Configure CMakeList properly to work with OpenMPI (c++)

Hello,

I have lot of difficulties to configure CLion to have correct color syntax and to be able to compile my project.

If I use the C syntax, there is no problem, but I want to use the c++ syntax, and I don't know where I have to indicates it to Clion.

Here is my CMakeLists.txt :

http://pastebin.com/spZ8Cysi

I'm not sure that this :

include_directories({MPI_INCLUDE_PATH})

is useful at all.

Thanks if someone can help me ! :)