CLOCK_MAX is a global kernel variable
for SVR5 systems
that is defined in the types.h
as the maximum value of the clock_t type.
The current value corresponds to about
248 days with a signed 32-bit
and a HZ value of 100 ticks-per-second.
SCO OpenServer 5 does not use the CLOCK_MAX variable. The LONG_MAX variable defined in the limits.h header file applies to clock_t because it is defined as a long.