The literal constant on line 164 of lib/regex_internal.h needs to be explicitly declared as an unsigned long. HP-UX's preprocessor (at least on 10.20) will fail a comparison between 0xffffffff and 0xffffffffUL. The constant in limits.h is explicitly UL, so BITSET_WORD_MAX doesn't get properly defined on HP-UX 10.20.
-- Jonathan C. Patschke Manufacturing Software Support Centaur Technology
