CMake : how to use bash command in CMakeLists.txt

Question

I'm wondering how I can use bash command in CMakeLists.txt. What I want is to get the number of processor retrieved using :

export variable=`getconf _NPROCESSORS_ONLN` 

and set NB_PROCESSOR to variable using something like :

SET (NB_PROCESSOR variable) 

So my question is how can I use the getconf command in CMakeLists.txt and how can I use the result (stored in variable) in CMake SET command?

Answer 1

This seems to do the trick, and saves the "set" too.

execute_process(COMMAND getconf  _NPROCESSORS_ONLN                 OUTPUT_VARIABLE NB_PROCESSOR)