c - Are empty arrays no longer allowed by gcc?

Question

I have gcc 4.7.2-3 and I get this following error:

main.c:5:6: error: array size missing in ‘fname’

main.c:6:6: error: array size missing in ‘lname’

when initializing this:

int fname[];
int lname[];

Is this no longer possible using higher versions of gcc? Because I am certain I have used this before...

EDIT: The reason I say I remember this, is because I even see it here: http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/V40F_HTML/AQTLTBTE/DOCU_046.HTM

Answer 1

You can only declare an array with no size if you are initializing it right away

int myarr[] = {1, 2, 3};

or if it is the last member in a structure

struct foo {
  int something;
  int somethingelse;
  char emptyarr[];
};