Fails to build with libxml2 2.13+, error: incompatible function pointer types passing 'void (*)(void *, xmlErrorPtr)' (aka 'void (*)(void *, struct _xmlError *)') to parameter of type 'xmlStructuredErrorFunc' (aka 'void (*)(void *, const struct _xmlError *)') PR: 279961 Approved by: maintainer timeout, 11+ months