Re: [avr-gcc-list] Data in .noinit isn't seen by linker

[Andrew M. Cullen]

I will try the extern declarations and report back but I can tell you now 
that the following creates no errors

struct my_dsl_s my_dsl __attribute__ ((section(".foobar")));

This is why I was wondering if I needed to add section information to the 
linker command file for "noinit".

Andrew


----- Original Message ----- 
From: "Erik Christiansen" <address@hidden>
To: "Andrew M. Cullen" <address@hidden>
Cc: <address@hidden>
Sent: Wednesday, October 26, 2005 9:26 PM
Subject: Re: [avr-gcc-list] Data in .noinit isn't seen by linker


> On Wed, Oct 26, 2005 at 08:13:33PM -0400, Andrew M. Cullen wrote:
> >    I'm trying to put a structure into the ".noinit" space and I'm getting 
> > a
> > complaint from the linker. Here is my ".h" definition.
>
> > struct my_dsl_s my_dsl __attribute__ ((section(".noinit")));
>
> Have you tried:
>
> In one file:
> struct my_dsl_s my_dsl __attribute__ ((section(".noinit")));
>
> In all others:
> extern struct my_dsl_s my_dsl __attribute__ ((section(".noinit")));
>
> This works for me with the gnu toolchain in this situation, though
> currently on another target, I'll admit. (And I'm not doing
> -funit-at-a-time)
>
> > Do I need to inform the linker about this section? (noinit). From the
> > avr-libc docs it seems that this section is predefined but based on the
> > compiler output it seems it doesn't know what to do with this section.
>
> Nope. If ld didn't know about .noinit, you'd see an error like:
>
> error: no memory region specified for loadable section `.noinit'
>
> (Try using __attribute__ ((section (".chook"))) , for example. ;)
>
> hth,
> Erik
>
> --
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