[ECOS] customizing redboot build

[ECOS] customizing redboot build

[Jacob Avraham]

Hi,

I want to add a string to the redboot version string (or for that matter to my own string), that get changed every time I run make. In other systems I did it with a parameter that I passed to make, like "make MY_VAR=my_value some_target".
But in redboot all the Makefiles are auto-generated.
How do I get around to do that?

Thanks,

Jacob






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RE: [ECOS] customizing redboot build

[Chris Zimman]

> I want to add a string to the redboot version string (or for that
> matter to my own string), that get changed every time I run make. In
> other systems I did it with a parameter that I passed to make, like
> "make MY_VAR=my_value some_target".
> But in redboot all the Makefiles are auto-generated.
> How do I get around to do that?

See:

packages/redboot/[version]/src/version.c

and

the function do_version() in packages/redboot/[version]/src/main.c

You can easily add whatever you want here statically or at compile time.

eg.
    [...]

    diag_printf("Copyright (C) 2000, 2001, 2002, 2003, 2004 Red Hat,
Inc.\n");
    diag_printf("Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 eCosCentric
Limited\n\n");
    diag_printf("RAM: %p-%p, ", (void*)ram_start, (void*)ram_end);
    diag_printf("[%p-%p]", mem_segments[0].start, mem_segments[0].end);
    diag_printf(" available\n");

    [...]

    diag_printf(MY_ADDTIONAL_CRUFT);

    [...]

gcc [...] -DMY_ADDITIONAL_CRUFT=\""Whatever extra info you wanted\"" main.c

There are a multitude of ways to do this.  You could do it in the CDL files,
etc. -- the choice is left as an exercise for the reader.

--Chris

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RE: [ECOS] customizing redboot build

[Jacob Avraham]

>
> > I want to add a string to the redboot version string (or for that
> > matter to my own string), that get changed every time I run make. In
> > other systems I did it with a parameter that I passed to make, like
> > "make MY_VAR=my_value some_target".
> > But in redboot all the Makefiles are auto-generated.
> > How do I get around to do that?
>
> See:
>
> packages/redboot/[version]/src/version.c
>
> and
>
> the function do_version() in packages/redboot/[version]/src/main.c
>
> You can easily add whatever you want here statically or at compile
> time.
>
> eg.
>     [...]
>
>     diag_printf("Copyright (C) 2000, 2001, 2002, 2003, 2004 Red Hat,
> Inc.\n");
>     diag_printf("Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
> eCosCentric
> Limited\n\n");
>     diag_printf("RAM: %p-%p, ", (void*)ram_start, (void*)ram_end);
>     diag_printf("[%p-%p]", mem_segments[0].start, mem_segments[0].end);
>     diag_printf(" available\n");
>
>     [...]
>
>     diag_printf(MY_ADDTIONAL_CRUFT);
>
>     [...]
>
> gcc [...] -DMY_ADDITIONAL_CRUFT=\""Whatever extra info you wanted\""
> main.c
>
> There are a multitude of ways to do this.  You could do it in the CDL
> files,
> etc. -- the choice is left as an exercise for the reader.
>
> --Chris
>
I am familiar with the files above. The question is how to I pass the -DMY_ADDITIONAL_CRUFT stuff
from my own build script (part of a larger system build) to the gcc command that compiles these files,
as it is called from Ecos automatically-generated makefiles.

-Jacob





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RE: [ECOS] customizing redboot build

[Chris Zimman]

> I am familiar with the files above. The question is how to I pass the -
> DMY_ADDITIONAL_CRUFT stuff
> from my own build script (part of a larger system build) to the gcc
> command that compiles these files,
> as it is called from Ecos automatically-generated makefiles.

You are going to either have to modify the CDL files or the Makefiles
themselves.  I would recommend the CDL files as that way your changes will be
preserved in any subsequent target trees you produce.

The CDL file you probably want is:

packages/redboot/[version]/cdl/redboot.cdl

If you're not familiar with CDL files and their use, the eCos documentation
is your next stop.

--Chris

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