[Openmp-dev] Math symbols are not found during configuration

[Itaru Kitayama via Openmp-dev]

I will try that. Can I assume this is just a temporary fix?

On Thu, Jul 25, 2019 at 22:05 Doerfert, Johannes <jdoerfert at anl.gov> wrote:

> Thanks for the reproducer, that helped a lot.
>
> So the problem is the host code but during device compilation.
> I was earlier confused as host compilation should not be impacted by this
> and it is not.
>
> I do not have a good workaround other than defining NAN, and other macros
> such as M_PI,
> manually in NVPTX mode. In my system that would look like:
>
> #ifdef __NVPTX__
>   #define NAN (0.0f / 0.0f)
>
> #endif
>
> Can you give this a try and tell me if it works for you?
>
>
> ________________________________________
> From: Itaru Kitayama <itaru.kitayama at gmail.com>
> Sent: Thursday, July 25, 2019 07:34
> To: Doerfert, Johannes
> Cc: openmp-dev at lists.llvm.org
> Subject: Re: [Openmp-dev] Math symbols are not found during configuration
>
> #include <cmath>
> #include <iostream>
>
> int main()
> {
>         std::cout << NAN << std::endl;
> };
>
> This gives you a build error when compiled with -fopenmp-targets=nvptx64,
> but not without it.
>
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