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Be more strict when checking presence of fadvise, fix build for old glibc versions.

# aclocal.m4 generated automatically by aclocal 1.6.3 -*- Autoconf -*-

# Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002
# Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.

# 
# Generic macro, sets up all of the global packaging variables.
# The following environment variables may be set to override defaults:
#   DEBUG OPTIMIZER MALLOCLIB PLATFORM DISTRIBUTION INSTALL_USER INSTALL_GROUP
#   BUILD_VERSION
#
AC_DEFUN([AC_PACKAGE_GLOBALS],
  [ pkg_name="$1"
    AC_SUBST(pkg_name)

    . ./VERSION
    pkg_version=${PKG_MAJOR}.${PKG_MINOR}.${PKG_REVISION}
    AC_SUBST(pkg_version)
    pkg_release=$PKG_BUILD
    test -z "$BUILD_VERSION" || pkg_release="$BUILD_VERSION"
    AC_SUBST(pkg_release)

    DEBUG=${DEBUG:-'-DDEBUG'}		dnl  -DNDEBUG
    debug_build="$DEBUG"
    AC_SUBST(debug_build)

    OPTIMIZER=${OPTIMIZER:-'-g'}	dnl  -O2
    opt_build="$OPTIMIZER"
    AC_SUBST(opt_build)

    MALLOCLIB=${MALLOCLIB:-''}		dnl  /usr/lib/libefence.a
    malloc_lib="$MALLOCLIB"
    AC_SUBST(malloc_lib)

    PKG_USER=${INSTALL_USER:-'root'}
    pkg_user="$PKG_USER"
    AC_SUBST(pkg_user)

    PKG_GROUP=${INSTALL_GROUP:-'root'}
    pkg_group="$PKG_GROUP"
    AC_SUBST(pkg_group)

    pkg_distribution=`uname -s`
    test -z "$DISTRIBUTION" || pkg_distribution="$DISTRIBUTION"
    AC_SUBST(pkg_distribution)

    pkg_platform=`uname -s | tr 'A-Z' 'a-z' | sed -e 's/irix64/irix/'`
    test -z "$PLATFORM" || pkg_platform="$PLATFORM"
    AC_SUBST(pkg_platform)
  ])

#
# Check for specified utility (env var) - if unset, fail.
# 
AC_DEFUN([AC_PACKAGE_NEED_UTILITY],
  [ if test -z "$2"; then
        echo
        echo FATAL ERROR: $3 does not seem to be installed.
        echo $1 cannot be built without a working $4 installation.
        exit 1
    fi
  ])

#
# Generic macro, sets up all of the global build variables.
# The following environment variables may be set to override defaults:
#  CC MAKE LIBTOOL TAR ZIP MAKEDEPEND AWK SED ECHO SORT
#  MSGFMT MSGMERGE RPM
#
AC_DEFUN([AC_PACKAGE_UTILITIES],
  [ AC_PROG_CC
    cc="$CC"
    AC_SUBST(cc)
    AC_PACKAGE_NEED_UTILITY($1, "$cc", cc, [C compiler])

    if test -z "$MAKE"; then
        AC_PATH_PROG(MAKE, gmake,, /usr/bin:/usr/freeware/bin)
    fi
    if test -z "$MAKE"; then
        AC_PATH_PROG(MAKE, make,, /usr/bin)
    fi
    make=$MAKE
    AC_SUBST(make)
    AC_PACKAGE_NEED_UTILITY($1, "$make", make, [GNU make])

    if test -z "$LIBTOOL"; then
	AC_PATH_PROG(LIBTOOL, glibtool,, /usr/bin)
    fi
    if test -z "$LIBTOOL"; then
	AC_PATH_PROG(LIBTOOL, libtool,, /usr/bin:/usr/local/bin:/usr/freeware/bin)
    fi
    libtool=$LIBTOOL
    AC_SUBST(libtool)
    AC_PACKAGE_NEED_UTILITY($1, "$libtool", libtool, [GNU libtool])

    if test -z "$TAR"; then
        AC_PATH_PROG(TAR, tar,, /usr/freeware/bin:/bin:/usr/local/bin:/usr/bin)
    fi
    tar=$TAR
    AC_SUBST(tar)
    if test -z "$ZIP"; then
        AC_PATH_PROG(ZIP, gzip,, /bin:/usr/local/bin:/usr/freeware/bin)
    fi

    zip=$ZIP
    AC_SUBST(zip)

    if test -z "$MAKEDEPEND"; then
        AC_PATH_PROG(MAKEDEPEND, makedepend, /bin/true)
    fi
    makedepend=$MAKEDEPEND
    AC_SUBST(makedepend)

    if test -z "$AWK"; then
        AC_PATH_PROG(AWK, awk,, /bin:/usr/bin)
    fi
    awk=$AWK
    AC_SUBST(awk)

    if test -z "$SED"; then
        AC_PATH_PROG(SED, sed,, /bin:/usr/bin)
    fi
    sed=$SED
    AC_SUBST(sed)

    if test -z "$ECHO"; then
        AC_PATH_PROG(ECHO, echo,, /bin:/usr/bin)
    fi
    echo=$ECHO
    AC_SUBST(echo)

    if test -z "$SORT"; then
        AC_PATH_PROG(SORT, sort,, /bin:/usr/bin)
    fi
    sort=$SORT
    AC_SUBST(sort)

    dnl check if symbolic links are supported
    AC_PROG_LN_S

    if test "$enable_gettext" = yes; then
        if test -z "$MSGFMT"; then
                AC_PATH_PROG(MSGFMT, msgfmt,, /usr/bin:/usr/freeware/bin)
        fi
        msgfmt=$MSGFMT
        AC_SUBST(msgfmt)
        AC_PACKAGE_NEED_UTILITY($1, "$msgfmt", msgfmt, gettext)

        if test -z "$MSGMERGE"; then
                AC_PATH_PROG(MSGMERGE, msgmerge,, /usr/bin:/usr/freeware/bin)
        fi
        msgmerge=$MSGMERGE
        AC_SUBST(msgmerge)
        AC_PACKAGE_NEED_UTILITY($1, "$msgmerge", msgmerge, gettext)
    fi

    if test -z "$RPM"; then
        AC_PATH_PROG(RPM, rpm,, /bin:/usr/bin:/usr/freeware/bin)
    fi
    rpm=$RPM
    AC_SUBST(rpm)

    dnl .. and what version is rpm
    rpm_version=0
    test -x "$RPM" && rpm_version=`$RPM --version \
                        | awk '{print $NF}' | awk -F. '{V=1; print $V}'`
    AC_SUBST(rpm_version)
    dnl At some point in rpm 4.0, rpm can no longer build rpms, and
    dnl rpmbuild is needed (rpmbuild may go way back; not sure)
    dnl So, if rpm version >= 4.0, look for rpmbuild.  Otherwise build w/ rpm
    if test $rpm_version -ge 4; then
        AC_PATH_PROG(RPMBUILD, rpmbuild)
        rpmbuild=$RPMBUILD
    else
        rpmbuild=$RPM
    fi
    AC_SUBST(rpmbuild)
  ])

AC_DEFUN([AC_PACKAGE_NEED_UUID_H],
  [ AC_CHECK_HEADERS([uuid.h sys/uuid.h uuid/uuid.h])
    if test $ac_cv_header_uuid_h = no -a \
	    $ac_cv_header_sys_uuid_h = no -a \
	    $ac_cv_header_uuid_uuid_h = no; then
	echo
	echo 'FATAL ERROR: could not find a valid UUID header.'
	echo 'Install the Universally Unique Identifiers development package.'
	exit 1
    fi
  ])

AC_DEFUN([AC_PACKAGE_NEED_UUIDCOMPARE],
  [ AC_CHECK_FUNCS(uuid_compare)
    if test $ac_cv_func_uuid_compare = yes; then
	libuuid=""
    else
	AC_CHECK_LIB(uuid, uuid_compare,, [
	    echo
	    echo 'FATAL ERROR: could not find a valid UUID library.'
	    echo 'Install the Universally Unique Identifiers library package.'
	    exit 1])
	libuuid="-luuid"
    fi
    AC_SUBST(libuuid)
  ])

AC_DEFUN([AC_PACKAGE_NEED_PTHREAD_H],
  [ AC_CHECK_HEADERS(pthread.h)
    if test $ac_cv_header_pthread_h = no; then
	AC_CHECK_HEADERS(pthread.h,, [
	echo
	echo 'FATAL ERROR: could not find a valid pthread header.'
	exit 1])
    fi
  ])

AC_DEFUN([AC_PACKAGE_NEED_PTHREADMUTEXINIT],
  [ AC_CHECK_LIB(pthread, pthread_mutex_init,, [
	echo
	echo 'FATAL ERROR: could not find a valid pthread library.'
	exit 1
    ])
    libpthread=-lpthread
    AC_SUBST(libpthread)
  ])

# 
# Check if we have a working fadvise system call
# 
AC_DEFUN([AC_HAVE_FADVISE],
  [ AC_MSG_CHECKING([for fadvise ])
    AC_TRY_COMPILE([
#define _GNU_SOURCE
#define _FILE_OFFSET_BITS 64
#include <fcntl.h>
    ], [
	posix_fadvise(0, 1, 0, POSIX_FADV_NORMAL);
    ],	have_fadvise=yes
	AC_MSG_RESULT(yes),
	AC_MSG_RESULT(no))
    AC_SUBST(have_fadvise)
  ])

# 
# Check if we have a working madvise system call
# 
AC_DEFUN([AC_HAVE_MADVISE],
  [ AC_MSG_CHECKING([for madvise ])
    AC_TRY_COMPILE([
#define _GNU_SOURCE
#define _FILE_OFFSET_BITS 64
#include <sys/mman.h>
    ], [
	posix_madvise(0, 0, MADV_NORMAL);
    ],	have_madvise=yes
	AC_MSG_RESULT(yes),
	AC_MSG_RESULT(no))
    AC_SUBST(have_madvise)
  ])

# 
# Check if we have a working mincore system call
# 
AC_DEFUN([AC_HAVE_MINCORE],
  [ AC_MSG_CHECKING([for mincore ])
    AC_TRY_COMPILE([
#define _GNU_SOURCE
#define _FILE_OFFSET_BITS 64
#include <sys/mman.h>
    ], [
	mincore(0, 0, 0);
    ],	have_mincore=yes
	AC_MSG_RESULT(yes),
	AC_MSG_RESULT(no))
    AC_SUBST(have_mincore)
  ])

# 
# Check if we have a working sendfile system call
# 
AC_DEFUN([AC_HAVE_SENDFILE],
  [ AC_MSG_CHECKING([for sendfile ])
    AC_TRY_COMPILE([
#define _GNU_SOURCE
#define _FILE_OFFSET_BITS 64
#include <sys/sendfile.h>
    ], [
         sendfile(0, 0, 0, 0);
    ],	have_sendfile=yes
	AC_MSG_RESULT(yes),
	AC_MSG_RESULT(no))
    AC_SUBST(have_sendfile)
  ])

# 
# Check if we have a type for the pointer's size integer (__psint_t)
# 
AC_DEFUN([AC_TYPE_PSINT],
  [ AC_MSG_CHECKING([for __psint_t ])
    AC_TRY_COMPILE([
#include <sys/types.h>
#include <stdlib.h>
#include <stddef.h>
    ], [
         __psint_t  psint;
    ], AC_DEFINE(HAVE___PSINT_T) AC_MSG_RESULT(yes) , AC_MSG_RESULT(no))
  ])

# 
# Check if we have a type for the pointer's size unsigned (__psunsigned_t)
# 
AC_DEFUN([AC_TYPE_PSUNSIGNED],
  [ AC_MSG_CHECKING([for __psunsigned_t ])
    AC_TRY_COMPILE([
#include <sys/types.h>
#include <stdlib.h>
#include <stddef.h>
    ], [
        __psunsigned_t  psuint;
    ], AC_DEFINE(HAVE___PSUNSIGNED_T) AC_MSG_RESULT(yes) , AC_MSG_RESULT(no))
  ])

# 
# Check type sizes
# 
AC_DEFUN([AC_SIZEOF_POINTERS_AND_LONG],
  [ if test "$cross_compiling" = yes -a -z "$ac_cv_sizeof_long"; then
      AC_MSG_WARN([Cross compiling; assuming 32bit long and 32bit pointers])
    fi
    AC_CHECK_SIZEOF(long, 4)
    AC_CHECK_SIZEOF(char *, 4)
    if test $ac_cv_sizeof_long -eq 4 -o $ac_cv_sizeof_long -eq 0; then
      AC_DEFINE(HAVE_32BIT_LONG)
    fi
    if test $ac_cv_sizeof_long -eq 8; then
      AC_DEFINE(HAVE_64BIT_LONG)
    fi
    if test $ac_cv_sizeof_char_p -eq 4 -o $ac_cv_sizeof_char_p -eq 0; then
      AC_DEFINE(HAVE_32BIT_PTR)
    fi
    if test $ac_cv_sizeof_char_p -eq 8; then
      AC_DEFINE(HAVE_64BIT_PTR)
    fi
  ])

# 
# Find format of installed man pages.
# Always gzipped on Debian, but not Redhat pre-7.0.
# We don't deal with bzip2'd man pages, which Mandrake uses,
# someone will send us a patch sometime hopefully. :-)
# 
AC_DEFUN([AC_MANUAL_FORMAT],
  [ have_zipped_manpages=false
    for d in ${prefix}/share/man ${prefix}/man ; do
        if test -f $d/man1/man.1.gz
        then
            have_zipped_manpages=true
            break
        fi
    done
    AC_SUBST(have_zipped_manpages)
  ])