dnl @(#) $Header: /cvsroot/src/dist/libpcap/Attic/aclocal.m4,v 1.1.1.1 2006/02/27 15:45:40 drochner Exp $ (LBL) dnl dnl Copyright (c) 1995, 1996, 1997, 1998 dnl The Regents of the University of California. All rights reserved. dnl dnl Redistribution and use in source and binary forms, with or without dnl modification, are permitted provided that: (1) source code distributions dnl retain the above copyright notice and this paragraph in its entirety, (2) dnl distributions including binary code include the above copyright notice and dnl this paragraph in its entirety in the documentation or other materials dnl provided with the distribution, and (3) all advertising materials mentioning dnl features or use of this software display the following acknowledgement: dnl ``This product includes software developed by the University of California, dnl Lawrence Berkeley Laboratory and its contributors.'' Neither the name of dnl the University nor the names of its contributors may be used to endorse dnl or promote products derived from this software without specific prior dnl written permission. dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED dnl WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. dnl dnl LBL autoconf macros dnl dnl dnl Determine which compiler we're using (cc or gcc) dnl If using gcc, determine the version number dnl If using cc, require that it support ansi prototypes dnl If using gcc, use -O2 (otherwise use -O) dnl If using cc, explicitly specify /usr/local/include dnl dnl usage: dnl dnl AC_LBL_C_INIT(copt, incls) dnl dnl results: dnl dnl $1 (copt set) dnl $2 (incls set) dnl CC dnl LDFLAGS dnl ac_cv_lbl_gcc_vers dnl LBL_CFLAGS dnl AC_DEFUN(AC_LBL_C_INIT, [AC_PREREQ(2.12) AC_BEFORE([$0], [AC_PROG_CC]) AC_BEFORE([$0], [AC_LBL_FIXINCLUDES]) AC_BEFORE([$0], [AC_LBL_DEVEL]) AC_ARG_WITH(gcc, [ --without-gcc don't use gcc]) $1="-O" $2="" if test "${srcdir}" != "." ; then $2="-I\$(srcdir)" fi if test "${CFLAGS+set}" = set; then LBL_CFLAGS="$CFLAGS" fi if test -z "$CC" ; then case "$target_os" in bsdi*) AC_CHECK_PROG(SHLICC2, shlicc2, yes, no) if test $SHLICC2 = yes ; then CC=shlicc2 export CC fi ;; esac fi if test -z "$CC" -a "$with_gcc" = no ; then CC=cc export CC fi AC_PROG_CC if test "$GCC" = yes ; then if test "$SHLICC2" = yes ; then ac_cv_lbl_gcc_vers=2 $1="-O2" else AC_MSG_CHECKING(gcc version) AC_CACHE_VAL(ac_cv_lbl_gcc_vers, ac_cv_lbl_gcc_vers=`$CC -v 2>&1 | \ sed -e '/^gcc version /!d' \ -e 's/^gcc version //' \ -e 's/ .*//' -e 's/^[[[^0-9]]]*//' \ -e 's/\..*//'`) AC_MSG_RESULT($ac_cv_lbl_gcc_vers) if test $ac_cv_lbl_gcc_vers -gt 1 ; then $1="-O2" fi fi else AC_MSG_CHECKING(that $CC handles ansi prototypes) AC_CACHE_VAL(ac_cv_lbl_cc_ansi_prototypes, AC_TRY_COMPILE( [#include ], [int frob(int, char *)], ac_cv_lbl_cc_ansi_prototypes=yes, ac_cv_lbl_cc_ansi_prototypes=no)) AC_MSG_RESULT($ac_cv_lbl_cc_ansi_prototypes) if test $ac_cv_lbl_cc_ansi_prototypes = no ; then case "$target_os" in hpux*) AC_MSG_CHECKING(for HP-UX ansi compiler ($CC -Aa -D_HPUX_SOURCE)) savedcflags="$CFLAGS" CFLAGS="-Aa -D_HPUX_SOURCE $CFLAGS" AC_CACHE_VAL(ac_cv_lbl_cc_hpux_cc_aa, AC_TRY_COMPILE( [#include ], [int frob(int, char *)], ac_cv_lbl_cc_hpux_cc_aa=yes, ac_cv_lbl_cc_hpux_cc_aa=no)) AC_MSG_RESULT($ac_cv_lbl_cc_hpux_cc_aa) if test $ac_cv_lbl_cc_hpux_cc_aa = no ; then AC_MSG_ERROR(see the INSTALL doc for more info) fi CFLAGS="$savedcflags" V_CCOPT="-Aa $V_CCOPT" AC_DEFINE(_HPUX_SOURCE,1,[needed on HP-UX]) ;; *) AC_MSG_ERROR(see the INSTALL doc for more info) ;; esac fi $2="$$2 -I/usr/local/include" LDFLAGS="$LDFLAGS -L/usr/local/lib" case "$target_os" in irix*) V_CCOPT="$V_CCOPT -xansi -signed -g3" ;; osf*) V_CCOPT="$V_CCOPT -std1 -g3" ;; ultrix*) AC_MSG_CHECKING(that Ultrix $CC hacks const in prototypes) AC_CACHE_VAL(ac_cv_lbl_cc_const_proto, AC_TRY_COMPILE( [#include ], [struct a { int b; }; void c(const struct a *)], ac_cv_lbl_cc_const_proto=yes, ac_cv_lbl_cc_const_proto=no)) AC_MSG_RESULT($ac_cv_lbl_cc_const_proto) if test $ac_cv_lbl_cc_const_proto = no ; then AC_DEFINE(const,) fi ;; esac fi ]) # # Try compiling a sample of the type of code that appears in # gencode.c with "inline", "__inline__", and "__inline". # # Autoconf's AC_C_INLINE, at least in autoconf 2.13, isn't good enough, # as it just tests whether a function returning "int" can be inlined; # at least some versions of HP's C compiler can inline that, but can't # inline a function that returns a struct pointer. # # Make sure we use the V_CCOPT flags, because some of those might # disable inlining. # AC_DEFUN(AC_LBL_C_INLINE, [AC_MSG_CHECKING(for inline) save_CFLAGS="$CFLAGS" CFLAGS="$V_CCOPT" AC_CACHE_VAL(ac_cv_lbl_inline, [ ac_cv_lbl_inline="" ac_lbl_cc_inline=no for ac_lbl_inline in inline __inline__ __inline do AC_TRY_COMPILE( [#define inline $ac_lbl_inline static inline struct iltest *foo(void); struct iltest { int iltest1; int iltest2; }; static inline struct iltest * foo() { static struct iltest xxx; return &xxx; }],,ac_lbl_cc_inline=yes,) if test "$ac_lbl_cc_inline" = yes ; then break; fi done if test "$ac_lbl_cc_inline" = yes ; then ac_cv_lbl_inline=$ac_lbl_inline fi]) CFLAGS="$save_CFLAGS" if test ! -z "$ac_cv_lbl_inline" ; then AC_MSG_RESULT($ac_cv_lbl_inline) else AC_MSG_RESULT(no) fi AC_DEFINE_UNQUOTED(inline, $ac_cv_lbl_inline, [Define as token for inline if inlining supported])]) dnl dnl Use pfopen.c if available and pfopen() not in standard libraries dnl Require libpcap dnl Look for libpcap in .. dnl Use the installed libpcap if there is no local version dnl dnl usage: dnl dnl AC_LBL_LIBPCAP(pcapdep, incls) dnl dnl results: dnl dnl $1 (pcapdep set) dnl $2 (incls appended) dnl LIBS dnl LBL_LIBS dnl AC_DEFUN(AC_LBL_LIBPCAP, [AC_REQUIRE([AC_LBL_LIBRARY_NET]) dnl dnl save a copy before locating libpcap.a dnl LBL_LIBS="$LIBS" pfopen=/usr/examples/packetfilter/pfopen.c if test -f $pfopen ; then AC_CHECK_FUNCS(pfopen) if test $ac_cv_func_pfopen = "no" ; then AC_MSG_RESULT(Using $pfopen) LIBS="$LIBS $pfopen" fi fi AC_MSG_CHECKING(for local pcap library) libpcap=FAIL lastdir=FAIL places=`ls .. | sed -e 's,/$,,' -e 's,^,../,' | \ egrep '/libpcap-[[0-9]]*\.[[0-9]]*(\.[[0-9]]*)?([[ab]][[0-9]]*)?$'` for dir in $places ../libpcap libpcap ; do basedir=`echo $dir | sed -e 's/[[ab]][[0-9]]*$//'` if test $lastdir = $basedir ; then dnl skip alphas when an actual release is present continue; fi lastdir=$dir if test -r $dir/pcap.c ; then libpcap=$dir/libpcap.a d=$dir dnl continue and select the last one that exists fi done if test $libpcap = FAIL ; then AC_MSG_RESULT(not found) AC_CHECK_LIB(pcap, main, libpcap="-lpcap") if test $libpcap = FAIL ; then AC_MSG_ERROR(see the INSTALL doc for more info) fi else $1=$libpcap $2="-I$d $$2" AC_MSG_RESULT($libpcap) fi LIBS="$libpcap $LIBS" case "$target_os" in aix*) pseexe="/lib/pse.exp" AC_MSG_CHECKING(for $pseexe) if test -f $pseexe ; then AC_MSG_RESULT(yes) LIBS="$LIBS -I:$pseexe" fi ;; esac]) dnl dnl Define RETSIGTYPE and RETSIGVAL dnl dnl usage: dnl dnl AC_LBL_TYPE_SIGNAL dnl dnl results: dnl dnl RETSIGTYPE (defined) dnl RETSIGVAL (defined) dnl AC_DEFUN(AC_LBL_TYPE_SIGNAL, [AC_BEFORE([$0], [AC_LBL_LIBPCAP]) AC_TYPE_SIGNAL if test "$ac_cv_type_signal" = void ; then AC_DEFINE(RETSIGVAL,[],[return value of signal handlers]) else AC_DEFINE(RETSIGVAL,(0),[return value of signal handlers]) fi case "$target_os" in irix*) AC_DEFINE(_BSD_SIGNALS,1,[get BSD semantics on Irix]) ;; *) dnl prefer sigset() to sigaction() AC_CHECK_FUNCS(sigset) if test $ac_cv_func_sigset = no ; then AC_CHECK_FUNCS(sigaction) fi ;; esac]) dnl dnl If using gcc, make sure we have ANSI ioctl definitions dnl dnl usage: dnl dnl AC_LBL_FIXINCLUDES dnl AC_DEFUN(AC_LBL_FIXINCLUDES, [if test "$GCC" = yes ; then AC_MSG_CHECKING(for ANSI ioctl definitions) AC_CACHE_VAL(ac_cv_lbl_gcc_fixincludes, AC_TRY_COMPILE( [/* * This generates a "duplicate case value" when fixincludes * has not be run. */ # include # include # include # ifdef HAVE_SYS_IOCCOM_H # include # endif], [switch (0) { case _IO('A', 1):; case _IO('B', 1):; }], ac_cv_lbl_gcc_fixincludes=yes, ac_cv_lbl_gcc_fixincludes=no)) AC_MSG_RESULT($ac_cv_lbl_gcc_fixincludes) if test $ac_cv_lbl_gcc_fixincludes = no ; then # Don't cache failure unset ac_cv_lbl_gcc_fixincludes AC_MSG_ERROR(see the INSTALL for more info) fi fi]) dnl dnl Check for flex, default to lex dnl Require flex 2.4 or higher dnl Check for bison, default to yacc dnl Default to lex/yacc if both flex and bison are not available dnl Define the yy prefix string if using flex and bison dnl dnl usage: dnl dnl AC_LBL_LEX_AND_YACC(lex, yacc, yyprefix) dnl dnl results: dnl dnl $1 (lex set) dnl $2 (yacc appended) dnl $3 (optional flex and bison -P prefix) dnl AC_DEFUN(AC_LBL_LEX_AND_YACC, [AC_ARG_WITH(flex, [ --without-flex don't use flex]) AC_ARG_WITH(bison, [ --without-bison don't use bison]) if test "$with_flex" = no ; then $1=lex else AC_CHECK_PROGS($1, flex, lex) fi if test "$$1" = flex ; then # The -V flag was added in 2.4 AC_MSG_CHECKING(for flex 2.4 or higher) AC_CACHE_VAL(ac_cv_lbl_flex_v24, if flex -V >/dev/null 2>&1; then ac_cv_lbl_flex_v24=yes else ac_cv_lbl_flex_v24=no fi) AC_MSG_RESULT($ac_cv_lbl_flex_v24) if test $ac_cv_lbl_flex_v24 = no ; then s="2.4 or higher required" AC_MSG_WARN(ignoring obsolete flex executable ($s)) $1=lex fi fi if test "$with_bison" = no ; then $2=yacc else AC_CHECK_PROGS($2, bison, yacc) fi if test "$$2" = bison ; then $2="$$2 -y" fi if test "$$1" != lex -a "$$2" = yacc -o "$$1" = lex -a "$$2" != yacc ; then AC_MSG_WARN(don't have both flex and bison; reverting to lex/yacc) $1=lex $2=yacc fi if test "$$1" = flex -a -n "$3" ; then $1="$$1 -P$3" $2="$$2 -p $3" fi]) dnl dnl Checks to see if union wait is used with WEXITSTATUS() dnl dnl usage: dnl dnl AC_LBL_UNION_WAIT dnl dnl results: dnl dnl DECLWAITSTATUS (defined) dnl AC_DEFUN(AC_LBL_UNION_WAIT, [AC_MSG_CHECKING(if union wait is used) AC_CACHE_VAL(ac_cv_lbl_union_wait, AC_TRY_COMPILE([ # include # include ], [int status; u_int i = WEXITSTATUS(status); u_int j = waitpid(0, &status, 0);], ac_cv_lbl_union_wait=no, ac_cv_lbl_union_wait=yes)) AC_MSG_RESULT($ac_cv_lbl_union_wait) if test $ac_cv_lbl_union_wait = yes ; then AC_DEFINE(DECLWAITSTATUS,union wait,[type for wait]) else AC_DEFINE(DECLWAITSTATUS,int,[type for wait]) fi]) dnl dnl Checks to see if the sockaddr struct has the 4.4 BSD sa_len member dnl dnl usage: dnl dnl AC_LBL_SOCKADDR_SA_LEN dnl dnl results: dnl dnl HAVE_SOCKADDR_SA_LEN (defined) dnl AC_DEFUN(AC_LBL_SOCKADDR_SA_LEN, [AC_MSG_CHECKING(if sockaddr struct has sa_len member) AC_CACHE_VAL(ac_cv_lbl_sockaddr_has_sa_len, AC_TRY_COMPILE([ # include # include ], [u_int i = sizeof(((struct sockaddr *)0)->sa_len)], ac_cv_lbl_sockaddr_has_sa_len=yes, ac_cv_lbl_sockaddr_has_sa_len=no)) AC_MSG_RESULT($ac_cv_lbl_sockaddr_has_sa_len) if test $ac_cv_lbl_sockaddr_has_sa_len = yes ; then AC_DEFINE(HAVE_SOCKADDR_SA_LEN,1,[if struct sockaddr has sa_len]) fi]) dnl dnl Checks to see if there's a sockaddr_storage structure dnl dnl usage: dnl dnl AC_LBL_SOCKADDR_STORAGE dnl dnl results: dnl dnl HAVE_SOCKADDR_STORAGE (defined) dnl AC_DEFUN(AC_LBL_SOCKADDR_STORAGE, [AC_MSG_CHECKING(if sockaddr_storage struct exists) AC_CACHE_VAL(ac_cv_lbl_has_sockaddr_storage, AC_TRY_COMPILE([ # include # include ], [u_int i = sizeof (struct sockaddr_storage)], ac_cv_lbl_has_sockaddr_storage=yes, ac_cv_lbl_has_sockaddr_storage=no)) AC_MSG_RESULT($ac_cv_lbl_has_sockaddr_storage) if test $ac_cv_lbl_has_sockaddr_storage = yes ; then AC_DEFINE(HAVE_SOCKADDR_STORAGE,1,[if struct sockaddr_storage exists]) fi]) dnl dnl Checks to see if the dl_hp_ppa_info_t struct has the HP-UX 11.00 dnl dl_module_id_1 member dnl dnl usage: dnl dnl AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1 dnl dnl results: dnl dnl HAVE_HP_PPA_INFO_T_DL_MODULE_ID_1 (defined) dnl dnl NOTE: any compile failure means we conclude that it doesn't have dnl that member, so if we don't have DLPI, don't have a dnl header, or have one that doesn't declare a dl_hp_ppa_info_t type, dnl we conclude it doesn't have that member (which is OK, as either we dnl won't be using code that would use that member, or we wouldn't dnl compile in any case). dnl AC_DEFUN(AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1, [AC_MSG_CHECKING(if dl_hp_ppa_info_t struct has dl_module_id_1 member) AC_CACHE_VAL(ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1, AC_TRY_COMPILE([ # include # include # include ], [u_int i = sizeof(((dl_hp_ppa_info_t *)0)->dl_module_id_1)], ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1=yes, ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1=no)) AC_MSG_RESULT($ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1) if test $ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1 = yes ; then AC_DEFINE(HAVE_HP_PPA_INFO_T_DL_MODULE_ID_1,1,[if ppa_info_t_dl_module_id exists]) fi]) dnl dnl Checks to see if -R is used dnl dnl usage: dnl dnl AC_LBL_HAVE_RUN_PATH dnl dnl results: dnl dnl ac_cv_lbl_have_run_path (yes or no) dnl AC_DEFUN(AC_LBL_HAVE_RUN_PATH, [AC_MSG_CHECKING(for ${CC-cc} -R) AC_CACHE_VAL(ac_cv_lbl_have_run_path, [echo 'main(){}' > conftest.c ${CC-cc} -o conftest conftest.c -R/a1/b2/c3 >conftest.out 2>&1 if test ! -s conftest.out ; then ac_cv_lbl_have_run_path=yes else ac_cv_lbl_have_run_path=no fi rm -f conftest*]) AC_MSG_RESULT($ac_cv_lbl_have_run_path) ]) dnl dnl Due to the stupid way it's implemented, AC_CHECK_TYPE is nearly useless. dnl dnl usage: dnl dnl AC_LBL_CHECK_TYPE dnl dnl results: dnl dnl int32_t (defined) dnl u_int32_t (defined) dnl AC_DEFUN(AC_LBL_CHECK_TYPE, [AC_MSG_CHECKING(for $1 using $CC) AC_CACHE_VAL(ac_cv_lbl_have_$1, AC_TRY_COMPILE([ # include "confdefs.h" # include # if STDC_HEADERS # include # include # endif], [$1 i], ac_cv_lbl_have_$1=yes, ac_cv_lbl_have_$1=no)) AC_MSG_RESULT($ac_cv_lbl_have_$1) if test $ac_cv_lbl_have_$1 = no ; then AC_DEFINE($1, $2, [if we have $1]) fi]) dnl dnl Checks to see if unaligned memory accesses fail dnl dnl usage: dnl dnl AC_LBL_UNALIGNED_ACCESS dnl dnl results: dnl dnl LBL_ALIGN (DEFINED) dnl AC_DEFUN(AC_LBL_UNALIGNED_ACCESS, [AC_MSG_CHECKING(if unaligned accesses fail) AC_CACHE_VAL(ac_cv_lbl_unaligned_fail, [case "$host_cpu" in # # These are CPU types where: # # the CPU faults on an unaligned access, but at least some # OSes that support that CPU catch the fault and simulate # the unaligned access (e.g., Alpha/{Digital,Tru64} UNIX) - # the simulation is slow, so we don't want to use it; # # the CPU, I infer (from the old # # XXX: should also check that they don't do weird things (like on arm) # # comment) doesn't fault on unaligned accesses, but doesn't # do a normal unaligned fetch, either (e.g., presumably, ARM); # # for whatever reason, the test program doesn't work # (this has been claimed to be the case for several of those # CPUs - I don't know what the problem is; the problem # was reported as "the test program dumps core" for SuperH, # but that's what the test program is *supposed* to do - # it dumps core before it writes anything, so the test # for an empty output file should find an empty output # file and conclude that unaligned accesses don't work). # # This run-time test won't work if you're cross-compiling, so # in order to support cross-compiling for a particular CPU, # we have to wire in the list of CPU types anyway, as far as # I know, so perhaps we should just have a set of CPUs on # which we know it doesn't work, a set of CPUs on which we # know it does work, and have the script just fail on other # cpu types and update it when such a failure occurs. # alpha*|arm*|hp*|mips*|sh*|sparc*|ia64|nv1) ac_cv_lbl_unaligned_fail=yes ;; *) cat >conftest.c < # include # include unsigned char a[[5]] = { 1, 2, 3, 4, 5 }; main() { unsigned int i; pid_t pid; int status; /* avoid "core dumped" message */ pid = fork(); if (pid < 0) exit(2); if (pid > 0) { /* parent */ pid = waitpid(pid, &status, 0); if (pid < 0) exit(3); exit(!WIFEXITED(status)); } /* child */ i = *(unsigned int *)&a[[1]]; printf("%d\n", i); exit(0); } EOF ${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS \ conftest.c $LIBS >/dev/null 2>&1 if test ! -x conftest ; then dnl failed to compile for some reason ac_cv_lbl_unaligned_fail=yes else ./conftest >conftest.out if test ! -s conftest.out ; then ac_cv_lbl_unaligned_fail=yes else ac_cv_lbl_unaligned_fail=no fi fi rm -f conftest* core core.conftest ;; esac]) AC_MSG_RESULT($ac_cv_lbl_unaligned_fail) if test $ac_cv_lbl_unaligned_fail = yes ; then AC_DEFINE(LBL_ALIGN,1,[if unaligned access fails]) fi]) dnl dnl If using gcc and the file .devel exists: dnl Compile with -g (if supported) and -Wall dnl If using gcc 2, do extra prototype checking dnl If an os prototype include exists, symlink os-proto.h to it dnl dnl usage: dnl dnl AC_LBL_DEVEL(copt) dnl dnl results: dnl dnl $1 (copt appended) dnl HAVE_OS_PROTO_H (defined) dnl os-proto.h (symlinked) dnl AC_DEFUN(AC_LBL_DEVEL, [rm -f os-proto.h if test "${LBL_CFLAGS+set}" = set; then $1="$$1 ${LBL_CFLAGS}" fi if test -f .devel ; then if test "$GCC" = yes ; then if test "${LBL_CFLAGS+set}" != set; then if test "$ac_cv_prog_cc_g" = yes ; then $1="-g $$1" fi $1="$$1 -Wall" if test $ac_cv_lbl_gcc_vers -gt 1 ; then $1="$$1 -Wmissing-prototypes -Wstrict-prototypes" fi fi else case "$target_os" in irix6*) V_CCOPT="$V_CCOPT -n32" ;; *) ;; esac fi os=`echo $target_os | sed -e 's/\([[0-9]][[0-9]]*\)[[^0-9]].*$/\1/'` name="lbl/os-$os.h" if test -f $name ; then ln -s $name os-proto.h AC_DEFINE(HAVE_OS_PROTO_H,1,[if there's an os_proto.h]) else AC_MSG_WARN(can't find $name) fi fi]) dnl dnl Improved version of AC_CHECK_LIB dnl dnl Thanks to John Hawkinson (jhawk@mit.edu) dnl dnl usage: dnl dnl AC_LBL_CHECK_LIB(LIBRARY, FUNCTION [, ACTION-IF-FOUND [, dnl ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]]) dnl dnl results: dnl dnl LIBS dnl define(AC_LBL_CHECK_LIB, [AC_MSG_CHECKING([for $2 in -l$1]) dnl Use a cache variable name containing both the library and function name, dnl because the test really is for library $1 defining function $2, not dnl just for library $1. Separate tests with the same $1 and different $2's dnl may have different results. ac_lib_var=`echo $1['_']$2['_']$5 | sed 'y%./+- %__p__%'` AC_CACHE_VAL(ac_cv_lbl_lib_$ac_lib_var, [ac_save_LIBS="$LIBS" LIBS="-l$1 $5 $LIBS" AC_TRY_LINK(dnl ifelse([$2], [main], , dnl Avoid conflicting decl of main. [/* Override any gcc2 internal prototype to avoid an error. */ ]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus extern "C" #endif ])dnl [/* We use char because int might match the return type of a gcc2 builtin and then its argument prototype would still apply. */ char $2(); ]), [$2()], eval "ac_cv_lbl_lib_$ac_lib_var=yes", eval "ac_cv_lbl_lib_$ac_lib_var=no") LIBS="$ac_save_LIBS" ])dnl if eval "test \"`echo '$ac_cv_lbl_lib_'$ac_lib_var`\" = yes"; then AC_MSG_RESULT(yes) ifelse([$3], , [changequote(, )dnl ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \ -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'` changequote([, ])dnl AC_DEFINE_UNQUOTED($ac_tr_lib) LIBS="-l$1 $LIBS" ], [$3]) else AC_MSG_RESULT(no) ifelse([$4], , , [$4 ])dnl fi ]) dnl dnl AC_LBL_LIBRARY_NET dnl dnl This test is for network applications that need socket() and dnl gethostbyname() -ish functions. Under Solaris, those applications dnl need to link with "-lsocket -lnsl". Under IRIX, they need to link dnl with "-lnsl" but should *not* link with "-lsocket" because dnl libsocket.a breaks a number of things (for instance: dnl gethostbyname() under IRIX 5.2, and snoop sockets under most dnl versions of IRIX). dnl dnl Unfortunately, many application developers are not aware of this, dnl and mistakenly write tests that cause -lsocket to be used under dnl IRIX. It is also easy to write tests that cause -lnsl to be used dnl under operating systems where neither are necessary (or useful), dnl such as SunOS 4.1.4, which uses -lnsl for TLI. dnl dnl This test exists so that every application developer does not test dnl this in a different, and subtly broken fashion. dnl It has been argued that this test should be broken up into two dnl seperate tests, one for the resolver libraries, and one for the dnl libraries necessary for using Sockets API. Unfortunately, the two dnl are carefully intertwined and allowing the autoconf user to use dnl them independantly potentially results in unfortunate ordering dnl dependancies -- as such, such component macros would have to dnl carefully use indirection and be aware if the other components were dnl executed. Since other autoconf macros do not go to this trouble, dnl and almost no applications use sockets without the resolver, this dnl complexity has not been implemented. dnl dnl The check for libresolv is in case you are attempting to link dnl statically and happen to have a libresolv.a lying around (and no dnl libnsl.a). dnl AC_DEFUN(AC_LBL_LIBRARY_NET, [ # Most operating systems have gethostbyname() in the default searched # libraries (i.e. libc): # Some OSes (eg. Solaris) place it in libnsl # Some strange OSes (SINIX) have it in libsocket: AC_SEARCH_LIBS(gethostbyname, nsl socket resolv) # Unfortunately libsocket sometimes depends on libnsl and # AC_SEARCH_LIBS isn't up to the task of handling dependencies like this. if test "$ac_cv_search_gethostbyname" = "no" then AC_CHECK_LIB(socket, gethostbyname, LIBS="-lsocket -lnsl $LIBS", , -lnsl) fi AC_SEARCH_LIBS(socket, socket, , AC_CHECK_LIB(socket, socket, LIBS="-lsocket -lnsl $LIBS", , -lnsl)) # DLPI needs putmsg under HPUX so test for -lstr while we're at it AC_SEARCH_LIBS(putmsg, str) ]) dnl dnl Test for __attribute__ dnl AC_DEFUN(AC_C___ATTRIBUTE__, [ AC_MSG_CHECKING(for __attribute__) AC_CACHE_VAL(ac_cv___attribute__, [ AC_COMPILE_IFELSE( AC_LANG_SOURCE([[ #include static void foo(void) __attribute__ ((noreturn)); static void foo(void) { exit(1); } int main(int argc, char **argv) { foo(); } ]]), ac_cv___attribute__=yes, ac_cv___attribute__=no)]) if test "$ac_cv___attribute__" = "yes"; then AC_DEFINE(HAVE___ATTRIBUTE__, 1, [define if your compiler has __attribute__]) V_DEFS="$V_DEFS -D_U_=\"__attribute__((unused))\"" else V_DEFS="$V_DEFS -D_U_=\"\"" fi AC_MSG_RESULT($ac_cv___attribute__) ]) dnl dnl Checks to see if tpacket_stats is defined in linux/if_packet.h dnl If so then pcap-linux.c can use this to report proper statistics. dnl dnl -Scott Barron dnl AC_DEFUN(AC_LBL_TPACKET_STATS, [AC_MSG_CHECKING(if if_packet.h has tpacket_stats defined) AC_CACHE_VAL(ac_cv_lbl_tpacket_stats, AC_TRY_COMPILE([ # include ], [struct tpacket_stats stats], ac_cv_lbl_tpacket_stats=yes, ac_cv_lbl_tpacket_stats=no)) AC_MSG_RESULT($ac_cv_lbl_tpacket_stats) if test $ac_cv_lbl_tpacket_stats = yes; then AC_DEFINE(HAVE_TPACKET_STATS,1,[if if_packet.h has tpacket_stats defined]) fi])