+* incompatible change: The old SB-EXT:OPTIMIZE-INTERFACE declaration
+ is no longer recognized. I apologize for this, because it was
+ listed in SB-EXT as a supported extension, but I found that
+ its existing behavior was poorly specified, as well as incorrectly
+ specified, and it looked like too much of a mess to straighten it
+ out. I have enough on my hands trying to get ANSI stuff to work..