XFree86/lib/X11/lyx/configure.cmd
tries to guess the version of REXX (classical/Object) around
the line 159 and use appropriate syntax for stream() function.
Here is the original code:

159:  if rxfuncquery(SysAddRexxMacro) then
160:    rc=stream('chkconfig.sed','c','seek +'size)
161:  else
162:    rc=stream('chkconfig.sed','c','seek + 'size' write')

I have a report that it doen't work for certain versions of
classical REXX.  In that case comment out the line 159, 161, 162.
