title: How to enable OpenMP support in the Makefiles / GCC
body: <p>I am trying to parallelize for loops by using OpenMP for two different projects, but OpenMP has an issue with Makefile: <code>ignoring #pragma omp parallelize for</code>. So I need to change the Makefile so it can support OpenMP but i don't know how.</p>
  
  <pre><code>all: lbm 
  
  lbm: lbm.c main.c 
      gcc -o lbm lbm.c main.c -lm
  clean:
      rm -f lbm *.o
  
  all: mcf 
  
  mcf: implicit.c  mcfutil.c  pbeampp.c  pflowup.c   pstart.c   treeup.c mcf.c       output.c   pbla.c     psimplex.c  readmin.c
      gcc -o mcf *.c 
  clean:
      rm -f mcf *.o
  </code></pre>