Andrew's git / gitweb.git / configure.ac
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configure.acon commit Merge branch 'as/t4012-style-updates' (19f13d2)
   1#                                               -*- Autoconf -*-
   2# Process this file with autoconf to produce a configure script.
   3
   4## Definitions of private macros.
   5
   6# GIT_CONF_APPEND_LINE(LINE)
   7# --------------------------
   8# Append LINE to file ${config_append}
   9AC_DEFUN([GIT_CONF_APPEND_LINE],
  10         [echo "$1" >> "${config_append}"])
  11
  12# GIT_ARG_SET_PATH(PROGRAM)
  13# -------------------------
  14# Provide --with-PROGRAM=PATH option to set PATH to PROGRAM
  15# Optional second argument allows setting NO_PROGRAM=YesPlease if
  16# --without-PROGRAM version used.
  17AC_DEFUN([GIT_ARG_SET_PATH],
  18    [AC_ARG_WITH([$1],
  19        [AS_HELP_STRING([--with-$1=PATH],
  20                        [provide PATH to $1])],
  21        [GIT_CONF_APPEND_PATH([$1], [$2])],
  22        [])])
  23
  24# GIT_CONF_APPEND_PATH(PROGRAM)
  25# -----------------------------
  26# Parse --with-PROGRAM=PATH option to set PROGRAM_PATH=PATH
  27# Used by GIT_ARG_SET_PATH(PROGRAM)
  28# Optional second argument allows setting NO_PROGRAM=YesPlease if
  29# --without-PROGRAM is used.
  30AC_DEFUN([GIT_CONF_APPEND_PATH],
  31    [m4_pushdef([GIT_UC_PROGRAM], m4_toupper([$1]))dnl
  32    PROGRAM=GIT_UC_PROGRAM
  33    if test "$withval" = "no"; then
  34        if test -n "$2"; then
  35                GIT_UC_PROGRAM[]_PATH=$withval
  36                AC_MSG_NOTICE([Disabling use of ${PROGRAM}])
  37                GIT_CONF_APPEND_LINE(NO_${PROGRAM}=YesPlease)
  38                GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=)
  39        else
  40                AC_MSG_ERROR([You cannot use git without $1])
  41        fi
  42    else
  43        if test "$withval" = "yes"; then
  44                AC_MSG_WARN([You should provide path for --with-$1=PATH])
  45        else
  46                GIT_UC_PROGRAM[]_PATH=$withval
  47                AC_MSG_NOTICE([Setting GIT_UC_PROGRAM[]_PATH to $withval])
  48                GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=$withval)
  49        fi
  50    fi
  51    m4_popdef([GIT_UC_PROGRAM])])
  52
  53# GIT_PARSE_WITH(PACKAGE)
  54# -----------------------
  55# For use in AC_ARG_WITH action-if-found, for packages default ON.
  56# * Set NO_PACKAGE=YesPlease for --without-PACKAGE
  57# * Set PACKAGEDIR=PATH for --with-PACKAGE=PATH
  58# * Unset NO_PACKAGE for --with-PACKAGE without ARG
  59AC_DEFUN([GIT_PARSE_WITH],
  60    [m4_pushdef([GIT_UC_PACKAGE], m4_toupper([$1]))dnl
  61    PACKAGE=GIT_UC_PACKAGE
  62    if test "$withval" = "no"; then
  63        NO_[]GIT_UC_PACKAGE=YesPlease
  64    elif test "$withval" = "yes"; then
  65        NO_[]GIT_UC_PACKAGE=
  66    else
  67        NO_[]GIT_UC_PACKAGE=
  68        GIT_UC_PACKAGE[]DIR=$withval
  69        AC_MSG_NOTICE([Setting GIT_UC_PACKAGE[]DIR to $withval])
  70        GIT_CONF_APPEND_LINE(${PACKAGE}DIR=$withval)
  71    fi
  72    m4_popdef([GIT_UC_PACKAGE])])
  73
  74# GIT_PARSE_WITH_SET_MAKE_VAR(WITHNAME, VAR, HELP_TEXT)
  75# -----------------------------------------------------
  76# Set VAR to the value specied by --with-WITHNAME.
  77# No verification of arguments is performed, but warnings are issued
  78# if either 'yes' or 'no' is specified.
  79# HELP_TEXT is presented when --help is called.
  80# This is a direct way to allow setting variables in the Makefile.
  81AC_DEFUN([GIT_PARSE_WITH_SET_MAKE_VAR],
  82[AC_ARG_WITH([$1],
  83 [AS_HELP_STRING([--with-$1=VALUE], $3)],
  84 if test -n "$withval"; then
  85  if test "$withval" = "yes" -o "$withval" = "no"; then
  86    AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
  87                     [a value for $1 ($2).  Maybe you do...?])
  88  fi
  89  AC_MSG_NOTICE([Setting $2 to $withval])
  90  GIT_CONF_APPEND_LINE($2=$withval)
  91 fi)])# GIT_PARSE_WITH_SET_MAKE_VAR
  92
  93#
  94# GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
  95# -----------------------------------------
  96# Similar to AC_CHECK_FUNC, but on systems that do not generate
  97# warnings for missing prototypes (e.g. FreeBSD when compiling without
  98# -Wall), it does not work.  By looking for function definition in
  99# libraries, this problem can be worked around.
 100AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
 101  AC_SEARCH_LIBS([$1],,
 102  [$2],[$3])
 103],[$3])])
 104
 105#
 106# GIT_STASH_FLAGS(BASEPATH_VAR)
 107# -----------------------------
 108# Allow for easy stashing of LDFLAGS and CPPFLAGS before running
 109# tests that may want to take user settings into account.
 110AC_DEFUN([GIT_STASH_FLAGS],[
 111if test -n "$1"; then
 112   old_CPPFLAGS="$CPPFLAGS"
 113   old_LDFLAGS="$LDFLAGS"
 114   CPPFLAGS="-I$1/include $CPPFLAGS"
 115   LDFLAGS="-L$1/$lib $LDFLAGS"
 116fi
 117])
 118
 119dnl
 120dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
 121dnl -----------------------------
 122dnl Restore the stashed *FLAGS values.
 123AC_DEFUN([GIT_UNSTASH_FLAGS],[
 124if test -n "$1"; then
 125   CPPFLAGS="$old_CPPFLAGS"
 126   LDFLAGS="$old_LDFLAGS"
 127fi
 128])
 129
 130## Configure body starts here.
 131
 132AC_PREREQ(2.59)
 133AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])
 134
 135AC_CONFIG_SRCDIR([git.c])
 136
 137config_file=config.mak.autogen
 138config_append=config.mak.append
 139config_in=config.mak.in
 140
 141echo "# ${config_append}.  Generated by configure." > "${config_append}"
 142
 143# Directories holding "saner" versions of common or POSIX binaries.
 144AC_ARG_WITH([sane-tool-path],
 145  [AS_HELP_STRING(
 146    [--with-sane-tool-path=DIR-1[[:DIR-2...:DIR-n]]],
 147    [Directories to prepend to PATH in build system and generated scripts])],
 148  [if test "$withval" = "no"; then
 149    withval=''
 150  else
 151    AC_MSG_NOTICE([Setting SANE_TOOL_PATH to '$withval'])
 152  fi
 153  GIT_CONF_APPEND_LINE([SANE_TOOL_PATH=$withval])],
 154  [# If the "--with-sane-tool-path" option was not given, don't touch
 155   # SANE_TOOL_PATH here, but let defaults in Makefile take care of it.
 156   # This should minimize spurious differences in the behaviour of the
 157   # Git build system when configure is used w.r.t. when it is not.
 158   :])
 159
 160## Site configuration related to programs (before tests)
 161## --with-PACKAGE[=ARG] and --without-PACKAGE
 162#
 163# Set lib to alternative name of lib directory (e.g. lib64)
 164AC_ARG_WITH([lib],
 165 [AS_HELP_STRING([--with-lib=ARG],
 166                 [ARG specifies alternative name for lib directory])],
 167 [if test "$withval" = "no" || test "$withval" = "yes"; then
 168        AC_MSG_WARN([You should provide name for --with-lib=ARG])
 169  else
 170        lib=$withval
 171        AC_MSG_NOTICE([Setting lib to '$lib'])
 172        GIT_CONF_APPEND_LINE(lib=$withval)
 173  fi])
 174
 175if test -z "$lib"; then
 176   AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
 177   lib=lib
 178fi
 179
 180AC_ARG_ENABLE([pthreads],
 181 [AS_HELP_STRING([--enable-pthreads=FLAGS],
 182  [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
 183  [The default if FLAGS is not specified is to try first -pthread]
 184  [and then -lpthread.]
 185  [--without-pthreads will disable threading.])],
 186[
 187if test "x$enableval" = "xyes"; then
 188   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
 189elif test "x$enableval" != "xno"; then
 190   PTHREAD_CFLAGS=$enableval
 191   AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
 192else
 193   AC_MSG_NOTICE([POSIX Threads will be disabled.])
 194   NO_PTHREADS=YesPlease
 195   USER_NOPTHREAD=1
 196fi],
 197[
 198   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads.])
 199])
 200
 201# Define option to enable JavaScript minification
 202AC_ARG_ENABLE([jsmin],
 203[AS_HELP_STRING([--enable-jsmin=PATH],
 204  [PATH is the name of a JavaScript minifier or the absolute path to one.])],
 205[
 206  JSMIN=$enableval;
 207  AC_MSG_NOTICE([Setting JSMIN to '$JSMIN' to enable JavaScript minifying])
 208  GIT_CONF_APPEND_LINE(JSMIN=$enableval);
 209])
 210
 211# Define option to enable CSS minification
 212AC_ARG_ENABLE([cssmin],
 213[AS_HELP_STRING([--enable-cssmin=PATH],
 214  [PATH is the name of a CSS minifier or the absolute path to one.])],
 215[
 216  CSSMIN=$enableval;
 217  AC_MSG_NOTICE([Setting CSSMIN to '$CSSMIN' to enable CSS minifying])
 218  GIT_CONF_APPEND_LINE(CSSMIN=$enableval);
 219])
 220
 221## Site configuration (override autodetection)
 222## --with-PACKAGE[=ARG] and --without-PACKAGE
 223AC_MSG_NOTICE([CHECKS for site configuration])
 224#
 225# Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
 226# tests.  These tests take up a significant amount of the total test time
 227# but are not needed unless you plan to talk to SVN repos.
 228#
 229# Define PPC_SHA1 environment variable when running make to make use of
 230# a bundled SHA1 routine optimized for PowerPC.
 231#
 232# Define NO_OPENSSL environment variable if you do not have OpenSSL.
 233# This also implies BLK_SHA1.
 234#
 235# Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
 236# /foo/bar/include and /foo/bar/lib directories.
 237AC_ARG_WITH(openssl,
 238AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
 239AS_HELP_STRING([],              [ARG can be prefix for openssl library and headers]),
 240GIT_PARSE_WITH([openssl]))
 241
 242# Define USE_LIBPCRE if you have and want to use libpcre. git-grep will be
 243# able to use Perl-compatible regular expressions.
 244#
 245# Define LIBPCREDIR=/foo/bar if your libpcre header and library files are in
 246# /foo/bar/include and /foo/bar/lib directories.
 247#
 248AC_ARG_WITH(libpcre,
 249AS_HELP_STRING([--with-libpcre],[support Perl-compatible regexes (default is NO)])
 250AS_HELP_STRING([],           [ARG can be also prefix for libpcre library and headers]),
 251    if test "$withval" = "no"; then
 252        USE_LIBPCRE=
 253    elif test "$withval" = "yes"; then
 254        USE_LIBPCRE=YesPlease
 255    else
 256        USE_LIBPCRE=YesPlease
 257        LIBPCREDIR=$withval
 258        AC_MSG_NOTICE([Setting LIBPCREDIR to $withval])
 259        GIT_CONF_APPEND_LINE(LIBPCREDIR=$withval)
 260    fi)
 261#
 262# Define NO_CURL if you do not have curl installed.  git-http-pull and
 263# git-http-push are not built, and you cannot use http:// and https://
 264# transports.
 265#
 266# Define CURLDIR=/foo/bar if your curl header and library files are in
 267# /foo/bar/include and /foo/bar/lib directories.
 268AC_ARG_WITH(curl,
 269AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
 270AS_HELP_STRING([],           [ARG can be also prefix for curl library and headers]),
 271GIT_PARSE_WITH(curl))
 272#
 273# Define NO_EXPAT if you do not have expat installed.  git-http-push is
 274# not built, and you cannot push using http:// and https:// transports.
 275#
 276# Define EXPATDIR=/foo/bar if your expat header and library files are in
 277# /foo/bar/include and /foo/bar/lib directories.
 278AC_ARG_WITH(expat,
 279AS_HELP_STRING([--with-expat],
 280[support git-push using http:// and https:// transports via WebDAV (default is YES)])
 281AS_HELP_STRING([],            [ARG can be also prefix for expat library and headers]),
 282GIT_PARSE_WITH(expat))
 283#
 284# Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
 285# installed in /sw, but don't want GIT to link against any libraries
 286# installed there.  If defined you may specify your own (or Fink's)
 287# include directories and library directories by defining CFLAGS
 288# and LDFLAGS appropriately.
 289#
 290# Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
 291# have DarwinPorts installed in /opt/local, but don't want GIT to
 292# link against any libraries installed there.  If defined you may
 293# specify your own (or DarwinPort's) include directories and
 294# library directories by defining CFLAGS and LDFLAGS appropriately.
 295#
 296# Define NO_MMAP if you want to avoid mmap.
 297#
 298# Define NO_ICONV if your libc does not properly support iconv.
 299AC_ARG_WITH(iconv,
 300AS_HELP_STRING([--without-iconv],
 301[if your architecture doesn't properly support iconv])
 302AS_HELP_STRING([--with-iconv=PATH],
 303[PATH is prefix for libiconv library and headers])
 304AS_HELP_STRING([],
 305[used only if you need linking with libiconv]),
 306GIT_PARSE_WITH(iconv))
 307
 308## --enable-FEATURE[=ARG] and --disable-FEATURE
 309#
 310# Define USE_NSEC below if you want git to care about sub-second file mtimes
 311# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
 312# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
 313# randomly break unless your underlying filesystem supports those sub-second
 314# times (my ext3 doesn't).
 315#
 316# Define USE_STDEV below if you want git to care about the underlying device
 317# change being considered an inode change from the update-index perspective.
 318
 319#
 320# Allow user to set ETC_GITCONFIG variable
 321GIT_PARSE_WITH_SET_MAKE_VAR(gitconfig, ETC_GITCONFIG,
 322                        Use VALUE instead of /etc/gitconfig as the
 323                        global git configuration file.
 324                        If VALUE is not fully qualified it will be interpreted
 325                        as a path relative to the computed prefix at runtime.)
 326
 327#
 328# Allow user to set ETC_GITATTRIBUTES variable
 329GIT_PARSE_WITH_SET_MAKE_VAR(gitattributes, ETC_GITATTRIBUTES,
 330                        Use VALUE instead of /etc/gitattributes as the
 331                        global git attributes file.
 332                        If VALUE is not fully qualified it will be interpreted
 333                        as a path relative to the computed prefix at runtime.)
 334
 335#
 336# Allow user to set the default pager
 337GIT_PARSE_WITH_SET_MAKE_VAR(pager, DEFAULT_PAGER,
 338                        Use VALUE as the fall-back pager instead of 'less'.
 339                        This is used by things like 'git log' when the user
 340                        does not specify a pager to use through alternate
 341                        methods. eg: /usr/bin/pager)
 342#
 343# Allow user to set the default editor
 344GIT_PARSE_WITH_SET_MAKE_VAR(editor, DEFAULT_EDITOR,
 345                        Use VALUE as the fall-back editor instead of 'vi'.
 346                        This is used by things like 'git commit' when the user
 347                        does not specify a preferred editor through other
 348                        methods. eg: /usr/bin/editor)
 349
 350#
 351# Define SHELL_PATH to provide path to shell.
 352GIT_ARG_SET_PATH(shell)
 353#
 354# Define PERL_PATH to provide path to Perl.
 355GIT_ARG_SET_PATH(perl)
 356#
 357# Define PYTHON_PATH to provide path to Python.
 358GIT_ARG_SET_PATH(python, allow-without)
 359#
 360# Define ZLIB_PATH to provide path to zlib.
 361GIT_ARG_SET_PATH(zlib)
 362#
 363# Declare the with-tcltk/without-tcltk options.
 364AC_ARG_WITH(tcltk,
 365AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
 366AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
 367AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
 368AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),
 369GIT_PARSE_WITH(tcltk))
 370#
 371
 372
 373## Checks for programs.
 374AC_MSG_NOTICE([CHECKS for programs])
 375#
 376AC_PROG_CC([cc gcc])
 377AC_C_INLINE
 378case $ac_cv_c_inline in
 379  inline | yes | no)    ;;
 380  *)                    AC_SUBST([INLINE], [$ac_cv_c_inline]) ;;
 381esac
 382
 383# which switch to pass runtime path to dynamic libraries to the linker
 384AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
 385   SAVE_LDFLAGS="${LDFLAGS}"
 386   LDFLAGS="${SAVE_LDFLAGS} -R /"
 387   AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
 388   LDFLAGS="${SAVE_LDFLAGS}"
 389])
 390if test "$git_cv_ld_dashr" = "yes"; then
 391   AC_SUBST(CC_LD_DYNPATH, [-R])
 392else
 393   AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
 394      SAVE_LDFLAGS="${LDFLAGS}"
 395      LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
 396      AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
 397      LDFLAGS="${SAVE_LDFLAGS}"
 398   ])
 399   if test "$git_cv_ld_wl_rpath" = "yes"; then
 400      AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
 401   else
 402      AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
 403         SAVE_LDFLAGS="${LDFLAGS}"
 404         LDFLAGS="${SAVE_LDFLAGS} -rpath /"
 405         AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
 406         LDFLAGS="${SAVE_LDFLAGS}"
 407      ])
 408      if test "$git_cv_ld_rpath" = "yes"; then
 409         AC_SUBST(CC_LD_DYNPATH, [-rpath])
 410      else
 411         AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
 412      fi
 413   fi
 414fi
 415#AC_PROG_INSTALL                # needs install-sh or install.sh in sources
 416AC_CHECK_TOOLS(AR, [gar ar], :)
 417AC_CHECK_PROGS(TAR, [gtar tar])
 418AC_CHECK_PROGS(DIFF, [gnudiff gdiff diff])
 419# TCLTK_PATH will be set to some value if we want Tcl/Tk
 420# or will be empty otherwise.
 421if test -z "$NO_TCLTK"; then
 422  if test "$with_tcltk" = ""; then
 423  # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
 424    TCLTK_PATH=wish
 425    AC_SUBST(TCLTK_PATH)
 426  elif test "$with_tcltk" = "yes"; then
 427  # Tcl/Tk check requested.
 428    AC_CHECK_PROGS(TCLTK_PATH, [wish], )
 429  else
 430    AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
 431    TCLTK_PATH="$with_tcltk"
 432    AC_SUBST(TCLTK_PATH)
 433  fi
 434fi
 435AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
 436if test -n "$ASCIIDOC"; then
 437        AC_MSG_CHECKING([for asciidoc version])
 438        asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
 439        case "${asciidoc_version}" in
 440        asciidoc' '8*)
 441                AC_MSG_RESULT([${asciidoc_version}])
 442                ;;
 443        *)
 444                AC_MSG_RESULT([${asciidoc_version} (unknown)])
 445                ;;
 446        esac
 447fi
 448
 449
 450## Checks for libraries.
 451AC_MSG_NOTICE([CHECKS for libraries])
 452#
 453# Define NO_OPENSSL environment variable if you do not have OpenSSL.
 454# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
 455
 456GIT_STASH_FLAGS($OPENSSLDIR)
 457
 458AC_CHECK_LIB([crypto], [SHA1_Init],
 459[NEEDS_SSL_WITH_CRYPTO=],
 460[AC_CHECK_LIB([ssl], [SHA1_Init],
 461 [NEEDS_SSL_WITH_CRYPTO=YesPlease],
 462 [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
 463
 464GIT_UNSTASH_FLAGS($OPENSSLDIR)
 465
 466AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
 467AC_SUBST(NO_OPENSSL)
 468
 469#
 470# Define USE_LIBPCRE if you have and want to use libpcre. git-grep will be
 471# able to use Perl-compatible regular expressions.
 472#
 473
 474if test -n "$USE_LIBPCRE"; then
 475
 476GIT_STASH_FLAGS($LIBPCREDIR)
 477
 478AC_CHECK_LIB([pcre], [pcre_version],
 479[USE_LIBPCRE=YesPlease],
 480[USE_LIBPCRE=])
 481
 482GIT_UNSTASH_FLAGS($LIBPCREDIR)
 483
 484AC_SUBST(USE_LIBPCRE)
 485
 486fi
 487
 488#
 489# Define NO_CURL if you do not have libcurl installed.  git-http-pull and
 490# git-http-push are not built, and you cannot use http:// and https://
 491# transports.
 492
 493GIT_STASH_FLAGS($CURLDIR)
 494
 495AC_CHECK_LIB([curl], [curl_global_init],
 496[NO_CURL=],
 497[NO_CURL=YesPlease])
 498
 499GIT_UNSTASH_FLAGS($CURLDIR)
 500
 501AC_SUBST(NO_CURL)
 502
 503#
 504# Define NO_EXPAT if you do not have expat installed.  git-http-push is
 505# not built, and you cannot push using http:// and https:// transports.
 506
 507GIT_STASH_FLAGS($EXPATDIR)
 508
 509AC_CHECK_LIB([expat], [XML_ParserCreate],
 510[NO_EXPAT=],
 511[NO_EXPAT=YesPlease])
 512
 513GIT_UNSTASH_FLAGS($EXPATDIR)
 514
 515AC_SUBST(NO_EXPAT)
 516
 517#
 518# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
 519# some Solaris installations).
 520# Define NO_ICONV if neither libc nor libiconv support iconv.
 521
 522if test -z "$NO_ICONV"; then
 523
 524GIT_STASH_FLAGS($ICONVDIR)
 525
 526AC_DEFUN([ICONVTEST_SRC],
 527[AC_LANG_PROGRAM([#include <iconv.h>],
 528 [iconv_open("", "");])])
 529
 530if test -n "$ICONVDIR"; then
 531   lib_order="-liconv -lc"
 532else
 533   lib_order="-lc -liconv"
 534fi
 535
 536NO_ICONV=YesPlease
 537
 538for l in $lib_order; do
 539    if test "$l" = "-liconv"; then
 540       NEEDS_LIBICONV=YesPlease
 541    else
 542       NEEDS_LIBICONV=
 543    fi
 544
 545    old_LIBS="$LIBS"
 546    LIBS="$LIBS $l"
 547    AC_MSG_CHECKING([for iconv in $l])
 548    AC_LINK_IFELSE([ICONVTEST_SRC],
 549        [AC_MSG_RESULT([yes])
 550        NO_ICONV=
 551        break],
 552        [AC_MSG_RESULT([no])])
 553    LIBS="$old_LIBS"
 554done
 555
 556#in case of break
 557LIBS="$old_LIBS"
 558
 559GIT_UNSTASH_FLAGS($ICONVDIR)
 560
 561AC_SUBST(NEEDS_LIBICONV)
 562AC_SUBST(NO_ICONV)
 563
 564if test -n "$NO_ICONV"; then
 565    NEEDS_LIBICONV=
 566fi
 567
 568fi
 569
 570#
 571# Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
 572
 573GIT_STASH_FLAGS($ZLIB_PATH)
 574
 575AC_DEFUN([ZLIBTEST_SRC], [
 576AC_LANG_PROGRAM([#include <zlib.h>],
 577 [deflateBound(0, 0);])])
 578AC_MSG_CHECKING([for deflateBound in -lz])
 579old_LIBS="$LIBS"
 580LIBS="$LIBS -lz"
 581AC_LINK_IFELSE([ZLIBTEST_SRC],
 582        [AC_MSG_RESULT([yes])],
 583        [AC_MSG_RESULT([no])
 584        NO_DEFLATE_BOUND=yes])
 585LIBS="$old_LIBS"
 586
 587GIT_UNSTASH_FLAGS($ZLIB_PATH)
 588
 589AC_SUBST(NO_DEFLATE_BOUND)
 590
 591#
 592# Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
 593# Patrick Mauritz).
 594AC_CHECK_LIB([c], [socket],
 595[NEEDS_SOCKET=],
 596[NEEDS_SOCKET=YesPlease])
 597AC_SUBST(NEEDS_SOCKET)
 598test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
 599
 600#
 601# The next few tests will define NEEDS_RESOLV if linking with
 602# libresolv provides some of the functions we would normally get
 603# from libc.
 604NEEDS_RESOLV=
 605AC_SUBST(NEEDS_RESOLV)
 606#
 607# Define NO_INET_NTOP if linking with -lresolv is not enough.
 608# Solaris 2.7 in particular hos inet_ntop in -lresolv.
 609NO_INET_NTOP=
 610AC_SUBST(NO_INET_NTOP)
 611AC_CHECK_FUNC([inet_ntop],
 612        [],
 613    [AC_CHECK_LIB([resolv], [inet_ntop],
 614            [NEEDS_RESOLV=YesPlease],
 615        [NO_INET_NTOP=YesPlease])
 616])
 617#
 618# Define NO_INET_PTON if linking with -lresolv is not enough.
 619# Solaris 2.7 in particular hos inet_pton in -lresolv.
 620NO_INET_PTON=
 621AC_SUBST(NO_INET_PTON)
 622AC_CHECK_FUNC([inet_pton],
 623        [],
 624    [AC_CHECK_LIB([resolv], [inet_pton],
 625            [NEEDS_RESOLV=YesPlease],
 626        [NO_INET_PTON=YesPlease])
 627])
 628#
 629# Define NO_HSTRERROR if linking with -lresolv is not enough.
 630# Solaris 2.6 in particular has no hstrerror, even in -lresolv.
 631NO_HSTRERROR=
 632AC_CHECK_FUNC([hstrerror],
 633        [],
 634    [AC_CHECK_LIB([resolv], [hstrerror],
 635            [NEEDS_RESOLV=YesPlease],
 636        [NO_HSTRERROR=YesPlease])
 637])
 638AC_SUBST(NO_HSTRERROR)
 639#
 640# If any of the above tests determined that -lresolv is needed at
 641# build-time, also set it here for remaining configure-time checks.
 642test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
 643
 644AC_CHECK_LIB([c], [basename],
 645[NEEDS_LIBGEN=],
 646[NEEDS_LIBGEN=YesPlease])
 647AC_SUBST(NEEDS_LIBGEN)
 648test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
 649
 650AC_CHECK_LIB([c], [gettext],
 651[LIBC_CONTAINS_LIBINTL=YesPlease],
 652[LIBC_CONTAINS_LIBINTL=])
 653AC_SUBST(LIBC_CONTAINS_LIBINTL)
 654
 655#
 656# Define NO_GETTEXT if you don't want Git output to be translated.
 657# A translated Git requires GNU libintl or another gettext implementation
 658AC_CHECK_HEADER([libintl.h],
 659[NO_GETTEXT=],
 660[NO_GETTEXT=YesPlease])
 661AC_SUBST(NO_GETTEXT)
 662
 663if test -z "$NO_GETTEXT"; then
 664    test -n "$LIBC_CONTAINS_LIBINTL" || LIBS="$LIBS -lintl"
 665fi
 666
 667## Checks for header files.
 668AC_MSG_NOTICE([CHECKS for header files])
 669#
 670# Define NO_SYS_SELECT_H if you don't have sys/select.h.
 671AC_CHECK_HEADER([sys/select.h],
 672[NO_SYS_SELECT_H=],
 673[NO_SYS_SELECT_H=UnfortunatelyYes])
 674AC_SUBST(NO_SYS_SELECT_H)
 675#
 676# Define NO_SYS_POLL_H if you don't have sys/poll.h
 677AC_CHECK_HEADER([sys/poll.h],
 678[NO_SYS_POLL_H=],
 679[NO_SYS_POLL_H=UnfortunatelyYes])
 680AC_SUBST(NO_SYS_POLL_H)
 681#
 682# Define NO_INTTYPES_H if you don't have inttypes.h
 683AC_CHECK_HEADER([inttypes.h],
 684[NO_INTTYPES_H=],
 685[NO_INTTYPES_H=UnfortunatelyYes])
 686AC_SUBST(NO_INTTYPES_H)
 687#
 688# Define OLD_ICONV if your library has an old iconv(), where the second
 689# (input buffer pointer) parameter is declared with type (const char **).
 690AC_DEFUN([OLDICONVTEST_SRC], [
 691AC_LANG_PROGRAM([[
 692#include <iconv.h>
 693
 694extern size_t iconv(iconv_t cd,
 695                    char **inbuf, size_t *inbytesleft,
 696                    char **outbuf, size_t *outbytesleft);
 697]], [])])
 698
 699GIT_STASH_FLAGS($ICONVDIR)
 700
 701AC_MSG_CHECKING([for old iconv()])
 702AC_COMPILE_IFELSE([OLDICONVTEST_SRC],
 703        [AC_MSG_RESULT([no])],
 704        [AC_MSG_RESULT([yes])
 705        OLD_ICONV=UnfortunatelyYes])
 706
 707GIT_UNSTASH_FLAGS($ICONVDIR)
 708
 709AC_SUBST(OLD_ICONV)
 710
 711## Checks for typedefs, structures, and compiler characteristics.
 712AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
 713#
 714TYPE_SOCKLEN_T
 715case $ac_cv_type_socklen_t in
 716  yes)  ;;
 717  *)    AC_SUBST([SOCKLEN_T], [$git_cv_socklen_t_equiv]) ;;
 718esac
 719
 720# Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
 721AC_CHECK_MEMBER(struct dirent.d_ino,
 722[NO_D_INO_IN_DIRENT=],
 723[NO_D_INO_IN_DIRENT=YesPlease],
 724[#include <dirent.h>])
 725AC_SUBST(NO_D_INO_IN_DIRENT)
 726#
 727# Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
 728# d_type in struct dirent (latest Cygwin -- will be fixed soonish).
 729AC_CHECK_MEMBER(struct dirent.d_type,
 730[NO_D_TYPE_IN_DIRENT=],
 731[NO_D_TYPE_IN_DIRENT=YesPlease],
 732[#include <dirent.h>])
 733AC_SUBST(NO_D_TYPE_IN_DIRENT)
 734#
 735# Define NO_SOCKADDR_STORAGE if your platform does not have struct
 736# sockaddr_storage.
 737AC_CHECK_TYPE(struct sockaddr_storage,
 738[NO_SOCKADDR_STORAGE=],
 739[NO_SOCKADDR_STORAGE=YesPlease],[
 740#include <sys/types.h>
 741#include <sys/socket.h>
 742])
 743AC_SUBST(NO_SOCKADDR_STORAGE)
 744#
 745# Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
 746AC_CHECK_TYPE([struct addrinfo],[
 747 GIT_CHECK_FUNC([getaddrinfo],
 748  [NO_IPV6=],
 749  [NO_IPV6=YesPlease])
 750],[NO_IPV6=YesPlease],[
 751#include <sys/types.h>
 752#include <sys/socket.h>
 753#include <netdb.h>
 754])
 755AC_SUBST(NO_IPV6)
 756#
 757# Define NO_REGEX if you have no or inferior regex support in your C library.
 758AC_CACHE_CHECK([whether the platform regex can handle null bytes],
 759 [ac_cv_c_excellent_regex], [
 760AC_EGREP_CPP(yippeeyeswehaveit,
 761        AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
 762#include <regex.h>
 763],
 764[#ifdef REG_STARTEND
 765yippeeyeswehaveit
 766#endif
 767]),
 768        [ac_cv_c_excellent_regex=yes],
 769        [ac_cv_c_excellent_regex=no])
 770])
 771if test $ac_cv_c_excellent_regex = yes; then
 772        NO_REGEX=
 773else
 774        NO_REGEX=YesPlease
 775fi
 776AC_SUBST(NO_REGEX)
 777#
 778# Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
 779# when attempting to read from an fopen'ed directory.
 780AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
 781 [ac_cv_fread_reads_directories],
 782[
 783AC_RUN_IFELSE(
 784        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
 785                [[char c;
 786                FILE *f = fopen(".", "r");
 787                return f && fread(&c, 1, 1, f)]])],
 788        [ac_cv_fread_reads_directories=no],
 789        [ac_cv_fread_reads_directories=yes])
 790])
 791if test $ac_cv_fread_reads_directories = yes; then
 792        FREAD_READS_DIRECTORIES=UnfortunatelyYes
 793else
 794        FREAD_READS_DIRECTORIES=
 795fi
 796AC_SUBST(FREAD_READS_DIRECTORIES)
 797#
 798# Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
 799# or vsnprintf() return -1 instead of number of characters which would
 800# have been written to the final string if enough space had been available.
 801AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
 802 [ac_cv_snprintf_returns_bogus],
 803[
 804AC_RUN_IFELSE(
 805        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
 806                #include "stdarg.h"
 807
 808                int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
 809                {
 810                  int ret;
 811                  va_list ap;
 812                  va_start(ap, format);
 813                  ret = vsnprintf(str, maxsize, format, ap);
 814                  va_end(ap);
 815                  return ret;
 816                }],
 817                [[char buf[6];
 818                  if (test_vsnprintf(buf, 3, "%s", "12345") != 5
 819                      || strcmp(buf, "12")) return 1;
 820                  if (snprintf(buf, 3, "%s", "12345") != 5
 821                      || strcmp(buf, "12")) return 1]])],
 822        [ac_cv_snprintf_returns_bogus=no],
 823        [ac_cv_snprintf_returns_bogus=yes])
 824])
 825if test $ac_cv_snprintf_returns_bogus = yes; then
 826        SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
 827else
 828        SNPRINTF_RETURNS_BOGUS=
 829fi
 830AC_SUBST(SNPRINTF_RETURNS_BOGUS)
 831
 832
 833## Checks for library functions.
 834## (in default C library and libraries checked by AC_CHECK_LIB)
 835AC_MSG_NOTICE([CHECKS for library functions])
 836#
 837# Define NO_LIBGEN_H if you don't have libgen.h.
 838AC_CHECK_HEADER([libgen.h],
 839[NO_LIBGEN_H=],
 840[NO_LIBGEN_H=YesPlease])
 841AC_SUBST(NO_LIBGEN_H)
 842#
 843# Define HAVE_PATHS_H if you have paths.h.
 844AC_CHECK_HEADER([paths.h],
 845[HAVE_PATHS_H=YesPlease],
 846[HAVE_PATHS_H=])
 847AC_SUBST(HAVE_PATHS_H)
 848#
 849# Define HAVE_LIBCHARSET_H if have libcharset.h
 850AC_CHECK_HEADER([libcharset.h],
 851[HAVE_LIBCHARSET_H=YesPlease],
 852[HAVE_LIBCHARSET_H=])
 853AC_SUBST(HAVE_LIBCHARSET_H)
 854# Define CHARSET_LIB if libiconv does not export the locale_charset symbol
 855# and libcharset does
 856CHARSET_LIB=
 857AC_CHECK_LIB([iconv], [locale_charset],
 858       [],
 859       [AC_CHECK_LIB([charset], [locale_charset],
 860                     [CHARSET_LIB=-lcharset])
 861       ]
 862)
 863AC_SUBST(CHARSET_LIB)
 864#
 865# Define NO_STRCASESTR if you don't have strcasestr.
 866GIT_CHECK_FUNC(strcasestr,
 867[NO_STRCASESTR=],
 868[NO_STRCASESTR=YesPlease])
 869AC_SUBST(NO_STRCASESTR)
 870#
 871# Define NO_STRTOK_R if you don't have strtok_r
 872GIT_CHECK_FUNC(strtok_r,
 873[NO_STRTOK_R=],
 874[NO_STRTOK_R=YesPlease])
 875AC_SUBST(NO_STRTOK_R)
 876#
 877# Define NO_FNMATCH if you don't have fnmatch
 878GIT_CHECK_FUNC(fnmatch,
 879[NO_FNMATCH=],
 880[NO_FNMATCH=YesPlease])
 881AC_SUBST(NO_FNMATCH)
 882#
 883# Define NO_FNMATCH_CASEFOLD if your fnmatch function doesn't have the
 884# FNM_CASEFOLD GNU extension.
 885AC_CACHE_CHECK([whether the fnmatch function supports the FNMATCH_CASEFOLD GNU extension],
 886 [ac_cv_c_excellent_fnmatch], [
 887AC_EGREP_CPP(yippeeyeswehaveit,
 888        AC_LANG_PROGRAM([
 889#include <fnmatch.h>
 890],
 891[#ifdef FNM_CASEFOLD
 892yippeeyeswehaveit
 893#endif
 894]),
 895        [ac_cv_c_excellent_fnmatch=yes],
 896        [ac_cv_c_excellent_fnmatch=no])
 897])
 898if test $ac_cv_c_excellent_fnmatch = yes; then
 899        NO_FNMATCH_CASEFOLD=
 900else
 901        NO_FNMATCH_CASEFOLD=YesPlease
 902fi
 903AC_SUBST(NO_FNMATCH_CASEFOLD)
 904#
 905# Define NO_MEMMEM if you don't have memmem.
 906GIT_CHECK_FUNC(memmem,
 907[NO_MEMMEM=],
 908[NO_MEMMEM=YesPlease])
 909AC_SUBST(NO_MEMMEM)
 910#
 911# Define NO_STRLCPY if you don't have strlcpy.
 912GIT_CHECK_FUNC(strlcpy,
 913[NO_STRLCPY=],
 914[NO_STRLCPY=YesPlease])
 915AC_SUBST(NO_STRLCPY)
 916#
 917# Define NO_UINTMAX_T if your platform does not have uintmax_t
 918AC_CHECK_TYPE(uintmax_t,
 919[NO_UINTMAX_T=],
 920[NO_UINTMAX_T=YesPlease],[
 921#include <inttypes.h>
 922])
 923AC_SUBST(NO_UINTMAX_T)
 924#
 925# Define NO_STRTOUMAX if you don't have strtoumax in the C library.
 926GIT_CHECK_FUNC(strtoumax,
 927[NO_STRTOUMAX=],
 928[NO_STRTOUMAX=YesPlease])
 929AC_SUBST(NO_STRTOUMAX)
 930#
 931# Define NO_SETENV if you don't have setenv in the C library.
 932GIT_CHECK_FUNC(setenv,
 933[NO_SETENV=],
 934[NO_SETENV=YesPlease])
 935AC_SUBST(NO_SETENV)
 936#
 937# Define NO_UNSETENV if you don't have unsetenv in the C library.
 938GIT_CHECK_FUNC(unsetenv,
 939[NO_UNSETENV=],
 940[NO_UNSETENV=YesPlease])
 941AC_SUBST(NO_UNSETENV)
 942#
 943# Define NO_MKDTEMP if you don't have mkdtemp in the C library.
 944GIT_CHECK_FUNC(mkdtemp,
 945[NO_MKDTEMP=],
 946[NO_MKDTEMP=YesPlease])
 947AC_SUBST(NO_MKDTEMP)
 948#
 949# Define NO_MKSTEMPS if you don't have mkstemps in the C library.
 950GIT_CHECK_FUNC(mkstemps,
 951[NO_MKSTEMPS=],
 952[NO_MKSTEMPS=YesPlease])
 953AC_SUBST(NO_MKSTEMPS)
 954#
 955# Define NO_INITGROUPS if you don't have initgroups in the C library.
 956GIT_CHECK_FUNC(initgroups,
 957[NO_INITGROUPS=],
 958[NO_INITGROUPS=YesPlease])
 959AC_SUBST(NO_INITGROUPS)
 960#
 961#
 962# Define NO_MMAP if you want to avoid mmap.
 963#
 964# Define NO_ICONV if your libc does not properly support iconv.
 965
 966
 967## Other checks.
 968# Define USE_PIC if you need the main git objects to be built with -fPIC
 969# in order to build and link perl/Git.so.  x86-64 seems to need this.
 970#
 971# Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
 972# Enable it on Windows.  By default, symrefs are still used.
 973#
 974# Define NO_PTHREADS if we do not have pthreads.
 975#
 976# Define PTHREAD_LIBS to the linker flag used for Pthread support.
 977AC_DEFUN([PTHREADTEST_SRC], [
 978AC_LANG_PROGRAM([[
 979#include <pthread.h>
 980]], [[
 981        pthread_mutex_t test_mutex;
 982        pthread_key_t test_key;
 983        int retcode = 0;
 984        retcode |= pthread_key_create(&test_key, (void *)0);
 985        retcode |= pthread_mutex_init(&test_mutex,(void *)0);
 986        retcode |= pthread_mutex_lock(&test_mutex);
 987        retcode |= pthread_mutex_unlock(&test_mutex);
 988        return retcode;
 989]])])
 990
 991dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
 992dnl   [[#include <pthread.h>]],
 993dnl   [[pthread_mutex_t test_mutex;]]
 994dnl )])
 995
 996NO_PTHREADS=UnfortunatelyYes
 997PTHREAD_LIBS=
 998
 999if test -n "$USER_NOPTHREAD"; then
1000   AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
1001# handle these separately since PTHREAD_CFLAGS could be '-lpthreads
1002# -D_REENTRANT' or some such.
1003elif test -z "$PTHREAD_CFLAGS"; then
1004  threads_found=no
1005  for opt in -mt -pthread -lpthread; do
1006     old_CFLAGS="$CFLAGS"
1007     CFLAGS="$opt $CFLAGS"
1008     AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
1009     AC_LINK_IFELSE([PTHREADTEST_SRC],
1010        [AC_MSG_RESULT([yes])
1011                NO_PTHREADS=
1012                PTHREAD_LIBS="$opt"
1013                PTHREAD_CFLAGS="$opt"
1014                threads_found=yes
1015                break
1016        ],
1017        [AC_MSG_RESULT([no])])
1018      CFLAGS="$old_CFLAGS"
1019  done
1020  if test $threads_found != yes; then
1021    AC_CHECK_LIB([pthread], [pthread_create],
1022        [PTHREAD_LIBS="-lpthread"],
1023        [NO_PTHREADS=UnfortunatelyYes])
1024  fi
1025else
1026  old_CFLAGS="$CFLAGS"
1027  CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
1028  AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
1029  AC_LINK_IFELSE([PTHREADTEST_SRC],
1030        [AC_MSG_RESULT([yes])
1031                NO_PTHREADS=
1032                PTHREAD_LIBS="$PTHREAD_CFLAGS"
1033        ],
1034        [AC_MSG_RESULT([no])])
1035
1036  CFLAGS="$old_CFLAGS"
1037fi
1038
1039CFLAGS="$old_CFLAGS"
1040
1041AC_SUBST(PTHREAD_CFLAGS)
1042AC_SUBST(PTHREAD_LIBS)
1043AC_SUBST(NO_PTHREADS)
1044
1045## Output files
1046AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
1047AC_OUTPUT
1048
1049
1050## Cleanup
1051rm -f "${config_append}"