OpenMPI/2.1.1-GCC-6.4.0-2.28 build fails if ucx-devel is installed on system

[jabl]

The easyconfig OpenMPI/2.1.1-GCC-6.4.0-2.28 (part of the foss/2017b toolchain) fails to build with the error below:

Making all in mca/pml/ucx
make[2]: Entering directory `/l/easybuild/build/OpenMPI/2.1.1/GCC-6.4.0-2.28/openmpi-2.1.1/ompi/mca/pml/ucx'
  CC       pml_ucx.lo
  CC       pml_ucx_request.lo
  CC       pml_ucx_datatype.lo
  CC       pml_ucx_component.lo
  CCLD     libmca_pml_ucx.la
libtool:   error: require no space between '-L' and '-lrt'
make[2]: *** [libmca_pml_ucx.la] Error 1

Removing the rpm package "ucx-devel" fixes it. ucx-devel is installed as part of Mellanox OFED drivers (this is on CentOS 7). Most likely the culprit is open-mpi/ompi#4345

[boegel]

@jabl Thanks for reporting this...

Since this is a bug upstream, how do you suggest we handle this, try to patch the configure script?

[jabl]

Yeah, well, seems 2.1.2 doesn't have the fix and 2.1.3 isn't out yet, so yeah, I guess adding ggouaillardet/ompi@7a3ace1 to the easyconfig file could do the trick (I haven't tested that myself, I just worked around it by temporarily uninstalling ucx-devel)

[boegel]

@wpoely86 This is the same issue you were seeing in #5768?

[wpoely86]

Yes, it's the same.

[boegel]

@jabl It's not as simple as just applying the patch from ggouaillardet/ompi@7a3ace1, we'll need to regenerate the configure script too...

@wpoely86 Do you think it's worth the trouble to try and patch this? I'm inclined to try and fix this since this affects OpenMPI-2.1.2-GCC-6.4.0-2.28.eb which is part of foss/2018a...

Can we come up with a direct patch for the configure script?

[boegel]

Or maybe we should include --without-ucx in the easyconfig for this particular Open MPI version to dance around this, as suggested by @hajgato on the EasyBuild mailing list?

[boegel]

@jabl @wpoely86 Proposed @OleHolmNielsen Proposed workaround in #5949

[boegel]

follow-up in #5949