Errors compiling hba.c in current CVS

I get the errors below when compiling on a RH 6.1 system.
I used the following config paramters:
./configure --prefix=/usr/local/pgsql --enable-integer-datetimes --with-pgport=5433

hba.c: In function `parse_hba':
hba.c:590: structure has no member named `ss_family'
hba.c:659: structure has no member named `ss_family'
hba.c:691: structure has no member named `ss_family'
hba.c: In function `ident_inet':
hba.c:1210: structure has no member named `ss_family'
hba.c: In function `authident':
hba.c:1461: structure has no member named `ss_family'
hba.c:1467: warning: unreachable code at beginning of switch statement
make[3]: *** [hba.o] Error 1