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