diff --git a/CMakeLists.txt b/CMakeLists.txt
index 007f1f18bb655e10c45bc7e21a299861eb204dd2..99c6c0d373052fa1be528ebb82c3d2f248e64bb0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,6 +14,7 @@ find_package(CUDA QUIET)
 find_package(Protobuf REQUIRED)
 find_package(PythonLibs 2.7 REQUIRED)
 find_package(PythonInterp 2.7 REQUIRED)
+find_package(ZLIB REQUIRED)
 find_package(NumPy)
 find_package(Threads REQUIRED)
 find_package(Glog)
diff --git a/cmake/flags.cmake b/cmake/flags.cmake
index c95d4063105e74df7acd491558f399dff6a8e0a8..4b99e7f7fb6af3ca85d6dc642a4aea07e64c7049 100644
--- a/cmake/flags.cmake
+++ b/cmake/flags.cmake
@@ -58,8 +58,8 @@ set(COMMON_FLAGS
     -fPIC
     -fno-omit-frame-pointer
     -Wall
-#    -Wextra
-#    -Werror
+    -Wextra
+    -Werror
     -Wnon-virtual-dtor
     -Wdelete-non-virtual-dtor
     -Wno-unused-parameter
diff --git a/cmake/util.cmake b/cmake/util.cmake
index f3227d27c53c24e0e2e6a68eccecb188b1f1c14d..a91e1d56430144bb88072936989d83cd619e5771 100644
--- a/cmake/util.cmake
+++ b/cmake/util.cmake
@@ -1,19 +1,3 @@
-# MAC OS does not contain start-up and whole-archive args
-if(APPLE)
-    set(GROUP_START "")
-    set(GROUP_END "")
-
-    set(ARCHIVE_START "")
-    set(ARCHIVE_END "")
-else()
-    set(GROUP_START "-Wl,--start-group")
-    set(GROUP_END "-Wl,--end-group")
-
-    set(ARCHIVE_START "-Wl,--whole-archive")
-    set(ARCHIVE_END "-Wl,--no-whole-archive")
-endif()
-
-
 # Some common routine for paddle compile.
 
 # target_circle_link_libraries
@@ -23,17 +7,46 @@ endif()
 # Rest Arguments: libraries which link together.
 function(target_circle_link_libraries TARGET_NAME)
     if(APPLE)
+        set(LIBS)
+        set(inArchive OFF)
+        set(libsInArgn)
+
         foreach(arg ${ARGN})
-            list(APPEND OSX_LIBRARIES "-Wl,-force_load" "${arg}")
+            if(${arg} STREQUAL "ARCHIVE_START")
+                set(inArchive ON)
+            elseif(${arg} STREQUAL "ARCHIVE_END")
+                set(inArchive OFF)
+            else()
+                if(inArchive)
+                    list(APPEND LIBS "-Wl,-force_load")
+                endif()
+                list(APPEND LIBS ${arg})
+                list(APPEND libsInArgn ${arg})
+            endif()
         endforeach()
+
+        list(REVERSE libsInArgn)
         target_link_libraries(${TARGET_NAME}
-                ${OSX_LIBRARIES} -lz)
-    else()
+            ${LIBS}
+            ${libsInArgn})
+
+    else()  # LINUX
+        set(LIBS)
+
+        foreach(arg ${ARGN})
+            if(${arg} STREQUAL "ARCHIVE_START")
+                list(APPEND LIBS "-Wl,--whole-archive")
+            elseif(${arg} STREQUAL "ARCHIVE_END")
+                list(APPEND LIBS "-Wl,--no-whole-archive")
+            else()
+                list(APPEND LIBS ${arg})
+            endif()
+        endforeach()
+
         target_link_libraries(${TARGET_NAME}
-                ${GROUP_START}
-                ${ARGN}
-                -lz
-                ${GROUP_END})
+                "-Wl,--start-group"
+                ${LIBS}
+                "-Wl,--end-group")
     endif()
 endfunction()
 
@@ -65,20 +78,20 @@ function(link_paddle_exe TARGET_NAME)
     if(PADDLE_WITH_INTERNAL)
         set(INTERAL_LIBS paddle_internal_gserver paddle_internal_parameter)
         target_circle_link_libraries(${TARGET_NAME}
-            ${ARCHIVE_START}
+            ARCHIVE_START
             paddle_internal_gserver
             paddle_internal_owlqn
-            ${ARCHIVE_END}
+            ARCHIVE_END
             paddle_internal_parameter)
     else()
         set(INTERAL_LIBS "")
     endif()
 
     target_circle_link_libraries(${TARGET_NAME}
-        ${ARCHIVE_START}
+        ARCHIVE_START
         paddle_gserver
         ${METRIC_LIBS}
-        ${ARCHIVE_END}
+        ARCHIVE_END
         paddle_pserver
         paddle_trainer_lib
         paddle_network
@@ -92,7 +105,8 @@ function(link_paddle_exe TARGET_NAME)
         ${CMAKE_THREAD_LIBS_INIT}
         ${CBLAS_LIBS}
         ${CMAKE_DL_LIBS}
-        ${INTERAL_LIBS})
+        ${INTERAL_LIBS}
+        ${ZLIB_LIBRARIES})
     
     if(WITH_PYTHON)
         target_link_libraries(${TARGET_NAME}