Given that we have not supported releases older than 8.3 for quite a
while, do we need to keep this in extend.sgml any longer?
<caution> <para> Changing <varname>PG_CONFIG</varname> only works when building against
<productname>PostgreSQL</productname>8.3 or later. With older releases it does not work to set it to anything
except <literal>pg_config</>; you must alter your <varname>PATH</> to select the installation to build against.
</para> </caution>
cheers
andrew