build ruby-2.0.0-p0 on smartos / illumos, including commonly-used libs/headers, etc - tested on smartos_bas64_1.9.1

ruby-2.0.0-p0 on smartos

## curl the raw version of this gist like this:
## curl -s -L https://gist.github.com/bixu/5316445/raw/[revision]/ruby-2.0.0-p0+on+smartos | bash

pkgin -y install build-essential libyaml readline libxml2 libxslt postgresql92-client

git clone git://github.com/sstephenson/rbenv.git ~/.rbenv

git clone git://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build

echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile

echo 'eval "$(rbenv init -)"' >> ~/.bash_profile

exec $SHELL -l

wget -N http://ftp.ruby-lang.org/pub/ruby/2.0/ruby-2.0.0-p0.tar.gz

tar -xvf ruby-2.0.0-p0.tar.gz

cd ruby-2.0.0-p0

mkdir -p $HOME/.rbenv/versions/2.0.0-p0

bash ./configure 'CFLAGS=-m64 -std=gnu99' 'CXXFLAGS=-m64' 'LDFLAGS=-m64' --prefix=$HOME/.rbenv/versions/2.0.0-p0 --enable-shared --disable-install-doc --disable-install-capi --with-opt-dir=/opt/local

make

make install

rbenv global 2.0.0-p0

rbenv rehash

## speshial shit for sqlite3 and ImageMagick:
gem install sqlite3-ruby -- --with-sqlite3-include=/opt/local/include --with-sqlite3-lib=/opt/local/lib

pkgin -y install ImageMagick pkg-config

Thanks, André.

Also, CFLAGS like -O3 may need to be set manually, even on the latest rbenv: rbenv/ruby-build#352