OGR and PostGIS providers not working under MapGuide on Ubuntu 7.10

[jbirch]

From Jo Cook on the mapguide-users mailing list:

I have managed to build MGOS2 on Ubuntu 7.04 with help from Jason's great instructions on the wiki. However, when I try and make a new data connection with either postgis or ogr I get errors. 

In mapguide studio when I try to make a postgis connection I get the default feature editor screen and errors in my error log saying CLNT_8_UNABLE_TO_LOAD_LIBRARY.

When I make an ogr connection I get the proper editor (with data source and readonly connection options) but I get a connection failed error when I try and test the connection. The error log says CLNT_4_PROVIDERNOTREGISTERED.

I have tested my connection string with ogrinfo and it works, and I have checked that both providers are in my providers.xml file. 

I have also tested both connection strings with testconnection in the web tier test suite and both give me the CLNT_4_PROVIDERNOTREGISTERED error.

Has anyone successfully managed to use either of these connectors with Ubuntu, and how do I begin debugging the problem?

Many thanks

Jo