[U-Boot] [PATCH] Enable expression support for CONFIG_BOARD_SIZE_LIMIT

[Fabio Estevam]

Hi Wolfgang,

On Wed, Dec 5, 2018 at 7:52 AM Wolfgang Denk <wd at denx.de> wrote:

> Please try it on the shell:
>
> -> echo $(( ((768 - 69) * 1024) ))
> 715776
> -> echo $(( (1 * 1024) ))
> 1024

This works fine.

> It does for me, if I set the limit low:
>
>   OBJCOPY spl/u-boot-spl-nodtb.bin
>   COPY    spl/u-boot-spl.bin
>   CFGS    spl/u-boot-spl.cfgout
>   MKIMAGE SPL
>   OBJCOPY u-boot.srec
>   OBJCOPY u-boot-nodtb.bin
> u-boot-nodtb.bin exceeds file size limit:
>   limit:  1024 bytes
>   actual: 480172 bytes
>   excess: 479148 bytes
> make: *** [Makefile:1071: u-boot-nodtb.bin] Error 1

Previously I tested on a machine running Ubuntu 16.04 and today I also
tested on another machine running Ubuntu 18.04.

The results are the same on both machines:

1.  I get a "expecting primary" warning:

 OBJCOPY u-boot-nodtb.bin
/bin/sh: 1: arithmetic expression: expecting primary: ""(1 * 1024)""
  SYM     u-boot.sym
  COPY    u-boot.bin
  MKIMAGE u-boot.img
  LD      spl/drivers/usb/host/built-in.o
  LD      spl/drivers/built-in.o
  LD      spl/u-boot-spl
  OBJCOPY spl/u-boot-spl-nodtb.bin
  COPY    spl/u-boot-spl.bin
  CFGS    spl/u-boot-spl.cfgout
  MKIMAGE SPL

2. The overlap is not detected anymore. In the example below I forced
#define CONFIG_BOARD_SIZE_LIMIT                (1 * 1024)