fix concurrency_test build error on mac

paddle/fluid/framework/CMakeLists.txt

@@ -84,7 +84,7 @@ cc_library(lod_rank_table SRCS lod_rank_table.cc DEPS lod_tensor)
 cc_library(feed_fetch_method SRCS feed_fetch_method.cc DEPS lod_tensor scope glog)
 
 if(WITH_DISTRIBUTE)
-  cc_library(executor SRCS executor.cc DEPS op_registry device_context scope framework_proto glog lod_rank_table feed_fetch_method sendrecvop_grpc grpc++_unsecure grpc_unsecure gpr)
+  cc_library(executor SRCS executor.cc DEPS op_registry device_context scope framework_proto glog lod_rank_table feed_fetch_method sendrecvop_grpc cares grpc++_unsecure grpc_unsecure gpr)
   set(DISTRIBUTE_COMPILE_FLAGS "-Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor")
   set_source_files_properties(executor.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
 else()
@@ -109,6 +109,6 @@ cc_test(cow_ptr_tests SRCS details/cow_ptr_test.cc)
       
 # cc_test(channel_test SRCS channel_test.cc)
 cc_test(tuple_test SRCS tuple_test.cc )
-#cc_test(concurrency_test SRCS concurrency_test.cc DEPS go_op channel_close_op channel_create_op
-#        channel_send_op channel_recv_op sum_op select_op elementwise_add_op compare_op
-#        conditional_block_op while_op assign_op print_op executor proto_desc)
+cc_test(concurrency_test SRCS concurrency_test.cc DEPS go_op channel_close_op channel_create_op
+        channel_send_op channel_recv_op sum_op select_op elementwise_add_op compare_op
+        conditional_block_op while_op assign_op print_op executor proto_desc)