Hello.
I am getting an error that i wasn't getting before.

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test.c: In function 'main':
test.c:63: error: 'MPI_COMM_WORLD' undeclared (first use in this function)
test.c:63: error: (Each undeclared identifier is reported only once
test.c:63: error: for each function it appears in.)
test.c:111: error: 'MPI_INT' undeclared (first use in this function)

---

line 63  : MPI_Comm_size(MPI_COMM_WORLD, &numnodes);
line 111:MPI_Scatter( array, PARTS, MPI_INT, my_array, PARTS, MPI_INT, master, MPI_COMM_WORLD);


I am under a 2.6.23-gentoo-r5 cluster with gcc version 4.2.2 (Gentoo 4.2.2 p1.0)