[postgis-users] Configure failure on Ubuntu 9.10

[Chris Hill]

Dear List,

I have installed Postgres 8.4.1, Proj4 and GEOS librarys on Ubuntu
9.10 yet when I attempt to ./configure Postgres 1.4.0 I receive this
error:

[ ... ]
checking libpq-fe.h usability... no
checking libpq-fe.h presence... no
checking for libpq-fe.h... no
configure: error: could not find libpq-fe.h

The file libpq-fe.h which configure cannot find is present in
/usr/local/pgsql/include.

Is there a way I can tell configure where to look for this file?

Many thanks

Chris