1  int
       2  _vfprintf_r (double fp)
       3  {
       4    if (__builtin_signbit (fp))
       5      return '-';
       6  }
       1  int
       2  _vfprintf_r (double fp)
       3  {
       4    if (__builtin_signbit (fp))
       5      return '-';
       6  }