Oops -- misspelled the macro. Thanks to Ralph for catching the

error...

This commit was SVN r14508.

opal/util/sys_limits.c

@@ -76,7 +76,7 @@ int opal_util_init_sys_limits(void)
         opal_sys_limits.num_files = rlim.rlim_cur;
     }
 
-#if HAVE_RLIMIT_NPROC    
+#if HAVE_DECL_RLIMIT_NPROC
     /* get/set the system limits on number of child procs we can have open */
     if (getrlimit (RLIMIT_NPROC, &rlim) < 0) {
         opal_output(0, "getrlimit (RLIMIT_NPROC) failed: %s\n", strerror(errno));