could not create shared memory segment: Function not implemented

I'm installing 7.4.6 source under Windows 2000/cygwin and can't seem
to get the initdb step no matter what. The following is what I get.
The archive answers on this are either incomplete or unclear. Can
someone please help?

--Randy

$ /usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data
The files belonging to this database system will be owned by user "yates".
This user must also own the server process.

The database cluster will be initialized with locale C.

creating directory /usr/local/pgsql/data... ok
creating directory /usr/local/pgsql/data/base... ok
creating directory /usr/local/pgsql/data/global... ok
creating directory /usr/local/pgsql/data/pg_xlog... ok
creating directory /usr/local/pgsql/data/pg_clog... ok
selecting default max_connections... 10
selecting default shared_buffers... 50
creating configuration files... ok
creating template1 database in /usr/local/pgsql/data/base/1... FATAL: could not create shared memory segment: Function not implemented
DETAIL: Failed system call was shmget(key=1, size=1081344, 03600).

initdb: failed
initdb: removing data directory "/usr/local/pgsql/data"

yates(at)leibniz ~
$ ps
PID PPID PGID WINPID TTY UID STIME COMMAND
I 1264 1 1264 1264 con 400 22:03:23 /usr/bin/bash
1500 1264 1500 1496 con 400 22:03:53 /usr/bin/xterm
508 1500 508 812 0 400 22:03:53 /usr/bin/bash
1540 1264 1540 1560 con 400 22:03:55 /usr/bin/xterm
1556 1540 1556 1536 1 400 22:03:55 /usr/bin/bash
I 984 1556 984 1192 1 400 09:04:03 /usr/bin/less
1644 508 1644 1676 0 400 10:28:32 /usr/sbin/cygserver
1664 508 1664 1712 0 400 10:29:58 /usr/bin/ps

yates(at)leibniz ~
--
% Randy Yates % "She's sweet on Wagner-I think she'd die for Beethoven.
%% Fuquay-Varina, NC % She love the way Puccini lays down a tune, and
%%% 919-577-9882 % Verdi's always creepin' from her room."
%%%% <yates(at)ieee(dot)org> % "Rockaria", *A New World Record*, ELO
http://home.earthlink.net/~yatescr