C-like macros in OCaml

[Raj B <rajb@rice.edu>]

Hi there

Is there any way I can achieve the use of C-like preprocessor macros  
in OCaml?
i.e.

#define FOO 1

etc.

I am using an array of bits (a bitset) where each bit represents a  
flag, and i would like to
access this set by using names rather than remembering which index in  
the array represents which flag.

Similarly, is there any way of getting a C-like enumeration? e.g.

enum days {Mon = 1, Tue, Wed...}

I guess that OCaml does not provide these by default, but I wonder if  
someone has done some camlp4 magic
to use these.

Thanks
Raj