cmake 引入opencv4

原文件在slam2的ch5/stereo 

 

#查找某个库的包
find_package(Pangolin REQUIRED)

#设置包的路径变量
set(ENV{PKG_CONFIG_PATH} /usr/local/lib/pkgconfig)
#查找pkconfig下的所有包
find_package(PkgConfig REQUIRED)
#查找pkconfig下的opencv4.pc
pkg_search_module(PKG_OPENCV REQUIRED opencv4)

#PKG_OPENCV相关头文件/库的输出
MESSAGE(STATUS "PKG_OPENCV_FOUND:          ${PKG_OPENCV_FOUND}")			#有没有找到		    eg: -- PKG_OPENCV_FOUND:        1
MESSAGE(STATUS "PKG_CONFIG_EXECUTABLE:     ${PKG_CONFIG_EXECUTABLE}")		#pkg-config脚本路径	 eg:  /usr/bin/pkg-config
MESSAGE(STATUS "PKG_CONFIG_VERSION_STRING: ${PKG_CONFIG_VERSION_STRING}")	#pkg-config版本号	  相当于执行: pkg-config --version

MESSAGE(STATUS "PKG_OPENCV_VERSION:        ${PKG_OPENCV_VERSION}")			#opencv的版本		  相当于执行: pkg-config opencv --modversion
MESSAGE(STATUS "PKG_OPENCV_PREFIX:         ${PKG_OPENCV_PREFIX}&#