[CMake] Create custom "make help"

[DKLind]

Is there a way to create a custom help that is displayed with "make help"?

I have tried to implement this using the instructions in this thread:  </a>
<http://cmake.3232098.n2.nabble.com/How-to-list-user-definable-CMake-variables-td5578249.html> 

add_custom_target(HelpMe
  COMMAND  ${CMAKE_COMMAND}
-DCMAKE_MODULE_PATH=${CMAKE_CURRENT_SOURCE_DIR} --help-module HelpMe
  COMMENT "Display User defined help") 

When I run "make HelpMe" I get the following error: Argument "HelpMe" to
--help-module is not a CMake module.



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