diff --git a/contrib/libxml2 b/contrib/libxml2
index 8292f361458..223cb03a5d2 160000
--- a/contrib/libxml2
+++ b/contrib/libxml2
@@ -1 +1 @@
-Subproject commit 8292f361458fcffe0bff515a385be02e9d35582c
+Subproject commit 223cb03a5d27b1b2393b266a8657443d046139d6
diff --git a/contrib/libxml2-cmake/linux_x86_64/include/libxml/xmlversion.h b/contrib/libxml2-cmake/linux_x86_64/include/libxml/xmlversion.h
index d8535e91a0e..c2faeb47cb1 100644
--- a/contrib/libxml2-cmake/linux_x86_64/include/libxml/xmlversion.h
+++ b/contrib/libxml2-cmake/linux_x86_64/include/libxml/xmlversion.h
@@ -21,7 +21,7 @@ extern "C" {
  * your library and includes mismatch
  */
 #ifndef LIBXML2_COMPILING_MSCCDEF
-XMLPUBFUN void xmlCheckVersion(int version);
+XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
 #endif /* LIBXML2_COMPILING_MSCCDEF */
 
 /**
@@ -29,28 +29,28 @@ XMLPUBFUN void xmlCheckVersion(int version);
  *
  * the version string like "1.2.3"
  */
-#define LIBXML_DOTTED_VERSION "2.12.4"
+#define LIBXML_DOTTED_VERSION "2.10.3"
 
 /**
  * LIBXML_VERSION:
  *
  * the version number: 1.2.3 value is 10203
  */
-#define LIBXML_VERSION 21204
+#define LIBXML_VERSION 21003
 
 /**
  * LIBXML_VERSION_STRING:
  *
  * the version number string, 1.2.3 value is "10203"
  */
-#define LIBXML_VERSION_STRING "21204"
+#define LIBXML_VERSION_STRING "21003"
 
 /**
  * LIBXML_VERSION_EXTRA:
  *
  * extra version information, used to show a git commit description
  */
-#define LIBXML_VERSION_EXTRA "-GITv2.12.4"
+#define LIBXML_VERSION_EXTRA ""
 
 /**
  * LIBXML_TEST_VERSION:
@@ -58,7 +58,7 @@ XMLPUBFUN void xmlCheckVersion(int version);
  * Macro to check that the libxml version in use is compatible with
  * the version the software has been compiled against
  */
-#define LIBXML_TEST_VERSION xmlCheckVersion(21204);
+#define LIBXML_TEST_VERSION xmlCheckVersion(21003);
 
 #ifndef VMS
 #if 0
@@ -270,7 +270,7 @@ XMLPUBFUN void xmlCheckVersion(int version);
  *
  * Whether iconv support is available
  */
-#if 1
+#if 0
 #define LIBXML_ICONV_ENABLED
 #endif
 
@@ -313,7 +313,7 @@ XMLPUBFUN void xmlCheckVersion(int version);
 /**
  * LIBXML_DEBUG_RUNTIME:
  *
- * Removed
+ * Whether the runtime debugging is configured in
  */
 #if 0
 #define LIBXML_DEBUG_RUNTIME
@@ -409,7 +409,12 @@ XMLPUBFUN void xmlCheckVersion(int version);
 #endif
 
 #ifdef __GNUC__
-/** DOC_DISABLE */
+
+/**
+ * ATTRIBUTE_UNUSED:
+ *
+ * Macro used to signal to GCC unused function parameters
+ */
 
 #ifndef ATTRIBUTE_UNUSED
 # if ((__GNUC__ > 2) || ((__GNUC__ == 2) && (__GNUC_MINOR__ >= 7)))
@@ -419,6 +424,12 @@ XMLPUBFUN void xmlCheckVersion(int version);
 # endif
 #endif
 
+/**
+ * LIBXML_ATTR_ALLOC_SIZE:
+ *
+ * Macro used to indicate to GCC this is an allocator function
+ */
+
 #ifndef LIBXML_ATTR_ALLOC_SIZE
 # if (!defined(__clang__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 3))))
 #  define LIBXML_ATTR_ALLOC_SIZE(x) __attribute__((alloc_size(x)))
@@ -429,6 +440,12 @@ XMLPUBFUN void xmlCheckVersion(int version);
 # define LIBXML_ATTR_ALLOC_SIZE(x)
 #endif
 
+/**
+ * LIBXML_ATTR_FORMAT:
+ *
+ * Macro used to indicate to GCC the parameter are printf like
+ */
+
 #ifndef LIBXML_ATTR_FORMAT
 # if ((__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)))
 #  define LIBXML_ATTR_FORMAT(fmt,args) __attribute__((__format__(__printf__,fmt,args)))
@@ -440,69 +457,44 @@ XMLPUBFUN void xmlCheckVersion(int version);
 #endif
 
 #ifndef XML_DEPRECATED
-#  if defined (IN_LIBXML) || (__GNUC__ * 100 + __GNUC_MINOR__ < 301)
+#  ifdef IN_LIBXML
 #    define XML_DEPRECATED
-/* Available since at least GCC 3.1 */
 #  else
+/* Available since at least GCC 3.1 */
 #    define XML_DEPRECATED __attribute__((deprecated))
 #  endif
 #endif
 
-#if defined(__clang__) || (__GNUC__ * 100 + __GNUC_MINOR__ >= 406)
-  #if defined(__clang__) || (__GNUC__ * 100 + __GNUC_MINOR__ >= 800)
-    #define XML_IGNORE_FPTR_CAST_WARNINGS \
-      _Pragma("GCC diagnostic push") \
-      _Pragma("GCC diagnostic ignored \"-Wpedantic\"") \
-      _Pragma("GCC diagnostic ignored \"-Wcast-function-type\"")
-  #else
-    #define XML_IGNORE_FPTR_CAST_WARNINGS \
-      _Pragma("GCC diagnostic push") \
-      _Pragma("GCC diagnostic ignored \"-Wpedantic\"")
-  #endif
-  #define XML_POP_WARNINGS \
-    _Pragma("GCC diagnostic pop")
-#else
-  #define XML_IGNORE_FPTR_CAST_WARNINGS
-  #define XML_POP_WARNINGS
-#endif
-
 #else /* ! __GNUC__ */
+/**
+ * ATTRIBUTE_UNUSED:
+ *
+ * Macro used to signal to GCC unused function parameters
+ */
 #define ATTRIBUTE_UNUSED
+/**
+ * LIBXML_ATTR_ALLOC_SIZE:
+ *
+ * Macro used to indicate to GCC this is an allocator function
+ */
 #define LIBXML_ATTR_ALLOC_SIZE(x)
+/**
+ * LIBXML_ATTR_FORMAT:
+ *
+ * Macro used to indicate to GCC the parameter are printf like
+ */
 #define LIBXML_ATTR_FORMAT(fmt,args)
+/**
+ * XML_DEPRECATED:
+ *
+ * Macro used to indicate that a function, variable, type or struct member
+ * is deprecated.
+ */
 #ifndef XML_DEPRECATED
-#  if defined (IN_LIBXML) || !defined (_MSC_VER)
-#    define XML_DEPRECATED
-/* Available since Visual Studio 2005 */
-#  elif defined (_MSC_VER) && (_MSC_VER >= 1400)
-#    define XML_DEPRECATED __declspec(deprecated)
-#  endif
-#endif
-#if defined (_MSC_VER) && (_MSC_VER >= 1400)
-#  define XML_IGNORE_FPTR_CAST_WARNINGS __pragma(warning(push))
-#else
-#  define XML_IGNORE_FPTR_CAST_WARNINGS
-#endif
-#ifndef XML_POP_WARNINGS
-#  if defined (_MSC_VER) && (_MSC_VER >= 1400)
-#    define XML_POP_WARNINGS __pragma(warning(pop))
-#  else
-#    define XML_POP_WARNINGS
-#  endif
+#define XML_DEPRECATED
 #endif
 #endif /* __GNUC__ */
 
-#define XML_NO_ATTR
-
-#ifdef LIBXML_THREAD_ENABLED
-  #define XML_DECLARE_GLOBAL(name, type, attrs) \
-    attrs XMLPUBFUN type *__##name(void);
-  #define XML_GLOBAL_MACRO(name) (*__##name())
-#else
-  #define XML_DECLARE_GLOBAL(name, type, attrs) \
-    attrs XMLPUBVAR type name;
-#endif
-
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */