Re: bytecomp warning for CL functions

[Richard Stallman]

    I had installed a hack that tries to notice when you call a function
    that will not be available at runtime (because the library
    was loaded via (eval-when-compile (require 'LIB)) as is done for CL).

If you can make your code superior to Dave's code that I installed and
then built on, please go ahead and put it in.  His code has a list of
specific CL functions in it, and also checks the function name.
If your code check both kinds of cases and handles both properly, it probably
does everything right.