[WPE-2.40] GCC 12 build error: invalid conversion

[kinnairdclan]

building wpewebkit 2.40.3 fails on the latest buildroot, with GCC 12, that has succeeded in the past:

/home/jrk/src/buildroot-pi/output/build/wpewebkit-2.40.3/Source/WebCore/xml/XSLStyleSheetLibxslt.cpp: In
member function ‘bool WebCore::XSLStyleSheet::parseString(const WTF::String&)’:
/home/jrk/src/buildroot-pi/output/build/wpewebkit-2.40.3/Source/WebCore/xml/XSLStyleSheetLibxslt.cpp:143:
129: error: invalid conversion from ‘void (*)(void*, xmlError*)’ {aka ‘void (*)(void*, _xmlError*)’} to ‘
xmlStructuredErrorFunc’ {aka ‘void (*)(void*, const _xmlError*)’} [-fpermissive]
  143 |     XMLDocumentParserScope scope(cachedResourceLoader(), XSLTProcessor::genericErrorFunc, XSLTPro
cessor::parseErrorFunc, console);
      |
                               ^
      |
                               |
      |
                               void (*)(void*, xmlError*) {aka void (*)(void*, _xmlError*)}
In file included from /home/jrk/src/buildroot-pi/output/build/wpewebkit-2.40.3/Source/WebCore/xml/XSLStyl
eSheetLibxslt.cpp:34:
/home/jrk/src/buildroot-pi/output/build/wpewebkit-2.40.3/Source/WebCore/xml/parser/XMLDocumentParserScope
.h:47:99: note:   initializing argument 3 of ‘WebCore::XMLDocumentParserScope::XMLDocumentParserScope(Web
Core::CachedResourceLoader*, xmlGenericErrorFunc, xmlStructuredErrorFunc, void*)’
   47 |         XMLDocumentParserScope(CachedResourceLoader*, xmlGenericErrorFunc, xmlStructuredErrorFunc
 structuredErrorFunc = 0, void* errorContext = nullptr);
      |                                                                            ~~~~~~~~~~~~~~~~~~~~~~
~^~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/jrk/src/buildroot-pi/output/build/wpewebkit-2.40.3/WebCore/DerivedSources/uni
fied-sources/UnifiedSource-42f7b70e-4.cpp:6:
/home/jrk/src/buildroot-pi/output/build/wpewebkit-2.40.3/Source/WebCore/xml/XSLTProcessorLibxslt.cpp: In
function ‘xmlDoc* WebCore::docLoaderFunc(const xmlChar*, xmlDictPtr, int, void*, xsltLoadType)’:
/home/jrk/src/buildroot-pi/output/build/wpewebkit-2.40.3/Source/WebCore/xml/XSLTProcessorLibxslt.cpp:134:
34: error: invalid conversion from ‘void (*)(void*, xmlError*)’ {aka ‘void (*)(void*, _xmlError*)’} to ‘x
mlStructuredErrorFunc’ {aka ‘void (*)(void*, const _xmlError*)’} [-fpermissive]
  134 |         xmlSetStructuredErrorFunc(console, XSLTProcessor::parseErrorFunc);
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                  |
      |                                  void (*)(void*, xmlError*) {aka void (*)(void*, _xmlError*)}

Do I need to enable -fpermissive in the CXXFLAGS? Let me know if I can get you any other dependency information.

[kinnairdclan]

I'll close as I think my build env is non-standard and doesn't deserve attention, using a branch based off of Buildroot release 2023.11 succeeded. Thank you.