设置cmake最低版本

1	cmake_minimum_required(VERSION 3.0)

设置项目名称

1	project(rtpsender)

设置源码路径

1 2	file(GLOB SRC_LIST ${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp) # 搜索文件，绝对路径 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include) # 头目录

设置库目录

1	link_directories(${CMAKE_CURRENT_SOURCE_DIR}/lib) # 库目录

设置输出目录

1 2	set(LIBRARY_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/lib) # 库输出路径 set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin) # 可执行程序输出路径

生成二进制

#set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON) # windows下导出所有符号
add_library(calc STATIC ${SRC_LIST})  #生成静态库

add_library(calc SHARED ${SRC_LIST})  #生成动态库

add_executable(app ${SRC_LIST}) # 生成可执行程序

链接库

注：链接库一定要在生成可执行程序之后

1	target_link_libraries(app pthread calc) # 链接动态/静态库

编译细节输出

1	set(CMAKE_VERBOSE_MAKEFILE ON)

判断编译环境

if(WIN32)
    message(STATUS "This is windows.")
elseif(UNIX)
    message(STATUS "This is UNIX.")
endif()

if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
    message(STATUS "Operating system is Windows")
elseif (CMAKE_SYSTEM_NAME STREQUAL "Linux")
    message(STATUS "Operating system is Linux")
elseif (CMAKE_SYSTEM_NAME STREQUAL "Darwin")
    message(STATUS "Operating system is macOS")
else ()
    message(STATUS "Unknown operating system")
endif ()

if (CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64" OR CMAKE_SYSTEM_PROCESSOR MATCHES "amd64")
    message(STATUS "CPU architecture is x86_64 (64-bit)")
elseif (CMAKE_SYSTEM_PROCESSOR MATCHES "i686" OR CMAKE_SYSTEM_PROCESSOR MATCHES "i386")
    message(STATUS "CPU architecture is x86 (32-bit)")
elseif (CMAKE_SYSTEM_PROCESSOR MATCHES "arm" OR CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64")
    message(STATUS "CPU architecture is ARM")
elseif (CMAKE_SYSTEM_PROCESSOR MATCHES "ppc" OR CMAKE_SYSTEM_PROCESSOR MATCHES "powerpc")
    message(STATUS "CPU architecture is PowerPC")
else ()
    message(STATUS "Unknown CPU architecture: ${CMAKE_SYSTEM_PROCESSOR}")
endif ()

忽略库rpath

1	set(CMAKE_SKIP_RPATH TRUE)

添加宏定义

1	add_definitions(-D宏名称=x)

设置编译版本

# SET(CMAKE_BUILD_TYPE "Debug") # 默认
SET(CMAKE_BUILD_TYPE "Release")

# msvc上述命令无用，需要在编译时指定 cmake --build . --config Release

设置编译器标志以生成32位代码

1 2	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")

MSVC设置32位or64位

cmake .. -G "Visual Studio 14 2015" # 默认32位
cmake .. -G "Visual Studio 14 2015" -A x64 # 64位

cmake .. -G "Visual Studio 17 2022" # 默认64位
cmake .. -G "Visual Studio 17 2022" -A Win32 # 32位

vs2015下载链接 http://download.microsoft.com/download/5/d/1/5d1ec81e-bc59-448f-9ab6-27636d5cc18a/vs2015.3.com_chs.iso

输出list

1	# message("source: ${SRC_LIST}") # 打印

修改list

1 2	list(APPEND SRC_LIST ${SRC_1} ${SRC_2} ...) # 追加：SRC_LIST = SRC_1 + SRC_2 + ... list(REMOVE_ITEM SRC_LIST ${PROJECT_SOURCE_DIR}/main.cpp) # 去除

生成项目

1
2
3

mkdir build
cd build
cmake .. #-DCMAKE_GNUtoMS=ON MinGW生成动态库加上这个可以供MSVC链接

重新生成项目

1	cmake -S .. -B build

生成二进制

Linux

方法一

make

方法二

1	cmake --build .

windows

1 2	cmake --build . # 生成Debug版本 cmake --build . --config release # 生成Release版本

指定编译器

1	cmake -G # 列举支持的编译器

1	cmake .. -G "MinGW Makefiles" # 指定为MinGW

例

root@DESKTOP-RXXXXXT:~/easyrtp# tree
.
|-- CMakeLists.txt
|-- build
|-- include
|   `-- easyrtp.h
`-- src
    |-- easyrtp.cpp
    `-- main.cpp

4 directories, 4 files

cmake_minimum_required(VERSION 3.0) # cmake 版本
project(rtpsender)                  # 项目名字
SET(CMAKE_BUILD_TYPE "Debug")

file(GLOB SRC_LIST ${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp) # 搜索文件，绝对路径
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include)  # 头目录

add_executable(app ${SRC_LIST}) # 生成可执行程序