使用Cmake编译opencv时遇到问题

Question

我是要在Windows 下使用Cmake 编译opencv，然后导入QT进行使用。能帮我看一下这是哪里错了吗，都是按照博主的教程来的，还是不行，opencv contrib 也下了。

下面是错误提醒

```c
CMake Deprecation Warning at CMakeLists.txt:22 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


CMake Deprecation Warning at CMakeLists.txt:72 (cmake_policy):
  The OLD behavior for policy CMP0020 will be removed from a future version
  of CMake.

  The cmake-policies(7) manual explains that the OLD behaviors of all
  policies are deprecated and that a policy should be set to OLD only under
  specific short-term circumstances.  Projects should be ported to the NEW
  behavior and not rely on setting a policy to OLD.


CMake Deprecation Warning at CMakeLists.txt:76 (cmake_policy):
  The OLD behavior for policy CMP0022 will be removed from a future version
  of CMake.

  The cmake-policies(7) manual explains that the OLD behaviors of all
  policies are deprecated and that a policy should be set to OLD only under
  specific short-term circumstances.  Projects should be ported to the NEW
  behavior and not rely on setting a policy to OLD.


CMake Deprecation Warning at CMakeLists.txt:81 (cmake_policy):
  The OLD behavior for policy CMP0026 will be removed from a future version
  of CMake.

  The cmake-policies(7) manual explains that the OLD behaviors of all
  policies are deprecated and that a policy should be set to OLD only under
  specific short-term circumstances.  Projects should be ported to the NEW
  behavior and not rely on setting a policy to OLD.


Can't detect runtime and/or arch
CMake Error at cmake/OpenCVCompilerOptions.cmake:21 (else):
  Flow control statements are not properly nested.
Call Stack (most recent call first):
  CMakeLists.txt:495 (include)


Configuring incomplete, errors occurred!

Answer 1

以下内容由CHATGPT及阿里嘎多学长共同生成、有用望采纳：

这个问题可能是由于缺少必要的依赖项或配置错误引起的。建议重新检查CMake配置是否正确，并确保已正确设置必要的环境变量和路径。

另外，您可以尝试使用CMake的GUI界面来配置和生成项目，以便更方便地调试和调整配置选项。

以下是可能有用的一些示例代码：

cmake_minimum_required(VERSION 3.0)
project(opencv_example)
find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})
add_executable(example example.cpp)
target_link_libraries(example ${OpenCV_LIBS})

在这个示例中，我们使用CMake来构建一个名为“opencv_example”的项目，并使用OpenCV作为依赖项。我们首先查找OpenCV，并将其包含目录添加到项目中。我们然后创建一个可执行文件“example”，并将其链接到OpenCV库。

希望这些信息有助于解决您的问题！