常见cmake命令总结

常见cmake命令总结

cmake常见命令

• cmake_minimum_required - 指定CMake的最小版本要求

cmake_minimum_required (VERSION 2.8)

• project - 定义工程名称

project (PROJECT_NAME)

• set - 显式的定义变量

set(SRC main.cpp hello.cpp)
# 将main.cpp和hello.cpp定义为SRC

• 添加编译器参数

add_compile_options(-Wall -std=c++17 -O2 -g)
# 这是对于所有的编译器增加的编译器参数，如果想只针对g++编译器可以用下面这个命令
set(CMAKE_CXX_FLAGS " ${CMAKE_CXX_FLAGS} -g -O2 -std=c++17")

• 搜索目录下的源文件并定义变量

aux_source_directory(. SRC)
# 搜索当前目录下的源文件定义为SRC

• CMAKE_BUILD_TYPE 编译类型(Debug, Release)

set(CMAKE_BUILD_TYPE Debug)

• 添加头文件搜索路径

#相当于-I命令
include_directories(./include /usr/build/include)

• 添加库文件搜索路径

#相当于-L命令
link_directories(/usr/build/lib ./lib)

• add_library生成库文件

# add_library(libname [SHARED|STATIC|MODULE] [EXCLUDE_FROM_ALL] source1 source2 ... sourceN)
add_library(hello SHARED ${SRC})

• 生成可执行文件

add_executable(main ${SRC} main.cpp)

• 动态链接库

#相当于-l命令
# add_library(hello SHARED ${SRC})
target_link_libraries(main hello)
# 将动态库hello链接到可执行文件main

• 添加子文件夹路径

add_subdirectory(src)
# 子文件夹中必须也有CMakeLists.txt

示例

项目文件夹目录：

src子文件夹：

test子文件夹：

utils子文件夹：

项目主文件夹的CMakeLists.txt：

project (feature_detection)
cmake_minimum_required(VERSION 3.0)
set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")


find_package(OpenCV 4.5.1 REQUIRED)


MESSAGE ( STATUS "OpenCV library status:" )
MESSAGE ( STATUS "version ${OpenCV_VERSION}" )
MESSAGE ( STATUS "libraries ${OpenCV_LIBS}" )
MESSAGE ( STATUS "include path ${OpenCV_INCLUDE_DIRS}" ) 
include_directories(${OpenCV_INCLUDE_DIRS})
include_directories(${CMAKE_SOURCE_DIR}/src)
include_directories(${CMAKE_SOURCE_DIR}/utils)

add_subdirectory(utils)
add_subdirectory(src)
add_subdirectory(test)

src子文件夹CMakeLists.txt：

add_library(LoG LoG.cpp)
target_link_libraries(LoG ${OpenCV_LIBS} utils)


add_library(harris_corner harris_corner.cpp)
target_link_libraries(harris_corner ${OpenCV_LIBS} utils)

add_library(canny canny.cpp)
target_link_libraries(canny ${OpenCV_LIBS} utils)

utils子文件夹CMakeLists.txt：

add_library(utils 
    display.cpp 
    tictoc.cpp
    opencv_utils.cpp
)
target_link_libraries(utils ${OpenCV_LIBS})

test子文件夹CMakeLists.txt：

add_executable(test_LoG test_LoG.cpp)
target_link_libraries(test_LoG LoG ${OpenCV_LIBS} utils)

add_executable(test_harris_corner test_harris_corner.cpp)
target_link_libraries(test_harris_corner harris_corner ${OpenCV_LIBS} utils)


add_executable(test_canny test_canny.cpp)
target_link_libraries(test_canny canny ${OpenCV_LIBS} utils)