[cctbxbb] Boost broken on mac?

richard.gildea at diamond.ac.uk richard.gildea at diamond.ac.uk
Thu Apr 7 05:55:40 PDT 2016

After adding those 'fixes' in my previous email, the other failing test (dials/test/algorithms/refinement/tst_multi_experiment_refinement.py) now crashes in a different place, I have tracked this down thus far to the call to af::matrix_inversion_in_place(covinv.ref()); in https://github.com/dials/dials/blob/master/algorithms/refinement/outlier_detection/mahalanobis.h#L28

There does seem to be something really quite wrong with the latest clang :-(

Dr Richard Gildea
Data Analysis Scientist
Tel: +441235 77 8078

Diamond Light Source Ltd.
Diamond House
Harwell Science & Innovation Campus
OX11 0DE

From: cctbxbb-bounces at phenix-online.org [cctbxbb-bounces at phenix-online.org] on behalf of Luc Bourhis [luc_j_bourhis at mac.com]
Sent: 07 April 2016 13:51
To: cctbx mailing list
Subject: Re: [cctbxbb] Boost broken on mac?

> It turns out we need both the 'volatile' trick on line 19 and removing the -fno-honor-nans compiler flag in order to work around the problem at line 40. Neither workaround is sufficient on their own.

I had started to test removing/adding flags one by one too for cctbx/xray/convert.h. Just had a look at the outcomes: in that case, removing -fno-honor-nans is enough; the volatile hack can be removed. It makes no sense to me but that’s usually the case with optimiser bugs.

Well, anyway, we are walking on a tight rope with Xcode 7.3, and perhaps even onward since clang trunk brings the same havoc.

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