如何在Linux中将OpenCV添加到LD_LIBRARY_path？

Question

我使用this链接来安装OpenCV。

什么有效：

1.OpenCV适用于python（从终端运行）。

2.我可以在单个C ++程序中导入opencv库。

什么行不通：

当代码遍布多个时，您需要使用CMake构建它。

这是我的CmakeLists.txt：

1.cmake_minimum_required(VERSION 3.9)

2.project(Image_processing)

3.set(CMAKE_CXX_STANDARD 14)

4.find_package(OpenCV REQUIRED)

5.include_directories(/home/user/opencv/build)

6.add_executable(main main.cpp)

7.target_link_libraries(project_name ${OpenCV_LIBS})

错误（可以通过在上面的CMake文件中注释第4,5和7行来重新生成它们）：

undefined reference到OpenCV的功能。

CMake Error at CMakeLists.txt:7 (target_link_libraries):
  Cannot specify link libraries for target "Image_processing" which is not
  built by this project.

Answer 1

纠正它：

cmake_minimum_required(VERSION 3.5)

project(Image_processing)

set(CMAKE_CXX_STANDARD 14)

find_package(OpenCV REQUIRED)

include_directories(${OpenCV_INCLUDE_DIRS})

add_executable(main main.cpp)

target_link_libraries(main ${OpenCV_LIBS})

Answer 2

在CMakeLists.txt中，exe-name与target-link-name不匹配。我修改了这条线，然后它可以在我的电脑上运行。

---

CMakeLists.txt的OpenCV Project：

cmake_minimum_required(VERSION 3.5)

project(Image_processing)

set(CMAKE_CXX_STANDARD 14)

find_package(OpenCV REQUIRED)

#include_directories(/home/user/opencv/build)

add_executable(Image_processing main.cpp)

target_link_libraries(Image_processing ${OpenCV_LIBS})