Deciding on a set of libs to use is essential for such a system. libs are large and applications should be designed not to require any "exotic" libs.
Ideally, all applications should share a minimal common set. For MiniRTL, this set is:
ld-2.0.7.so libc-2.0.7.so libcrypt-2.0.7.so libdl-2.0.7.so libncurses.so.4 libnsl-2.0.7.so libnss_db-2.0.7.so libnss_dns-2.0.7.so libnss_files-2.0.7.so libresolv-2.0.7.so libss.so.2.0 libutil-2.0.7.so libuuid.so.1.1