[doc] add FetchContent for CGraph

Author: ChunelFeng

CMakeLists.txt

@@ -15,10 +15,10 @@ project(CGraph VERSION 3.1.1)
 # CGraph默认使用C++11版本，推荐使用C++17版本。暂不支持C++11以下版本
 set(CMAKE_CXX_STANDARD 11)
 
-option(CGRAPH_BUILD_TUTORIAL "Enables builds of tutorials" ON)
-option(CGRAPH_BUILD_EXAMPLE "Enables builds of examples" ON)
-option(CGRAPH_BUILD_FUNCTIONAL_TESTS "Enables builds of functional tests" OFF)
-option(CGRAPH_BUILD_PERFORMANCE_TESTS "Enables builds of performance tests" OFF)
+option(CGRAPH_BUILD_TUTORIALS "Enable build tutorials" ON)
+option(CGRAPH_BUILD_EXAMPLES "Enable build examples" ON)
+option(CGRAPH_BUILD_FUNCTIONAL_TESTS "Enable build functional tests" OFF)
+option(CGRAPH_BUILD_PERFORMANCE_TESTS "Enable build performance tests" OFF)
 
 # 如果开启此宏定义，则CGraph执行过程中，不会在控制台打印任何信息
 # add_definitions(-D_CGRAPH_SILENCE_)
@@ -40,12 +40,17 @@ option(CGRAPH_BUILD_PERFORMANCE_TESTS "Enables builds of performance tests" OFF)
 # add CGraph environment info
 include(cmake/CGraph-env-include.cmake)
 
-if(CGRAPH_BUILD_TUTORIAL)
+# 教程相关内容
+if(CGRAPH_BUILD_TUTORIALS)
+    message(STATUS "[CGraph] build tutorials")
     add_subdirectory(./tutorial)
-endif(CGRAPH_BUILD_TUTORIAL)
-if(CGRAPH_BUILD_EXAMPLE)
+endif(CGRAPH_BUILD_TUTORIALS)
+
+# 样例相关内容
+if(CGRAPH_BUILD_EXAMPLES)
+    message(STATUS "[CGraph] build examples")
     add_subdirectory(./example)
-endif(CGRAPH_BUILD_EXAMPLE)
+endif(CGRAPH_BUILD_EXAMPLES)
 
 # 功能测试相关内容
 if(CGRAPH_BUILD_FUNCTIONAL_TESTS)

COMPILE.md

@@ -32,21 +32,6 @@
   $ ./tutorial/T00-HelloCGraph              # 运行 T00-HelloCGraph
   ```
 
-* 在项目中作为第三方库调用，使用FetchContent
-  ```cmake
-  Include(FetchContent)
-  FetchContent_Declare(
-    CGraph
-    GIT_REPOSITORY https://github.com/ChunelFeng/CGraph.git
-    GIT_TAG main
-    GIT_SHALLOW true
-  )
-  FetchContent_MakeAvailable(CGraph)
-
-  target_include_directories(${PROJECT_NAME} PRIVATE ${CGraph_SOURCE_DIR}/src)
-  target_link_libraries(${PROJECT_NAME} PRIVATE CGraph)
-  ```
-
 * Bazel编译方式(Linux/MacOS/Windows)
   ```shell
   $ git clone https://github.com/ChunelFeng/CGraph.git
@@ -72,6 +57,28 @@
 
 ---
 
+* 在其他使用 CMakeLists.txt 构建的项目中，通过 FetchContent 作为三方库引入
+  ```cmake
+  set(CGRAPH_BUILD_TUTORIAL OFF CACHE BOOL "" FORCE)
+  set(CGRAPH_BUILD_EXAMPLE OFF CACHE BOOL "" FORCE)
+  set(CGRAPH_BUILD_FUNCTIONAL_TESTS OFF CACHE BOOL "" FORCE)
+  set(CGRAPH_BUILD_PERFORMANCE_TESTS OFF CACHE BOOL "" FORCE)
+
+  Include(FetchContent)
+  FetchContent_Declare(
+    CGraph
+    GIT_REPOSITORY https://github.com/ChunelFeng/CGraph.git
+    GIT_TAG main
+    GIT_SHALLOW true
+  )
+
+  FetchContent_MakeAvailable(CGraph)
+  target_include_directories(${PROJECT_NAME} PRIVATE ${CGraph_SOURCE_DIR}/src)
+  target_link_libraries(${PROJECT_NAME} PRIVATE CGraph)
+  ```
+
+---
+
 ### Python 版本
 * MacOS 和 Windows 用户可以通过命令安装（推荐）
   ```shell