Bug Description

Compilation failed due to code reorganization in xtensor repository (xtensor-stack/xtensor#2829).

Steps to Reproduce

Follow the instructions Manually Installing from Source for macOS

Environment

OpenMC develop branch, macOS on Apple M3 chip.

Notes

The compilation and installation was success after changing the xtensor include path manually. Or probably using script (not tested) as mentioned here (xtensor-stack/xtensor#2851). The other option maybe downgrade the version of xtensor.