From 0e9afe968a0ca9bd79868168a939950e156c441d Mon Sep 17 00:00:00 2001
From: Andreas Gravgaard Andersen <andreasga22@gmail.com>
Date: Tue, 28 Sep 2021 09:09:08 +0200
Subject: [PATCH] ENH: re-apply ITK symbol export definitions

BUG: avoid redefining definition
---
 Modules/ThirdParty/Expat/src/expat/expat.h          | 12 ++++++++++++
 Modules/ThirdParty/Expat/src/expat/expat_external.h |  2 --
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/Modules/ThirdParty/Expat/src/expat/expat.h b/Modules/ThirdParty/Expat/src/expat/expat.h
index b7d6d354801..574f1bea803 100644
--- a/Modules/ThirdParty/Expat/src/expat/expat.h
+++ b/Modules/ThirdParty/Expat/src/expat/expat.h
@@ -43,6 +43,18 @@
 #include <stdlib.h>
 #include "expat_external.h"
 
+#include "expatDllConfig.h"
+
+#if defined(_WIN32) && !defined(ITK_EXPAT_STATIC)
+#  if defined(ITKEXPAT_EXPORTS)
+#    define XMLPARSEAPI(type) __declspec( dllexport ) type __cdecl
+#  else
+#    define XMLPARSEAPI(type) __declspec( dllimport ) type __cdecl
+#  endif
+#else
+#  define XMLPARSEAPI(type) type
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/Modules/ThirdParty/Expat/src/expat/expat_external.h b/Modules/ThirdParty/Expat/src/expat/expat_external.h
index 8829f770910..851e1d5008a 100644
--- a/Modules/ThirdParty/Expat/src/expat/expat_external.h
+++ b/Modules/ThirdParty/Expat/src/expat/expat_external.h
@@ -122,8 +122,6 @@
 #  define XML_ATTR_ALLOC_SIZE(x)
 #endif
 
-#define XMLPARSEAPI(type) XMLIMPORT type XMLCALL
-
 #ifdef __cplusplus
 extern "C" {
 #endif