ffs-1.c

来自「this is a gcc file, you can download it 」· C语言 代码 · 共 13 行

__volatile int a = 0;

extern void abort (void);
extern void exit (int);

int
main (void)
{
  if (__builtin_ffs (a) != 0)
    abort ();
  exit (0);
}