MudOS hints file for HP-UX: in the Makefile, comment out RESOLV uncomment ALLOCA_C and ALLOCA_O uncomment UALARM_C and UALARM_O for maximum optimization with cc, use: OPTIMIZE=+O3 +Obb3000 uncomment EXTRALIBS=-lBSD HP-UX's malloc performs terribly in profiles, you should probably use BSDMALLOC in options.h Varargs doesn't function properly in gcc 2.2 for HP (and possibly later versions of gcc will be messed up as well). Part of the MudOS driver depends on varargs (the vprintf). You'll probably need to use cc to get it to work.