dnl Usage: RELYX_WARNING(message)  Displays the warning "message" and sets
the
dnl flag lyx_warning to yes.
AC_DEFUN(RELYX_WARNING,[
relyx_warning_txt="$relyx_warning_txt
== $1
"
relyx_warning=yes])


dnl RELYX_SEARCH_PROG(VARIABLE-NAME,PROGRAMS-LIST,ACTION-IF-FOUND)
dnl             
define(RELYX_SEARCH_PROG,[dnl
for ac_prog in $2 ; do
# Extract the first word of "$ac_prog", so it can be a program name with
# args.
  set dummy $ac_prog ; ac_word=$[2]
  if test ! -n "[$]$1"; then
    IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
    for ac_dir in $PATH; do
      test -z "$ac_dir" && ac_dir=.
      if test -f [$ac_dir/$ac_word]; then
        $1="$ac_prog"
        break
      fi
    done
    IFS="$ac_save_ifs"
  fi

  if test -n "[$]$1"; then
    ac_result=yes
  else
    ac_result=no
  fi
  ifelse($3,,,[$3])
  test -n "[$]$1" && break
done
])


dnl Usage RELYX_PROG_PERL_OK
AC_DEFUN(RELYX_PROG_PERL_OK,[
if echo 'require 5.002;exit' | $ac_dir/$ac_prog 2>&5
then
  PERL=$ac_dir/$ac_prog
else
  PERL=
fi])

dnl Usage RELYX_CHECK_PERL
AC_DEFUN(RELYX_CHECK_PERL,[
AC_MSG_CHECKING([for perl >= 5.002])
RELYX_SEARCH_PROG(PERL, perl perl5 perl5.002 perl5.003 perl5.004,
RELYX_PROG_PERL_OK
)
if test -n "$PERL" ; then
  AC_MSG_RESULT($PERL)
else
  PERL="/bin/echo reLyX has been disabled because perl version 5.002 has
not \
been found.\nTo reenable it, edit "
  AC_MSG_RESULT(no)
  RELYX_WARNING(dnl
Configure has not been able to find a version 5.002 or better of Perl.
   reLyX has been setup to only display a warning message.
   Set variable PERL to some value to install a working reLyX.)
fi
AC_SUBST(PERL)])

dnl Usage: RELYX_CHECK_ERRORS  Displays a warning message if a RELYX_ERROR
dnl   has occured previously. 
AC_DEFUN(RELYX_CHECK_ERRORS,[
if test x$relyx_error = xyes; then
cat <<EOF
**** The following problems have been detected by configure. 
**** Please check the messages below before running 'make'.
**** (see the section 'Problems' in the INSTALL file)
$relyx_error_txt
$relyx_warning_txt
deleting cache $cache_file
EOF
  rm -f $cache_file
else

if test x$relyx_warning = xyes; then
cat <<EOF
=== The following minor problems have been detected by configure. 
=== Please check the messages below before running 'make'.
=== (see the section 'Problems' in the INSTALL file)
$relyx_warning_txt
EOF
fi
cat <<EOF
Configuration of LyX was successful.  
Type 'make' to compile the program, 
and then 'make install' to install it.
EOF
fi])