On Fri, Feb 26, 2010 at 11:26 AM, Charles R Harris < charlesr.har...@gmail.com> wrote:
> > > On Fri, Feb 26, 2010 at 10:53 AM, <josef.p...@gmail.com> wrote: > >> On Fri, Feb 26, 2010 at 12:50 PM, Charles R Harris >> <charlesr.har...@gmail.com> wrote: >> > >> > >> > On Fri, Feb 26, 2010 at 10:44 AM, <josef.p...@gmail.com> wrote: >> >> >> >> On Fri, Feb 26, 2010 at 12:41 PM, Charles R Harris >> >> <charlesr.har...@gmail.com> wrote: >> >> > >> >> > >> >> > On Fri, Feb 26, 2010 at 10:34 AM, Pauli Virtanen <p...@iki.fi> wrote: >> >> >> >> >> >> pe, 2010-02-26 kello 12:26 -0500, josef.p...@gmail.com kirjoitti: >> >> >> [clip] >> >> >> > recompiling wouldn't be enough, the cython c files also need to be >> >> >> > regenerated for a different numpy version. >> >> >> > (If I understand the problem correctly.) >> >> >> >> >> >> No. The Cython-generated sources just use sizeof(PyArray_Descr), the >> >> >> value is not hardcoded, so it's a compile-time issue. >> >> > >> >> > So Ralf need to be sure that scipy was compiled against, say, >> numpy1.3. >> >> >> >> I think I mixed up some things then, >> >> scipy 0.7.1 cython files should be regenerated with the latest cython >> >> release so that it doesn't check the sizeof anymore. >> >> Then, a scipy 0.7.1 build against numpy 1.3 would also work without >> >> recompiling against numpy 1.4.1 >> >> >> >> Is this correct? >> >> >> > >> > Yes, but the aim of 1.4.1 is that it should work with the existing >> binaries >> > of scipy, i.e., it should be backward compatible with no changes in >> dtype >> > sizes and such so that even files generated with the old cython >> shouldn't >> > cause problems. >> >> We had this discussion but David said that this is impossible, binary >> compatibility doesn't remove the (old) cython problem. >> >> > Depends on what you mean by binary compatibility. If something is added to > the end of a structure, then it is still backwards compatible because the > offsets of old entries don't change, but the old cython will fail in that > case because the size changes. If the sizes are all the same, then there > should be no problem and that is what we are shooting for. There are > additions to the c_api in 1.4 but I think that structure is private. > > I note that there are still traces of datetime in the 1.4.x public include files, although the desc size looks right. Chuck
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