[CMake] Determine 32 vs 64 bit cpu

[pellegrini]

Hi all,

I have a program that uses an external library whose path name depends 
on its version (32 or 64 bit).

Is there a direct way in cmake to test whether my cpu is 32 or 64 bit ?

The one I found up to now is the following:

if(CMAKE_SIZEOF_VOID_P EQUAL 8)
    set(arch_64 TRUE)
else()
     set(arch_64 FALSE)
endif()

thanks a lot and merry Christmas !

Eric


-- 
Eric Pellegrini
Calcul Scientifique
Institut Laue-Langevin
Grenoble, France