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Compile OpenMp File

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dm83:
Hi everybody,

I'm a new user on this forum so i excuse with you for all my mistakes.

i have to compile a c source file in OpenMp ambient. when i compile the file, the code blocks' compiler don't recognize the parallel regions. In

fact i should add the -fopenmp option to compiler.

How can i do this?

Thank you very very much.

Bye bye all!!!

killerbot:
build options of your project -> Compiler settings -> Other options :
put there the -fopenmp


Maybe you also need to link with an openmp library, it has been some time since I used OpenMP, but I had it working with CB ;-)

dm83:
Thank you but I have already do this but it didn't work.

I have also imported the omp.h library.

What can i do?

dm83:
This is my code:


#include <omp.h>
#include <stdio.h>
#include <stdlib.h>

void main()
{
    int x,nt,tid;

    int ris;

    omp_set_nested(1);

    ris=omp_get_nested();

    if (ris)

    printf("Nested parallelism enabled\n");

    omp_set_num_threads(5);

    #pragma omp parallel private (nt,tid)
    {
          tid = omp_get_thread_num();

          printf("Ciao sono il thread %d\n",tid);

          nt = omp_get_num_threads();

          if (omp_get_thread_num()==1)

          printf("Il numero di threads e': %d\n",nt);
   }

    omp_set_num_threads(3);

   #pragma omp parallel private (x)
    {
          x=x+1;

          printf("Valore = %d\n",x);

   }
}

and this is the response of the compiler:

Prova.c  undefined reference to 'omp_set_nested'
Prova.c  undefined reference to 'omp_get_nested'
Prova.c  undefined reference to 'omp_set_num_threads'
Prova.c  undefined reference to 'GOMP_parallel_start'
Prova.c  undefined reference to 'GOMP_parallel_end'
Prova.c  undefined reference to 'omp_set_num_threads'
Prova.c  undefined reference to 'GOMP_parallel_start'
Prova.c  undefined reference to 'GOMP_parallel_end'

build finished: 8 errors, 0 warnings

oBFusCATed:
Read this please: http://wiki.codeblocks.org/index.php?title=FAQ#Q:_How_do_I_troubleshoot_an_compiler_problem.3F
Also please use code tags for such long pastes

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