Fix the lack of linking libraries to libpaddle_capi_engine. (#5343)

The engine library need to link paddle_pserver and paddle_network on linux.

paddle/capi/CMakeLists.txt

@@ -29,32 +29,32 @@ add_style_check_target(paddle_capi ${CAPI_SOURCES} ${CAPI_HEADER}
 add_dependencies(paddle_capi paddle_proto)
 
 # TODO: paddle_capi_whole will be removed.
+set(PADDLE_CAPI_LAYERS_LIBS
+    paddle_function
+    paddle_gserver)
 if(MOBILE_INFERENCE)
-    set(PADDLE_CAPI_INFER_LIBS
-        paddle_utils
-        paddle_parameter
-        paddle_math
-        paddle_cuda
-        paddle_function
-        paddle_gserver
-        paddle_proto)
+  set(PADDLE_CAPI_ENGINE_LIBS
+      paddle_utils
+      paddle_parameter
+      paddle_math
+      paddle_cuda
+      paddle_proto)
 else()
-    set(PADDLE_CAPI_INFER_LIBS
-        paddle_utils
-        paddle_parameter
-        paddle_math
-        paddle_cuda
-        paddle_function
-        paddle_gserver
-        paddle_proto
-        paddle_pserver
-        paddle_network)
+  set(PADDLE_CAPI_ENGINE_LIBS
+      paddle_utils
+      paddle_parameter
+      paddle_math
+      paddle_cuda
+      paddle_proto
+      paddle_pserver
+      paddle_network)
 endif()
+set(PADDLE_CAPI_INFER_LIBS ${PADDLE_CAPI_LAYERS_LIBS} ${PADDLE_CAPI_ENGINE_LIBS})
 cc_library(paddle_capi_whole DEPS paddle_capi ${PADDLE_CAPI_INFER_LIBS})
 
 # Link the static library for inference
-cc_library(paddle_capi_engine DEPS paddle_capi paddle_utils paddle_parameter paddle_math paddle_cuda paddle_proto)
-cc_library(paddle_capi_layers DEPS paddle_function paddle_gserver)
+cc_library(paddle_capi_engine DEPS paddle_capi ${PADDLE_CAPI_ENGINE_LIBS})
+cc_library(paddle_capi_layers DEPS ${PADDLE_CAPI_LAYERS_LIBS})
 
 # Link the shared library for inference
 if(NOT IOS)

python/paddle/utils/merge_model.py

@@ -23,32 +23,32 @@ from paddle.v2.topology import Topology
 
 
 def merge_v2_model(net, param_file, output_file):
-    '''Integrate the model config and model parameters into one file.
-    
+    '''Merge the model config and parameters into one file.
+
     The model configuration file describes the model structure which
     ends with .py. The parameters file stores the parameters of the model
     which ends with .tar.gz.
-    
-    @param  net            The output layer of the network.
-    @param  param_file     Path of the model parameters(.tar.gz) which is stored by v2 api.
+
+    @param  net            The output layer of the network for inference.
+    @param  param_file     Path of the parameters (.tar.gz) which is stored by v2 api.
     @param  output_file    Path of the merged file which will be generated.
-    
+
     Usage:
 
-        from paddle.util.merge_model import merge_v2_model
+        from paddle.utils.merge_model import merge_v2_model
         # import your network configuration
-        from mobilenet import mobile_net
-        
-        net = mobile_net(3*224*224, 102)
+        from example_net import net_conf
+
+        net = net_conf(is_predict=True)
         param_file = './param_pass_00000.tar.gz'
         output_file = './output.paddle'
-        
+
         merge_v2_model(net, param_file, output_file)
 
     '''
 
     assert isinstance(net, LayerOutput), \
-            "The net should be the output of the network"
+            "The net should be the output of the network for inference"
     assert os.path.exists(param_file), \
             "The model parameters file %s does not exists " % (param_file)