Ubuntu rails error no such file to load -- openssl

ubuntu-rails-openssl

ENV:
   rvm-ruby  1.9.2  => install dir => gem env | grep 'INSTALLATION DIRECTORY'  => rvm-ruby install dir_path
   rails 3.0.7

CAUSE:
   run scaffold generator: rails g scaffold modelname column:string ...

Fix Steps:
   1) ensure openssl has been installed => which openssl  => /usr/bin/ssl
   
   2) cd ./rvm/src/ruby-verson/ext/openssl

   3) ruby extconf.rb --with-openssl-include=/usr/include/openssl/ --with-openssl-lib=/usr/lib/ssl/

   4) make & make install