diff --git a/cpp/README.md b/cpp/README.md
index e69de29bb2..cdb01de4a9 100644
--- a/cpp/README.md
+++ b/cpp/README.md
@@ -0,0 +1,10 @@
+# Compilation
+##### Step 1, build the third_party library:
+./third_party/build.sh
+
+##### step2, build vecwise engine:
+mkdir build && cd build && cmake .. && make -j
+
+##### step3, get the library and server:
+build/src/vecwise_engine_server is the server
+build/src/libvecwise_engine.a is the static library
\ No newline at end of file
diff --git a/cpp/src/CMakeLists.txt b/cpp/src/CMakeLists.txt
index 8dcff3def4..3ab957c9dd 100644
--- a/cpp/src/CMakeLists.txt
+++ b/cpp/src/CMakeLists.txt
@@ -14,7 +14,7 @@ set(vecwise_engine_src
         ${cache_files}
         )
 
-add_library(vecwise_engine SHARED ${vecwise_engine_src})
+add_library(vecwise_engine STATIC ${vecwise_engine_src})
 
 add_executable(vecwise_engine_server
         ${config_files}