一个CMakeLists.txt的例子
参考:
https://www.hahack.com/codes/cmake/
https://blog.csdn.net/afei__/article/details/81201039

 double power(double base, int exponent);

 #include <math.hpp>

 double power(double base, int exponent)

 {

     int result = base;

     int i;

     if (exponent == ) {

         return ;

     }

     for(i = ; i < exponent; ++i){

         result = result * base;

     }

     return result;

 }

 #include <opencv2/opencv.hpp>

 #include <opencv2/core/core.hpp>

 #include <opencv2/highgui/highgui.hpp>

 #include <iostream>

 #include <math.hpp>

 using namespace std;

 using namespace cv;

 int main(){

     cout<<CV_VERSION<<endl;

     Mat im=imread("test.jpg");

     if(!im.empty())

         cout<<"读取图片成功"<<endl;

     else

         cout<<"读取图片失败"<<endl;

     double res=power(,);

     cout<<res<<endl;

     return ;

 }

#指定cmake 版本

CMAKE_MINIMUM_REQUIRED(VERSION 3.2)

#指定项目名称，一般和项目的文件夹名称对应

PROJECT(test)

#头文件目录

INCLUDE_DIRECTORIES(include /usr/local/include/)

#等价的设置方式

#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -I$/usr/local/include")

#链接库路径

LINK_DIRECTORIES(/usr/local/lib/)

#等价的设置方式

#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -L$/usr/local/lib")

#查找到指定的预编译库，并将它的路径存储在变量中

FIND_LIBRARY(OPENCV_LIB_PATH opencv_core)

MESSAGE(${OPENCV_LIB_PATH})#/usr/local/lib/libopencv_core.so

#源文件目录

AUX_SOURCE_DIRECTORY(. SRC_LIST)

#也可以这样匹配

#FILE(GLOB SRC_LIST "*.cpp" "src/*.cpp")

#添加子目录,子目录里有另一CMakeLists.txt待编译

#ADD_SUBDIRECTORY(src)

#生成链接库，可以指定SHARED,STATIC参数

#ADD_LIBRARY(math STATIC math.cpp)

ADD_LIBRARY(math SHARED src/math.cpp)

#设置一些变量SET,LIST(APPEND/REMOVE_ITEM)

#SET(SRC_LIST main.cpp)

#LIST(APPEND SRC_LIST src/math.cpp)

#LIST(REMOVE_ITEM SRC_LIST src/math.cpp)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11  -g")

SET(OPENCV_LIBS opencv_highgui opencv_imgcodecs opencv_core)

#添加要编译的可执行文件

ADD_EXECUTABLE(main ${SRC_LIST})

#添加可执行文件所需要链接的库

TARGET_LINK_LIBRARIES(main ${OPENCV_LIBS} math)