ROS_PACKAGE_PATH问题。在设置.bashrc时需要帮助

Question

我增加了

export ROS_PACKAGE_PATH="/home/kathir/ORB_SLAM":${ROS_PACKAGE_PATH}

在.bashrc中，我在cmake of ORB_SLAM中得到了这个错误。

ORB_SLAM cloned path : "/home/kathir/ORB_SLAM"

由于我使用"/home/kathir/catkin_ws/devel/setup.bash" for ARDRONE，所以在.bashrc中有另一个工作区。

CMake Error at /opt/ros/indigo/share/ros/core/rosbuild/private.cmake:102 (message):
  [rosbuild] rospack found package "ORB_SLAM" at "", but the current
  directory is "/home/kathir/ORB_SLAM".  You should double-check your
  ROS_PACKAGE_PATH to ensure that packages are found in the correct
  precedence order.

请查看下面的进一步信息。

kathir@kathir-VirtualBox:~/ORB_SLAM/build$ source .bashrc
bash: .bashrc: No such file or directory
kathir@kathir-VirtualBox:~/ORB_SLAM/build$ $ROS_PACKAGE_PATH
bash: /opt/ros/indigo/share:/opt/ros/indigo/stacks:M$:: No such file or directory

Answer 1

您可能会看到的错误是由于导出的变量在当前shell中没有生效。您需要它在当前shell中source它才能生效，

source ~/.bashrc

或者更简单的说

. ~/.bashrc

将所有新的环境变量导入到现有会话中。您不必在以后的会话中这样做，因为在启动时打开的每一次新会话都会用到这些内容。

Answer 2

源~/..bashrc应用于使包路径有效

Answer 3

如果添加了路径并将其写入.bashrc，则可以：

运行脚本:如另一个答案所说的源~/..bashrc；

或者重新打开终止程序，下次每次打开终端时，脚本都会自动运行。