Problem With Mysql2 Gem Installation on Lion
Yesterday I tried to install gem mysql2 but it complained to missing libraries.
After installation of macports I tried with sudo port install mysql5-devel to install libraries but it failed again.
The problem is in gcc compiler so after some searching on google I found solution on this site.
In short solution is in these 2 commands where you do cleanup of mysql5-devel and then build with llvm-gcc compiler.