Orange Pi RK3399 questions

gounthar

After reading this excellent blog post by Dieter Reuter, I said to myself that compiling the kernel on this very same board could be a good idea.
I cloned the kernel:

1. git clone   https://github.com/orangepi-xunlong/OrangePiRK3399_kernel.git

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Unfortunately,

1. zcat /proc/config.gz > .config

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does not work.

1.     1. /proc/config.gz
   
2.     2. /boot/config
   
3.     3. /boot/config-$(uname -r)

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do not work either, I suspect the config extension have not been built for this kernel.

1. sudo modprobe configs
   
2. modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/4.4.103/modules.dep.bin'
   
3. modprobe: FATAL: Module configs not found in directory /lib/modules/4.4.103

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Then, I thought I could get the configuration from the kernel image file.
It was nowhere to be found...

So, I unzipped the img I flashed on the device on a X86 Linux machine, mounted the boot img

1. sudo mount -t msdos -o loop boot.img /mnt/firmware/
   
2. gounthar@maurice:~/Desktop/rk-linux/out$ ll /mnt/firmware/
   
3. total 19212
   
4. drwxr-xr-x 3 root root    16384 janv.  1  1970 ./
   
5. drwxr-xr-x 3 root root     4096 mai    2 16:22 ../
   
6. drwxr-xr-x 2 root root     2048 oct.  16  2018 extlinux/
   
7. -rwxr-xr-x 1 root root 19568648 oct.  16  2018 image*
   
8. -rwxr-xr-x 1 root root    78885 oct.  16  2018 rk3399~1.dtb*

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and it does not work

1. /usr/src/linux-headers-4.18.0-17/scripts/extract-ikconfig /mnt/firmware/image >config
   
2. extract-ikconfig: Cannot find kernel config.

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The file command says image is just data. Could it be linked that I'm doing that on a X86 machine?
I then transfered the image file to the RK3399 to see if I have a different result:

1. root@linaro-alip:/home/linaro/OrangePiRK3399_kernel# file /tmp/image
   
2. /tmp/image: data
   
3. root@linaro-alip:/home/linaro/OrangePiRK3399_kernel# ./scripts/extract-ikconfig /tmp/image
   
4. extract-ikconfig: Cannot find kernel config.
   

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