load_command
------------

Load a command into a running CMake.

::

  load_command(COMMAND_NAME <loc1> [loc2 ...])

The given locations are searched for a library whose name is
cmCOMMAND_NAME.  If found, it is loaded as a module and the command is
added to the set of available CMake commands.  Usually, TRY_COMPILE is
used before this command to compile the module.  If the command is
successfully loaded a variable named

::

  CMAKE_LOADED_COMMAND_<COMMAND_NAME>

will be set to the full path of the module that was loaded.  Otherwise
the variable will not be set.
