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<p style="margin-top:0;margin-bottom:0">Hello,<br>
<br>
in addition to my previous mail:<br>
I saw in this year's October archive, that Gabriele Jost has been running into similar issue. Do you know if and how it has been resolved for him?<br>
<br>
Further, I tried out the clang-ykt git repo, and compiled in the same fashion as I did with v5, which worked fine for some small test-cases. This is why I am still quite surprised I ran into the mentioned compile issue with v5. That said, I assume you merged
the clang-ykt branch into the v5 branch?<br>
The problem with the clang-ykt branch for me however is, that I run into some mysterious linking errors when compiling our major framework.
<br>
<br>
Would you be able to kindly shed some light on this issue?<br>
Thanks and kind regards,<br>
Jan<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Eichstaedt, Jan R<br>
<b>Sent:</b> 14 December 2017 11:39:00<br>
<b>To:</b> Gheorghe-Teod Bercea<br>
<b>Cc:</b> via Openmp-dev<br>
<b>Subject:</b> Re: [Openmp-dev] offloading to Nvidia GPUs</font>
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<p style="margin-top:0; margin-bottom:0">Hello, <br>
<br>
both your suggestions of adding the compile flags<br>
<font size="2" face="sans-serif"> -Xopenmp-target=nvptx64-nvidia-cuda -march=sm_35</font></p>
<p style="margin-top:0; margin-bottom:0"><font size="2" face="sans-serif"></font>
<font size="2">-Xopenmp-target -march=sm_35</font></p>
<p style="margin-top:0; margin-bottom:0"><font size="2">still give me exactly the same error message.<br>
<br>
Do you have any other suggestions?<br>
<br>
Cheers,<br>
Jan</font><br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Gheorghe-Teod Bercea <Gheorghe-Teod.Bercea@ibm.com><br>
<b>Sent:</b> 13 December 2017 18:30:00<br>
<b>To:</b> Eichstaedt, Jan R<br>
<b>Cc:</b> via Openmp-dev<br>
<b>Subject:</b> Re: [Openmp-dev] offloading to Nvidia GPUs</font>
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<div><font size="2" face="sans-serif">Hi,</font><br>
<br>
<font size="2" face="sans-serif">Yes there is:</font><br>
<br>
<font size="2" face="sans-serif">-Xopenmp-target=nvptx64-nvidia-cuda -march=sm_35</font><br>
<br>
<font size="2" face="sans-serif">You may also run into the problem that target offloading is not yet fully supported.</font><br>
<br>
<font size="2" face="sans-serif">Hope this helps!</font><br>
<br>
<font size="2" face="sans-serif">Thanks,</font><br>
<br>
<font size="2" face="sans-serif">--Doru</font><br>
<br>
<br>
<br>
<br>
<br>
<font size="1" color="#5f5f5f" face="sans-serif">From: </font><font size="1" face="sans-serif">"Eichstaedt, Jan R via Openmp-dev" <openmp-dev@lists.llvm.org></font><br>
<font size="1" color="#5f5f5f" face="sans-serif">To: </font><font size="1" face="sans-serif">via Openmp-dev <openmp-dev@lists.llvm.org></font><br>
<font size="1" color="#5f5f5f" face="sans-serif">Date: </font><font size="1" face="sans-serif">12/13/2017 01:11 PM</font><br>
<font size="1" color="#5f5f5f" face="sans-serif">Subject: </font><font size="1" face="sans-serif">[Openmp-dev] offloading to Nvidia GPUs</font><br>
<font size="1" color="#5f5f5f" face="sans-serif">Sent by: </font><font size="1" face="sans-serif">"Openmp-dev" <openmp-dev-bounces@lists.llvm.org></font><br>
<hr noshade="">
<br>
<br>
<br>
<font size="3" face="Helvetica">Hello,</font><br>
<font size="3" face="Helvetica"><br>
I am using llvm and clang version 5.0.0 together with the openmp project of that version on Ubuntu 16.04.
<br>
I try to compile a simple program involving a <i>#pragma omp target teams distribute parallel for
</i>statement to offload to a Nvidia-GPU using the following flags:<br>
-fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda --cuda-path=/usr/local/cuda/ --cuda-gpu-arch=sm_35<br>
</font><br>
<font size="3" face="Helvetica">However, the compilation fails, with the following being the first assertion that is triggered:<br>
clang++: [...]/llvm-5.0.0.src/tools/clang/lib/Driver/ToolChains/Cuda.cpp:346: virtual void clang::driver::toolchains::CudaToolChain::addClangTargetOptions(const llvm::opt::ArgList&, llvm::opt::ArgStringList&, clang::driver::Action::OffloadKind) const: Assertion
`!GpuArch.empty() && "Must have an explicit GPU arch."' failed.<br>
<br>
Is there a way to pass the GPU architecture differently? Or is target offloading not fully supported in v5.0.0 yet and I might better use the clang-ykt project? Or have I overlooked something else completely?<br>
<br>
Thanks for any help you can offer.<br>
<br>
Cheers,<br>
Jan</font><br>
<br>
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