Add findZLIB in cmake

* Also fix a bug, we should link -ldl at last

CMakeLists.txt

@@ -14,7 +14,8 @@ find_package(CUDA QUIET)
 find_package(Protobuf REQUIRED)
 find_package(PythonLibs 2.7 REQUIRED)
 find_package(PythonInterp 2.7 REQUIRED)
-find_package(NumPy)
+find_package(ZLIB REQUIRED)
+find_package(NumPy REQUIRED)
 find_package(Threads REQUIRED)
 find_package(Glog)
 find_package(Gflags QUIET)

cmake/util.cmake

@@ -67,9 +67,9 @@ function(link_paddle_exe TARGET_NAME)
         ${PROTOBUF_LIBRARY}
         ${CMAKE_THREAD_LIBS_INIT}
         ${CBLAS_LIBS}
-        ${CMAKE_DL_LIBS}
+        ${ZLIB_LIBRARIES}
         ${INTERAL_LIBS}
-        -lz)
+        ${CMAKE_DL_LIBS})
     
     if(WITH_PYTHON)
         target_link_libraries(${TARGET_NAME}