901 lines
25 KiB
Plaintext
901 lines
25 KiB
Plaintext
dnl @(#) $Header: /cvsroot/src/dist/libpcap/Attic/aclocal.m4,v 1.1.1.1 2006/02/27 15:45:40 drochner Exp $ (LBL)
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dnl
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dnl Copyright (c) 1995, 1996, 1997, 1998
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dnl The Regents of the University of California. All rights reserved.
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dnl
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dnl Redistribution and use in source and binary forms, with or without
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dnl modification, are permitted provided that: (1) source code distributions
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dnl retain the above copyright notice and this paragraph in its entirety, (2)
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dnl distributions including binary code include the above copyright notice and
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dnl this paragraph in its entirety in the documentation or other materials
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dnl provided with the distribution, and (3) all advertising materials mentioning
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dnl features or use of this software display the following acknowledgement:
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dnl ``This product includes software developed by the University of California,
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dnl Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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dnl the University nor the names of its contributors may be used to endorse
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dnl or promote products derived from this software without specific prior
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dnl written permission.
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dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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dnl WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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dnl
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dnl LBL autoconf macros
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dnl
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dnl
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dnl Determine which compiler we're using (cc or gcc)
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dnl If using gcc, determine the version number
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dnl If using cc, require that it support ansi prototypes
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dnl If using gcc, use -O2 (otherwise use -O)
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dnl If using cc, explicitly specify /usr/local/include
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dnl
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dnl usage:
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dnl
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dnl AC_LBL_C_INIT(copt, incls)
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dnl
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dnl results:
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dnl
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dnl $1 (copt set)
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dnl $2 (incls set)
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dnl CC
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dnl LDFLAGS
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dnl ac_cv_lbl_gcc_vers
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dnl LBL_CFLAGS
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dnl
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AC_DEFUN(AC_LBL_C_INIT,
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[AC_PREREQ(2.12)
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AC_BEFORE([$0], [AC_PROG_CC])
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AC_BEFORE([$0], [AC_LBL_FIXINCLUDES])
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AC_BEFORE([$0], [AC_LBL_DEVEL])
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AC_ARG_WITH(gcc, [ --without-gcc don't use gcc])
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$1="-O"
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$2=""
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if test "${srcdir}" != "." ; then
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$2="-I\$(srcdir)"
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fi
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if test "${CFLAGS+set}" = set; then
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LBL_CFLAGS="$CFLAGS"
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fi
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if test -z "$CC" ; then
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case "$target_os" in
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bsdi*)
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AC_CHECK_PROG(SHLICC2, shlicc2, yes, no)
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if test $SHLICC2 = yes ; then
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CC=shlicc2
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export CC
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fi
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;;
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esac
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fi
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if test -z "$CC" -a "$with_gcc" = no ; then
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CC=cc
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export CC
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fi
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AC_PROG_CC
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if test "$GCC" = yes ; then
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if test "$SHLICC2" = yes ; then
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ac_cv_lbl_gcc_vers=2
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$1="-O2"
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else
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AC_MSG_CHECKING(gcc version)
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AC_CACHE_VAL(ac_cv_lbl_gcc_vers,
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ac_cv_lbl_gcc_vers=`$CC -v 2>&1 | \
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sed -e '/^gcc version /!d' \
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-e 's/^gcc version //' \
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-e 's/ .*//' -e 's/^[[[^0-9]]]*//' \
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-e 's/\..*//'`)
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AC_MSG_RESULT($ac_cv_lbl_gcc_vers)
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if test $ac_cv_lbl_gcc_vers -gt 1 ; then
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$1="-O2"
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fi
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fi
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else
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AC_MSG_CHECKING(that $CC handles ansi prototypes)
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AC_CACHE_VAL(ac_cv_lbl_cc_ansi_prototypes,
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AC_TRY_COMPILE(
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[#include <sys/types.h>],
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[int frob(int, char *)],
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ac_cv_lbl_cc_ansi_prototypes=yes,
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ac_cv_lbl_cc_ansi_prototypes=no))
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AC_MSG_RESULT($ac_cv_lbl_cc_ansi_prototypes)
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if test $ac_cv_lbl_cc_ansi_prototypes = no ; then
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case "$target_os" in
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hpux*)
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AC_MSG_CHECKING(for HP-UX ansi compiler ($CC -Aa -D_HPUX_SOURCE))
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savedcflags="$CFLAGS"
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CFLAGS="-Aa -D_HPUX_SOURCE $CFLAGS"
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AC_CACHE_VAL(ac_cv_lbl_cc_hpux_cc_aa,
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AC_TRY_COMPILE(
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[#include <sys/types.h>],
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[int frob(int, char *)],
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ac_cv_lbl_cc_hpux_cc_aa=yes,
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ac_cv_lbl_cc_hpux_cc_aa=no))
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AC_MSG_RESULT($ac_cv_lbl_cc_hpux_cc_aa)
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if test $ac_cv_lbl_cc_hpux_cc_aa = no ; then
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AC_MSG_ERROR(see the INSTALL doc for more info)
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fi
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CFLAGS="$savedcflags"
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V_CCOPT="-Aa $V_CCOPT"
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AC_DEFINE(_HPUX_SOURCE,1,[needed on HP-UX])
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;;
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*)
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AC_MSG_ERROR(see the INSTALL doc for more info)
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;;
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esac
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fi
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$2="$$2 -I/usr/local/include"
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LDFLAGS="$LDFLAGS -L/usr/local/lib"
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case "$target_os" in
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irix*)
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V_CCOPT="$V_CCOPT -xansi -signed -g3"
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;;
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osf*)
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V_CCOPT="$V_CCOPT -std1 -g3"
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;;
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ultrix*)
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AC_MSG_CHECKING(that Ultrix $CC hacks const in prototypes)
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AC_CACHE_VAL(ac_cv_lbl_cc_const_proto,
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AC_TRY_COMPILE(
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[#include <sys/types.h>],
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[struct a { int b; };
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void c(const struct a *)],
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ac_cv_lbl_cc_const_proto=yes,
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ac_cv_lbl_cc_const_proto=no))
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AC_MSG_RESULT($ac_cv_lbl_cc_const_proto)
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if test $ac_cv_lbl_cc_const_proto = no ; then
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AC_DEFINE(const,)
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fi
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;;
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esac
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fi
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])
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#
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# Try compiling a sample of the type of code that appears in
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# gencode.c with "inline", "__inline__", and "__inline".
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#
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# Autoconf's AC_C_INLINE, at least in autoconf 2.13, isn't good enough,
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# as it just tests whether a function returning "int" can be inlined;
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# at least some versions of HP's C compiler can inline that, but can't
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# inline a function that returns a struct pointer.
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#
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# Make sure we use the V_CCOPT flags, because some of those might
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# disable inlining.
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#
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AC_DEFUN(AC_LBL_C_INLINE,
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[AC_MSG_CHECKING(for inline)
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save_CFLAGS="$CFLAGS"
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CFLAGS="$V_CCOPT"
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AC_CACHE_VAL(ac_cv_lbl_inline, [
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ac_cv_lbl_inline=""
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ac_lbl_cc_inline=no
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for ac_lbl_inline in inline __inline__ __inline
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do
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AC_TRY_COMPILE(
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[#define inline $ac_lbl_inline
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static inline struct iltest *foo(void);
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struct iltest {
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int iltest1;
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int iltest2;
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};
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static inline struct iltest *
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foo()
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{
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static struct iltest xxx;
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return &xxx;
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}],,ac_lbl_cc_inline=yes,)
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if test "$ac_lbl_cc_inline" = yes ; then
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break;
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fi
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done
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if test "$ac_lbl_cc_inline" = yes ; then
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ac_cv_lbl_inline=$ac_lbl_inline
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fi])
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CFLAGS="$save_CFLAGS"
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if test ! -z "$ac_cv_lbl_inline" ; then
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AC_MSG_RESULT($ac_cv_lbl_inline)
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else
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AC_MSG_RESULT(no)
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fi
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AC_DEFINE_UNQUOTED(inline, $ac_cv_lbl_inline, [Define as token for inline if inlining supported])])
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dnl
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dnl Use pfopen.c if available and pfopen() not in standard libraries
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dnl Require libpcap
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dnl Look for libpcap in ..
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dnl Use the installed libpcap if there is no local version
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dnl
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dnl usage:
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dnl
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dnl AC_LBL_LIBPCAP(pcapdep, incls)
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dnl
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dnl results:
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dnl
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dnl $1 (pcapdep set)
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dnl $2 (incls appended)
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dnl LIBS
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dnl LBL_LIBS
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dnl
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AC_DEFUN(AC_LBL_LIBPCAP,
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[AC_REQUIRE([AC_LBL_LIBRARY_NET])
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dnl
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dnl save a copy before locating libpcap.a
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dnl
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LBL_LIBS="$LIBS"
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pfopen=/usr/examples/packetfilter/pfopen.c
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if test -f $pfopen ; then
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AC_CHECK_FUNCS(pfopen)
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if test $ac_cv_func_pfopen = "no" ; then
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AC_MSG_RESULT(Using $pfopen)
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LIBS="$LIBS $pfopen"
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fi
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fi
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AC_MSG_CHECKING(for local pcap library)
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libpcap=FAIL
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lastdir=FAIL
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places=`ls .. | sed -e 's,/$,,' -e 's,^,../,' | \
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egrep '/libpcap-[[0-9]]*\.[[0-9]]*(\.[[0-9]]*)?([[ab]][[0-9]]*)?$'`
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for dir in $places ../libpcap libpcap ; do
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basedir=`echo $dir | sed -e 's/[[ab]][[0-9]]*$//'`
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if test $lastdir = $basedir ; then
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dnl skip alphas when an actual release is present
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continue;
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fi
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lastdir=$dir
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if test -r $dir/pcap.c ; then
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libpcap=$dir/libpcap.a
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d=$dir
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dnl continue and select the last one that exists
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fi
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done
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if test $libpcap = FAIL ; then
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AC_MSG_RESULT(not found)
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AC_CHECK_LIB(pcap, main, libpcap="-lpcap")
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if test $libpcap = FAIL ; then
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AC_MSG_ERROR(see the INSTALL doc for more info)
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fi
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else
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$1=$libpcap
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$2="-I$d $$2"
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AC_MSG_RESULT($libpcap)
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fi
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LIBS="$libpcap $LIBS"
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case "$target_os" in
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aix*)
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pseexe="/lib/pse.exp"
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AC_MSG_CHECKING(for $pseexe)
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if test -f $pseexe ; then
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AC_MSG_RESULT(yes)
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LIBS="$LIBS -I:$pseexe"
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fi
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;;
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esac])
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dnl
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dnl Define RETSIGTYPE and RETSIGVAL
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dnl
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dnl usage:
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dnl
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dnl AC_LBL_TYPE_SIGNAL
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dnl
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dnl results:
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dnl
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dnl RETSIGTYPE (defined)
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dnl RETSIGVAL (defined)
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dnl
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AC_DEFUN(AC_LBL_TYPE_SIGNAL,
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[AC_BEFORE([$0], [AC_LBL_LIBPCAP])
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AC_TYPE_SIGNAL
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if test "$ac_cv_type_signal" = void ; then
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AC_DEFINE(RETSIGVAL,[],[return value of signal handlers])
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else
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AC_DEFINE(RETSIGVAL,(0),[return value of signal handlers])
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fi
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case "$target_os" in
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irix*)
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AC_DEFINE(_BSD_SIGNALS,1,[get BSD semantics on Irix])
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;;
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*)
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dnl prefer sigset() to sigaction()
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AC_CHECK_FUNCS(sigset)
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if test $ac_cv_func_sigset = no ; then
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AC_CHECK_FUNCS(sigaction)
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fi
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;;
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esac])
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dnl
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dnl If using gcc, make sure we have ANSI ioctl definitions
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dnl
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dnl usage:
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dnl
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dnl AC_LBL_FIXINCLUDES
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dnl
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AC_DEFUN(AC_LBL_FIXINCLUDES,
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[if test "$GCC" = yes ; then
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AC_MSG_CHECKING(for ANSI ioctl definitions)
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AC_CACHE_VAL(ac_cv_lbl_gcc_fixincludes,
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AC_TRY_COMPILE(
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[/*
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* This generates a "duplicate case value" when fixincludes
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* has not be run.
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*/
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# include <sys/types.h>
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# include <sys/time.h>
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# include <sys/ioctl.h>
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# ifdef HAVE_SYS_IOCCOM_H
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# include <sys/ioccom.h>
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# endif],
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[switch (0) {
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case _IO('A', 1):;
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case _IO('B', 1):;
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}],
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ac_cv_lbl_gcc_fixincludes=yes,
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ac_cv_lbl_gcc_fixincludes=no))
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AC_MSG_RESULT($ac_cv_lbl_gcc_fixincludes)
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if test $ac_cv_lbl_gcc_fixincludes = no ; then
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# Don't cache failure
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unset ac_cv_lbl_gcc_fixincludes
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AC_MSG_ERROR(see the INSTALL for more info)
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fi
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fi])
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dnl
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dnl Check for flex, default to lex
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dnl Require flex 2.4 or higher
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dnl Check for bison, default to yacc
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dnl Default to lex/yacc if both flex and bison are not available
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dnl Define the yy prefix string if using flex and bison
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dnl
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dnl usage:
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dnl
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dnl AC_LBL_LEX_AND_YACC(lex, yacc, yyprefix)
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dnl
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dnl results:
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dnl
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dnl $1 (lex set)
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dnl $2 (yacc appended)
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dnl $3 (optional flex and bison -P prefix)
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dnl
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AC_DEFUN(AC_LBL_LEX_AND_YACC,
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[AC_ARG_WITH(flex, [ --without-flex don't use flex])
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AC_ARG_WITH(bison, [ --without-bison don't use bison])
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if test "$with_flex" = no ; then
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$1=lex
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else
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AC_CHECK_PROGS($1, flex, lex)
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fi
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if test "$$1" = flex ; then
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# The -V flag was added in 2.4
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AC_MSG_CHECKING(for flex 2.4 or higher)
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AC_CACHE_VAL(ac_cv_lbl_flex_v24,
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if flex -V >/dev/null 2>&1; then
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ac_cv_lbl_flex_v24=yes
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else
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ac_cv_lbl_flex_v24=no
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fi)
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AC_MSG_RESULT($ac_cv_lbl_flex_v24)
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if test $ac_cv_lbl_flex_v24 = no ; then
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s="2.4 or higher required"
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AC_MSG_WARN(ignoring obsolete flex executable ($s))
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$1=lex
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fi
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fi
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if test "$with_bison" = no ; then
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$2=yacc
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else
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AC_CHECK_PROGS($2, bison, yacc)
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fi
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if test "$$2" = bison ; then
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$2="$$2 -y"
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fi
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if test "$$1" != lex -a "$$2" = yacc -o "$$1" = lex -a "$$2" != yacc ; then
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AC_MSG_WARN(don't have both flex and bison; reverting to lex/yacc)
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$1=lex
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$2=yacc
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fi
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|
if test "$$1" = flex -a -n "$3" ; then
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$1="$$1 -P$3"
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$2="$$2 -p $3"
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fi])
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dnl
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dnl Checks to see if union wait is used with WEXITSTATUS()
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dnl
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dnl usage:
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dnl
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dnl AC_LBL_UNION_WAIT
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dnl
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|
dnl results:
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dnl
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dnl DECLWAITSTATUS (defined)
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dnl
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AC_DEFUN(AC_LBL_UNION_WAIT,
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[AC_MSG_CHECKING(if union wait is used)
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AC_CACHE_VAL(ac_cv_lbl_union_wait,
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AC_TRY_COMPILE([
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|
# include <sys/types.h>
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|
# include <sys/wait.h>],
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[int status;
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|
u_int i = WEXITSTATUS(status);
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u_int j = waitpid(0, &status, 0);],
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|
ac_cv_lbl_union_wait=no,
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|
ac_cv_lbl_union_wait=yes))
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|
AC_MSG_RESULT($ac_cv_lbl_union_wait)
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|
if test $ac_cv_lbl_union_wait = yes ; then
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AC_DEFINE(DECLWAITSTATUS,union wait,[type for wait])
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|
else
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|
AC_DEFINE(DECLWAITSTATUS,int,[type for wait])
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|
fi])
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dnl
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dnl Checks to see if the sockaddr struct has the 4.4 BSD sa_len member
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dnl
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dnl usage:
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dnl
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dnl AC_LBL_SOCKADDR_SA_LEN
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dnl
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|
dnl results:
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dnl
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|
dnl HAVE_SOCKADDR_SA_LEN (defined)
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dnl
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AC_DEFUN(AC_LBL_SOCKADDR_SA_LEN,
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[AC_MSG_CHECKING(if sockaddr struct has sa_len member)
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AC_CACHE_VAL(ac_cv_lbl_sockaddr_has_sa_len,
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|
AC_TRY_COMPILE([
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|
# include <sys/types.h>
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|
# include <sys/socket.h>],
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[u_int i = sizeof(((struct sockaddr *)0)->sa_len)],
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ac_cv_lbl_sockaddr_has_sa_len=yes,
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ac_cv_lbl_sockaddr_has_sa_len=no))
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AC_MSG_RESULT($ac_cv_lbl_sockaddr_has_sa_len)
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|
if test $ac_cv_lbl_sockaddr_has_sa_len = yes ; then
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AC_DEFINE(HAVE_SOCKADDR_SA_LEN,1,[if struct sockaddr has sa_len])
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fi])
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dnl
|
|
dnl Checks to see if there's a sockaddr_storage structure
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dnl
|
|
dnl usage:
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dnl
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dnl AC_LBL_SOCKADDR_STORAGE
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dnl
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|
dnl results:
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dnl
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dnl HAVE_SOCKADDR_STORAGE (defined)
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dnl
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AC_DEFUN(AC_LBL_SOCKADDR_STORAGE,
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[AC_MSG_CHECKING(if sockaddr_storage struct exists)
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AC_CACHE_VAL(ac_cv_lbl_has_sockaddr_storage,
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|
AC_TRY_COMPILE([
|
|
# include <sys/types.h>
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|
# include <sys/socket.h>],
|
|
[u_int i = sizeof (struct sockaddr_storage)],
|
|
ac_cv_lbl_has_sockaddr_storage=yes,
|
|
ac_cv_lbl_has_sockaddr_storage=no))
|
|
AC_MSG_RESULT($ac_cv_lbl_has_sockaddr_storage)
|
|
if test $ac_cv_lbl_has_sockaddr_storage = yes ; then
|
|
AC_DEFINE(HAVE_SOCKADDR_STORAGE,1,[if struct sockaddr_storage exists])
|
|
fi])
|
|
|
|
dnl
|
|
dnl Checks to see if the dl_hp_ppa_info_t struct has the HP-UX 11.00
|
|
dnl dl_module_id_1 member
|
|
dnl
|
|
dnl usage:
|
|
dnl
|
|
dnl AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1
|
|
dnl
|
|
dnl results:
|
|
dnl
|
|
dnl HAVE_HP_PPA_INFO_T_DL_MODULE_ID_1 (defined)
|
|
dnl
|
|
dnl NOTE: any compile failure means we conclude that it doesn't have
|
|
dnl that member, so if we don't have DLPI, don't have a <sys/dlpi_ext.h>
|
|
dnl header, or have one that doesn't declare a dl_hp_ppa_info_t type,
|
|
dnl we conclude it doesn't have that member (which is OK, as either we
|
|
dnl won't be using code that would use that member, or we wouldn't
|
|
dnl compile in any case).
|
|
dnl
|
|
AC_DEFUN(AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1,
|
|
[AC_MSG_CHECKING(if dl_hp_ppa_info_t struct has dl_module_id_1 member)
|
|
AC_CACHE_VAL(ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1,
|
|
AC_TRY_COMPILE([
|
|
# include <sys/types.h>
|
|
# include <sys/dlpi.h>
|
|
# include <sys/dlpi_ext.h>],
|
|
[u_int i = sizeof(((dl_hp_ppa_info_t *)0)->dl_module_id_1)],
|
|
ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1=yes,
|
|
ac_cv_lbl_dl_hp_ppa_info_t_has_dl_module_id_1=no))
|
|
AC_MSG_RESULT($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 <sys/types.h>
|
|
# if STDC_HEADERS
|
|
# include <stdlib.h>
|
|
# include <stddef.h>
|
|
# 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 <<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 $LIBS >/dev/null 2>&1
|
|
if test ! -x conftest ; then
|
|
dnl failed to compile for some reason
|
|
ac_cv_lbl_unaligned_fail=yes
|
|
else
|
|
./conftest >conftest.out
|
|
if test ! -s conftest.out ; then
|
|
ac_cv_lbl_unaligned_fail=yes
|
|
else
|
|
ac_cv_lbl_unaligned_fail=no
|
|
fi
|
|
fi
|
|
rm -f conftest* core core.conftest
|
|
;;
|
|
esac])
|
|
AC_MSG_RESULT($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 $LIBS", , -lnsl))
|
|
# DLPI needs putmsg under HPUX so test for -lstr while we're at it
|
|
AC_SEARCH_LIBS(putmsg, str)
|
|
])
|
|
|
|
dnl
|
|
dnl Test for __attribute__
|
|
dnl
|
|
|
|
AC_DEFUN(AC_C___ATTRIBUTE__, [
|
|
AC_MSG_CHECKING(for __attribute__)
|
|
AC_CACHE_VAL(ac_cv___attribute__, [
|
|
AC_COMPILE_IFELSE(
|
|
AC_LANG_SOURCE([[
|
|
#include <stdlib.h>
|
|
|
|
static void foo(void) __attribute__ ((noreturn));
|
|
|
|
static void
|
|
foo(void)
|
|
{
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
foo();
|
|
}
|
|
]]),
|
|
ac_cv___attribute__=yes,
|
|
ac_cv___attribute__=no)])
|
|
if test "$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($ac_cv___attribute__)
|
|
])
|
|
|
|
dnl
|
|
dnl Checks to see if tpacket_stats is defined in linux/if_packet.h
|
|
dnl If so then pcap-linux.c can use this to report proper statistics.
|
|
dnl
|
|
dnl -Scott Barron
|
|
dnl
|
|
AC_DEFUN(AC_LBL_TPACKET_STATS,
|
|
[AC_MSG_CHECKING(if if_packet.h has tpacket_stats defined)
|
|
AC_CACHE_VAL(ac_cv_lbl_tpacket_stats,
|
|
AC_TRY_COMPILE([
|
|
# include <linux/if_packet.h>],
|
|
[struct tpacket_stats stats],
|
|
ac_cv_lbl_tpacket_stats=yes,
|
|
ac_cv_lbl_tpacket_stats=no))
|
|
AC_MSG_RESULT($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])
|