[Pythonmac-SIG] 64-bit mode no work

[Lars Clausen]

On Feb 22, 2009, at 12:00 PM, pythonmac-sig-request at python.org wrote:

>
> In article <DEF20F43-12BB-4397-9214-8C6A292AF37E at raeder.dk>,
> Lars Clausen <lars at raeder.dk> wrote:
>> I've been trying to get mod_python and mysql to work on my Intel
>> MacBook Leopard, but with very little luck. [...]
>
> What about the MySQL library itself, i.e. libmysqlclient?  Do you  
> have a
> 64-bit version of it?  The standard distribution from MySQL is not
> 4-way, (and, for 5.1.30 at least, it's broken for 2-way:
> <http://bugs.mysql.com/bug.php?id=41940>).

Hedwig:local larsrc$ ls -ld /usr/local/mysql*
lrwxr-xr-x   1 root  wheel   27 Feb 19 20:26 /usr/local/mysql ->  
mysql-5.0.77-osx10.5-x86_64
Hedwig:Sources larsrc$ file /usr/local/mysql-5.0.77-osx10.5-x86_64/lib/ 
libmysqlclient_r.15.0.0.dylib
/usr/local/mysql-5.0.77-osx10.5-x86_64/lib/libmysqlclient_r. 
15.0.0.dylib: Mach-O 64-bit dynamically linked shared library x86_64

However, importing MySQLdb in python directly shows something  
interesting:

 >>> import MySQLdb
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "build/bdist.macosx-10.5-universal/egg/MySQLdb/__init__.py",  
line 19, in <module>
   File "build/bdist.macosx-10.5-universal/egg/_mysql.py", line 7, in  
<module>
   File "build/bdist.macosx-10.5-universal/egg/_mysql.py", line 6, in  
__bootstrap__
ImportError: dlopen(/Users/larsrc/.python-eggs/MySQL_python-1.2.2- 
py2.6-macosx-10.5-universal.egg-tmp/_mysql.so, 2): Library not  
loaded: /usr/local/mysql/lib/libmysqlclient_r.16.dylib
   Referenced from: /Users/larsrc/.python-eggs/MySQL_python-1.2.2- 
py2.6-macosx-10.5-universal.egg-tmp/_mysql.so
   Reason: image not found

It tries to fine the .16 version, but the 64-bit mysql has the .15  
version:

Hedwig:local larsrc$ locate libmysqlclient_r | grep .0.0
/usr/local/mysql-5.0.77-osx10.5-x86_64/lib/libmysqlclient_r.15.0.0.dylib
/usr/local/mysql-5.1.31-osx10.5-x86/lib/libmysqlclient_r.16.0.0.dylib

Linking /usr/local/mysql/lib/mysql and recompiling MySQLdb from fresh  
sources gave an egg that looks for the .15 version, but now it is back  
to the 'does not define init function'. No luck on that.

 >>> import MySQLdb
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "build/bdist.macosx-10.5-universal/egg/MySQLdb/__init__.py",  
line 19, in <module>
   File "build/bdist.macosx-10.5-universal/egg/_mysql.py", line 7, in  
<module>
   File "build/bdist.macosx-10.5-universal/egg/_mysql.py", line 6, in  
__bootstrap__
ImportError: dynamic module does not define init function (init_mysql)

I have cleared out my old eggs and checked that the egg used here is  
64-bit.

>>
>> Any ideas also why there is no 64-bit installation of Python for Mac?
>> Given the presence of fat binaries, it seems like it would be a
>> trivial task to have it.
>
> The support for 4-way universal builds in python is relatively new.
> There has been some discussion recently on the python-dev list about
> providing "official" 4-way installers for OS X.  This will probably  
> get
> discussed more at the upcoming PyCon.

I hope so. All this grief has had me casting about for another  
language to do really simple MySQL-to-JSON web services, but I have  
found nothing that does it as well as Python and Publisher.

-Lars

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