在ROS安装过程中缺少eigen3错误

Question

嗨，我正试着用homebrew.While安装在我的MAC上安装ROS，我收到了这样的消息：

 CMake Error at CMakeLists.txt:7 (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.
-- Configuring incomplete, errors occurred!
See also "/Users/Jishnu/ros_catkin_ws/build_isolated/pcl_ros/CMakeFiles/CMakeOutput.log".
<== Failed to process package 'pcl_ros': 
Command '['/Users/Jishnu/ros_catkin_ws/install_isolated/env.sh', ' cmake',      '/Users/Jishnu/ros_catkin_ws/src/perception_pcl/pcl_ros', '-  DCATKIN_DEVEL_PREFIX=/Users/Jishnu/ros_catkin_ws/devel_isolated/pcl_ros', '-DCMAKE_INSTALL_PREFIX=/Users/Jishnu/ros_catkin_ws/install_isolated', '-DCMAKE_BUILD_TYPE=Release', '-G', 'Unix Makefiles']' returned non-zero exit status 1

我是ROS的初学者，所以有人能帮我解决这个问题吗？我已经检查了艾根是否安装了，3.2.4版本已经安装了

Answer 1

这帮我解决了这个问题。

这个问题似乎已经解决了，但我将分享我是如何做到这一点的:在ros构建工作区的其他地方，我找到了FindEigen3.cmake的一个副本： src/orocos_kinematics_dynamics/orocos_kdl/config/FindEigen3.cmake ros_catkin_ws$ cp src/知觉_pcl/pcl_ros/cfg/然后我从CMakeLists中删除以下内容： Find_package(所需的特征3)用来自orocos CMakeLists的这些线替换它 Find_package(特征3安静)如果(不是Eigen_FOUND) include(${PROJ_SOURCE_DIR}/cfg/FindEigen3.cmake) set(Eigen_INCLUDE_DIR ${EIGEN3_INCLUDE_DIR}) endif() include_directories(${Eigen_INCLUDE_DIR})非常诚实，我在构建时没有更改配置-> cfg，但它似乎已经成功了。

Answer 2

我为解决这个问题所做的是：

• 通过在CMAKE_ROOT文件中使用消息(警告${CMAKE_ROOT})打印出它来查找.cmake的当前值
• 确保模块/FindEigen3.cmake存在于该文件夹中
• 如果没有，请从模块/FindEigen3.cmake下载一个副本。