fpdfsdk/ differences with XFA (for didactic purposes only).

fpdfsdk/src/fpdf_ext.cpp

Index: fpdfsdk/src/fpdf_ext.cpp
diff --git a/fpdfsdk/src/fpdf_ext.cpp b/fpdfsdk/src/fpdf_ext.cpp
index d9f8624249107887176c5240d4a8e793bba66263..910c2c771777bd8ef0b7a453b3c0a56b2656025c 100644
--- a/fpdfsdk/src/fpdf_ext.cpp
+++ b/fpdfsdk/src/fpdf_ext.cpp
@@ -6,6 +6,9 @@
 
 #include "public/fpdf_ext.h"
 
+#ifdef PDF_ENABLE_XFA
+#include "../include/fpdfxfa/fpdfxfa_doc.h"
+#endif
 #include "core/include/fxcrt/fx_xml.h"
 #include "fpdfsdk/include/fsdk_define.h"
 
@@ -174,6 +177,7 @@ void CheckUnSupportError(CPDF_Document* pDoc, FX_DWORD err_code) {
   const CXML_Element* pElement = metaData.GetRoot();
   if (pElement)
     CheckSharedForm(pElement, "workflowType");
+#ifndef PDF_ENABLE_XFA
 
   // XFA Forms
   CPDF_InterForm* pInterForm = new CPDF_InterForm(pDoc, FALSE);
@@ -181,6 +185,7 @@ void CheckUnSupportError(CPDF_Document* pDoc, FX_DWORD err_code) {
     FPDF_UnSupportError(FPDF_UNSP_DOC_XFAFORM);
   }
   delete pInterForm;
+#endif
 }
 
 DLLEXPORT int FPDFDoc_GetPageMode(FPDF_DOCUMENT document) {