Just upgraded to 0.69

1. When specifying -o, it simply reports

    Error: unrecognized switch '-o'

It'd be better to say

  Error: unrecognized switch '-o'. Feature no longer supported. Use '-of' or
'-od'

2. When there is a space between -of and the file (as there was in my hastily fixed makefile), it just reports

  Error: unrecognized switch '-of'

It should say

  Error: switch '-of' requires filename, as in '-of<filename>'