On Tue, Nov 07, 2017 at 08:11:17AM +0100, Ladislav Michl wrote:
> On Mon, Nov 06, 2017 at 07:58:58PM +0100, Ladislav Michl wrote:
> > Hi there,
> > 
> > I just added new platform (at91) to my BSP and configured at91bootstrap
> > v3.8.9.
> > 
> > Problem is that PTXDist-2017.10 produces way too large binary:
> > 2099622 at91sam9260ek-dataflashboot-barebox-3.8.9.bin
> > while correct size is:
> >    2470 at91sam9260ek-dataflashboot-barebox-3.8.9.bin
> > 
> > Problem turned out to be ld-wrapper script or something it calls.
> > Just replacing ld-wrapper in ptxdist-2017.10.0/scripts/wrapper to point
> > directly to arm-v5te-linux-gnueabi-ld is enough to solve problem.
> > Does anyone clue where to look? Call path is:
> > sysroot-host/lib/wrapper in $PATH where
> > arm-v5te-linux-gnueabi-ld -> ptxdist-2017.10.0/scripts/wrapper/ld-wrapper
> 
> So, ld-wrapper is adding:
> --- at91sam9260ek-dataflashboot-barebox-3.8.9.map     2017-11-07 
> 07:50:28.819011233 +0100
> +++ at91sam9260ek-dataflashboot-barebox-3.8.9.map     2017-11-07 
> 07:47:48.605530524 +0100
> @@ -155,6 +155,11 @@
>  
>                  0x0000000000000000                . = ALIGN (0x4)
>  
> +.note.gnu.build-id
> +                0x0000000000000000       0x24
> + .note.gnu.build-id
> +                0x0000000000000000       0x24 linker stubs
> +
>  .text           0x0000000000200000      0x1a0
>                  0x0000000000200000                _stext = .
>   *(.text)
> 
> Modifying at91bootstrap's Makefile to do --remove-section=.note.gnu.build-id
> fixes it.
> 
> Are there other options to fix this?

Well, I'll fix upstream the same way kernel handles this.
Kernel is always right: https://lkml.org/lkml/2011/12/15/162
Another option is to use u-boot way, ie. nicely align a embed
this section into binary, but as every byte matters here, lets
not do this.

        ladis

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