Trouble compiling Zope 2.4.1 on Mac OS 10.1:

installed a fresh 10.1 that I just got from Apple

downloaded the Zope 2.4.1 src

tried 'python wo_pcgi' with both a Python 2.2a4 I just made and with my previous Python 2.1, both with and without sudo

Whatever I do, it breaks in the same place.  Here's the end of the output:

sed -f sedscript ./Makefile.pre.in >Makefile.pre
/usr/local/lib/python2.1/config/makesetup \
         -m Makefile.pre -c /usr/local/lib/python2.1/config/config.c.in Setup -n  /usr/local/lib/py\
thon2.1/config/Setup.config /usr/local/lib/python2.1/config/Setup.local /usr/local/lib/python2.1/co\
nfig/Setup
make -f Makefile do-it-again
/usr/local/lib/python2.1/config/makesetup \
         -m Makefile.pre -c /usr/local/lib/python2.1/config/config.c.in Setup -n  /usr/local/lib/py\
thon2.1/config/Setup.config /usr/local/lib/python2.1/config/Setup.local /usr/local/lib/python2.1/co\
nfig/Setup
make
cc  -g -O2 -Wall -Wstrict-prototypes -I/usr/local/include/python2.1 -I/usr/local/include/python2.1 \
-DHAVE_CONFIG_H  -I../Components/ExtensionClass/src -c ././../Components/ExtensionClass/src/Extensi\
onClass.c -o ./ExtensionClass.o
In file included from /usr/local/include/python2.1/pyport.h:84,
                 from /usr/local/include/python2.1/Python.h:54,
                 from ././../Components/ExtensionClass/src/ExtensionClass.h:114,
                 from ././../Components/ExtensionClass/src/ExtensionClass.c:61:
/usr/include/math.h:191: warning: function declaration isn't a prototype
cc  -bundle -undefined suppress  ./ExtensionClass.o   -o ./ExtensionClass.so
/usr/bin/ld: -undefined error must be used when -twolevel_namespace is in effect
make: *** [ExtensionClass.so] Error 1
Traceback (most recent call last):
  File "wo_pcgi.py", line 117, in ?
  File "wo_pcgi.py", line 105, in main
  File "/usr/local/src/Zope-2.4.1-src/inst/build_extensions.py", line 102, in ?
    make('lib','python')
  File "/usr/local/src/Zope-2.4.1-src/inst/do.py", line 135, in make
    do('make')
  File "/usr/local/src/Zope-2.4.1-src/inst/do.py", line 104, in do
    if i and picky: raise SystemError, i
SystemError: 512

The 'two-level namespace' business is a change from the OX X developer tools version 10.0 to 10.1.

Anyone know what's going on here and how to fix it?
--

    --- Mitchell