Re: [9fans] zero length arrays in gcc

[Bakul Shah <bakul+plan9@bitblocks.com>]

On Wed, 23 Sep 2009 02:49:44 +0800 Fernan Bolando <fernanbolando@mailc.net>  wrote:
> Hi all
>
> nhc98 uses a few of
>
> static unsigned startLabel[]={};
>
> which is a zero length array. It appears that it uses this as
> reference to calculate the correct pointer for a bytecode.
>
> pcc does not allow this since zero lenth array is another gcc
> extension. I tried declaring it as
>
> static unsigned startLabel[];
>
> The resulting bytecode can then be compiled however it will only
> crash. I traced it a pointer that tries to read an unallocated section
> in memory.
>
> Is it possible emulate zero pointer in pcc??

Would something like this work?

unsigned foo[1];
#define startLabel (&foo[1])