[Python-Dev] please consider changing --enable-unicode default to ucs4 (original) (raw)

M.-A. Lemburg mal at egenix.com
Thu Oct 8 09:47:03 CEST 2009

Adam Olsen wrote:

On Sun, Sep 20, 2009 at 10:17, Zooko O'Whielacronx <zookog at gmail.com> wrote:

On Sun, Sep 20, 2009 at 8:27 AM, Antoine Pitrou <solipsis at pitrou.net> wrote:

AFAIK, C extensions should fail loading when they have the wrong UCS2/4 setting.

That would be an improvement! Unfortunately we instead get mysterious misbehavior of the module, e.g.: http://bugs.python.org/setuptools/msg309 http://allmydata.org/trac/tahoe/ticket/704#comment:5

I agree that a better error message would help. I'm just not sure how to achieve that.

The error message you currently see gets generated by the dynamic linker trying to resolve a Python Unicode API symbol: the API names are mangled to assure that you cannot mix UCS2 interpreters and UCS4 extensions (and vice-versa).

We could try to scan the linker error message for 'Py.*UCS.' and then replace the message with a more helpful one (in importdl.c), but I'm not sure how portable that is.

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