[issue21167] float('nan') returns 0.0 on Python compiled with icc

[Hrvoje Nikšić]

Hrvoje Nikšić added the comment:

Note that defaulting to unsafe math in extensions will make *their* use of the Py_NAN macro break under icc.

If we go that route ("-fp-model strict" for Python build, but not for extensions), we should also apply the attached patch that defines Py_NAN as Py_HUGE_VAL / Py_HUGE_VAL.

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<http://bugs.python.org/issue21167>
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