I tried RC1 on HP-UX 11.00 with gcc and apart from a few minor issues,
things look fine.
I suggest not to use those functions:
dcc.c: In function 'dcc_process':
dcc.c:129: warning: incompatible implicit declaration of built-in function 'bzero'
dcc.c:196: warning: incompatible implicit declaration of built-in function 'bcopy'
The first is needed due to the HP-UX resolver library. I don't know
when res_state was defined, otherwise I would have used __RES to check
if it needs to be defined. 19931104 does not have it yet.