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Re: testing plpython3u on 9.0beta2

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Chris <rfusca(at)gmail(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: testing plpython3u on 9.0beta2
Date: 2010-06-23 11:17:12
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On Tue, Jun 22, 2010 at 10:41 PM, Chris <rfusca(at)gmail(dot)com> wrote:
> I received two errors (described below) in installing 9.0beta2 on Kubuntu
> 10.04 , RhodiumToad on IRC recommended I post them here.
> I did not have a 2.x or 3.x python dev installed, but I was really only
> interested in python3 via plython3u.
> So...
> sudo apt-get install python3-all-dev
> Configure works fine...
> "./configure --with-pgport=5433 --with-python --with-ossp-uuid --with-libxml
> --with-libxslt --with-perl"
> "make" fails while trying to build plpython, Cannot find python.h i
> believe....(I sadly did not save the text of the error and have since
> continued onward.  But it was not finding a file while building plpython.  I
> believe I would have to uninstall a few things to reproduce.)
> So I tried installing the 2.x dev.  After running "sudo apt-get install
> python-all-dev" then "make;make check;sudo make install", it all worke fine.
> However,  when issuing a "createlang plpython3u template1", I get
> "createlang: language installation failed: ERROR:  could not access file
> "$libdir/plpython3": No such file or directory".  But if I "createlang
> plpython2u template1" first, then it will allow "createlang plpython3u
> template1".
> Am I doing something incorrect, or...?
> (As an aside, functions created with LANGUAGE plpython3u appear to work.)

I can reproduce this, here.  The problem seems to be that plpython
only build either or, but both languages
expect a call handler called plython_call_handler.  So once we load
the shared library for one language, the other language just grabs the
same call handler.

Robert Haas
The Enterprise Postgres Company

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