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undefined symbol mspabi_srli

Marcel Grossmann
Prodigy 10 points

I get the following error when compiling. But only at optimization level off and 0. At higher lever run the programm.

__mspabi_srli_4 ./System/Timer.obj
 __mspabi_srli_5 ./System/Timer.obj
 __mspabi_srli_8 ./System/Timer.obj
 __mspabi_srli_9 ./System/Timer.obj

I use compiler V4.4.4

  • 0
    Guru 227245 points
    This missing 'function' is a helper code stub to perform a multi-bit shift operations. It helps keeping code size small at the expense of a function call. (the code calls different entry points into a chain of shift instructions, to perform 9,8,5 or 4 shift operations before returning)
    I don't know why it is not linked.
    On higher optimization levels, the compiler may inline the shifting code (higher speed) or even eliminate some of the shifts by re-arranging instructions. So this code isn't needed.

    BTW: it is a linker error, not a compiler error.

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