gcc-you can use this code to learn something about gcc, and inquire further into linux,

				// Test that completing an array declared with a typedef doesn't change				// the typedef.								// { dg-do run }								typedef int iArr[];								const iArr array4={				  1, 2, 3, 4				};								const iArr array3={				  1, 2, 3				};								const iArr array5={				  1, 2, 3, 4, 5				};								int main()				{				  if (sizeof (array4)/sizeof (array4[0]) != 4				      || sizeof (array3)/sizeof (array3[0]) != 3				      || sizeof (array5)/sizeof (array5[0]) != 5)				    return 1;				}