M.-A. Lemburg wrote: > Also note that Python will complain loudly when you try to load > a UCS2 extension in a UCS4 build and vice-versa. We've made sure > that any extension using the Python Unicode C API has to be built > for the same UCS version of Python. This is done by using different > names for the C APIs at the C level. > >> These are not isolated incidents. The following google searches >> suggest that a number of people spend time trying to figure out why >> Python extension modules fail on their linux systems: >> >> http://www.google.com/search?q=PyUnicodeUCS4_FromUnicode+undefined+symbol >> http://www.google.com/search?q=+PyUnicodeUCS2_FromUnicode+undefined+symbol >> http://www.google.com/search?q=_PyUnicodeUCS2_AsDefaultEncodedString+undefined+symbol > > Perhaps we should add a FAQ entry for these linker errors > (which are caused by the mentioned C API changes to prevent > mixing UCS version) ?!
There already is one: http://www.python.org/doc/faq/extending/#when-importing-module-x-why-do-i-get-undefined-symbol-pyunicodeucs2 I wonder why it doesn't show up in the Google searches. > Here's a quick way to determine you Python Unicode build type: > > python -c "import sys;print((sys.maxunicode<66000)and'UCS2'or'UCS4')" > > Perhaps we should include this info as well as an 32/64-bit indicator > and the processor type in the Python startup line: > > # python > Python 2.6 (r26:66714, Feb 3 2009, 20:49:49, UCS4, 64-bit, x86_64) > [GCC 4.3.2 [gcc-4_3-branch revision 141291]] on linux2 > Type "help", "copyright", "credits" or "license" for more information. > > This would help users find the right binaries to install as > extension. Regards, -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Sep 28 2009) >>> Python/Zope Consulting and Support ... http://www.egenix.com/ >>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ ::: Try our new mxODBC.Connect Python Database Interface for free ! :::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com