Hi, 
  I see an attachment which is the guide to writing reducers, but not test1.cpp?  

I was able to copy the entire last example and compile without any errors.  Which compiler are you using, and what flags did you pass in to compile the program?

Jim

In the attached test program, "list" is declared as a pointer to a reducer.
        cilk::reducer<IntListMonoid> *list;

In the example in the documentation, the reducer is declared as:
        cilk::reducer<IntListMonoid> list;

Cheers,

Jim

Hm... that is odd...  What does "icpc -V" return, i.e., which version string does it return?

If you use "icc -H", does it bring in the reducer.h file that you think it should be including?  What does your copy of "reducer_list.h" look like?

This question is likely unrelated, but why do you have the preprocessor flags of "-DTIMES_TO_RUN=1 -DCILKM_RTS=1" specified?
Cheers,

Jim

Ah.  You have an older version of the compiler, which has an older version of the header files for reducers.
In the old syntax for reducers, the way to access the reducer view used to be to use "operator ()", i.e., to write:

    list().add_value(i);

In the newer syntax, you use the dereference operator:
    list->add_value(i).

The newer header files are backwards compatible --- they will still take the old syntax, although we consider that syntax to be deprecated.
But the reducer guide was written recently, and uses the newer syntax.

There are probably several ways to fix your problem.  You could (1) update your compiler to the latest 12.1 version, which comes with updated header files, (2) use the old deprecated syntax, or (3) try to patch the reducer.h file to the new syntax.

Is there any difficulty with updating your compiler for your project?  The first option would be the one I would recommend, as the other two are asking for trouble down the line...

Cheers,

Jim