/* The bit-field below would have a problem if __INT_MAX__ is too small. */ #if __INT_MAX__ < 2147483647 int main (void) { exit (0); } #else struct foo { unsigned b31 : 1; unsigned b30 : 1; unsigned b29 : 1; unsigned b28 : 1; unsigned rest : 28; }; foo(a) struct foo a; { return a.b30; } #endif