dnl Process this file with autoconf to produce a configure script.
#
# This autoconfigure input was taken from  GNU fileutils  configure.in,
# and modified by hand by <matti.aarnio@nic.funet.fi>  for the ZMailer
#
# Parts are also from scotty-2.0.2 configuration
# Parts from other sources long forgotten, and many
# new things invented by myself...
#
# ZMailer is almoast as versatile systems feature tester as
# the best (or worst) other beats, like  SSH ...   About the
# only thing that ZMailer does not need are PTY allocation
# mechanisms ...
#

AC_INIT(router/router.c)
ac_default_zmconfig=${ZCONFIG-"/etc/zmailer.conf"}
AC_CONFIG_HEADER(config.h)

if test "$prefix" = "NONE" ; then
  AC_MSG_RESULT([!!!])
  AC_MSG_RESULT([!!! You did not define  --prefix=DIR  -parameter !!!])
  AC_MSG_RESULT([!!!])
  AC_MSG_RESULT([!!! Define the  --prefix=DIR -parameter to tell the subtree,])
  AC_MSG_RESULT([!!! where the ZMailer system is to be installed.])
  AC_MSG_RESULT([!!!])
  exit 1
fi

AC_MSG_RESULT([***])
AC_MSG_RESULT([*** You can set  ZCONFIG  environment variable to define])
AC_MSG_RESULT([*** the location of the (default) /etc/zmailer.conf -file])
AC_MSG_RESULT([*** (You can use also   --with-zconfig=  -parameter)])
AC_MSG_RESULT([***])
AC_MSG_RESULT([*** Consider also setting following parameters:])
AC_MSG_RESULT([***   --mandir=DIR     -- for man-pages])
AC_MSG_RESULT([***   --libdir=DIR     -- for libzmailer(3)])
AC_MSG_RESULT([***   --includedir=DIR -- for libzmailer(3)])
AC_MSG_RESULT([*** (They can be outside the --prefix=DIR -tree)])
AC_MSG_RESULT([***])
AC_MSG_RESULT([*** You can set CC, and CFLAGS  environment variables to])
AC_MSG_RESULT([*** choose the C-compiler, and its options, especially at])
AC_MSG_RESULT([*** systems where there are multiple choices to use...])
AC_MSG_RESULT([***])

sleep 3  # delay a bit, then continue..

AC_PROG_MAKE_SET

# -- From  GNU fileutils 3.13..
# PACKAGE=ZMailer
# VERSION=2.99.35
# PACKAGE_VERSION="GNU $PACKAGE-$VERSION"
# AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE")
# AC_DEFINE_UNQUOTED(VERSION, "$VERSION")
# AC_DEFINE_UNQUOTED(PACKAGE_VERSION, "$PACKAGE_VERSION")
# AC_SUBST(PACKAGE)
# AC_SUBST(VERSION)
# AC_SUBST(PACKAGE_VERSION)


#----------------------------------------------------------------------------
#       Check if we should use gcc if available on this machine.
#----------------------------------------------------------------------------

AC_ARG_WITH(gcc, [  --with-gcc              use gcc for compilation],
	use_gcc=1)
if test -z "$use_gcc" ; then
    CC=${CC-cc}
else
    AC_PROG_CC
    if test "$CC" = "gcc" ; then
	CC="gcc -Wall"
    fi
fi

AC_SUBST(PROGS)dnl

AC_PATH_PROG(LN, ln, ln)dnl
AC_PATH_PROG(MV, mv, mv)dnl
AC_PATH_PROG(RM, rm, rm)dnl
AC_PATH_PROG(PERL, perl, perl)dnl
AC_SUBST(LIBPROGS)dnl
AC_PROG_CC
AC_PROG_CPP
AC_PROG_GCC_TRADITIONAL

AC_SUBST(CPPDEP)
CPPDEP=${CPPDEP-"gcc -MM"}

AC_MSG_RESULT([** Using C compiler: $CC])
AC_MSG_RESULT([** Using CFLAGS:     $CFLAGS])
AC_MSG_RESULT([** Using CPPDEP:     $CPPDEP])

AC_PROG_INSTALL
AC_PROG_RANLIB
AC_PATH_PROG(AR, ar, ar)dnl
AC_PATH_PROG(LD, ld, ld)dnl
AC_PROG_YACC
AC_PROG_LN_S
AC_AIX
AC_MINIX
AC_ISC_POSIX
AC_HEADER_MAJOR

AC_C_BIGENDIAN
AC_C_INLINE
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(double)

AC_SUBST(ZMAILERCFGFILE)
use_zcfg=0
AC_ARG_WITH(zconfig, 
[  --with-zconfig=PATH     define the path and name of the zmailer.conf -file
                          Set ZCONFIG environment, and then use --with-zconfig=no
                          to disable usage of existing zmailer.conf -file to
                          load existing defaults. ],
	use_zcfg=1)
if test "$use_zcfg" = "0" ; then
	ZMAILERCFGFILE=${ZMAILERCFGFILE-$ac_default_zmconfig}
else
    if test "$withval" != "no" ; then
	use_zcfg=1
	ZMAILERCFGFILE="$withval"
    else
	use_zcfg=0
	ZMAILERCFGFILE=${ZMAILERCFGFILE-$ac_default_zmconfig}
    fi
fi
AC_MSG_RESULT([Using ZMailer parametrization file path: $ZMAILERCFGFILE])

if test -r $ZMAILERCFGFILE -a "$use_zcfg" != "0" ; then
  # Source the previous configuration values for various environment parameters
  . $ZMAILERCFGFILE
  AC_MSG_RESULT([   The file exists, we use its values as defaults])
fi

AC_SUBST(MAILBOX)
AC_ARG_WITH(mailbox,      [  --with-mailbox=DIR      define the path of the mailbox directory],
	use_mailbox=1)
if test -z "$use_mailbox" ; then
    # No explicite value given, make some guesses as to where it might be..
    for DEFMAILBOX in /var/mail /var/spool/mail /usr/mail /usr/spool/mail
    do
	if test -d $DEFMAILBOX ; then
	    break
	fi
    done
    MAILBOX=${MAILBOX-$DEFMAILBOX}
else
    MAILBOX="$withval"
fi
AC_MSG_RESULT([Using ZMailer MAILBOX directory path: $MAILBOX])

AC_SUBST(POSTOFFICE)
AC_ARG_WITH(postoffice,   [  --with-postoffice=DIR   define the path of the postoffice directory],
	use_postoffice=1)
if test -z "$use_postoffice" ; then
    # No explicite value given, make some guesses as to where it might be..
    # XX: Should see what the MAILBOX value is, and then default between
    # XX: the /usr, and the /var -trees.
    for DEFPOSTOFFICE  in /usr/spool/postoffice /var/spool/postoffice
    do
	if test -d $DEFPOSTOFFICE ; then
	    break
	fi
    done
    POSTOFFICE=${POSTOFFICE-$DEFPOSTOFFICE}
else
    POSTOFFICE="$withval"
fi
AC_MSG_RESULT([Using ZMailer POSTOFFICE path: $POSTOFFICE])


AC_SUBST(MAILSHARE)
AC_ARG_WITH(mailshare,    [  --with-mailshare=DIR    define the path of the mailshare directory],
	use_mailshare=1)
if test -z "$use_mailshare" ; then
    eval MAILSHARE=${MAILSHARE-$prefix}
else
    MAILSHARE="$withval"
fi
AC_MSG_RESULT([Using ZMailer MAILSHARE directory path: $MAILSHARE])

AC_SUBST(MAILVAR)
AC_ARG_WITH(mailvar,      [  --with-mailvar=DIR      define the path of the mailvar directory],
	use_mailvar=1)
if test -z "$use_mailvar" ; then
    eval MAILVAR=${MAILVAR-$prefix}
else
    MAILVAR="$withval"
fi
AC_MSG_RESULT([Using ZMailer MAILVAR directory path: $MAILVAR])

AC_SUBST(MAILBIN)
AC_ARG_WITH(mailbin,      [  --with-mailbin=DIR      define the path of the mailbin directory],
	use_mailbin=1)
if test -z "$use_mailbin" ; then
    eval MAILBIN=${MAILBIN-$MAILSHARE/bin}
else
    MAILBIN="$withval"
fi
AC_MSG_RESULT([Using ZMailer MAILBIN directory path: $MAILBIN])

AC_SUBST(LOGDIR)
AC_ARG_WITH(logdir,       [  --with-logdir=DIR       define the path of the log directory],
	use_logdir=1)
if test -z "$use_logdir" ; then
    LOGDIR=${LOGDIR-/var/log/mail}
else
    LOGDIR="$withval"
fi
AC_MSG_RESULT([Using ZMailer LOGDIR directory path: $LOGDIR])

AC_SUBST(NNTPSERVER)
AC_ARG_WITH(nntpserver,   [  --with-nntpserver=HOST  define the domain name of the nntp server],
	use_nntpserver=1)
if test -z "$use_nntpserver" ; then
    NNTPSERVER=${NNTPSERVER-nntp}
else
    NNTPSERVER="$withval"
fi
AC_PATH_PROG(INEWS, inews, inews)
AC_MSG_RESULT([Using ZMailer NNTPSERVER host name: $NNTPSERVER])
AC_MSG_RESULT([Using ZMailer INEWS program path: $INEWS])

AC_SUBST(LIBMALLOC)
AC_SUBST(MALLOC)
AC_SUBST(MALLOCEXT)
MALLOCEXT=""
AC_ARG_WITH(system-malloc,[  --with-system-malloc    use system malloc instead of our own],
	use_system_malloc=1)
AC_ARG_WITH(libmalloc,
[  --with-libmalloc=LIBNAME define the name of the malloc library
                          possible values: system, malloc_d, malloc (default)],
	use_libmalloc=1)
if test "x$use_system_malloc" = x1 ; then
  LIBMALLOC=""
  MALLOC="system"
else
  if test "x$withval" = xsystem ; then
    LIBMALLOC=""
    MALLOC="system"
  else
    if test "x$withval" = xmalloc_d -o "x$withval" = xmalloc ; then
      LIBMALLOC="-l$withval"
      MALLOC="$withval"
      if text "$withval" = "malloc_d" ; then
	MALLOCEXT="_d"
      fi
    else
      eval LIBMALLOC="-l${MALLOC-malloc}"
      if test "x$LIBMALLOC" = "x-lmalloc_d"; then
	MALLOC="malloc_d"; MALLOCEXT="_d"
      else
	if test "x$LIBMALLOC" = "x-lmalloc"; then
	  MALLOC="malloc"
	fi
      fi
    fi
  fi
fi
AC_MSG_RESULT([Using ZMailer malloc library of type: $MALLOC])


AC_SUBST(SENDMAILPATH)
AC_ARG_WITH(sendmailpath,   [  --with-sendmailpath=PATH The location of the 'sendmail'],
	use_sendmailpath=1)
if test -z "$use_sendmailpath" ; then
  # Ok, no value given, make some guesses; /usr/sbin ??
  for SENDMAILDEF in /usr/sbin/sendmail /usr/lib/sendmail ; do
    if test -x $SENDMAILDEF ; then
	break
    fi
  done
  SENDMAILPATH="${SENDMAILPATH-$SENDMAILDEF}"
else
    SENDMAILPATH="$withval"
fi
AC_MSG_RESULT([Using ZMailer SENDMAILPATH: $SENDMAILPATH])

AC_SUBST(RMAILPATH)
AC_ARG_WITH(rmailpath,   [  --with-rmailpath=PATH    The location of 'rmail'],
	use_rmailpath=1)
if test -z "$use_rmailpath" ; then
  # Ok, no value given, make some guesses; /usr/bin ?? (last is default)
  for RMAILDEF in /sbin/rmail /usr/sbin/rmail /usr/bin/rmail /bin/rmail; do
    if test -x $RMAILDEF ; then
	break
    fi
  done
  RMAILPATH="${RMAILPATH-$RMAILDEF}"
else
  RMAILPATH="$withval"
fi
AC_MSG_RESULT([Using ZMailer RMAILPATH: $RMAILPATH])

oldSELFADDRESSES="$SELFADDRESSES"
AC_SUBST(SELFADDRESSES)
AC_ARG_WITH(selfaddresses,   [  --with-selfaddresses=NAME,NAME  Comma separated list of names],
	use_selfaddresses=1)
if test "x$use_selfaddresses" != "x" ; then
    SELFADDRESSES="$withval"
else
    SELFADDRESSES="$oldSELFADDRESSES"
fi
AC_MSG_RESULT([Using ZMailer SELFADDRESSES: $SELFADDRESSES])

AC_SUBST(HAVE_YP)
AC_ARG_WITH(yp, [  --with-yp                Have YP in system, and want to use it],
	AC_DEFINE(HAVE_YP))
#AC_CHECK_HEADERS(rpc/rpc.h rpcsvc/yp_prot.h rpcsvc/ypclnt.h)
#if test "$ac_cv_header_rpc_rpc.h" = yes			\
#	-a "$ac_cv_header_rpcsvc_yp_prot_h" = yes	\
#	-a "$ac_cv_header_rpcsvc_ypclnt_h" = yes ; then
#    # Ok, we have the headers, do we have the libs ?
#    # Asch....  Lets just presume that headers match with libs
#    # (and for Solaris the needed  -lnsl  comes with  connect() )
#    AC_DEFINE(HAVE_YP)
#fi

AC_HEADER_SYS_WAIT
AC_FUNC_WAIT3
AC_CHECK_FUNCS(waitpid wait4)


# things get pretty tought, if the dup2() is not available ...
AC_CHECK_FUNC(dup2,
	AC_DEFINE(HAVE_DUP2),
	AC_MSG_ERROR([Bizzare -- the system does not have dup2()!  Is your C-compiler working ? (See config.log)])
	)

#
#  Study shared library generation
#
AC_SUBST(SHLIB_CFLAGS)
AC_SUBST(SHLIB_LD)
AC_SUBST(SHLIB_SUFFIX)
AC_SUBST(DL_LIBS)
AC_SUBST(LD_FLAGS)


AC_HEADER_DIRENT
AC_FUNC_CLOSEDIR_VOID

AC_TYPE_GETGROUPS
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_TYPE_UID_T
AC_CHECK_TYPE(ino_t, unsigned long)

AC_C_CONST
AC_HEADER_STDC

# Timezones are always a pain in... everybody has their own ways :-(
AC_CHECK_HEADER(sys/time.h)
AC_HEADER_TIME
AC_STRUCT_TIMEZONE
AC_STRUCT_TM

AC_DEFUN(AC_STRUCT_TM_GMTOFF,
[AC_REQUIRE([AC_STRUCT_TM])dnl
AC_CACHE_CHECK([for tm_gmtoff in struct tm], ac_cv_struct_tm_gmtoff,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <$ac_cv_struct_tm>], [struct tm tm; tm.tm_gmtoff;],
  ac_cv_struct_tm_gmtoff=yes, ac_cv_struct_tm_gmtoff=no)])
if test "$ac_cv_struct_tm_gmtoff" = yes; then
  AC_DEFINE(HAVE_TM_GMTOFF)
else
  AC_CACHE_CHECK(for altzone, ac_cv_var_altzone,
[AC_TRY_LINK([#include <time.h>
static int tt;],
[tt = (int)altzone;], ac_cv_var_altzone=yes, ac_cv_var_altzone=no)])
  AC_CACHE_CHECK(for timezone, ac_cv_var_timezone,
[AC_TRY_LINK([#include <time.h>
static int tt;],
[tt = (int)timezone;], ac_cv_var_timezone=yes, ac_cv_var_timezone=no)])
  if test "$ac_cv_var_altzone" = yes; then
    AC_DEFINE(HAVE_ALTZONE)
  fi
  if test "$ac_cv_var_timezone" = yes; then
    AC_DEFINE(HAVE_TIMEZONE)
  fi
fi
if test "x$ac_cv_var_altzone" = xno -a x$ac_cv_struct_tm_gmtoff = xno -a \
        "x$ac_cv_var_timezone" = xno ; then
  AC_MSG_RESULT([Aiee, autoconfig did not recognize timezone mechanism!  Time-zone offset calculation may give wrong results])
fi
])


AC_STRUCT_TM_GMTOFF

AC_STRUCT_ST_BLOCKS
AC_CACHE_CHECK(for st_blksize in struct stat, ac_cv_struct_stat_st_blksize, [
AC_TRY_LINK([#include <sys/types.h>
#include <sys/stat.h>], [struct stat st; st.st_blksize; ],
		AC_DEFINE(HAVE_ST_BLKSIZE) ac_cv_struct_stat_st_blksize=yes)
])

DEFDBTYPE="$DBTYPE" # From possible entry in  zmailer.conf above...
AC_SUBST(DBTYPE) # Default db-type, unless we figure out something.
AC_SUBST(DBEXT)  # Default db-extension (pag/db)
AC_CHECK_HEADERS(gdbm.h ndbm.h sdbm.h db.h)
LIBGDBM=""
# Sometimes it is in libc, sometimes at separate lib...
# Umm...
dblocation=""
if test "$ac_cv_header_gdbm_h" = yes ; then
  t_found_at="nowhere"
  if test "$ac_cv_lib_c_gdbm_open" = yes ; then
    LIBGDBM=""
    t_found_at="libc"
  else
    if test "$ac_cv_lib_gdbm_gdbm_open" = yes ; then
      LIBGDBM="-lgdbm"
      t_found_at="gdbm library"
      DBTYPE="gdbm"
    else
      AC_TRY_LINK([], [gdbm_open();], ac_cv_lib_c_gdbm_open=yes,
				      ac_cv_lib_c_gdbm_open=no)
      if test "$ac_cv_lib_c_gdbm_open" = no; then
	if test "x$ac_cv_lib_gdbm_gdbm_open" = x; then # not set
	  t_oldLibs="$LIBS"
	  LIBS="$LIBS -lgdbm"
	  AC_TRY_LINK([], [gdbm_open();], ac_cv_lib_gdbm_gdbm_open=yes,
					  ac_cv_lib_gdbm_gdbm_open=no)
	  if test "$ac_cv_lib_gdbm_gdbm_open" = yes; then
	    LIBGDBM="-lgdbm"
	    t_found_at="gdbm library"
	    DBTYPE="gdbm"
	  else
	    AC_MSG_RESULT([Has <gdbm.h>, but gdbm_open() is not at libc, nor at libgdbm ??])
	    
	  fi
	  LIBS="$t_oldLibs"
	else
	  AC_MSG_ERROR([config.cache inconsistency! (gdbm) Delete it, and redo!])
	fi
      else # Has it in the libc!
	LIBGDBM=""
	t_found_at="libc"
	DBTYPE="gdbm"
      fi
    fi
  fi
  AC_MSG_RESULT([Located GNU GDBM's  gdbm_open()  routine at $t_found_at])
  if test "$t_found_at" != nowhere; then
    dblocation="$dblocation;$t_found_at"
  fi
fi

LIBNDBM=""
if test "$ac_cv_header_ndbm_h" = yes ; then
  t_found_at="nowhere"
  if test "$ac_cv_lib_c_dbm_open" = yes ; then
    LIBNDBM=""
    t_found_at="libc"
    DBTYPE="ndbm"
  else
    if test "$ac_cv_lib_dbm_dbm_open" = yes ; then
      LIBNDBM="-ldbm"
      t_found_at="dbm library"
      DBTYPE="ndbm"
    else
      if test "$ac_cv_lib_dbm_dbm_open" = no ; then
	if test "$ac_cv_lib_db_dbm_open" = yes ; then
	  LIBNDBM="-ldb"
	  t_found_at="db library"
	  DBTYPE="ndbm"
	fi
      else
	AC_TRY_LINK([], [dbm_open();],	ac_cv_lib_c_dbm_open=yes,
					ac_cv_lib_c_dbm_open=no)
	if test "$ac_cv_lib_c_dbm_open" = no; then
	  if test "x$ac_cv_lib_dbm_dbm_open" = x; then # not set
	    t_oldLibs="$LIBS"
	    LIBS="$LIBS -ldbm"
	    AC_TRY_LINK([], [dbm_open();], ac_cv_lib_dbm_dbm_open=yes,
					   ac_cv_lib_dbm_dbm_open=no)
	    if test "$ac_cv_lib_dbm_dbm_open" = yes; then
	      LIBNDBM="-ldbm"
	      t_found_at="dbm library"
	      DBTYPE="ndbm"
	    else
	      LIBS="$t_oldLibs -ldb"
	      AC_TRY_LINK([],[dbm_open();], ac_cv_lib_db_dbm_open=yes,
					    ac_cv_lib_db_dbm_open=no)
	      if test "$ac_cv_lib_db_dbm_open" = yes ; then
		  LIBNDBM="-ldb"
		  t_found_at="db library"
		  DBTYPE="ndbm"
	      else
		  AC_MSG_RESULT([Has <ndbm.h>, but dbm_open() is not at libc, libndbm, nor at libdb ??])
	      fi
	    fi
	    LIBS="$t_oldLibs"
	  else
	    AC_MSG_ERROR([config.cache inconsistency! (ndbm) Delete it, and redo!])
	  fi
	else # Has it in the libc!
	  LIBNDBM=""
	  t_found_at="libc"
	  DBTYPE="ndbm"
	fi
      fi
    fi
  fi
  if test "$t_found_at" != nowhere ; then
    # If we have BSD DB's compability mode in use, it does not have
    # dbm_error() function.  Check at it!
    LIBS="$LIBS $LIBNDBM"
    AC_TRY_LINK([#include <ndbm.h>], [DBM *db;int i = dbm_error(db);], AC_DEFINE(HAVE_DBM_ERROR))
    LIBS="$t_oldLibs"
  fi
  AC_MSG_RESULT([Located NDBM's  dbm_open()  routine at $t_found_at])
  if test "$t_found_at" != nowhere; then
    dblocation="$dblocation;$t_found_at"
  fi
fi


LIBSDBM=""
# Sometimes it is in libc, sometimes at separate lib...
# Umm...
if test "$ac_cv_header_sdbm_h" = yes ; then
  AC_MSG_RESULT([Note:  SDBM  support is not really integrated!])
  AC_MSG_RESULT([Note2: Usually the <sdbm.h> is installed as  <ndbm.h> and the library])
  AC_MSG_RESULT([       is installed as  libdbm.a, and it is indistinguishable])
  AC_MSG_RESULT([       (at source level) from a real NDBM.])
  t_found_at="nowhere"
  if test "$ac_cv_lib_c_sdbm_open" = yes ; then
    LIBSDBM=""
    t_found_at="libc"
    DBTYPE="ndbm"
  else
    if test "$ac_cv_lib_sdbm_dbm_open" = yes ; then
      LIBSDBM="-lsdbm"
      t_found_at="sdbm library"
      DBTYPE="ndbm"
    else
      AC_TRY_LINK([], [dbm_open();], ac_cv_lib_c_dbm_open=yes,
				     ac_cv_lib_c_dbm_open=no)
      if test "$ac_cv_lib_c_dbm_open" = no; then
	if test "x$ac_cv_lib_sdbm_dbm_open" = x; then # not set
	  t_oldLibs="$LIBS"
	  LIBS="$LIBS -lsdbm"
	  AC_TRY_LINK([], [dbm_open();], ac_cv_lib_sdbm_dbm_open=yes,
					 ac_cv_lib_sdbm_dbm_open=no)
	  if test "$ac_cv_lib_sdbm_dbm_open" = yes; then
	    LIBSDBM="-lsdbm"
	    t_found_at="sdbm library"
	    DBTYPE="ndbm"
	  else
	    AC_MSG_RESULT([Has <sdbm.h>, but dbm_open() is not at libc, nor at libsdbm ??])
	  fi
	  LIBS="$t_oldLibs"
	else
	  AC_MSG_ERROR([config.cache inconsistency! (sdbm) Delete it, and redo!])
	fi
      else # Has it in the libc!
	LIBSDBM=""
	t_found_at="libc"
	DBTYPE="ndbm"
      fi
    fi
  fi
  AC_MSG_RESULT([Located SDBM's  dbm_open()  routine at $t_found_at])
  if test "$t_found_at" != nowhere; then
    dblocation="$dblocation;$t_found_at"
  fi
fi

LIBDB=""
# Sometimes it is in libc, sometimes at separate lib...
# Umm...
if test "$ac_cv_header_db_h" = yes ; then
  t_found_at="nowhere"
  if test "$ac_cv_lib_c_dbopen" = yes ; then
    LIBDB=""
    t_found_at="libc"
    DBTYPE="btree"
  else
    if test "$ac_cv_lib_db_dbopen" = yes ; then
      LIBDB="-ldb"
      t_found_at="db library"
      DBTYPE="btree"
    else
      AC_TRY_LINK([], [dbopen();], ac_cv_lib_c_dbopen=yes,
				   ac_cv_lib_c_dbopen=no)
      if test "$ac_cv_lib_c_dbopen" = no; then
	if test "x$ac_cv_lib_db_dbopen" = x; then # not set
	  t_oldLibs="$LIBS"
	  LIBS="$LIBS -ldb"
	  AC_TRY_LINK([], [dbopen();],	ac_cv_lib_db_dbopen=yes,
					ac_cv_lib_db_dbopen=no)
	  if test "$ac_cv_lib_db_dbopen" = yes; then
	    LIBDB="-ldb"
	    t_found_at="db library"
	    DBTYPE="btree"
	  else
	    AC_MSG_RESULT([Has <db.h>, but dbopen() is not at libc, nor at libdb ??])
	  fi
	  LIBS="$t_oldLibs"
	else
	  AC_MSG_ERROR([config.cache inconsistency! (db) Delete it, and redo!])
	fi
      else # Has it in the libc!
	LIBDB=""
	t_found_at="libc"
	DBTYPE="btree"
      fi
    fi
  fi
  AC_MSG_RESULT([Located BSD DB  dbopen()  routine at $t_found_at])
  if test "x$LIBDB" != "x" -a "x$LIBDB" = "x$LIBNDBM" ; then
	# Well, both at the same library ( -ldb ), which propably
	# means that  <ndbm.h>  is just an emulation mode at BSD DB.
	LIBNDBM=""
    AC_MSG_RESULT([Note: It looks like your NDBM is actually BSD DB compability wrapper at])
    AC_MSG_RESULT([      libdb -library.  If so, your NDBM databases are actually BSD DB_HASH ones..])
  fi
  if test "$t_found_at" != nowhere; then
    dblocation="$dblocation;$t_found_at"
  fi
fi

# Lets build a nice single substitute variable
AC_SUBST(LIBDBMS)
# GDBM must be last as if we have LIBDB at the system instead of real
# LIBNDBM, we still have ndbm routines, but want to use (likely)
# ones from LIBDB instead of LIBGDBM...
sep=""
if test "x$LIBNDBM" != "x" ; then
  LIBDBMS="$LIBDBMS$sep$LIBNDBM"
  sep=" "
fi
if test "x$LIBSDBM" != "x" ; then
  LIBDBMS="$LIBDBMS$sep$LIBSDBM"
  sep=" "
fi
if test "x$LIBDB" != "x" ; then
  LIBDBMS="$LIBDBMS$sep$LIBDB"
  sep=" "
fi
if test "x$LIBGDBM" != "x" ; then
  LIBDBMS="$LIBDBMS$sep$LIBGDBM"
  sep=" "
fi

if test "$dblocation" = "" ; then
  AC_MSG_RESULT([>>> OOPS!  You don't have any kind of modern DBMs in your])
  AC_MSG_RESULT([>>>        system!  We will not use ancient single-db using])
  AC_MSG_RESULT([>>>        <dbm.h> even if you had it.  Now you have only])
  AC_MSG_RESULT([>>>        relation (external) db types: ordered, unordered])
fi

if test "x$DEFDBTYPE" != "x" ; then
  DBTYPE="$DEFDBTYPE" # Use old value as a default..
fi
case "$DBTYPE" in
 gdbm|ndbm) DBEXT="pag" ;;
 btree)     DBEXT="db"  ;;
 *)	    DBEXT="dat" ;;
esac

AC_CHECK_HEADERS(string.h fcntl.h limits.h errno.h unistd.h stdlib.h \
    sys/param.h sys/statfs.h sys/fstyp.h mnttab.h mntent.h utime.h \
    sys/statvfs.h sys/vfs.h sys/mount.h sys/filsys.h sys/fs_types.h)
AC_CHECK_HEADERS(sys/utsname.h maillock.h)

#
# Following set of tests is rather weird... Some people don't agree on
# where to place these IPv6 related headers :-(
# The API specs say: <netinet/in.h>,  but some people disagree...
#

AC_CHECK_HEADERS(netinet/in.h sys/socket.h)
if test "$ac_cv_header_netinet_in_h" = no ; then
  AC_MSG_RESULT([%%% AIEEE!  NO  <netinet/in.h>  HEADER ?!])
fi

AC_ARG_WITH(ipv6,[  --with-ipv6              Have IPv6 in system, and want to use it],
	AC_DEFINE(INET6)
	ac_with_ipv6=yes
	)

if test "$ac_with_ipv6" = yes; then
  if test "x$ac_cv_af_inet6" = "x"; then
    AC_TRY_LINK([#include <sys/socket.h>],
		[int af = AF_INET6;],
		ac_cv_af_inet6=yes, ac_cv_af_inet6=no)
    if test "$ac_cv_af_inet6" = yes; then
	AC_TRY_LINK([#include <sys/socket.h>
		     #include <netinet/in.h>],
		    [/* Has AF_INET6, but does one have all related things ? */
		     struct in6_addr sin6;],
		    ac_cv_struct_in6_addr=yes, ac_cv_struct_in6_addr=no)
	AC_MSG_RESULT([We have <sys/socket.h> defining  AF_INET6, but do we have properly ..])
	AC_MSG_RESULT([.. structured <netinet/in.h> headers with 'struct in6_addr' ? $ac_cv_struct_in6_addr])
	if test "$ac_cv_struct_in6_addr" != yes; then

	    AC_CHECK_HEADERS(netinet/in6.h)
	    if test "$ac_cv_header_netinet_in6_h" != "yes" ; then
		AC_CHECK_HEADERS(netinet6/in6.h)
		if test "$ac_cv_header_netinet6_in6_h" != "yes" ; then

		    AC_CHECK_HEADERS(linux/in6.h)
		    if test "$ac_cv_header_linux_in6_h" != "yes" ; then
			AC_MSG_RESULT([***  You have a SOME system with  <sys/socket.h>  defining AF_INET6, however])
			AC_MSG_RESULT([***  the system does not have all required includes ])
			AC_MSG_RESULT([***  for the compilation to succeed. ])
			AC_MSG_RESULT([***  I know of some releases of Linux 2.0.* systems doing this.])
			AC_MSG_RESULT([***  If you have one, edit the  <linux/socket.h>,  and])
			AC_MSG_RESULT([***  remove the define of   AF_INET6 ])
			AC_MSG_ERROR([AF_INET6 feature error])
		    fi
		fi
	    fi
	fi
    fi
  else
    if test "$ac_cv_af_inet6" = yes; then
	# We were successfull at creating these cached variables above,
	# thus we can (with confidence) do following, and only one is
	# defined as an end result..
	if test "$ac_cv_header_netinet_in6_h" = yes; then
	    AC_DEFINE(HAVE_NETINET_IN6_H)
	fi
	if test "$ac_cv_header_netinet6_in6_h" = yes; then
	    AC_DEFINE(HAVE_NETINET6_IN6_H)
	fi
	if test "$ac_cv_header_linux_in6_h" = yes; then
	    AC_DEFINE(HAVE_LINUX_IN6_H)
	fi
    fi
  fi
fi # End of:  --with-ipv6


AC_CHECK_HEADERS(varargs.h stdarg.h)
AC_CHECK_FUNCS(flock lockf lstat fsync)
AC_SUBST(LIBMAIL)
if test "x$ac_cv_func_maillock_lmail" = "x"; then
  if test "$ac_cv_header_maillock_h" = "yes" ; then
    t_oldLibs="$LIBS"
    LIBS="$LIBS -lmail"
    AC_TRY_LINK([#include <maillock.h>],[mailunlock();],[
	ac_cv_func_maillock_lmail=yes])
    LIBS="$t_oldLibs"
  else
    ac_cv_func_maillock_lmail=no
  fi
fi
if test "$ac_cv_func_maillock_lmail" = "yes"; then
	AC_DEFINE(HAVE_MAILLOCK)
	LIBMAIL="-lmail"
	AC_MSG_RESULT([System has  maillock()  with -lmail])
else
	AC_DEFINE(HAVE_DOTLOCK)
	AC_MSG_RESULT([Using traditional UNIX 'dot-lock' mailbox locks])
fi
AC_CHECK_FUNCS(mkdir mktime rename rmdir strcpy strdup strstr \
		strchr strrchr setvbuf strerror strsignal setreuid)
# If the system does not have the following (library) calls,
# we use emulations (replacements):
AC_REPLACE_FUNCS(mkdir mktime rename rmdir strcpy strdup strstr \
		 strchr strrchr setvbuf strerror strsignal)

AC_DECL_SYS_SIGLIST

AC_CACHE_CHECK([existence of char **sys_siglist], ac_cv_arr_sys_siglist, [
AC_TRY_LINK([extern char *sys_siglist[]; static char *s;], [s = sys_siglist[2]; ],
		[AC_DEFINE(HAVE_SYS_SIGLIST)
		 ac_cv_arr_sys_siglist=yes])
])


# Additional tests for the emulations..
AC_CHECK_FUNCS(index rindex)
# more tests..
AC_CHECK_FUNCS(endgrent fchdir ftime getcwd getgroups \
		getmntinfo gettimeofday isascii memcpy mkfifo   \
		getpgrp setsid seteuid setuid)
AC_CHECK_FUNCS(setrlimit fchown utimes utime sysconf fpathconf)
# Networking stuff is in deep trouble, if sockets are not found..
AC_CHECK_HEADERS(netdb.h syslog.h sys/resource.h \
		protocols/rwhod.h select.h sys/select.h utime.h)
AC_CHECK_FUNCS(select syslog getdtablesize)

#
# Test to see, if we have BSD4.4  sa_len -field in the "struct sockaddr*"
#
AC_DEFUN(AC_STRUCT_SA_LEN,
[AC_CACHE_CHECK([for 'sa_len' in 'struct sockaddr'], ac_cv_struct_sa_len,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/socket.h>], [struct sockaddr sa; sa.sa_len = 0; ],
        ac_cv_struct_sa_len=yes, ac_cv_struct_sa_len=no)])
if test "$ac_cv_struct_sa_len" = yes; then
  AC_DEFINE(HAVE_SA_LEN)
fi
])

AC_STRUCT_SA_LEN

AC_CHECK_FUNC(res_init)  # Can be found without any libs ?  Or needs BIND libresolv ?

AC_SUBST(LIBRESOLV)
AC_SUBST(INCLRESOLV)
AC_SUBST(LIBRESOLVA)
AC_ARG_WITH(bundled-libresolv,   [  --with-bundled-libresolv Use bundled libresolv source'],
	use_resolvopt=1)
if test -z "$use_resolvopt" ; then
    if test $ac_cv_func_res_init = yes ; then
	LIBRESOLV="" #  res_init() is at system libc
    else
	LIBRESOLV="-lresolv"
    fi
    AC_DEFINE(HAVE_GETHOSTBYNAME)
    AC_DEFINE(HAVE_RESOLVER)
    INCLRESOLV=""
    LIBRESOLVA=""
    AC_MSG_RESULT([Using system supplied libresolv -- hope it works..])
else
    # We have bundled BIND 4.9.4 resolver, which can make things
    # so much simpler to ourselves (except at BSD machines..)
    AC_DEFINE(HAVE_GETHOSTBYNAME)
    AC_DEFINE(HAVE_RESOLVER)
    LIBRESOLV="-lresolv"
    INCLRESOLV='-I$(TOPDIR)/libresolv'
    LIBRESOLVA="libresolv.a"
    AC_MSG_RESULT([Using bundled (bind 4.9.4-REL) libresolv])
fi

#
#  We check for various libraries
#  - SysVr4 style of "-lsocket" at first (unless in libc)
#    The hallmark is  connect()  routine (we presume)
#
AC_SUBST(LIBSOCKET)dnl
ac_cv_libsocket_both=1
AC_CHECK_FUNC(connect, ac_cv_libsocket_both=0)
AC_CHECK_FUNC(gethostbyname, ac_cv_libsocket_both=0)
if test "$ac_cv_libsocket_both" = 1 ; then
  # Check cache
  if test "$ac_cv_func_socket_lsocket" = yes ; then
    AC_MSG_RESULT([need -lsocket library (cached)])
    LIBSOCKET="-lsocket"
    if test "$ac_cv_func_gethostbyname_lnsl" = yes ; then
	LIBSOCKET="-lsocket -lnsl"
    fi
  else
    # Well, will this work ?  SysVR4, but not Sun Solaris ?
    AC_CHECK_LIB(socket, connect, [LIBSOCKET="-lsocket"
				   ac_cv_func_socket_lsocket=yes],
				   ac_cv_func_socket_lsocket=no)
    if test "$ac_cv_func_socket_lsocket" = yes ; then
      t_oldLibs="$LIBS"
      LIBS="$LIBS -lsocket $LIBRESOLV"
      AC_TRY_LINK([],[gethostbyname();], ,[
	  LIBS="$LIBS -lnsl" # Add this Solaris library..
	  AC_TRY_LINK([],[gethostbyname();],[
			LIBSOCKET="-lsocket -lnsl"
			ac_cv_func_gethostbyname_lnsl=yes
		], [
		   AC_MSG_ERROR([Weird, '$LIBS' not enough to find  gethostnyname() ?!])
		])
	])
      LIBS="$t_oldLibs"
    fi
  fi
fi

if test "$LIBRESOLV" = ""; then
  # Ok, No  -lresolv,  is this enough for the  _res  to appear ?
  t_oldLibs="$LIBS"
  LIBS="$LIBS $LIBSOCKET"
  AC_TRY_LINK([#include <resolv.h>],
	      [_res.options = RES_INIT;],
		ac_cv_var__res_options=yes);
  if test "$ac_cv_var__res_options" != "yes"; then
    AC_MSG_RESULT([Can't do without  -lresolv  to link resolver's  _res.options])
    LIBRESOLV="-lresolv"
  fi
  LIBS="$t_oldLibs"
fi

# See about the routines that possibly exist at the libraries..
LIBS="$t_oldLibs $LIBSOCKET"
AC_CHECK_FUNCS(socket socketpair)
LIBS="$t_oldLibs"

if test "$ac_cv_func_socket" = no -a "$LIBSOCKET" != ""; then
  LIBS="$LIBS $LIBSOCKET"
  AC_TRY_LINK([],[socket();], ac_cv_func_socket=yes)
  if test $ac_cv_func_socket = yes; then
    AC_DEFINE(HAVE_SOCKET)
    AC_MSG_RESULT([Has  socket()  when using  $LIBSOCKET])
  fi
  LIBS="$t_oldLibs"
fi
if test "$ac_cv_func_socketpair" = no -a "$LIBSOCKET" != ""; then
  LIBS="$LIBS $LIBSOCKET"
  AC_TRY_LINK([],[socketpair();], ac_cv_func_socketpair=yes)
  if test $ac_cv_func_socketpair = yes; then
    AC_DEFINE(HAVE_SOCKETPAIR)
    AC_MSG_RESULT([Has  socketpair()  when using  $LIBSOCKET])
  fi
  LIBS="$t_oldLibs"
fi

#  Following stuff may exist in our LIBC, or in separate -linet6
AC_CHECK_FUNCS(inet_ntop inet_pton getaddrinfo getnameinfo \
		gai_strerror)
#  If not found in LIBC, try to use  -linet6,  if it fails too,
#  THEN call the AC_REPLACE_FUNCS()
if test "$ac_cv_func_getaddrinfo" = no ; then
  LIBS="$LIBS $LIBSOCKET -linet6"
  AC_TRY_LINK([],[getaddrinfo();], ac_cv_func_getaddrinfo=yes)
  if test "$ac_cv_func_getaddrinfo" = yes; then
    LIBSOCKET="$LIBSOCKET -linet6"
    AC_MSG_RESULT([Has IPv6 API  getaddrinfo()  when using  $LIBSOCKET])
  else
    AC_REPLACE_FUNCS(inet_ntop inet_pton gai_strerror	\
		     getaddrinfo getnameinfo)
  fi
  LIBS="$t_oldLibs"
fi

AC_ARG_WITH(rfc822-tabs,   [  --without-rfc822-tabs  Turn off the TABs from the rewritten headers ],
	[if test "$withval" = no; then
	   use_rfc822_tabs=0
	 else
	   use_rfc822_tabs=1
	 fi], [use_rfc822_tabs=1])
AC_DEFINE_UNQUOTED(RFC822TABS,$use_rfc822_tabs)
AC_MSG_RESULT([RFC-822 TABs setting: $use_rfc822_tabs])

AC_SUBST(LIBWRAP)
AC_SUBST(INCLWRAP)
AC_ARG_WITH(tcp-wrappers,   [  --with-tcp-wrappers=DIRPATH Where the TCP-WRAPPERS can be found],
	use_tcpwrappers=1)

t_oldLibs="$LIBS"
t_oldCpp="$CPPFLAGS"

if test -z "$use_tcpwrappers" ; then
#    if test "$ac_cv_lib_tcpwrap" = yes; then
#	LIBWRAP="-lwrap"
#	INCLWRAP=""
#	AC_MSG_RESULT([Tcp-wrapper available at system default: -lwrap !]);
#    else
#-------------
#	AC_TRY_LINK([#include <tcpd.h>
#		     int deny_severity, allow_severity;],[hosts_access();],
#			 ac_cv_lib_tcpwrap=yes,ac_cv_lib_tcpwrap=no)
#	LIBWRAP=""
#	INCLWRAP=""
#	if test "$ac_cv_lib_tcpwrap" = yes; then
#	    AC_MSG_RESULT([Tcp-wrapper available at $wraploc: -lwrap !]);
#	else
#	    AC_MSG_RESULT([No tcp-wrapper available system at default location ?])
#	fi
#	: # "nop"	
#-------------
	AC_CHECK_HEADER(tcpd.h)
	if test "$ac_cv_header_tcpd_h" = yes; then
	    LIBWRAP="-lwrap"
	    INCLWRAP=""
	    wraploc="sysdefault"
	else
	    AC_CHECK_HEADERS(/local/include/tcpd.h /usr/local/include/tcpd.h \
			     /opt/include/tcpd.h /opt/local/include/tcpd.h)
	    if test -n "$ac_cv_header_local_include_tcpd_h"; then
		LIBWRAP="-L/local/lib -lwrap"
		INCLWRAP="-I/local/include"
		wraploc="-L/local/lib -I/local/include"
	    elif test -n "$ac_cv_header_usr_local_include_tcpd_h"; then
		LIBWRAP="-L/usr/local/lib -lwrap"
		INCLWRAP="-I/usr/local/include"
		wraploc="-L/usr/local/lib -I/usr/local/include"
	    elif test -n "$ac_cv_header_opt_include_tcpd_h"; then
		LIBWRAP="-L/opt/lib -lwrap"
		INCLWRAP="-I/opt/include"
		wraploc="-L/opt/lib -I/opt/include"
	    elif test -n "$ac_cv_header_opt_local_include_tcpd_h"; then
		LIBWRAP="-L/opt/local/lib -lwrap"
		INCLWRAP="-I/opt/local/include"
		wraploc="-L/opt/local/lib -I/opt/local/include"
	    else
		LIBWRAP=""
		INCLWRAP=""
		wraploc="nowhere?"
	    fi
	fi
	LIBS="$LIBS $LIBSOCKET $LIBWRAP"
	CPPFLAGS="$CPPFLAGS $INCLWRAP"
	AC_CACHE_VAL(ac_cv_lib_tcpwrap,
	  [AC_TRY_LINK([#include <tcpd.h>
			int deny_severity, allow_severity;],[hosts_access();],
			ac_cv_lib_tcpwrap=yes,ac_cv_lib_tcpwrap=no)
	  ])
	if test "$ac_cv_lib_tcpwrap" = yes; then
	    AC_MSG_RESULT([Tcp-wrapper available at $wraploc: -lwrap !]);
	else
	    AC_MSG_RESULT([No tcp-wrapper available at system default locations ?])
	    LIBWRAP=""
	    INCLWRAP=""
	fi
#    fi
else
    LIBWRAP="-L$withval -lwrap"
    INCLWRAP="-I$withval"
    unset ac_cv_lib_tcpwrap
    AC_DEFINE(HAVE_TCPD_H)
    AC_MSG_RESULT([Using tcp-wrappers at directory: $withval]);
fi

CPPFLAGS="$t_oldCpp"
LIBS="$t_oldLibs"


#
#  At some systems the load-average can be gotten with these routines..
#
AC_SUBST(LIBLOADAVER)dnl
AC_CHECK_HEADER(kvm.h)
if test "$ac_cv_header_kvm_h" = yes; then
  AC_DEFINE(SVR4_kvm)
  LIBLOADAVER="-lkvm"
  AC_MSG_RESULT([Presuming the need of -lkvm for load-average library])
fi
AC_CHECK_HEADER(elf.h, [
elf_LIBS="$LIBS"
LIBS="$LIBS -lelf"
AC_TRY_LINK([#include <nlist.h>],[nlist((char*)0,(char*)0);],
	    [AC_DEFINE(SVR4_elf)
	     LIBLOADAVER="$LIBLOADAVER -lelf"
	     AC_MSG_RESULT([Presuming the need of '$LIBLOADAVER' for load-average library])])
LIBS="$elf_LIBS"
])

AC_DEFUN(AC_FUNC_SPRINTF,
[AC_MSG_CHECKING([for the return type of sprintf() being char*])
AC_CACHE_VAL(ac_cv_func_char_sprintf,
 [AC_TRY_RUN([
    extern char *sprintf();
    int main()
    {
	char buf[20];
	char *ss = sprintf(buf,"xx");
	return (ss == buf); /* returns the char pointer */
    }],
    ac_cv_func_char_sprintf=no,
    ac_cv_func_char_sprintf=yes,
    ac_cv_func_char_sprintf=no)])
AC_MSG_RESULT([$ac_cv_func_char_sprintf])
AC_SUBST(DSPRINTF_TYPE)
if test $ac_cv_func_char_sprintf = yes; then
  DSPRINTF_TYPE="-DSPRINTF_CHAR"
else
  DSPRINTF_TYPE=""
fi
])

AC_FUNC_STRFTIME
AC_FUNC_SPRINTF
AC_FUNC_VPRINTF
AC_CHECK_FUNCS(vsprintf vsnprintf snprintf)
AC_FUNC_ALLOCA
AC_FUNC_GETPGRP
AC_FUNC_MMAP
AC_FUNC_UTIME_NULL

AC_MSG_CHECKING([for d_ino member in directory struct])
AC_CACHE_VAL(fu_cv_sys_d_ino_in_dirent,
[AC_TRY_LINK([
#include <sys/types.h>
#ifdef HAVE_DIRENT_H
# include <dirent.h>
#else /* not HAVE_DIRENT_H */
# define dirent direct
# ifdef HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
# endif /* HAVE_SYS_NDIR_H */
# ifdef HAVE_SYS_DIR_H
#  include <sys/dir.h>
# endif /* HAVE_SYS_DIR_H */
# ifdef HAVE_NDIR_H
#  include <ndir.h>
# endif /* HAVE_NDIR_H */
#endif /* HAVE_DIRENT_H */
],
  [struct dirent dp; dp.d_ino = 0;],
    fu_cv_sys_d_ino_in_dirent=yes,
    fu_cv_sys_d_ino_in_dirent=no)])
AC_MSG_RESULT($fu_cv_sys_d_ino_in_dirent)
if test $fu_cv_sys_d_ino_in_dirent = yes; then
  AC_DEFINE(D_INO_IN_DIRENT)
fi

# Determine how to get the list of mounted filesystems.
list_mounted_fs=

# If the getmntent function is available but not in the standard library,
# make sure LIBS contains -lsun (on Irix4) or -lseq (on PTX).
AC_FUNC_GETMNTENT

if test $ac_cv_func_getmntent = yes; then

  # This system has the getmntent function.
  # Determine whether it's the one-argument variant or the two-argument one.

  if test -z "$list_mounted_fs"; then
    # 4.3BSD, SunOS, HP-UX, Dynix, Irix
    AC_MSG_CHECKING([for one-argument getmntent function])
    AC_CACHE_VAL(fu_cv_sys_mounted_getmntent1,
		 [test $ac_cv_header_mntent_h = yes \
		   && fu_cv_sys_mounted_getmntent1=yes \
		   || fu_cv_sys_mounted_getmntent1=no])
    AC_MSG_RESULT($fu_cv_sys_mounted_getmntent1)
    if test $fu_cv_sys_mounted_getmntent1 = yes; then
      list_mounted_fs=found
      AC_DEFINE(MOUNTED_GETMNTENT1)
    fi
  fi

  if test -z "$list_mounted_fs"; then
    # SVR4
    AC_MSG_CHECKING([for two-argument getmntent function])
    AC_CACHE_VAL(fu_cv_sys_mounted_getmntent2,
    [AC_EGREP_HEADER(getmntent, sys/mnttab.h,
      fu_cv_sys_mounted_getmntent2=yes,
      fu_cv_sys_mounted_getmntent2=no)])
    AC_MSG_RESULT($fu_cv_sys_mounted_getmntent2)
    if test $fu_cv_sys_mounted_getmntent2 = yes; then
      list_mounted_fs=found
      AC_DEFINE(MOUNTED_GETMNTENT2)
    fi
  fi

  if test -z "$list_mounted_fs"; then
    AC_MSG_ERROR([could not determine how to read list of mounted filesystems])
  fi

fi

if test -z "$list_mounted_fs"; then
  # DEC Alpha running OSF/1.
  AC_MSG_CHECKING([for getfsstat function])
  AC_CACHE_VAL(fu_cv_sys_mounted_getsstat,
  [AC_TRY_LINK([
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/fs_types.h>],
  [struct statfs *stats;
  numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT); ],
    fu_cv_sys_mounted_getsstat=yes,
    fu_cv_sys_mounted_getsstat=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_getsstat)
  if test $fu_cv_sys_mounted_getsstat = yes; then
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_GETFSSTAT)
  fi
fi

if test -z "$list_mounted_fs"; then
  # AIX.
  AC_MSG_CHECKING([for mntctl function and struct vmount])
  AC_CACHE_VAL(fu_cv_sys_mounted_vmount,
  [AC_TRY_CPP([#include <fshelp.h>],
    fu_cv_sys_mounted_vmount=yes,
    fu_cv_sys_mounted_vmount=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_vmount)
  if test $fu_cv_sys_mounted_vmount = yes; then
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_VMOUNT)
  fi
fi

if test -z "$list_mounted_fs"; then
  # SVR3
  AC_MSG_CHECKING([for FIXME existence of three headers])
  AC_CACHE_VAL(fu_cv_sys_mounted_fread_fstyp,
    [AC_TRY_CPP([
#include <sys/statfs.h>
#include <sys/fstyp.h>
#include <mnttab.h>],
		fu_cv_sys_mounted_fread_fstyp=yes,
		fu_cv_sys_mounted_fread_fstyp=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_fread_fstyp)
  if test $fu_cv_sys_mounted_fread_fstyp = yes; then
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_FREAD_FSTYP)
  fi
fi

if test -z "$list_mounted_fs"; then
  # 4.4BSD and DEC OSF/1.
  AC_MSG_CHECKING([for getmntinfo function])
  AC_CACHE_VAL(fu_cv_sys_mounted_getmntinfo,
    [
      ok=
      if test $ac_cv_func_getmntinfo = yes; then
	AC_EGREP_HEADER(f_type;, sys/mount.h,
			ok=yes)
      fi
      test -n "$ok" \
	  && fu_cv_sys_mounted_getmntinfo=yes \
	  || fu_cv_sys_mounted_getmntinfo=no
    ])
  AC_MSG_RESULT($fu_cv_sys_mounted_getmntinfo)
  if test $fu_cv_sys_mounted_getmntinfo = yes; then
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_GETMNTINFO)
  fi
fi

# FIXME: add a test for netbsd-1.1 here

if test -z "$list_mounted_fs"; then
  # Ultrix
  AC_MSG_CHECKING([for getmnt function])
  AC_CACHE_VAL(fu_cv_sys_mounted_getmnt,
    [AC_TRY_CPP([
#include <sys/fs_types.h>
#include <sys/mount.h>],
		fu_cv_sys_mounted_getmnt=yes,
		fu_cv_sys_mounted_getmnt=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_getmnt)
  if test $fu_cv_sys_mounted_getmnt = yes; then
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_GETMNT)
  fi
fi

if test -z "$list_mounted_fs"; then
  # SVR2
  AC_MSG_CHECKING([whether it is possible to resort to fread on /etc/mnttab])
  AC_CACHE_VAL(fu_cv_sys_mounted_fread,
    [AC_TRY_CPP([#include <mnttab.h>],
		fu_cv_sys_mounted_fread=yes,
		fu_cv_sys_mounted_fread=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_fread)
  if test $fu_cv_sys_mounted_fread = yes; then
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_FREAD)
  fi
fi

if test -z "$list_mounted_fs"; then
  AC_MSG_ERROR([could not determine how to read list of mounted filesystems])
  # FIXME -- no need to abort building the whole package
  # Can't build mountlist.c or anything that needs its functions
fi

AC_CHECKING(how to get filesystem space usage:)
space=no

# Here we'll compromise a little (and perform only the link test)
# since it seems there are no variants of the statvfs function.
if test $space = no; then
  # SVR4
  AC_CHECK_FUNCS(statvfs)
  if test $ac_cv_func_statvfs = yes; then
    space=yes
    AC_DEFINE(STAT_STATVFS)
  fi
fi

if test $space = no; then
  # DEC Alpha running OSF/1
  AC_MSG_CHECKING([for 3-argument statfs function (DEC OSF/1)])
  AC_CACHE_VAL(fu_cv_sys_stat_statfs3_osf1,
  [AC_TRY_RUN([
#include <sys/param.h>
#include <sys/types.h>
#include <sys/mount.h>
  main ()
  {
    struct statfs fsd;
    fsd.f_fsize = 0;
    exit (statfs (".", &fsd, sizeof (struct statfs)));
  }],
  fu_cv_sys_stat_statfs3_osf1=yes,
  fu_cv_sys_stat_statfs3_osf1=no,
  fu_cv_sys_stat_statfs3_osf1=no)])
  AC_MSG_RESULT($fu_cv_sys_stat_statfs3_osf1)
  if test $fu_cv_sys_stat_statfs3_osf1 = yes; then
    space=yes
    AC_DEFINE(STAT_STATFS3_OSF1)
  fi
fi

if test $space = no; then
# AIX
  AC_MSG_CHECKING([for two-argument statfs with statfs.bsize dnl
member (AIX, 4.3BSD)])
  AC_CACHE_VAL(fu_cv_sys_stat_statfs2_bsize,
  [AC_TRY_RUN([
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif
  main ()
  {
  struct statfs fsd;
  fsd.f_bsize = 0;
  exit (statfs (".", &fsd));
  }],
  fu_cv_sys_stat_statfs2_bsize=yes,
  fu_cv_sys_stat_statfs2_bsize=no,
  fu_cv_sys_stat_statfs2_bsize=no)])
  AC_MSG_RESULT($fu_cv_sys_stat_statfs2_bsize)
  if test $fu_cv_sys_stat_statfs2_bsize = yes; then
    space=yes
    AC_DEFINE(STAT_STATFS2_BSIZE)
  fi
fi

if test $space = no; then
# SVR3
  AC_MSG_CHECKING([for four-argument statfs (AIX-3.2.5, SVR3)])
  AC_CACHE_VAL(fu_cv_sys_stat_statfs4,
  [AC_TRY_RUN([#include <sys/types.h>
#include <sys/statfs.h>
  main ()
  {
  struct statfs fsd;
  exit (statfs (".", &fsd, sizeof fsd, 0));
  }],
    fu_cv_sys_stat_statfs4=yes,
    fu_cv_sys_stat_statfs4=no,
    fu_cv_sys_stat_statfs4=no)])
  AC_MSG_RESULT($fu_cv_sys_stat_statfs4)
  if test $fu_cv_sys_stat_statfs4 = yes; then
    space=yes
    AC_DEFINE(STAT_STATFS4)
  fi
fi

if test $space = no; then
# 4.4BSD and NetBSD
  AC_MSG_CHECKING([for two-argument statfs with statfs.fsize dnl
member (4.4BSD and NetBSD)])
  AC_CACHE_VAL(fu_cv_sys_stat_statfs2_fsize,
  [AC_TRY_RUN([#include <sys/types.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
  main ()
  {
  struct statfs fsd;
  fsd.f_fsize = 0;
  exit (statfs (".", &fsd));
  }],
  fu_cv_sys_stat_statfs2_fsize=yes,
  fu_cv_sys_stat_statfs2_fsize=no,
  fu_cv_sys_stat_statfs2_fsize=no)])
  AC_MSG_RESULT($fu_cv_sys_stat_statfs2_fsize)
  if test $fu_cv_sys_stat_statfs2_fsize = yes; then
    space=yes
    AC_DEFINE(STAT_STATFS2_FSIZE)
  fi
fi

if test $space = no; then
  # Ultrix
  AC_MSG_CHECKING([for two-argument statfs with struct fs_data (Ultrix)])
  AC_CACHE_VAL(fu_cv_sys_stat_fs_data,
  [AC_TRY_RUN([#include <sys/types.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_SYS_FS_TYPES_H
#include <sys/fs_types.h>
#endif
  main ()
  {
  struct fs_data fsd;
  /* Ultrix's statfs returns 1 for success,
     0 for not mounted, -1 for failure.  */
  exit (statfs (".", &fsd) != 1);
  }],
  fu_cv_sys_stat_fs_data=yes,
  fu_cv_sys_stat_fs_data=no,
  fu_cv_sys_stat_fs_data=no)])
  AC_MSG_RESULT($fu_cv_sys_stat_fs_data)
  if test $fu_cv_sys_stat_fs_data = yes; then
    space=yes
    AC_DEFINE(STAT_STATFS2_FS_DATA)
  fi
fi

if test $space = no; then
# SVR2
AC_TRY_CPP([#include <sys/filsys.h>],
  AC_DEFINE(STAT_READ_FILSYS) space=yes)
fi

#if test -n "$list_mounted_fs" && test $space != no; then
#  PROGS="$PROGS df" LIBOBJS="$LIBOBJS"
#fi

AC_CHECK_FUNCS(ftruncate, , [ftruncate_missing=yes])

if test "$ftruncate_missing" = yes; then
  AC_MSG_CHECKING([fcntl emulation of ftruncate])
  AC_CACHE_VAL(fu_cv_sys_ftruncate_emulation,
  [AC_TRY_LINK([
#include <sys/types.h>
#include <fcntl.h>], [
#if !defined(F_CHSIZE) && !defined(F_FREESP)
chsize();
#endif
],
    fu_cv_sys_ftruncate_emulation=yes,
    fu_cv_sys_ftruncate_emulation=no)])
  AC_MSG_RESULT($fu_cv_sys_ftruncate_emulation)
  if test $fu_cv_sys_ftruncate_emulation = yes; then
    LIBOBJS="$LIBOBJS ftruncate.o"
  fi
fi

# If we don't yet have getgroups, see if it's in -lbsd.
# This is reported to be necessary on an ITOS 3000WS running SEIUX 3.1.
AC_CHECK_FUNC(getgroups, , AC_CHECK_LIB(bsd, getgroups))

# Check for libypsec.a on Dolphin M88K machines.
AC_CHECK_LIB(ypsec, main)

# m88k running dgux 5.4 needs this
AC_CHECK_LIB(ldgc, main)

AC_CHECKING(for AFS)
test -d /afs && AC_DEFINE(AFS)

AC_OUTPUT(Makefile
	router/Makefile			router/libdb/Makefile		\
	scheduler/Makefile		smtpserver/Makefile		\
	transports/Makefile		transports/smtp/Makefile	\
	transports/mailbox/Makefile	transports/hold/Makefile	\
	transports/libta/Makefile	transports/sm/Makefile		\
	transports/errormail/Makefile	transports/fuzzyalias/Makefile	\
	support/vacation/Makefile	man/vacation.1			\
	support/vacation/vacation.sh					\
	compat/Makefile			compat/rmail/Makefile		\
	compat/sendmail/Makefile	utils/makendbm/Makefile		\
	lib/Makefile			libc/Makefile			\
	libident/Makefile		libs/Makefile			\
	libsh/Makefile			libmalloc/Makefile		\
	libmalloc/splay/Makefile	libresolv/Makefile		\
	ssl/Makefile			doc/design/Makefile		\
	include/mail.h			man/Makefile			\
	utils/zmailer.init.sh		utils/autoanswer.pl		\
	utils/policy-builder.sh						\
	proto/Makefile			proto/zmailer.sh		\
	proto/newaliases		proto/newfqdnaliases		\
	proto/mailrm.sh			proto/db/Makefile		\
	proto/smtpserver.conf		proto/cf/TELE-FI.cf		\
	proto/cf/SMTP+UUCP.cf		proto/cf/UTdefault.cf		\
	proto/db/aliases						\
	bin/mkdep			bin/mklibdep			\
	SiteConfig	,
[chmod 755 bin/*
 echo > stamp-h])dnl
AC_MSG_RESULT([Remember to check  SiteConfig  for possible option changes])
