extern void hook_void_tree (tree);
extern void hook_void_tree_treeptr (tree, tree *);
extern void hook_void_int_int (int, int);
extern void hook_void_gcc_optionsp (struct gcc_options *);
extern void hook_void_tree (tree);
extern void hook_void_tree_treeptr (tree, tree *);
extern void hook_void_int_int (int, int);
extern void hook_void_gcc_optionsp (struct gcc_options *);