Well, this is what happens right now:

iMac:subvertpy user$ ./setup.py build -f
running build
running build_py
copying subvertpy/__init__.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy
copying subvertpy/delta.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy
copying subvertpy/marshall.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy
copying subvertpy/properties.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy
copying subvertpy/ra.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy
copying subvertpy/ra_svn.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy
copying subvertpy/server.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy
copying subvertpy/tests/__init__.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
copying subvertpy/tests/test_client.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
copying subvertpy/tests/test_core.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
copying subvertpy/tests/test_delta.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
copying subvertpy/tests/test_marshall.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
copying subvertpy/tests/test_properties.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
copying subvertpy/tests/test_ra.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
copying subvertpy/tests/test_repos.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
copying subvertpy/tests/test_server.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
copying subvertpy/tests/test_wc.py -> build/lib.macosx-10.5-ppc-2.5/subvertpy/tests
running build_ext
building 'subvertpy.client' extension
creating build/temp.macosx-10.5-ppc-2.5
creating build/temp.macosx-10.5-ppc-2.5/subvertpy
gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd -fno-common -dynamic -DNDEBUG -g -Os -Wall -Wstrict-prototypes -DMACOSX -I/usr/include/ffi -DENABLE_DTRACE -arch i386 -arch ppc -pipe -DDARWIN -DSVN_KEYCHAIN_PROVIDER_AVAILABLE=1 -I/usr/include/apr-1 -I/usr/include/apr-1 -I/usr/include/subversion-1 -Isubvertpy -I/System/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5 -c subvertpy/client.c -o build/temp.macosx-10.5-ppc-2.5/subvertpy/client.o
subvertpy/client.c: In function ‘client_mkdir’:
subvertpy/client.c:756: warning: unused variable ‘hash_revprops’
subvertpy/client.c: In function ‘client_mkdir’:
subvertpy/client.c:756: warning: unused variable ‘hash_revprops’
subvertpy/client.c: In function ‘info_get_size’:
subvertpy/client.c:1751: error: ‘svn_info_t’ has no member named ‘size’
subvertpy/client.c:1751: error: ‘SVN_WC_ENTRY_WORKING_SIZE_UNKNOWN’ undeclared (first use in this function)
subvertpy/client.c:1751: error: (Each undeclared identifier is reported only once
subvertpy/client.c:1751: error: for each function it appears in.)
subvertpy/client.c:1753: error: ‘svn_info_t’ has no member named ‘size’
subvertpy/client.c: At top level:
subvertpy/client.c:1846: error: ‘T_PYSSIZET’ undeclared here (not in a function)
subvertpy/client.c:1846: error: ‘svn_info_t’ has no member named ‘working_size’
subvertpy/client.c: In function ‘info_get_size’:
subvertpy/client.c:1751: error: ‘svn_info_t’ has no member named ‘size’
subvertpy/client.c:1751: error: ‘SVN_WC_ENTRY_WORKING_SIZE_UNKNOWN’ undeclared (first use in this function)
subvertpy/client.c:1751: error: (Each undeclared identifier is reported only once
subvertpy/client.c:1751: error: for each function it appears in.)
subvertpy/client.c:1753: error: ‘svn_info_t’ has no member named ‘size’
subvertpy/client.c: At top level:
subvertpy/client.c:1846: error: ‘T_PYSSIZET’ undeclared here (not in a function)
subvertpy/client.c:1846: error: ‘svn_info_t’ has no member named ‘working_size’
lipo: can't open input file: /var/folders/4b/4b+Qm+OQFj8f23emq17tBU+++TM/-Tmp-//cc8p3hDf.out (No such file or directory)
error: command 'gcc' failed with exit status 1