Compile files based on bdf on macOS

[Nick Clifton]

Hi Peng,

>    "__hex_value", referenced from:

This symbol, and most of the others in your list, is supplied by the libiberty library.
Ie you need to add -libiberty to your command line.


>    "_compress", referenced from:

This symbol is supplied by the z library.  Ie: -lz

Cheers
   Nick