#define __bitwise __attribute__((bitwise)) typedef unsigned int __bitwise t; unsigned int fun(void); static t (*ptr)(void) = fun; /* * check-name: bitwise-function-pointer * * check-error-start bitwise-function-pointer.c:7:25: warning: incorrect type in initializer (different base types) bitwise-function-pointer.c:7:25: expected restricted t ( *static [toplevel] ptr )( ... ) bitwise-function-pointer.c:7:25: got unsigned int ( * )( ... ) * check-error-end */