Unable to build python bindings (libxml2 2.6.20, python 2.3.5, mac os x 10.3.9)

Error with python2.3.5

running build
running build_py
running build_ext
building 'libxml2mod' extension
gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp 
-mno-fused-madd -fno-common -DNDEBUG -g -O3 -Wall -Wstrict-prototypes 
-D_REENTRANT=1 -I/usr/include/libxml2 -I/usr/include 
-I/usr/local/include/python2.3 -c types.c -o 
build/temp.darwin-7.9.0-Power_Macintosh-2.3/types.o
In file included from types.c:9:
libxml_wrap.h:124: error: parse error before "xmlErrorPtr"
libxml_wrap.h:124: warning: no semicolon at end of struct or union
libxml_wrap.h:125: warning: type defaults to `int' in declaration of 
`PyError_Object'
libxml_wrap.h:125: warning: data definition has no type or storage class
libxml_wrap.h:245: error: parse error before "error"
libxml_wrap.h:245: warning: function declaration isn't a prototype
types.c:723: error: parse error before "error"
types.c:724: warning: function declaration isn't a prototype
types.c: In function `libxml_xmlErrorPtrWrap':
types.c:730: error: `error' undeclared (first use in this function)
types.c:730: error: (Each undeclared identifier is reported only once
types.c:730: error: for each function it appears in.)
error: command 'gcc' failed with exit status 1


Error with Python 2.4.1

running build
running build_py
running build_ext
building 'libxml2mod' extension
gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp 
-mno-fused-madd -fno-common -fno-common -dynamic -DNDEBUG -g -O3 -Wall 
-Wstrict-prototypes -D_REENTRANT=1 -I/usr/include/libxml2 -I/usr/include 
-I/Library/Frameworks/Python.framework/Versions/2.4/include/python2.4 -c 
libxml2-py.c -o build/temp.darwin-7.9.0-Power_Macintosh-2.4/libxml2-py.o
In file included from libxml2-py.c:7:
libxml_wrap.h:124: error: parse error before "xmlErrorPtr"
libxml_wrap.h:124: warning: no semicolon at end of struct or union
libxml_wrap.h:125: warning: type defaults to `int' in declaration of 
`PyError_Object'
libxml_wrap.h:125: warning: data definition has no type or storage class
libxml_wrap.h:245: error: parse error before "error"
libxml_wrap.h:245: warning: function declaration isn't a prototype
libxml2-py.c: In function `libxml_xmlSchemaWhiteSpaceReplace':
...
more

Python 2.3.5 (#1, May 25 2005, 18:29:45)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1666)] on darwin

Mac OS X 10.3.9
XCode 1.5
Darwin Ports

Darwin Ports has only libxml2 2.6.19 which fails with the same error 
message so I tried 2.6.20 which fails, too.

Christian