#
# gen_v1
# ------
#
# generate variables with one number marked as #
# parameters:
#   $1    start index (1 or 2)
#   $2    maximum number of elements to generate
#         if examples are generated this value is greater
#         than the number contained in the master variable
#   $3    name of master variable
#   $4..  names of dependent variables
#
gen_v1()
{
   start=$1
   shift
   lto=$1
   shift
   iname=$1
   shift
   names=$*

   # check highest index
   eval [ "\$${iname}" -gt $lto ] && eval lto=\$${iname}
   eval [ "\$OLD_${iname}" -gt $lto ] && eval lto=\$OLD_${iname}

   idx=$start
   while [ $idx -le $lto ]
   do
      for name in $names
      do
          vname=`echo $name | sed "s|#|$idx|"`
          eval val=\${OLD_$vname:=\$$vname}
          echo "$vname='$val'"
      done
      idx=`expr $idx + 1`
   done
}

update_config()
{
   # 1. Step prepare old configuration for sourcing
   #    remove leading spaces and tabs
   #    use only lines starting with capital letters
   #    precede each name with OLD_

   cat ${OLD_CONFIG} |       \
   sed 's|^[[:blank:]]*||' | \
   grep '^[A-Z]'           | \
   sed 's|^.*|OLD_&|' > ${OLD_CONFIG}.old

   # 2. Step source the file

   . ${OLD_CONFIG}.old

   # 3. Step remove the file

   rm -f ${OLD_CONFIG}.old

   # 4. Step source the package configuration

   if [ ! -f ${PKG_CONFIG} ]; then
      mecho -error "internal error: ${PKG_CONFIG} does not exist"
      exit 1
   else
      . ${PKG_CONFIG}
   fi

   # 5. clear configuration file
   > $NEW_CONFIG

   # 6. Step generate the new configuration

   (