[Pw_forum] stack.c in Mac OS X/Intel

Cesar R.S. da Silva cesards at msi.umn.edu
Tue Mar 4 06:51:36 CET 2008

Problem: Mac OS X does not allow regular users to set stack limits above
certain maximum. Therefore, the esprsso-distribution clib/stack.c fails.

Solution: I patched stack.c to work around this problem. This is the code:

  Copyright (C) 2007 Quantum-Espresso group
  This file is distributed under the terms of the
  GNU General Public License. See the file `License'
  in the root directory of the present distribution,
  or http://www.gnu.org/copyleft/gpl.txt .

#include <stdio.h>
#include <stdlib.h>
#include <sys/resource.h>
#include "c_defs.h"

void F77_FUNC(remove_stack_limit,REMOVE_STACK_LIMIT) (void) {

  struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY };

  if ( setrlimit(RLIMIT_STACK, &rlim) == -1 ) {
    printf("Cannot set stack size to infinity!");
    /* exit(1); */

    if ( getrlimit(RLIMIT_STACK, &rlim) == 0 ) {
      printf("  Trying to set stack size to the maximum");
      printf("    Current Stack limits : %12i  %12i
      rlim.rlim_cur = rlim.rlim_max;
      if ( setrlimit(RLIMIT_STACK, &rlim) == 0 ) {
        getrlimit(RLIMIT_STACK, &rlim);
        printf("      SUCCESS! Stack size set to %12i \n",rlim.rlim_cur);
      } else {
        printf("      Failed! Cannot set stack size to new value");
        perror("      Failed! Cannot set stack size to new value");


Cesar R.S. da Silva, PhD.
Minnesota Supercomputing Institute,
University of Minnesota.
Phone: (612)-624-7425   e-mail: cesards at msi.umn.edu

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