diff --git a/CMakeLists.txt b/CMakeLists.txt
index a9c6062..7d352ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,6 @@ set(LIB_MINOR_VERSION 1)
 set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
 include(Version)
 
-#SET(CMAKE_C_COMPILER "/usr/bin/g++")
 set(CMAKE_MACOSX_RPATH 0)
 set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} -Wall)
 set(CMAKE_INSTALL_PREFIX /opt/MESA)
@@ -35,26 +34,21 @@ endif()
 
 include_directories(${PROJECT_SOURCE_DIR}/inc/)
 
-file(GLOB SRC
-    "src/*.c"
-    "src/*.cpp"
-)
-
 
 # Shared Library Output
-add_library(${lib_name}_shared SHARED ${SRC})
+add_library(${lib_name}_shared SHARED src/MESA_handle_logger.c)
 if(DEFINED MESA_SHARED_INSTALL_DIR)
 	set_target_properties(${lib_name}_shared PROPERTIES OUTPUT_NAME ${lib_name} LIBRARY_OUTPUT_DIRECTORY ${MESA_SHARED_INSTALL_DIR})
 else()
 	set_target_properties(${lib_name}_shared PROPERTIES OUTPUT_NAME ${lib_name})
 endif()
 
-set_target_properties(${lib_name}_shared PROPERTIES VERSION ${LIB_MAJOR_VERSION}.${LIB_MINOR_VERSION})
-set_target_properties(${lib_name}_shared PROPERTIES SOVERSION ${LIB_MAJOR_VERSION})
+#set_target_properties(${lib_name}_shared PROPERTIES VERSION ${LIB_MAJOR_VERSION}.${LIB_MINOR_VERSION})
+#set_target_properties(${lib_name}_shared PROPERTIES SOVERSION ${LIB_MAJOR_VERSION})
 
 
 # static Library Output
-add_library(${lib_name}_static STATIC ${SRC})
+add_library(${lib_name}_static STATIC src/MESA_handle_logger.c)
 set_target_properties(${lib_name}_static PROPERTIES OUTPUT_NAME ${lib_name})
 
 set(CMAKE_INSTALL_PREFIX /opt/MESA)
@@ -64,12 +58,7 @@ install(FILES inc/${lib_name}.h   DESTINATION ${CMAKE_INSTALL_PREFIX}/include/ME
 
 
 
-file(GLOB DEMO
-    "demo/*.c"
-    "demo/*.cpp"
-)
-
-add_executable(${lib_name}_demo ${DEMO})
+add_executable(${lib_name}_demo demo/test_handle_logger.c)
 target_link_libraries(${lib_name}_demo  rt pthread ${lib_name}_static)
 
 include(Package)
diff --git a/README b/README
index d933733..1d2d219 100644
--- a/README
+++ b/README
@@ -4,13 +4,16 @@
  *Author:yangwei@iie.ac.cn
  *History:
 		2014-03-24 created by yw
-		1)first version
+		1)第一个动态库版本
 		
 		2014-04-16 modified by yw
-		1)strict inspection parameters, compatible with g++ 4.4.4
+		1) 支持g++ 4.4.4编译
 		
 		2014-05-29 update by yw
-		1)create  directory is supported
+		1)支持创建用户指定的日志目录
+
+		2019-2-18 update by yw
+		1)性能优化，句柄中存储文件fp，定期flush至文件
 ------------------------------------------------------------------------------------- 		
  NOTICE:
 		1)compatible with g++, extern with c;