升级到 macOS Catalina 后使用 cmake 为 c++ 构建 opencv4 失败答案

【问题标题】：Build of opencv4 for c++ using cmake failing after upgrading to macOS Catalina升级到 macOS Catalina 后使用 cmake 为 c++ 构建 opencv4 失败
【发布时间】：2020-10-27 00:16:17
【问题描述】：

嗨，我正在尝试使用 cmake 从源代码构建 opencv4（遵循 https://thecodinginterface.com/blog/opencv-cpp-vscode/）。我将我的 macOS 更新到 10.15 并安装了最新的 xcode。我 git 克隆了存储库并如下创建了一个构建目录，然后我尝试配置 cmake：

$ mkdir opencv
$ cd opencv
$ git clone https://github.com/opencv/opencv.git
$ cd opencv
$ git checkout tags/4.2.0
$ cd ..
$ git clone https://github.com/opencv/
$ cd opencv_contrib 
$ git checkout tags/4.2.0
$ cd ..


$ cd build_opencv
$ cmake -D CMAKE_BUILD_TYPE=RELEASE \
      -D CMAKE_INSTALL_PREFIX=../install \
      -D INSTALL_C_EXAMPLES=ON \
      -D OPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules \
      -D BUILD_EXAMPLES=ON ../opencv

我收到以下错误，它似乎正在尝试找到这个不存在的路径：

"/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/OpenGL.framework"

我已将我的 mac 版本更新到 10.15，但它似乎正在寻找 MacOSX10.14 下的路径。我在网上查过，但似乎找不到任何建议？

CMake Error in /usr/local/include/opencv/build_opencv/CMakeFiles/CMakeTmp/CMakeLists.txt:
  Imported target "VTK::RenderingOpenGL2" includes non-existent path

    "/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/OpenGL.framework"

  in its INTERFACE_INCLUDE_DIRECTORIES.  Possible reasons include:

  * The path was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and references files it does not
  provide.



CMake Error in /usr/local/include/opencv/build_opencv/CMakeFiles/CMakeTmp/CMakeLists.txt:
  Imported target "VTK::RenderingOpenGL2" includes non-existent path

    "/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/OpenGL.framework"

  in its INTERFACE_INCLUDE_DIRECTORIES.  Possible reasons include:

  * The path was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and references files it does not
  provide.



CMake Error in /usr/local/include/opencv/build_opencv/CMakeFiles/CMakeTmp/CMakeLists.txt:
  Imported target "VTK::RenderingOpenGL2" includes non-existent path

    "/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/OpenGL.framework"

  in its INTERFACE_INCLUDE_DIRECTORIES.  Possible reasons include:

  * The path was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and references files it does not
  provide.



CMake Error at cmake/OpenCVDetectVTK.cmake:73 (try_compile):
  Failed to generate test project build system.
Call Stack (most recent call first):
  CMakeLists.txt:767 (include)


-- Configuring incomplete, errors occurred!

【问题讨论】：

安装 XCode 和安装 XCode CLT 是两个不同的任务。你两个都做了吗？您在升级到 Catalina 之前是否已经构建了这个？如果是这样，您需要摆脱旧的安装文件夹并从头开始。你检查过 openCV 的要求和它支持的内容吗？
我在升级到 Catalina 后安装了 Xcode 和 XCode CLT。我还检查了要求并安装了必要的先决条件。我只是不知道为什么它还在寻找macOS10.14下的路径？你的意思是把opencv的安装文件夹去掉，重新开始？

标签： c++ cmake macos-catalina opencv4

【解决方案1】：

下载安装

XCode 12 的命令行工具

来自apple developer tools downloads。

过去，您可以执行xcode-select --install，它会为您执行此操作，但是，现在发生了一个错误，它说它找不到包或类似的东西。因此，必须采取这种方法。

【讨论】：