diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8dcb0ee4..b9b0d190 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -85,7 +85,7 @@ elseif (NANA_CMAKE_FIND_BOOST_FILESYSTEM OR NANA_CMAKE_BOOST_FILESYSTEM_FORCE)
       add_definitions(-DNANA_BOOST_FILESYSTEM_AVAILABLE)
 	  include_directories(SYSTEM "${Boost_INCLUDE_DIR}")
 	  #set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${Boost_LIBRARIES}")
-	  set(NANA_LINKS "${NANA_LINKS} ${Boost_LIBRARIES}")
+	  set(NANA_LINKS "${Boost_LIBRARIES}")    ######  FIRST !!!!!!!!!!!!!!!!!    add  ${NANA_LINKS} is not first
 	  #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${Boost_LIBRARIES}")
 	endif (Boost_FOUND)
 	
@@ -131,7 +131,7 @@ endif(WIN32)
 if(APPLE)
     add_definitions(-DAPPLE)
     include_directories(/opt/X11/include/)
-    set(NANA_LINKS "${NANA_LINKS}  -L/opt/X11/lib/  -liconv")
+    set(NANA_LINKS "${NANA_LINKS} -L/opt/X11/lib/ -liconv")
     #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -liconv")
     #set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L/opt/X11/lib/ -liconv")
     set(ENABLE_AUDIO OFF)