mariadb/cmake/stack_direction.c
2011-06-30 17:46:53 +02:00

33 lines
977 B
C

/*
Copyright (c) 2009 Sun Microsystems, Inc.
Use is subject to license terms.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/* Check stack direction (0-down, 1-up) */
int f(int *a)
{
int b;
return(&b > a)?1:0;
}
/*
Prevent compiler optimizations by calling function
through pointer.
*/
volatile int (*ptr_f)(int *) = f;
int main()
{
int a;
return ptr_f(&a);
}