Help! Problem in linking!

Altera_Forum · ‎10-26-2006

I met the problem whem linking:

Unable to reach (at 0x0009bf4c) from the global pointer (at 0x000861e0) because the offset (89452) is out of the allowed range, -32678 to 32767.

The code was more than 64KB。 How to solve it?

A document said that the -G compiler option should be fixed. This option sets the

threshold size. But how to make it?

Help me. Thanks!

Altera_Forum · ‎10-26-2006

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

Altera_Forum · ‎10-27-2006

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

The Altera's document didn't say clearly.

--- Quote Start ---

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

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=18925)

--- quote end ---

--- Quote End ---

Altera_Forum · ‎10-27-2006

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.

Altera_Forum · ‎10-27-2006

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, 'Can't reach....'.

So maybe your unreachable variable isn't where you think it is.

Banx.

Altera_Forum · ‎10-30-2006

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。