The Tcpdump Group git mirrors - libpcap/blob - aclocal.m4

   1 dnl @(#) $Header: /tcpdump/master/libpcap/aclocal.m4,v 1.93 2008-11-18 07:29:48 guy Exp $ (LBL)
   2 dnl
   3 dnl Copyright (c) 1995, 1996, 1997, 1998
   4 dnl     The Regents of the University of California.  All rights reserved.
   5 dnl
   6 dnl Redistribution and use in source and binary forms, with or without
   7 dnl modification, are permitted provided that: (1) source code distributions
   8 dnl retain the above copyright notice and this paragraph in its entirety, (2)
   9 dnl distributions including binary code include the above copyright notice and
  10 dnl this paragraph in its entirety in the documentation or other materials
  11 dnl provided with the distribution, and (3) all advertising materials mentioning
  12 dnl features or use of this software display the following acknowledgement:
  13 dnl ``This product includes software developed by the University of California,
  14 dnl Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  15 dnl the University nor the names of its contributors may be used to endorse
  16 dnl or promote products derived from this software without specific prior
  17 dnl written permission.
  18 dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  19 dnl WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  20 dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  21 dnl
  22 dnl LBL autoconf macros
  23 dnl
  24
  25 dnl
  26 dnl Do whatever AC_LBL_C_INIT work is necessary before using AC_PROG_CC.
  27 dnl
  28 dnl It appears that newer versions of autoconf (2.64 and later) will,
  29 dnl if you use AC_TRY_COMPILE in a macro, stick AC_PROG_CC at the
  30 dnl beginning of the macro, even if the macro itself calls AC_PROG_CC.
  31 dnl See the "Prerequisite Macros" and "Expanded Before Required" sections
  32 dnl in the Autoconf documentation.
  33 dnl
  34 dnl This causes a steaming heap of fail in our case, as we were, in
  35 dnl AC_LBL_C_INIT, doing the tests we now do in AC_LBL_C_INIT_BEFORE_CC,
  36 dnl calling AC_PROG_CC, and then doing the tests we now do in
  37 dnl AC_LBL_C_INIT.  Now, we run AC_LBL_C_INIT_BEFORE_CC, AC_PROG_CC,
  38 dnl and AC_LBL_C_INIT at the top level.
  39 dnl
  40 AC_DEFUN(AC_LBL_C_INIT_BEFORE_CC,
  41     [AC_PREREQ(2.50)
  42     AC_BEFORE([$0], [AC_LBL_C_INIT])
  43     AC_BEFORE([$0], [AC_PROG_CC])
  44     AC_BEFORE([$0], [AC_LBL_FIXINCLUDES])
  45     AC_BEFORE([$0], [AC_LBL_DEVEL])
  46     AC_ARG_WITH(gcc, [  --without-gcc           don't use gcc])
  47     $1="-O"
  48     $2=""
  49     if test "${srcdir}" != "." ; then
  50             $2="-I\$(srcdir)"
  51     fi
  52     if test "${CFLAGS+set}" = set; then
  53             LBL_CFLAGS="$CFLAGS"
  54     fi
  55     if test -z "$CC" ; then
  56             case "$host_os" in
  57
  58             bsdi*)
  59                     AC_CHECK_PROG(SHLICC2, shlicc2, yes, no)
  60                     if test $SHLICC2 = yes ; then
  61                             CC=shlicc2
  62                             export CC
  63                     fi
  64                     ;;
  65             esac
  66     fi
  67     if test -z "$CC" -a "$with_gcc" = no ; then
  68             CC=cc
  69             export CC
  70     fi
  71 ])
  72
  73 dnl
  74 dnl Determine which compiler we're using (cc or gcc)
  75 dnl If using gcc, determine the version number
  76 dnl If using cc, require that it support ansi prototypes
  77 dnl If using gcc, use -O2 (otherwise use -O)
  78 dnl If using cc, explicitly specify /usr/local/include
  79 dnl
  80 dnl usage:
  81 dnl
  82 dnl     AC_LBL_C_INIT(copt, incls)
  83 dnl
  84 dnl results:
  85 dnl
  86 dnl     $1 (copt set)
  87 dnl     $2 (incls set)
  88 dnl     CC
  89 dnl     LDFLAGS
  90 dnl     ac_cv_lbl_gcc_vers
  91 dnl     LBL_CFLAGS
  92 dnl
  93 AC_DEFUN(AC_LBL_C_INIT,
  94     [AC_PREREQ(2.50)
  95     AC_BEFORE([$0], [AC_LBL_FIXINCLUDES])
  96     AC_BEFORE([$0], [AC_LBL_DEVEL])
  97     AC_BEFORE([$0], [AC_LBL_SHLIBS_INIT])
  98     if test "$GCC" = yes ; then
  99             if test "$SHLICC2" = yes ; then
 100                     ac_cv_lbl_gcc_vers=2
 101                     $1="-O2"
 102             else
 103                     AC_MSG_CHECKING(gcc version)
 104                     AC_CACHE_VAL(ac_cv_lbl_gcc_vers,
 105                         ac_cv_lbl_gcc_vers=`$CC -v 2>&1 | \
 106                             sed -e '/^gcc version /!d' \
 107                                 -e 's/^gcc version //' \
 108                                 -e 's/ .*//' -e 's/^[[[^0-9]]]*//' \
 109                                 -e 's/\..*//'`)
 110                     AC_MSG_RESULT($ac_cv_lbl_gcc_vers)
 111                     if test $ac_cv_lbl_gcc_vers -gt 1 ; then
 112                             $1="-O2"
 113                     fi
 114             fi
 115     else
 116             AC_MSG_CHECKING(that $CC handles ansi prototypes)
 117             AC_CACHE_VAL(ac_cv_lbl_cc_ansi_prototypes,
 118                 AC_TRY_COMPILE(
 119                     [#include <sys/types.h>],
 120                     [int frob(int, char *)],
 121                     ac_cv_lbl_cc_ansi_prototypes=yes,
 122                     ac_cv_lbl_cc_ansi_prototypes=no))
 123             AC_MSG_RESULT($ac_cv_lbl_cc_ansi_prototypes)
 124             if test $ac_cv_lbl_cc_ansi_prototypes = no ; then
 125                     case "$host_os" in
 126
 127                     hpux*)
 128                             AC_MSG_CHECKING(for HP-UX ansi compiler ($CC -Aa -D_HPUX_SOURCE))
 129                             savedcflags="$CFLAGS"
 130                             CFLAGS="-Aa -D_HPUX_SOURCE $CFLAGS"
 131                             AC_CACHE_VAL(ac_cv_lbl_cc_hpux_cc_aa,
 132                                 AC_TRY_COMPILE(
 133                                     [#include <sys/types.h>],
 134                                     [int frob(int, char *)],
 135                                     ac_cv_lbl_cc_hpux_cc_aa=yes,
 136                                     ac_cv_lbl_cc_hpux_cc_aa=no))
 137                             AC_MSG_RESULT($ac_cv_lbl_cc_hpux_cc_aa)
 138                             if test $ac_cv_lbl_cc_hpux_cc_aa = no ; then
 139                                     AC_MSG_ERROR(see the INSTALL doc for more info)
 140                             fi
 141                             CFLAGS="$savedcflags"
 142                             $1="-Aa $$1"
 143                             AC_DEFINE(_HPUX_SOURCE,1,[needed on HP-UX])
 144                             ;;
 145
 146                     osf*)
 147                             AC_MSG_CHECKING(for ansi mode in DEC compiler ($CC -std1))
 148                             savedcflags="$CFLAGS"
 149                             CFLAGS="-std1"
 150                             AC_CACHE_VAL(ac_cv_lbl_cc_osf1_cc_std1,
 151                                 AC_TRY_COMPILE(
 152                                     [#include <sys/types.h>],
 153                                     [int frob(int, char *)],
 154                                     ac_cv_lbl_cc_osf1_cc_std1=yes,
 155                                     ac_cv_lbl_cc_osf1_cc_std1=no))
 156                             AC_MSG_RESULT($ac_cv_lbl_cc_osf1_cc_std1)
 157                             if test $ac_cv_lbl_cc_osf1_cc_std1 = no ; then
 158                                     AC_MSG_ERROR(see the INSTALL doc for more info)
 159                             fi
 160                             CFLAGS="$savedcflags"
 161                             $1="-std1 $$1"
 162                             ;;
 163
 164                     *)
 165                             AC_MSG_ERROR(see the INSTALL doc for more info)
 166                             ;;
 167                     esac
 168             fi
 169             $2="$$2 -I/usr/local/include"
 170             LDFLAGS="$LDFLAGS -L/usr/local/lib"
 171
 172             case "$host_os" in
 173
 174             irix*)
 175                     $1="$$1 -xansi -signed -g3"
 176                     ;;
 177
 178             osf*)
 179                     #
 180                     # Presumed to be DEC OSF/1, Digital UNIX, or
 181                     # Tru64 UNIX.
 182                     #
 183                     $1="$$1 -g3"
 184                     ;;
 185
 186             ultrix*)
 187                     AC_MSG_CHECKING(that Ultrix $CC hacks const in prototypes)
 188                     AC_CACHE_VAL(ac_cv_lbl_cc_const_proto,
 189                         AC_TRY_COMPILE(
 190                             [#include <sys/types.h>],
 191                             [struct a { int b; };
 192                             void c(const struct a *)],
 193                             ac_cv_lbl_cc_const_proto=yes,
 194                             ac_cv_lbl_cc_const_proto=no))
 195                     AC_MSG_RESULT($ac_cv_lbl_cc_const_proto)
 196                     if test $ac_cv_lbl_cc_const_proto = no ; then
 197                             AC_DEFINE(const,[],
 198                                 [to handle Ultrix compilers that don't support const in prototypes])
 199                     fi
 200                     ;;
 201             esac
 202     fi
 203 ])
 204
 205 dnl
 206 dnl Determine what options are needed to build a shared library
 207 dnl
 208 dnl usage:
 209 dnl
 210 dnl     AC_LBL_SHLIBS_INIT
 211 dnl
 212 dnl results:
 213 dnl
 214 dnl     V_CCOPT (modified to build position-independent code)
 215 dnl     V_SHLIB_CMD
 216 dnl     V_SHLIB_OPT
 217 dnl     V_SONAME_OPT
 218 dnl     V_RPATH_OPT
 219 dnl
 220 AC_DEFUN(AC_LBL_SHLIBS_INIT,
 221     [AC_PREREQ(2.50)
 222     if test "$GCC" = yes ; then
 223             #
 224             # On platforms where we build a shared library:
 225             #
 226             #   add options to generate position-independent code,
 227             #   if necessary (it's the default in AIX and Darwin/OS X);
 228             #
 229             #   define option to set the soname of the shared library,
 230             #   if the OS supports that;
 231             #
 232             #   add options to specify, at link time, a directory to
 233             #   add to the run-time search path, if that's necessary.
 234             #
 235             V_SHLIB_CMD="\$(CC)"
 236             V_SHLIB_OPT="-shared"
 237             case "$host_os" in
 238
 239             aix*)
 240                     ;;
 241
 242             freebsd*|netbsd*|openbsd*|dragonfly*|linux*|osf*)
 243                     #
 244                     # Platforms where the linker is the GNU linker
 245                     # or accepts command-line arguments like
 246                     # those the GNU linker accepts.
 247                     #
 248                     V_CCOPT="$V_CCOPT -fpic"
 249                     V_SONAME_OPT="-Wl,-soname,"
 250                     V_RPATH_OPT="-Wl,-rpath,"
 251                     ;;
 252
 253             hpux*)
 254                     V_CCOPT="$V_CCOPT -fpic"
 255                     #
 256                     # XXX - this assumes GCC is using the HP linker,
 257                     # rather than the GNU linker, and that the "+h"
 258                     # option is used on all HP-UX platforms, both .sl
 259                     # and .so.
 260                     #
 261                     V_SONAME_OPT="-Wl,+h,"
 262                     #
 263                     # By default, directories specifed with -L
 264                     # are added to the run-time search path, so
 265                     # we don't add them in pcap-config.
 266                     #
 267                     ;;
 268
 269             solaris*)
 270                     V_CCOPT="$V_CCOPT -fpic"
 271                     #
 272                     # XXX - this assumes GCC is using the Sun linker,
 273                     # rather than the GNU linker.
 274                     #
 275                     V_SONAME_OPT="-Wl,-h,"
 276                     V_RPATH_OPT="-Wl,-R,"
 277                     ;;
 278             esac
 279     else
 280             #
 281             # Set the appropriate compiler flags and, on platforms
 282             # where we build a shared library:
 283             #
 284             #   add options to generate position-independent code,
 285             #   if necessary (it's the default in Darwin/OS X);
 286             #
 287             #   if we generate ".so" shared libraries, define the
 288             #   appropriate options for building the shared library;
 289             #
 290             #   add options to specify, at link time, a directory to
 291             #   add to the run-time search path, if that's necessary.
 292             #
 293             # Note: spaces after V_SONAME_OPT are significant; on
 294             # some platforms the soname is passed with a GCC-like
 295             # "-Wl,-soname,{soname}" option, with the soname part
 296             # of the option, while on other platforms the C compiler
 297             # driver takes it as a regular option with the soname
 298             # following the option.  The same applies to V_RPATH_OPT.
 299             #
 300             case "$host_os" in
 301
 302             aix*)
 303                     V_SHLIB_CMD="\$(CC)"
 304                     V_SHLIB_OPT="-G -bnoentry -bexpall"
 305                     ;;
 306
 307             freebsd*|netbsd*|openbsd*|dragonfly*|linux*)
 308                     #
 309                     # "cc" is GCC.
 310                     #
 311                     V_CCOPT="$V_CCOPT -fpic"
 312                     V_SHLIB_CMD="\$(CC)"
 313                     V_SHLIB_OPT="-shared"
 314                     V_SONAME_OPT="-Wl,-soname,"
 315                     V_RPATH_OPT="-Wl,-rpath,"
 316                     ;;
 317
 318             hpux*)
 319                     V_CCOPT="$V_CCOPT +z"
 320                     V_SHLIB_CMD="\$(LD)"
 321                     V_SHLIB_OPT="-b"
 322                     V_SONAME_OPT="+h "
 323                     #
 324                     # By default, directories specifed with -L
 325                     # are added to the run-time search path, so
 326                     # we don't add them in pcap-config.
 327                     #
 328                     ;;
 329
 330             osf*)
 331                     #
 332                     # Presumed to be DEC OSF/1, Digital UNIX, or
 333                     # Tru64 UNIX.
 334                     #
 335                     V_SHLIB_CMD="\$(CC)"
 336                     V_SHLIB_OPT="-shared"
 337                     V_SONAME_OPT="-soname "
 338                     V_RPATH_OPT="-rpath "
 339                     ;;
 340
 341             solaris*)
 342                     V_CCOPT="$V_CCOPT -Kpic"
 343                     V_SHLIB_CMD="\$(CC)"
 344                     V_SHLIB_OPT="-G"
 345                     V_SONAME_OPT="-h "
 346                     V_RPATH_OPT="-R"
 347                     ;;
 348             esac
 349     fi
 350 ])
 351
 352 #
 353 # Try compiling a sample of the type of code that appears in
 354 # gencode.c with "inline", "__inline__", and "__inline".
 355 #
 356 # Autoconf's AC_C_INLINE, at least in autoconf 2.13, isn't good enough,
 357 # as it just tests whether a function returning "int" can be inlined;
 358 # at least some versions of HP's C compiler can inline that, but can't
 359 # inline a function that returns a struct pointer.
 360 #
 361 # Make sure we use the V_CCOPT flags, because some of those might
 362 # disable inlining.
 363 #
 364 AC_DEFUN(AC_LBL_C_INLINE,
 365     [AC_MSG_CHECKING(for inline)
 366     save_CFLAGS="$CFLAGS"
 367     CFLAGS="$V_CCOPT"
 368     AC_CACHE_VAL(ac_cv_lbl_inline, [
 369         ac_cv_lbl_inline=""
 370         ac_lbl_cc_inline=no
 371         for ac_lbl_inline in inline __inline__ __inline
 372         do
 373             AC_TRY_COMPILE(
 374                 [#define inline $ac_lbl_inline
 375                 static inline struct iltest *foo(void);
 376                 struct iltest {
 377                     int iltest1;
 378                     int iltest2;
 379                 };
 380
 381                 static inline struct iltest *
 382                 foo()
 383                 {
 384                     static struct iltest xxx;
 385
 386                     return &xxx;
 387                 }],,ac_lbl_cc_inline=yes,)
 388             if test "$ac_lbl_cc_inline" = yes ; then
 389                 break;
 390             fi
 391         done
 392         if test "$ac_lbl_cc_inline" = yes ; then
 393             ac_cv_lbl_inline=$ac_lbl_inline
 394         fi])
 395     CFLAGS="$save_CFLAGS"
 396     if test ! -z "$ac_cv_lbl_inline" ; then
 397         AC_MSG_RESULT($ac_cv_lbl_inline)
 398     else
 399         AC_MSG_RESULT(no)
 400     fi
 401     AC_DEFINE_UNQUOTED(inline, $ac_cv_lbl_inline, [Define as token for inline if inlining supported])])
 402
 403 dnl
 404 dnl If using gcc, make sure we have ANSI ioctl definitions
 405 dnl
 406 dnl usage:
 407 dnl
 408 dnl     AC_LBL_FIXINCLUDES
 409 dnl
 410 AC_DEFUN(AC_LBL_FIXINCLUDES,
 411     [if test "$GCC" = yes ; then
 412             AC_MSG_CHECKING(for ANSI ioctl definitions)
 413             AC_CACHE_VAL(ac_cv_lbl_gcc_fixincludes,
 414                 AC_TRY_COMPILE(
 415                     [/*
 416                      * This generates a "duplicate case value" when fixincludes
 417                      * has not be run.
 418                      */
 419 #               include <sys/types.h>
 420 #               include <sys/time.h>
 421 #               include <sys/ioctl.h>
 422 #               ifdef HAVE_SYS_IOCCOM_H
 423 #               include <sys/ioccom.h>
 424 #               endif],
 425                     [switch (0) {
 426                     case _IO('A', 1):;
 427                     case _IO('B', 1):;
 428                     }],
 429                     ac_cv_lbl_gcc_fixincludes=yes,
 430                     ac_cv_lbl_gcc_fixincludes=no))
 431             AC_MSG_RESULT($ac_cv_lbl_gcc_fixincludes)
 432             if test $ac_cv_lbl_gcc_fixincludes = no ; then
 433                     # Don't cache failure
 434                     unset ac_cv_lbl_gcc_fixincludes
 435                     AC_MSG_ERROR(see the INSTALL for more info)
 436             fi
 437     fi])
 438
 439 dnl
 440 dnl Check for flex, default to lex
 441 dnl Require flex 2.4 or higher
 442 dnl Check for bison, default to yacc
 443 dnl Default to lex/yacc if both flex and bison are not available
 444 dnl Define the yy prefix string if using flex and bison
 445 dnl
 446 dnl usage:
 447 dnl
 448 dnl     AC_LBL_LEX_AND_YACC(lex, yacc, yyprefix)
 449 dnl
 450 dnl results:
 451 dnl
 452 dnl     $1 (lex set)
 453 dnl     $2 (yacc appended)
 454 dnl     $3 (optional flex and bison -P prefix)
 455 dnl
 456 AC_DEFUN(AC_LBL_LEX_AND_YACC,
 457     [AC_ARG_WITH(flex, [  --without-flex          don't use flex])
 458     AC_ARG_WITH(bison, [  --without-bison         don't use bison])
 459     if test "$with_flex" = no ; then
 460             $1=lex
 461     else
 462             AC_CHECK_PROGS($1, flex, lex)
 463     fi
 464     if test "$$1" = flex ; then
 465             # The -V flag was added in 2.4
 466             AC_MSG_CHECKING(for flex 2.4 or higher)
 467             AC_CACHE_VAL(ac_cv_lbl_flex_v24,
 468                 if flex -V >/dev/null 2>&1; then
 469                         ac_cv_lbl_flex_v24=yes
 470                 else
 471                         ac_cv_lbl_flex_v24=no
 472                 fi)
 473             AC_MSG_RESULT($ac_cv_lbl_flex_v24)
 474             if test $ac_cv_lbl_flex_v24 = no ; then
 475                     s="2.4 or higher required"
 476                     AC_MSG_WARN(ignoring obsolete flex executable ($s))
 477                     $1=lex
 478             fi
 479     fi
 480     if test "$with_bison" = no ; then
 481             $2=yacc
 482     else
 483             AC_CHECK_PROGS($2, bison, yacc)
 484     fi
 485     if test "$$2" = bison ; then
 486             $2="$$2 -y"
 487     fi
 488     if test "$$1" != lex -a "$$2" = yacc -o "$$1" = lex -a "$$2" != yacc ; then
 489             AC_MSG_WARN(don't have both flex and bison; reverting to lex/yacc)
 490             $1=lex
 491             $2=yacc
 492     fi
 493     if test "$$1" = flex -a -n "$3" ; then
 494             $1="$$1 -P$3"
 495             $2="$$2 -p $3"
 496     fi])
 497
 498 dnl
 499 dnl Checks to see if union wait is used with WEXITSTATUS()
 500 dnl
 501 dnl usage:
 502 dnl
 503 dnl     AC_LBL_UNION_WAIT
 504 dnl
 505 dnl results:
 506 dnl
 507 dnl     DECLWAITSTATUS (defined)
 508 dnl
 509 AC_DEFUN(AC_LBL_UNION_WAIT,
 510     [AC_MSG_CHECKING(if union wait is used)
 511     AC_CACHE_VAL(ac_cv_lbl_union_wait,
 512         AC_TRY_COMPILE([
 513 #       include <sys/types.h>
 514 #       include <sys/wait.h>],
 515             [int status;
 516             u_int i = WEXITSTATUS(status);
 517             u_int j = waitpid(0, &status, 0);],
 518             ac_cv_lbl_union_wait=no,
 519             ac_cv_lbl_union_wait=yes))
 520     AC_MSG_RESULT($ac_cv_lbl_union_wait)
 521     if test $ac_cv_lbl_union_wait = yes ; then
 522             AC_DEFINE(DECLWAITSTATUS,union wait,[type for wait])
 523     else
 524             AC_DEFINE(DECLWAITSTATUS,int,[type for wait])
 525     fi])
 526
 527 dnl
 528 dnl Checks to see if the sockaddr struct has the 4.4 BSD sa_len member
 529 dnl
 530 dnl usage:
 531 dnl
 532 dnl     AC_LBL_SOCKADDR_SA_LEN
 533 dnl
 534 dnl results:
 535 dnl
 536 dnl     HAVE_SOCKADDR_SA_LEN (defined)
 537 dnl
 538 AC_DEFUN(AC_LBL_SOCKADDR_SA_LEN,
 539     [AC_MSG_CHECKING(if sockaddr struct has the sa_len member)
 540     AC_CACHE_VAL(ac_cv_lbl_sockaddr_has_sa_len,
 541         AC_TRY_COMPILE([
 542 #       include <sys/types.h>
 543 #       include <sys/socket.h>],
 544         [u_int i = sizeof(((struct sockaddr *)0)->sa_len)],
 545         ac_cv_lbl_sockaddr_has_sa_len=yes,
 546         ac_cv_lbl_sockaddr_has_sa_len=no))
 547     AC_MSG_RESULT($ac_cv_lbl_sockaddr_has_sa_len)
 548     if test $ac_cv_lbl_sockaddr_has_sa_len = yes ; then
 549             AC_DEFINE(HAVE_SOCKADDR_SA_LEN,1,[if struct sockaddr has the sa_len member])
 550     fi])
 551
 552 dnl
 553 dnl Checks to see if there's a sockaddr_storage structure
 554 dnl
 555 dnl usage:
 556 dnl
 557 dnl     AC_LBL_SOCKADDR_STORAGE
 558 dnl
 559 dnl results:
 560 dnl
 561 dnl     HAVE_SOCKADDR_STORAGE (defined)
 562 dnl
 563 AC_DEFUN(AC_LBL_SOCKADDR_STORAGE,
 564     [AC_MSG_CHECKING(if sockaddr_storage struct exists)
 565     AC_CACHE_VAL(ac_cv_lbl_has_sockaddr_storage,
 566         AC_TRY_COMPILE([
 567 #       include <sys/types.h>
 568 #       include <sys/socket.h>],
 569         [u_int i = sizeof (struct sockaddr_storage)],
 570         ac_cv_lbl_has_sockaddr_storage=yes,
 571         ac_cv_lbl_has_sockaddr_storage=no))
 572     AC_MSG_RESULT($ac_cv_lbl_has_sockaddr_storage)
 573     if test $ac_cv_lbl_has_sockaddr_storage = yes ; then
 574             AC_DEFINE(HAVE_SOCKADDR_STORAGE,1,[if struct sockaddr_storage exists])
 575     fi])
 576
 577 dnl
 578 dnl Checks to see if the dl_hp_ppa_info_t struct has the HP-UX 11.00
 579 dnl dl_module_id_1 member
 580 dnl
 581 dnl usage:
 582 dnl
 583 dnl     AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1
 584 dnl
 585 dnl results:
 586 dnl
 587 dnl     HAVE_HP_PPA_INFO_T_DL_MODULE_ID_1 (defined)
 588 dnl
 589 dnl NOTE: any compile failure means we conclude that it doesn't have
 590 dnl that member, so if we don't have DLPI, don't have a <sys/dlpi_ext.h>
 591 dnl header, or have one that doesn't declare a dl_hp_ppa_info_t type,
 592 dnl we conclude it doesn't have that member (which is OK, as either we
 593 dnl won't be using code that would use that member, or we wouldn't
 594 dnl compile in any case).
 595 dnl
 596 AC_DEFUN(AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1,
 597     [AC_MSG_CHECKING(if dl_hp_ppa_info_t struct has dl_module_id_1 member)
 598     AC_CACHE_VAL(ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1,
 599         AC_TRY_COMPILE([
 600 #       include <sys/types.h>
 601 #       include <sys/dlpi.h>
 602 #       include <sys/dlpi_ext.h>],
 603         [u_int i = sizeof(((dl_hp_ppa_info_t *)0)->dl_module_id_1)],
 604         ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1=yes,
 605         ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1=no))
 606     AC_MSG_RESULT($ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1)
 607     if test $ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1 = yes ; then
 608             AC_DEFINE(HAVE_HP_PPA_INFO_T_DL_MODULE_ID_1,1,[if ppa_info_t_dl_module_id exists])
 609     fi])
 610
 611 dnl
 612 dnl Checks to see if -R is used
 613 dnl
 614 dnl usage:
 615 dnl
 616 dnl     AC_LBL_HAVE_RUN_PATH
 617 dnl
 618 dnl results:
 619 dnl
 620 dnl     ac_cv_lbl_have_run_path (yes or no)
 621 dnl
 622 AC_DEFUN(AC_LBL_HAVE_RUN_PATH,
 623     [AC_MSG_CHECKING(for ${CC-cc} -R)
 624     AC_CACHE_VAL(ac_cv_lbl_have_run_path,
 625         [echo 'main(){}' > conftest.c
 626         ${CC-cc} -o conftest conftest.c -R/a1/b2/c3 >conftest.out 2>&1
 627         if test ! -s conftest.out ; then
 628                 ac_cv_lbl_have_run_path=yes
 629         else
 630                 ac_cv_lbl_have_run_path=no
 631         fi
 632         rm -f -r conftest*])
 633     AC_MSG_RESULT($ac_cv_lbl_have_run_path)
 634     ])
 635
 636 dnl
 637 dnl Checks to see if unaligned memory accesses fail
 638 dnl
 639 dnl usage:
 640 dnl
 641 dnl     AC_LBL_UNALIGNED_ACCESS
 642 dnl
 643 dnl results:
 644 dnl
 645 dnl     LBL_ALIGN (DEFINED)
 646 dnl
 647 AC_DEFUN(AC_LBL_UNALIGNED_ACCESS,
 648     [AC_MSG_CHECKING(if unaligned accesses fail)
 649     AC_CACHE_VAL(ac_cv_lbl_unaligned_fail,
 650         [case "$host_cpu" in
 651
 652         #
 653         # These are CPU types where:
 654         #
 655         #       the CPU faults on an unaligned access, but at least some
 656         #       OSes that support that CPU catch the fault and simulate
 657         #       the unaligned access (e.g., Alpha/{Digital,Tru64} UNIX) -
 658         #       the simulation is slow, so we don't want to use it;
 659         #
 660         #       the CPU, I infer (from the old
 661         #
 662         # XXX: should also check that they don't do weird things (like on arm)
 663         #
 664         #       comment) doesn't fault on unaligned accesses, but doesn't
 665         #       do a normal unaligned fetch, either (e.g., presumably, ARM);
 666         #
 667         #       for whatever reason, the test program doesn't work
 668         #       (this has been claimed to be the case for several of those
 669         #       CPUs - I don't know what the problem is; the problem
 670         #       was reported as "the test program dumps core" for SuperH,
 671         #       but that's what the test program is *supposed* to do -
 672         #       it dumps core before it writes anything, so the test
 673         #       for an empty output file should find an empty output
 674         #       file and conclude that unaligned accesses don't work).
 675         #
 676         # This run-time test won't work if you're cross-compiling, so
 677         # in order to support cross-compiling for a particular CPU,
 678         # we have to wire in the list of CPU types anyway, as far as
 679         # I know, so perhaps we should just have a set of CPUs on
 680         # which we know it doesn't work, a set of CPUs on which we
 681         # know it does work, and have the script just fail on other
 682         # cpu types and update it when such a failure occurs.
 683         #
 684         alpha*|arm*|bfin*|hp*|mips*|sh*|sparc*|ia64|nv1)
 685                 ac_cv_lbl_unaligned_fail=yes
 686                 ;;
 687
 688         *)
 689                 cat >conftest.c <<EOF
 690 #               include <sys/types.h>
 691 #               include <sys/wait.h>
 692 #               include <stdio.h>
 693                 unsigned char a[[5]] = { 1, 2, 3, 4, 5 };
 694                 main() {
 695                 unsigned int i;
 696                 pid_t pid;
 697                 int status;
 698                 /* avoid "core dumped" message */
 699                 pid = fork();
 700                 if (pid <  0)
 701                         exit(2);
 702                 if (pid > 0) {
 703                         /* parent */
 704                         pid = waitpid(pid, &status, 0);
 705                         if (pid < 0)
 706                                 exit(3);
 707                         exit(!WIFEXITED(status));
 708                 }
 709                 /* child */
 710                 i = *(unsigned int *)&a[[1]];
 711                 printf("%d\n", i);
 712                 exit(0);
 713                 }
 714 EOF
 715                 ${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS \
 716                     conftest.c $LIBS >/dev/null 2>&1
 717                 if test ! -x conftest ; then
 718                         dnl failed to compile for some reason
 719                         ac_cv_lbl_unaligned_fail=yes
 720                 else
 721                         ./conftest >conftest.out
 722                         if test ! -s conftest.out ; then
 723                                 ac_cv_lbl_unaligned_fail=yes
 724                         else
 725                                 ac_cv_lbl_unaligned_fail=no
 726                         fi
 727                 fi
 728                 rm -f -r conftest* core core.conftest
 729                 ;;
 730         esac])
 731     AC_MSG_RESULT($ac_cv_lbl_unaligned_fail)
 732     if test $ac_cv_lbl_unaligned_fail = yes ; then
 733             AC_DEFINE(LBL_ALIGN,1,[if unaligned access fails])
 734     fi])
 735
 736 dnl
 737 dnl If using gcc and the file .devel exists:
 738 dnl     Compile with -g (if supported) and -Wall
 739 dnl     If using gcc 2 or later, do extra prototype checking
 740 dnl     If an os prototype include exists, symlink os-proto.h to it
 741 dnl
 742 dnl usage:
 743 dnl
 744 dnl     AC_LBL_DEVEL(copt)
 745 dnl
 746 dnl results:
 747 dnl
 748 dnl     $1 (copt appended)
 749 dnl     HAVE_OS_PROTO_H (defined)
 750 dnl     os-proto.h (symlinked)
 751 dnl
 752 AC_DEFUN(AC_LBL_DEVEL,
 753     [rm -f os-proto.h
 754     if test "${LBL_CFLAGS+set}" = set; then
 755             $1="$$1 ${LBL_CFLAGS}"
 756     fi
 757     if test -f .devel ; then
 758             if test "$GCC" = yes ; then
 759                     if test "${LBL_CFLAGS+set}" != set; then
 760                             if test "$ac_cv_prog_cc_g" = yes ; then
 761                                     $1="-g $$1"
 762                             fi
 763                             $1="$$1 -Wall"
 764                             if test $ac_cv_lbl_gcc_vers -gt 1 ; then
 765                                     $1="$$1 -Wmissing-prototypes -Wstrict-prototypes"
 766                             fi
 767                     fi
 768             else
 769                     case "$host_os" in
 770
 771                     irix6*)
 772                             V_CCOPT="$V_CCOPT -n32"
 773                             ;;
 774
 775                     *)
 776                             ;;
 777                     esac
 778             fi
 779             os=`echo $host_os | sed -e 's/\([[0-9]][[0-9]]*\)[[^0-9]].*$/\1/'`
 780             name="lbl/os-$os.h"
 781             if test -f $name ; then
 782                     ln -s $name os-proto.h
 783                     AC_DEFINE(HAVE_OS_PROTO_H, 1,
 784                         [if there's an os_proto.h for this platform, to use additional prototypes])
 785             else
 786                     AC_MSG_WARN(can't find $name)
 787             fi
 788     fi])
 789
 790 dnl
 791 dnl Improved version of AC_CHECK_LIB
 792 dnl
 793 dnl Thanks to John Hawkinson (jhawk@mit.edu)
 794 dnl
 795 dnl usage:
 796 dnl
 797 dnl     AC_LBL_CHECK_LIB(LIBRARY, FUNCTION [, ACTION-IF-FOUND [,
 798 dnl         ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
 799 dnl
 800 dnl results:
 801 dnl
 802 dnl     LIBS
 803 dnl
 804 dnl XXX - "AC_LBL_LIBRARY_NET" was redone to use "AC_SEARCH_LIBS"
 805 dnl rather than "AC_LBL_CHECK_LIB", so this isn't used any more.
 806 dnl We keep it around for reference purposes in case it's ever
 807 dnl useful in the future.
 808 dnl
 809
 810 define(AC_LBL_CHECK_LIB,
 811 [AC_MSG_CHECKING([for $2 in -l$1])
 812 dnl Use a cache variable name containing the library, function
 813 dnl name, and extra libraries to link with, because the test really is
 814 dnl for library $1 defining function $2, when linked with potinal
 815 dnl library $5, not just for library $1.  Separate tests with the same
 816 dnl $1 and different $2's or $5's may have different results.
 817 ac_lib_var=`echo $1['_']$2['_']$5 | sed 'y%./+- %__p__%'`
 818 AC_CACHE_VAL(ac_cv_lbl_lib_$ac_lib_var,
 819 [ac_save_LIBS="$LIBS"
 820 LIBS="-l$1 $5 $LIBS"
 821 AC_TRY_LINK(dnl
 822 ifelse([$2], [main], , dnl Avoid conflicting decl of main.
 823 [/* Override any gcc2 internal prototype to avoid an error.  */
 824 ]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
 825 extern "C"
 826 #endif
 827 ])dnl
 828 [/* We use char because int might match the return type of a gcc2
 829     builtin and then its argument prototype would still apply.  */
 830 char $2();
 831 ]),
 832             [$2()],
 833             eval "ac_cv_lbl_lib_$ac_lib_var=yes",
 834             eval "ac_cv_lbl_lib_$ac_lib_var=no")
 835 LIBS="$ac_save_LIBS"
 836 ])dnl
 837 if eval "test \"`echo '$ac_cv_lbl_lib_'$ac_lib_var`\" = yes"; then
 838   AC_MSG_RESULT(yes)
 839   ifelse([$3], ,
 840 [changequote(, )dnl
 841   ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \
 842     -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
 843 changequote([, ])dnl
 844   AC_DEFINE_UNQUOTED($ac_tr_lib)
 845   LIBS="-l$1 $LIBS"
 846 ], [$3])
 847 else
 848   AC_MSG_RESULT(no)
 849 ifelse([$4], , , [$4
 850 ])dnl
 851 fi
 852 ])
 853
 854 dnl
 855 dnl AC_LBL_LIBRARY_NET
 856 dnl
 857 dnl This test is for network applications that need socket() and
 858 dnl gethostbyname() -ish functions.  Under Solaris, those applications
 859 dnl need to link with "-lsocket -lnsl".  Under IRIX, they need to link
 860 dnl with "-lnsl" but should *not* link with "-lsocket" because
 861 dnl libsocket.a breaks a number of things (for instance:
 862 dnl gethostbyname() under IRIX 5.2, and snoop sockets under most
 863 dnl versions of IRIX).
 864 dnl
 865 dnl Unfortunately, many application developers are not aware of this,
 866 dnl and mistakenly write tests that cause -lsocket to be used under
 867 dnl IRIX.  It is also easy to write tests that cause -lnsl to be used
 868 dnl under operating systems where neither are necessary (or useful),
 869 dnl such as SunOS 4.1.4, which uses -lnsl for TLI.
 870 dnl
 871 dnl This test exists so that every application developer does not test
 872 dnl this in a different, and subtly broken fashion.
 873
 874 dnl It has been argued that this test should be broken up into two
 875 dnl seperate tests, one for the resolver libraries, and one for the
 876 dnl libraries necessary for using Sockets API. Unfortunately, the two
 877 dnl are carefully intertwined and allowing the autoconf user to use
 878 dnl them independantly potentially results in unfortunate ordering
 879 dnl dependancies -- as such, such component macros would have to
 880 dnl carefully use indirection and be aware if the other components were
 881 dnl executed. Since other autoconf macros do not go to this trouble,
 882 dnl and almost no applications use sockets without the resolver, this
 883 dnl complexity has not been implemented.
 884 dnl
 885 dnl The check for libresolv is in case you are attempting to link
 886 dnl statically and happen to have a libresolv.a lying around (and no
 887 dnl libnsl.a).
 888 dnl
 889 AC_DEFUN(AC_LBL_LIBRARY_NET, [
 890     # Most operating systems have gethostbyname() in the default searched
 891     # libraries (i.e. libc):
 892     # Some OSes (eg. Solaris) place it in libnsl
 893     # Some strange OSes (SINIX) have it in libsocket:
 894     AC_SEARCH_LIBS(gethostbyname, nsl socket resolv)
 895     # Unfortunately libsocket sometimes depends on libnsl and
 896     # AC_SEARCH_LIBS isn't up to the task of handling dependencies like this.
 897     if test "$ac_cv_search_gethostbyname" = "no"
 898     then
 899         AC_CHECK_LIB(socket, gethostbyname,
 900                      LIBS="-lsocket -lnsl $LIBS", , -lnsl)
 901     fi
 902     AC_SEARCH_LIBS(socket, socket, ,
 903         AC_CHECK_LIB(socket, socket, LIBS="-lsocket -lnsl $LIBS", , -lnsl))
 904     # DLPI needs putmsg under HPUX so test for -lstr while we're at it
 905     AC_SEARCH_LIBS(putmsg, str)
 906     ])
 907
 908 dnl
 909 dnl Test for __attribute__
 910 dnl
 911
 912 AC_DEFUN(AC_C___ATTRIBUTE__, [
 913 AC_MSG_CHECKING(for __attribute__)
 914 AC_CACHE_VAL(ac_cv___attribute__, [
 915 AC_COMPILE_IFELSE(
 916   AC_LANG_SOURCE([[
 917 #include <stdlib.h>
 918
 919 static void foo(void) __attribute__ ((noreturn));
 920
 921 static void
 922 foo(void)
 923 {
 924   exit(1);
 925 }
 926
 927 int
 928 main(int argc, char **argv)
 929 {
 930   foo();
 931 }
 932   ]]),
 933 ac_cv___attribute__=yes,
 934 ac_cv___attribute__=no)])
 935 if test "$ac_cv___attribute__" = "yes"; then
 936   AC_DEFINE(HAVE___ATTRIBUTE__, 1, [define if your compiler has __attribute__])
 937   V_DEFS="$V_DEFS -D_U_=\"__attribute__((unused))\""
 938 else
 939   V_DEFS="$V_DEFS -D_U_=\"\""
 940 fi
 941 AC_MSG_RESULT($ac_cv___attribute__)
 942 ])
 943
 944 dnl
 945 dnl Checks to see if tpacket_stats is defined in linux/if_packet.h
 946 dnl If so then pcap-linux.c can use this to report proper statistics.
 947 dnl
 948 dnl -Scott Barron
 949 dnl
 950 AC_DEFUN(AC_LBL_TPACKET_STATS,
 951    [AC_MSG_CHECKING(if if_packet.h has tpacket_stats defined)
 952    AC_CACHE_VAL(ac_cv_lbl_tpacket_stats,
 953    AC_TRY_COMPILE([
 954 #  include <linux/if_packet.h>],
 955    [struct tpacket_stats stats],
 956    ac_cv_lbl_tpacket_stats=yes,
 957    ac_cv_lbl_tpacket_stats=no))
 958    AC_MSG_RESULT($ac_cv_lbl_tpacket_stats)
 959    if test $ac_cv_lbl_tpacket_stats = yes; then
 960        AC_DEFINE(HAVE_TPACKET_STATS,1,[if if_packet.h has tpacket_stats defined])
 961    fi])
 962
 963 dnl
 964 dnl Checks to see if the tpacket_auxdata struct has a tp_vlan_tci member.
 965 dnl
 966 dnl usage:
 967 dnl
 968 dnl     AC_LBL_LINUX_TPACKET_AUXDATA_TP_VLAN_TCI
 969 dnl
 970 dnl results:
 971 dnl
 972 dnl     HAVE_LINUX_TPACKET_AUXDATA_TP_VLAN_TCI (defined)
 973 dnl
 974 dnl NOTE: any compile failure means we conclude that it doesn't have
 975 dnl that member, so if we don't have tpacket_auxdata, we conclude it
 976 dnl doesn't have that member (which is OK, as either we won't be using
 977 dnl code that would use that member, or we wouldn't compile in any case).
 978 dnl
 979 AC_DEFUN(AC_LBL_LINUX_TPACKET_AUXDATA_TP_VLAN_TCI,
 980     [AC_MSG_CHECKING(if tpacket_auxdata struct has tp_vlan_tci member)
 981     AC_CACHE_VAL(ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1,
 982         AC_TRY_COMPILE([
 983 #       include <linux/if_packet.h>],
 984         [u_int i = sizeof(((struct tpacket_auxdata *)0)->tp_vlan_tci)],
 985         ac_cv_lbl_linux_tpacket_auxdata_tp_vlan_tci=yes,
 986         ac_cv_lbl_linux_tpacket_auxdata_tp_vlan_tci=no))
 987     AC_MSG_RESULT($ac_cv_lbl_linux_tpacket_auxdata_tp_vlan_tci)
 988     if test $ac_cv_lbl_linux_tpacket_auxdata_tp_vlan_tci = yes ; then
 989             HAVE_LINUX_TPACKET_AUXDATA=tp_vlan_tci
 990             AC_SUBST(HAVE_LINUX_TPACKET_AUXDATA)
 991             AC_DEFINE(HAVE_LINUX_TPACKET_AUXDATA_TP_VLAN_TCI,1,[if tp_vlan_tci exists])
 992     fi])
 993
 994 dnl
 995 dnl Checks to see if Solaris has the dl_passive_req_t struct defined
 996 dnl in <sys/dlpi.h>.
 997 dnl
 998 dnl usage:
 999 dnl
1000 dnl     AC_LBL_DL_PASSIVE_REQ_T
1001 dnl
1002 dnl results:
1003 dnl
1004 dnl     HAVE_DLPI_PASSIVE (defined)
1005 dnl
1006 AC_DEFUN(AC_LBL_DL_PASSIVE_REQ_T,
1007         [AC_MSG_CHECKING(if dl_passive_req_t struct exists)
1008        AC_CACHE_VAL(ac_cv_lbl_has_dl_passive_req_t,
1009                 AC_TRY_COMPILE([
1010 #       include <sys/types.h>
1011 #       include <sys/dlpi.h>],
1012         [u_int i = sizeof(dl_passive_req_t)],
1013         ac_cv_lbl_has_dl_passive_req_t=yes,
1014         ac_cv_lbl_has_dl_passive_req_t=no))
1015     AC_MSG_RESULT($ac_cv_lbl_has_dl_passive_req_t)
1016     if test $ac_cv_lbl_has_dl_passive_req_t = yes ; then
1017             AC_DEFINE(HAVE_DLPI_PASSIVE,1,[if passive_req_t primitive
1018                 exists])
1019     fi])