[Webkit-unassigned] [Bug 266051] New: Build fails with libxml2 version 2.11.x-prior due to API change

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=266051

            Bug ID: 266051
           Summary: Build fails with libxml2 version 2.11.x-prior due to
                    API change
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dave at killthe.net

See https://bugs.webkit.org/show_bug.cgi?id=265128. libxml2 2.12.0+ xmlStructuredErrorFunc second parameter has been changed to 'const'. WebKit has been patched for successful build with 2.12.0+, but now the build fails with older libxml2 versions. CMake script should either detect which libxml2 version is installed and #ifdef the code accordingly, or make 2.12.0+ a hard dependency.

- - -

In file included from ../../WebCore/DerivedSources/unified-sources/UnifiedSource-42f7b70e-4.cpp:3:
../../../Source/WebCore/xml/XSLStyleSheetLibxslt.cpp: In member function 'bool WebCore::XSLStyleSheet::parseString(const WTF::String&)':
../../../Source/WebCore/xml/XSLStyleSheetLibxslt.cpp:139:129: error: invalid conversion from 'void (*)(void*, const xmlError*)' {aka 'void (*)(void*, const _xmlError*)'} to 'xmlStructuredErrorFunc' {aka 'void (*)(void*, _xmlError*)'} [-fpermissive]
  139 |     XMLDocumentParserScope scope(cachedResourceLoader(), XSLTProcessor::genericErrorFunc, XSLTProcessor::parseErrorFunc, console);
      |                                                                                                                                 ^
      |                                                                                                                                 |
      |                                                                                                                                 void (*)(void*, const xmlError*) {aka void (*)(void*, const _xmlError*)}

In file included from ../../../Source/WebCore/xml/XSLStyleSheetLibxslt.cpp:34:
../../../Source/WebCore/xml/parser/XMLDocumentParserScope.h:47:99: note:   initializing argument 3 of 'WebCore::XMLDocumentParserScope::XMLDocumentParserScope(WebCore::CachedResourceLoader*, xmlGenericErrorFunc, xmlStructuredErrorFunc, void*)'
   47 |         XMLDocumentParserScope(CachedResourceLoader*, xmlGenericErrorFunc, xmlStructuredErrorFunc structuredErrorFunc = 0, void* errorContext = nullptr);
      |                                                                            ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

In file included from ../../WebCore/DerivedSources/unified-sources/UnifiedSource-42f7b70e-4.cpp:6:
../../../Source/WebCore/xml/XSLTProcessorLibxslt.cpp: In function 'xmlDoc* WebCore::docLoaderFunc(const xmlChar*, xmlDictPtr, int, void*, xsltLoadType)':
../../../Source/WebCore/xml/XSLTProcessorLibxslt.cpp:135:34: error: invalid conversion from 'void (*)(void*, const xmlError*)' {aka 'void (*)(void*, const _xmlError*)'} to 'xmlStructuredErrorFunc' {aka 'void (*)(void*, _xmlError*)'} [-fpermissive]
  135 |         xmlSetStructuredErrorFunc(console, XSLTProcessor::parseErrorFunc);
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                  |
      |                                  void (*)(void*, const xmlError*) {aka void (*)(void*, const _xmlError*)}

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