linux下编程用 编译软件

				/* Further -Wswitch tests.  */				/* { dg-do compile } */				/* { dg-options "-Wswitch" } */								enum e { e1 = 0, e2 = 1, e3 = 1, e4 = 2 };								int				foo (enum e ei, int j)				{				  switch (ei)				    {				    case e1: return 1;				    case e3: return 2;				    case e4: return 3;				    }	/* No warning here since e2 has the same value as e3.  */				  switch (ei) /* { dg-warning "enumeration value 'e4' not handled in switch" "enum e4" } */				    {				    case e1: return 1;				    case e2: return 2;				    }				  switch ((int) ei)				    {				    case e1: return 1;				    }	/* No warning here since switch condition was cast to int.  */				  switch ((enum e) j) /* { dg-warning "enumeration value 'e1' not handled in switch" "enum e1" } */				    {				    case e2: return 1;				    case e4: return 2;				    }				  return 0;				}