Re: [Fwd: RE: [Fwd: RE: [avr-chat] BOOTLOADER on ATMega644]]

[Blake Leverett]

On Monday 22 December 2008, Bob Paddock wrote:
> Do Zero Length Arrays work in AVR GCC?
> I have never seen them used nor documented as such,
> but have never tried to use them.

I have used them recently, for a situation where we needed to have different 
variables used for different builds.  For example:

#define BIG 1


char data_array[1000*BIG]; // Zero if BIG==0

void somefunc(void)
{
        if (BIG)
        {
                data_array[0] = 1;
        }
}

This way, the program will compile if BIG == 0, but no space for the array is 
allocated, and the if() statement inside somefunc will be optimized out.

I did it this way to prevent a lot of #if BIG statements, since I find that 
code with a lot of #if's to be confusing.

Does anybody see a problem with doing this?

Blake