I have ruby-1.8.0 installed and working nicely on OS 10.2.6 so long as 
I don't require anything from the ext folder, such as socket or tcltk. 
Ruby is installed, from source, in /usr/bin. I no longer recall for 
sure, but I believe I got the tar file from ruby-lang.org. From a look 
at the socket folder (see below), it appears that socket.c is 
compiling, but not linking. I don't really know where it is supposed to 
be, but it is not in /usr/bin/ or /usr/lib/ruby/. Any help?

Gary Palmer

/Users/gary/src/ruby-1.8.0/ext/socket
/Users/gary/src/ruby-1.8.0/ext/socket/addrinfo.h
/Users/gary/src/ruby-1.8.0/ext/socket/depend
/Users/gary/src/ruby-1.8.0/ext/socket/extconf.rb
/Users/gary/src/ruby-1.8.0/ext/socket/getaddrinfo.c
/Users/gary/src/ruby-1.8.0/ext/socket/getnameinfo.c
/Users/gary/src/ruby-1.8.0/ext/socket/Makefile
/Users/gary/src/ruby-1.8.0/ext/socket/MANIFEST
/Users/gary/src/ruby-1.8.0/ext/socket/mkmf.log
/Users/gary/src/ruby-1.8.0/ext/socket/socket.bundle
/Users/gary/src/ruby-1.8.0/ext/socket/socket.c
/Users/gary/src/ruby-1.8.0/ext/socket/socket.o
/Users/gary/src/ruby-1.8.0/ext/socket/sockport.h