Fix reporting of FieldML dependencies i.e. XML2 to parent scope.

Fix by hsor001. Needed to build zinc and cmgui on windows.
https://tracker.physiomeproject.org/show_bug.cgi?id=3502

Author: rchristie

CMakeLists.txt

@@ -124,7 +124,7 @@ IF( ${FIELDML_NAMESPACE_NAME}_INSTALL_CONFIG )
 		"\nGET_FILENAME_COMPONENT( ${FIELDML_NAMESPACE_NAME}_INCLUDE_DIRS \"\${SELF_DIR}/../../include\" ABSOLUTE )"
 		"\nSET( ${FIELDML_NAMESPACE_NAME}_INCLUDE_DIRS \"\${${FIELDML_NAMESPACE_NAME}_INCLUDE_DIRS}\" \"${LIBXML2_INCLUDE_DIR}\" \"${HDF5_INCLUDE_DIRS}\" \"${MPI_INCLUDE_DIRS}\" )"
 		"\nSET( ${FIELDML_NAMESPACE_NAME}_LIBRARIES ${FIELDML_API_LIBRARY_TARGET_NAME} ${FIELDML_IO_API_LIBRARY_TARGET_NAME} ${HDF5_MINE_LIBRARIES} ${MPI_MINE_LIBRARIES})"
-		"\nSET( ${FIELDML_NAMESPACE_NAME}_DEFINITIONS )"
+		"\nSET( ${FIELDML_NAMESPACE_NAME}_DEFINITIONS ${LIBXML2_DEFINITIONS} )"
 		"\nSET( ${FIELDML_NAMESPACE_NAME}_FOUND TRUE )" 
 		"\nENDIF( NOT DEFINED _${FIELDML_NAMESPACE_NAME}_CONFIG_CMAKE )" 
 		"\n" )

core/CMakeLists.txt

@@ -98,6 +98,10 @@ ENDIF( "${CMAKE_BUILD_TYPE}" STREQUAL "Debug" )
 IF( WIN32 )
 	ADD_DEFINITIONS( -D_CRT_SECURE_NO_WARNINGS )
 ENDIF( WIN32 )
+FOREACH( DEF ${LIBXML2_DEFINITIONS} )
+  ADD_DEFINITIONS( -D${DEF} )
+ENDFOREACH( DEF ${LIBXML2_DEFINITIONS} )
+SET( LIBXML2_DEFINITIONS ${LIBXML2_DEFINITIONS} PARENT_SCOPE )
 SET(LIBXML2_INCLUDE_DIRS ${LIBXML2_INCLUDE_DIR})
 INCLUDE_DIRECTORIES( ${LIBXML2_INCLUDE_DIR} )
 

io/CMakeLists.txt

@@ -91,7 +91,6 @@ IF( FIELDML_USE_HDF5 )
 ENDIF( FIELDML_USE_HDF5 )
 
 SET( CMAKE_PREFIX_PATH ${CMAKE_INSTALL_PREFIX} )
-FIND_PACKAGE( LibXml2 REQUIRED )
 
 SET( FIELDML_IO_API_SRCS
 	src/ArrayDataReader.cpp