configure.ac

   1 #                                               -*- Autoconf -*-
   2 # Process this file with autoconf to produce a configure script.
   3
   4 AC_PREREQ(2.59)
   5 AC_INIT([git], [@@GIT_VERSION@@], [git@vger.kernel.org])
   6
   7 AC_CONFIG_SRCDIR([git.c])
   8
   9 config_file=config.mak.autogen
  10 config_append=config.mak.append
  11 config_in=config.mak.in
  12
  13 echo "# ${config_append}.  Generated by configure." > "${config_append}"
  14
  15
  16 ## Definitions of macros
  17 # GIT_CONF_APPEND_LINE(LINE)
  18 # --------------------------
  19 # Append LINE to file ${config_append}
  20 AC_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 AC_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)
  37 AC_DEFUN([GIT_CONF_APPEND_PATH],
  38 [PROGRAM=m4_toupper($1); \
  39 if test "$withval" = "no"; then \
  40         AC_MSG_ERROR([You cannot use git without $1]); \
  41 else \
  42         if test "$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; \
  49 fi; \
  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
  58 AC_DEFUN([GIT_PARSE_WITH],
  59 [PACKAGE=m4_toupper($1); \
  60 if test "$withval" = "no"; then \
  61         m4_toupper(NO_$1)=YesPlease; \
  62 elif test "$withval" = "yes"; then \
  63         m4_toupper(NO_$1)=; \
  64 else \
  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); \
  69 fi \
  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.
  79 AC_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
  92 dnl
  93 dnl GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)
  94 dnl -----------------------------------------
  95 dnl Similar to AC_CHECK_FUNC, but on systems that do not generate
  96 dnl warnings for missing prototypes (e.g. FreeBSD when compiling without
  97 dnl -Wall), it does not work.  By looking for function definition in
  98 dnl libraries, this problem can be worked around.
  99 AC_DEFUN([GIT_CHECK_FUNC],[AC_CHECK_FUNC([$1],[
 100   AC_SEARCH_LIBS([$1],,
 101   [$2],[$3])
 102 ],[$3])])
 103
 104 dnl
 105 dnl GIT_STASH_FLAGS(BASEPATH_VAR)
 106 dnl -----------------------------
 107 dnl Allow for easy stashing of LDFLAGS and CPPFLAGS before running
 108 dnl tests that may want to take user settings into account.
 109 AC_DEFUN([GIT_STASH_FLAGS],[
 110 if test -n "$1"; then
 111    old_CPPFLAGS="$CPPFLAGS"
 112    old_LDFLAGS="$LDFLAGS"
 113    CPPFLAGS="-I$1/include $CPPFLAGS"
 114    LDFLAGS="-L$1/$lib $LDFLAGS"
 115 fi
 116 ])
 117
 118 dnl
 119 dnl GIT_UNSTASH_FLAGS(BASEPATH_VAR)
 120 dnl -----------------------------
 121 dnl Restore the stashed *FLAGS values.
 122 AC_DEFUN([GIT_UNSTASH_FLAGS],[
 123 if test -n "$1"; then
 124    CPPFLAGS="$old_CPPFLAGS"
 125    LDFLAGS="$old_LDFLAGS"
 126 fi
 127 ])
 128
 129 ## Site configuration related to programs (before tests)
 130 ## --with-PACKAGE[=ARG] and --without-PACKAGE
 131 #
 132 # Set lib to alternative name of lib directory (e.g. lib64)
 133 AC_ARG_WITH([lib],
 134  [AS_HELP_STRING([--with-lib=ARG],
 135                  [ARG specifies alternative name for lib directory])],
 136  [if test "$withval" = "no" || test "$withval" = "yes"; then \
 137         AC_MSG_WARN([You should provide name for --with-lib=ARG]); \
 138 else \
 139         lib=$withval; \
 140         AC_MSG_NOTICE([Setting lib to '$lib']); \
 141         GIT_CONF_APPEND_LINE(lib=$withval); \
 142 fi; \
 143 ],[])
 144
 145 if test -z "$lib"; then
 146    AC_MSG_NOTICE([Setting lib to 'lib' (the default)])
 147    lib=lib
 148 fi
 149
 150 AC_ARG_ENABLE([pthreads],
 151  [AS_HELP_STRING([--enable-pthreads=FLAGS],
 152   [FLAGS is the value to pass to the compiler to enable POSIX Threads.]
 153   [The default if FLAGS is not specified is to try first -pthread]
 154   [and then -lpthread.]
 155   [--without-pthreads will disable threading.])],
 156 [
 157 if test "x$enableval" = "xyes"; then
 158    AC_MSG_NOTICE([Will try -pthread then -lpthread to enable POSIX Threads])
 159 elif test "x$enableval" != "xno"; then
 160    PTHREAD_CFLAGS=$enableval
 161    AC_MSG_NOTICE([Setting '$PTHREAD_CFLAGS' as the FLAGS to enable POSIX Threads])
 162 else
 163    AC_MSG_NOTICE([POSIX Threads will be disabled.])
 164    NO_PTHREADS=YesPlease
 165    USER_NOPTHREAD=1
 166 fi],
 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
 173 AC_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.
 187 AC_ARG_WITH(openssl,
 188 AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
 189 AS_HELP_STRING([],              [ARG can be prefix for openssl library and headers]),\
 190 GIT_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.
 198 AC_ARG_WITH(curl,
 199 AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
 200 AS_HELP_STRING([],           [ARG can be also prefix for curl library and headers]),
 201 GIT_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.
 208 AC_ARG_WITH(expat,
 209 AS_HELP_STRING([--with-expat],
 210 [support git-push using http:// and https:// transports via WebDAV (default is YES)])
 211 AS_HELP_STRING([],            [ARG can be also prefix for expat library and headers]),
 212 GIT_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.
 229 AC_ARG_WITH(iconv,
 230 AS_HELP_STRING([--without-iconv],
 231 [if your architecture doesn't properly support iconv])
 232 AS_HELP_STRING([--with-iconv=PATH],
 233 [PATH is prefix for libiconv library and headers])
 234 AS_HELP_STRING([],
 235 [used only if you need linking with libiconv]),
 236 GIT_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
 251 GIT_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
 259 GIT_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
 266 GIT_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.
 274 GIT_ARG_SET_PATH(shell)
 275 #
 276 # Define PERL_PATH to provide path to Perl.
 277 GIT_ARG_SET_PATH(perl)
 278 #
 279 # Define PYTHON_PATH to provide path to Python.
 280 GIT_ARG_SET_PATH(python)
 281 #
 282 # Define ZLIB_PATH to provide path to zlib.
 283 GIT_ARG_SET_PATH(zlib)
 284 #
 285 # Declare the with-tcltk/without-tcltk options.
 286 AC_ARG_WITH(tcltk,
 287 AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
 288 AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter.])
 289 AS_HELP_STRING([],[Bare --with-tcltk will make the GUI part only if])
 290 AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]),\
 291 GIT_PARSE_WITH(tcltk))
 292 #
 293
 294
 295 ## Checks for programs.
 296 AC_MSG_NOTICE([CHECKS for programs])
 297 #
 298 AC_PROG_CC([cc gcc])
 299 # which switch to pass runtime path to dynamic libraries to the linker
 300 AC_CACHE_CHECK([if linker supports -R], git_cv_ld_dashr, [
 301    SAVE_LDFLAGS="${LDFLAGS}"
 302    LDFLAGS="${SAVE_LDFLAGS} -R /"
 303    AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_dashr=yes], [git_cv_ld_dashr=no])
 304    LDFLAGS="${SAVE_LDFLAGS}"
 305 ])
 306 if test "$git_cv_ld_dashr" = "yes"; then
 307    AC_SUBST(CC_LD_DYNPATH, [-R])
 308 else
 309    AC_CACHE_CHECK([if linker supports -Wl,-rpath,], git_cv_ld_wl_rpath, [
 310       SAVE_LDFLAGS="${LDFLAGS}"
 311       LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
 312       AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_wl_rpath=yes], [git_cv_ld_wl_rpath=no])
 313       LDFLAGS="${SAVE_LDFLAGS}"
 314    ])
 315    if test "$git_cv_ld_wl_rpath" = "yes"; then
 316       AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
 317    else
 318       AC_CACHE_CHECK([if linker supports -rpath], git_cv_ld_rpath, [
 319          SAVE_LDFLAGS="${LDFLAGS}"
 320          LDFLAGS="${SAVE_LDFLAGS} -rpath /"
 321          AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [git_cv_ld_rpath=yes], [git_cv_ld_rpath=no])
 322          LDFLAGS="${SAVE_LDFLAGS}"
 323       ])
 324       if test "$git_cv_ld_rpath" = "yes"; then
 325          AC_SUBST(CC_LD_DYNPATH, [-rpath])
 326       else
 327          AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
 328       fi
 329    fi
 330 fi
 331 #AC_PROG_INSTALL                # needs install-sh or install.sh in sources
 332 AC_CHECK_TOOLS(AR, [gar ar], :)
 333 AC_CHECK_PROGS(TAR, [gtar tar])
 334 # TCLTK_PATH will be set to some value if we want Tcl/Tk
 335 # or will be empty otherwise.
 336 if test -z "$NO_TCLTK"; then
 337   if test "$with_tcltk" = ""; then
 338   # No Tcl/Tk switches given. Do not check for Tcl/Tk, use bare 'wish'.
 339     TCLTK_PATH=wish
 340     AC_SUBST(TCLTK_PATH)
 341   elif test "$with_tcltk" = "yes"; then
 342   # Tcl/Tk check requested.
 343     AC_CHECK_PROGS(TCLTK_PATH, [wish], )
 344   else
 345     AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
 346     TCLTK_PATH="$with_tcltk"
 347     AC_SUBST(TCLTK_PATH)
 348   fi
 349 fi
 350 AC_CHECK_PROGS(ASCIIDOC, [asciidoc])
 351 if test -n "$ASCIIDOC"; then
 352         AC_MSG_CHECKING([for asciidoc version])
 353         asciidoc_version=`$ASCIIDOC --version 2>/dev/null`
 354         case "${asciidoc_version}" in
 355         asciidoc' '8*)
 356                 ASCIIDOC8=YesPlease
 357                 AC_MSG_RESULT([${asciidoc_version} > 7])
 358                 ;;
 359         asciidoc' '7*)
 360                 ASCIIDOC8=
 361                 AC_MSG_RESULT([${asciidoc_version}])
 362                 ;;
 363         *)
 364                 ASCIIDOC8=
 365                 AC_MSG_RESULT([${asciidoc_version} (unknown)])
 366                 ;;
 367         esac
 368 fi
 369 AC_SUBST(ASCIIDOC8)
 370
 371
 372 ## Checks for libraries.
 373 AC_MSG_NOTICE([CHECKS for libraries])
 374 #
 375 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
 376 # Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
 377
 378 GIT_STASH_FLAGS($OPENSSLDIR)
 379
 380 AC_CHECK_LIB([crypto], [SHA1_Init],
 381 [NEEDS_SSL_WITH_CRYPTO=],
 382 [AC_CHECK_LIB([ssl], [SHA1_Init],
 383  [NEEDS_SSL_WITH_CRYPTO=YesPlease],
 384  [NEEDS_SSL_WITH_CRYPTO= NO_OPENSSL=YesPlease])])
 385
 386 GIT_UNSTASH_FLAGS($OPENSSLDIR)
 387
 388 AC_SUBST(NEEDS_SSL_WITH_CRYPTO)
 389 AC_SUBST(NO_OPENSSL)
 390
 391 #
 392 # Define NO_CURL if you do not have libcurl installed.  git-http-pull and
 393 # git-http-push are not built, and you cannot use http:// and https://
 394 # transports.
 395
 396 GIT_STASH_FLAGS($CURLDIR)
 397
 398 AC_CHECK_LIB([curl], [curl_global_init],
 399 [NO_CURL=],
 400 [NO_CURL=YesPlease])
 401
 402 GIT_UNSTASH_FLAGS($CURLDIR)
 403
 404 AC_SUBST(NO_CURL)
 405
 406 #
 407 # Define NO_EXPAT if you do not have expat installed.  git-http-push is
 408 # not built, and you cannot push using http:// and https:// transports.
 409
 410 GIT_STASH_FLAGS($EXPATDIR)
 411
 412 AC_CHECK_LIB([expat], [XML_ParserCreate],
 413 [NO_EXPAT=],
 414 [NO_EXPAT=YesPlease])
 415
 416 GIT_UNSTASH_FLAGS($EXPATDIR)
 417
 418 AC_SUBST(NO_EXPAT)
 419
 420 #
 421 # Define NEEDS_LIBICONV if linking with libc is not enough (Darwin and
 422 # some Solaris installations).
 423 # Define NO_ICONV if neither libc nor libiconv support iconv.
 424
 425 if test -z "$NO_ICONV"; then
 426
 427 GIT_STASH_FLAGS($ICONVDIR)
 428
 429 AC_DEFUN([ICONVTEST_SRC], [
 430 #include <iconv.h>
 431
 432 int main(void)
 433 {
 434         iconv_open("", "");
 435         return 0;
 436 }
 437 ])
 438
 439 if test -n "$ICONVDIR"; then
 440    lib_order="-liconv -lc"
 441 else
 442    lib_order="-lc -liconv"
 443 fi
 444
 445 NO_ICONV=YesPlease
 446
 447 for l in $lib_order; do
 448     if test "$l" = "-liconv"; then
 449        NEEDS_LIBICONV=YesPlease
 450     else
 451        NEEDS_LIBICONV=
 452     fi
 453
 454     old_LIBS="$LIBS"
 455     LIBS="$LIBS $l"
 456     AC_MSG_CHECKING([for iconv in $l])
 457     AC_LINK_IFELSE(ICONVTEST_SRC,
 458         [AC_MSG_RESULT([yes])
 459         NO_ICONV=
 460         break],
 461         [AC_MSG_RESULT([no])])
 462     LIBS="$old_LIBS"
 463 done
 464
 465 #in case of break
 466 LIBS="$old_LIBS"
 467
 468 GIT_UNSTASH_FLAGS($ICONVDIR)
 469
 470 AC_SUBST(NEEDS_LIBICONV)
 471 AC_SUBST(NO_ICONV)
 472
 473 if test -n "$NO_ICONV"; then
 474     NEEDS_LIBICONV=
 475 fi
 476
 477 fi
 478
 479 #
 480 # Define NO_DEFLATE_BOUND if deflateBound is missing from zlib.
 481
 482 GIT_STASH_FLAGS($ZLIB_PATH)
 483
 484 AC_DEFUN([ZLIBTEST_SRC], [
 485 #include <zlib.h>
 486
 487 int main(void)
 488 {
 489         deflateBound(0, 0);
 490         return 0;
 491 }
 492 ])
 493 AC_MSG_CHECKING([for deflateBound in -lz])
 494 old_LIBS="$LIBS"
 495 LIBS="$LIBS -lz"
 496 AC_LINK_IFELSE(ZLIBTEST_SRC,
 497         [AC_MSG_RESULT([yes])],
 498         [AC_MSG_RESULT([no])
 499         NO_DEFLATE_BOUND=yes])
 500 LIBS="$old_LIBS"
 501
 502 GIT_UNSTASH_FLAGS($ZLIB_PATH)
 503
 504 AC_SUBST(NO_DEFLATE_BOUND)
 505
 506 #
 507 # Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
 508 # Patrick Mauritz).
 509 AC_CHECK_LIB([c], [socket],
 510 [NEEDS_SOCKET=],
 511 [NEEDS_SOCKET=YesPlease])
 512 AC_SUBST(NEEDS_SOCKET)
 513 test -n "$NEEDS_SOCKET" && LIBS="$LIBS -lsocket"
 514
 515 #
 516 # Define NEEDS_RESOLV if linking with -lnsl and/or -lsocket is not enough.
 517 # Notably on Solaris hstrerror resides in libresolv and on Solaris 7
 518 # inet_ntop and inet_pton additionally reside there.
 519 AC_CHECK_LIB([c], [hstrerror],
 520 [NEEDS_RESOLV=],
 521 [NEEDS_RESOLV=YesPlease])
 522 AC_SUBST(NEEDS_RESOLV)
 523 test -n "$NEEDS_RESOLV" && LIBS="$LIBS -lresolv"
 524
 525 AC_CHECK_LIB([c], [basename],
 526 [NEEDS_LIBGEN=],
 527 [NEEDS_LIBGEN=YesPlease])
 528 AC_SUBST(NEEDS_LIBGEN)
 529 test -n "$NEEDS_LIBGEN" && LIBS="$LIBS -lgen"
 530
 531 ## Checks for header files.
 532 AC_MSG_NOTICE([CHECKS for header files])
 533 #
 534 # Define NO_SYS_SELECT_H if you don't have sys/select.h.
 535 AC_CHECK_HEADER([sys/select.h],
 536 [NO_SYS_SELECT_H=],
 537 [NO_SYS_SELECT_H=UnfortunatelyYes])
 538 AC_SUBST(NO_SYS_SELECT_H)
 539 #
 540 # Define OLD_ICONV if your library has an old iconv(), where the second
 541 # (input buffer pointer) parameter is declared with type (const char **).
 542 AC_DEFUN([OLDICONVTEST_SRC], [[
 543 #include <iconv.h>
 544
 545 extern size_t iconv(iconv_t cd,
 546                     char **inbuf, size_t *inbytesleft,
 547                     char **outbuf, size_t *outbytesleft);
 548
 549 int main(void)
 550 {
 551         return 0;
 552 }
 553 ]])
 554
 555 GIT_STASH_FLAGS($ICONVDIR)
 556
 557 AC_MSG_CHECKING([for old iconv()])
 558 AC_COMPILE_IFELSE(OLDICONVTEST_SRC,
 559         [AC_MSG_RESULT([no])],
 560         [AC_MSG_RESULT([yes])
 561         OLD_ICONV=UnfortunatelyYes])
 562
 563 GIT_UNSTASH_FLAGS($ICONVDIR)
 564
 565 AC_SUBST(OLD_ICONV)
 566
 567 ## Checks for typedefs, structures, and compiler characteristics.
 568 AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics])
 569 #
 570 # Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
 571 AC_CHECK_MEMBER(struct dirent.d_ino,
 572 [NO_D_INO_IN_DIRENT=],
 573 [NO_D_INO_IN_DIRENT=YesPlease],
 574 [#include <dirent.h>])
 575 AC_SUBST(NO_D_INO_IN_DIRENT)
 576 #
 577 # Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
 578 # d_type in struct dirent (latest Cygwin -- will be fixed soonish).
 579 AC_CHECK_MEMBER(struct dirent.d_type,
 580 [NO_D_TYPE_IN_DIRENT=],
 581 [NO_D_TYPE_IN_DIRENT=YesPlease],
 582 [#include <dirent.h>])
 583 AC_SUBST(NO_D_TYPE_IN_DIRENT)
 584 #
 585 # Define NO_SOCKADDR_STORAGE if your platform does not have struct
 586 # sockaddr_storage.
 587 AC_CHECK_TYPE(struct sockaddr_storage,
 588 [NO_SOCKADDR_STORAGE=],
 589 [NO_SOCKADDR_STORAGE=YesPlease],[
 590 #include <sys/types.h>
 591 #include <sys/socket.h>
 592 ])
 593 AC_SUBST(NO_SOCKADDR_STORAGE)
 594 #
 595 # Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
 596 AC_CHECK_TYPE([struct addrinfo],[
 597  GIT_CHECK_FUNC([getaddrinfo],
 598   [NO_IPV6=],
 599   [NO_IPV6=YesPlease])
 600 ],[NO_IPV6=YesPlease],[
 601 #include <sys/types.h>
 602 #include <sys/socket.h>
 603 #include <netdb.h>
 604 ])
 605 AC_SUBST(NO_IPV6)
 606 #
 607 # Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
 608 # do not support the 'size specifiers' introduced by C99, namely ll, hh,
 609 # j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
 610 # some C compilers supported these specifiers prior to C99 as an extension.
 611 AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers],
 612  [ac_cv_c_c99_format],
 613 [# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c
 614 AC_RUN_IFELSE(
 615         [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
 616                 [[char buf[64];
 617                 if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5)
 618                   return 1;
 619                 else if (strcmp(buf, "12345"))
 620                   return 2;]])],
 621         [ac_cv_c_c99_format=yes],
 622         [ac_cv_c_c99_format=no])
 623 ])
 624 if test $ac_cv_c_c99_format = no; then
 625         NO_C99_FORMAT=YesPlease
 626 else
 627         NO_C99_FORMAT=
 628 fi
 629 AC_SUBST(NO_C99_FORMAT)
 630 #
 631 # Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
 632 # when attempting to read from an fopen'ed directory.
 633 AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],
 634  [ac_cv_fread_reads_directories],
 635 [
 636 AC_RUN_IFELSE(
 637         [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
 638                 [[char c;
 639                 FILE *f = fopen(".", "r");
 640                 return f && fread(&c, 1, 1, f)]])],
 641         [ac_cv_fread_reads_directories=no],
 642         [ac_cv_fread_reads_directories=yes])
 643 ])
 644 if test $ac_cv_fread_reads_directories = yes; then
 645         FREAD_READS_DIRECTORIES=UnfortunatelyYes
 646 else
 647         FREAD_READS_DIRECTORIES=
 648 fi
 649 AC_SUBST(FREAD_READS_DIRECTORIES)
 650 #
 651 # Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
 652 # or vsnprintf() return -1 instead of number of characters which would
 653 # have been written to the final string if enough space had been available.
 654 AC_CACHE_CHECK([whether snprintf() and/or vsnprintf() return bogus value],
 655  [ac_cv_snprintf_returns_bogus],
 656 [
 657 AC_RUN_IFELSE(
 658         [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
 659                 #include "stdarg.h"
 660
 661                 int test_vsnprintf(char *str, size_t maxsize, const char *format, ...)
 662                 {
 663                   int ret;
 664                   va_list ap;
 665                   va_start(ap, format);
 666                   ret = vsnprintf(str, maxsize, format, ap);
 667                   va_end(ap);
 668                   return ret;
 669                 }],
 670                 [[char buf[6];
 671                   if (test_vsnprintf(buf, 3, "%s", "12345") != 5
 672                       || strcmp(buf, "12")) return 1;
 673                   if (snprintf(buf, 3, "%s", "12345") != 5
 674                       || strcmp(buf, "12")) return 1]])],
 675         [ac_cv_snprintf_returns_bogus=no],
 676         [ac_cv_snprintf_returns_bogus=yes])
 677 ])
 678 if test $ac_cv_snprintf_returns_bogus = yes; then
 679         SNPRINTF_RETURNS_BOGUS=UnfortunatelyYes
 680 else
 681         SNPRINTF_RETURNS_BOGUS=
 682 fi
 683 AC_SUBST(SNPRINTF_RETURNS_BOGUS)
 684
 685
 686 ## Checks for library functions.
 687 ## (in default C library and libraries checked by AC_CHECK_LIB)
 688 AC_MSG_NOTICE([CHECKS for library functions])
 689 #
 690 # Define NO_LIBGEN_H if you don't have libgen.h.
 691 AC_CHECK_HEADER([libgen.h],
 692 [NO_LIBGEN_H=],
 693 [NO_LIBGEN_H=YesPlease])
 694 AC_SUBST(NO_LIBGEN_H)
 695 #
 696 # Define NO_STRCASESTR if you don't have strcasestr.
 697 GIT_CHECK_FUNC(strcasestr,
 698 [NO_STRCASESTR=],
 699 [NO_STRCASESTR=YesPlease])
 700 AC_SUBST(NO_STRCASESTR)
 701 #
 702 # Define NO_MEMMEM if you don't have memmem.
 703 GIT_CHECK_FUNC(memmem,
 704 [NO_MEMMEM=],
 705 [NO_MEMMEM=YesPlease])
 706 AC_SUBST(NO_MEMMEM)
 707 #
 708 # Define NO_STRLCPY if you don't have strlcpy.
 709 GIT_CHECK_FUNC(strlcpy,
 710 [NO_STRLCPY=],
 711 [NO_STRLCPY=YesPlease])
 712 AC_SUBST(NO_STRLCPY)
 713 #
 714 # Define NO_UINTMAX_T if your platform does not have uintmax_t
 715 AC_CHECK_TYPE(uintmax_t,
 716 [NO_UINTMAX_T=],
 717 [NO_UINTMAX_T=YesPlease],[
 718 #include <inttypes.h>
 719 ])
 720 AC_SUBST(NO_UINTMAX_T)
 721 #
 722 # Define NO_STRTOUMAX if you don't have strtoumax in the C library.
 723 GIT_CHECK_FUNC(strtoumax,
 724 [NO_STRTOUMAX=],
 725 [NO_STRTOUMAX=YesPlease])
 726 AC_SUBST(NO_STRTOUMAX)
 727 #
 728 # Define NO_SETENV if you don't have setenv in the C library.
 729 GIT_CHECK_FUNC(setenv,
 730 [NO_SETENV=],
 731 [NO_SETENV=YesPlease])
 732 AC_SUBST(NO_SETENV)
 733 #
 734 # Define NO_UNSETENV if you don't have unsetenv in the C library.
 735 GIT_CHECK_FUNC(unsetenv,
 736 [NO_UNSETENV=],
 737 [NO_UNSETENV=YesPlease])
 738 AC_SUBST(NO_UNSETENV)
 739 #
 740 # Define NO_MKDTEMP if you don't have mkdtemp in the C library.
 741 GIT_CHECK_FUNC(mkdtemp,
 742 [NO_MKDTEMP=],
 743 [NO_MKDTEMP=YesPlease])
 744 AC_SUBST(NO_MKDTEMP)
 745 #
 746 # Define NO_MKSTEMPS if you don't have mkstemps in the C library.
 747 GIT_CHECK_FUNC(mkstemps,
 748 [NO_MKSTEMPS=],
 749 [NO_MKSTEMPS=YesPlease])
 750 AC_SUBST(NO_MKSTEMPS)
 751 #
 752 #
 753 # Define NO_MMAP if you want to avoid mmap.
 754 #
 755 # Define NO_ICONV if your libc does not properly support iconv.
 756
 757
 758 ## Other checks.
 759 # Define USE_PIC if you need the main git objects to be built with -fPIC
 760 # in order to build and link perl/Git.so.  x86-64 seems to need this.
 761 #
 762 # Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
 763 # Enable it on Windows.  By default, symrefs are still used.
 764 #
 765 # Define NO_PTHREADS if we do not have pthreads
 766 #
 767 # Define PTHREAD_LIBS to the linker flag used for Pthread support and define
 768 # THREADED_DELTA_SEARCH if Pthreads are available.
 769 AC_DEFUN([PTHREADTEST_SRC], [
 770 #include <pthread.h>
 771
 772 int main(void)
 773 {
 774         pthread_mutex_t test_mutex;
 775         return (0);
 776 }
 777 ])
 778
 779 dnl AC_LANG_CONFTEST([AC_LANG_PROGRAM(
 780 dnl   [[#include <pthread.h>]],
 781 dnl   [[pthread_mutex_t test_mutex;]]
 782 dnl )])
 783
 784 NO_PTHREADS=UnfortunatelyYes
 785 THREADED_DELTA_SEARCH=
 786 PTHREAD_LIBS=
 787
 788 if test -n "$USER_NOPTHREAD"; then
 789    AC_MSG_NOTICE([Skipping POSIX Threads at user request.])
 790 # handle these separately since PTHREAD_CFLAGS could be '-lpthreads
 791 # -D_REENTRANT' or some such.
 792 elif test -z "$PTHREAD_CFLAGS"; then
 793   for opt in -pthread -lpthread; do
 794      old_CFLAGS="$CFLAGS"
 795      CFLAGS="$opt $CFLAGS"
 796      AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
 797      AC_LINK_IFELSE(PTHREADTEST_SRC,
 798         [AC_MSG_RESULT([yes])
 799                 NO_PTHREADS=
 800                 PTHREAD_LIBS="$opt"
 801                 THREADED_DELTA_SEARCH=YesPlease
 802                 break
 803         ],
 804         [AC_MSG_RESULT([no])])
 805       CFLAGS="$old_CFLAGS"
 806   done
 807 else
 808   old_CFLAGS="$CFLAGS"
 809   CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
 810   AC_MSG_CHECKING([Checking for POSIX Threads with '$PTHREAD_CFLAGS'])
 811   AC_LINK_IFELSE(PTHREADTEST_SRC,
 812         [AC_MSG_RESULT([yes])
 813                 NO_PTHREADS=
 814                 PTHREAD_LIBS="$PTHREAD_CFLAGS"
 815                 THREADED_DELTA_SEARCH=YesPlease
 816         ],
 817         [AC_MSG_RESULT([no])])
 818
 819   CFLAGS="$old_CFLAGS"
 820 fi
 821
 822 CFLAGS="$old_CFLAGS"
 823
 824 AC_SUBST(PTHREAD_LIBS)
 825 AC_SUBST(NO_PTHREADS)
 826 AC_SUBST(THREADED_DELTA_SEARCH)
 827
 828 ## Output files
 829 AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
 830 AC_OUTPUT
 831
 832
 833 ## Cleanup
 834 rm -f "${config_append}"