Cross-building CPU variants

[Peter Jeremy]

A have an AMD GX-412TC (Jaguar) and would like to cross-build an optimised
version (ie CPUTYPE?=btver2) of FreeBSD (and ports) on my Intel IvyBridge
system.  Unfortunately, this fails because CPUTYPE?=btver2 causes Clang to
generate instructions that aren't supported on IvyBridge.

Does anyone have any suggestions on how to make this work?


-- 
Peter Jeremy
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