Hi Matt,

It looks like you're trying to build packages in a directory that you don't
have permission to do so in.

The .deb install of ROS puts pre-built packages in /opt/ros/cturtle/stacks.
If you are downloading sources for other packages, you will want to put them
in a directory that you have rwx permission in, and add that directory to
your ROS_PACKAGE_PATH.

Hope that helps,
Nate

On Sun, Nov 21, 2010 at 22:14, Matt McLellan <mattmclel@gmail.com> wrote:

> Hi,
>
> I'm getting the following error message when I try to compile a package
> that uses serial_port_node:
>
>  mkdir -p bin
>   cd build && cmake -Wdev -DCMAKE_TOOLCHAIN_FILE=`rospack find
> rosbuild`/rostoolchain.cmake  ..
>   [rosbuild] Building package serial_port_node
>   [rosbuild] Including /opt/ros/cturtle/ros/core/rospy/cmake/rospy.cmake
>   [rosbuild] Including /opt/ros/cturtle/ros/core/roscpp/cmake/roscpp.cmake
>   [rosbuild] Including
> /opt/ros/cturtle/ros/core/roslisp/cmake/roslisp.cmake
>   [rosbuild] Error from calling to Python to set the mtime on
> /opt/ros/cturtle/stacks/siue-ros-pkg/siue_utils/serial_port_node/srv_gen/generated:
>
>   CMake Error at /opt/ros/cturtle/ros/core/rosbuild/public.cmake:758
> (message):
>     [rosbuild] Failed to set mtime; aborting
>   Call Stack (most recent call first):
>     CMakeLists.txt:20 (rosbuild_gensrv)
>
>
>   -- Configuring incomplete, errors occurred!
>   CMake Error: Unable to open cache file for save.
> /opt/ros/cturtle/stacks/siue-ros-pkg/siue_utils/serial_port_node/build/CMakeCache.txt
>   CMake Error: : System Error: Permission denied
>
>
> I'm using cturtle with the serial_port_node package, output from 'uname
> -a': Linux robot-brain 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:26:08
> UTC 2010 i686 GNU/Linux
>
> _______________________________________________
> ros-users mailing list
> ros-users@code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users
>
>