Hi,

[...]
> Littering the yasm code with %ifdefs to support legacy systems is ugly
> and brittle.  Nobody develops on those systems, so devs will continue
> to forget adding all required %ifdefs to their code and binaries will
> crash at runtime on those fringe systems.  Better to error out during
> configure and have people get a working toolchain.

I'm in favor of requiring AVX support. That said, it only removes some
of the problem, not all of the problem. We still have assembler
requirements for FMA, XOP, AVX2 that requires %ifdefs that will continue
littering the yasm code for years to come.

-Justin
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