Apache Reference: http_core, AddModule

AddModule

Add Available Module to the List of Usable Modules
Syntax: AddModule source-name [source-name ...]
Example: AddModule mod_rewrite.c
Since: Apache 1.2

Apache can have modules compiled in or loaded as DSO even those modules are not actually activated. This directive can be used to enable those modules by adding them to the internal list of usable modules. By default, Apache has a pre-loaded list of activated modules. This list can be cleared with the ClearModuleList directive. Be aware that the argument source-name is really the file name of the primary source file of the module, (usually ``mod_name.c'').