make -j4 problem jetson TX2 make: *** No targets specified and no makefile found. Stop.

I downloaded JetPack-L4T-3.2-linux-x64_b157.run and installed jetson tx2. Ok.
first of all
I opened python2.7 later import cv2
but it didn t import cv2
I wrote terminal
sudo apt-get install python-dev python-pip sudo -H pip install numpy
and python2.7 did import cv2

but
I want to use python3 with opencv3.3
python3.5 didn t import cv2

I try JK Jung’s blog page
https://jkjung-avt.github.io/opencv3-on-tx2/
when I wrote promt line $ make -j4
it gives me “make: *** No targets specified and no makefile found. Stop.”

and later I try these are
https://www.youtube.com/watch?v=GlDjscSAtDY

https://github.com/jetsonhacks/buildOpenCVTX2
http://www.jetsonhacks.com/2017/04/05/build-opencv-nvidia-jetson-tx2/
it is ok
there isn t any problem

sudo make install work here but python3.5 can not import cv2 again I try ccmake .
and I changed -DBUILD_opencv_python3=OFF with -DBUILD_opencv_python3=ON
and it didn t import cv2
and later

I try JK Jung’s blog page again
https://jkjung-avt.github.io/opencv3-on-tx2/
it gives me again
“make: *** No targets specified and no makefile found. Stop.”
please help me

Other users also have one topic. Please refer.
https://devtalk.nvidia.com/default/topic/1026044/jetson-tx2/newbie-question-how-to-install-opencv-and-setup-the-path-/post/5221560/

Dear WayneWWW

I asked
$ sudo make install
doesn t work

I tried it “https://devtalk.nvidia.com/default/topic/1026044/jetson-tx2/newbie-question-how-to-install-opencv-and-setup-the-path-/post/5221560/” before

I want to work
When I try JK Jung’s blog page again Installation Steps
https://jkjung-avt.github.io/opencv3-on-tx2/
make -j4 gives me error sudo make install
doesn t work

Dear WayneWWW

I asked
$ sudo make install
doesn t work

I tried it “https://devtalk.nvidia.com/default/topic/1026044/jetson-tx2/newbie-question-how-to-install-opencv-and-setup-the-path-/post/5221560/” before

I want to work
When I try JK Jung’s blog page again Installation Steps

https://jkjung-avt.github.io/opencv3-on-tx2/

make -j4 gives me error sudo make install
doesn t work

Your error merely shows that there is no Makefile under your directory…

I did jk junks instructions JetPack-3.1
It worked fine
https://jkjung-avt.github.io/opencv3-on-tx2/
and two weeks later I installed JetPack-3.2
I did same instructions
$ make -j4
It doesn t work