Hi, In message "[ruby-talk:16919] Re: Problem running irb with Ruby 1.6.4 under FreeBSD 4.0" on 01/06/27, Bob Alexander <balexander / rsv.ricoh.com> writes: |Here it is. Hmm... __FreeBSD__ is definitely less than 3: | |$ gcc -E -dM -x c /dev/null |#define __FreeBSD__ 1 That's the cause. Could anybody who is FreeBSD guru tell me how to know the exact version of the OS? knu? matz.