[Numpy-discussion] CFLAGS= causes bad build

[Charles R Harris]

Having an empty CFLAGS environment variable and running

$ python setup.py build

emits tons of these messages:

numpy/core/src/scalartypes.inc.src: In function 'scalar_value':
numpy/core/src/scalartypes.inc.src:77: warning: dereferencing type-punned
pointer will break strict-aliasing rules

The compile flags are missing -fno-strict-aliasing. I don't know if this is
a problem with the python distutils or what, but it would be nice if it
didn't occur.

Chuck
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