Taken from manaverse fork:
https://git.themanaworld.org/mana/verse/-/commit/b727a394d19f79363af296d5ff773cda36a2056e

--- manaplus-2.1.3.17/src/unittests/utils/dumplibs.cc
+++ manaplus-2.1.3.17/src/unittests/utils/dumplibs.cc
@@ -57,7 +57,12 @@
 #ifdef ENABLE_LIBXML
     SECTION("libxml2")
     {
-        const char **xmlVersion = __xmlParserVersion();
+        const char *const *xmlVersion
+#if LIBXML_VERSION > 21200
+            = &xmlParserVersion;
+#else
+            = __xmlParserVersion();
+#endif
         REQUIRE(xmlVersion != nullptr);
         REQUIRE(*xmlVersion != nullptr);
         REQUIRE(std::string(*xmlVersion) ==
--- manaplus-2.1.3.17/src/utils/dumplibs.cpp
+++ manaplus-2.1.3.17/src/utils/dumplibs.cpp
@@ -140,7 +140,13 @@
     LIBXML_TEST_VERSION
 #endif  // LIBXML_TEST_VERSION
 #ifdef ENABLE_LIBXML
-    const char * const *xmlVersion = __xmlParserVersion();
+    const char *const *xmlVersion
+#if LIBXML_VERSION > 21200
+        = &xmlParserVersion;
+#else
+        = __xmlParserVersion();
+#endif
+
     if (xmlVersion != nullptr)
         logger->log(" libxml2: %s", *xmlVersion);
 #endif  // ENABLE_LIBXML