[CMake] Custom Command Execution

[th.tom at gmx.de]

Hi,

I have the following CMakeLists.txt:

---------
cmake_minimum_required(VERSION 2.6)
MESSAGE (" CMAKE TEST ")

ADD_CUSTOM_COMMAND (TARGET Hello PRE_BUILD
                    COMMAND ${CMAKE_COMMAND} -E echo "Prebuild execution" 
                    COMMENT "Information string for prebuild execution"                    
)

ADD_EXECUTABLE ( Hello abc.cpp )
---------

Why is the custom command not executed? Is it meat different?

- Tom