ubuntu16.04 Cmake学习二
本节主要总结编译程序的时候使用了第三方库的情况,以调用开源opencv-2.4.9为例子,具体安装详见http://www.cnblogs.com/xsfmg/p/5900420.html。
工程文件目录创建
/home/bmi-zc/project:
|—CMakeLists.txt 顶层CMakeLists
|
|—bin
|
|—include
| test.h
| ceshi.h
|
|—lib
|
|—src
| CMakeLists.txt
|
|—main
| CMakeLists.txt
| main.cpp
|
|—test
CMakeLists.txt
test1.cpp
test2.cpp
ceshi.cpp
程序清单
test.h
#ifndef INCLUDE_TEST_H
#define INCLUDE_TEST_H
#include <stdio.h>
void t1();
void t2();
#endif /*INCLUDE_TEST_H*/
ceshi.h
#ifndef INCLUDE_CESHI_H
#define INCLUDE_CESHI_H
#include <cv.h>
#include <highgui.h>
int t3();
#endif /*INCLUDE_CESHI_H*/
test1.cpp
#include "/home/bmi-zc/project/include/test.h"
void t1()
{
printf("this is t1()\n");
}
test2.cpp
#include "/home/bmi-zc/project/include/test.h"
void t2()
{
printf("this is t2()\n");
}
ceshi.cpp
#include "/home/bmi-zc/project/include/ceshi.h"
using namespace cv;
int t3()
{
Mat image;
image = imread("/home/bmi-zc/project/test1.jpg", 1);
if (!image.data)
{
printf("No image data\n");
return -1;
}
namedWindow("Display Image", CV_WINDOW_AUTOSIZE);
imshow("Display Image", image);
waitKey(0);
return 0;
}
main.cpp
#include "/home/bmi-zc/project/include/test.h"
int main()
{
t1();
t2();
t3();
return 0;
}
- 这一节里,因为opencv主要采用C++编写,所以我们的编译器变成了g++,在建立算法程序后缀需要用.cpp。
- 这一节将头文件都统一整理在了test.h和ceshi.h,其中test.h里是c语言库标准头文件,ceshi.h里是我们要用到的opencv的头文件。
CMakeLIsts.txt清单
/home/bmi-zc/project/CMakeLists.txt
cmake_minimum_required(VERSION 3.5)
PROJECT(TEST)
ADD_SUBDIRECTORY(src)
/home/bmi-zc/project/src/CMakeLists.txt
ADD_SUBDIRECTORY(main)
ADD_SUBDIRECTORY(test)
/home/bmi-zc/project/src/test/CMakeLists.txt
SET(CMAKE_CXX_COMPTLER g++) //编译器采用g++
SET(SRC_LIST test1.cpp test2.cpp ceshi.cpp)
INCLUDE_DIRECTORIES(/home/bmi-zc/opencv-2.4.9/include/opencv) //opencv头文件目录
INCLUDE_DIRECTORIES(${PROJECT_SOURCE_DIR}/include)
SET(LIBRARY_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/lib)
ADD_LIBRARY(libtest STATIC ${SRC_LIST})
/home/bmi-zc/project/src/main/CMakeLists.txt
SET(SRC_LIST main.cpp)
INCLUDE_DIRECTORIES(${PROJECT_SOURCE_DIR}/include)
FIND_PACKAGE(OpenCV REQUIRED)
SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
ADD_EXECUTABLE(main ${SRC_LIST})
link_directories(${PROJECT_SOURCE_DIR}/lib)
TARGET_LINK_LIBRARIES(main ${OpenCV_LIBS})
TARGET_LINK_LIBRARIES(main libtest)
-
重点介绍find_package命令
find_package可以被用来在系统中自动查找配置构建工程所需的程序库。CMake自带的模块文件里有大半是对各种常见开源库的find_package支持。
编译&运行
-
回到工程根目录,/home/bmi-zc/project
cmake .
make
-
进入bin文件夹,执行main可执行文件
cd bin
./main
分享推送
比较优秀的博文:
- CMake使用进阶,作者linghutf,写于2016年6月。
http://linghutf.github.io/2016/06/16/cmake/