PostgreSQL Essential Reference

Library Files

The library files installed by PostgreSQL vary depending on a number of factors; compile-time options, specific packages, versions, and ancillary programs all determine what libraries are installed. Therefore, the following is a listing of the most common libraries installed and their typical locations. The → symbol indicates a symbolic link, and the version numbers have been replaced with an “X” or a “Y” to indicate major and minor version numbers. Substitute as appropriate.

Source: /usr/local/pgsql/lib

RedHat: /usr/lib

Library files for ecpg:

libecpg.a 
libecpg.so → libecpg.so.X.Y.Z 
libecpg.so.X → libecpg.so.X.Y.Z 
libecpg.so.X.Y.Z 

Library files for simplified integration with the libpq library:

 libpgeasy.a libpgeasy.so → libpgeasy.so.X.Y ...