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Nios II IDE Linker "Unable to reach ..."

Altera_Forum
Honored Contributor II
‎04-17-2010 02:58 PM
2,428 Views

Hi, 

I'm using Nios II IDE 8.1. This particular Project is based on the uC-OS simple socket server. I'm not new to using the IDE I've got some pretty cool embedded code running on a Custom CPU board (1Mbyte SSRam) with a Cyclone III. 

 

I added a variable to the main program (iniche_init.c) and then declared it "extern unsigned char mslType" in the enet_server.c file because it's getting updated via enet task. I have other variables declared as "extern" and have had no problem until now. 

 

I did read that I'm out of the 64K and I need to use the -G option (in 6. Developing Programs Using the Hardware Abstraction Layer). But cleaned and tried that and still have the error below. So, reading more I see that I need to change the Board Support Package to match ? I've just used the defaults "altera_components" which I don't want to mess up because I have other projects that are working with that. 

 

i'd sure like to understand this better and know what to do with a little better 'guidance' than going back and forth reading and trying things. 

 

could someone please educate me to save me a little time or "narrow down the reading"  

 

thanks !! 

 

 

Linking April15_EnetTgtGen_CPU.elf... 

obj/enet_server.o(.text+0x664): In function `sss_handle_receive': 

../enet_server.c:643: undefined reference to `mslType' 

obj/enet_server.o(.text+0x664):../enet_server.c:643: Unable to reach mslType (at 0x00000000) from the global pointer (at 0x0123ff30) because the offset (-19136304) is out of the allowed range, -32678 to 32767. 

 

collect2: ld returned 1 exit status 

make: *** [April15_EnetTgtGen_CPU.elf] Error 1 

Build completed in 50.937 seconds 

--- Quote End ---  

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Altera_Forum
Honored Contributor II
‎04-17-2010 05:50 PM
1,410 Views

Is mslType really located at 0x0 or are you just seeing some sort of uninitialized (NULL) pointer issue? 

 

Cheers, 

 

-Ura
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Altera_Forum
Honored Contributor II
‎04-18-2010 05:31 AM
1,410 Views

Where is mslType actually declared? 

 

Jake
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Altera_Forum
Honored Contributor II
‎04-18-2010 01:41 PM
1,410 Views

you haven't declared the variable anywhere. 

one object file (.c file) needs to drop the 'extern' label.
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Altera_Forum
Honored Contributor II
‎04-18-2010 09:19 PM
1,410 Views

O.K. - solved. I had them both "extern" (it's been a long week) but still the issue of changing the BSP is something that interest me to learn about for other project. However, I guess there now Eclipse is the new environment and I need to eventually migrate to that.

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