工具使用日常记录

cmake

• find_package的使用。
• 指定opencv路径

  SET(OpenCV_DIR /Users/suyingcheng/workspace/others/opencv/build)
  FIND_PACKAGE(OpenCV REQUIRED)
  INCLUDE_DIRECTORIES(${OPENCV_INCLUDE_DIRS})

g++

• 编译cpp文件时指定依赖的头文件及lib命令，比如编译test.cpp，依赖opencv。-I参数后面是include文件夹，-L参数后面是lib所在文件夹，-l参数后面是具体的lib名字。编译成功后运行可执行文件的时候还需要将lib所在文件夹添加到环境变量里面。linux对应的是LD_LIBRARY，OS X是DYLD_LIBRARY_PATH。

  g++ -std=c++11 read_video.cpp -o read_video -I/Users/suyingcheng/workspace/local/include -L/Users/suyingcheng/workspace/local/lib -lopencv_shape -lopencv_stitching -lopencv_objdetect -lopencv_superres -lopencv_videostab -lopencv_calib3d -lopencv_features2d -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_video -lopencv_photo -lopencv_ml -lopencv_imgproc -lopencv_flann -lopencv_core