# build_archive --- update the library source archive

   declare _search_rule = "^int,=bin=/&,&,^var"
   declare opt

   case [arg 1]
      when "-delete"
         set opt = "d"
      when ""
         set opt = ""
      out
         error "Usage:  build_archive [-delete]"
   esac

   cd src

  ### See if there are extraneous files in 'src':
   lf -c | _
      find ".[cprs]$" -x | _
      find ".pl[gp]$" -x >\lrb[line]

   if [file -nz lrb[line]]
      echo "WARNING: the following files in src won't be archived:"
      echo ""
      lam -i"   " \lrb[line]
      echo ""
      tlit @n "" 'Type "ok" if you want to continue: '
      if [cmp [set =]"" ~= "ok"]
         cd \
         error
      fi
   fi

  ### Add the files to the archive:
   lf -c >\lrb[line]
   if [file -nz \lrb[line]]
      \lrb[line]> ar -u[opt] \src.a -n
   fi

   cd \
   del lrb[line]