forgotten function ?

[Omar Siam]

smbd/password.o: In function `check_user_equiv':
smbd/password.o(.text+0x16d8): undefined reference to
`yp_get_default_domain'
lib/username.o: In function `user_in_netgroup_list':
lib/username.o(.text+0x4f6): undefined reference to
`yp_get_default_domain'
lib/access.o: In function `string_match':
lib/access.o(.text+0x10e): undefined reference to
`yp_get_default_domain'

thats the output when i try to compile the CVS-tree
my system is  linux 2.2.5 with glibc 2.0.6
can anyone help