I have built ROS and the dependencies from source to cross-compile it for ARM architecture After build i run roscore and and get the after-mentioned error :

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... logging to /home/jetsonvvr/.ros/log/8a1c5b60-5304-11ea-9968-16206b226c05/roslaunch-jetsonvvr-desktop-16495.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://localhost:43919/
ros_comm version 1.14.3


SUMMARY
========

PARAMETERS
 * /rosdistro: melodic
 * /rosversion: 1.14.3

NODES

auto-starting new master
process[master]: started with pid [16506]
ROS_MASTER_URI=http://localhost:11311/

setting /run_id to 8a1c5b60-5304-11ea-9968-16206b226c05
RLException: Roslaunch got a 'No such file or directory' error while attempting to run:

/home/jetsonvvr/Desktop/ROS_ARM_CROSSCOMPILE/ros_melodic/devel/lib/rosout/rosout __name:=rosout __log:=/home/jetsonvvr/.ros/log/8a1c5b60-5304-11ea-9968-16206b226c05/rosout-1.log

Please make sure that all the executables in this command exist and have
executable permission. This is often caused by a bad launch-prefix.
The traceback for the exception was written to the log file
[rosout-1] process has died without exit code [pid -1, cmd /home/jetsonvvr/Desktop/ROS_ARM_CROSSCOMPILE/ros_melodic/devel/lib/rosout/rosout __name:=rosout __log:=/home/jetsonvvr/.ros/log/8a1c5b60-5304-11ea-9968-16206b226c05/rosout-1.log].
log file: /home/jetsonvvr/.ros/log/8a1c5b60-5304-11ea-9968-16206b226c05/rosout-1*.log
[rosout-1] restarting process
Traceback (most recent call last):
  File "/home/jetsonvvr/Desktop/ROS_ARM_CROSSCOMPILE/ros_melodic/src/ros_comm/roslaunch/src/roslaunch/pmon.py", line 620, in _run
    r.start()
  File "/home/jetsonvvr/Desktop/ROS_ARM_CROSSCOMPILE/ros_melodic/src/ros_comm/roslaunch/src/roslaunch/nodeprocess.py", line 322, in start
    executable permission. This is often caused by a bad launch-prefix."""%(e.strerror, ' '.join(self.args)))
FatalProcessLaunch: Roslaunch got a 'No such file or directory' error while attempting to run:

/home/jetsonvvr/Desktop/ROS_ARM_CROSSCOMPILE/ros_melodic/devel/lib/rosout/rosout __name:=rosout __log:=/home/jetsonvvr/.ros/log/8a1c5b60-5304-11ea-9968-16206b226c05/rosout-1.log

Please make sure that all the executables in this command exist and have
executable permission. This is often caused by a bad launch-prefix.
[rosout-1] killing on exit
[master] killing on exit

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The build it made in `/home/../Desktop/ROSARMCROSSCOMPILE/ros_melodic

No /opt/ros/melodic file is made.

I have given executable permission to all .py and .launch files

Bashrc:

export ROS_ROOT= /home/../Desktop/ROS_ARM_CROSSCOMPILE/ros_melodic
export ROS_HOSTNAME= localhost