OpenMP error when building with NVC++

[iholod1]

When trying to build with nvc++ I got several errors of the following type:
NVC++-S-0155-A possibly throwing copy constructor for a task firstprivate variable is not supported (STRUMPACK/src/BLR/BLRMatrixMPI.cpp: 2640)
I am using nvc++ 23.11-0.

[pghysels]

I pushed some fixes, see here: 3462e8c

However, I still see some errors, see below.
Can you try to compile without OpenMP, or with GCC?

NVC++-S-0000-Internal compiler error. flowgraph: node is zero      27  (/global/homes/p/pghysels/perlmutter/STRUMPACK/src/BLR/BLRMatrixMPI.cpp: 2647)
NVC++-F-0000-Internal compiler error. Invalid key for hash       0  (/global/homes/p/pghysels/perlmutter/STRUMPACK/src/BLR/BLRMatrixMPI.cpp: 2647)
NVC++/x86-64 Linux 23.9-0: compilation aborted

NVC++-S-0000-Internal compiler error. reinline:bad ILM link  111827  (/global/homes/p/pghysels/perlmutter/STRUMPACK/src/BLR/BLRMatrixMPI.cpp: 2764)
NVC++/x86-64 Linux 23.9-0: compilation completed with severe errors

NVC++-S-0000-Internal compiler error. flowgraph: node is zero      27  (/global/homes/p/pghysels/perlmutter/STRUMPACK/src/BLR/BLRMatrixMPI.cpp: 2751)
NVC++-F-0000-Internal compiler error. Invalid key for hash       0  (/global/homes/p/pghysels/perlmutter/STRUMPACK/src/BLR/BLRMatrixMPI.cpp: 2751)
NVC++/x86-64 Linux 23.9-0: compilation aborted

[iholod1]

I've also got internal compiler error:
[ 84%] Building CXX object CMakeFiles/strumpack.dir/src/iterative/GMResMPI.cpp.o NVC++-S-0000-Internal compiler error. reinline:bad ILM link 101580 (/u/ihol/lib/STRUMPACK/src/BLR/BLRMatrixMPI.cpp: 2763)

Without OpenMP or with OpenMP+GCC compilation works fine.

[iholod1]

The problem seems to arise from the following lines in src/BLR/BLRMatrixMPI.cpp (commenting on them allows compilation to complete)

2762:
#pragma omp task default(shared) firstprivate(m,lm,i)

2638:
#pragma omp task default(shared) firstprivate(m,lm)

2664:
#pragma omp task default(shared) firstprivate(m,lm)

2742:
#pragma omp task default(shared) firstprivate(m,lm,i,j)