problems to install PostgreSQL

Hello all,

i'm trying to install postgresql 8.1.3
on AIX 5.2 RISC 6000

the steps
- ./configure
- gmake
- gmake install

are OK

so i created /usr/local/pgsql/data
but when ran
- initdb -D /usr/local/pgsql/data

had the following result :

"
The files belonging to this database system will be owned by user
"postgres".
This user must also own the server process.

The database cluster will be initialized with locale en_US.
The default database encoding has accordingly been set to LATIN1.

fixing permissions on existing directory /usr/local/pgsql/data ... 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_xlog/archive_status ... ok
creating directory /usr/local/pgsql/data/pg_clog ... ok
creating directory /usr/local/pgsql/data/pg_subtrans ... ok
creating directory /usr/local/pgsql/data/pg_twophase ... ok
creating directory /usr/local/pgsql/data/pg_multixact/members ... ok
creating directory /usr/local/pgsql/data/pg_multixact/offsets ... ok
creating directory /usr/local/pgsql/data/base ... ok
creating directory /usr/local/pgsql/data/base/1 ... ok
creating directory /usr/local/pgsql/data/pg_tblspc ... 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 ... child
process was terminated by signal 11
initdb: removing contents of data directory "/usr/local/pgsql/data"
"

I have repeated the installation steps for
8.1.0, 8.1.1, 8.1.2 versions
but I obtained the same result

Many thanx to any that can help.

Greetings
paolo