HI Folks Following from a DIALS issue about it being slow on Windows https://github.com/dials/dials/issues/1666 I have fallen into a rabbit hole and I am trying to build DIALS (and hence cctbx) on Windows with the intel compilers from oneAPI - however I keep stumbling over linking errors with e.g. undefined symbol __floor Should I abandon hope or has someone done this? I know this is not a new path to tread as windows_icc was a defined combination on the SConscripts I had had to hack some bits around a little presumably to accommodate 2021 versions of icc compilers, but this felt like I was going down a bad path Would welcome input from anyone who can help - currently windows DIALS is a pretty poor relation It is noteworthy however that parallel operation does now appear to work on Windows with easy mp :-) In other news - has anyone considered adding clang support with clang coming from conda? Could make for more consistency in the builds… I had a look at how one may go about doing this but rapidly found myself in SCons hell. Thanks in advance for any help & all the best Graeme -- This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail. Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom