py312-lxml @4.9.3: error: incompatible function pointer types assigning to 'xmlStructuredErrorFunc'

[rrobtoo (Robert K.)]

Hi Team,
The py312-lxml compilation fails with the following error

:debug:main Starting logging for py312-lxml @4.9.3_0
:debug:sysinfo macOS 14.4 (darwin/23.4.0) arch arm
:debug:sysinfo MacPorts 2.9.1
:debug:sysinfo Xcode 15.3, CLT 15.3.0.0.1.1708646388
:debug:sysinfo SDK 14
:debug:sysinfo MACOSX_DEPLOYMENT_TARGET: 14.0

:info:build creating build/temp.macosx-14.0-arm64-cpython-312/src/lxml
:info:build /usr/bin/clang -fno-strict-overflow -fno-common -dynamic -DNDEBUG -g -O3 -Wall -pipe -Os -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk -arch arm64 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk -DCYTHON_CLINE_IN_TRACEBACK=0 -I/opt/ports/include/libxml2 -Isrc -Isrc/lxml/includes -I/opt/ports/Library/Frameworks/Python.framework/Versions/3.12/include/python3.12 -c src/lxml/etree.c -o build/temp.macosx-14.0-arm64-cpython-312/src/lxml/etree.o -w -flat_namespace
:info:build src/lxml/etree.c:113152:38: error: incompatible function pointer types assigning to 'xmlStructuredErrorFunc' (aka 'void (*)(void *, const struct _xmlError *)') from 'void (void *, xmlError *)' (aka 'void (void *, struct _xmlError *)') [-Wincompatible-function-pointer-types]
:info:build   __pyx_v_self->_c_ctxt->sax->serror = __pyx_f_4lxml_5etree__receiveParserError;
:info:build                                      ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build src/lxml/etree.c:117640:25: error: incompatible function pointer types assigning to 'xmlStructuredErrorFunc' (aka 'void (*)(void *, const struct _xmlError *)') from 'void (void *, xmlError *)' (aka 'void (void *, struct _xmlError *)') [-Wincompatible-function-pointer-types]
:info:build     __pyx_v_sax->serror = __pyx_f_4lxml_5etree__receiveParserError;
:info:build                         ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build src/lxml/etree.c:181724:28: error: incompatible function pointer types assigning to 'xmlStructuredErrorFunc' (aka 'void (*)(void *, const struct _xmlError *)') from 'void (void *, xmlError *)' (aka 'void (void *, struct _xmlError *)') [-Wincompatible-function-pointer-types]
:info:build   __pyx_v_xpathCtxt->error = __pyx_f_4lxml_5etree__receiveXPathError;
:info:build                            ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build src/lxml/etree.c:218998:60: error: incompatible function pointer types passing 'void (void *, xmlError *)' (aka 'void (void *, struct _xmlError *)') to parameter of type 'xmlStructuredErrorFunc' (aka 'void (*)(void *, const struct _xmlError *)') [-Wincompatible-function-pointer-types]
:info:build   xmlRelaxNGSetParserStructuredErrors(__pyx_v_parser_ctxt, __pyx_f_4lxml_5etree__receiveError, ((void *)__pyx_v_self->__pyx_base._error_log));
:info:build                                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build /opt/ports/include/libxml2/libxml/relaxng.h:156:30: note: passing argument to parameter 'serror' here
:info:build                                          xmlStructuredErrorFunc serror,
:info:build                                                                 ^
:info:build src/lxml/etree.c:219416:60: error: incompatible function pointer types passing 'void (void *, xmlError *)' (aka 'void (void *, struct _xmlError *)') to parameter of type 'xmlStructuredErrorFunc' (aka 'void (*)(void *, const struct _xmlError *)') [-Wincompatible-function-pointer-types]
:info:build     xmlRelaxNGSetValidStructuredErrors(__pyx_v_valid_ctxt, __pyx_f_4lxml_5etree__receiveError, ((void *)__pyx_v_self->__pyx_base._error_log));
:info:build                                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build /opt/ports/include/libxml2/libxml/relaxng.h:185:31: note: passing argument to parameter 'serror' here
:info:build                                           xmlStructuredErrorFunc serror, void *ctx);
:info:build                                                                  ^
:info:build src/lxml/etree.c:220305:59: error: incompatible function pointer types passing 'void (void *, xmlError *)' (aka 'void (void *, struct _xmlError *)') to parameter of type 'xmlStructuredErrorFunc' (aka 'void (*)(void *, const struct _xmlError *)') [-Wincompatible-function-pointer-types]
:info:build   xmlSchemaSetParserStructuredErrors(__pyx_v_parser_ctxt, __pyx_f_4lxml_5etree__receiveError, ((void *)__pyx_v_self->__pyx_base._error_log));
:info:build                                                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build /opt/ports/include/libxml2/libxml/xmlschemas.h:156:30: note: passing argument to parameter 'serror' here
:info:build                                          xmlStructuredErrorFunc serror,
:info:build                                                                 ^
:info:build src/lxml/etree.c:220848:59: error: incompatible function pointer types passing 'void (void *, xmlError *)' (aka 'void (void *, struct _xmlError *)') to parameter of type 'xmlStructuredErrorFunc' (aka 'void (*)(void *, const struct _xmlError *)') [-Wincompatible-function-pointer-types]
:info:build     xmlSchemaSetValidStructuredErrors(__pyx_v_valid_ctxt, __pyx_f_4lxml_5etree__receiveError, ((void *)__pyx_v_self->__pyx_base._error_log));
:info:build                                                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build /opt/ports/include/libxml2/libxml/xmlschemas.h:185:30: note: passing argument to parameter 'serror' here
:info:build                                          xmlStructuredErrorFunc serror,
:info:build                                                                 ^

[ryandesign (Ryan Carsten Schmidt)]

Here is ​the upstream bug report and ​their fix which is included in version 5.0.0 to which the port should be updated (or to 5.1.0).