Install Ruby 1.9 from source

install_ruby19_from_source.sh

#!/bin/bash
#
# Install Ruby 1.9 from source
#
# Author : Scott Barr
# Date   : 7 Jan 2010

VERSION=ruby-1.9.1-p378

cd /usr/local/src
wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/${VERSION}.tar.gz
tar -zxf ${VERSION}.tar.gz
cd ${VERSION}
./configure --program-suffix=19

#
# On Debian Lenny, you may need to dodge a gcc bug which exists at Dec 2009 
# which causes parse.c to hang when compiling.
#
# Edit the resulting Makefile to change the line from…
#   optflags = -O2
# to
#   optflags = -O3
#

make
sudo make install