Michael Sternberg 726c7e0f06 Opt avx (#7486) ... * Promote to Autotools for simplicity; broaden Intel CPU opt targeting from SSE4.2 to AVX2 * make Intel CPU opt targeting same as in ../libxc * flake8 W291 * use canonical means to pass (ahem) the test phase, h/t @adamjstewart * revert f25d598 (unrelated merge) * re-merge		2018-03-21 19:53:19 -05:00
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spack	Opt avx (#7486)	2018-03-21 19:53:19 -05:00