tunabrain/tungsten — pull request #1 by CounterPillow (2014-09-17 17:03:52+00:00)
Title: Add detection for CPU model 69 (Haswell ix-4xxxU)

*i5-4200U* and *i7-4500U* (and possibly more) are model 69, which previously was not detected properly, which triggered a fallback to optimisations core 2 which apparently fails to compile due to conflicting definitions of intrinsics.

I did not investigate the resulting conflicts further, but they seem to imply that something else is already correctly defining the intrinsics and the fallback tries to redefine them.