LibXML: Enable EXPLICIT_SYMBOL_EXPORT

Author: https://github.com/ayeteadoe
Commit: 2c91014bbf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5769
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/R-Goc

Libraries/LibXML/CMakeLists.txt

@@ -3,4 +3,4 @@ set(SOURCES
     DOM/Node.cpp
 )
 
-ladybird_lib(LibXML xml)
+ladybird_lib(LibXML xml EXPLICIT_SYMBOL_EXPORT)

Libraries/LibXML/Parser/Parser.h

@@ -17,6 +17,7 @@
 #include <LibXML/DOM/Document.h>
 #include <LibXML/DOM/DocumentTypeDeclaration.h>
 #include <LibXML/DOM/Node.h>
+#include <LibXML/Export.h>
 #include <LibXML/Forward.h>
 
 namespace XML {
@@ -46,7 +47,7 @@ struct Listener {
     virtual void error(ParseError const&) { }
 };
 
-class Parser {
+class XML_API Parser {
 public:
     struct Options {
         bool preserve_cdata { true };