Fix bug

paddle/framework/op_registry.h

@@ -307,7 +307,10 @@ class OpRegistry {
   }
 };
 
-class Registrar {};
+class Registrar {
+ public:
+  void Touch() {}
+};
 
 template <typename OpType, typename ProtoMakerType>
 class OpRegistrar : public Registrar {
@@ -351,9 +354,10 @@ class OpKernelRegistrar : public Registrar {
 #define REGISTER_OP(op_type, op_class, op_maker_class)                        \
   STATIC_ASSERT_GLOBAL_NAMESPACE(                                             \
       __reg_op__##op_type, "REGISTER_OP must be called in global namespace"); \
-  int TouchOpRegistrar_##op_type() {                                          \
   static ::paddle::framework::OpRegistrar<op_class, op_maker_class>           \
       __op_registrar_##op_type##__(#op_type);                                 \
+  int TouchOpRegistrar_##op_type() {                                          \
+    __op_registrar_##op_type##__.Touch();                                     \
     return 0;                                                                 \
   }
 
@@ -364,10 +368,11 @@ class OpKernelRegistrar : public Registrar {
   STATIC_ASSERT_GLOBAL_NAMESPACE(                                            \
       __reg_gradient_op__##op_type##_##grad_op_type,                         \
       "REGISTER_GRADIENT_OP must be called in global namespace");            \
-  int TouchOpGradientRegistrar_##op_type() {                                   \
   static ::paddle::framework::GradOpRegistrar<grad_op_class>                 \
       __op_gradient_registrar_##op_type##_##grad_op_type##__(#op_type,       \
                                                              #grad_op_type); \
+  int TouchOpGradientRegistrar_##op_type() {                                 \
+    __op_gradient_registrar_##op_type##_##grad_op_type##__.Touch();          \
     return 0;                                                                \
   }
 
@@ -378,9 +383,10 @@ class OpKernelRegistrar : public Registrar {
   STATIC_ASSERT_GLOBAL_NAMESPACE(                                         \
       __reg_op_kernel_##op_type##_##DEVICE_TYPE##__,                      \
       "REGISTER_OP_KERNEL must be called in global namespace");           \
-  int TouchOpKernelRegistrar_##op_type##_##DEVICE_TYPE() {                  \
   static ::paddle::framework::OpKernelRegistrar<place_class, __VA_ARGS__> \
       __op_kernel_registrar_##op_type##_##DEVICE_TYPE##__(#op_type);      \
+  int TouchOpKernelRegistrar_##op_type##_##DEVICE_TYPE() {                \
+    __op_kernel_registrar_##op_type##_##DEVICE_TYPE##__.Touch();          \
     return 0;                                                             \
   }
 
@@ -436,6 +442,8 @@ class OpKernelRegistrar : public Registrar {
       __attribute__((unused)) =                                  \
           TouchOpKernelRegistrar_##op_type##_##DEVICE_TYPE()
 
+// TODO(jiayi): The following macros seems ugly, do we have better method?
+
 #ifdef PADDLE_ONLY_CPU
 #define USE_OP_KERNEL(op_type) USE_OP_DEVICE_KERNEL(op_type, CPU)
 #else