extern tree fix_string_type (tree);
struct varray_head_tag;
extern void constant_expression_warning (tree);
-extern void strict_aliasing_warning (tree, tree, tree);
+extern bool strict_aliasing_warning (tree, tree, tree);
extern void empty_if_body_warning (tree, tree);
extern void warnings_for_convert_and_check (tree, tree, tree);
extern tree convert_and_check (tree, tree);