Trouble Compiling Cilk Plus Program

Question

I am running into trouble while trying to complie my Cilk Plus program. Basically when I run: g++ -o reducer reducer.cpp , I get the following error:

-fcilkplus must be enabled to use '_Cilk_for'

I've included cilk/cilk.h & cilk/reducer.h, but I am not sure what exactly is causing this problem. The code represents a simple custom reducer, nothing special. Here is how the loop looks where error occurs:

cilk_for(unsigned int i = 0; i<5 ; i++){

    //code

}

Note: I even tried using _Cilk_for, still getting the same error.

Answer 1

You need to add enabling the cilk plus , and linking to the library, to your build.

Your build should be:

g++ -fcilkplus -lcilkrts -o reducer reducer.cpp

For further reference see Intel documentation