[Llvm-bgq-discuss] more issues from trying bgclang with GROMACS

[Mark Abraham]

Hi,

I had another go compiling GROMACS 5.0 beta with bgclang latest RPM
(r200401-20140129). CMake detection of OpenMP support in mpiclang failed.
Detection should just work because using the -fopenmp flag is a standard
way to do it. When I tried a manual compile:

$ ~/progs/bgclang/current/bin/bgclang -fopenmp test.c -o test
/homea/slbio/slbio013/progs/bgclang/r200401-20140129/binutils/bin/ld:
cannot find -liomp5
clang: error: linker command failed with exit code 1 (use -v to see
invocation)

That looks like a lingering Intel-ism?

The MPI plus non-OpenMP build seemed to go OK, but a file in our bundled
lapack subset provoked a bug (attached in tarball). That file was not a
problem in ~August 2013.

Thanks again for the effort!

Cheers,

Mark
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.alcf.anl.gov/pipermail/llvm-bgq-discuss/attachments/20140207/ad9b657f/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: gromacs-slarrex-bug-report.tar.gz
Type: application/x-gzip
Size: 60470 bytes
Desc: not available
URL: <http://lists.alcf.anl.gov/pipermail/llvm-bgq-discuss/attachments/20140207/ad9b657f/attachment-0001.bin>