Andrew's git / gitweb.git / configure.ac
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configure.acon commit compat: fall back on __va_copy if available (26db0f2)
   1#                                               -*- Autoconf -*-
   2# Process this file with autoconf to produce a configure script.
   3
   4AC_PREREQ(2.59)
   5AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])
   6
   7AC_CONFIG_SRCDIR([git.c])
   8
   9config_file=config.mak.autogen
  10config_append=config.mak.append
  11config_in=config.mak.in
  12
  13echo "# ${config_append}.  Generated by configure." > "${config_append}"
  14
  15
  16## Definitions of macros
  17# GIT_CONF_APPEND_LINE(LINE)
  18# --------------------------
  19# Append LINE to file ${config_append}
  20AC_DEFUN([GIT_CONF_APPEND_LINE],
  21[echo "$1" >> "${config_append}"])# GIT_CONF_APPEND_LINE
  22#
  23# GIT_ARG_SET_PATH(PROGRAM)
  24# -------------------------
  25# Provide --with-PROGRAM=PATH option to set PATH to PROGRAM
  26# Optional second argument allows setting NO_PROGRAM=YesPlease if
  27# --without-PROGRAM version used.
  28AC_DEFUN([GIT_ARG_SET_PATH],
  29[AC_ARG_WITH([$1],
  30 [AS_HELP_STRING([--with-$1=PATH],
  31                 [provide PATH to $1])],
  32 [GIT_CONF_APPEND_PATH($1,$2)],[])
  33])# GIT_ARG_SET_PATH
  34#
  35# GIT_CONF_APPEND_PATH(PROGRAM)
  36# ------------------------------
  37# Parse --with-PROGRAM=PATH option to set PROGRAM_PATH=PATH
  38# Used by GIT_ARG_SET_PATH(PROGRAM)
  39# Optional second argument allows setting NO_PROGRAM=YesPlease if
  40# --without-PROGRAM is used.
  41AC_DEFUN([GIT_CONF_APPEND_PATH],
  42[PROGRAM=m4_toupper($1); \
  43if test "$withval" = "no"; then \
  44        if test -n "$2"; then \
  45                m4_toupper($1)_PATH=$withval; \
  46                AC_MSG_NOTICE([Disabling use of ${PROGRAM}]); \
  47                GIT_CONF_APPEND_LINE(NO_${PROGRAM}=YesPlease); \
  48                GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=); \
  49        else \
  50                AC_MSG_ERROR([You cannot use git without $1]); \
  51        fi; \
  52else \
  53        if test "$withval" = "yes"; then \
  54                AC_MSG_WARN([You should provide path for --with-$1=PATH]); \
  55        else \
  56                m4_toupper($1)_PATH=$withval; \
  57                AC_MSG_NOTICE([Setting m4_toupper($1)_PATH to $withval]); \
  58                GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=$withval); \
  59        fi; \
  60fi; \
  61]) # GIT_CONF_APPEND_PATH
  62#
  63# GIT_PARSE_WITH(PACKAGE)
  64# -----------------------
  65# For use in AC_ARG_WITH action-if-found, for packages default ON.
  66# * Set NO_PACKAGE=YesPlease for --without-PACKAGE
  67# * Set PACKAGEDIR=PATH for --with-PACKAGE=PATH
  68# * Unset NO_PACKAGE for --with-PACKAGE without ARG
  69AC_DEFUN([GIT_PARSE_WITH],
  70[PACKAGE=m4_toupper($1); \
  71if test "$withval" = "no"; then \
  72        m4_toupper(NO_$1)=YesPlease; \
  73elif test "$withval" = "yes"; then \
  74        m4_toupper(NO_$1)=; \
  75else \
  76        m4_toupper(NO_$1)=; \
  77        m4_toupper($1)DIR=$withval; \
  78        AC_MSG_NOTICE([Setting m4_toupper($1)DIR to $withval]); \
  79        GIT_CONF_APPEND_LINE(${PACKAGE}DIR=$withval); \
  80fi \
  81])# GIT_PARSE_WITH
  82#
  83# GIT_PARSE_WITH_SET_MAKE_VAR(WITHNAME, VAR, HELP_TEXT)
  84# ---------------------
  85# Set VAR to the value specied by --with-WITHNAME.
  86# No verification of arguments is performed, but warnings are issued
  87# if either 'yes' or 'no' is specified.
  88# HELP_TEXT is presented when --help is called.
  89# This is a direct way to allow setting variables in the Makefile.
  90AC_DEFUN([GIT_PARSE_WITH_SET_MAKE_VAR],
  91[AC_ARG_WITH([$1],
  92 [AS_HELP_STRING([--with-$1=VALUE], $3)],
  93 if test -n "$withval"; then \
  94  if test "$withval" = "yes" -o "$withval" = "no"; then \
  95    AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
  96                     [a value for $1 ($2).  Maybe you do...?]); \
  97  fi; \
  98  \
  99  AC_MSG_NOTICE([Setting $2 to $withval]); \
 100  GIT_CONF_APPEND_LINE($2=$withval); \
 101 fi)])# GIT_PARSE_WITH_SET_MAKE_VAR
 102
 103dnl
 104dnl GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
 105dnl -----------------------------------------
 106dnl Similar to AC_CHECK_FUNC, but on systems that do not generate
 107dnl warnings for missing prototypes (e.g. FreeBSD when compiling without
 108dnl -Wall), it does not work.  By looking for function definition in
 109dnl libraries, this problem can be worked around.
 110AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
 111  AC_SEARCH_LIBS([$1],,
 112  [$2],[$3])
 113],[$3])])
 114
 115dnl
 116dnl GIT_STASH_FLAGS(BASEPATH_VAR)
 117dnl -----------------------------
 118dnl Allow for easy stashing of LDFLAGS and CPPFLAGS before running
 119dnl tests that may want to take user settings into account.
 120AC_DEFUN([GIT_STASH_FLAGS],[
 121if test -n "$1"; then
 122   old_CPPFLAGS="$CPPFLAGS"
 123   old_LDFLAGS="$LDFLAGS"
 124   CPPFLAGS="-I$1/include $CPPFLAGS"
 125   LDFLAGS="-L$1/$lib $LDFLAGS"
 126fi
 127])
 128
 129dnl
 130dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
 131dnl -----------------------------
 132dnl Restore the stashed *FLAGS values.
 133AC_DEFUN([GIT_UNSTASH_FLAGS],[
 134if test -n "$1"; then
 135   CPPFLAGS="$old_CPPFLAGS"
 136   LDFLAGS="$old_LDFLAGS"
 137fi
 138])
 139
 140## Site configuration related to programs (before tests)
 141## --with-PACKAGE[=ARG] and --without-PACKAGE
 142#
 143# Set lib to alternative name of lib directory (e.g. lib64)
 144AC_ARG_WITH([lib],
 145 [AS_HELP_STRING([--with-lib=ARG],
 146                 [ARG specifies alternative name for lib directory])],
 147 [if test "$withval" = "no" || test "$withval" = "yes"; then \
 148        AC_MSG_WARN([You should provide name for --with-lib=ARG]); \
 149else \
 150        lib=$withval; \
 151        AC_MSG_NOTICE([Setting lib to '$lib']); \
 152        GIT_CONF_APPEND_LINE(lib=$withval); \
 153fi; \
 154],[])
 155
 156if test -z "$lib"; then
 157   AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
 158   lib=lib
 159fi
 160
 161AC_ARG_ENABLE([pthreads],
 162 [AS_HELP_STRING([--enable-pthreads=FLAGS],
 163  [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
 164  [The default if FLAGS is not specified is to try first -pthread]
 165  [and then -lpthread.]
 166  [--without-pthreads will disable threading.])],
 167[
 168if test "x$enableval" = "xyes"; then
 169   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
 170elif test "x$enableval" != "xno"; then
 171   PTHREAD_CFLAGS=$enableval
 172   AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
 173else
 174   AC_MSG_NOTICE([POSIX Threads will be disabled.])
 175   NO_PTHREADS=YesPlease
 176   USER_NOPTHREAD=1
 177fi],
 178[
 179   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads.])
 180])
 181
 182# Define option to enable JavaScript minification
 183AC_ARG_ENABLE([jsmin],
 184[AS_HELP_STRING([--enable-jsmin=PATH],
 185  [PATH is the name of a JavaScript minifier or the absolute path to one.])],
 186[
 187  JSMIN=$enableval;
 188  AC_MSG_NOTICE([Setting JSMIN to '$JSMIN' to enable JavaScript minifying])
 189  GIT_CONF_APPEND_LINE(JSMIN=$enableval);
 190])
 191
 192# Define option to enable CSS minification
 193AC_ARG_ENABLE([cssmin],
 194[AS_HELP_STRING([--enable-cssmin=PATH],
 195  [PATH is the name of a CSS minifier or the absolute path to one.])],
 196[
 197  CSSMIN=$enableval;
 198  AC_MSG_NOTICE([Setting CSSMIN to '$CSSMIN' to enable CSS minifying])
 199  GIT_CONF_APPEND_LINE(CSSMIN=$enableval);
 200])
 201
 202## Site configuration (override autodetection)
 203## --with-PACKAGE[=ARG] and --without-PACKAGE
 204AC_MSG_NOTICE([CHECKS for site configuration])
 205#
 206# Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
 207# tests.  These tests take up a significant amount of the total test time
 208# but are not needed unless you plan to talk to SVN repos.
 209#
 210# Define PPC_SHA1 environment variable when running make to make use of
 211# a bundled SHA1 routine optimized for PowerPC.
 212#
 213# Define NO_OPENSSL environment variable if you do not have OpenSSL.
 214# This also implies BLK_SHA1.
 215#
 216# Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
 217# /foo/bar/include and /foo/bar/lib directories.
 218AC_ARG_WITH(openssl,
 219AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
 220AS_HELP_STRING([],              [ARG can be prefix for openssl library and headers]),\
 221GIT_PARSE_WITH(openssl))
 222#
 223# Define NO_CURL if you do not have curl installed.  git-http-pull and
 224# git-http-push are not built, and you cannot use http:// and https://
 225# transports.
 226#
 227# Define CURLDIR=/foo/bar if your curl header and library files are in
 228# /foo/bar/include and /foo/bar/lib directories.
 229AC_ARG_WITH(curl,
 230AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
 231AS_HELP_STRING([],           [ARG can be also prefix for curl library and headers]),
 232GIT_PARSE_WITH(curl))
 233#
 234# Define NO_EXPAT if you do not have expat installed.  git-http-push is
 235# not built, and you cannot push using http:// and https:// transports.
 236#
 237# Define EXPATDIR=/foo/bar if your expat header and library files are in
 238# /foo/bar/include and /foo/bar/lib directories.
 239AC_ARG_WITH(expat,
 240AS_HELP_STRING([--with-expat],
 241[support git-push using http:// and https:// transports via WebDAV (default is YES)])
 242AS_HELP_STRING([],            [ARG can be also prefix for expat library and headers]),
 243GIT_PARSE_WITH(expat))
 244#
 245# Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
 246# installed in /sw, but don't want GIT to link against any libraries
 247# installed there.  If defined you may specify your own (or Fink's)
 248# include directories and library directories by defining CFLAGS
 249# and LDFLAGS appropriately.
 250#
 251# Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
 252# have DarwinPorts installed in /opt/local, but don't want GIT to
 253# link against any libraries installed there.  If defined you may
 254# specify your own (or DarwinPort's) include directories and
 255# library directories by defining CFLAGS and LDFLAGS appropriately.
 256#
 257# Define NO_MMAP if you want to avoid mmap.
 258#
 259# Define NO_ICONV if your libc does not properly support iconv.
 260AC_ARG_WITH(iconv,
 261AS_HELP_STRING([--without-iconv],
 262[if your architecture doesn't properly support iconv])
 263AS_HELP_STRING([--with-iconv=PATH],
 264[PATH is prefix for libiconv library and headers])
 265AS_HELP_STRING([],
 266[used only if you need linking with libiconv]),
 267GIT_PARSE_WITH(iconv))
 268
 269## --enable-FEATURE[=ARG] and --disable-FEATURE
 270#
 271# Define USE_NSEC below if you want git to care about sub-second file mtimes
 272# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
 273# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
 274# randomly break unless your underlying filesystem supports those sub-second
 275# times (my ext3 doesn't).
 276#
 277# Define USE_STDEV below if you want git to care about the underlying device
 278# change being considered an inode change from the update-index perspective.
 279
 280#
 281# Allow user to set ETC_GITCONFIG variable
 282GIT_PARSE_WITH_SET_MAKE_VAR(gitconfig, ETC_GITCONFIG,
 283                        Use VALUE instead of /etc/gitconfig as the
 284                        global git configuration file.
 285                        If VALUE is not fully qualified it will be interpreted
 286                        as a path relative to the computed prefix at runtime.)
 287
 288#
 289# Allow user to set ETC_GITATTRIBUTES variable
 290GIT_PARSE_WITH_SET_MAKE_VAR(gitattributes, ETC_GITATTRIBUTES,
 291                        Use VALUE instead of /etc/gitattributes as the
 292                        global git attributes file.
 293                        If VALUE is not fully qualified it will be interpreted
 294                        as a path relative to the computed prefix at runtime.)
 295
 296#
 297# Allow user to set the default pager
 298GIT_PARSE_WITH_SET_MAKE_VAR(pager, DEFAULT_PAGER,
 299                        Use VALUE as the fall-back pager instead of 'less'.
 300                        This is used by things like 'git log' when the user
 301                        does not specify a pager to use through alternate
 302                        methods. eg: /usr/bin/pager)
 303#
 304# Allow user to set the default editor
 305GIT_PARSE_WITH_SET_MAKE_VAR(editor, DEFAULT_EDITOR,
 306                        Use VALUE as the fall-back editor instead of 'vi'.
 307                        This is used by things like 'git commit' when the user
 308                        does not specify a preferred editor through other
 309                        methods. eg: /usr/bin/editor)
 310
 311#
 312# Define SHELL_PATH to provide path to shell.
 313GIT_ARG_SET_PATH(shell)
 314#
 315# Define PERL_PATH to provide path to Perl.
 316GIT_ARG_SET_PATH(perl)
 317#
 318# Define PYTHON_PATH to provide path to Python.
 319GIT_ARG_SET_PATH(python, allow-without)
 320#
 321# Define ZLIB_PATH to provide path to zlib.
 322GIT_ARG_SET_PATH(zlib)
 323#
 324# Declare the with-tcltk/without-tcltk options.
 325AC_ARG_WITH(tcltk,
 326AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
 327AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
 328AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
 329AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),\
 330GIT_PARSE_WITH(tcltk))
 331#
 332
 333
 334## Checks for programs.
 335AC_MSG_NOTICE([CHECKS for programs])
 336#
 337AC_PROG_CC([cc gcc])
 338AC_C_INLINE
 339case $ac_cv_c_inline in
 340  inline | yes | no)    ;;
 341  *)                    AC_SUBST([INLINE], [$ac_cv_c_inline]) ;;
 342esac
 343
 344# which switch to pass runtime path to dynamic libraries to the linker
 345AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
 346   SAVE_LDFLAGS="${LDFLAGS}"
 347   LDFLAGS="${SAVE_LDFLAGS} -R /"
 348   AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
 349   LDFLAGS="${SAVE_LDFLAGS}"
 350])
 351if test "$git_cv_ld_dashr" = "yes"; then
 352   AC_SUBST(CC_LD_DYNPATH, [-R])
 353else
 354   AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
 355      SAVE_LDFLAGS="${LDFLAGS}"
 356      LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
 357      AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
 358      LDFLAGS="${SAVE_LDFLAGS}"
 359   ])
 360   if test "$git_cv_ld_wl_rpath" = "yes"; then
 361      AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
 362   else
 363      AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
 364         SAVE_LDFLAGS="${LDFLAGS}"
 365         LDFLAGS="${SAVE_LDFLAGS} -rpath /"
 366         AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
 367         LDFLAGS="${SAVE_LDFLAGS}"
 368      ])
 369      if test "$git_cv_ld_rpath" = "yes"; then
 370         AC_SUBST(CC_LD_DYNPATH, [-rpath])
 371      else
 372         AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
 373      fi
 374   fi
 375fi
 376#AC_PROG_INSTALL                # needs install-sh or install.sh in sources
 377AC_CHECK_TOOLS(AR, [gar ar], :)
 378AC_CHECK_PROGS(TAR, [gtar tar])
 379AC_CHECK_PROGS(DIFF, [gnudiff gdiff diff])
 380# TCLTK_PATH will be set to some value if we want Tcl/Tk
 381# or will be empty otherwise.
 382if test -z "$NO_TCLTK"; then
 383  if test "$with_tcltk" = ""; then
 384  # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
 385    TCLTK_PATH=wish
 386    AC_SUBST(TCLTK_PATH)
 387  elif test "$with_tcltk" = "yes"; then
 388  # Tcl/Tk check requested.
 389    AC_CHECK_PROGS(TCLTK_PATH, [wish], )
 390  else
 391    AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
 392    TCLTK_PATH="$with_tcltk"
 393    AC_SUBST(TCLTK_PATH)
 394  fi
 395fi
 396AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
 397if test -n "$ASCIIDOC"; then
 398        AC_MSG_CHECKING([for asciidoc version])
 399        asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
 400        case "${asciidoc_version}" in
 401        asciidoc' '7*)
 402                ASCIIDOC7=YesPlease
 403                AC_MSG_RESULT([${asciidoc_version} > 7])
 404                ;;
 405        asciidoc' '8*)
 406                ASCIIDOC7=
 407                AC_MSG_RESULT([${asciidoc_version}])
 408                ;;
 409        *)
 410                ASCIIDOC7=
 411                AC_MSG_RESULT([${asciidoc_version} (unknown)])
 412                ;;
 413        esac
 414fi
 415AC_SUBST(ASCIIDOC7)
 416
 417
 418## Checks for libraries.
 419AC_MSG_NOTICE([CHECKS for libraries])
 420#
 421# Define NO_OPENSSL environment variable if you do not have OpenSSL.
 422# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
 423
 424GIT_STASH_FLAGS($OPENSSLDIR)
 425
 426AC_CHECK_LIB([crypto], [SHA1_Init],
 427[NEEDS_SSL_WITH_CRYPTO=],
 428[AC_CHECK_LIB([ssl], [SHA1_Init],
 429 [NEEDS_SSL_WITH_CRYPTO=YesPlease],
 430 [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
 431
 432GIT_UNSTASH_FLAGS($OPENSSLDIR)
 433
 434AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
 435AC_SUBST(NO_OPENSSL)
 436
 437#
 438# Define NO_CURL if you do not have libcurl installed.  git-http-pull and
 439# git-http-push are not built, and you cannot use http:// and https://
 440# transports.
 441
 442GIT_STASH_FLAGS($CURLDIR)
 443
 444AC_CHECK_LIB([curl], [curl_global_init],
 445[NO_CURL=],
 446[NO_CURL=YesPlease])
 447
 448GIT_UNSTASH_FLAGS($CURLDIR)
 449
 450AC_SUBST(NO_CURL)
 451
 452#
 453# Define NO_EXPAT if you do not have expat installed.  git-http-push is
 454# not built, and you cannot push using http:// and https:// transports.
 455
 456GIT_STASH_FLAGS($EXPATDIR)
 457
 458AC_CHECK_LIB([expat], [XML_ParserCreate],
 459[NO_EXPAT=],
 460[NO_EXPAT=YesPlease])
 461
 462GIT_UNSTASH_FLAGS($EXPATDIR)
 463
 464AC_SUBST(NO_EXPAT)
 465
 466#
 467# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
 468# some Solaris installations).
 469# Define NO_ICONV if neither libc nor libiconv support iconv.
 470
 471if test -z "$NO_ICONV"; then
 472
 473GIT_STASH_FLAGS($ICONVDIR)
 474
 475AC_DEFUN([ICONVTEST_SRC],
 476[AC_LANG_PROGRAM([#include <iconv.h>],
 477 [iconv_open("", "");])])
 478
 479if test -n "$ICONVDIR"; then
 480   lib_order="-liconv -lc"
 481else
 482   lib_order="-lc -liconv"
 483fi
 484
 485NO_ICONV=YesPlease
 486
 487for l in $lib_order; do
 488    if test "$l" = "-liconv"; then
 489       NEEDS_LIBICONV=YesPlease
 490    else
 491       NEEDS_LIBICONV=
 492    fi
 493
 494    old_LIBS="$LIBS"
 495    LIBS="$LIBS $l"
 496    AC_MSG_CHECKING([for iconv in $l])
 497    AC_LINK_IFELSE([ICONVTEST_SRC],
 498        [AC_MSG_RESULT([yes])
 499        NO_ICONV=
 500        break],
 501        [AC_MSG_RESULT([no])])
 502    LIBS="$old_LIBS"
 503done
 504
 505#in case of break
 506LIBS="$old_LIBS"
 507
 508GIT_UNSTASH_FLAGS($ICONVDIR)
 509
 510AC_SUBST(NEEDS_LIBICONV)
 511AC_SUBST(NO_ICONV)
 512
 513if test -n "$NO_ICONV"; then
 514    NEEDS_LIBICONV=
 515fi
 516
 517fi
 518
 519#
 520# Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
 521
 522GIT_STASH_FLAGS($ZLIB_PATH)
 523
 524AC_DEFUN([ZLIBTEST_SRC], [
 525AC_LANG_PROGRAM([#include <zlib.h>],
 526 [deflateBound(0, 0);])])
 527AC_MSG_CHECKING([for deflateBound in -lz])
 528old_LIBS="$LIBS"
 529LIBS="$LIBS -lz"
 530AC_LINK_IFELSE([ZLIBTEST_SRC],
 531        [AC_MSG_RESULT([yes])],
 532        [AC_MSG_RESULT([no])
 533        NO_DEFLATE_BOUND=yes])
 534LIBS="$old_LIBS"
 535
 536GIT_UNSTASH_FLAGS($ZLIB_PATH)
 537
 538AC_SUBST(NO_DEFLATE_BOUND)
 539
 540#
 541# Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
 542# Patrick Mauritz).
 543AC_CHECK_LIB([c], [socket],
 544[NEEDS_SOCKET=],
 545[NEEDS_SOCKET=YesPlease])
 546AC_SUBST(NEEDS_SOCKET)
 547test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
 548
 549#
 550# The next few tests will define NEEDS_RESOLV if linking with
 551# libresolv provides some of the functions we would normally get
 552# from libc.
 553NEEDS_RESOLV=
 554AC_SUBST(NEEDS_RESOLV)
 555#
 556# Define NO_INET_NTOP if linking with -lresolv is not enough.
 557# Solaris 2.7 in particular hos inet_ntop in -lresolv.
 558NO_INET_NTOP=
 559AC_SUBST(NO_INET_NTOP)
 560AC_CHECK_FUNC([inet_ntop],
 561        [],
 562    [AC_CHECK_LIB([resolv], [inet_ntop],
 563            [NEEDS_RESOLV=YesPlease],
 564        [NO_INET_NTOP=YesPlease])
 565])
 566#
 567# Define NO_INET_PTON if linking with -lresolv is not enough.
 568# Solaris 2.7 in particular hos inet_pton in -lresolv.
 569NO_INET_PTON=
 570AC_SUBST(NO_INET_PTON)
 571AC_CHECK_FUNC([inet_pton],
 572        [],
 573    [AC_CHECK_LIB([resolv], [inet_pton],
 574            [NEEDS_RESOLV=YesPlease],
 575        [NO_INET_PTON=YesPlease])
 576])
 577#
 578# Define NO_HSTRERROR if linking with -lresolv is not enough.
 579# Solaris 2.6 in particular has no hstrerror, even in -lresolv.
 580NO_HSTRERROR=
 581AC_CHECK_FUNC([hstrerror],
 582        [],
 583    [AC_CHECK_LIB([resolv], [hstrerror],
 584            [NEEDS_RESOLV=YesPlease],
 585        [NO_HSTRERROR=YesPlease])
 586])
 587AC_SUBST(NO_HSTRERROR)
 588#
 589# If any of the above tests determined that -lresolv is needed at
 590# build-time, also set it here for remaining configure-time checks.
 591test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
 592
 593AC_CHECK_LIB([c], [basename],
 594[NEEDS_LIBGEN=],
 595[NEEDS_LIBGEN=YesPlease])
 596AC_SUBST(NEEDS_LIBGEN)
 597test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
 598
 599## Checks for header files.
 600AC_MSG_NOTICE([CHECKS for header files])
 601#
 602# Define NO_SYS_SELECT_H if you don't have sys/select.h.
 603AC_CHECK_HEADER([sys/select.h],
 604[NO_SYS_SELECT_H=],
 605[NO_SYS_SELECT_H=UnfortunatelyYes])
 606AC_SUBST(NO_SYS_SELECT_H)
 607#
 608# Define NO_SYS_POLL_H if you don't have sys/poll.h
 609AC_CHECK_HEADER([sys/poll.h],
 610[NO_SYS_POLL_H=],
 611[NO_SYS_POLL_H=UnfortunatelyYes])
 612AC_SUBST(NO_SYS_POLL_H)
 613#
 614# Define NO_INTTYPES_H if you don't have inttypes.h
 615AC_CHECK_HEADER([inttypes.h],
 616[NO_INTTYPES_H=],
 617[NO_INTTYPES_H=UnfortunatelyYes])
 618AC_SUBST(NO_INTTYPES_H)
 619#
 620# Define OLD_ICONV if your library has an old iconv(), where the second
 621# (input buffer pointer) parameter is declared with type (const char **).
 622AC_DEFUN([OLDICONVTEST_SRC], [
 623AC_LANG_PROGRAM([[
 624#include <iconv.h>
 625
 626extern size_t iconv(iconv_t cd,
 627                    char **inbuf, size_t *inbytesleft,
 628                    char **outbuf, size_t *outbytesleft);
 629]], [])])
 630
 631GIT_STASH_FLAGS($ICONVDIR)
 632
 633AC_MSG_CHECKING([for old iconv()])
 634AC_COMPILE_IFELSE([OLDICONVTEST_SRC],
 635        [AC_MSG_RESULT([no])],
 636        [AC_MSG_RESULT([yes])
 637        OLD_ICONV=UnfortunatelyYes])
 638
 639GIT_UNSTASH_FLAGS($ICONVDIR)
 640
 641AC_SUBST(OLD_ICONV)
 642
 643## Checks for typedefs, structures, and compiler characteristics.
 644AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
 645#
 646TYPE_SOCKLEN_T
 647case $ac_cv_type_socklen_t in
 648  yes)  ;;
 649  *)    AC_SUBST([SOCKLEN_T], [$git_cv_socklen_t_equiv]) ;;
 650esac
 651
 652# Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
 653AC_CHECK_MEMBER(struct dirent.d_ino,
 654[NO_D_INO_IN_DIRENT=],
 655[NO_D_INO_IN_DIRENT=YesPlease],
 656[#include <dirent.h>])
 657AC_SUBST(NO_D_INO_IN_DIRENT)
 658#
 659# Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
 660# d_type in struct dirent (latest Cygwin -- will be fixed soonish).
 661AC_CHECK_MEMBER(struct dirent.d_type,
 662[NO_D_TYPE_IN_DIRENT=],
 663[NO_D_TYPE_IN_DIRENT=YesPlease],
 664[#include <dirent.h>])
 665AC_SUBST(NO_D_TYPE_IN_DIRENT)
 666#
 667# Define NO_SOCKADDR_STORAGE if your platform does not have struct
 668# sockaddr_storage.
 669AC_CHECK_TYPE(struct sockaddr_storage,
 670[NO_SOCKADDR_STORAGE=],
 671[NO_SOCKADDR_STORAGE=YesPlease],[
 672#include <sys/types.h>
 673#include <sys/socket.h>
 674])
 675AC_SUBST(NO_SOCKADDR_STORAGE)
 676#
 677# Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
 678AC_CHECK_TYPE([struct addrinfo],[
 679 GIT_CHECK_FUNC([getaddrinfo],
 680  [NO_IPV6=],
 681  [NO_IPV6=YesPlease])
 682],[NO_IPV6=YesPlease],[
 683#include <sys/types.h>
 684#include <sys/socket.h>
 685#include <netdb.h>
 686])
 687AC_SUBST(NO_IPV6)
 688#
 689# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
 690# do not support the 'size specifiers' introduced by C99, namely ll, hh,
 691# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
 692# some C compilers supported these specifiers prior to C99 as an extension.
 693AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers],
 694 [ac_cv_c_c99_format],
 695[# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
 696AC_RUN_IFELSE(
 697        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
 698                [[char buf[64];
 699                if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
 700                  return 1;
 701                else if (strcmp(buf, "12345"))
 702                  return 2;]])],
 703        [ac_cv_c_c99_format=yes],
 704        [ac_cv_c_c99_format=no])
 705])
 706if test $ac_cv_c_c99_format = no; then
 707        NO_C99_FORMAT=YesPlease
 708else
 709        NO_C99_FORMAT=
 710fi
 711AC_SUBST(NO_C99_FORMAT)
 712#
 713# Define NO_REGEX if you have no or inferior regex support in your C library.
 714AC_CACHE_CHECK([whether the platform regex can handle null bytes],
 715 [ac_cv_c_excellent_regex], [
 716AC_EGREP_CPP(yippeeyeswehaveit,
 717        AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
 718#include <regex.h>
 719],
 720[#ifdef REG_STARTEND
 721yippeeyeswehaveit
 722#endif
 723]),
 724        [ac_cv_c_excellent_regex=yes],
 725        [ac_cv_c_excellent_regex=no])
 726])
 727if test $ac_cv_c_excellent_regex = yes; then
 728        NO_REGEX=
 729else
 730        NO_REGEX=YesPlease
 731fi
 732AC_SUBST(NO_REGEX)
 733#
 734# Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
 735# when attempting to read from an fopen'ed directory.
 736AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
 737 [ac_cv_fread_reads_directories],
 738[
 739AC_RUN_IFELSE(
 740        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
 741                [[char c;
 742                FILE *f = fopen(".", "r");
 743                return f && fread(&c, 1, 1, f)]])],
 744        [ac_cv_fread_reads_directories=no],
 745        [ac_cv_fread_reads_directories=yes])
 746])
 747if test $ac_cv_fread_reads_directories = yes; then
 748        FREAD_READS_DIRECTORIES=UnfortunatelyYes
 749else
 750        FREAD_READS_DIRECTORIES=
 751fi
 752AC_SUBST(FREAD_READS_DIRECTORIES)
 753#
 754# Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
 755# or vsnprintf() return -1 instead of number of characters which would
 756# have been written to the final string if enough space had been available.
 757AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
 758 [ac_cv_snprintf_returns_bogus],
 759[
 760AC_RUN_IFELSE(
 761        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
 762                #include "stdarg.h"
 763
 764                int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
 765                {
 766                  int ret;
 767                  va_list ap;
 768                  va_start(ap, format);
 769                  ret = vsnprintf(str, maxsize, format, ap);
 770                  va_end(ap);
 771                  return ret;
 772                }],
 773                [[char buf[6];
 774                  if (test_vsnprintf(buf, 3, "%s", "12345") != 5
 775                      || strcmp(buf, "12")) return 1;
 776                  if (snprintf(buf, 3, "%s", "12345") != 5
 777                      || strcmp(buf, "12")) return 1]])],
 778        [ac_cv_snprintf_returns_bogus=no],
 779        [ac_cv_snprintf_returns_bogus=yes])
 780])
 781if test $ac_cv_snprintf_returns_bogus = yes; then
 782        SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
 783else
 784        SNPRINTF_RETURNS_BOGUS=
 785fi
 786AC_SUBST(SNPRINTF_RETURNS_BOGUS)
 787
 788
 789## Checks for library functions.
 790## (in default C library and libraries checked by AC_CHECK_LIB)
 791AC_MSG_NOTICE([CHECKS for library functions])
 792#
 793# Define NO_LIBGEN_H if you don't have libgen.h.
 794AC_CHECK_HEADER([libgen.h],
 795[NO_LIBGEN_H=],
 796[NO_LIBGEN_H=YesPlease])
 797AC_SUBST(NO_LIBGEN_H)
 798#
 799# Define HAVE_PATHS_H if you have paths.h.
 800AC_CHECK_HEADER([paths.h],
 801[HAVE_PATHS_H=YesPlease],
 802[HAVE_PATHS_H=])
 803AC_SUBST(HAVE_PATHS_H)
 804#
 805# Define NO_STRCASESTR if you don't have strcasestr.
 806GIT_CHECK_FUNC(strcasestr,
 807[NO_STRCASESTR=],
 808[NO_STRCASESTR=YesPlease])
 809AC_SUBST(NO_STRCASESTR)
 810#
 811# Define NO_STRTOK_R if you don't have strtok_r
 812GIT_CHECK_FUNC(strtok_r,
 813[NO_STRTOK_R=],
 814[NO_STRTOK_R=YesPlease])
 815AC_SUBST(NO_STRTOK_R)
 816#
 817# Define NO_FNMATCH if you don't have fnmatch
 818GIT_CHECK_FUNC(fnmatch,
 819[NO_FNMATCH=],
 820[NO_FNMATCH=YesPlease])
 821AC_SUBST(NO_FNMATCH)
 822#
 823# Define NO_FNMATCH_CASEFOLD if your fnmatch function doesn't have the
 824# FNM_CASEFOLD GNU extension.
 825AC_CACHE_CHECK([whether the fnmatch function supports the FNMATCH_CASEFOLD GNU extension],
 826 [ac_cv_c_excellent_fnmatch], [
 827AC_EGREP_CPP(yippeeyeswehaveit,
 828        AC_LANG_PROGRAM([
 829#include <fnmatch.h>
 830],
 831[#ifdef FNM_CASEFOLD
 832yippeeyeswehaveit
 833#endif
 834]),
 835        [ac_cv_c_excellent_fnmatch=yes],
 836        [ac_cv_c_excellent_fnmatch=no])
 837])
 838if test $ac_cv_c_excellent_fnmatch = yes; then
 839        NO_FNMATCH_CASEFOLD=
 840else
 841        NO_FNMATCH_CASEFOLD=YesPlease
 842fi
 843AC_SUBST(NO_FNMATCH_CASEFOLD)
 844#
 845# Define NO_MEMMEM if you don't have memmem.
 846GIT_CHECK_FUNC(memmem,
 847[NO_MEMMEM=],
 848[NO_MEMMEM=YesPlease])
 849AC_SUBST(NO_MEMMEM)
 850#
 851# Define NO_STRLCPY if you don't have strlcpy.
 852GIT_CHECK_FUNC(strlcpy,
 853[NO_STRLCPY=],
 854[NO_STRLCPY=YesPlease])
 855AC_SUBST(NO_STRLCPY)
 856#
 857# Define NO_UINTMAX_T if your platform does not have uintmax_t
 858AC_CHECK_TYPE(uintmax_t,
 859[NO_UINTMAX_T=],
 860[NO_UINTMAX_T=YesPlease],[
 861#include <inttypes.h>
 862])
 863AC_SUBST(NO_UINTMAX_T)
 864#
 865# Define NO_STRTOUMAX if you don't have strtoumax in the C library.
 866GIT_CHECK_FUNC(strtoumax,
 867[NO_STRTOUMAX=],
 868[NO_STRTOUMAX=YesPlease])
 869AC_SUBST(NO_STRTOUMAX)
 870#
 871# Define NO_SETENV if you don't have setenv in the C library.
 872GIT_CHECK_FUNC(setenv,
 873[NO_SETENV=],
 874[NO_SETENV=YesPlease])
 875AC_SUBST(NO_SETENV)
 876#
 877# Define NO_UNSETENV if you don't have unsetenv in the C library.
 878GIT_CHECK_FUNC(unsetenv,
 879[NO_UNSETENV=],
 880[NO_UNSETENV=YesPlease])
 881AC_SUBST(NO_UNSETENV)
 882#
 883# Define NO_MKDTEMP if you don't have mkdtemp in the C library.
 884GIT_CHECK_FUNC(mkdtemp,
 885[NO_MKDTEMP=],
 886[NO_MKDTEMP=YesPlease])
 887AC_SUBST(NO_MKDTEMP)
 888#
 889# Define NO_MKSTEMPS if you don't have mkstemps in the C library.
 890GIT_CHECK_FUNC(mkstemps,
 891[NO_MKSTEMPS=],
 892[NO_MKSTEMPS=YesPlease])
 893AC_SUBST(NO_MKSTEMPS)
 894#
 895# Define NO_INITGROUPS if you don't have initgroups in the C library.
 896GIT_CHECK_FUNC(initgroups,
 897[NO_INITGROUPS=],
 898[NO_INITGROUPS=YesPlease])
 899AC_SUBST(NO_INITGROUPS)
 900#
 901#
 902# Define NO_MMAP if you want to avoid mmap.
 903#
 904# Define NO_ICONV if your libc does not properly support iconv.
 905
 906
 907## Other checks.
 908# Define USE_PIC if you need the main git objects to be built with -fPIC
 909# in order to build and link perl/Git.so.  x86-64 seems to need this.
 910#
 911# Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
 912# Enable it on Windows.  By default, symrefs are still used.
 913#
 914# Define NO_PTHREADS if we do not have pthreads.
 915#
 916# Define PTHREAD_LIBS to the linker flag used for Pthread support.
 917AC_DEFUN([PTHREADTEST_SRC], [
 918AC_LANG_PROGRAM([[
 919#include <pthread.h>
 920]], [[
 921        pthread_mutex_t test_mutex;
 922        int retcode = 0;
 923        retcode |= pthread_mutex_init(&test_mutex,(void *)0);
 924        retcode |= pthread_mutex_lock(&test_mutex);
 925        retcode |= pthread_mutex_unlock(&test_mutex);
 926        return retcode;
 927]])])
 928
 929dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
 930dnl   [[#include <pthread.h>]],
 931dnl   [[pthread_mutex_t test_mutex;]]
 932dnl )])
 933
 934NO_PTHREADS=UnfortunatelyYes
 935PTHREAD_LIBS=
 936
 937if test -n "$USER_NOPTHREAD"; then
 938   AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
 939# handle these separately since PTHREAD_CFLAGS could be '-lpthreads
 940# -D_REENTRANT' or some such.
 941elif test -z "$PTHREAD_CFLAGS"; then
 942  threads_found=no
 943  for opt in -mt -pthread -lpthread; do
 944     old_CFLAGS="$CFLAGS"
 945     CFLAGS="$opt $CFLAGS"
 946     AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
 947     AC_LINK_IFELSE([PTHREADTEST_SRC],
 948        [AC_MSG_RESULT([yes])
 949                NO_PTHREADS=
 950                PTHREAD_LIBS="$opt"
 951                PTHREAD_CFLAGS="$opt"
 952                threads_found=yes
 953                break
 954        ],
 955        [AC_MSG_RESULT([no])])
 956      CFLAGS="$old_CFLAGS"
 957  done
 958  if test $threads_found != yes; then
 959    AC_CHECK_LIB([pthread], [pthread_create],
 960        [PTHREAD_LIBS="-lpthread"],
 961        [NO_PTHREADS=UnfortunatelyYes])
 962  fi
 963else
 964  old_CFLAGS="$CFLAGS"
 965  CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
 966  AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
 967  AC_LINK_IFELSE([PTHREADTEST_SRC],
 968        [AC_MSG_RESULT([yes])
 969                NO_PTHREADS=
 970                PTHREAD_LIBS="$PTHREAD_CFLAGS"
 971        ],
 972        [AC_MSG_RESULT([no])])
 973
 974  CFLAGS="$old_CFLAGS"
 975fi
 976
 977CFLAGS="$old_CFLAGS"
 978
 979AC_SUBST(PTHREAD_CFLAGS)
 980AC_SUBST(PTHREAD_LIBS)
 981AC_SUBST(NO_PTHREADS)
 982
 983## Output files
 984AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
 985AC_OUTPUT
 986
 987
 988## Cleanup
 989rm -f "${config_append}"