Cmake减少输出可执行文件的大小

1、使用Release模式

set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -s")
set(CMAKE_BUILD_TYPE "RELEASE")

2、使用strip命令删除调试信息等

set(CMAKE_STRIP "strip")
add_custom_command(TARGET  ${PROJECT_NAME} POST_BUILD
        COMMAND ${CMAKE_STRIP} "$<TARGET_FILE:${PROJECT_NAME}>"
        COMMENT "Strip debug symbols done on final binary.")

例如一个HelloWorld程序的原CMakeLists.txt没优化前如下

cmake_minimum_required(VERSION 3.20)
project(HelloWorld)

set(CMAKE_CXX_STANDARD 17)

add_executable(HelloWorld HelloWorld.cpp)

优化前文件体积3183KB

优化后

cmake_minimum_required(VERSION 3.20)
project(HelloWorld)

set(CMAKE_STRIP "strip")
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -s")
set(CMAKE_BUILD_TYPE "RELEASE")
set(CMAKE_CXX_STANDARD 17)

add_executable(HelloWorld HelloWorld.cpp)
add_custom_command(TARGET  ${PROJECT_NAME} POST_BUILD
        COMMAND ${CMAKE_STRIP} "$<TARGET_FILE:${PROJECT_NAME}>"
        COMMENT "Strip debug symbols done on final binary.")

优化后体积912KB,当然如果你如果需要保留exe文件调试信息，请酌情使用RELEASE