Define macro when invoking setup.py

[Christian Heimes]

Am 09.11.2010 03:09, schrieb Jason:
> I'd like to be able switch between building my C extension with a
> certain preprocessor macro defined or not defined. I'm using the
> rudimentary distutils setup.py example given here:
> 
> http://docs.python.org/extending/building.html
> 
> Is there a command line option that distutils.core.setup() will
> interpret for me, like the "-D" option for gcc? Or do I need to do
> something more complicated? (I had a brief look at the
> distutils.command.build_* docs... but they're pretty sparse.)

You were looking at the wrong manual. Read
http://docs.python.org/distutils/setupscript.html#preprocessor-options

Extension(...,
          define_macros=[('NDEBUG', '1'),
                         ('HAVE_STRFTIME', None)],
          undef_macros=['HAVE_FOO', 'HAVE_BAR'])

Note that define_macros requires a list of tuples each having two members.

Christian