ROS安装过程中eigen3丢失错误答案

【问题标题】：eigen3 missing error during ROS installationROS安装过程中eigen3丢失错误
【发布时间】：2017-05-11 10:07:42
【问题描述】：

您好，我正在尝试使用自制软件在我的 MAC 上安装 ROS。安装时收到此消息：

 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，所以有人可以帮我解决这个问题。我检查了是否安装了 Eigen，版本 3.2.4 已经安装

【问题讨论】：

Could not find a package configuration file provided by "Eigen3"的可能重复

标签： cmake homebrew ros

【解决方案1】：

This 为我解决了这个问题。

这似乎已经解决了，但我会分享我是如何得到这个的工作：在 ros 构建工作区的其他地方，我找到了一份 FindEigen3.cmake：

ros_catkin_ws$ cp src/orocos_kinematics_dynamics/orocos_kdl/config/FindEigen3.cmake
src/perception_pcl/pcl_ros/cfg/ 然后我从 CMakeLists：

find_package(Eigen 3 Required) 用这些行替换它 orocos CMakeLists

find_package(Eigen 3 QUIET) if(NOT Eigen_FOUND)
包括（${PROJ_SOURCE_DIR}/cfg/FindEigen3.cmake）
设置（Eigen_INCLUDE_DIR ${EIGEN3_INCLUDE_DIR}）endif（） include_directories(${Eigen_INCLUDE_DIR}) 老实说，我构建时没有更改配置-> cfg，但似乎有工作。

【讨论】：

【解决方案2】：

我为解决这个问题所做的是：

使用 .cmake 文件中的消息 (WARNING ${CMAKE_ROOT}) 打印出 CMAKE_ROOT 的当前值
确保 Modules/FindEigen3.cmake 存在于该文件夹中
如果没有，请从https://github.com/RainerKuemmerle/g2o/blob/master/cmake_modules/FindEigen3.cmake 下载副本

【讨论】：