Bill Eldridge <bill@cognet.ucla.edu> reports: To get perl to compile on Nexts, you need to combine the ansi and bsd headers: cd /usr/include mkdir ansibsd cd ansibsd ln -s ../ansi ln -s ../bsd Then follow the configuration instructions for Nexts, *replacing* all mention of -I/usr/include/ansi or -I/usr/include/bsd with -I/usr/include/ansibsd. (There might be more elegant solutions, but this is how I did it, and it's quick and so far painless).