[Pythonmac-SIG] How to get setuptools to build a Universal Binary?

[Christopher Barker]

Ned Deily wrote:
> No, MySQLdb does have a C extension component.  There should be a 
> _mysql.so there somewhere.  If you build it with easy_install, the 
> unzipped egg layout is:

and if you build it with plain old "setup.py build", you get a build dir 
with:

ls build/lib.macosx-10.3-ppc-2.5/
MySQLdb              _mysql.so            _mysql_exceptions.py


I've just done it straight, with a PPC build of MySQL -- I got:

gcc -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -g 
-bundle -undefined dynamic_lookup 
build/temp.macosx-10.3-ppc-2.5/_mysql.o -L/usr/local/mysql/lib 
-lmysqlclient_r -lz -lm -lmygcc -o build/lib.macosx-10.3-ppc-2.5/_mysql.so
/usr/libexec/gcc/i686-apple-darwin8/4.0.1/ld: for architecture i386
/usr/libexec/gcc/i686-apple-darwin8/4.0.1/ld: warning 
build/temp.macosx-10.3-ppc-2.5/_mysql.o cputype (18, architecture ppc) 
does not match cputype (7) for specified -arch flag: i386 (file not loaded)


which I think makes sense, as _mysql.o was built with the flags from 
mysql-config, which only gives PPC as it's now set on my machine.

However:

$ file build/lib.macosx-10.3-ppc-2.5/_mysql.so
build/lib.macosx-10.3-ppc-2.5/_mysql.so: Mach-O universal binary with 2 
architectures
build/lib.macosx-10.3-ppc-2.5/_mysql.so (for architecture i386): 
Mach-O bundle i386
build/lib.macosx-10.3-ppc-2.5/_mysql.so (for architecture ppc): Mach-O 
bundle ppc


so I did get a universal _mysql.so, but I doubt it would work on a Intel 
machine.

> and, with a fat python config:
> 
> $ file _mysql.so
> _mysql.so: Mach-O universal binary with 2 architectures
> _mysql.so (for architecture i386):  Mach-O bundle i386
> _mysql.so (for architecture ppc):   Mach-O bundle ppc

Ned, how did you built that?

> $ file libmysqlclient_r.16.0.0.dylib
> libmysqlclient_r.16.0.0.dylib: Mach-O universal binary with 3 
> architectures
> libmysqlclient_r.16.0.0.dylib (for architecture i386):   Mach-O 
> dynamically linked shared library i386
> libmysqlclient_r.16.0.0.dylib (for architecture ppc64):  Mach-O 64-bit 
> dynamically linked shared library ppc64
> libmysqlclient_r.16.0.0.dylib (for architecture ppc): Mach-O dynamically 
> linked shared library ppc

and where did you get this? is that from the tarball on the MySQL site?

-Chris



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Christopher Barker, Ph.D.
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