Daniel, Well if the command.... LD_TRACE_LOADED_OBJECTS=1 LD_BIND_NOW=1 LD_TRACE_PRELINKING=t \ /lib/ld-2.3.2.so /usr/lib/libefs.so.1 | grep ^undefined ...is correct, the same thing can be obtained a lot simplier with only... ldd -d -r /usr/lib/libefs.so.1 | grep ^undefined At least I seem to get the same symbols here with that and 'ldd -d -r' is what Jakub recommended for searching for these undefined weak symbols. Jack