[Llvm-bgq-discuss] Regression when linking with -fopenmp

[Schlottke-Lakemper, Michael]

Hi folks,

There seems to be a regression in bgclang during the linking step after compiling with -fopenmp. With the current nightly build, we get the following errors:

####################
....
Linking CXX executable zfs
CMakeFiles/zfs.dir/zfsdgblock_inst_3d_linearscalaradv.cpp.o:(.opd+0xc18): multiple definition of `.omp_reduction_op.'
CMakeFiles/zfs.dir/zfsdgblock_inst_2d_linearscalaradv.cpp.o:(.opd+0xc18): first defined here
CMakeFiles/zfs.dir/zfsdgblock_inst_3d_linearscalaradv.cpp.o:(.opd+0xe28): multiple definition of `.omp_reduction_op..377'
CMakeFiles/zfs.dir/zfsdgblock_inst_2d_linearscalaradv.cpp.o:(.opd+0xe28): first defined here
CMakeFiles/zfs.dir/zfsdgblock_inst_2d_acousticperturb.cpp.o:(.opd+0xc48): multiple definition of `.omp_reduction_op.'
CMakeFiles/zfs.dir/zfsdgblock_inst_2d_linearscalaradv.cpp.o:(.opd+0xc18): first defined here
CMakeFiles/zfs.dir/zfsdgblock_inst_2d_acousticperturb.cpp.o:(.opd+0xe58): multiple definition of `.omp_reduction_op..377'
CMakeFiles/zfs.dir/zfsdgblock_inst_2d_linearscalaradv.cpp.o:(.opd+0xe28): first defined here
CMakeFiles/zfs.dir/zfsdgblock_inst_3d_acousticperturb.cpp.o:(.opd+0xc48): multiple definition of `.omp_reduction_op.'
CMakeFiles/zfs.dir/zfsdgblock_inst_2d_linearscalaradv.cpp.o:(.opd+0xc18): first defined here
CMakeFiles/zfs.dir/zfsdgblock_inst_3d_acousticperturb.cpp.o:(.opd+0xe70): multiple definition of `.omp_reduction_op..377'
CMakeFiles/zfs.dir/zfsdgblock_inst_2d_linearscalaradv.cpp.o:(.opd+0xe28): first defined here
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [src/zfs] Error 1
make[1]: *** [src/CMakeFiles/zfs.dir/all] Error 2
make: *** [all] Error 2
####################

This occurs with r246622-2015090. Trying a previous version of bgclang (r236977-20150511) works fine.

Does anyone here have the same problem or knows a workaround?

Regards,

Michael
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