Re: [avr-chat] linker builds file too big, is it a bug?

[Michael Hennebry]

On Fri, 11 Feb 2011, Massimiliano Cialdi wrote:

> I have a c file:
>
> #include <stdint.h>
>
> static uint8_t data[] =
> {
>         [0 ... 9] = 1,
>         [10 ... 99] = 2,
>         [100 ... 999] = 3,
>         [1000 ... 1499] = 4
> };
>
> int main (void)
> {
>         while(1)
>         {
>                 __asm__ __volatile__ ("nop"); // do nothing
>         }
>         return (0);
> }


> .text is about 160 bytes, and .data is 1500 bytes.
> here is the output of avr-size:
>
> Program:    1662 bytes (5.1% Full)
> (.text + .data + .bootloader)
>
> Data:       1500 bytes (73.2% Full)
> (.data + .bss + .noinit)
>
> I know that .data is to be considered belonging to sram, but its initial
> image is hold in flash, and according to my opinion this fact must be
> take into account, otherwise the binary may not work (as happened to my
> real project)

Does avr-gcc use the copy-from-flash method for your array?
If it does something more intelligent,
your program really would fit.
I note that the program size purports to include .data .

--
"Pessimist: The glass is half empty.
Optimist:   The glass is half full.
Engineer:   The glass is twice as big as it needs to be."