[Openmp-dev] Offloading build fails

[Itaru Kitayama via Openmp-dev]

Can you submit a patch to upstream? In the meantime, I workaround by using
libc++.

On Mon, Nov 4, 2019 at 8:17 PM Jon Chesterfield via Openmp-dev <
openmp-dev at lists.llvm.org> wrote:

> I am not sure what's going on with the trunk clang at this moment.
>>
>> $ cat a.cpp
>> #include <iostream>
>> int main() {
>> }
>>
>> $ clang++ -std=c++11 -fopenmp -nu/7.2.0/../../../../inclu
>> de/c++/7.2.0/bits/std_abs.h:70:3:
>> error: declaration conflicts with target of using declaration already in
>> scope
>>   abs(double __x)
>>   ^
>> /p/scratch/cpcp0/pcp0151/opt/clang/201911040249/lib/clang/10
>> .0.0/include/__clang_cuda_math_forward_declares.h:50:25:
>> note: target of using declaration
>> __DEVICE__ const double abs(const double);
>
>
> I think this is bug https://bugs.llvm.org/show_bug.cgi?id=42972. The fix
> may be adding some #ifdef logic to the cuda header, I've worked around it
> locally by reverting D62046
>
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