When you have uncompressed and untarred the MudOS_0.9.15.tar.Z file, the following directories (and possibly others) should have been automatically created: src, bin, doc, etc, and mudlib.
Perform the following steps:
Edit the Makefile (or GNUmakefile if you have GNU make) using your favorite editor. Change the INSTALL_DIR macro to point to an appropriate bin directory (remember to save your changes).
Choose one of SYSMALLOC, WRAPPEDMALLOC, or DEBUGMALLOC. If you are using a NeXT or an RS/6000, do not choose BSDMALLOC or SMALLOC (it won't link, you'll be wasting your time... hack away if you like but consider yourself forewarned). If you are using an HP, you probably should use smalloc or bsdmalloc (use SYSMALLOC in options.h and uncomment SMALLOC* or BSDMALLOC* in the Makefile) since the HP system malloc is really slow. Note that smalloc is much more space (overhead) efficient than bsdmalloc. Be sure to read doc/driver/malloc before modifying the driver source code.
If you do not choose to set a value for CONFIG_FILE_DIR you will need to specify the full path to the config file each time you start the driver (e.g.: driver /usr/local/mud/etc/config.basis). If you do specify a value for CONFIG_FILE_DIR (and you put the config.basis file in that directory), then you may start the driver using: driver config.basis
If errors occur at this stage, then you may be able to correct them by making additional changes to Makefile, options.h, or port.h. If 'make' prints some message similar to "/bin/ld: Undefined symbols: _ualarm" then that means your machine does not have the ualarm() system call. In this case, you could correct the problem be uncommenting the UALARM definitions in the Makefile. If the install -c command itself fails, then you will need to copy the driver and addr_server to the bin directory manually (using the cp or mv command). If /bin/ld prints an error regarding _getrusage, you will need to undefine RUSAGE in port.h. Messages regarding _random, _drand48, and _fchmod may be handled similarly. If you make changes to options.h, you will need to type 'make clean' and then 'make install' once more.