C++项目-Using C++ on Linux in VS Code

准备工作

安装VScode  
安装 远程 ssh-remote

Linux环境准备

 gcc  -v 
 gdb  -v
 库函数
   命令：  gcc -v -E -x c++ -

C++ extension

安装 VScode插件 C++ extension for VS Code.	 
配置环境写代码
  01.Build helloworld.cpp
    代码
  02 Running the build and Modifying tasks.json
    create a tasks.json file to tell VS Code how to build (compile) the program
       Terminal > Configure Default Build Task >  Choose C/C++: g++ build active file
  03.Debug helloworld.cpp     
     create a launch.json file
       Run > Add Configuration... and then choose C++ (GDB/LLDB). Choose g++ build and debug active file.
  04.more C/C++ configurations
     create a c_cpp_properties.json file  

冲突和问题解决

  头文件包含问题
  Cmake “.cmaketools.json”文件内容去覆盖 “c_cpp_properties.json”
要求
   使vscode     能够支持对于opencv的库导入和语法提示、
   使gcc        支持对含有opencv源代码的编译、
   使gdb        支持对含有opencv代码的可执行程序的调试。
解决办法：
   opencv的库导入和语法提示，
      可直接通过修改.vscode配置文件中c_cpp_properties.json实现
    gcc对含有opencv源代码的编译，
	   需修改task.json中编译命令行中加入相关头文件目录、链接库目录以及相关的链接库文件，
       而这本身opencv并不自带，
	   需要自行通过利用cmake编译opencv源文件生成，而Cmake的编译又需要python的环境
    gdb对含opencv相关代码的可执行调试，
	    需要gdb加载支持可执行文件中opencv相关功能的dll，
		这依然是通过利用cmake编译opencv源文件代码生成的		   

具体配置文件

含c++的文件夹，将会生成一个.vscode文件夹，所有的配置将在这个文件夹中进行配置
01.task.json
 {
     "tasks": [
         {
             "type": "cppbuild",
             "label": "C/C++: g++ build active file",
             "command": "/usr/bin/g++",
             "args": [
                 "-g",
                 "${file}",
                 "-o",
                 "${fileDirname}/${fileBasenameNoExtension}",  
                 "`pkg-config", "--cflags", "--libs", "opencv`",
                 "-I", "/usr/local/include",
                 "-I", "/usr/local/include/opencv",
                 "-I", "/usr/local/include/opencv2",
                 "-L", "/usr/local/lib",
                 "-l", "opencv_core",
                 "-l", "opencv_imgproc",
                 "-l", "opencv_imgcodecs",
                 "-l", "opencv_video",
                 "-l", "opencv_ml",
                 "-l", "opencv_highgui",
                 "-l", "opencv_objdetect",
                 "-l", "opencv_flann",
                 "-l", "opencv_imgcodecs",
                 "-l", "opencv_photo",
                 "-l", "opencv_videoio"
             ],
             "options": {
                 "cwd": "${fileDirname}"
             },
             "problemMatcher": [
                 "$gcc"
             ],
             "group": {
                 "kind": "build",
                 "isDefault": true
             },
             "detail": "Task generated by Debugger."
         }
     ],
     "version": "2.0.0"
 }	

02 launch.json
 {
 "version": "0.2.0",
 "configurations": [
     {
         "name": "g++ - Build and debug active file",
         "type": "cppdbg",
         "request": "launch",
         "program": "${fileDirname}/${fileBasenameNoExtension}",
         "args": ["/data/video/video/test.mp4","/data/video/frame/"],
         "stopAtEntry": false,
         "cwd": "${fileDirname}",
         "environment": [],
         "externalConsole": false,
         "MIMode": "gdb",
         "setupCommands": [
             {
                 "description": "Enable pretty-printing for gdb",
                 "text": "-enable-pretty-printing",
                 "ignoreFailures": true
             }
         ],
         "preLaunchTask": "C/C++: g++ build active file",
         "miDebuggerPath": "/usr/bin/gdb"
     }
 ]
 }
	
03.c_cpp_properties.json
 {
     "configurations": [
         {
             "name": "Linux",
             "includePath":  [
                 "${workspaceFolder}/**",
                 "/usr/include/c++/5",
                 "/usr/include/x86_64-linux-gnu/c++/5",
                 "/usr/include/c++/5/backward",
                 "/usr/lib/gcc/x86_64-linux-gnu/5/include",
                 "/usr/local/include",
                 "/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed",
                 "/usr/include",
                 "/usr/include/opencv2",
                 "/usr/include/opencv",
                 "/usr/lib/x86_64-linux-gnu/"
             ],
             "defines": [],
             "compilerPath": "/usr/bin/gcc",
             "cStandard": "gnu11",
             "cppStandard": "gnu++98",
             "intelliSenseMode": "linux-gcc-x64"
         }
     ],
     "version": 4
 }

参考：

     Using C++ on Linux in VS Code  https://code.visualstudio.com/docs/cpp/config-linux
 小白也能懂的ubuntu下Vscode中使用C++运行opencv  https://www.jianshu.com/p/41f87292b34c
 opencv3.2.0实现视频抽帧，并保存成图片 https://www.cnblogs.com/ilykaihui/p/8010566.html