118 lines
4.2 KiB
Markdown
118 lines
4.2 KiB
Markdown
# 1. CMake构建工具使用
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  SDK使用CMake工具构建。
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## 1.1. 安装
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```code
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详见：//tools/cmake/Makefile
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$ cd tools/cmake
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$ make
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$ cmake --version
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cmake version 3.27.4
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```
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## 1.2. SDK构建配置脚本
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* build目录下是基本的配置脚本。
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```code
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build/
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├── cmake
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│ ├── Makefile // 调用cmake命令生成Makefile文件；
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│ └── toolchain
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│ └── linux.toolchain.cmake // 工具链配置文件已经一些全局变量；
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├── global_config.cmake // 配置文件
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└── sdk_config.cmake // 配置文件
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```
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### 1.2.1. //build/cmake/Makefile
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  调用cmake命令生成Makefile文件。
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```code
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all:
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@mkdir -p ../../cmake-shell;\
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cd ../../cmake-shell;\
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pwd;\
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# 调用cmake命令，并指定工具链配置文件，生成Makefile文件。
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cmake -DCMAKE_TOOLCHAIN_FILE="./build/cmake/toolchain/linux.toolchain.cmake" ..;\
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cd ..
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clean:
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rm -rf ../../cmake-shell
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```
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### 1.2.2. //build/cmake/toolchain/linux.toolchain.cmake
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  工具链配置文件或者一些跨平台差异化的配置文件。该文件在//build/cmake/Makefile中被指定，当需要交叉编译时，此文件的变量需要被重新配置。
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```code
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INCLUDE(CMakeForceCompiler)
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set(LINUX_TEST "true")
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set(CROSS_COMPILE_PREFIX "") // 工具链前缀
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set(CMAKE_C_COMPILER "${CROSS_COMPILE_PREFIX}gcc") // 配置工具链
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set(CMAKE_CXX_COMPILER "${CROSS_COMPILE_PREFIX}g++") // 配置工具链
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# path to compiler and utilities
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set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
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set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
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# Name of the target platform
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set(CMAKE_SYSTEM_NAME Linux)
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set(CMAKE_SYSTEM_PROCESSOR arm)
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# Version of the system
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set(CMAKE_SYSTEM_VERSION 1)
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cmake_policy(SET CMP0011 NEW)
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cmake_policy(SET CMP0005 NEW)
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add_definitions(-Wall -O2 -Os)
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add_definitions(-Wno-unused-local-typedefs)
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add_definitions(-Wstrict-aliasing -Wwrite-strings)
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set(TOOLCHAIN_NAME arm-linux-gnueabihf)
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set(TARGET_PLATFORM "linux") // 编译系统平台，Linux表示在PC的ubuntu系统上编译
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set(SUBMODULE_PATH_OF_IPC_SDK "") // 子仓库路面，此处为空，交叉编译时设置
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set(PLATFORM_PATH "${CMAKE_CURRENT_SOURCE_DIR}") // 平台路径
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set(TEST_COVERAGE "true") // 覆盖率报告开关
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add_definitions(-DPLATFORM_PATH=\"${PLATFORM_PATH}\") // 定义一个宏
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set(PROJECT_OUTPUT_FOLDER "output_files") // 编译的目标文件输出目录
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set(CMAKE_INSTALL_PREFIX "${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_OUTPUT_FOLDER}")
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... // 此处省略不同模块的配置参数，一般是一些宏定义；
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```
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### 1.2.3. //CMakeLists.txt
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  SDK跟目录下的第一个CMakeLists.txt文件，cmake命令执行的时候会指定根目录，到此目录下寻找CMakeLists.txt文件作为整个项目的构建起点。
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## 1.3. 重要的配置
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### 1.3.1. 目录设置
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  目录结构都是通过.cmake脚本来配置的。
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#### 1.3.1.1. 源码目录结构配置
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详见：//build/global_config.cmake
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```code
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set(EXEC_OUTPUT_PATH "${PLATFORM_PATH}/${PROJECT_OUTPUT_FOLDER}/bin")
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set(LIBS_OUTPUT_PATH "${PLATFORM_PATH}/${PROJECT_OUTPUT_FOLDER}/libs")
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set(TEST_TOOLS_OUTPUT_PATH "${PLATFORM_PATH}/${PROJECT_OUTPUT_FOLDER}/libs/test_tools")
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set(EXTERNAL_LIBS_OUTPUT_PATH "${PLATFORM_PATH}/${PROJECT_OUTPUT_FOLDER}/libs/external")
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set(TEST_OUTPUT_PATH "${PLATFORM_PATH}/${PROJECT_OUTPUT_FOLDER}/test")
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set(PROJECT_ROOT_PATH "${PLATFORM_PATH}")
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set(APPLICATION_SOURCE_PATH "${CMAKE_SOURCE_DIR_IPCSDK}/application") # 应用层目录
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set(MIDDLEWARE_SOURCE_PATH "${CMAKE_SOURCE_DIR_IPCSDK}/middleware") # 中间件层目录
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set(UTILS_SOURCE_PATH "${CMAKE_SOURCE_DIR_IPCSDK}/utils") # 工具层目录
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set(HAL_SOURCE_PATH "${CMAKE_SOURCE_DIR_IPCSDK}/hal") # 硬件抽象层目录
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set(TEST_SOURCE_PATH "${CMAKE_SOURCE_DIR_IPCSDK}/test") # 自动化测试代码/example目录
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set(EXTERNAL_SOURCE_PATH "${CMAKE_SOURCE_DIR_IPCSDK}/external") # 外部依赖库目录
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```
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