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freebsd/contrib/libpcap/acsite.m4
1997-05-27 00:01:12 +00:00

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dnl @(#) $Header: acsite.m4,v 1.41 96/11/29 15:30:40 leres Exp $ (LBL)
dnl
dnl Copyright (c) 1995, 1996
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 ac_cv_gcc_vers
dnl LBL_CFLAGS
dnl
dnl XXX need to add test to make sure ac_prog_cc hasn't been called
AC_DEFUN(AC_LBL_C_INIT,
[AC_PREREQ(2.12)
$1=-O
$2=""
if test "${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
AC_PROG_CC
if test $ac_cv_prog_gcc = yes ; then
if test "$SHLICC2" = yes ; then
ac_cv_gcc_vers=2
$1=-O2
else
AC_MSG_CHECKING(gcc version)
AC_CACHE_VAL(ac_cv_gcc_vers,
ac_cv_gcc_vers=`$CC -v 2>&1 | \
sed -n -e '$s/.* //' -e '$s/\..*//p'`)
AC_MSG_RESULT($ac_cv_gcc_vers)
if test $ac_cv_gcc_vers -gt 1 ; then
$1=-O2
fi
fi
else
AC_MSG_CHECKING(that $CC handles ansi prototypes)
AC_CACHE_VAL(ac_cv_cc_ansi_prototypes,
AC_TRY_COMPILE(
[#include <sys/types.h>],
[int frob(int, char *)],
ac_cv_cc_ansi_prototypes=yes,
ac_cv_cc_ansi_prototypes=no))
AC_MSG_RESULT($ac_cv_cc_ansi_prototypes)
if test $ac_cv_cc_ansi_prototypes = no ; then
case "$target_os" in
hpux*)
AC_MSG_CHECKING(for HP-UX ansi compiler ($CC -Aa -D_HPUX_SOURCE))
savedcflags="$CFLAGS"
CFLAGS="-Aa -D_HPUX_SOURCE $CFLAGS"
AC_CACHE_VAL(ac_cv_cc_hpux_cc_aa,
AC_TRY_COMPILE(
[#include <sys/types.h>],
[int frob(int, char *)],
ac_cv_cc_hpux_cc_aa=yes,
ac_cv_cc_hpux_cc_aa=no))
AC_MSG_RESULT($ac_cv_cc_hpux_cc_aa)
if test $ac_cv_cc_hpux_cc_aa = no ; then
AC_MSG_ERROR(see the INSTALL for more info)
fi
CFLAGS="$savedcflags"
V_CCOPT="-Aa $V_CCOPT"
AC_DEFINE(_HPUX_SOURCE)
;;
*)
AC_MSG_ERROR(see the INSTALL for more info)
;;
esac
fi
$2=-I/usr/local/include
case "$target_os" in
irix*)
V_CCOPT="$V_CCOPT -xansi -signed -g3"
;;
osf*)
V_CCOPT="$V_CCOPT -g3"
;;
ultrix*)
AC_MSG_CHECKING(that Ultrix $CC hacks const in prototypes)
AC_CACHE_VAL(ac_cv_cc_const_proto,
AC_TRY_COMPILE(
[#include <sys/types.h>],
[struct a { int b; };
void c(const struct a *)],
ac_cv_cc_const_proto=yes,
ac_cv_cc_const_proto=no))
AC_MSG_RESULT($ac_cv_cc_const_proto)
if test $ac_cv_cc_const_proto = no ; then
AC_DEFINE(const,)
fi
;;
esac
fi
])
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
AC_DEFUN(AC_LBL_LIBPCAP,
[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 $$2"
AC_MSG_RESULT($libpcap)
fi
LIBS="$libpcap $LIBS"])
dnl
dnl Define RETSIGTYPE and RETSIGVAL
dnl
dnl usage:
dnl
dnl AC_LBL_TYPE_SIGNAL
dnl
dnl results:
dnl
dnl RETSIGTYPE (defined)
dnl RETSIGVAL (defined)
dnl
AC_DEFUN(AC_LBL_TYPE_SIGNAL,
[AC_TYPE_SIGNAL
if test "$ac_cv_type_signal" = void ; then
AC_DEFINE(RETSIGVAL,)
else
AC_DEFINE(RETSIGVAL,(0))
fi
case "$target_os" in
irix*)
AC_DEFINE(_BSD_SIGNALS)
;;
*)
AC_CHECK_FUNCS(sigset)
if test $ac_cv_func_sigset = yes ; then
AC_DEFINE(signal, sigset)
fi
;;
esac])
dnl
dnl If using gcc, see if fixincludes should be run
dnl
dnl usage:
dnl
dnl AC_LBL_FIXINCLUDES
dnl
AC_DEFUN(AC_LBL_FIXINCLUDES,
[if test $ac_cv_prog_gcc = yes ; then
AC_MSG_CHECKING(if fixincludes is needed)
AC_CACHE_VAL(ac_cv_gcc_fixincludes,
AC_TRY_COMPILE(
[/*
* This generates a "duplicate case value" when fixincludes
* has not be run.
*/
# include <sys/types.h>
# include <sys/time.h>
# include <sys/ioctl.h>
# ifdef HAVE_SYS_IOCCOM_H
# include <sys/ioccom.h>
# endif],
[switch (0) {
case _IO('A', 1):;
case _IO('B', 1):;
}],
ac_cv_gcc_fixincludes=yes,
ac_cv_gcc_fixincludes=no))
AC_MSG_RESULT($ac_cv_gcc_fixincludes)
if test $ac_cv_gcc_fixincludes = no ; then
# Don't cache failure
unset ac_cv_gcc_fixincludes
AC_MSG_ERROR(see the INSTALL for more info)
fi
fi])
dnl
dnl Check for flex, default to lex
dnl Require flex 2.4 or higher
dnl Check for bison, default to yacc
dnl Default to lex/yacc if both flex and bison are not available
dnl Define the yy prefix string if using flex and bison
dnl
dnl usage:
dnl
dnl AC_LBL_LEX_AND_YACC(lex, yacc, yyprefix)
dnl
dnl results:
dnl
dnl $1 (lex set)
dnl $2 (yacc appended)
dnl $3 (optional flex and bison -P prefix)
dnl
AC_DEFUN(AC_LBL_LEX_AND_YACC,
[AC_CHECK_PROGS($1, flex, lex)
if test "$$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_flex_v24,
if flex -V >/dev/null 2>&1; then
ac_cv_flex_v24=yes
else
ac_cv_flex_v24=no
fi)
AC_MSG_RESULT($ac_cv_flex_v24)
if test $ac_cv_flex_v24 = no ; then
s="2.4 or higher required"
AC_MSG_WARN(ignoring obsolete flex executable ($s))
$1=lex
fi
fi
AC_CHECK_PROGS($2, bison, yacc)
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_union_wait,
AC_TRY_COMPILE([
# include <sys/types.h>
# include <sys/wait.h>],
[int status;
u_int i = WEXITSTATUS(status);
u_int j = waitpid(0, &status, 0);],
ac_cv_union_wait=no,
ac_cv_union_wait=yes))
AC_MSG_RESULT($ac_cv_union_wait)
if test $ac_cv_union_wait = yes ; then
AC_DEFINE(DECLWAITSTATUS,union wait)
else
AC_DEFINE(DECLWAITSTATUS,int)
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_sockaddr_has_sa_len,
AC_TRY_COMPILE([
# include <sys/types.h>
# include <sys/socket.h>],
[u_int i = sizeof(((struct sockaddr *)0)->sa_len)],
ac_cv_sockaddr_has_sa_len=yes,
ac_cv_sockaddr_has_sa_len=no))
AC_MSG_RESULT($ac_cv_sockaddr_has_sa_len)
if test $ac_cv_sockaddr_has_sa_len = yes ; then
AC_DEFINE(HAVE_SOCKADDR_SA_LEN)
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_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_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_have_run_path=yes
else
ac_cv_have_run_path=no
fi
rm -f conftest*])
AC_MSG_RESULT($ac_cv_have_run_path)
])
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_unaligned_fail,
[case "$target_cpu" in
alpha|hp*|mips|sparc)
ac_cv_unaligned_fail=yes
;;
*)
cat >conftest.c <<EOF
# include <sys/types.h>
# include <sys/wait.h>
# include <stdio.h>
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_unaligned_fail=yes
else
./conftest >conftest.out
if test ! -s conftest.out ; then
ac_cv_unaligned_fail=yes
else
ac_cv_unaligned_fail=no
fi
fi
rm -f conftest* core core.conftest
;;
esac])
AC_MSG_RESULT($ac_cv_unaligned_fail)
if test $ac_cv_unaligned_fail = yes ; then
AC_DEFINE(LBL_ALIGN)
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 $ac_cv_prog_gcc = yes -a -f .devel ; then
if test "${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_gcc_vers -gt 1 ; then
$1="$$1 -Wmissing-prototypes -Wstrict-prototypes"
fi
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)
else
AC_MSG_WARN(can't find $name)
fi
fi])