[Bug 1001116] Instruct lwIP to use special section for buffers and heap.

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--- Comment #10 from Ilija Kocho <ilijak@siva.com.mk> 2011-01-28 12:26:39 GMT ---
(In reply to comment #9)
> "Make it as simple as you can, and no simpler" :-) But,
> 
> I would not use calculated command as you proposed

Why not use calculated? By using calculated value we have a single entry point
for section name. It can be further enhanced by following:

    cdl_component CYGDAT_LWIP_MEM_SECTION_NAME {
          ...
          legal_values { "ahb_bss" "ahb_0" }
          ...
    }

> 
>     cdl_option CYGDAT_LWIP_MEM_SECTION {
>         display "Special memory section for lwIP buffers"
>         default_value 0
> 
> IMO, you can do it in your CDL (HAL)
> 
>     cdl_option CYGDAT_LWIP_MEM_SECTION_NAME {
>         ...
>         requires { CYGDAT_LWIP_MEM_SECTION == ... }
> 
> Comments?

The combination that you are proposing inherently raises a conflict which I
prefer to avoid.
However I tried it and the conflict resolution offered by configtool is not
what we want - it offers CYGDAT_LWIP_MEM_SECTION_NAME = 0 ??

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