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Linker issue while building a large code base

Shrinivas Deshpande
Prodigy 60 points


Hi,

For one of our project we are building our code base for c6x linux using uclinux compiler.

Basically our compiling code has 3 major modules. If we compiling each modules independently, we are not observing any issues.

But when we do combine compilation, we see some linker issues.

/home/test/my-linux-c6x/gcc-c6x/c6x-4.5/bin/../lib/gcc/c6x-uclinux/4.5.1/crtbegin.o:(.fini+0x0): relocation truncated to fit: R_C6000_PCR_S21 against `.text'
/home/test/my-linux-c6x/gcc-c6x/c6x-4.5/bin/../lib/gcc/c6x-uclinux/4.5.1/crtend.o:(.init+0x0): relocation truncated to fit: R_C6000_PCR_S21 against `.text'

Has any one encountered such issues while using uclinux?

Solutions are badly needed.

Regards,

Shrinivas

  • 0
    Prodigy 30 points

    Hi.

    I am running into the exactly same problem. By removing code I am as you able to get rid of the linker errors. 

    From the wiki:

    Q: When cross-compiling, it gets the error message of "Relocation Truncated to Fit"
    A: The issue is due to R_C6000_PCR_S21 relocation uses 21 bit PC-relative branches.
    Thus, problem may occur when .text is greater than 2MB. You may want to try
    adding -mlong-calls flag to see if it helps. If it does not help, try to reorder the objects.
    The linker map file (-WI, --print-map) can help and show where things end up and
    might help pointing to any issues.

    Adding the -mlong-calls however provokes another compiler error ("error: insn does not satisfy its constraints") for me so I am not able to link with this option. Maybe it works for you.

    Any luck solving this?

    Regards

    Anders