acinclude.m4

   1 dnl Macros that test for specific features.
   2 dnl This file is part of the Autoconf packaging for Wireshark.
   3 dnl Copyright (C) 1998-2000 by Gerald Combs.
   4 dnl
   5 dnl $Id$
   6 dnl
   7 dnl This program is free software; you can redistribute it and/or modify
   8 dnl it under the terms of the GNU General Public License as published by
   9 dnl the Free Software Foundation; either version 2, or (at your option)
  10 dnl any later version.
  11 dnl
  12 dnl This program is distributed in the hope that it will be useful,
  13 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 dnl GNU General Public License for more details.
  16 dnl
  17 dnl You should have received a copy of the GNU General Public License
  18 dnl along with this program; if not, write to the Free Software
  19 dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20 dnl 02111-1307, USA.
  21 dnl
  22 dnl As a special exception, the Free Software Foundation gives unlimited
  23 dnl permission to copy, distribute and modify the configure scripts that
  24 dnl are the output of Autoconf.  You need not follow the terms of the GNU
  25 dnl General Public License when using or distributing such scripts, even
  26 dnl though portions of the text of Autoconf appear in them.  The GNU
  27 dnl General Public License (GPL) does govern all other use of the material
  28 dnl that constitutes the Autoconf program.
  29 dnl
  30 dnl Certain portions of the Autoconf source text are designed to be copied
  31 dnl (in certain cases, depending on the input) into the output of
  32 dnl Autoconf.  We call these the "data" portions.  The rest of the Autoconf
  33 dnl source text consists of comments plus executable code that decides which
  34 dnl of the data portions to output in any given case.  We call these
  35 dnl comments and executable code the "non-data" portions.  Autoconf never
  36 dnl copies any of the non-data portions into its output.
  37 dnl
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  39 dnl released by the Free Software Foundation.  When you make and
  40 dnl distribute a modified version of Autoconf, you may extend this special
  41 dnl exception to the GPL to apply to your modified version as well, *unless*
  42 dnl your modified version has the potential to copy into its output some
  43 dnl of the text that was the non-data portion of the version that you started
  44 dnl with.  (In other words, unless your change moves or copies text from
  45 dnl the non-data portions to the data portions.)  If your modification has
  46 dnl such potential, you must delete any notice of this special exception
  47 dnl to the GPL from your modified version.
  48 dnl
  49 dnl Written by David MacKenzie, with help from
  50 dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
  51 dnl Roland McGrath, Noah Friedman, david d zuhn, and many others.
  52
  53 #
  54 # AC_WIRESHARK_ADD_DASH_L
  55 #
  56 # Add to the variable specified as the first argument a "-L" flag for the
  57 # directory specified as the second argument, and, on Solaris, add a
  58 # "-R" flag for it as well.
  59 #
  60 # XXX - IRIX, and other OSes, may require some flag equivalent to
  61 # "-R" here.
  62 #
  63 AC_DEFUN([AC_WIRESHARK_ADD_DASH_L],
  64 [$1="$$1 -L$2"
  65 case "$host_os" in
  66   solaris*)
  67     $1="$$1 -R$2"
  68   ;;
  69 esac
  70 ])
  71
  72
  73 #
  74 # AC_WIRESHARK_STRUCT_SA_LEN
  75 #
  76 dnl AC_STRUCT_ST_BLKSIZE extracted from the file in question,
  77 dnl "acspecific.m4" in GNU Autoconf 2.12, and turned into
  78 dnl AC_WIRESHARK_STRUCT_SA_LEN, which checks if "struct sockaddr"
  79 dnl has the 4.4BSD "sa_len" member, and defines HAVE_SA_LEN; that's
  80 dnl what's in this file.
  81 dnl Done by Guy Harris <guy@alum.mit.edu> on 1998-11-14.
  82
  83 dnl ### Checks for structure members
  84
  85 AC_DEFUN([AC_WIRESHARK_STRUCT_SA_LEN],
  86 [AC_CACHE_CHECK([for sa_len in struct sockaddr], ac_cv_wireshark_struct_sa_len,
  87 [AC_TRY_COMPILE([#include <sys/types.h>
  88 #include <sys/socket.h>], [struct sockaddr s; s.sa_len;],
  89 ac_cv_wireshark_struct_sa_len=yes, ac_cv_wireshark_struct_sa_len=no)])
  90 if test $ac_cv_wireshark_struct_sa_len = yes; then
  91   AC_DEFINE(HAVE_SA_LEN, 1, [Define if sa_len field exists in struct sockaddr])
  92 fi
  93 ])
  94
  95
  96 #
  97 # AC_WIRESHARK_IPV6_STACK
  98 #
  99 # By Jun-ichiro "itojun" Hagino, <itojun@iijlab.net>
 100 #
 101 AC_DEFUN([AC_WIRESHARK_IPV6_STACK],
 102 [
 103         v6type=unknown
 104         v6lib=none
 105
 106         AC_MSG_CHECKING([ipv6 stack type])
 107         for i in v6d toshiba kame inria zeta linux linux-glibc solaris8; do
 108                 case $i in
 109                 v6d)
 110                         AC_EGREP_CPP(yes, [
 111 #include </usr/local/v6/include/sys/types.h>
 112 #ifdef __V6D__
 113 yes
 114 #endif],
 115                                 [v6type=$i; v6lib=v6;
 116                                 v6libdir=/usr/local/v6/lib;
 117                                 CFLAGS="-I/usr/local/v6/include $CFLAGS"])
 118                         ;;
 119                 toshiba)
 120                         AC_EGREP_CPP(yes, [
 121 #include <sys/param.h>
 122 #ifdef _TOSHIBA_INET6
 123 yes
 124 #endif],
 125                                 [v6type=$i; v6lib=inet6;
 126                                 v6libdir=/usr/local/v6/lib;
 127                                 CFLAGS="-DINET6 $CFLAGS"])
 128                         ;;
 129                 kame)
 130                         AC_EGREP_CPP(yes, [
 131 #include <netinet/in.h>
 132 #ifdef __KAME__
 133 yes
 134 #endif],
 135                                 [v6type=$i; v6lib=inet6;
 136                                 v6libdir=/usr/local/v6/lib;
 137                                 CFLAGS="-DINET6 $CFLAGS"])
 138                         ;;
 139                 inria)
 140                         AC_EGREP_CPP(yes, [
 141 #include <netinet/in.h>
 142 #ifdef IPV6_INRIA_VERSION
 143 yes
 144 #endif],
 145                                 [v6type=$i; CFLAGS="-DINET6 $CFLAGS"])
 146                         ;;
 147                 zeta)
 148                         AC_EGREP_CPP(yes, [
 149 #include <sys/param.h>
 150 #ifdef _ZETA_MINAMI_INET6
 151 yes
 152 #endif],
 153                                 [v6type=$i; v6lib=inet6;
 154                                 v6libdir=/usr/local/v6/lib;
 155                                 CFLAGS="-DINET6 $CFLAGS"])
 156                         ;;
 157                 linux)
 158                         if test -d /usr/inet6; then
 159                                 v6type=$i
 160                                 v6lib=inet6
 161                                 v6libdir=/usr/inet6
 162                                 CFLAGS="-DINET6 $CFLAGS"
 163                         fi
 164                         ;;
 165                 linux-glibc)
 166                         AC_EGREP_CPP(yes, [
 167 #include <features.h>
 168 #if defined(__GLIBC__) && defined(__GLIBC_MINOR__)
 169 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || __GLIBC__ > 2
 170 yes
 171 #endif
 172 #endif],
 173                         [v6type=$i; v6lib=inet6; CFLAGS="-DINET6 $CFLAGS"])
 174                         ;;
 175                 solaris8)
 176                         if test "`uname -s`" = "SunOS" && test "`uname -r`" = "5.8"; then
 177                                 v6type=$i
 178                                 v6lib=inet6
 179                                 [CFLAGS="-DINET6 -DSOLARIS8_INET6 $CFLAGS"]
 180                         fi
 181                         ;;
 182                 esac
 183                 if test "$v6type" != "unknown"; then
 184                         break
 185                 fi
 186         done
 187
 188         if test "$v6lib" != "none"; then
 189                 for dir in $v6libdir /usr/local/v6/lib /usr/local/lib; do
 190                         if test -d $dir -a -f $dir/lib$v6lib.a; then
 191                                 LIBS="-L$dir $LIBS -l$v6lib"
 192                                 break
 193                         fi
 194                 done
 195                 enable_ipv6="yes"
 196         else
 197                 enable_ipv6="no"
 198         fi
 199         AC_MSG_RESULT(["$v6type, $v6lib"])
 200 ])
 201
 202 #
 203 # AC_WIRESHARK_GETHOSTBY_LIB_CHECK
 204 #
 205 # Checks whether we need "-lnsl" to get "gethostby*()", which we use
 206 # in "resolv.c".
 207 #
 208 # Adapted from stuff in the AC_PATH_XTRA macro in "acspecific.m4" in
 209 # GNU Autoconf 2.13; the comment came from there.
 210 # Done by Guy Harris <guy@alum.mit.edu> on 2000-01-14.
 211 #
 212 AC_DEFUN([AC_WIRESHARK_GETHOSTBY_LIB_CHECK],
 213 [
 214     # msh@cis.ufl.edu says -lnsl (and -lsocket) are needed for his 386/AT,
 215     # to get the SysV transport functions.
 216     # chad@anasazi.com says the Pyramid MIS-ES running DC/OSx (SVR4)
 217     # needs -lnsl.
 218     # The nsl library prevents programs from opening the X display
 219     # on Irix 5.2, according to dickey@clark.net.
 220     AC_CHECK_FUNC(gethostbyname, ,
 221         AC_CHECK_LIB(nsl, gethostbyname, NSL_LIBS="-lnsl"))
 222     AC_SUBST(NSL_LIBS)
 223 ])
 224
 225 #
 226 # AC_WIRESHARK_SOCKET_LIB_CHECK
 227 #
 228 # Checks whether we need "-lsocket" to get "socket()", which is used
 229 # by libpcap on some platforms - and, in effect, "gethostby*()" on
 230 # most if not all platforms (so that it can use NIS or DNS or...
 231 # to look up host names).
 232 #
 233 # Adapted from stuff in the AC_PATH_XTRA macro in "acspecific.m4" in
 234 # GNU Autoconf 2.13; the comment came from there.
 235 # Done by Guy Harris <guy@alum.mit.edu> on 2000-01-14.
 236 #
 237 # We use "connect" because that's what AC_PATH_XTRA did.
 238 #
 239 AC_DEFUN([AC_WIRESHARK_SOCKET_LIB_CHECK],
 240 [
 241     # lieder@skyler.mavd.honeywell.com says without -lsocket,
 242     # socket/setsockopt and other routines are undefined under SCO ODT
 243     # 2.0.  But -lsocket is broken on IRIX 5.2 (and is not necessary
 244     # on later versions), says simon@lia.di.epfl.ch: it contains
 245     # gethostby* variants that don't use the nameserver (or something).
 246     # -lsocket must be given before -lnsl if both are needed.
 247     # We assume that if connect needs -lnsl, so does gethostbyname.
 248     AC_CHECK_FUNC(connect, ,
 249       AC_CHECK_LIB(socket, connect, SOCKET_LIBS="-lsocket",
 250                 AC_MSG_ERROR(Function 'socket' not found.), $NSL_LIBS))
 251     AC_SUBST(SOCKET_LIBS)
 252 ])
 253
 254 #
 255 # AC_WIRESHARK_BREAKLOOP_TRY_LINK
 256 #
 257 AC_DEFUN([AC_WIRESHARK_PCAP_BREAKLOOP_TRY_LINK],
 258 [
 259   AC_LINK_IFELSE(
 260   [
 261       AC_LANG_SOURCE(
 262       [[
 263 #       include <pcap.h>
 264         int main(void)
 265         {
 266           pcap_t  *pct = NULL;
 267           pcap_breakloop(pct);
 268           return 0;
 269         }
 270       ]])
 271   ],
 272   [
 273     ws_breakloop_compiled=yes
 274   ],
 275   [
 276     ws_breakloop_compiled=no
 277   ])
 278 ])
 279
 280
 281
 282 #
 283 # AC_WIRESHARK_PCAP_CHECK
 284 #
 285 AC_DEFUN([AC_WIRESHARK_PCAP_CHECK],
 286 [
 287         if test -z "$pcap_dir"
 288         then
 289           # Pcap header checks
 290           # XXX need to set a var AC_CHECK_HEADER(pcap.h,,)
 291
 292           #
 293           # The user didn't specify a directory in which libpcap resides;
 294           # we assume that the current library search path will work,
 295           # but we may have to look for the header in a "pcap"
 296           # subdirectory of "/usr/include" or "/usr/local/include",
 297           # as some systems apparently put "pcap.h" in a "pcap"
 298           # subdirectory, and we also check "$prefix/include" - and
 299           # "$prefix/include/pcap", in case $prefix is set to
 300           # "/usr/include" or "/usr/local/include".
 301           #
 302           # XXX - should we just add "$prefix/include" to the include
 303           # search path and "$prefix/lib" to the library search path?
 304           #
 305           AC_MSG_CHECKING(for extraneous pcap header directories)
 306           found_pcap_dir=""
 307           pcap_dir_list="/usr/include/pcap $prefix/include/pcap $prefix/include"
 308           if test "x$ac_cv_enable_usr_local" = "xyes" ; then
 309             pcap_dir_list="$pcap_dir_list /usr/local/include/pcap"
 310           fi
 311           for pcap_dir in $pcap_dir_list
 312           do
 313             if test -d $pcap_dir ; then
 314                 if test x$pcap_dir != x/usr/include -a x$pcap_dir != x/usr/local/include ; then
 315                     CFLAGS="$CFLAGS -I$pcap_dir"
 316                     CPPFLAGS="$CPPFLAGS -I$pcap_dir"
 317                 fi
 318                 found_pcap_dir=" $found_pcap_dir -I$pcap_dir"
 319                 break
 320             fi
 321           done
 322
 323           if test "$found_pcap_dir" != "" ; then
 324             AC_MSG_RESULT(found --$found_pcap_dir added to CFLAGS)
 325           else
 326             AC_MSG_RESULT(not found)
 327           fi
 328         else
 329           #
 330           # The user specified a directory in which libpcap resides,
 331           # so add the "include" subdirectory of that directory to
 332           # the include file search path and the "lib" subdirectory
 333           # of that directory to the library search path.
 334           #
 335           # XXX - if there's also a libpcap in a directory that's
 336           # already in CFLAGS, CPPFLAGS, or LDFLAGS, this won't
 337           # make us find the version in the specified directory,
 338           # as the compiler and/or linker will search that other
 339           # directory before it searches the specified directory.
 340           #
 341           CFLAGS="$CFLAGS -I$pcap_dir/include"
 342           CPPFLAGS="$CPPFLAGS -I$pcap_dir/include"
 343           AC_WIRESHARK_ADD_DASH_L(LDFLAGS, $pcap_dir/lib)
 344         fi
 345
 346         # Pcap header check
 347         AC_CHECK_HEADER(pcap.h,,
 348             AC_MSG_ERROR([[Header file pcap.h not found; if you installed libpcap
 349 from source, did you also do \"make install-incl\", and if you installed a
 350 binary package of libpcap, is there also a developer's package of libpcap,
 351 and did you also install that package?]]))
 352
 353         #
 354         # Check to see if we find "pcap_open_live" in "-lpcap".
 355         # Also check for various additional libraries that libpcap might
 356         # require.
 357         #
 358         AC_CHECK_LIB(pcap, pcap_open_live,
 359           [
 360             PCAP_LIBS=-lpcap
 361             AC_DEFINE(HAVE_LIBPCAP, 1, [Define to use libpcap library])
 362           ], [
 363             ac_wireshark_extras_found=no
 364             ac_save_LIBS="$LIBS"
 365             for extras in "-lcfg -lodm" "-lpfring"
 366             do
 367                 AC_MSG_CHECKING([for pcap_open_live in -lpcap with $extras])
 368                 LIBS="-lpcap $extras"
 369                 #
 370                 # XXX - can't we use AC_CHECK_LIB here?
 371                 #
 372                 AC_TRY_LINK(
 373                     [
 374 #       include <pcap.h>
 375                     ],
 376                     [
 377         pcap_open_live(NULL, 0, 0, 0, NULL);
 378                     ],
 379                     [
 380                         ac_wireshark_extras_found=yes
 381                         AC_MSG_RESULT([yes])
 382                         PCAP_LIBS="-lpcap $extras"
 383                         AC_DEFINE(HAVE_LIBPCAP, 1, [Define to use libpcap library])
 384                     ],
 385                     [
 386                         AC_MSG_RESULT([no])
 387                     ])
 388                 if test x$ac_wireshark_extras_found = xyes
 389                 then
 390                     break
 391                 fi
 392             done
 393             if test x$ac_wireshark_extras_found = xno
 394             then
 395                 AC_MSG_ERROR([Can't link with library libpcap.])
 396             fi
 397             LIBS=$ac_save_LIBS
 398           ], $SOCKET_LIBS $NSL_LIBS)
 399         AC_SUBST(PCAP_LIBS)
 400
 401         #
 402         # Check whether various variables and functions are defined by
 403         # libpcap.
 404         #
 405         ac_save_LIBS="$LIBS"
 406         AC_MSG_CHECKING(whether pcap_version is defined by libpcap)
 407         LIBS="$PCAP_LIBS $SOCKET_LIBS $NSL_LIBS $LIBS"
 408         AC_TRY_LINK(
 409            [
 410 #       include <stdio.h>
 411         extern char *pcap_version;
 412            ],
 413            [
 414         printf ("%s\n", pcap_version);
 415            ],
 416            ac_cv_pcap_version_defined=yes,
 417            ac_cv_pcap_version_defined=no,
 418            [echo $ac_n "cross compiling; assumed OK... $ac_c"])
 419         if test "$ac_cv_pcap_version_defined" = yes ; then
 420                 AC_MSG_RESULT(yes)
 421                 AC_DEFINE(HAVE_PCAP_VERSION, 1, [Define if libpcap version is known])
 422         else
 423                 AC_MSG_RESULT(no)
 424         fi
 425         AC_CHECK_FUNCS(pcap_open_dead pcap_freecode)
 426         #
 427         # pcap_breakloop may be present in the library but not declared
 428         # in the pcap.h header file.  If it's not declared in the header
 429         # file, attempts to use it will get warnings, and, if we're
 430         # building with warnings treated as errors, that warning will
 431         # cause compilation to fail.
 432         #
 433         # We are therefore first testing whether the function is present
 434         # and then, if we're compiling with warnings as errors, testing
 435         # whether it is usable.  It is usable if it compiles without
 436         # a -Wimplicit warning (the "compile with warnings as errors"
 437         # option requires GCC). If it is not usable, we fail and tell
 438         # the user that the pcap.h header needs to be updated.
 439         #
 440         # Ceteris paribus, this should only happen with Mac OS X 10.3[.x] which
 441         # can have an up-to-date pcap library without the corresponding pcap
 442         # header.
 443         #
 444         # However, it might also happen on some others OSes with some erroneous
 445         # system manipulations where multiple versions of libcap might co-exist
 446         # e.g. hand made symbolic link from libpcap.so -> libpcap.so.0.8 but
 447         # having the pcap header version 0.7.
 448         #
 449         AC_MSG_CHECKING([whether pcap_breakloop is present])
 450         ac_CFLAGS_saved="$CFLAGS"
 451         AC_WIRESHARK_PCAP_BREAKLOOP_TRY_LINK
 452         if test "x$ws_breakloop_compiled" = "xyes"; then
 453           AC_MSG_RESULT(yes)
 454           AC_DEFINE(HAVE_PCAP_BREAKLOOP, 1, [Define if pcap_breakloop is known])
 455           if test "x$with_warnings_as_errors" = "xyes"; then
 456             AC_MSG_CHECKING([whether pcap_breakloop is usable])
 457             CFLAGS="$CFLAGS -Werror -Wimplicit"
 458             AC_WIRESHARK_PCAP_BREAKLOOP_TRY_LINK
 459             if test "x$ws_breakloop_compiled" = "xyes"; then
 460               AC_MSG_RESULT(yes)
 461             else
 462               AC_MSG_RESULT(no)
 463               AC_MSG_ERROR(
 464 [Your pcap library is more recent than your pcap header.
 465 As you are building with compiler warnings treated as errors, Wireshark
 466 won't be able to use functions not declared in that header.
 467 If you wish to build with compiler warnings treated as errors, You should
 468 install a newer version of the header file.])
 469             fi
 470             CFLAGS="$ac_CFLAGS_saved"
 471           fi
 472         else
 473           AC_MSG_RESULT(no)
 474         fi
 475
 476         #
 477         # Later versions of Mac OS X 10.3[.x] ship a pcap.h that
 478         # doesn't define pcap_if_t but ship an 0.8[.x] libpcap,
 479         # so the library has "pcap_findalldevs()", but pcap.h
 480         # doesn't define "pcap_if_t" so you can't actually *use*
 481         # "pcap_findalldevs()".
 482         #
 483         # That even appears to be true of systems shipped with
 484         # 10.3.4, so it doesn't appear only to be a case of
 485         # Software Update not updating header files.
 486         #
 487         # (You can work around this by installing the 0.8 header
 488         # files.)
 489         #
 490         AC_CACHE_CHECK([whether pcap_findalldevs is present and usable],
 491           [ac_cv_func_pcap_findalldevs],
 492           [
 493             AC_LINK_IFELSE(
 494               [
 495                 AC_LANG_SOURCE(
 496                   [[
 497                     #include <pcap.h>
 498                     main()
 499                     {
 500                       pcap_if_t *devpointer;
 501                       char errbuf[1];
 502
 503                       pcap_findalldevs(&devpointer, errbuf);
 504                     }
 505                   ]])
 506               ],
 507               [
 508                 ac_cv_func_pcap_findalldevs=yes
 509               ],
 510               [
 511                 ac_cv_func_pcap_findalldevs=no
 512               ])
 513           ])
 514         #
 515         # Don't check for other new routines that showed up after
 516         # "pcap_findalldevs()" if we don't have a usable
 517         # "pcap_findalldevs()", so we don't end up using them if the
 518         # "pcap.h" is crufty and old and doesn't declare them.
 519         #
 520         if test $ac_cv_func_pcap_findalldevs = "yes" ; then
 521           AC_DEFINE(HAVE_PCAP_FINDALLDEVS, 1,
 522            [Define to 1 if you have the `pcap_findalldevs' function and a pcap.h that declares pcap_if_t.])
 523           AC_CHECK_FUNCS(pcap_datalink_val_to_name pcap_datalink_name_to_val)
 524           AC_CHECK_FUNCS(pcap_datalink_val_to_description)
 525           AC_CHECK_FUNCS(pcap_list_datalinks pcap_set_datalink pcap_lib_version)
 526           AC_CHECK_FUNCS(pcap_get_selectable_fd pcap_free_datalinks)
 527         fi
 528         LIBS="$ac_save_LIBS"
 529 ])
 530
 531 AC_DEFUN([AC_WIRESHARK_PCAP_REMOTE_CHECK],
 532 [
 533     ac_save_LIBS="$LIBS"
 534     LIBS="$PCAP_LIBS $SOCKET_LIBS $NSL_LIBS $LIBS"
 535     AC_DEFINE(HAVE_REMOTE, 1, [Define to 1 to enable remote
 536               capturing feature in WinPcap library])
 537     AC_CHECK_FUNCS(pcap_open pcap_findalldevs_ex pcap_createsrcstr)
 538     if test $ac_cv_func_pcap_open = "yes" -a \
 539             $ac_cv_func_pcap_findalldevs_ex = "yes" -a \
 540             $ac_cv_func_pcap_createsrcstr = "yes" ; then
 541         AC_DEFINE(HAVE_PCAP_REMOTE, 1,
 542             [Define to 1 if you have WinPcap remote capturing support and prefer to use these new API features.])
 543     fi
 544     AC_CHECK_FUNCS(pcap_setsampling)
 545     LIBS="$ac_save_LIBS"
 546 ])
 547
 548 #
 549 # AC_WIRESHARK_ZLIB_CHECK
 550 #
 551 AC_DEFUN([AC_WIRESHARK_ZLIB_CHECK],
 552 [
 553         if test "x$zlib_dir" != "x"
 554         then
 555           #
 556           # The user specified a directory in which zlib resides,
 557           # so add the "include" subdirectory of that directory to
 558           # the include file search path and the "lib" subdirectory
 559           # of that directory to the library search path.
 560           #
 561           # XXX - if there's also a zlib in a directory that's
 562           # already in CFLAGS, CPPFLAGS, or LDFLAGS, this won't
 563           # make us find the version in the specified directory,
 564           # as the compiler and/or linker will search that other
 565           # directory before it searches the specified directory.
 566           #
 567           wireshark_save_CFLAGS="$CFLAGS"
 568           CFLAGS="$CFLAGS -I$zlib_dir/include"
 569           wireshark_save_CPPFLAGS="$CPPFLAGS"
 570           CPPFLAGS="$CPPFLAGS -I$zlib_dir/include"
 571           wireshark_save_LIBS="$LIBS"
 572           AC_WIRESHARK_ADD_DASH_L(LIBS, $zlib_dir/lib)
 573         fi
 574
 575         #
 576         # Make sure we have "zlib.h".  If we don't, it means we probably
 577         # don't have zlib, so don't use it.
 578         #
 579         AC_CHECK_HEADER(zlib.h,,
 580           [
 581             if test "x$zlib_dir" != "x"
 582             then
 583               #
 584               # The user used "--with-zlib=" to specify a directory
 585               # containing zlib, but we didn't find the header file
 586               # there; that either means they didn't specify the
 587               # right directory or are confused about whether zlib
 588               # is, in fact, installed.  Report the error and give up.
 589               #
 590               AC_MSG_ERROR([zlib header not found in directory specified in --with-zlib])
 591             else
 592               if test "x$want_zlib" = "xyes"
 593               then
 594                 #
 595                 # The user tried to force us to use the library, but we
 596                 # couldn't find the header file; report an error.
 597                 #
 598                 AC_MSG_ERROR(Header file zlib.h not found.)
 599               else
 600                 #
 601                 # We couldn't find the header file; don't use the
 602                 # library, as it's probably not present.
 603                 #
 604                 want_zlib=no
 605               fi
 606             fi
 607           ])
 608
 609         if test "x$want_zlib" != "xno"
 610         then
 611                 #
 612                 # Well, we at least have the zlib header file.
 613                 #
 614                 # Check for "gzgets()" in zlib, because we need it, but
 615                 # some older versions of zlib don't have it.  It appears
 616                 # from the zlib ChangeLog that any released version of zlib
 617                 # with "gzgets()" should have the other routines we
 618                 # depend on, such as "gzseek()", "gztell()", and "zError()".
 619                 #
 620                 # Another reason why we require "gzgets()" is that
 621                 # some versions of zlib that didn't have it, such
 622                 # as 1.0.8, had a bug in "gzseek()" that meant that it
 623                 # doesn't work correctly on uncompressed files; this
 624                 # means we cannot use version 1.0.8.  (Unfortunately,
 625                 # that's the version that comes with recent X11 source,
 626                 # and many people who install XFree86 on their Slackware
 627                 # boxes don't realize that they should configure it to
 628                 # use the native zlib rather than building and installing
 629                 # the crappy old version that comes with XFree86.)
 630                 #
 631                 # I.e., we can't just avoid using "gzgets()", as
 632                 # versions of zlib without "gzgets()" are likely to have
 633                 # a broken "gzseek()".
 634                 #
 635                 AC_CHECK_LIB(z, gzgets,
 636                 [
 637                         if test "x$zlib_dir" != "x"
 638                         then
 639                                 #
 640                                 # Put the "-I" and "-L" flags for zlib at
 641                                 # the beginning of CFLAGS, CPPFLAGS, and
 642                                 # LIBS.
 643                                 #
 644                                 LIBS=""
 645                                 AC_WIRESHARK_ADD_DASH_L(LIBS, $zlib_dir/lib)
 646                                 LIBS="$LIBS -lz $wireshark_save_LIBS"
 647                         else
 648                                 LIBS="-lz $LIBS"
 649                         fi
 650                         AC_DEFINE(HAVE_LIBZ, 1, [Define to use libz library])
 651                 ],[
 652                         if test "x$zlib_dir" != "x"
 653                         then
 654                                 #
 655                                 # Restore the versions of CFLAGS, CPPFLAGS,
 656                                 # and LIBS before we added the "-with-zlib="
 657                                 # directory, as we didn't actually find
 658                                 # zlib there, or didn't find a zlib that
 659                                 # contains gzgets there.
 660                                 #
 661                                 CFLAGS="$wireshark_save_CFLAGS"
 662                                 CPPFLAGS="$wireshark_save_CPPFLAGS"
 663                                 LIBS="$wireshark_save_LIBS"
 664                         fi
 665                         want_zlib=no
 666                 ])
 667         fi
 668
 669         if test "x$want_zlib" != "xno"
 670         then
 671                 #
 672                 # Well, we at least have the zlib header file and a zlib
 673                 # with "gzgets()".
 674                 #
 675                 # Now check for "gzgets()" in zlib when linking with the
 676                 # linker flags for GTK+ applications; people often grab
 677                 # XFree86 source and build and install it on their systems,
 678                 # and they appear sometimes to misconfigure XFree86 so that,
 679                 # even on systems with zlib, it assumes there is no zlib,
 680                 # so the XFree86 build process builds and installs its
 681                 # own zlib in the X11 library directory.
 682                 #
 683                 # The XFree86 zlib is an older version that lacks
 684                 # "gzgets()", and that's the zlib with which Wireshark
 685                 # gets linked, so the build of Wireshark fails.
 686                 #
 687                 ac_save_CFLAGS="$CFLAGS"
 688                 ac_save_LIBS="$LIBS"
 689                 CFLAGS="$CFLAGS $GTK_CFLAGS"
 690                 LIBS="$GTK_LIBS -lz $LIBS"
 691                 AC_MSG_CHECKING([for gzgets missing when linking with X11])
 692                 AC_TRY_LINK_FUNC(gzgets, AC_MSG_RESULT(no),
 693                   [
 694                     AC_MSG_RESULT(yes)
 695                     AC_MSG_ERROR(old zlib found when linking with X11 - get rid of old zlib.)
 696                   ])
 697                 CFLAGS="$ac_save_CFLAGS"
 698                 LIBS="$ac_save_LIBS"
 699         fi
 700 ])
 701
 702 #
 703 # AC_WIRESHARK_LIBPCRE_CHECK
 704 #
 705 AC_DEFUN([AC_WIRESHARK_LIBPCRE_CHECK],
 706 [
 707         if test "x$pcre_dir" != "x"
 708         then
 709           #
 710           # The user specified a directory in which libpcre resides,
 711           # so add the "include" subdirectory of that directory to
 712           # the include file search path and the "lib" subdirectory
 713           # of that directory to the library search path.
 714           #
 715           # XXX - if there's also a libpcre in a directory that's
 716           # already in CFLAGS, CPPFLAGS, or LDFLAGS, this won't
 717           # make us find the version in the specified directory,
 718           # as the compiler and/or linker will search that other
 719           # directory before it searches the specified directory.
 720           #
 721           wireshark_save_CFLAGS="$CFLAGS"
 722           CFLAGS="$CFLAGS -I$pcre_dir/include"
 723           wireshark_save_CPPFLAGS="$CPPFLAGS"
 724           CPPFLAGS="$CPPFLAGS -I$pcre_dir/include"
 725           wireshark_save_LIBS="$LIBS"
 726           LIBS="$LIBS -lpcre"
 727           wireshark_save_LDFLAGS="$LDFLAGS"
 728           LDFLAGS="$LDFLAGS -L$pcre_dir/lib"
 729         fi
 730
 731         #
 732         # Make sure we have "pcre.h".  If we don't, it means we probably
 733         # don't have libpcre, so don't use it.
 734         #
 735         AC_CHECK_HEADER(pcre.h,,
 736           [
 737             if test "x$pcre_dir" != "x"
 738             then
 739               #
 740               # The user used "--with-pcre=" to specify a directory
 741               # containing libpcre, but we didn't find the header file
 742               # there; that either means they didn't specify the
 743               # right directory or are confused about whether libpcre
 744               # is, in fact, installed.  Report the error and give up.
 745               #
 746               AC_MSG_ERROR([libpcre header not found in directory specified in --with-pcre])
 747             else
 748               if test "x$want_pcre" = "xyes"
 749               then
 750                 #
 751                 # The user tried to force us to use the library, but we
 752                 # couldn't find the header file; report an error.
 753                 #
 754                 AC_MSG_ERROR(Header file pcre.h not found.)
 755               else
 756                 #
 757                 # We couldn't find the header file; don't use the
 758                 # library, as it's probably not present.
 759                 #
 760                 want_pcre=no
 761               fi
 762             fi
 763           ])
 764
 765         if test "x$want_pcre" != "xno"
 766         then
 767                 #
 768                 # Well, we at least have the pcre header file.
 769                 #
 770                 # We're only using standard functions from libpcre,
 771                 # so we don't need to perform extra checks.
 772                 #
 773                 AC_CHECK_LIB(pcre, pcre_compile,
 774                 [
 775                         if test "x$pcre_dir" != "x"
 776                         then
 777                                 #
 778                                 # Put the "-I" and "-L" flags for pcre at
 779                                 # the beginning of CFLAGS, CPPFLAGS,
 780                                 # LDFLAGS, and LIBS.
 781                                 #
 782                                 PCRE_LIBS="-L$pcre_dir/lib -lpcre $wireshark_save_LIBS"
 783                         else
 784                                 PCRE_LIBS="-lpcre"
 785                         fi
 786                         AC_DEFINE(HAVE_LIBPCRE, 1, [Define to use libpcre library])
 787                 ],[
 788                         if test "x$pcre_dir" != "x"
 789                         then
 790                                 #
 791                                 # Restore the versions of CFLAGS, CPPFLAGS,
 792                                 # LDFLAGS, and LIBS before we added the
 793                                 # "--with-pcre=" directory, as we didn't
 794                                 # actually find pcre there.
 795                                 #
 796                                 CFLAGS="$wireshark_save_CFLAGS"
 797                                 CPPFLAGS="$wireshark_save_CPPFLAGS"
 798                                 LDFLAGS="$wireshark_save_LDFLAGS"
 799                                 LIBS="$wireshark_save_LIBS"
 800                                 PCRE_LIBS=""
 801                         fi
 802                         want_pcre=no
 803                 ])
 804                 AC_SUBST(PCRE_LIBS)
 805         fi
 806 ])
 807
 808 #
 809 # AC_WIRESHARK_LIBLUA_CHECK
 810 #
 811 AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
 812
 813         if test "x$lua_dir" != "x"
 814         then
 815                 #
 816                 # The user specified a directory in which liblua resides,
 817                 # so add the "include" subdirectory of that directory to
 818                 # the include file search path and the "lib" subdirectory
 819                 # of that directory to the library search path.
 820                 #
 821                 # XXX - if there's also a liblua in a directory that's
 822                 # already in CFLAGS, CPPFLAGS, or LDFLAGS, this won't
 823                 # make us find the version in the specified directory,
 824                 # as the compiler and/or linker will search that other
 825                 # directory before it searches the specified directory.
 826                 #
 827                 wireshark_save_CFLAGS="$CFLAGS"
 828                 CFLAGS="$CFLAGS -I$lua_dir/include"
 829                 wireshark_save_CPPFLAGS="$CPPFLAGS"
 830                 CPPFLAGS="$CPPFLAGS -I$lua_dir/include"
 831                 wireshark_save_LIBS="$LIBS"
 832                 LIBS="$LIBS -L$lua_dir/lib -llua -lm"
 833                 wireshark_save_LDFLAGS="$LDFLAGS"
 834                 LDFLAGS="$LDFLAGS -L$lua_dir/lib"
 835         else
 836                 #
 837                 # The user specified no directory in which liblua resides,
 838                 # so just add "-llua -lliblua" to the used libs.
 839                 #
 840                 wireshark_save_CFLAGS="$CFLAGS"
 841                 wireshark_save_CPPFLAGS="$CPPFLAGS"
 842                 wireshark_save_LDFLAGS="$LDFLAGS"
 843                 wireshark_save_LIBS="$LIBS"
 844                 LIBS="$LIBS -llua -lm"
 845         fi
 846
 847         #
 848         # Make sure we have "lua.h", "lualib.h" and "lauxlib.h".  If we don't, it means we probably
 849         # don't have liblua, so don't use it.
 850         #
 851         AC_CHECK_HEADERS(lua.h lualib.h lauxlib.h,,
 852         [
 853                 AC_CHECK_HEADERS(lua5.1/lua.h lua5.1/lualib.h lua5.1/lauxlib.h,
 854                 [
 855                         if test "x$lua_dir" != "x"
 856                         then
 857                                 LUA_INCLUDES="-I$lua_dir/include/lua5.1"
 858                         else
 859                                 # we found lua5.1/lua.h, but we don't know which include dir contains it
 860                                 AC_MSG_ERROR(Header file lua.h was found as lua5.1/lua.h but we can't use it. Please set the PATH for the --with-lua configure parameter. \n probably it is /usr.)
 861                         fi
 862
 863                 ],
 864                 [
 865                         if test "x$lua_dir" != "x"
 866                         then
 867                                 #
 868                                 # The user used "--with-lua=" to specify a directory
 869                                 # containing liblua, but we didn't find the header file
 870                                 # there; that either means they didn't specify the
 871                                 # right directory or are confused about whether liblua
 872                                 # is, in fact, installed.  Report the error and give up.
 873                                 #
 874                                 AC_MSG_ERROR([liblua header not found in directory specified in --with-lua])
 875                         else
 876                                 if test "x$want_lua" = "xyes"
 877                                 then
 878                                         #
 879                                         # The user tried to force us to use the library, but we
 880                                         # couldn't find the header file; report an error.
 881                                         #
 882                                         AC_MSG_ERROR(Header file lua.h not found.)
 883                                 else
 884                                         #
 885                                         # We couldn't find the header file; don't use the
 886                                         # library, as it's probably not present.
 887                                         #
 888                                         want_lua=no
 889                                 fi
 890                         fi
 891                 ])
 892         ])
 893
 894         if test "x$want_lua" != "xno"
 895         then
 896                 #
 897                 # Well, we at least have the lua header file.
 898                 #
 899                 # let's check if the libs are there
 900                 #
 901
 902                 # At least on Suse 9.3 systems, liblualib needs linking
 903                 # against libm.
 904                 LIBS="$LIBS $LUA_LIBS -lm"
 905
 906                 AC_CHECK_LIB(lua, luaL_register,
 907                 [
 908                     #
 909                     #  Lua 5.1 found
 910                     #
 911                         if test "x$lua_dir" != "x"
 912                         then
 913                                 #
 914                                 # Put the "-I" and "-L" flags for lua at
 915                                 # the beginning of CFLAGS, CPPFLAGS,
 916                                 # LDFLAGS, and LIBS.
 917                                 #
 918                                 LUA_LIBS="-L$lua_dir/lib -llua -lm"
 919                                 LUA_INCLUDES="-I$lua_dir/include"
 920                         else
 921                                 LUA_LIBS="-llua -lm"
 922                                 LUA_INCLUDES=""
 923                         fi
 924                         AC_DEFINE(HAVE_LUA_5_1, 1, [Define to use Lua 5.1])
 925
 926                 ],[
 927                         #
 928                         # We could not find the libs, maybe we have version number in the lib name
 929                         #
 930
 931                         LIBS="$wireshark_save_LIBS -llua5.1 -lm"
 932
 933                         AC_CHECK_LIB(lua5.1, luaL_register,
 934                         [
 935                             #
 936                             #  Lua 5.1 found
 937                             #
 938                             AC_DEFINE(HAVE_LUA_5_1, 1, [Define to use Lua 5.1])
 939                             LUA_LIBS=" -llua5.1 -lm"
 940                         ],[
 941                                 #
 942                                 # Restore the versions of CFLAGS, CPPFLAGS,
 943                                 # LDFLAGS, and LIBS before we added the
 944                                 # "--with-lua=" directory, as we didn't
 945                                 # actually find lua there.
 946                                 #
 947                                 CFLAGS="$wireshark_save_CFLAGS"
 948                                 CPPFLAGS="$wireshark_save_CPPFLAGS"
 949                                 LDFLAGS="$wireshark_save_LDFLAGS"
 950                                 LIBS="$wireshark_save_LIBS"
 951                                 LUA_LIBS=""
 952                                 # User requested --with-lua but it isn't available
 953                                 if test "x$want_lua" = "xyes"
 954                                 then
 955                                         AC_MSG_ERROR(Linking with liblua failed.)
 956                                 fi
 957                                 want_lua=no
 958                         ])
 959                 ])
 960
 961         CFLAGS="$wireshark_save_CFLAGS"
 962         CPPFLAGS="$wireshark_save_CPPFLAGS"
 963         LDFLAGS="$wireshark_save_LDFLAGS"
 964         LIBS="$wireshark_save_LIBS"
 965         AC_SUBST(LUA_LIBS)
 966         AC_SUBST(LUA_INCLUDES)
 967
 968         fi
 969 ])
 970
 971 #
 972 # AC_WIRESHARK_LIBPORTAUDIO_CHECK
 973 #
 974 AC_DEFUN([AC_WIRESHARK_LIBPORTAUDIO_CHECK],[
 975
 976         if test "x$portaudio_dir" != "x"
 977         then
 978                 #
 979                 # The user specified a directory in which libportaudio
 980                 # resides, so add the "include" subdirectory of that directory to
 981                 # the include file search path and the "lib" subdirectory
 982                 # of that directory to the library search path.
 983                 #
 984                 # XXX - if there's also a libportaudio in a directory that's
 985                 # already in CFLAGS, CPPFLAGS, or LDFLAGS, this won't
 986                 # make us find the version in the specified directory,
 987                 # as the compiler and/or linker will search that other
 988                 # directory before it searches the specified directory.
 989                 #
 990                 wireshark_save_CFLAGS="$CFLAGS"
 991                 CFLAGS="$CFLAGS -I$portaudio_dir/include"
 992                 wireshark_save_CPPFLAGS="$CPPFLAGS"
 993                 CPPFLAGS="$CPPFLAGS -I$portaudio_dir/include"
 994                 wireshark_save_LIBS="$LIBS"
 995                 LIBS="$LIBS -L$portaudio_dir/lib -lportaudio"
 996                 wireshark_save_LDFLAGS="$LDFLAGS"
 997                 LDFLAGS="$LDFLAGS -L$portaudio_dir/lib"
 998         else
 999                 #
1000                 # The user specified no directory in which libportaudio resides,
1001                 # so just add "-lportaudio" to the used libs.
1002                 #
1003                 wireshark_save_CFLAGS="$CFLAGS"
1004                 wireshark_save_CPPFLAGS="$CPPFLAGS"
1005                 wireshark_save_LDFLAGS="$LDFLAGS"
1006                 wireshark_save_LIBS="$LIBS"
1007                 LIBS="$LIBS -lportaudio"
1008         fi
1009
1010         #
1011         # Make sure we have "portaudio.h".  If we don't, it means we probably
1012         # don't have libportaudio, so don't use it.
1013         #
1014         AC_CHECK_HEADERS(portaudio.h,,
1015         [
1016                 if test "x$portaudio_dir" != "x"
1017                 then
1018                         #
1019                         # The user used "--with-portaudio=" to specify a directory
1020                         # containing libportaudio, but we didn't find the header file
1021                         # there; that either means they didn't specify the
1022                         # right directory or are confused about whether libportaudio
1023                         # is, in fact, installed.  Report the error and give up.
1024                         #
1025                         AC_MSG_ERROR([libportaudio header not found in directory specified in --with-portaudio])
1026                 else
1027                         CFLAGS="$wireshark_save_CFLAGS"
1028                         CPPFLAGS="$wireshark_save_CPPFLAGS"
1029                         LDFLAGS="$wireshark_save_LDFLAGS"
1030                         LIBS="$wireshark_save_LIBS"
1031                         PORTAUDIO_LIBS=""
1032                         if test "x$want_portaudio" = "xyes"
1033                         then
1034                                 #
1035                                 # The user tried to force us to use the library, but we
1036                                 # couldn't find the header file; report an error.
1037                                 #
1038                                 AC_MSG_ERROR(Header file portaudio.h not found.)
1039                         else
1040                                 #
1041                                 # We couldn't find the header file; don't use the
1042                                 # library, as it's probably not present.
1043                                 #
1044                                 want_portaudio=no
1045                         fi
1046                 fi
1047         ])
1048
1049         #
1050         # Check whether we have the right version of portaudio
1051         #
1052         if test "x$want_portaudio" != "xno"
1053         then
1054                 AC_CHECK_TYPE(PortAudioStream,
1055                 AC_DEFINE(PORTAUDIO_API_1, 1, [Define if we are using version of of the Portaudio library API]),
1056                 ,
1057                 [#include <portaudio.h>])
1058         fi
1059
1060         if test "x$want_portaudio" != "xno"
1061         then
1062                 #
1063                 # Well, we at least have the portaudio header file.
1064                 #
1065                 # let's check if the libs are there
1066                 #
1067
1068                 AC_CHECK_LIB(portaudio, Pa_Initialize,
1069                 [
1070                         if test "x$portaudio_dir" != "x"
1071                         then
1072                                 #
1073                                 # Put the "-I" and "-L" flags for portaudio at
1074                                 # the beginning of CFLAGS, CPPFLAGS,
1075                                 # LDFLAGS, and LIBS.
1076                                 #
1077                                 PORTAUDIO_LIBS="-L$portaudio_dir/lib -lportaudio"
1078                                 PORTAUDIO_INCLUDES="-I$portaudio_dir/include"
1079                         else
1080                                 PORTAUDIO_LIBS="-lportaudio"
1081                                 PORTAUDIO_INCLUDES=""
1082                         fi
1083                         AC_DEFINE(HAVE_LIBPORTAUDIO, 1, [Define to use libportaudio library])
1084                         want_portaudio=yes
1085                 ],[
1086                         #
1087                         # Restore the versions of CFLAGS, CPPFLAGS,
1088                         # LDFLAGS, and LIBS before we added the
1089                         # "--with-portaudio=" directory, as we didn't
1090                         # actually find portaudio there.
1091                         #
1092                         CFLAGS="$wireshark_save_CFLAGS"
1093                         CPPFLAGS="$wireshark_save_CPPFLAGS"
1094                         LDFLAGS="$wireshark_save_LDFLAGS"
1095                         LIBS="$wireshark_save_LIBS"
1096                         PORTAUDIO_LIBS=""
1097                         # User requested --with-portaudio but it isn't available
1098                         if test "x$want_portaudio" = "xyes"
1099                         then
1100                                 AC_MSG_ERROR(Linking with libportaudio failed.)
1101                         fi
1102                         want_portaudio=no
1103                 ])
1104
1105         CFLAGS="$wireshark_save_CFLAGS"
1106         CPPFLAGS="$wireshark_save_CPPFLAGS"
1107         LDFLAGS="$wireshark_save_LDFLAGS"
1108         LIBS="$wireshark_save_LIBS"
1109         AC_SUBST(PORTAUDIO_LIBS)
1110         AC_SUBST(PORTAUDIO_INCLUDES)
1111
1112         fi
1113 ])
1114
1115 #
1116 # AC_WIRESHARK_RPM_CHECK
1117 # Looks for the rpm program, and checks to see if we can redefine "_topdir".
1118 #
1119 AC_DEFUN([AC_WIRESHARK_RPM_CHECK],
1120 [
1121         AC_CHECK_PROG(ac_cv_wireshark_have_rpm, rpm, "yes", "no")
1122         if test "x$ac_cv_wireshark_have_rpm" = "xyes"; then
1123                 rpm --define '_topdir /tmp' > /dev/null 2>&1
1124                 AC_MSG_CHECKING(to see if we can redefine _topdir)
1125                 if test $? -eq 0 ; then
1126                         AC_MSG_RESULT(yes)
1127                         HAVE_RPM=yes
1128                 else
1129                         AC_MSG_RESULT(no.  You'll have to build packages manually.)
1130                         HAVE_RPM=no
1131                 fi
1132         fi
1133 ])
1134
1135 #
1136 # AC_WIRESHARK_GNU_SED_CHECK
1137 # Checks if GNU sed is the first sed in PATH.
1138 #
1139 AC_DEFUN([AC_WIRESHARK_GNU_SED_CHECK],
1140 [
1141         AC_MSG_CHECKING(for GNU sed as first sed in PATH)
1142         if  ( sh -c "sed --version" </dev/null 2> /dev/null | grep "GNU sed" 2>&1 > /dev/null ) ;  then
1143                 AC_MSG_RESULT(yes)
1144                 HAVE_GNU_SED=yes
1145         else
1146                 AC_MSG_RESULT(no)
1147                 HAVE_GNU_SED=no
1148         fi
1149 ])
1150
1151 #
1152 # AC_WIRESHARK_C_ARES_CHECK
1153 #
1154 AC_DEFUN([AC_WIRESHARK_C_ARES_CHECK],
1155 [
1156         want_c_ares=defaultyes
1157
1158         if test "x$want_c_ares" = "xdefaultyes"; then
1159                 want_c_ares=yes
1160                 if test "x$ac_cv_enable_usr_local" = "xyes" ; then
1161                         withval=/usr/local
1162                         if test -d "$withval"; then
1163                                 AC_WIRESHARK_ADD_DASH_L(LDFLAGS, ${withval}/lib)
1164                         fi
1165                 fi
1166         fi
1167
1168         if test "x$want_c_ares" = "xyes"; then
1169                 AC_CHECK_LIB(cares, ares_init,
1170                   [
1171                     C_ARES_LIBS=-lcares
1172                 AC_DEFINE(HAVE_C_ARES, 1, [Define to use c-ares library])
1173                 have_good_c_ares=yes
1174                   ],, $SOCKET_LIBS $NSL_LIBS
1175                 )
1176         else
1177                 AC_MSG_RESULT(not required)
1178         fi
1179 ])
1180
1181
1182 #
1183 # AC_WIRESHARK_ADNS_CHECK
1184 #
1185 AC_DEFUN([AC_WIRESHARK_ADNS_CHECK],
1186 [
1187         want_adns=defaultyes
1188
1189         if test "x$want_adns" = "xdefaultyes"; then
1190                 want_adns=yes
1191                 if test "x$ac_cv_enable_usr_local" = "xyes" ; then
1192                         withval=/usr/local
1193                         if test -d "$withval"; then
1194                                 AC_WIRESHARK_ADD_DASH_L(LDFLAGS, ${withval}/lib)
1195                         fi
1196                 fi
1197         fi
1198
1199         if test "x$want_adns" = "xyes"; then
1200                 AC_CHECK_LIB(adns, adns_init,
1201                   [
1202                     ADNS_LIBS=-ladns
1203                 AC_DEFINE(HAVE_GNU_ADNS, 1, [Define to use GNU ADNS library])
1204                 have_good_adns=yes
1205                   ],, $SOCKET_LIBS $NSL_LIBS
1206                 )
1207         else
1208                 AC_MSG_RESULT(not required)
1209         fi
1210 ])
1211
1212
1213 #
1214 # AC_WIRESHARK_LIBCAP_CHECK
1215 #
1216 AC_DEFUN([AC_WIRESHARK_LIBCAP_CHECK],
1217 [
1218         want_libcap=defaultyes
1219
1220         if test "x$want_libcap" = "xdefaultyes"; then
1221                 want_libcap=yes
1222                 if test "x$ac_cv_enable_usr_local" = "xyes" ; then
1223                         withval=/usr/local
1224                         if test -d "$withval"; then
1225                                 AC_WIRESHARK_ADD_DASH_L(LDFLAGS, ${withval}/lib)
1226                         fi
1227                 fi
1228         fi
1229
1230         if test "x$want_libcap" = "xyes"; then
1231                 AC_CHECK_LIB(cap, cap_set_flag,
1232                   [
1233                     LIBCAP_LIBS=-lcap
1234                 AC_DEFINE(HAVE_LIBCAP, 1, [Define to use the libcap library])
1235                 have_good_libcap=yes
1236                   ],,
1237                 )
1238         else
1239                 AC_MSG_RESULT(not required)
1240         fi
1241 ])
1242
1243
1244 #
1245 # AC_WIRESHARK_KRB5_CHECK
1246 #
1247 AC_DEFUN([AC_WIRESHARK_KRB5_CHECK],
1248 [
1249         wireshark_save_CFLAGS="$CFLAGS"
1250         wireshark_save_CPPFLAGS="$CPPFLAGS"
1251         if test "x$krb5_dir" != "x"
1252         then
1253           #
1254           # The user specified a directory in which kerberos resides,
1255           # so add the "include" subdirectory of that directory to
1256           # the include file search path and the "lib" subdirectory
1257           # of that directory to the library search path.
1258           #
1259           # XXX - if there's also a kerberos in a directory that's
1260           # already in CFLAGS, CPPFLAGS, or LDFLAGS, this won't
1261           # make us find the version in the specified directory,
1262           # as the compiler and/or linker will search that other
1263           # directory before it searches the specified directory.
1264           #
1265           CFLAGS="$CFLAGS -I$krb5_dir/include"
1266           CPPFLAGS="$CPPFLAGS -I$krb5_dir/include"
1267           ac_heimdal_version=`grep heimdal $krb5_dir/include/krb5.h | head -n 1 | sed 's/^.*heimdal.*$/HEIMDAL/'`
1268           ac_mit_version=`grep 'Massachusetts Institute of Technology' $krb5_dir/include/krb5.h | head -n 1 | sed 's/^.*Massachusetts Institute of Technology.*$/MIT/'`
1269           ac_krb5_version="$ac_heimdal_version$ac_mit_version"
1270           if test "x$ac_krb5_version" = "xHEIMDAL"
1271               KRB5_LIBS="-L$krb5_dir/lib -lkrb5 -lasn1 $SSL_LIBS -lroken -lcrypt"
1272           then
1273               KRB5_LIBS="-L$krb5_dir/lib -lkrb5 -lk5crypto -lcom_err"
1274           fi
1275           if test "x$ac_krb5_version" = "xMIT"
1276           then
1277             AC_DEFINE(HAVE_MIT_KERBEROS, 1, [Define to use MIT kerberos])
1278           fi
1279         else
1280           AC_PATH_PROG(KRB5_CONFIG, krb5-config)
1281           if test -x "$KRB5_CONFIG"
1282           then
1283             KRB5_FLAGS=`"$KRB5_CONFIG" --cflags`
1284             KRB5_LIBS=`"$KRB5_CONFIG" --libs`
1285             CFLAGS="$CFLAGS $KRB5_FLAGS"
1286             CPPFLAGS="$CPPFLAGS $KRB5_FLAGS"
1287             #
1288             # If -lcrypto is in KRB5_FLAGS, we require it to build
1289             # with Heimdal/MIT.  We don't want to built with it by
1290             # default, due to annoying license incompatibilities
1291             # between the OpenSSL license and the GPL, so:
1292             #
1293             #   if SSL_LIBS is set to a non-empty string, we
1294             #   remove -lcrypto from KRB5_LIBS and replace
1295             #   it with SSL_LIBS;
1296             #
1297             #   if SSL_LIBS is not set to a non-empty string
1298             #   we fail with an appropriate error message.
1299             #
1300             case "$KRB5_LIBS" in
1301             *-lcrypto*)
1302                 if test ! -z "$SSL_LIBS"
1303                 then
1304                     KRB5_LIBS=`echo $KRB5_LIBS | sed 's/-lcrypto//'`
1305                     KRB5_LIBS="$KRB5_LIBS $SSL_LIBS"
1306                 else
1307                     AC_MSG_ERROR([Kerberos library requires -lcrypto but --with-ssl not specified])
1308                 fi
1309                 ;;
1310             esac
1311             ac_krb5_version=`"$KRB5_CONFIG" --version | head -n 1 | sed -e 's/^.*heimdal.*$/HEIMDAL/' -e 's/^Kerberos .*$/MIT/'`
1312           fi
1313         fi
1314
1315         #
1316         # Make sure we have "krb5.h".  If we don't, it means we probably
1317         # don't have kerberos, so don't use it.
1318         #
1319         AC_CHECK_HEADER(krb5.h,,
1320           [
1321             if test "x$krb5_dir" != "x"
1322             then
1323               #
1324               # The user used "--with-krb5=" to specify a directory
1325               # containing kerberos, but we didn't find the header file
1326               # there; that either means they didn't specify the
1327               # right directory or are confused about whether kerberos
1328               # is, in fact, installed.  Report the error and give up.
1329               #
1330               AC_MSG_ERROR([kerberos header not found in directory specified in --with-krb5])
1331             else
1332               if test "x$want_krb5" = "xyes"
1333               then
1334                 #
1335                 # The user tried to force us to use the library, but we
1336                 # couldn't find the header file; report an error.
1337                 #
1338                 AC_MSG_ERROR(Header file krb5.h not found.)
1339               else
1340                 #
1341                 # We couldn't find the header file; don't use the
1342                 # library, as it's probably not present.
1343                 #
1344                 want_krb5=no
1345                 AC_MSG_RESULT(No Heimdal or MIT header found - disabling dissection for some kerberos data in packet decoding)
1346               fi
1347             fi
1348           ])
1349
1350         if test "x$want_krb5" != "xno"
1351         then
1352             #
1353             # Well, we at least have the krb5 header file.
1354             # Check whether this is Heimdal or MIT.
1355             #
1356             AC_MSG_CHECKING(whether the Kerberos library is Heimdal or MIT)
1357             if test "x$ac_krb5_version" = "xHEIMDAL" -o "x$ac_krb5_version" = "xMIT"
1358             then
1359                 #
1360                 # Yes.
1361                 # Check whether we have krb5_kt_resolve - and whether
1362                 # we need to link with -lresolv when linking with
1363                 # the Kerberos library.
1364                 #
1365                 AC_MSG_RESULT($ac_krb5_version)
1366                 wireshark_save_LIBS="$LIBS"
1367                 found_krb5_kt_resolve=no
1368                 for extras in "" "-lresolv"
1369                 do
1370                     LIBS="$KRB5_LIBS $extras"
1371                     if test -z "$extras"
1372                     then
1373                         AC_MSG_CHECKING([whether $ac_krb5_version includes krb5_kt_resolve])
1374                     else
1375                         AC_MSG_CHECKING([whether $ac_krb5_version includes krb5_kt_resolve (linking with $extras)])
1376                     fi
1377                     AC_TRY_LINK(
1378                         [
1379                         ],
1380                         [
1381                             krb5_kt_resolve();
1382                         ],
1383                         [
1384                             #
1385                             # We found "krb5_kt_resolve()", and required
1386                             # the libraries in extras as well.
1387                             #
1388                             AC_MSG_RESULT(yes)
1389                             KRB5_LIBS="$LIBS"
1390                             AC_DEFINE(HAVE_KERBEROS, 1, [Define to use kerberos])
1391                             if test "x$ac_krb5_version" = "xHEIMDAL"
1392                             then
1393                                 AC_DEFINE(HAVE_HEIMDAL_KERBEROS, 1, [Define to use heimdal kerberos])
1394                             elif test "x$ac_krb5_version" = "xMIT"
1395                             then
1396                                 AC_DEFINE(HAVE_MIT_KERBEROS, 1, [Define to use MIT kerberos])
1397                             fi
1398                             found_krb5_kt_resolve=yes
1399                             break
1400                         ],
1401                         [
1402                             AC_MSG_RESULT(no)
1403                         ])
1404                 done
1405                 if test "$found_krb5_kt_resolve" = no
1406                 then
1407                     #
1408                     # We didn't find "krb5_kt_resolve()" in the
1409                     # Kerberos library, even when we tried linking
1410                     # with -lresolv; we can't link with kerberos.
1411                     #
1412                     if test "x$want_krb5" = "xyes"
1413                     then
1414                         #
1415                         # The user tried to force us to use the library,
1416                         # but we can't do so; report an error.
1417                         #
1418                         AC_MSG_ERROR(Usable $ac_krb5_version not found)
1419                     else
1420                         #
1421                         # Restore the versions of CFLAGS and CPPFLAGS
1422                         # from before we added the flags for Kerberos.
1423                         #
1424                         AC_MSG_RESULT(Usable $ac_krb5_version not found - disabling dissection for some kerberos data in packet decoding)
1425                         CFLAGS="$wireshark_save_CFLAGS"
1426                         CPPFLAGS="$wireshark_save_CPPFLAGS"
1427                         KRB5_LIBS=""
1428                         want_krb5=no
1429                     fi
1430                 else
1431                     #
1432                     # We can link with Kerberos; see whether krb5.h
1433                     # defines KEYTYPE_ARCFOUR_56 (where "defines" means
1434                     # "as a #define or as an enum member).
1435                     #
1436                     AC_MSG_CHECKING([whether krb5.h defines KEYTYPE_ARCFOUR_56])
1437                     AC_COMPILE_IFELSE(
1438                       [
1439                         AC_LANG_SOURCE(
1440                           [[
1441                             #include <krb5.h>
1442                             #include <stdio.h>
1443
1444                             main()
1445                             {
1446                               printf("%u\n", KEYTYPE_ARCFOUR_56);
1447                             }
1448                           ]])
1449                       ],
1450                       [
1451                         AC_MSG_RESULT(yes)
1452                         AC_DEFINE(HAVE_KEYTYPE_ARCFOUR_56, 1, [Define if krb5.h defines KEYTYPE_ARCFOUR_56])
1453                       ],
1454                       [
1455                         AC_MSG_RESULT(no)
1456                       ])
1457                 fi
1458                 LIBS="$wireshark_save_LIBS"
1459             else
1460                 #
1461                 # It's not Heimdal or MIT.
1462                 #
1463                 AC_MSG_RESULT(no)
1464                 if test "x$want_krb5" = "xyes"
1465                 then
1466                     #
1467                     # The user tried to force us to use the library,
1468                     # but we can't do so; report an error.
1469                     #
1470                     AC_MSG_ERROR(Kerberos not found)
1471                 else
1472                     #
1473                     # Restore the versions of CFLAGS and CPPFLAGS
1474                     # from before we added the flags for Kerberos.
1475                     #
1476                     AC_MSG_RESULT(Kerberos not found - disabling dissection for some kerberos data in packet decoding)
1477                     CFLAGS="$wireshark_save_CFLAGS"
1478                     CPPFLAGS="$wireshark_save_CPPFLAGS"
1479                     KRB5_LIBS=""
1480                     want_krb5=no
1481                 fi
1482             fi
1483         else
1484             #
1485             # The user asked us not to use Kerberos, or they didn't
1486             # say whether they wanted us to use it but we found
1487             # that we couldn't.
1488             #
1489             # Restore the versions of CFLAGS and CPPFLAGS
1490             # from before we added the flags for Kerberos.
1491             #
1492             CFLAGS="$wireshark_save_CFLAGS"
1493             CPPFLAGS="$wireshark_save_CPPFLAGS"
1494             KRB5_LIBS=""
1495             want_krb5=no
1496         fi
1497         AC_SUBST(KRB5_LIBS)
1498 ])
1499
1500 #
1501 # AC_WIRESHARK_GEOIP_CHECK
1502 #
1503 AC_DEFUN([AC_WIRESHARK_GEOIP_CHECK],
1504 [
1505         want_geoip=defaultyes
1506
1507         if test "x$want_geoip" = "xdefaultyes"; then
1508                 want_geoip=yes
1509                 if test "x$ac_cv_enable_usr_local" = "xyes" ; then
1510                         withval=/usr/local
1511                         if test -d "$withval"; then
1512                                 AC_WIRESHARK_ADD_DASH_L(LDFLAGS, ${withval}/lib)
1513                         fi
1514                 fi
1515         fi
1516
1517         if test "x$want_geoip" = "xyes"; then
1518                 AC_CHECK_LIB(GeoIP, GeoIP_new,
1519                   [
1520                     GEOIP_LIBS=-lGeoIP
1521                 AC_DEFINE(HAVE_GEOIP, 1, [Define to use GeoIP library])
1522                 have_good_geoip=yes
1523                   ],,
1524                 )
1525         else
1526                 AC_MSG_RESULT(not required)
1527         fi
1528 ])
1529
1530 #
1531 # AC_WIRESHARK_GCC_CFLAGS_CHECK
1532 #
1533 # $1 : cflags to test
1534 #
1535 # The macro first determines if the compiler is GCC. Then compile with the
1536 # defined cflags. The defined flags are added to CFLAGS only if the compilation
1537 # succeeds.
1538 #
1539 AC_DEFUN([AC_WIRESHARK_GCC_CFLAGS_CHECK],
1540 [GCC_OPTION="$1"
1541 AC_MSG_CHECKING(whether we can add $GCC_OPTION to CFLAGS)
1542 if test "x$GCC" != "x"; then
1543   CFLAGS_saved="$CFLAGS"
1544   CFLAGS="$CFLAGS $GCC_OPTION"
1545   AC_COMPILE_IFELSE([
1546     AC_LANG_SOURCE([[
1547                       int foo;
1548                   ]])],
1549                   [
1550                     AC_MSG_RESULT(yes)
1551                   ],
1552                   [
1553                     AC_MSG_RESULT(no)
1554                     CFLAGS="$CFLAGS_saved"
1555                   ])
1556 else
1557   AC_MSG_RESULT(no)
1558 fi
1559 ])
1560
1561 #
1562 # AC_WIRESHARK_IGE_MAC_INTEGRATION_CHECK
1563 #
1564 # Checks for the presence of OS X integration functions in the GTK+ framework
1565 # or as a separate library.
1566 #
1567 # http://developer.imendio.com/projects/gtk-macosx/integration
1568 #
1569 AC_DEFUN([AC_WIRESHARK_IGE_MAC_INTEGRATION_CHECK],
1570 [
1571         ac_save_CFLAGS="$CFLAGS"
1572         ac_save_LIBS="$LIBS"
1573         CFLAGS="$CFLAGS $GTK_CFLAGS"
1574         LIBS="$GTK_LIBS $LIBS"
1575         AC_SEARCH_LIBS(ige_mac_menu_set_menu_bar, Gtk,
1576         [
1577                 AC_DEFINE(HAVE_IGE_MAC_INTEGRATION, 1,
1578                         [Define to 1 if the the Gtk+ framework or a separate library inclues the Imendio IGE Mac OS X Integration functions.])
1579                 # We don't want gtk stuff in LIBS (which is reset below) so
1580                 # manually set GTK_LIBS (which is more appropriate)
1581                 GTK_LIBS="$GTK_LIBS -lGtk"
1582         ]
1583         [
1584                 AC_SEARCH_LIBS(ige_mac_menu_set_menu_bar, igemacintegration,
1585                 [
1586                         AC_DEFINE(HAVE_IGE_MAC_INTEGRATION, 1,
1587                                 [Define to 1 if the the Gtk+ framework or a separate library inclues the Imendio IGE Mac OS X Integration functions.])
1588                         # We don't want gtk stuff in LIBS (which is reset below) so
1589                         # manually set GTK_LIBS (which is more appropriate)
1590                         GTK_LIBS="$GTK_LIBS -ligemacintegration"
1591                 ])
1592         ])
1593         CFLAGS="$ac_save_CFLAGS"
1594         LIBS="$ac_save_LIBS"
1595 ])
1596
1597