erik flister added the comment:
thanks a lot for the detailed info steve, very clearly stated!
> Yeah, geos_c.dll really should have exported its own free() function.
> find_library('c') is probably the wrong approach here - if geos_c.dll is
> being rebuilt with different CRTs at all then the free() function should be
> added to it, and if it's truly legacy and is no longer being rebuilt then the
> version of the CRT it uses should be loaded explicitly. It isn't
> automatically getting the same version as whatever version of Python is
> running, that's for sure.
well, shapely's installation instructions from windows are to use chris
gohlke's prebuilt binaries from here: http://www.lfd.uci.edu/~gohlke/pythonlibs/
i assume he's coordinating the crt versions? apparently a lot of people use
these.
i'm not clear on why gohlke's stuff is necessary, and why pypi/pip/distutils is
not adequate -- shapely is the only library i've run into that needed gohlke's
binaries. of course, i didn't try to install numpy/scipy manually, the
internet said that this is hard on windows, and to just use something like
winpython/pythonxy. are these problems all related to this crt issue?
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<http://bugs.python.org/issue24429>
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