Install gperf if you need a program that generates perfect hash functions.
-rwxrwxrwx 1 root root 111295 Feb 13 2000 /usr/bin/gperf drwxr-xr-x 2 root root 0 Feb 13 2000 /usr/doc/gperf-2.7 -rw-r--r-- 1 root root 399 Apr 14 1998 /usr/doc/gperf-2.7/NEWS -rw-r--r-- 1 root root 956 Mar 11 1995 /usr/doc/gperf-2.7/README -rw-r--r-- 1 root root 52768 Apr 14 1998 /usr/doc/gperf-2.7/gperf.html -rw-r--r-- 1 root root 18271 Feb 13 2000 /usr/info/gperf.info.gz -rw-r--r-- 1 root root 454 Feb 13 2000 /usr/man/man1/gperf.1.gz