Andrew's git / gitweb.git / configure.ac
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configure.acon commit t2300: use documented technique to invoke git-sh-setup (42ac496)
   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
  26AC_DEFUN([GIT_ARG_SET_PATH],
  27[AC_ARG_WITH([$1],
  28 [AS_HELP_STRING([--with-$1=PATH],
  29                 [provide PATH to $1])],
  30 [GIT_CONF_APPEND_PATH($1)],[])
  31])# GIT_ARG_SET_PATH
  32#
  33# GIT_CONF_APPEND_PATH(PROGRAM)
  34# ------------------------------
  35# Parse --with-PROGRAM=PATH option to set PROGRAM_PATH=PATH
  36# Used by GIT_ARG_SET_PATH(PROGRAM)
  37AC_DEFUN([GIT_CONF_APPEND_PATH],
  38[PROGRAM=m4_toupper($1); \
  39if test "$withval" = "no"; then \
  40        AC_MSG_ERROR([You cannot use git without $1]); \
  41else \
  42        if test "$withval" = "yes"; then \
  43                AC_MSG_WARN([You should provide path for --with-$1=PATH]); \
  44        else \
  45                m4_toupper($1)_PATH=$withval; \
  46                AC_MSG_NOTICE([Setting m4_toupper($1)_PATH to $withval]); \
  47                GIT_CONF_APPEND_LINE(${PROGRAM}_PATH=$withval); \
  48        fi; \
  49fi; \
  50]) # GIT_CONF_APPEND_PATH
  51#
  52# GIT_PARSE_WITH(PACKAGE)
  53# -----------------------
  54# For use in AC_ARG_WITH action-if-found, for packages default ON.
  55# * Set NO_PACKAGE=YesPlease for --without-PACKAGE
  56# * Set PACKAGEDIR=PATH for --with-PACKAGE=PATH
  57# * Unset NO_PACKAGE for --with-PACKAGE without ARG
  58AC_DEFUN([GIT_PARSE_WITH],
  59[PACKAGE=m4_toupper($1); \
  60if test "$withval" = "no"; then \
  61        m4_toupper(NO_$1)=YesPlease; \
  62elif test "$withval" = "yes"; then \
  63        m4_toupper(NO_$1)=; \
  64else \
  65        m4_toupper(NO_$1)=; \
  66        m4_toupper($1)DIR=$withval; \
  67        AC_MSG_NOTICE([Setting m4_toupper($1)DIR to $withval]); \
  68        GIT_CONF_APPEND_LINE(${PACKAGE}DIR=$withval); \
  69fi \
  70])# GIT_PARSE_WITH
  71#
  72# GIT_PARSE_WITH_SET_MAKE_VAR(WITHNAME, VAR, HELP_TEXT)
  73# ---------------------
  74# Set VAR to the value specied by --with-WITHNAME.
  75# No verification of arguments is performed, but warnings are issued
  76# if either 'yes' or 'no' is specified.
  77# HELP_TEXT is presented when --help is called.
  78# This is a direct way to allow setting variables in the Makefile.
  79AC_DEFUN([GIT_PARSE_WITH_SET_MAKE_VAR],
  80[AC_ARG_WITH([$1],
  81 [AS_HELP_STRING([--with-$1=VALUE], $3)],
  82 if test -n "$withval"; then \
  83  if test "$withval" = "yes" -o "$withval" = "no"; then \
  84    AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
  85                     [a value for $1 ($2).  Maybe you do...?]); \
  86  fi; \
  87  \
  88  AC_MSG_NOTICE([Setting $2 to $withval]); \
  89  GIT_CONF_APPEND_LINE($2=$withval); \
  90 fi)])# GIT_PARSE_WITH_SET_MAKE_VAR
  91
  92dnl
  93dnl GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
  94dnl -----------------------------------------
  95dnl Similar to AC_CHECK_FUNC, but on systems that do not generate
  96dnl warnings for missing prototypes (e.g. FreeBSD when compiling without
  97dnl -Wall), it does not work.  By looking for function definition in
  98dnl libraries, this problem can be worked around.
  99AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
 100  AC_SEARCH_LIBS([$1],,
 101  [$2],[$3])
 102],[$3])])
 103
 104dnl
 105dnl GIT_STASH_FLAGS(BASEPATH_VAR)
 106dnl -----------------------------
 107dnl Allow for easy stashing of LDFLAGS and CPPFLAGS before running
 108dnl tests that may want to take user settings into account.
 109AC_DEFUN([GIT_STASH_FLAGS],[
 110if test -n "$1"; then
 111   old_CPPFLAGS="$CPPFLAGS"
 112   old_LDFLAGS="$LDFLAGS"
 113   CPPFLAGS="-I$1/include $CPPFLAGS"
 114   LDFLAGS="-L$1/$lib $LDFLAGS"
 115fi
 116])
 117
 118dnl
 119dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
 120dnl -----------------------------
 121dnl Restore the stashed *FLAGS values.
 122AC_DEFUN([GIT_UNSTASH_FLAGS],[
 123if test -n "$1"; then
 124   CPPFLAGS="$old_CPPFLAGS"
 125   LDFLAGS="$old_LDFLAGS"
 126fi
 127])
 128
 129## Site configuration related to programs (before tests)
 130## --with-PACKAGE[=ARG] and --without-PACKAGE
 131#
 132# Set lib to alternative name of lib directory (e.g. lib64)
 133AC_ARG_WITH([lib],
 134 [AS_HELP_STRING([--with-lib=ARG],
 135                 [ARG specifies alternative name for lib directory])],
 136 [if test "$withval" = "no" || test "$withval" = "yes"; then \
 137        AC_MSG_WARN([You should provide name for --with-lib=ARG]); \
 138else \
 139        lib=$withval; \
 140        AC_MSG_NOTICE([Setting lib to '$lib']); \
 141        GIT_CONF_APPEND_LINE(lib=$withval); \
 142fi; \
 143],[])
 144
 145if test -z "$lib"; then
 146   AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
 147   lib=lib
 148fi
 149
 150AC_ARG_ENABLE([pthreads],
 151 [AS_HELP_STRING([--enable-pthreads=FLAGS],
 152  [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
 153  [The default if FLAGS is not specified is to try first -pthread]
 154  [and then -lpthread.]
 155  [--without-pthreads will disable threading.])],
 156[
 157if test "x$enableval" = "xyes"; then
 158   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
 159elif test "x$enableval" != "xno"; then
 160   PTHREAD_CFLAGS=$enableval
 161   AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
 162else
 163   AC_MSG_NOTICE([POSIX Threads will be disabled.])
 164   NO_PTHREADS=YesPlease
 165   USER_NOPTHREAD=1
 166fi],
 167[
 168   AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads.])
 169])
 170
 171## Site configuration (override autodetection)
 172## --with-PACKAGE[=ARG] and --without-PACKAGE
 173AC_MSG_NOTICE([CHECKS for site configuration])
 174#
 175# Define NO_SVN_TESTS if you want to skip time-consuming SVN interoperability
 176# tests.  These tests take up a significant amount of the total test time
 177# but are not needed unless you plan to talk to SVN repos.
 178#
 179# Define PPC_SHA1 environment variable when running make to make use of
 180# a bundled SHA1 routine optimized for PowerPC.
 181#
 182# Define NO_OPENSSL environment variable if you do not have OpenSSL.
 183# This also implies BLK_SHA1.
 184#
 185# Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
 186# /foo/bar/include and /foo/bar/lib directories.
 187AC_ARG_WITH(openssl,
 188AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
 189AS_HELP_STRING([],              [ARG can be prefix for openssl library and headers]),\
 190GIT_PARSE_WITH(openssl))
 191#
 192# Define NO_CURL if you do not have curl installed.  git-http-pull and
 193# git-http-push are not built, and you cannot use http:// and https://
 194# transports.
 195#
 196# Define CURLDIR=/foo/bar if your curl header and library files are in
 197# /foo/bar/include and /foo/bar/lib directories.
 198AC_ARG_WITH(curl,
 199AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
 200AS_HELP_STRING([],           [ARG can be also prefix for curl library and headers]),
 201GIT_PARSE_WITH(curl))
 202#
 203# Define NO_EXPAT if you do not have expat installed.  git-http-push is
 204# not built, and you cannot push using http:// and https:// transports.
 205#
 206# Define EXPATDIR=/foo/bar if your expat header and library files are in
 207# /foo/bar/include and /foo/bar/lib directories.
 208AC_ARG_WITH(expat,
 209AS_HELP_STRING([--with-expat],
 210[support git-push using http:// and https:// transports via WebDAV (default is YES)])
 211AS_HELP_STRING([],            [ARG can be also prefix for expat library and headers]),
 212GIT_PARSE_WITH(expat))
 213#
 214# Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
 215# installed in /sw, but don't want GIT to link against any libraries
 216# installed there.  If defined you may specify your own (or Fink's)
 217# include directories and library directories by defining CFLAGS
 218# and LDFLAGS appropriately.
 219#
 220# Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
 221# have DarwinPorts installed in /opt/local, but don't want GIT to
 222# link against any libraries installed there.  If defined you may
 223# specify your own (or DarwinPort's) include directories and
 224# library directories by defining CFLAGS and LDFLAGS appropriately.
 225#
 226# Define NO_MMAP if you want to avoid mmap.
 227#
 228# Define NO_ICONV if your libc does not properly support iconv.
 229AC_ARG_WITH(iconv,
 230AS_HELP_STRING([--without-iconv],
 231[if your architecture doesn't properly support iconv])
 232AS_HELP_STRING([--with-iconv=PATH],
 233[PATH is prefix for libiconv library and headers])
 234AS_HELP_STRING([],
 235[used only if you need linking with libiconv]),
 236GIT_PARSE_WITH(iconv))
 237
 238## --enable-FEATURE[=ARG] and --disable-FEATURE
 239#
 240# Define USE_NSEC below if you want git to care about sub-second file mtimes
 241# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
 242# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
 243# randomly break unless your underlying filesystem supports those sub-second
 244# times (my ext3 doesn't).
 245#
 246# Define USE_STDEV below if you want git to care about the underlying device
 247# change being considered an inode change from the update-index perspective.
 248
 249#
 250# Allow user to set ETC_GITCONFIG variable
 251GIT_PARSE_WITH_SET_MAKE_VAR(gitconfig, ETC_GITCONFIG,
 252                        Use VALUE instead of /etc/gitconfig as the
 253                        global git configuration file.
 254                        If VALUE is not fully qualified it will be interpretted
 255                        as a path relative to the computed prefix at runtime.)
 256
 257#
 258# Allow user to set the default pager
 259GIT_PARSE_WITH_SET_MAKE_VAR(pager, DEFAULT_PAGER,
 260                        Use VALUE as the fall-back pager instead of 'less'.
 261                        This is used by things like 'git log' when the user
 262                        does not specify a pager to use through alternate
 263                        methods. eg: /usr/bin/pager)
 264#
 265# Allow user to set the default editor
 266GIT_PARSE_WITH_SET_MAKE_VAR(editor, DEFAULT_EDITOR,
 267                        Use VALUE as the fall-back editor instead of 'vi'.
 268                        This is used by things like 'git commit' when the user
 269                        does not specify a preferred editor through other
 270                        methods. eg: /usr/bin/editor)
 271
 272#
 273# Define SHELL_PATH to provide path to shell.
 274GIT_ARG_SET_PATH(shell)
 275#
 276# Define PERL_PATH to provide path to Perl.
 277GIT_ARG_SET_PATH(perl)
 278#
 279# Define ZLIB_PATH to provide path to zlib.
 280GIT_ARG_SET_PATH(zlib)
 281#
 282# Declare the with-tcltk/without-tcltk options.
 283AC_ARG_WITH(tcltk,
 284AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
 285AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
 286AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
 287AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),\
 288GIT_PARSE_WITH(tcltk))
 289#
 290
 291
 292## Checks for programs.
 293AC_MSG_NOTICE([CHECKS for programs])
 294#
 295AC_PROG_CC([cc gcc])
 296# which switch to pass runtime path to dynamic libraries to the linker
 297AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
 298   SAVE_LDFLAGS="${LDFLAGS}"
 299   LDFLAGS="${SAVE_LDFLAGS} -R /"
 300   AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
 301   LDFLAGS="${SAVE_LDFLAGS}"
 302])
 303if test "$git_cv_ld_dashr" = "yes"; then
 304   AC_SUBST(CC_LD_DYNPATH, [-R])
 305else
 306   AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
 307      SAVE_LDFLAGS="${LDFLAGS}"
 308      LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
 309      AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
 310      LDFLAGS="${SAVE_LDFLAGS}"
 311   ])
 312   if test "$git_cv_ld_wl_rpath" = "yes"; then
 313      AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
 314   else
 315      AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
 316         SAVE_LDFLAGS="${LDFLAGS}"
 317         LDFLAGS="${SAVE_LDFLAGS} -rpath /"
 318         AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
 319         LDFLAGS="${SAVE_LDFLAGS}"
 320      ])
 321      if test "$git_cv_ld_rpath" = "yes"; then
 322         AC_SUBST(CC_LD_DYNPATH, [-rpath])
 323      else
 324         AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
 325      fi
 326   fi
 327fi
 328#AC_PROG_INSTALL                # needs install-sh or install.sh in sources
 329AC_CHECK_TOOLS(AR, [gar ar], :)
 330AC_CHECK_PROGS(TAR, [gtar tar])
 331# TCLTK_PATH will be set to some value if we want Tcl/Tk
 332# or will be empty otherwise.
 333if test -z "$NO_TCLTK"; then
 334  if test "$with_tcltk" = ""; then
 335  # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
 336    TCLTK_PATH=wish
 337    AC_SUBST(TCLTK_PATH)
 338  elif test "$with_tcltk" = "yes"; then
 339  # Tcl/Tk check requested.
 340    AC_CHECK_PROGS(TCLTK_PATH, [wish], )
 341  else
 342    AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
 343    TCLTK_PATH="$with_tcltk"
 344    AC_SUBST(TCLTK_PATH)
 345  fi
 346fi
 347AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
 348if test -n "$ASCIIDOC"; then
 349        AC_MSG_CHECKING([for asciidoc version])
 350        asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
 351        case "${asciidoc_version}" in
 352        asciidoc' '8*)
 353                ASCIIDOC8=YesPlease
 354                AC_MSG_RESULT([${asciidoc_version} > 7])
 355                ;;
 356        asciidoc' '7*)
 357                ASCIIDOC8=
 358                AC_MSG_RESULT([${asciidoc_version}])
 359                ;;
 360        *)
 361                ASCIIDOC8=
 362                AC_MSG_RESULT([${asciidoc_version} (unknown)])
 363                ;;
 364        esac
 365fi
 366AC_SUBST(ASCIIDOC8)
 367
 368
 369## Checks for libraries.
 370AC_MSG_NOTICE([CHECKS for libraries])
 371#
 372# Define NO_OPENSSL environment variable if you do not have OpenSSL.
 373# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
 374
 375GIT_STASH_FLAGS($OPENSSLDIR)
 376
 377AC_CHECK_LIB([crypto], [SHA1_Init],
 378[NEEDS_SSL_WITH_CRYPTO=],
 379[AC_CHECK_LIB([ssl], [SHA1_Init],
 380 [NEEDS_SSL_WITH_CRYPTO=YesPlease],
 381 [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
 382
 383GIT_UNSTASH_FLAGS($OPENSSLDIR)
 384
 385AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
 386AC_SUBST(NO_OPENSSL)
 387
 388#
 389# Define NO_CURL if you do not have libcurl installed.  git-http-pull and
 390# git-http-push are not built, and you cannot use http:// and https://
 391# transports.
 392
 393GIT_STASH_FLAGS($CURLDIR)
 394
 395AC_CHECK_LIB([curl], [curl_global_init],
 396[NO_CURL=],
 397[NO_CURL=YesPlease])
 398
 399GIT_UNSTASH_FLAGS($CURLDIR)
 400
 401AC_SUBST(NO_CURL)
 402
 403#
 404# Define NO_EXPAT if you do not have expat installed.  git-http-push is
 405# not built, and you cannot push using http:// and https:// transports.
 406
 407GIT_STASH_FLAGS($EXPATDIR)
 408
 409AC_CHECK_LIB([expat], [XML_ParserCreate],
 410[NO_EXPAT=],
 411[NO_EXPAT=YesPlease])
 412
 413GIT_UNSTASH_FLAGS($EXPATDIR)
 414
 415AC_SUBST(NO_EXPAT)
 416
 417#
 418# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
 419# some Solaris installations).
 420# Define NO_ICONV if neither libc nor libiconv support iconv.
 421
 422if test -z "$NO_ICONV"; then
 423
 424GIT_STASH_FLAGS($ICONVDIR)
 425
 426AC_DEFUN([ICONVTEST_SRC], [
 427#include <iconv.h>
 428
 429int main(void)
 430{
 431        iconv_open("", "");
 432        return 0;
 433}
 434])
 435
 436if test -n "$ICONVDIR"; then
 437   lib_order="-liconv -lc"
 438else
 439   lib_order="-lc -liconv"
 440fi
 441
 442NO_ICONV=YesPlease
 443
 444for l in $lib_order; do
 445    if test "$l" = "-liconv"; then
 446       NEEDS_LIBICONV=YesPlease
 447    else
 448       NEEDS_LIBICONV=
 449    fi
 450
 451    old_LIBS="$LIBS"
 452    LIBS="$LIBS $l"
 453    AC_MSG_CHECKING([for iconv in $l])
 454    AC_LINK_IFELSE(ICONVTEST_SRC,
 455        [AC_MSG_RESULT([yes])
 456        NO_ICONV=
 457        break],
 458        [AC_MSG_RESULT([no])])
 459    LIBS="$old_LIBS"
 460done
 461
 462#in case of break
 463LIBS="$old_LIBS"
 464
 465GIT_UNSTASH_FLAGS($ICONVDIR)
 466
 467AC_SUBST(NEEDS_LIBICONV)
 468AC_SUBST(NO_ICONV)
 469
 470if test -n "$NO_ICONV"; then
 471    NEEDS_LIBICONV=
 472fi
 473
 474fi
 475
 476#
 477# Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
 478
 479GIT_STASH_FLAGS($ZLIB_PATH)
 480
 481AC_DEFUN([ZLIBTEST_SRC], [
 482#include <zlib.h>
 483
 484int main(void)
 485{
 486        deflateBound(0, 0);
 487        return 0;
 488}
 489])
 490AC_MSG_CHECKING([for deflateBound in -lz])
 491old_LIBS="$LIBS"
 492LIBS="$LIBS -lz"
 493AC_LINK_IFELSE(ZLIBTEST_SRC,
 494        [AC_MSG_RESULT([yes])],
 495        [AC_MSG_RESULT([no])
 496        NO_DEFLATE_BOUND=yes])
 497LIBS="$old_LIBS"
 498
 499GIT_UNSTASH_FLAGS($ZLIB_PATH)
 500
 501AC_SUBST(NO_DEFLATE_BOUND)
 502
 503#
 504# Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
 505# Patrick Mauritz).
 506AC_CHECK_LIB([c], [socket],
 507[NEEDS_SOCKET=],
 508[NEEDS_SOCKET=YesPlease])
 509AC_SUBST(NEEDS_SOCKET)
 510test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
 511
 512#
 513# Define NEEDS_RESOLV if linking with -lnsl and/or -lsocket is not enough.
 514# Notably on Solaris hstrerror resides in libresolv and on Solaris 7
 515# inet_ntop and inet_pton additionally reside there.
 516AC_CHECK_LIB([c], [hstrerror],
 517[NEEDS_RESOLV=],
 518[NEEDS_RESOLV=YesPlease])
 519AC_SUBST(NEEDS_RESOLV)
 520test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
 521
 522AC_CHECK_LIB([c], [basename],
 523[NEEDS_LIBGEN=],
 524[NEEDS_LIBGEN=YesPlease])
 525AC_SUBST(NEEDS_LIBGEN)
 526test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
 527
 528## Checks for header files.
 529AC_MSG_NOTICE([CHECKS for header files])
 530#
 531# Define NO_SYS_SELECT_H if you don't have sys/select.h.
 532AC_CHECK_HEADER([sys/select.h],
 533[NO_SYS_SELECT_H=],
 534[NO_SYS_SELECT_H=UnfortunatelyYes])
 535AC_SUBST(NO_SYS_SELECT_H)
 536#
 537# Define OLD_ICONV if your library has an old iconv(), where the second
 538# (input buffer pointer) parameter is declared with type (const char **).
 539AC_DEFUN([OLDICONVTEST_SRC], [[
 540#include <iconv.h>
 541
 542extern size_t iconv(iconv_t cd,
 543                    char **inbuf, size_t *inbytesleft,
 544                    char **outbuf, size_t *outbytesleft);
 545
 546int main(void)
 547{
 548        return 0;
 549}
 550]])
 551
 552GIT_STASH_FLAGS($ICONVDIR)
 553
 554AC_MSG_CHECKING([for old iconv()])
 555AC_COMPILE_IFELSE(OLDICONVTEST_SRC,
 556        [AC_MSG_RESULT([no])],
 557        [AC_MSG_RESULT([yes])
 558        OLD_ICONV=UnfortunatelyYes])
 559
 560GIT_UNSTASH_FLAGS($ICONVDIR)
 561
 562AC_SUBST(OLD_ICONV)
 563
 564## Checks for typedefs, structures, and compiler characteristics.
 565AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
 566#
 567# Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
 568AC_CHECK_MEMBER(struct dirent.d_ino,
 569[NO_D_INO_IN_DIRENT=],
 570[NO_D_INO_IN_DIRENT=YesPlease],
 571[#include <dirent.h>])
 572AC_SUBST(NO_D_INO_IN_DIRENT)
 573#
 574# Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
 575# d_type in struct dirent (latest Cygwin -- will be fixed soonish).
 576AC_CHECK_MEMBER(struct dirent.d_type,
 577[NO_D_TYPE_IN_DIRENT=],
 578[NO_D_TYPE_IN_DIRENT=YesPlease],
 579[#include <dirent.h>])
 580AC_SUBST(NO_D_TYPE_IN_DIRENT)
 581#
 582# Define NO_SOCKADDR_STORAGE if your platform does not have struct
 583# sockaddr_storage.
 584AC_CHECK_TYPE(struct sockaddr_storage,
 585[NO_SOCKADDR_STORAGE=],
 586[NO_SOCKADDR_STORAGE=YesPlease],[
 587#include <sys/types.h>
 588#include <sys/socket.h>
 589])
 590AC_SUBST(NO_SOCKADDR_STORAGE)
 591#
 592# Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
 593AC_CHECK_TYPE([struct addrinfo],[
 594 GIT_CHECK_FUNC([getaddrinfo],
 595  [NO_IPV6=],
 596  [NO_IPV6=YesPlease])
 597],[NO_IPV6=YesPlease],[
 598#include <sys/types.h>
 599#include <sys/socket.h>
 600#include <netdb.h>
 601])
 602AC_SUBST(NO_IPV6)
 603#
 604# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
 605# do not support the 'size specifiers' introduced by C99, namely ll, hh,
 606# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
 607# some C compilers supported these specifiers prior to C99 as an extension.
 608AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers],
 609 [ac_cv_c_c99_format],
 610[# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
 611AC_RUN_IFELSE(
 612        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
 613                [[char buf[64];
 614                if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
 615                  return 1;
 616                else if (strcmp(buf, "12345"))
 617                  return 2;]])],
 618        [ac_cv_c_c99_format=yes],
 619        [ac_cv_c_c99_format=no])
 620])
 621if test $ac_cv_c_c99_format = no; then
 622        NO_C99_FORMAT=YesPlease
 623else
 624        NO_C99_FORMAT=
 625fi
 626AC_SUBST(NO_C99_FORMAT)
 627#
 628# Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
 629# when attempting to read from an fopen'ed directory.
 630AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
 631 [ac_cv_fread_reads_directories],
 632[
 633AC_RUN_IFELSE(
 634        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
 635                [[char c;
 636                FILE *f = fopen(".", "r");
 637                return f && fread(&c, 1, 1, f)]])],
 638        [ac_cv_fread_reads_directories=no],
 639        [ac_cv_fread_reads_directories=yes])
 640])
 641if test $ac_cv_fread_reads_directories = yes; then
 642        FREAD_READS_DIRECTORIES=UnfortunatelyYes
 643else
 644        FREAD_READS_DIRECTORIES=
 645fi
 646AC_SUBST(FREAD_READS_DIRECTORIES)
 647#
 648# Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
 649# or vsnprintf() return -1 instead of number of characters which would
 650# have been written to the final string if enough space had been available.
 651AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
 652 [ac_cv_snprintf_returns_bogus],
 653[
 654AC_RUN_IFELSE(
 655        [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
 656                #include "stdarg.h"
 657
 658                int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
 659                {
 660                  int ret;
 661                  va_list ap;
 662                  va_start(ap, format);
 663                  ret = vsnprintf(str, maxsize, format, ap);
 664                  va_end(ap);
 665                  return ret;
 666                }],
 667                [[char buf[6];
 668                  if (test_vsnprintf(buf, 3, "%s", "12345") != 5
 669                      || strcmp(buf, "12")) return 1;
 670                  if (snprintf(buf, 3, "%s", "12345") != 5
 671                      || strcmp(buf, "12")) return 1]])],
 672        [ac_cv_snprintf_returns_bogus=no],
 673        [ac_cv_snprintf_returns_bogus=yes])
 674])
 675if test $ac_cv_snprintf_returns_bogus = yes; then
 676        SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
 677else
 678        SNPRINTF_RETURNS_BOGUS=
 679fi
 680AC_SUBST(SNPRINTF_RETURNS_BOGUS)
 681
 682
 683## Checks for library functions.
 684## (in default C library and libraries checked by AC_CHECK_LIB)
 685AC_MSG_NOTICE([CHECKS for library functions])
 686#
 687# Define NO_LIBGEN_H if you don't have libgen.h.
 688AC_CHECK_HEADER([libgen.h],
 689[NO_LIBGEN_H=],
 690[NO_LIBGEN_H=YesPlease])
 691AC_SUBST(NO_LIBGEN_H)
 692#
 693# Define NO_STRCASESTR if you don't have strcasestr.
 694GIT_CHECK_FUNC(strcasestr,
 695[NO_STRCASESTR=],
 696[NO_STRCASESTR=YesPlease])
 697AC_SUBST(NO_STRCASESTR)
 698#
 699# Define NO_MEMMEM if you don't have memmem.
 700GIT_CHECK_FUNC(memmem,
 701[NO_MEMMEM=],
 702[NO_MEMMEM=YesPlease])
 703AC_SUBST(NO_MEMMEM)
 704#
 705# Define NO_STRLCPY if you don't have strlcpy.
 706GIT_CHECK_FUNC(strlcpy,
 707[NO_STRLCPY=],
 708[NO_STRLCPY=YesPlease])
 709AC_SUBST(NO_STRLCPY)
 710#
 711# Define NO_UINTMAX_T if your platform does not have uintmax_t
 712AC_CHECK_TYPE(uintmax_t,
 713[NO_UINTMAX_T=],
 714[NO_UINTMAX_T=YesPlease],[
 715#include <inttypes.h>
 716])
 717AC_SUBST(NO_UINTMAX_T)
 718#
 719# Define NO_STRTOUMAX if you don't have strtoumax in the C library.
 720GIT_CHECK_FUNC(strtoumax,
 721[NO_STRTOUMAX=],
 722[NO_STRTOUMAX=YesPlease])
 723AC_SUBST(NO_STRTOUMAX)
 724#
 725# Define NO_SETENV if you don't have setenv in the C library.
 726GIT_CHECK_FUNC(setenv,
 727[NO_SETENV=],
 728[NO_SETENV=YesPlease])
 729AC_SUBST(NO_SETENV)
 730#
 731# Define NO_UNSETENV if you don't have unsetenv in the C library.
 732GIT_CHECK_FUNC(unsetenv,
 733[NO_UNSETENV=],
 734[NO_UNSETENV=YesPlease])
 735AC_SUBST(NO_UNSETENV)
 736#
 737# Define NO_MKDTEMP if you don't have mkdtemp in the C library.
 738GIT_CHECK_FUNC(mkdtemp,
 739[NO_MKDTEMP=],
 740[NO_MKDTEMP=YesPlease])
 741AC_SUBST(NO_MKDTEMP)
 742#
 743# Define NO_MKSTEMPS if you don't have mkstemps in the C library.
 744GIT_CHECK_FUNC(mkstemps,
 745[NO_MKSTEMPS=],
 746[NO_MKSTEMPS=YesPlease])
 747AC_SUBST(NO_MKSTEMPS)
 748#
 749#
 750# Define NO_MMAP if you want to avoid mmap.
 751#
 752# Define NO_ICONV if your libc does not properly support iconv.
 753
 754
 755## Other checks.
 756# Define USE_PIC if you need the main git objects to be built with -fPIC
 757# in order to build and link perl/Git.so.  x86-64 seems to need this.
 758#
 759# Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
 760# Enable it on Windows.  By default, symrefs are still used.
 761#
 762# Define NO_PTHREADS if we do not have pthreads
 763#
 764# Define PTHREAD_LIBS to the linker flag used for Pthread support and define
 765# THREADED_DELTA_SEARCH if Pthreads are available.
 766AC_DEFUN([PTHREADTEST_SRC], [
 767#include <pthread.h>
 768
 769int main(void)
 770{
 771        pthread_mutex_t test_mutex;
 772        return (0);
 773}
 774])
 775
 776dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
 777dnl   [[#include <pthread.h>]],
 778dnl   [[pthread_mutex_t test_mutex;]]
 779dnl )])
 780
 781NO_PTHREADS=UnfortunatelyYes
 782THREADED_DELTA_SEARCH=
 783PTHREAD_LIBS=
 784
 785if test -n "$USER_NOPTHREAD"; then
 786   AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
 787# handle these separately since PTHREAD_CFLAGS could be '-lpthreads
 788# -D_REENTRANT' or some such.
 789elif test -z "$PTHREAD_CFLAGS"; then
 790  for opt in -pthread -lpthread; do
 791     old_CFLAGS="$CFLAGS"
 792     CFLAGS="$opt $CFLAGS"
 793     AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
 794     AC_LINK_IFELSE(PTHREADTEST_SRC,
 795        [AC_MSG_RESULT([yes])
 796                NO_PTHREADS=
 797                PTHREAD_LIBS="$opt"
 798                THREADED_DELTA_SEARCH=YesPlease
 799                break
 800        ],
 801        [AC_MSG_RESULT([no])])
 802      CFLAGS="$old_CFLAGS"
 803  done
 804else
 805  old_CFLAGS="$CFLAGS"
 806  CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
 807  AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
 808  AC_LINK_IFELSE(PTHREADTEST_SRC,
 809        [AC_MSG_RESULT([yes])
 810                NO_PTHREADS=
 811                PTHREAD_LIBS="$PTHREAD_CFLAGS"
 812                THREADED_DELTA_SEARCH=YesPlease
 813        ],
 814        [AC_MSG_RESULT([no])])
 815
 816  CFLAGS="$old_CFLAGS"
 817fi
 818
 819CFLAGS="$old_CFLAGS"
 820
 821AC_SUBST(PTHREAD_LIBS)
 822AC_SUBST(NO_PTHREADS)
 823AC_SUBST(THREADED_DELTA_SEARCH)
 824
 825## Output files
 826AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
 827AC_OUTPUT
 828
 829
 830## Cleanup
 831rm -f "${config_append}"