Newbie: pg_hba.conf question

Hi all,
I'm trying to use psql on SGI irix 6.
The build and install process seems to be ok, but
when I try to run the regress test suite, the
client commands failed. The postmaster had
started correctly, but no way to connect it.

The error looks like a well known one (see chapter 12 of
admin guide), but I cannot solve it:

The client says:

marcvs> psql
psql: No pg_hba.conf entry for host localhost, user marcvs, database marcvs

The pg_hba.conf in the PGDATA actually contains a line with:

local all trust

- Any well known install problem ?

-MP-

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