JRV problem with pg_upgrade

Hello,

I'am a database administrateur and I get trouble to upgrade database postgres
from 8.4.6 to 9.2.3.

During pg_upgrade, I can't start the old cluster with parameter -c
listen_addresses=''

This syntax work to start the old cluster and to access to the database

"/distrib/postgresql/app/chfdba/produit/8.4.6/bin/pg_ctl" -w -l
"pg_upgrade_server.log" -D "/distrib/postgresql/data/chorus_formulaires/data"
-o "-p 50432 -c autovacuum=off

-c autovacuum_freeze_max_age=2000000000 -c listen_addresses='*' -c
unix_socket_permissions=0700" start

This syntax doesn't work to start the old cluster

"/distrib/postgresql/app/chfdba/produit/8.4.6/bin/pg_ctl" -w -l
"pg_upgrade_server.log" -D "/distrib/postgresql/data/chorus_formulaires/data"
-o "-p 50432 -c autovacuum=off

-c autovacuum_freeze_max_age=2000000000 -c listen_addresses='' -c
unix_socket_permissions=0700" start

But pg_upgrade use this "bad" syntax even I try to force -c
listen_addresses='*'

pg_upgrade -c -d /distrib/postgresql/data/chorus_formulaires/data -D
/distrib/postgresql/data/chorus_formulaires/data/9.2.3 -b
/distrib/postgresql/app/chfdba/produit/8.4.6/bin -B
/distrib/postgresql/app/chfdba/produit/9.2.3/bin -o "-c listen_addresses='*'"

more pg_upgrade_server.log

could not connect to old postmaster started with the command:

"/distrib/postgresql/app/chfdba/produit/8.4.6/bin/pg_ctl" -w -l
"pg_upgrade_server.log" -D "/distrib/postgresql/data/chorus_formulaires/data"
-o "-p 50432 -c autovacuum=off -c autovacuum_freeze_max_age=2000000000

-c listen_addresses='*' -c listen_addresses='' -c
unix_socket_permissions=0700" start

Failure, exiting

I don't know how to workaround this problem ?

Best regards,

Jacques ravalet