Compiling 32-bit applications in 64-bit openSUSE (C++)

I can’t find the answer to this anywhere. According to #kdevelop, I need GCC to have --enable-multilib as part of it’s compile so that I am able to compile 32-bit applications on 64-bit openSUSE, but I can’t find the package that does this.

I’m using openSUSE 11.0. Any help is appreciated.