Build failures when link MFMG/no CUDA against DealII/CUDA

ORNL-CEES / mfmg

MFMG is an open-source library implementing matrix-free multigrid methods.

https://mfmg.readthedocs.io

BSD 3-Clause "New" or "Revised" License

13 stars 8 forks source link

Build failures when link MFMG/no CUDA against DealII/CUDA #65

Open aprokop opened 6 years ago

aprokop commented 6 years ago

<snip>
/usr/local/cuda-8.0/lib64/libcusolver.so: undefined reference to `GOMP_parallel_start'
/usr/local/cuda-8.0/lib64/libcusolver.so: undefined reference to `GOMP_critical_end'
<snip>

-fopenmp flag is present in the link, and is after cusolver. DealII was installed through spack. This does not happen when DealII is installed independently.

Enabling CUDA in MFMG leads to successful linking.

Rombur commented 6 years ago

Yeah there is a bug with the current development version of dealii where -fopenmp is not passed correctly when cusolver is used https://cdash.kyomu.43-1.org/testDetails.php?test=8527129&build=1390 I am hoping to fix it this week end.

masterleinad commented 5 years ago

I am seeing similar issues if deal.II is built with CUDA support, but mfmg isn't.