[ECOS] Ecos size

[ECOS] Ecos size

[Huguenin Frédéric]

Hello,

I want to use ecos with 500kbytes of ROM. I just want to use a 150kbytes C
program. But when I compile, the size of my executable is 900kbytes.
I would want to know how can I reduce the size of eCos. What don't I need ?
thanks

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Re: [ECOS] Ecos size

[Markus Schaber]

Hi, Huguenin,

Huguenin Frédéric <Frederic.Huguenin@he-arc.ch> wrote:

> I want to use ecos with 500kbytes of ROM. I just want to use a 150kbytes C
> program. But when I compile, the size of my executable is 900kbytes.
> I would want to know how can I reduce the size of eCos. What don't I need ?

With ecos, ask the question the other way round. Ask what you need, and
drop everything else.

Additionally, some compiler options (e. g. -Os for size optimization)
may help a little.


Regards,
Markus

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Dipl. Inf.     | Software Development GIS

Fight against software patents in Europe! www.ffii.org
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Re: [ECOS] Ecos size

[Jiri Gaisler]

Make sure you measure the executable with the 'size' utility
(e.g. sparc-elf-size app.exe), and not just looking at the
file size. Most of the file size is debugging symbols, which
are not loaded into the prom.

Jiri.

Huguenin Frédéric wrote:
> Hello,
> 
> I want to use ecos with 500kbytes of ROM. I just want to use a 150kbytes C
> program. But when I compile, the size of my executable is 900kbytes.
> I would want to know how can I reduce the size of eCos. What don't I need ?
> thanks
> 

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Re: [ECOS] Ecos size

[Edgar Grimberg]

Huguenin Frédéric wrote:
> Hello,
>
> I want to use ecos with 500kbytes of ROM. I just want to use a 150kbytes C
> program. But when I compile, the size of my executable is 900kbytes.
> I would want to know how can I reduce the size of eCos. What don't I need ?
> thanks
>
>   
Is the size of the .elf that big? If you are building a ROM application, 
you can try to "objcopy -O binary" it to a bin file and see the size of 
that.

Edgar

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[ECOS] Re: Ecos size

[Grant Edwards]

On 2008-04-04, Huguenin Frédéric <Frederic.Huguenin@he-arc.ch> wrote:

> I want to use ecos with 500kbytes of ROM. I just want to use a 150kbytes C
> program. But when I compile, the size of my executable is 900kbytes.
> I would want to know how can I reduce the size of eCos. What don't I need?

Given your list of feature requirements, I would say you don't
need anything.  I can come up with a 0KB configuration that
should meet your requirements.

-- 
Grant Edwards                   grante             Yow! FROZEN ENTREES may
                                  at               be flung by members of
                               visi.com            opposing SWANSON SECTS ...


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[ECOS] Re: Ecos size

[Grant Edwards]

On 2008-04-04, Grant Edwards <grante@visi.com> wrote:

>> I want to use ecos with 500kbytes of ROM. I just want to use a 150kbytes C
>> program. But when I compile, the size of my executable is 900kbytes.
>> I would want to know how can I reduce the size of eCos. What don't I need?
>
> Given your list of feature requirements, I would say you don't
> need anything.  I can come up with a 0KB configuration that
> should meet your requirements.

Perhaps that came across as overly sarcastic.  My point is that
the "C" in eCos stands for "Configurable".  eCos can be
anywhere from a few KB to a few MB.  It depends entirely on
what features you need.

-- 
Grant Edwards                   grante             Yow! I'd like some JUNK
                                  at               FOOD ... and then I want to
                               visi.com            be ALONE --


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