The libtcl.cfg and the libtcl64.cfg files (collectively, libtcl*.cfg file) are the driver configuration files. These files contain information about these types of drivers used by Open Client and Open Server products:
Directory drivers
Security drivers
Network (Net-Library) drivers
A driver is a Sybase library that provides Open Client and Open Server software with a generic interface to an external service provider. This allows Open Client and Open Server to support multiple service providers. For example, Open Client can use the DCE directory driver to communicate with the DCE directory service.
The purpose of the libtcl*.cfg files is to provide configuration information such as driver, directory, and security services for Open Client and Open Server and for Open Client and Open Server-based applications. Both libtcl.cfg and libtcl64.cfg are provided on 64-bit platforms. 32-bit applications (on 64-bit platforms), such as dsedit and srvbuild, look up the libtcl.cfg file, while 64-bit applications look up the libtcl64.cfg file for configuration information.
The libtcl*.cfg file determines whether the interfaces file or LDAP directory services should be used. If LDAP is specified in the libtcl*.cfg file, the interfaces file is ignored unless the application specifically overrides the libtcl*.cfg file by passing the -I parameter while connecting to a server.
