From source installation of required libraries for rubies, it is automatically triggered by:
rvm autolibs rvm_pkg
You should not have to use it manually but just in case:
Usage:
rvm pkg {install,uninstall} {readline,iconv,curl,openssl,zlib,autoconf,ncurses,pkgconfig,gettext,glib,mono,llvm,libxml2,libxslt,libyaml,epel}
rvm pkg remove # to start fresh
ree_dependencies
installs zlib
, ncurses
, readline
, openssl
and iconv
in this order.