[Numpy-discussion] numpy.sqrt behaving differently on MacOS Lion

[Ilan Schnell]

MacOS Lion:
>>> numpy.sqrt([complex(numpy.nan, numpy.inf)])
array([ nan+infj])

Other all system:
array([ inf+infj])

This causes a few numpy tests to fail on Lion.  The numpy
was not compiled using the new LLVM based gcc, it is the
same numpy binary I used on other MacOS systems, which
was compiled using gcc-4.0.1.  However on Lion it is linked
to Lions LLVM based gcc runtime, which apparently has some
different behavior when it comes to such strange complex
values.

- Ilan