Fixed: Link to static libxml2 under Linux

--HG--
branch : develop

code/CMakeLists.txt

@@ -124,13 +124,17 @@ ENDIF(WITH_LIBXML2_ICONV)
 
 IF(WITH_STATIC)
   # libxml2 could need winsock2 library
-  SET(LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES} ${WINSOCK2_LIB})
+  IF(WINSOCK2_LIB)
+    SET(LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES} ${WINSOCK2_LIB})
+  ENDIF()
 
-  # on Mac OS X libxml2 requires iconv and liblzma
-  IF(APPLE)
-    FIND_PACKAGE(LibLZMA REQUIRED)
-    SET(LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES} ${LIBLZMA_LIBRARIES})
-  ENDIF(APPLE)
+  IF(UNIX)
+    # under Linux and OS X, recent libxml2 versions are linked against liblzma
+    FIND_PACKAGE(LibLZMA)
+    IF(LIBLZMA_LIBRARIES)
+      SET(LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES} ${LIBLZMA_LIBRARIES})
+    ENDIF()
+  ENDIF()
 ENDIF(WITH_STATIC)
 
 INCLUDE(${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules/PCHSupport.cmake)