Help! Problem in linking!

hi Dugufei,

did you try -G0 ?

i had this problem with redboot... fixed with this option. found somewhere here in this forum. maybe it works for you, too.

regards, martin

Yes, I've tried from -G0 to -G4. But it didn't work!

The Altera's document didn't say clearly.

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originally posted by mrwgm@Oct 26 2006, 04:24 AM

hi dugufei,

did you try -g0 ?

i had this problem with redboot... fixed with this option. found somewhere here in this forum. maybe it works for you, too.

regards, martin

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you should double check your code, something should be wrong with your source.

you can try get rid of the variable which lead to fail.

Hi Dugufei,

I sometimes get this error when trying to access data in a different section. I have a section of battery-backed SRAM, away from the RAM used for my code and bss. To put something in the NVR I have to use:

# define COMM_NVR __attribute__((section(".common_nvr")))

// example of putting variable in NVR.

unsigned char fred COMMON_NVR;

When I want to access fred from another file I have to:

extern unsigned char fred COMMON_NVR;

If I forget to add the COMMON_NVR attribute then I get the linker error you describe, &#39;Can&#39;t reach....&#39;.

So maybe your unreachable variable isn&#39;t where you think it is.

Banx.

But I can run seccussfly the same code in ARM7 platform. So, I think the code is all right.

Now I want to port the code into Nios2.

The problem is what is the right -G compiler option&#12290;