Is it possible to compile OpenWRT with glibc instead of uClibc? If so, how?

My root filesystem is going to be on an external USB stick (ASUS wl-500 g), so space shouldn't be the problem.

I want to set up a full-blown Samba domain controller on the tiny router, and in uClibc I miss some things like NSS (ability to authenticate agains an LDAP server etc.).