Init

cmake/stack_direction.c

@@ -0,0 +1,31 @@
+/* Copyright (C) 2009 Sun Microsystems, Inc
+ 
+ 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);
+}