thread-db.o, lin-lwp.o, and proc-service.o should work just fine.
XM_CLIBS=
NAT_FILE= nm-linux.h
-NATDEPFILES= infptrace.o solib.o inftarg.o fork-child.o corelow.o s390-nat.o linux-thread.o core-aout.o core-regset.o
+NATDEPFILES= infptrace.o solib.o inftarg.o fork-child.o corelow.o s390-nat.o core-aout.o core-regset.o
# post 5.0 natdepfiles.
NATDEPFILES+= thread-db.o lin-lwp.o proc-service.o
LOADLIBES = -ldl -rdynamic