compiling version 7.2.2 on AIX 4.3.1 can't find F_OIDEQ

Hi. I'm trying to install postgres 7.2.2 on AIX 4.3.1 (on a  powerpc bull)
and I get this message on gmake:
gmake[4]: Entering directory
`/desa/postgres/postgresql-7.2.2/src/backend/access/heap'
xlc -O2 -qmaxmem=16384 -qsrcmsg -qlonglong -I../../../../src/include   -c -o
tuptoaste
r.o tuptoaster.c
      914 |
(RegProcedure) F_OIDEQ,

..................................................................a.......a
- 1506-045 (S) Undeclared identifier F_OIDEQ.
      997 |
(RegProcedure) F_OIDEQ,

..................................................................a.......a
- 1506-045 (S) Undeclared identifier F_OIDEQ.

Any ideas?