Looks like 1.3.28 is still broken for OSX 10.5... 1.3.25 and older still build fine, and 1.3.26+ will not. They build fine on OSX 10.6 and 10.7, just not 10.5. When building on 10.5 make ends out with this... Undefined symbols: "_xmlSchemaSetValidStructuredErrors", referenced from: _SchemaCache_validate_tree in schema.o _dt_validate in schema.o "_xmlFirstElementChild", referenced from: _link_datatypes in schema.o "_xmlSchemaSetParserStructuredErrors", referenced from: _cache_entry_from_xsd_doc in schema.o _dt_validate in schema.o _cache_entry_from_xdr_doc in schema.o ld: symbol(s) not found collect2: ld returned 1 exit status winegcc: gcc-4.2 failed make[1]: *** [msxml3.dll.so] Error 2 make: *** [dlls/msxml3] Error 2 same way on 1.3.26, 1.3.27, and 1.3.28 .... seems odd.