configure.acon commit Merge branch 'dg/document-git-c-in-git-config-doc' into maint (15a2729)
   1#                                               -*- Autoconf -*-
   2# Process this file with autoconf to produce a configure script.
   3
   4## Definitions of private macros.
   5
   6# GIT_CONF_SUBST(VAL, VAR)
   7# ------------------------
   8# Cause the line "VAR=VAL" to be eventually appended to ${config_file}.
   9AC_DEFUN([GIT_CONF_SUBST],
  10[AC_REQUIRE([GIT_CONF_SUBST_INIT])
  11config_appended_defs="$config_appended_defs${newline}dnl
  12$1=m4_if([$#],[1],[${$1}],[$2])"])
  13
  14# GIT_CONF_SUBST_INIT
  15# -------------------
  16# Prepare shell variables and autoconf machine required by later calls
  17# to GIT_CONF_SUBST.
  18AC_DEFUN([GIT_CONF_SUBST_INIT],
  19    [config_appended_defs=; newline='
  20'
  21    AC_CONFIG_COMMANDS([$config_file],
  22                       [echo "$config_appended_defs" >> "$config_file"],
  23                       [config_file=$config_file
  24                        config_appended_defs="$config_appended_defs"])])
  25
  26# GIT_ARG_SET_PATH(PROGRAM)
  27# -------------------------
  28# Provide --with-PROGRAM=PATH option to set PATH to PROGRAM
  29# Optional second argument allows setting NO_PROGRAM=YesPlease if
  30# --without-PROGRAM version used.
  31AC_DEFUN([GIT_ARG_SET_PATH],
  32    [AC_ARG_WITH([$1],
  33        [AS_HELP_STRING([--with-$1=PATH],
  34                        [provide PATH to $1])],
  35        [GIT_CONF_APPEND_PATH([$1], [$2])],
  36        [])])
  37
  38# GIT_CONF_APPEND_PATH(PROGRAM)
  39# -----------------------------
  40# Parse --with-PROGRAM=PATH option to set PROGRAM_PATH=PATH
  41# Used by GIT_ARG_SET_PATH(PROGRAM)
  42# Optional second argument allows setting NO_PROGRAM=YesPlease if
  43# --without-PROGRAM is used.
  44AC_DEFUN([GIT_CONF_APPEND_PATH],
  45    [m4_pushdef([GIT_UC_PROGRAM], m4_toupper([$1]))dnl
  46    if test "$withval" = "no"; then
  47        if test -n "$2"; then
  48                GIT_UC_PROGRAM[]_PATH=$withval
  49                AC_MSG_NOTICE([Disabling use of GIT_UC_PROGRAM])
  50                GIT_CONF_SUBST([NO_]GIT_UC_PROGRAM, [YesPlease])
  51                GIT_CONF_SUBST(GIT_UC_PROGRAM[]_PATH, [])
  52        else
  53                AC_MSG_ERROR([You cannot use git without $1])
  54        fi
  55    else
  56        if test "$withval" = "yes"; then
  57                AC_MSG_WARN([You should provide path for --with-$1=PATH])
  58        else
  59                GIT_UC_PROGRAM[]_PATH=$withval
  60                AC_MSG_NOTICE([Setting GIT_UC_PROGRAM[]_PATH to $withval])
  61                GIT_CONF_SUBST(GIT_UC_PROGRAM[]_PATH, [$withval])
  62        fi
  63    fi
  64    m4_popdef([GIT_UC_PROGRAM])])
  65
  66# GIT_PARSE_WITH(PACKAGE)
  67# -----------------------
  68# For use in AC_ARG_WITH action-if-found, for packages default ON.
  69# * Set NO_PACKAGE=YesPlease for --without-PACKAGE
  70# * Set PACKAGEDIR=PATH for --with-PACKAGE=PATH
  71# * Unset NO_PACKAGE for --with-PACKAGE without ARG
  72AC_DEFUN([GIT_PARSE_WITH],
  73    [m4_pushdef([GIT_UC_PACKAGE], m4_toupper([$1]))dnl
  74    if test "$withval" = "no"; then
  75        NO_[]GIT_UC_PACKAGE=YesPlease
  76    elif test "$withval" = "yes"; then
  77        NO_[]GIT_UC_PACKAGE=
  78    else
  79        NO_[]GIT_UC_PACKAGE=
  80        GIT_UC_PACKAGE[]DIR=$withval
  81        AC_MSG_NOTICE([Setting GIT_UC_PACKAGE[]DIR to $withval])
  82        GIT_CONF_SUBST(GIT_UC_PACKAGE[DIR], [$withval])
  83    fi
  84    m4_popdef([GIT_UC_PACKAGE])])
  85
  86# GIT_PARSE_WITH_SET_MAKE_VAR(WITHNAME, VAR, HELP_TEXT)
  87# -----------------------------------------------------
  88# Set VAR to the value specied by --with-WITHNAME.
  89# No verification of arguments is performed, but warnings are issued
  90# if either 'yes' or 'no' is specified.
  91# HELP_TEXT is presented when --help is called.
  92# This is a direct way to allow setting variables in the Makefile.
  93AC_DEFUN([GIT_PARSE_WITH_SET_MAKE_VAR],
  94[AC_ARG_WITH([$1],
  95 [AS_HELP_STRING([--with-$1=VALUE], $3)],
  96 if test -n "$withval"; then
  97  if test "$withval" = "yes" -o "$withval" = "no"; then
  98    AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
  99                     [a value for $1 ($2).  Maybe you do...?])
 100  fi
 101  AC_MSG_NOTICE([Setting $2 to $withval])
 102  GIT_CONF_SUBST([$2], [$withval])
 103 fi)])# GIT_PARSE_WITH_SET_MAKE_VAR
 104
 105#
 106# GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
 107# -----------------------------------------
 108# Similar to AC_CHECK_FUNC, but on systems that do not generate
 109# warnings for missing prototypes (e.g. FreeBSD when compiling without
 110# -Wall), it does not work.  By looking for function definition in
 111# libraries, this problem can be worked around.
 112AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
 113  AC_SEARCH_LIBS([$1],,
 114  [$2],[$3])
 115],[$3])])
 116
 117#
 118# GIT_STASH_FLAGS(BASEPATH_VAR)
 119# -----------------------------
 120# Allow for easy stashing of LDFLAGS and CPPFLAGS before running
 121# tests that may want to take user settings into account.
 122AC_DEFUN([GIT_STASH_FLAGS],[
 123if test -n "$1"; then
 124   old_CPPFLAGS="$CPPFLAGS"
 125   old_LDFLAGS="$LDFLAGS"
 126   CPPFLAGS="-I$1/include $CPPFLAGS"
 127   LDFLAGS="-L$1/$lib $LDFLAGS"
 128fi
 129])
 130
 131dnl
 132dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
 133dnl -----------------------------
 134dnl Restore the stashed *FLAGS values.
 135AC_DEFUN([GIT_UNSTASH_FLAGS],[
 136if test -n "$1"; then
 137   CPPFLAGS="$old_CPPFLAGS"
 138   LDFLAGS="$old_LDFLAGS"
 139fi
 140])
 141
 142## Configure body starts here.
 143
 144AC_PREREQ(2.59)
 145AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])
 146
 147AC_CONFIG_SRCDIR([git.c])
 148
 149config_file=config.mak.autogen
 150config_in=config.mak.in
 151
 152GIT_CONF_SUBST([AUTOCONFIGURED], [YesPlease])
 153
 154# Directories holding "saner" versions of common or POSIX binaries.
 155AC_ARG_WITH([sane-tool-path],
 156  [AS_HELP_STRING(
 157    [--with-sane-tool-path=DIR-1[[:DIR-2...:DIR-n]]],
 158    [Directories to prepend to PATH in build system and generated scripts])],
 159  [if test "$withval" = "no"; then
 160    withval=''
 161  else
 162    AC_MSG_NOTICE([Setting SANE_TOOL_PATH to '$withval'])
 163  fi
 164  GIT_CONF_SUBST([SANE_TOOL_PATH], [$withval])],
 165  [# If the "--with-sane-tool-path" option was not given, don't touch
 166   # SANE_TOOL_PATH here, but let defaults in Makefile take care of it.
 167   # This should minimize spurious differences in the behaviour of the
 168   # Git build system when configure is used w.r.t. when it is not.
 169   :])
 170
 171## Site configuration related to programs (before tests)
 172## --with-PACKAGE[=ARG] and --without-PACKAGE
 173#
 174# Set lib to alternative name of lib directory (e.g. lib64)
 175AC_ARG_WITH([lib],
 176 [AS_HELP_STRING([--with-lib=ARG],
 177                 [ARG specifies alternative name for lib directory])],
 178 [if test "$withval" = "no" || test "$withval" = "yes"; then
 179        AC_MSG_WARN([You should provide name for --with-lib=ARG])
 180  else
 181        lib=$withval
 182        AC_MSG_NOTICE([Setting lib to '$lib'])
 183        GIT_CONF_SUBST([lib])
 184  fi])
 185
 186if test -z "$lib"; then
 187   AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
 188   lib=lib
 189fi
 190
 191AC_ARG_ENABLE([pthreads],
 192 [AS_HELP_STRING([--enable-pthreads=FLAGS],
 193  [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
 194  [The default if FLAGS is not specified is to try first -pthread]
 195  [and then -lpthread.]
 196  [--disable-pthreads will disable threading.])],
 197[
 198if test "x$enableval" = "xyes"; then
 199   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
 200elif test "x$enableval" != "xno"; then
 201   PTHREAD_CFLAGS=$enableval
 202   AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
 203else
 204   AC_MSG_NOTICE([POSIX Threads will be disabled.])
 205   NO_PTHREADS=YesPlease
 206   USER_NOPTHREAD=1
 207fi],
 208[
 209   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads.])
 210])
 211
 212# Define option to enable JavaScript minification
 213AC_ARG_ENABLE([jsmin],
 214[AS_HELP_STRING([--enable-jsmin=PATH],
 215  [PATH is the name of a JavaScript minifier or the absolute path to one.])],
 216[
 217  JSMIN=$enableval;
 218  AC_MSG_NOTICE([Setting JSMIN to '$JSMIN' to enable JavaScript minifying])
 219  GIT_CONF_SUBST([JSMIN])
 220])
 221
 222# Define option to enable CSS minification
 223AC_ARG_ENABLE([cssmin],
 224[AS_HELP_STRING([--enable-cssmin=PATH],
 225  [PATH is the name of a CSS minifier or the absolute path to one.])],
 226[
 227  CSSMIN=$enableval;
 228  AC_MSG_NOTICE([Setting CSSMIN to '$CSSMIN' to enable CSS minifying])
 229  GIT_CONF_SUBST([CSSMIN])
 230])
 231
 232## Site configuration (override autodetection)
 233## --with-PACKAGE[=ARG] and --without-PACKAGE
 234AC_MSG_NOTICE([CHECKS for site configuration])
 235#
 236# Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
 237# tests.  These tests take up a significant amount of the total test time
 238# but are not needed unless you plan to talk to SVN repos.
 239#
 240# Define PPC_SHA1 environment variable when running make to make use of
 241# a bundled SHA1 routine optimized for PowerPC.
 242#
 243# Define NO_OPENSSL environment variable if you do not have OpenSSL.
 244# This also implies BLK_SHA1.
 245#
 246# Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
 247# /foo/bar/include and /foo/bar/lib directories.
 248AC_ARG_WITH(openssl,
 249AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
 250AS_HELP_STRING([],              [ARG can be prefix for openssl library and headers]),
 251GIT_PARSE_WITH([openssl]))
 252
 253# Define USE_LIBPCRE if you have and want to use libpcre. git-grep will be
 254# able to use Perl-compatible regular expressions.
 255#
 256# Define LIBPCREDIR=/foo/bar if your libpcre header and library files are in
 257# /foo/bar/include and /foo/bar/lib directories.
 258#
 259AC_ARG_WITH(libpcre,
 260AS_HELP_STRING([--with-libpcre],[support Perl-compatible regexes (default is NO)])
 261AS_HELP_STRING([],           [ARG can be also prefix for libpcre library and headers]),
 262    if test "$withval" = "no"; then
 263        USE_LIBPCRE=
 264    elif test "$withval" = "yes"; then
 265        USE_LIBPCRE=YesPlease
 266    else
 267        USE_LIBPCRE=YesPlease
 268        LIBPCREDIR=$withval
 269        AC_MSG_NOTICE([Setting LIBPCREDIR to $LIBPCREDIR])
 270        dnl USE_LIBPCRE can still be modified below, so don't substitute
 271        dnl it yet.
 272        GIT_CONF_SUBST([LIBPCREDIR])
 273    fi)
 274#
 275# Define HAVE_ALLOCA_H if you have working alloca(3) defined in that header.
 276AC_FUNC_ALLOCA
 277case $ac_cv_working_alloca_h in
 278    yes)    HAVE_ALLOCA_H=YesPlease;;
 279    *)      HAVE_ALLOCA_H='';;
 280esac
 281GIT_CONF_SUBST([HAVE_ALLOCA_H])
 282#
 283# Define NO_CURL if you do not have curl installed.  git-http-pull and
 284# git-http-push are not built, and you cannot use http:// and https://
 285# transports.
 286#
 287# Define CURLDIR=/foo/bar if your curl header and library files are in
 288# /foo/bar/include and /foo/bar/lib directories.
 289AC_ARG_WITH(curl,
 290AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
 291AS_HELP_STRING([],           [ARG can be also prefix for curl library and headers]),
 292GIT_PARSE_WITH(curl))
 293#
 294# Define NO_EXPAT if you do not have expat installed.  git-http-push is
 295# not built, and you cannot push using http:// and https:// transports.
 296#
 297# Define EXPATDIR=/foo/bar if your expat header and library files are in
 298# /foo/bar/include and /foo/bar/lib directories.
 299AC_ARG_WITH(expat,
 300AS_HELP_STRING([--with-expat],
 301[support git-push using http:// and https:// transports via WebDAV (default is YES)])
 302AS_HELP_STRING([],            [ARG can be also prefix for expat library and headers]),
 303GIT_PARSE_WITH(expat))
 304#
 305# Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
 306# installed in /sw, but don't want GIT to link against any libraries
 307# installed there.  If defined you may specify your own (or Fink's)
 308# include directories and library directories by defining CFLAGS
 309# and LDFLAGS appropriately.
 310#
 311# Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
 312# have DarwinPorts installed in /opt/local, but don't want GIT to
 313# link against any libraries installed there.  If defined you may
 314# specify your own (or DarwinPort's) include directories and
 315# library directories by defining CFLAGS and LDFLAGS appropriately.
 316#
 317# Define NO_MMAP if you want to avoid mmap.
 318#
 319# Define NO_ICONV if your libc does not properly support iconv.
 320AC_ARG_WITH(iconv,
 321AS_HELP_STRING([--without-iconv],
 322[if your architecture doesn't properly support iconv])
 323AS_HELP_STRING([--with-iconv=PATH],
 324[PATH is prefix for libiconv library and headers])
 325AS_HELP_STRING([],
 326[used only if you need linking with libiconv]),
 327GIT_PARSE_WITH(iconv))
 328
 329## --enable-FEATURE[=ARG] and --disable-FEATURE
 330#
 331# Define USE_NSEC below if you want git to care about sub-second file mtimes
 332# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
 333# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
 334# randomly break unless your underlying filesystem supports those sub-second
 335# times (my ext3 doesn't).
 336#
 337# Define USE_STDEV below if you want git to care about the underlying device
 338# change being considered an inode change from the update-index perspective.
 339
 340#
 341# Allow user to set ETC_GITCONFIG variable
 342GIT_PARSE_WITH_SET_MAKE_VAR(gitconfig, ETC_GITCONFIG,
 343                        Use VALUE instead of /etc/gitconfig as the
 344                        global git configuration file.
 345                        If VALUE is not fully qualified it will be interpreted
 346                        as a path relative to the computed prefix at runtime.)
 347
 348#
 349# Allow user to set ETC_GITATTRIBUTES variable
 350GIT_PARSE_WITH_SET_MAKE_VAR(gitattributes, ETC_GITATTRIBUTES,
 351                        Use VALUE instead of /etc/gitattributes as the
 352                        global git attributes file.
 353                        If VALUE is not fully qualified it will be interpreted
 354                        as a path relative to the computed prefix at runtime.)
 355
 356#
 357# Allow user to set the default pager
 358GIT_PARSE_WITH_SET_MAKE_VAR(pager, DEFAULT_PAGER,
 359                        Use VALUE as the fall-back pager instead of 'less'.
 360                        This is used by things like 'git log' when the user
 361                        does not specify a pager to use through alternate
 362                        methods. eg: /usr/bin/pager)
 363#
 364# Allow user to set the default editor
 365GIT_PARSE_WITH_SET_MAKE_VAR(editor, DEFAULT_EDITOR,
 366                        Use VALUE as the fall-back editor instead of 'vi'.
 367                        This is used by things like 'git commit' when the user
 368                        does not specify a preferred editor through other
 369                        methods. eg: /usr/bin/editor)
 370
 371#
 372# Define SHELL_PATH to provide path to shell.
 373GIT_ARG_SET_PATH(shell)
 374#
 375# Define PERL_PATH to provide path to Perl.
 376GIT_ARG_SET_PATH(perl)
 377#
 378# Define PYTHON_PATH to provide path to Python.
 379GIT_ARG_SET_PATH(python, allow-without)
 380#
 381# Define ZLIB_PATH to provide path to zlib.
 382GIT_ARG_SET_PATH(zlib)
 383#
 384# Declare the with-tcltk/without-tcltk options.
 385AC_ARG_WITH(tcltk,
 386AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
 387AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
 388AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
 389AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),
 390GIT_PARSE_WITH(tcltk))
 391#
 392
 393
 394## Checks for programs.
 395AC_MSG_NOTICE([CHECKS for programs])
 396#
 397AC_PROG_CC([cc gcc])
 398AC_C_INLINE
 399case $ac_cv_c_inline in
 400  inline | yes | no) INLINE='';;
 401  *)                 INLINE=$ac_cv_c_inline ;;
 402esac
 403GIT_CONF_SUBST([INLINE])
 404
 405# which switch to pass runtime path to dynamic libraries to the linker
 406AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
 407   SAVE_LDFLAGS="${LDFLAGS}"
 408   LDFLAGS="${SAVE_LDFLAGS} -R /"
 409   AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
 410   LDFLAGS="${SAVE_LDFLAGS}"
 411])
 412if test "$git_cv_ld_dashr" = "yes"; then
 413   CC_LD_DYNPATH=-R
 414else
 415   AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
 416      SAVE_LDFLAGS="${LDFLAGS}"
 417      LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
 418      AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
 419      LDFLAGS="${SAVE_LDFLAGS}"
 420   ])
 421   if test "$git_cv_ld_wl_rpath" = "yes"; then
 422      CC_LD_DYNPATH=-Wl,-rpath,
 423   else
 424      AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
 425         SAVE_LDFLAGS="${LDFLAGS}"
 426         LDFLAGS="${SAVE_LDFLAGS} -rpath /"
 427         AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
 428         LDFLAGS="${SAVE_LDFLAGS}"
 429      ])
 430      if test "$git_cv_ld_rpath" = "yes"; then
 431         CC_LD_DYNPATH=-rpath
 432      else
 433         CC_LD_DYNPATH=
 434         AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
 435      fi
 436   fi
 437fi
 438GIT_CONF_SUBST([CC_LD_DYNPATH])
 439#AC_PROG_INSTALL                # needs install-sh or install.sh in sources
 440AC_CHECK_TOOLS(AR, [gar ar], :)
 441AC_CHECK_PROGS(TAR, [gtar tar])
 442AC_CHECK_PROGS(DIFF, [gnudiff gdiff diff])
 443# TCLTK_PATH will be set to some value if we want Tcl/Tk
 444# or will be empty otherwise.
 445if test -n "$NO_TCLTK"; then
 446  TCLTK_PATH=
 447else
 448  if test "$with_tcltk" = ""; then
 449  # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
 450    TCLTK_PATH=wish
 451  elif test "$with_tcltk" = "yes"; then
 452  # Tcl/Tk check requested.
 453    AC_CHECK_PROGS(TCLTK_PATH, [wish], )
 454  else
 455    AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
 456    TCLTK_PATH="$with_tcltk"
 457  fi
 458fi
 459GIT_CONF_SUBST([TCLTK_PATH])
 460AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
 461if test -n "$ASCIIDOC"; then
 462        AC_MSG_CHECKING([for asciidoc version])
 463        asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
 464        case "${asciidoc_version}" in
 465        asciidoc' '8*)
 466                AC_MSG_RESULT([${asciidoc_version}])
 467                ;;
 468        *)
 469                AC_MSG_RESULT([${asciidoc_version} (unknown)])
 470                ;;
 471        esac
 472fi
 473
 474if grep -a ascii configure.ac >/dev/null; then
 475  AC_MSG_RESULT([Using 'grep -a' for sane_grep])
 476  SANE_TEXT_GREP=-a
 477else
 478  SANE_TEXT_GREP=
 479fi
 480GIT_CONF_SUBST([SANE_TEXT_GREP])
 481
 482## Checks for libraries.
 483AC_MSG_NOTICE([CHECKS for libraries])
 484#
 485# Define NO_OPENSSL environment variable if you do not have OpenSSL.
 486# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
 487
 488GIT_STASH_FLAGS($OPENSSLDIR)
 489
 490AC_CHECK_LIB([crypto], [SHA1_Init],
 491[NEEDS_SSL_WITH_CRYPTO=],
 492[AC_CHECK_LIB([ssl], [SHA1_Init],
 493 [NEEDS_SSL_WITH_CRYPTO=YesPlease NO_OPENSSL=],
 494 [NEEDS_SSL_WITH_CRYPTO=          NO_OPENSSL=YesPlease])])
 495
 496GIT_UNSTASH_FLAGS($OPENSSLDIR)
 497
 498GIT_CONF_SUBST([NEEDS_SSL_WITH_CRYPTO])
 499GIT_CONF_SUBST([NO_OPENSSL])
 500
 501#
 502# Define USE_LIBPCRE if you have and want to use libpcre. git-grep will be
 503# able to use Perl-compatible regular expressions.
 504#
 505
 506if test -n "$USE_LIBPCRE"; then
 507
 508GIT_STASH_FLAGS($LIBPCREDIR)
 509
 510AC_CHECK_LIB([pcre], [pcre_version],
 511[USE_LIBPCRE=YesPlease],
 512[USE_LIBPCRE=])
 513
 514GIT_UNSTASH_FLAGS($LIBPCREDIR)
 515
 516GIT_CONF_SUBST([USE_LIBPCRE])
 517
 518fi
 519
 520#
 521# Define NO_CURL if you do not have libcurl installed.  git-http-pull and
 522# git-http-push are not built, and you cannot use http:// and https://
 523# transports.
 524
 525GIT_STASH_FLAGS($CURLDIR)
 526
 527AC_CHECK_LIB([curl], [curl_global_init],
 528[NO_CURL=],
 529[NO_CURL=YesPlease])
 530
 531if test -z "${NO_CURL}" && test -z "${NO_OPENSSL}"; then
 532
 533AC_CHECK_LIB([curl], [Curl_ssl_init],
 534[NEEDS_SSL_WITH_CURL=YesPlease],
 535[NEEDS_SSL_WITH_CURL=])
 536
 537GIT_CONF_SUBST([NEEDS_SSL_WITH_CURL])
 538
 539fi
 540
 541GIT_UNSTASH_FLAGS($CURLDIR)
 542
 543GIT_CONF_SUBST([NO_CURL])
 544
 545if test -z "$NO_CURL"; then
 546
 547AC_CHECK_PROG([CURL_CONFIG], [curl-config],
 548[curl-config],
 549[no])
 550
 551if test $CURL_CONFIG != no; then
 552    GIT_CONF_SUBST([CURL_CONFIG])
 553fi
 554
 555fi
 556
 557
 558#
 559# Define NO_EXPAT if you do not have expat installed.  git-http-push is
 560# not built, and you cannot push using http:// and https:// transports.
 561
 562GIT_STASH_FLAGS($EXPATDIR)
 563
 564AC_CHECK_LIB([expat], [XML_ParserCreate],
 565[NO_EXPAT=],
 566[NO_EXPAT=YesPlease])
 567
 568GIT_UNSTASH_FLAGS($EXPATDIR)
 569
 570GIT_CONF_SUBST([NO_EXPAT])
 571
 572#
 573# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
 574# some Solaris installations).
 575# Define NO_ICONV if neither libc nor libiconv support iconv.
 576
 577if test -z "$NO_ICONV"; then
 578
 579GIT_STASH_FLAGS($ICONVDIR)
 580
 581AC_DEFUN([ICONVTEST_SRC],
 582[AC_LANG_PROGRAM([#include <iconv.h>],
 583 [iconv_open("", "");])])
 584
 585if test -n "$ICONVDIR"; then
 586   lib_order="-liconv -lc"
 587else
 588   lib_order="-lc -liconv"
 589fi
 590
 591NO_ICONV=YesPlease
 592
 593for l in $lib_order; do
 594    if test "$l" = "-liconv"; then
 595       NEEDS_LIBICONV=YesPlease
 596    else
 597       NEEDS_LIBICONV=
 598    fi
 599
 600    old_LIBS="$LIBS"
 601    LIBS="$LIBS $l"
 602    AC_MSG_CHECKING([for iconv in $l])
 603    AC_LINK_IFELSE([ICONVTEST_SRC],
 604        [AC_MSG_RESULT([yes])
 605        NO_ICONV=
 606        break],
 607        [AC_MSG_RESULT([no])])
 608    LIBS="$old_LIBS"
 609done
 610
 611#in case of break
 612LIBS="$old_LIBS"
 613
 614GIT_UNSTASH_FLAGS($ICONVDIR)
 615
 616GIT_CONF_SUBST([NEEDS_LIBICONV])
 617GIT_CONF_SUBST([NO_ICONV])
 618
 619if test -n "$NO_ICONV"; then
 620    NEEDS_LIBICONV=
 621fi
 622
 623fi
 624
 625#
 626# Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
 627
 628GIT_STASH_FLAGS($ZLIB_PATH)
 629
 630AC_DEFUN([ZLIBTEST_SRC], [
 631AC_LANG_PROGRAM([#include <zlib.h>],
 632 [deflateBound(0, 0);])])
 633AC_MSG_CHECKING([for deflateBound in -lz])
 634old_LIBS="$LIBS"
 635LIBS="$LIBS -lz"
 636AC_LINK_IFELSE([ZLIBTEST_SRC],
 637        [AC_MSG_RESULT([yes])],
 638        [AC_MSG_RESULT([no])
 639        NO_DEFLATE_BOUND=yes])
 640LIBS="$old_LIBS"
 641
 642GIT_UNSTASH_FLAGS($ZLIB_PATH)
 643
 644GIT_CONF_SUBST([NO_DEFLATE_BOUND])
 645
 646#
 647# Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
 648# Patrick Mauritz).
 649AC_CHECK_LIB([c], [socket],
 650[NEEDS_SOCKET=],
 651[NEEDS_SOCKET=YesPlease])
 652GIT_CONF_SUBST([NEEDS_SOCKET])
 653test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
 654
 655#
 656# The next few tests will define NEEDS_RESOLV if linking with
 657# libresolv provides some of the functions we would normally get
 658# from libc.
 659NEEDS_RESOLV=
 660#
 661# Define NO_INET_NTOP if linking with -lresolv is not enough.
 662# Solaris 2.7 in particular hos inet_ntop in -lresolv.
 663NO_INET_NTOP=
 664AC_CHECK_FUNC([inet_ntop],
 665    [],
 666    [AC_CHECK_LIB([resolv], [inet_ntop],
 667        [NEEDS_RESOLV=YesPlease],
 668        [NO_INET_NTOP=YesPlease])
 669])
 670GIT_CONF_SUBST([NO_INET_NTOP])
 671#
 672# Define NO_INET_PTON if linking with -lresolv is not enough.
 673# Solaris 2.7 in particular hos inet_pton in -lresolv.
 674NO_INET_PTON=
 675AC_CHECK_FUNC([inet_pton],
 676    [],
 677    [AC_CHECK_LIB([resolv], [inet_pton],
 678        [NEEDS_RESOLV=YesPlease],
 679        [NO_INET_PTON=YesPlease])
 680])
 681GIT_CONF_SUBST([NO_INET_PTON])
 682#
 683# Define NO_HSTRERROR if linking with -lresolv is not enough.
 684# Solaris 2.6 in particular has no hstrerror, even in -lresolv.
 685NO_HSTRERROR=
 686AC_CHECK_FUNC([hstrerror],
 687    [],
 688    [AC_CHECK_LIB([resolv], [hstrerror],
 689        [NEEDS_RESOLV=YesPlease],
 690        [NO_HSTRERROR=YesPlease])
 691])
 692GIT_CONF_SUBST([NO_HSTRERROR])
 693
 694dnl This must go after all the possible places for its initialization,
 695dnl in the AC_CHECK_FUNC invocations above.
 696GIT_CONF_SUBST([NEEDS_RESOLV])
 697#
 698# If any of the above tests determined that -lresolv is needed at
 699# build-time, also set it here for remaining configure-time checks.
 700test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
 701
 702AC_CHECK_LIB([c], [basename],
 703[NEEDS_LIBGEN=],
 704[NEEDS_LIBGEN=YesPlease])
 705GIT_CONF_SUBST([NEEDS_LIBGEN])
 706test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
 707
 708AC_CHECK_LIB([c], [gettext],
 709[LIBC_CONTAINS_LIBINTL=YesPlease],
 710[LIBC_CONTAINS_LIBINTL=])
 711GIT_CONF_SUBST([LIBC_CONTAINS_LIBINTL])
 712
 713#
 714# Define NO_GETTEXT if you don't want Git output to be translated.
 715# A translated Git requires GNU libintl or another gettext implementation
 716AC_CHECK_HEADER([libintl.h],
 717[NO_GETTEXT=],
 718[NO_GETTEXT=YesPlease])
 719GIT_CONF_SUBST([NO_GETTEXT])
 720
 721if test -z "$NO_GETTEXT"; then
 722    test -n "$LIBC_CONTAINS_LIBINTL" || LIBS="$LIBS -lintl"
 723fi
 724
 725## Checks for header files.
 726AC_MSG_NOTICE([CHECKS for header files])
 727#
 728# Define NO_SYS_SELECT_H if you don't have sys/select.h.
 729AC_CHECK_HEADER([sys/select.h],
 730[NO_SYS_SELECT_H=],
 731[NO_SYS_SELECT_H=UnfortunatelyYes])
 732GIT_CONF_SUBST([NO_SYS_SELECT_H])
 733#
 734# Define NO_SYS_POLL_H if you don't have sys/poll.h
 735AC_CHECK_HEADER([sys/poll.h],
 736[NO_SYS_POLL_H=],
 737[NO_SYS_POLL_H=UnfortunatelyYes])
 738GIT_CONF_SUBST([NO_SYS_POLL_H])
 739#
 740# Define NO_INTTYPES_H if you don't have inttypes.h
 741AC_CHECK_HEADER([inttypes.h],
 742[NO_INTTYPES_H=],
 743[NO_INTTYPES_H=UnfortunatelyYes])
 744GIT_CONF_SUBST([NO_INTTYPES_H])
 745#
 746# Define OLD_ICONV if your library has an old iconv(), where the second
 747# (input buffer pointer) parameter is declared with type (const char **).
 748AC_DEFUN([OLDICONVTEST_SRC], [
 749AC_LANG_PROGRAM([[
 750#include <iconv.h>
 751
 752extern size_t iconv(iconv_t cd,
 753                    char **inbuf, size_t *inbytesleft,
 754                    char **outbuf, size_t *outbytesleft);
 755]], [])])
 756
 757GIT_STASH_FLAGS($ICONVDIR)
 758
 759AC_MSG_CHECKING([for old iconv()])
 760AC_COMPILE_IFELSE([OLDICONVTEST_SRC],
 761        [AC_MSG_RESULT([no])],
 762        [AC_MSG_RESULT([yes])
 763        OLD_ICONV=UnfortunatelyYes])
 764
 765GIT_UNSTASH_FLAGS($ICONVDIR)
 766
 767GIT_CONF_SUBST([OLD_ICONV])
 768
 769## Checks for typedefs, structures, and compiler characteristics.
 770AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
 771#
 772TYPE_SOCKLEN_T
 773case $ac_cv_type_socklen_t in
 774  yes)  SOCKLEN_T='';;
 775  *)    SOCKLEN_T=$git_cv_socklen_t_equiv;;
 776esac
 777GIT_CONF_SUBST([SOCKLEN_T])
 778
 779#
 780# Define NO_STRUCT_ITIMERVAL if you don't have struct itimerval.
 781AC_CHECK_TYPES([struct itimerval],
 782[NO_STRUCT_ITIMERVAL=],
 783[NO_STRUCT_ITIMERVAL=UnfortunatelyYes],
 784[#include <sys/time.h>])
 785GIT_CONF_SUBST([NO_STRUCT_ITIMERVAL])
 786#
 787# Define USE_ST_TIMESPEC=YesPlease when stat.st_mtimespec.tv_nsec exists.
 788# Define NO_NSEC=YesPlease when neither stat.st_mtim.tv_nsec nor
 789# stat.st_mtimespec.tv_nsec exists.
 790AC_CHECK_MEMBER([struct stat.st_mtimespec.tv_nsec])
 791AC_CHECK_MEMBER([struct stat.st_mtim.tv_nsec])
 792if test x$ac_cv_member_struct_stat_st_mtimespec_tv_nsec = xyes; then
 793        USE_ST_TIMESPEC=YesPlease
 794        GIT_CONF_SUBST([USE_ST_TIMESPEC])
 795elif test x$ac_cv_member_struct_stat_st_mtim_tv_nsec != xyes; then
 796        NO_NSEC=YesPlease
 797        GIT_CONF_SUBST([NO_NSEC])
 798fi
 799#
 800# Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
 801# d_type in struct dirent (latest Cygwin -- will be fixed soonish).
 802AC_CHECK_MEMBER(struct dirent.d_type,
 803[NO_D_TYPE_IN_DIRENT=],
 804[NO_D_TYPE_IN_DIRENT=YesPlease],
 805[#include <dirent.h>])
 806GIT_CONF_SUBST([NO_D_TYPE_IN_DIRENT])
 807#
 808# Define NO_GECOS_IN_PWENT if you don't have pw_gecos in struct passwd
 809# in the C library.
 810AC_CHECK_MEMBER(struct passwd.pw_gecos,
 811[NO_GECOS_IN_PWENT=],
 812[NO_GECOS_IN_PWENT=YesPlease],
 813[#include <pwd.h>])
 814GIT_CONF_SUBST([NO_GECOS_IN_PWENT])
 815#
 816# Define NO_SOCKADDR_STORAGE if your platform does not have struct
 817# sockaddr_storage.
 818AC_CHECK_TYPE(struct sockaddr_storage,
 819[NO_SOCKADDR_STORAGE=],
 820[NO_SOCKADDR_STORAGE=YesPlease],[
 821#include <sys/types.h>
 822#include <sys/socket.h>
 823])
 824GIT_CONF_SUBST([NO_SOCKADDR_STORAGE])
 825#
 826# Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
 827AC_CHECK_TYPE([struct addrinfo],[
 828 GIT_CHECK_FUNC([getaddrinfo],
 829  [NO_IPV6=],
 830  [NO_IPV6=YesPlease])
 831],[NO_IPV6=YesPlease],[
 832#include <sys/types.h>
 833#include <sys/socket.h>
 834#include <netdb.h>
 835])
 836GIT_CONF_SUBST([NO_IPV6])
 837#
 838# Define NO_REGEX if you have no or inferior regex support in your C library.
 839AC_CACHE_CHECK([whether the platform regex can handle null bytes],
 840 [ac_cv_c_excellent_regex], [
 841AC_EGREP_CPP(yippeeyeswehaveit,
 842        AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
 843#include <regex.h>
 844],
 845[#ifdef REG_STARTEND
 846yippeeyeswehaveit
 847#endif
 848]),
 849        [ac_cv_c_excellent_regex=yes],
 850        [ac_cv_c_excellent_regex=no])
 851])
 852if test $ac_cv_c_excellent_regex = yes; then
 853        NO_REGEX=
 854else
 855        NO_REGEX=YesPlease
 856fi
 857GIT_CONF_SUBST([NO_REGEX])
 858#
 859# Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
 860# when attempting to read from an fopen'ed directory.
 861AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
 862 [ac_cv_fread_reads_directories],
 863[
 864AC_RUN_IFELSE(
 865        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
 866                [[char c;
 867                FILE *f = fopen(".", "r");
 868                return f && fread(&c, 1, 1, f)]])],
 869        [ac_cv_fread_reads_directories=no],
 870        [ac_cv_fread_reads_directories=yes])
 871])
 872if test $ac_cv_fread_reads_directories = yes; then
 873        FREAD_READS_DIRECTORIES=UnfortunatelyYes
 874else
 875        FREAD_READS_DIRECTORIES=
 876fi
 877GIT_CONF_SUBST([FREAD_READS_DIRECTORIES])
 878#
 879# Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
 880# or vsnprintf() return -1 instead of number of characters which would
 881# have been written to the final string if enough space had been available.
 882AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
 883 [ac_cv_snprintf_returns_bogus],
 884[
 885AC_RUN_IFELSE(
 886        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
 887                #include "stdarg.h"
 888
 889                int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
 890                {
 891                  int ret;
 892                  va_list ap;
 893                  va_start(ap, format);
 894                  ret = vsnprintf(str, maxsize, format, ap);
 895                  va_end(ap);
 896                  return ret;
 897                }],
 898                [[char buf[6];
 899                  if (test_vsnprintf(buf, 3, "%s", "12345") != 5
 900                      || strcmp(buf, "12")) return 1;
 901                  if (snprintf(buf, 3, "%s", "12345") != 5
 902                      || strcmp(buf, "12")) return 1]])],
 903        [ac_cv_snprintf_returns_bogus=no],
 904        [ac_cv_snprintf_returns_bogus=yes])
 905])
 906if test $ac_cv_snprintf_returns_bogus = yes; then
 907        SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
 908else
 909        SNPRINTF_RETURNS_BOGUS=
 910fi
 911GIT_CONF_SUBST([SNPRINTF_RETURNS_BOGUS])
 912#
 913# Define NEEDS_MODE_TRANSLATION if your OS strays from the typical file type
 914# bits in mode values.
 915AC_CACHE_CHECK([whether the platform uses typical file type bits],
 916 [ac_cv_sane_mode_bits], [
 917AC_EGREP_CPP(yippeeyeswehaveit,
 918        AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
 919[#if S_IFMT == 0170000 && \
 920        S_IFREG == 0100000 && S_IFDIR == 0040000 && S_IFLNK == 0120000 && \
 921        S_IFBLK == 0060000 && S_IFCHR == 0020000 && \
 922        S_IFIFO == 0010000 && S_IFSOCK == 0140000
 923yippeeyeswehaveit
 924#endif
 925]),
 926        [ac_cv_sane_mode_bits=yes],
 927        [ac_cv_sane_mode_bits=no])
 928])
 929if test $ac_cv_sane_mode_bits = yes; then
 930        NEEDS_MODE_TRANSLATION=
 931else
 932        NEEDS_MODE_TRANSLATION=UnfortunatelyYes
 933fi
 934GIT_CONF_SUBST([NEEDS_MODE_TRANSLATION])
 935
 936
 937## Checks for library functions.
 938## (in default C library and libraries checked by AC_CHECK_LIB)
 939AC_MSG_NOTICE([CHECKS for library functions])
 940#
 941# Define NO_LIBGEN_H if you don't have libgen.h.
 942AC_CHECK_HEADER([libgen.h],
 943[NO_LIBGEN_H=],
 944[NO_LIBGEN_H=YesPlease])
 945GIT_CONF_SUBST([NO_LIBGEN_H])
 946#
 947# Define HAVE_PATHS_H if you have paths.h.
 948AC_CHECK_HEADER([paths.h],
 949[HAVE_PATHS_H=YesPlease],
 950[HAVE_PATHS_H=])
 951GIT_CONF_SUBST([HAVE_PATHS_H])
 952#
 953# Define HAVE_LIBCHARSET_H if have libcharset.h
 954AC_CHECK_HEADER([libcharset.h],
 955[HAVE_LIBCHARSET_H=YesPlease],
 956[HAVE_LIBCHARSET_H=])
 957GIT_CONF_SUBST([HAVE_LIBCHARSET_H])
 958#
 959# Define HAVE_STRINGS_H if you have strings.h
 960AC_CHECK_HEADER([strings.h],
 961[HAVE_STRINGS_H=YesPlease],
 962[HAVE_STRINGS_H=])
 963GIT_CONF_SUBST([HAVE_STRINGS_H])
 964# Define CHARSET_LIB if libiconv does not export the locale_charset symbol
 965# and libcharset does
 966CHARSET_LIB=
 967AC_CHECK_LIB([iconv], [locale_charset],
 968       [CHARSET_LIB=-liconv],
 969       [AC_CHECK_LIB([charset], [locale_charset],
 970                     [CHARSET_LIB=-lcharset])])
 971GIT_CONF_SUBST([CHARSET_LIB])
 972#
 973# Define HAVE_CLOCK_GETTIME=YesPlease if clock_gettime is available.
 974GIT_CHECK_FUNC(clock_gettime,
 975        [HAVE_CLOCK_GETTIME=YesPlease],
 976        [HAVE_CLOCK_GETTIME=])
 977GIT_CONF_SUBST([HAVE_CLOCK_GETTIME])
 978
 979AC_DEFUN([CLOCK_MONOTONIC_SRC], [
 980AC_LANG_PROGRAM([[
 981#include <time.h>
 982clockid_t id = CLOCK_MONOTONIC;
 983]])])
 984
 985#
 986# Define HAVE_CLOCK_MONOTONIC=YesPlease if CLOCK_MONOTONIC is available.
 987AC_MSG_CHECKING([for CLOCK_MONOTONIC])
 988AC_COMPILE_IFELSE([CLOCK_MONOTONIC_SRC],
 989        [AC_MSG_RESULT([yes])
 990        HAVE_CLOCK_MONOTONIC=YesPlease],
 991        [AC_MSG_RESULT([no])
 992        HAVE_CLOCK_MONOTONIC=])
 993GIT_CONF_SUBST([HAVE_CLOCK_MONOTONIC])
 994#
 995# Define NO_SETITIMER if you don't have setitimer.
 996GIT_CHECK_FUNC(setitimer,
 997[NO_SETITIMER=],
 998[NO_SETITIMER=YesPlease])
 999GIT_CONF_SUBST([NO_SETITIMER])
1000#
1001# Define NO_STRCASESTR if you don't have strcasestr.
1002GIT_CHECK_FUNC(strcasestr,
1003[NO_STRCASESTR=],
1004[NO_STRCASESTR=YesPlease])
1005GIT_CONF_SUBST([NO_STRCASESTR])
1006#
1007# Define NO_MEMMEM if you don't have memmem.
1008GIT_CHECK_FUNC(memmem,
1009[NO_MEMMEM=],
1010[NO_MEMMEM=YesPlease])
1011GIT_CONF_SUBST([NO_MEMMEM])
1012#
1013# Define NO_STRLCPY if you don't have strlcpy.
1014GIT_CHECK_FUNC(strlcpy,
1015[NO_STRLCPY=],
1016[NO_STRLCPY=YesPlease])
1017GIT_CONF_SUBST([NO_STRLCPY])
1018#
1019# Define NO_UINTMAX_T if your platform does not have uintmax_t
1020AC_CHECK_TYPE(uintmax_t,
1021[NO_UINTMAX_T=],
1022[NO_UINTMAX_T=YesPlease],[
1023#include <inttypes.h>
1024])
1025GIT_CONF_SUBST([NO_UINTMAX_T])
1026#
1027# Define NO_STRTOUMAX if you don't have strtoumax in the C library.
1028GIT_CHECK_FUNC(strtoumax,
1029[NO_STRTOUMAX=],
1030[NO_STRTOUMAX=YesPlease])
1031GIT_CONF_SUBST([NO_STRTOUMAX])
1032#
1033# Define NO_SETENV if you don't have setenv in the C library.
1034GIT_CHECK_FUNC(setenv,
1035[NO_SETENV=],
1036[NO_SETENV=YesPlease])
1037GIT_CONF_SUBST([NO_SETENV])
1038#
1039# Define NO_UNSETENV if you don't have unsetenv in the C library.
1040GIT_CHECK_FUNC(unsetenv,
1041[NO_UNSETENV=],
1042[NO_UNSETENV=YesPlease])
1043GIT_CONF_SUBST([NO_UNSETENV])
1044#
1045# Define NO_MKDTEMP if you don't have mkdtemp in the C library.
1046GIT_CHECK_FUNC(mkdtemp,
1047[NO_MKDTEMP=],
1048[NO_MKDTEMP=YesPlease])
1049GIT_CONF_SUBST([NO_MKDTEMP])
1050#
1051# Define NO_MKSTEMPS if you don't have mkstemps in the C library.
1052GIT_CHECK_FUNC(mkstemps,
1053[NO_MKSTEMPS=],
1054[NO_MKSTEMPS=YesPlease])
1055GIT_CONF_SUBST([NO_MKSTEMPS])
1056#
1057# Define NO_INITGROUPS if you don't have initgroups in the C library.
1058GIT_CHECK_FUNC(initgroups,
1059[NO_INITGROUPS=],
1060[NO_INITGROUPS=YesPlease])
1061GIT_CONF_SUBST([NO_INITGROUPS])
1062#
1063# Define HAVE_GETDELIM if you have getdelim in the C library.
1064GIT_CHECK_FUNC(getdelim,
1065[HAVE_GETDELIM=YesPlease],
1066[HAVE_GETDELIM=])
1067GIT_CONF_SUBST([HAVE_GETDELIM])
1068#
1069#
1070# Define NO_MMAP if you want to avoid mmap.
1071#
1072# Define NO_ICONV if your libc does not properly support iconv.
1073
1074AC_DEFUN([BSD_SYSCTL_SRC], [
1075AC_LANG_PROGRAM([[
1076#include <stddef.h>
1077#include <sys/types.h>
1078#include <sys/sysctl.h>
1079]],[[
1080int val, mib[2];
1081size_t len;
1082mib[0] = CTL_HW;
1083mib[1] = 1;
1084len = sizeof(val);
1085return sysctl(mib, 2, &val, &len, NULL, 0) ? 1 : 0;
1086]])])
1087
1088#
1089# Define HAVE_BSD_SYSCTL=YesPlease if a BSD-compatible sysctl function is available.
1090AC_MSG_CHECKING([for BSD sysctl])
1091AC_COMPILE_IFELSE([BSD_SYSCTL_SRC],
1092        [AC_MSG_RESULT([yes])
1093        HAVE_BSD_SYSCTL=YesPlease],
1094        [AC_MSG_RESULT([no])
1095        HAVE_BSD_SYSCTL=])
1096GIT_CONF_SUBST([HAVE_BSD_SYSCTL])
1097
1098## Other checks.
1099# Define USE_PIC if you need the main git objects to be built with -fPIC
1100# in order to build and link perl/Git.so.  x86-64 seems to need this.
1101#
1102# Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
1103# Enable it on Windows.  By default, symrefs are still used.
1104#
1105# Define NO_PTHREADS if we do not have pthreads.
1106#
1107# Define PTHREAD_LIBS to the linker flag used for Pthread support.
1108AC_DEFUN([PTHREADTEST_SRC], [
1109AC_LANG_PROGRAM([[
1110#include <pthread.h>
1111static void *noop(void *ignore) { return ignore; }
1112]], [[
1113        pthread_mutex_t test_mutex;
1114        pthread_key_t test_key;
1115        pthread_t th;
1116        int retcode = 0;
1117        void *ret = (void *)0;
1118        retcode |= pthread_key_create(&test_key, (void *)0);
1119        retcode |= pthread_mutex_init(&test_mutex,(void *)0);
1120        retcode |= pthread_mutex_lock(&test_mutex);
1121        retcode |= pthread_mutex_unlock(&test_mutex);
1122        retcode |= pthread_create(&th, ret, noop, ret);
1123        retcode |= pthread_join(th, &ret);
1124        return retcode;
1125]])])
1126
1127dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
1128dnl   [[#include <pthread.h>]],
1129dnl   [[pthread_mutex_t test_mutex;]]
1130dnl )])
1131
1132NO_PTHREADS=UnfortunatelyYes
1133PTHREAD_LIBS=
1134
1135if test -n "$USER_NOPTHREAD"; then
1136   AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
1137# handle these separately since PTHREAD_CFLAGS could be '-lpthreads
1138# -D_REENTRANT' or some such.
1139elif test -z "$PTHREAD_CFLAGS"; then
1140  threads_found=no
1141  # Attempt to compile and link some code using pthreads to determine
1142  # required linker flags. The order is somewhat important here: We
1143  # first try it without any extra flags, to catch systems where
1144  # pthreads are part of the C library, then go on testing various other
1145  # flags. We do so to avoid false positives. For example, on Mac OS X
1146  # pthreads are part of the C library; moreover, the compiler allows us
1147  # to add "-mt" to the CFLAGS (although it will do nothing except
1148  # trigger a warning about an unused flag). Hence if we checked for
1149  # "-mt" before "" we would end up picking it. But unfortunately this
1150  # would then trigger compiler warnings on every single file we compile.
1151  for opt in "" -mt -pthread -lpthread; do
1152     old_CFLAGS="$CFLAGS"
1153     old_LIBS="$LIBS"
1154     case "$opt" in
1155        -l*)  LIBS="$opt $LIBS" ;;
1156        *)    CFLAGS="$opt $CFLAGS" ;;
1157     esac
1158
1159     AC_MSG_CHECKING([for POSIX Threads with '$opt'])
1160     AC_LINK_IFELSE([PTHREADTEST_SRC],
1161        [AC_MSG_RESULT([yes])
1162                NO_PTHREADS=
1163                PTHREAD_LIBS="$opt"
1164                PTHREAD_CFLAGS="$opt"
1165                threads_found=yes
1166                break
1167        ],
1168        [AC_MSG_RESULT([no])])
1169      CFLAGS="$old_CFLAGS"
1170      LIBS="$old_LIBS"
1171  done
1172  if test $threads_found != yes; then
1173    AC_CHECK_LIB([pthread], [pthread_create],
1174        [PTHREAD_LIBS="-lpthread"],
1175        [NO_PTHREADS=UnfortunatelyYes])
1176  fi
1177else
1178  old_CFLAGS="$CFLAGS"
1179  CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
1180  AC_MSG_CHECKING([for POSIX Threads with '$PTHREAD_CFLAGS'])
1181  AC_LINK_IFELSE([PTHREADTEST_SRC],
1182        [AC_MSG_RESULT([yes])
1183                NO_PTHREADS=
1184                PTHREAD_LIBS="$PTHREAD_CFLAGS"
1185        ],
1186        [AC_MSG_RESULT([no])])
1187
1188  CFLAGS="$old_CFLAGS"
1189fi
1190
1191CFLAGS="$old_CFLAGS"
1192
1193GIT_CONF_SUBST([PTHREAD_CFLAGS])
1194GIT_CONF_SUBST([PTHREAD_LIBS])
1195GIT_CONF_SUBST([NO_PTHREADS])
1196
1197## Output files
1198AC_CONFIG_FILES(["${config_file}":"${config_in}"])
1199AC_OUTPUT