Useful CMake functions

CMake is a great tool, but I always keep searching on how to do this and that. Time to make a list again…

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Checking the G++ compiler version:

execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion OUTPUT_VARIABLE G++_VERSION)
     if (G++_VERSION VERSION_LESS 4.7)
          message(SEND_ERROR "You need at least G++ 4.7 to compile!")
endif()

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Appending entries to a list:

LIST(APPEND 
     bla.h
) 

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Creating filters in Visual Studio projects:

source_group("" REGULAR_EXPRESSION \\/.*)

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Custom install commands

To print a message during the install process add:

install(CODE "MESSAGE(\"Casting spell\")")

To run a shell command during the install process add:

install(CODE "execute_process(COMMAND 'echo Creating magic')")

Also see this. More CMake install info is here.