[Numpy-discussion] Byte aligned arrays
heng at cantab.net
Thu Dec 20 15:09:24 EST 2012
On Thu, 2012-12-20 at 21:05 +0100, Sturla Molden wrote:
> On 20.12.2012 20:57, Sturla Molden wrote:
> > On 20.12.2012 20:52, Henry Gomersall wrote:
> >> Perhaps the DLL should go and read MS's edicts!
> > Do you link with same same CRT as Python? (msvcr90.dll)
> > You should always use -lmsvcr90.
> > If you don't, you will link with msvcrt.dll.
> Here is VS2008, which uses malloc from msvcr90.dll:
> "malloc is required to return memory on a 16-byte boundary"
> If this does not happen, you are linking with the wrong CRT. When
> building C extensions for Python, we should always link with the same
> CRT as Python uses, unless you are 100% certain that CRT resources
> never shared with Python.
Is this something that can be established when using Cython? I haven't
experienced any problems so far (other than a now solved problem trying
to free memory allocated in FFTW which was down to a runtime mismatch).
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