Polychord error in COBAYA with intel oneapi

[dkhaz]

Hello:

I am facing the following issue while trying to run polychord sampler with cobaya:

import _pypolychord
ImportError: /opt/intel/oneapi/mpi/2021.11/lib/libmpifort.so.12: undefined symbol: MPIR_F_MPI_IN_PLACE

Ifort version:
ifort (IFORT) 2021.11.1 20231117

I had some issues in doing cobaya-install polychord as it returning mpicc non-zero status. So, in the polychord download folder, in
Makefile_intel I removed -ipo, -no-prec-div and -vec-report0 that are not compatible with new intel oneapi compilers. After that make executes without error. Following that python setup.py install and cobaya-install polychord --packages-path [path] runs without errors.

But the cobaya-run throws up MPIR_F_MPI_IN_PLACE issue. CosmoChord with the same configuration runs without issues (so removal of flags are not a problem.).

import _pypolychord within python does not throw the same error.

Any idea ?

Cheers,
Dhiraj

[lukashergt]

This is more of a PolyChord issue than a Cobaya issue. PolyChord's Makefile is not set up for the new oneapi compilers.

I have a Makefile_oneapi in a PolyChord branch. If you manually install that (make sure to clean up any existing PolyChord instances), things might work.