When Jetson Nano compiles with catkin_make, if the default is 4 threads (catkin_make -j4), internal compiler error is prone to occur. At this time, you can modify ~/.bashrc to change the number of threads compiled by the system to limit the maximum thread. Thus it compiles smoothly. Proceed as follows:
1. Open terminal

vim ~/.bashrc

2. Add the following command, n is the number of threads you want to set, for example, it is better to set it to 2 or less for Nano:

export ROS_PARALLEL_JOBS=-jn  # Nano n=2

3. Source it to take effect:

source ~/.bashrc

OK, you can experiment happily~