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Altera_Forum's avatar
Altera_Forum
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16 years ago

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

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

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4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

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

    Cheers,

    -Ura
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    you haven't declared the variable anywhere.

    one object file (.c file) needs to drop the 'extern' label.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    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.