I have been using PostgreSQL 8.2.3 under Redhat Enterprise Linux AS 4, but when I tried to install the postgresql-plperl RPM I got a sequence of dependency failures, and remedying them got me into an apparently infinite loop of dependencies on libpq.so versions. I had versions 3 and 4 in /usr/lib and version 5 in /usr/local/pgsql/lib, but posgresql-libs still reported it needed version 3 and couldn't find it. So I installed compat-postgresql-libs-3-3PGDG and tried again. Now postgresql-libs complains it can't find version 4. I haven't found any comprehensive guide to shared library problems associated with PostgreSQL, and it's a shame, since everything else about PostgreSQL seems excellently documented. I've given up, and decided to return to Redhat's somewhat older version. It installs itself from Red Hat Network without any errors, and I probably won't get library incompatibilities when doing future updates.
