11/26   what preprocessor macro is defind on FreeBSD so that I can write
        conditional code only for FreeBSD? i am using gcc...
        What about solaris? Thanks.
        \_ You can use __FreeBSD__ and __sun to tell the difference between
           FreeBSD and Solaris; you can also use __i386 and __sparc if you
           want to know the CPU type.  (These all work with Sun's C compiler
           as well as with gcc.)  --mconst