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


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--- Comment #15 from Ilija Kocho <ilijak@siva.com.mk> 2011-01-29 19:48:52 GMT ---
(In reply to comment #13)
> Hi
> So far it is about the below,
> >   - Concatenation or plain strings?
> 
> I prefer the plain strings.

If we do not keep the other macros that depend on CYGDAT_LWIP_MEM_SECTION_NAME
then I'll be happy with plain strings. If we keep them then the concatenation
is a convenience.

Note: (my error in last CDL proposal) If we keep the macros,
CYGDAT_LWIP_MEM_SECTION_NAME can't have no_define flag.

> > IMO it would depend on resolution for section related macros proposed in
> > http://bugs.ecos.sourceware.org/attachment.cgi?id=1088 to Bug 1001114 . 
> > 
> > For reference, here is a digest of all code snippets as are in my current
> > build:
> 
> > -----------------
> > cdl_package CYGPKG_NET_LWIP {
> >       ...
> >         cdl_option CYGDAT_LWIP_MEM_SECTION {
> >             display "Special memory section for lwIP buffers."
> >             active_if CYGDAT_LWIP_MEM_SECTION_NAME
> >             requires CYGDAT_LWIP_MEM_SECTION_NAME
> >             flavor data
> >             calculated { "\"." . CYGDAT_LWIP_MEM_SECTION_NAME . "\"" }
> >             description "..."
> >         }
> >       ...
> > }
> 
> I dislike the above as the most users will be to see in CT a strange grayed
> data box like below:
> 
> - |__) Momory options
>        [ab] "Special memory section for lwIP buffers."    | ".0"
> 
> What's that ".0"? That's concatenation with an absent data.

Thanks for remarks, you're right, this is ugly and looks awkward.
A way to improve:

  calculated { CYGDAT_LWIP_MEM_SECTION_NAME ? 
             "\"." . CYGDAT_LWIP_MEM_SECTION_NAME . "\"" : "none" }

or equivalent with plain strings:

  calculated { CYGDAT_LWIP_MEM_SECTION_NAME ? 
             CYGDAT_LWIP_MEM_SECTION_NAME : "none" }

Note: Even if we end up with plain strings I would rather keep
CYGDAT_LWIP_MEM_SECTION data than bool. IMO "none" is rather descriptive.

Comments?

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