PATH, [$withval])
	fi
    fi
    m4_popdef([GIT_UC_PROGRAM])])

# 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],
    [m4_pushdef([GIT_UC_PACKAGE], m4_toupper([$1]))dnl
    if test "$withval" = "no"; then
	NO_[]GIT_UC_PACKAGE=YesPlease
    elif test "$withval" = "yes"; then
	NO_[]GIT_UC_PACKAGE=
    else
	NO_[]GIT_UC_PACKAGE=
	GIT_UC_PACKAGE[]DIR=$withval
	AC_MSG_NOTICE([Setting GIT_UC_PACKAGE[]DIR to $withval])
	GIT_CONF_SUBST(GIT_UC_PACKAGE[DIR], [$withval])
    fi
    m4_popdef([GIT_UC_PACKAGE])])

# 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_SUBST([$2], [$withval])
 fi)])# GIT_PARSE_WITH_SET_MAKE_VAR

#
# GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
# -----------------------------------------
# Similar to AC_CHECK_FUNC, but on systems that do not generate
# warnings for missing prototypes (e.g. FreeBSD when compiling without
# -Wall), it does not work.  By looking for function definition in
# libraries, this problem can be worked around.
AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
  AC_SEARCH_LIBS([$1],,
  [$2],[$3])
],[$3])])

#
# GIT_STASH_FLAGS(BASEPATH_VAR)
# -----------------------------
# Allow for easy stashing of LDFLAGS and CPPFLAGS before running
# 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
])

## Configure body starts here.

AC_PREREQ(2.59)
AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])

AC_CONFIG_SRCDIR([git.c])

config_file=config.mak.autogen
config_in=config.mak.in

GIT_CONF_SUBST([AUTOCONFIGURED], [YesPlease])

# Directories holding "saner" versions of common or POSIX binaries.
AC_ARG_WITH([sane-tool-path],
  [AS_HELP_STRING(
    [--with-sane-tool-path=DIR-1[[:DIR-2...:DIR-n]]],
    [Directories to prepend to PATH in build system and generated scripts])],
  [if test "$withval" = "no"; then
    withval=''
  else
    AC_MSG_NOTICE([Setting SANE_TOOL_PATH to '$withval'])
  fi
  GIT_CONF_SUBST([SANE_TOOL_PATH], [$withval])],
  [# If the "--with-sane-tool-path" option was not given, don't touch
   # SANE_TOOL_PATH here, but let defaults in Makefile take care of it.
   # This should minimize spurious differences in the behaviour of the
   # Git build system when configure is used w.r.t. when it is not.
   :])

## 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_SUBST([lib])
  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.])
])

# Define option to enable JavaScript minification
AC_ARG_ENABLE([jsmin],
[AS_HELP_STRING([--enable-jsmin=PATH],
  [PATH is the name of a JavaScript minifier or the absolute path to one.])],
[
  JSMIN=$enableval;
  AC_MSG_NOTICE([Setting JSMIN to '$JSMIN' to enable JavaScript minifying])
  GIT_CONF_SUBST([JSMIN])
])

# Define option to enable CSS minification
AC_ARG_ENABLE([cssmin],
[AS_HELP_STRING([--enable-cssmin=PATH],
  [PATH is the name of a CSS minifier or the absolute path to one.])],
[
  CSSMIN=$enableval;
  AC_MSG_NOTICE([Setting CSSMIN to '$CSSMIN' to enable CSS minifying])
  GIT_CONF_SUBST([CSSMIN])
])

## 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 USE_LIBPCRE if you have and want to use libpcre. git-grep will be
# able to use Perl-compatible regular expressions.
#
# Define LIBPCREDIR=/foo/bar if your libpcre header and library files are in
# /foo/bar/include and /foo/bar/lib directories.
#
AC_ARG_WITH(libpcre,
AS_HELP_STRING([--with-libpcre],[support Perl-compatible regexes (default is NO)])
AS_HELP_STRING([],           [ARG can be also prefix for libpcre library and headers]),
    if test "$withval" = "no"; then
	USE_LIBPCRE=
    elif test "$withval" = "yes"; then
	USE_LIBPCRE=YesPlease
    else
	USE_LIBPCRE=YesPlease
	LIBPCREDIR=$withval
	AC_MSG_NOTICE([Setting LIBPCREDIR to $LIBPCREDIR])
        dnl USE_LIBPCRE can still be modified below, so don't substitute
        dnl it yet.
	GIT_CONF_SUBST([LIBPCREDIR])
    fi)
#
# 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 interpreted
			as a path relative to the computed prefix at runtime.)

#
# Allow user to set ETC_GITATTRIBUTES variable
GIT_PARSE_WITH_SET_MAKE_VAR(gitattributes, ETC_GITATTRIBUTES,
			Use VALUE instead of /etc/gitattributes as the
			global git attributes file.
			If VALUE is not fully qualified it will be interpreted
			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])
AC_C_INLINE
case $ac_cv_c_inline in
  inline | yes | no) INLINE='';;
  *)                 INLINE=$ac_cv_c_inline ;;
esac
GIT_CONF_SUBST([INLINE])

# 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
   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
      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
         CC_LD_DYNPATH=-rpath
      else
         CC_LD_DYNPATH=
         AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
      fi
   fi
fi
GIT_CONF_SUBST([CC_LD_DYNPATH])
#AC_PROG_INSTALL		# needs install-sh or install.sh in sources
AC_CHECK_TOOLS(AR, [gar ar], :)
AC_CHECK_PROGS(TAR, [gtar tar])
AC_CHECK_PROGS(DIFF, [gnudiff gdiff diff])
# TCLTK_PATH will be set to some value if we want Tcl/Tk
# or will be empty otherwise.
if test -n "$NO_TCLTK"; then
  TCLTK_PATH=
else
  if test "$with_tcltk" = ""; then
  # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
    TCLTK_PATH=wish
  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"
  fi
fi
GIT_CONF_SUBST([TCLTK_PATH])
AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
if test -n "$ASCIIDOC"; then
	AC_MSG_CHECKING([for asciidoc version])
	asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
	case "${asciidoc_version}" in
	asciidoc' '8*)
		AC_MSG_RESULT([${asciidoc_version}])
		;;
	*)
		AC_MSG_RESULT([${asciidoc_version} (unknown)])
		;;
	esac
fi


## 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 NO_OPENSSL=],
 [NEEDS_SSL_WITH_CRYPTO=          NO_OPENSSL=YesPlease])])

GIT_UNSTASH_FLAGS($OPENSSLDIR)

GIT_CONF_SUBST([NEEDS_SSL_WITH_CRYPTO])
GIT_CONF_SUBST([NO_OPENSSL])

#
# Define USE_LIBPCRE if you have and want to use libpcre. git-grep will be
# able to use Perl-compatible regular expressions.
#

if test -n "$USE_LIBPCRE"; then

GIT_STASH_FLAGS($LIBPCREDIR)

AC_CHECK_LIB([pcre], [pcre_version],
[USE_LIBPCRE=YesPlease],
[USE_LIBPCRE=])

GIT_UNSTASH_FLAGS($LIBPCREDIR)

GIT_CONF_SUBST([USE_LIBPCRE])

fi

#
# 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)

GIT_CONF_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)

GIT_CONF_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],
[AC_LANG_PROGRAM([#include <iconv.h>],
 [iconv_open("", "");])])

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)

GIT_CONF_SUBST([NEEDS_LIBICONV])
GIT_CONF_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], [
AC_LANG_PROGRAM([#include <zlib.h>],
 [deflateBound(0, 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)

GIT_CONF_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])
GIT_CONF_SUBST([NEEDS_SOCKET])
test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"

#
# The next few tests will define NEEDS_RESOLV if linking with
# libresolv provides some of the functions we would normally get
# from libc.
NEEDS_RESOLV=
#
# Define NO_INET_NTOP if linking with -lresolv is not enough.
# Solaris 2.7 in particular hos inet_ntop in -lresolv.
NO_INET_NTOP=
AC_CHECK_FUNC([inet_ntop],
    [],
    [AC_CHECK_LIB([resolv], [inet_ntop],
	[NEEDS_RESOLV=YesPlease],
	[NO_INET_NTOP=YesPlease])
])
GIT_CONF_SUBST([NO_INET_NTOP])
#
# Define NO_INET_PTON if linking with -lresolv is not enough.
# Solaris 2.7 in particular hos inet_pton in -lresolv.
NO_INET_PTON=
AC_CHECK_FUNC([inet_pton],
    [],
    [AC_CHECK_LIB([resolv], [inet_pton],
	[NEEDS_RESOLV=YesPlease],
	[NO_INET_PTON=YesPlease])
])
GIT_CONF_SUBST([NO_INET_PTON])
#
# Define NO_HSTRERROR if linking with -lresolv is not enough.
# Solaris 2.6 in particular has no hstrerror, even in -lresolv.
NO_HSTRERROR=
AC_CHECK_FUNC([hstrerror],
    [],
    [AC_CHECK_LIB([resolv], [hstrerror],
	[NEEDS_RESOLV=YesPlease],
	[NO_HSTRERROR=YesPlease])
])
GIT_CONF_SUBST([NO_HSTRERROR])

dnl This must go after all the possible places for its initialization,
dnl in the AC_CHECK_FUNC invocations above.
GIT_CONF_SUBST([NEEDS_RESOLV])
#
# If any of the above tests determined that -lresolv is needed at
# build-time, also set it here for remaining configure-time checks.
test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"

AC_CHECK_LIB([c], [basename],
[NEEDS_LIBGEN=],
[NEEDS_LIBGEN=YesPlease])
GIT_CONF_SUBST([NEEDS_LIBGEN])
test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"

AC_CHECK_LIB([c], [gettext],
[LIBC_CONTAINS_LIBINTL=YesPlease],
[LIBC_CONTAINS_LIBINTL=])
GIT_CONF_SUBST([LIBC_CONTAINS_LIBINTL])

#
# Define NO_GETTEXT if you don't want Git output to be translated.
# A translated Git requires GNU libintl or another gettext implementation
AC_CHECK_HEADER([libintl.h],
[NO_GETTEXT=],
[NO_GETTEXT=YesPlease])
GIT_CONF_SUBST([NO_GETTEXT])

if test -z "$NO_GETTEXT"; then
    test -n "$LIBC_CONTAINS_LIBINTL" || LIBS="$LIBS -lintl"
fi

## 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])
GIT_CONF_SUBST([NO_SYS_SELECT_H])
#
# Define NO_SYS_POLL_H if you don't have sys/poll.h
AC_CHECK_HEADER([sys/poll.h],
[NO_SYS_POLL_H=],
[NO_SYS_POLL_H=UnfortunatelyYes])
GIT_CONF_SUBST([NO_SYS_POLL_H])
#
# Define NO_INTTYPES_H if you don't have inttypes.h
AC_CHECK_HEADER([inttypes.h],
[NO_INTTYPES_H=],
[NO_INTTYPES_H=UnfortunatelyYes])
GIT_CONF_SUBST([NO_INTTYPES_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], [
AC_LANG_PROGRAM([[
#include <iconv.h>

extern size_t iconv(iconv_t cd,
		    char **inbuf, size_t *inbytesleft,
		    char **outbuf, size_t *outbytesleft);
]], [])])

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)

GIT_CONF_SUBST([OLD_ICONV])

## Checks for typedefs, structures, and compiler characteristics.
AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
#
TYPE_SOCKLEN_T
case $ac_cv_type_socklen_t in
  yes)	SOCKLEN_T='';;
  *)  	SOCKLEN_T=$git_cv_socklen_t_equiv;;
esac
GIT_CONF_SUBST([SOCKLEN_T])

# 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>])
GIT_CONF_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>])
GIT_CONF_SUBST([NO_D_TYPE_IN_DIRENT])
#
# Define NO_GECOS_IN_PWENT if you don't have pw_gecos in struct passwd
# in the C library.
AC_CHECK_MEMBER(struct passwd.pw_gecos,
[NO_GECOS_IN_PWENT=],
[NO_GECOS_IN_PWENT=YesPlease],
[#include <pwd.h>])
GIT_CONF_SUBST([NO_GECOS_IN_PWENT])
#
# 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>
])
GIT_CONF_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>
])
GIT_CONF_SUBST([NO_IPV6])
#
# Define NO_REGEX if you have no or inferior regex support in your C library.
AC_CACHE_CHECK([whether the platform regex can handle null bytes],
 [ac_cv_c_excellent_regex], [
AC_EGREP_CPP(yippeeyeswehaveit,
	AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
#include <regex.h>
],
[#ifdef REG_STARTEND
yippeeyeswehaveit
#endif
]),
	[ac_cv_c_excellent_regex=yes],
	[ac_cv_c_excellent_regex=no])
])
if test $ac_cv_c_excellent_regex = yes; then
	NO_REGEX=
else
	NO_REGEX=YesPlease
fi
GIT_CONF_SUBST([NO_REGEX])
#
# 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
GIT_CONF_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
GIT_CONF_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])
GIT_CONF_SUBST([NO_LIBGEN_H])
#
# Define HAVE_PATHS_H if you have paths.h.
AC_CHECK_HEADER([paths.h],
[HAVE_PATHS_H=YesPlease],
[HAVE_PATHS_H=])
GIT_CONF_SUBST([HAVE_PATHS_H])
#
# Define HAVE_LIBCHARSET_H if have libcharset.h
AC_CHECK_HEADER([libcharset.h],
[HAVE_LIBCHARSET_H=YesPlease],
[HAVE_LIBCHARSET_H=])
GIT_CONF_SUBST([HAVE_LIBCHARSET_H])
#
# Define HAVE_STRINGS_H if you have strings.h
AC_CHECK_HEADER([strings.h],
[HAVE_STRINGS_H=YesPlease],
[HAVE_STRINGS_H=])
GIT_CONF_SUBST([HAVE_STRINGS_H])
# Define CHARSET_LIB if libiconv does not export the locale_charset symbol
# and libcharset does
CHARSET_LIB=
AC_CHECK_LIB([iconv], [locale_charset],
       [],
       [AC_CHECK_LIB([charset], [locale_charset],
                     [CHARSET_LIB=-lcharset])])
GIT_CONF_SUBST([CHARSET_LIB])
#
# Define NO_STRCASESTR if you don't have strcasestr.
GIT_CHECK_FUNC(strcasestr,
[NO_STRCASESTR=],
[NO_STRCASESTR=YesPlease])
GIT_CONF_SUBST([NO_STRCASESTR])
#
# Define NO_STRTOK_R if you don't have strtok_r
GIT_CHECK_FUNC(strtok_r,
[NO_STRTOK_R=],
[NO_STRTOK_R=YesPlease])
GIT_CONF_SUBST([NO_STRTOK_R])
#
# Define NO_FNMATCH if you don't have fnmatch
GIT_CHECK_FUNC(fnmatch,
[NO_FNMATCH=],
[NO_FNMATCH=YesPlease])
GIT_CONF_SUBST([NO_FNMATCH])
#
# Define NO_FNMATCH_CASEFOLD if your fnmatch function doesn't have the
# FNM_CASEFOLD GNU extension.
AC_CACHE_CHECK([whether the fnmatch function supports the FNMATCH_CASEFOLD GNU extension],
 [ac_cv_c_excellent_fnmatch], [
AC_EGREP_CPP(yippeeyeswehaveit,
	AC_LANG_PROGRAM([
#include <fnmatch.h>
],
[#ifdef FNM_CASEFOLD
yippeeyeswehaveit
#endif
]),
	[ac_cv_c_excellent_fnmatch=yes],
	[ac_cv_c_excellent_fnmatch=no])
])
if test $ac_cv_c_excellent_fnmatch = yes; then
	NO_FNMATCH_CASEFOLD=
else
	NO_FNMATCH_CASEFOLD=YesPlease
fi
GIT_CONF_SUBST([NO_FNMATCH_CASEFOLD])
#
# Define NO_MEMMEM if you don't have memmem.
GIT_CHECK_FUNC(memmem,
[NO_MEMMEM=],
[NO_MEMMEM=YesPlease])
GIT_CONF_SUBST([NO_MEMMEM])
#
# Define NO_STRLCPY if you don't have strlcpy.
GIT_CHECK_FUNC(strlcpy,
[NO_STRLCPY=],
[NO_STRLCPY=YesPlease])
GIT_CONF_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>
])
GIT_CONF_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])
GIT_CONF_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])
GIT_CONF_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])
GIT_CONF_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])
GIT_CONF_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])
GIT_CONF_SUBST([NO_MKSTEMPS])
#
# Define NO_INITGROUPS if you don't have initgroups in the C library.
GIT_CHECK_FUNC(initgroups,
[NO_INITGROUPS=],
[NO_INITGROUPS=YesPlease])
GIT_CONF_SUBST([NO_INITGROUPS])
#
#
# 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], [
AC_LANG_PROGRAM([[
#include <pthread.h>
]], [[
	pthread_mutex_t test_mutex;
	pthread_key_t test_key;
	int retcode = 0;
	retcode |= pthread_key_create(&test_key, (void *)0);
	retcode |= pthread_mutex_init(&test_mutex,(void *)0);
	retcode |= pthread_mutex_lock(&test_mutex);
	retcode |= pthread_mutex_unlock(&test_mutex);
	return retcode;
]])])

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
  threads_found=no
  # Attempt to compile and link some code using pthreads to determine
  # required linker flags. The order is somewhat important here: We
  # first try it without any extra flags, to catch systems where
  # pthreads are part of the C library, then go on testing various other
  # flags. We do so to avoid false positives. For example, on Mac OS X
  # pthreads are part of the C library; moreover, the compiler allows us
  # to add "-mt" to the CFLAGS (although it will do nothing except
  # trigger a warning about an unused flag). Hence if we checked for
  # "-mt" before "" we would end up picking it. But unfortunately this
  # would then trigger compiler warnings on every single file we compile.
  for opt in "" -mt -pthread -lpthread; do
     old_CFLAGS="$CFLAGS"
     CFLAGS="$opt $CFLAGS"
     AC_MSG_CHECKING([for POSIX Threads with '$opt'])
     AC_LINK_IFELSE([PTHREADTEST_SRC],
	[AC_MSG_RESULT([yes])
		NO_PTHREADS=
		PTHREAD_LIBS="$opt"
		PTHREAD_CFLAGS="$opt"
		threads_found=yes
		break
	],
	[AC_MSG_RESULT([no])])
      CFLAGS="$old_CFLAGS"
  done
  if test $threads_found != yes; then
    AC_CHECK_LIB([pthread], [pthread_create],
	[PTHREAD_LIBS="-lpthread"],
	[NO_PTHREADS=UnfortunatelyYes])
  fi
else
  old_CFLAGS="$CFLAGS"
  CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
  AC_MSG_CHECKING([for POSIX Threads with '$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"

GIT_CONF_SUBST([PTHREAD_CFLAGS])
GIT_CONF_SUBST([PTHREAD_LIBS])
GIT_CONF_SUBST([NO_PTHREADS])

## Output files
AC_CONFIG_FILES(["${config_file}":"${config_in}"])
AC_OUTPUT