[LLVMdev] Running cross compiled binaries for ARM on gem5

Renato Golin renato.golin at linaro.org
Mon Mar 18 02:28:18 PDT 2013

On 17 March 2013 22:40, SArora <silkyar at umich.edu> wrote:

> However, this errors out saying
> /home/silky/VecProject/opencv/OpenCVInstall/arm/include/opencv2/core/mat.hpp:117:9:
> error: cannot compile this atomic library call yet
>         CV_XADD(refcount, 1);
>         ^~~~~~~~~~~~~~~~~~~~
> /home/silky/VecProject/opencv/OpenCVInstall/arm/include/opencv2/core/operations.hpp:61:38:
> note: expanded from macro 'CV_XADD'
>         #define CV_XADD(addr, delta)
> __c11_atomic_fetch_add((_Atomic(int)*)(addr), (delta), __ATOMIC_SEQ_CST)

This is odd. This atomic is implemented in CGAtomic.cpp, but it's being
lowered as a library call because "UseLibcall" is true:

bool UseLibcall = (Size != Align ||
                     getContext().toBits(sizeChars) > MaxInlineWidthInBits);

I don't think it should in your case. That looks like a bug, but I'm not an
atomic library expert. Can you create a bug in bugzilla (
http://www.llvm.org/bugs/), please?

Possibly, you should send an email with this error and the bugzilla ID to
the list, just to make sure you get the attention of the right people.

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