[CMake] How to compile MPI code

[Mª Dolores Villalobos Ortiz]

>What do you mean with "it doesn't run correctly"? Does it not even
start? How do you start your program?

------------------------------------------------------

My program's code is:

#include <iostream>
using namespace std;
#include "mpi.h"

int main( int argc, char * argv[] )
{

  int node;
  int num_nodes;
  int i, buf;

  MPI::Init(argc, argv);            
  node = MPI::COMM_WORLD.Get_rank();
  num_nodes = MPI::COMM_WORLD.Get_size();

  std::cout << "I am node " << node << std::endl;

  if ( node == 0 ) {
    std::cout << "I am node " << node << std::endl;
    std::cout << "Num threads (Get_size) -> " << num_nodes << std::endl;
    }
  else
    {  

    std::cout << "I am node " << node << std::endl;
    }
  MPI_Finalize();
  return 0;
}
------------------------------------------------------

And, in order to run the program, I type in Ubuntu's terminal:

mpiexec -n 2 ./main_program

-------------------------------------------------------------

The program write in terminal:

I am node 0

I am node 0

Num threads (Get_size) -> 1

I am node 0


I am node 0


Num threads (Get_size) -> 1

instead of:

I am node 0
I am node 0
Num threads (Get_size) -> 2
I am node 1
I am node 1


Lola





-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.cmake.org/pipermail/cmake/attachments/20110622/4105d84d/attachment.htm>