用于进行gcc测试

				/* Test for prototype followed by old-style definition, as in				   dremf-type-compat-2.c but with a non-built-in function.  */				/* { dg-do compile } */				/* { dg-options "-pedantic" } */								float f (float, float); /* { dg-warning "prototype declaration" } */								float				f (x, y)				     float x;				     float y;				{ /* { dg-warning "promoted argument '.' doesn't match prototype" } */				  return x + y;				}