在Windows中配置cmake项目时找不到Eigen3_DIR

问题描述

我想编译一个
那么我该怎么做才能解决它？我只是cmake的初学者。

解决方案

我假设您正在使用Windows。您将需要安装Visual Studio。您可以使用社区版本。您将需要执行以下操作：

1. 在Eigen目录中创建一个名为 build的目录。


2. 转到构建目录并执行 cmake ..。这将创建Visual Studio项目。


3. 使用Visual Studio加载.sln。


4. 构建解决方案。


5. 确保还建立了名为INSTALL的项目。

这将在您的安装目录中创建Eigen3Config.cmake文件。在我的情况下，安装目录为 C：\Program Files（X86）\Eigen3。使用它作为Eigen3_DIR变量的值。
默认情况下，Eigen并不随Eigen3Config.cmake文件一起提供。您将

HTH

，请参见Eigen3Config.cmake.in文件。

I want to compile an open project, it needs Eigen3, I followed its guideline but stuck in this step:

"Set environment variable Eigen3_DIR to {YOUR_EIGEN3_DIRECTORY}/eigen3/cmake."

I have installed CMake gui and it printed following errors after configuration

Make Error at src/CMakeLists.txt:15 (find_package):
  By not providing "FindEigen3.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Eigen3", but
  CMake did not find one.

  Could not find a package configuration file provided by "Eigen3" with any
  of the following names:

    Eigen3Config.cmake
    eigen3-config.cmake

  Add the installation prefix of "Eigen3" to CMAKE_PREFIX_PATH or set
  "Eigen3_DIR" to a directory containing one of the above files.  If "Eigen3"
  provides a separate development package or SDK, be sure it has been
  installed.

But I have downloaded Eigen3 from here, and set the Eigen3_DIR as followsSo what should I do to fix it? I am just a beginner in cmake.

解决方案

I am assuming you are using Windows. You will need Visual Studio installed. You can use the community version. You will need to do the following:

1. Create a directory called "build" within your Eigen directory.
2. Go to the build directory and do "cmake ..". This will create Visual Studio projects.
3. Load the .sln using Visual Studio.
4. Build the solution.
5. Ensure that the project called INSTALL was built also.

This will create the Eigen3Config.cmake file in your install directory. In my case the install directory was "C:\Program Files(X86)\Eigen3. Use this to as the value for Eigen3_DIR variable.By default Eigen does not come with the Eigen3Config.cmake file. You will see Eigen3Config.cmake.in file. This is used to build the Eigen3Config.cmake file.

HTH

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