Install ruby 1.9.2 on snow leopard : readline compile error

Even if i had readline installed on my system in /usr/local, i still get the same (readline) error at compile of ruby 1.9.2 when i try to install it with rvm.

I remedy that compile error like that:

• (re)install libxml2:

tar xzvf libxml2-2.7.3.tar.gz  
cd libxml2-2.7.3 
./configure --with-python=/System/Library/Frameworks/Python.framework/Versions/2.3/ 
make 
make install

• (re)install readline

curl -O ftp://ftp.cwru.edu/pub/bash/readline-6.0.tar.gz
tar xvf readline-6.0.tar.gz
cd readline-6.0
./configure && make && make install

• Then install readline via rvm package :

rvm package install readline