Jetson Nano Kernel Problem

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

I am having a problem compiling the latest kernel for Jetson Nano. I followed the guide here: Kernel Customization — Jetson Linux<br/>Developer Guide 34.1 documentation

I manually downloaded and extracted the kernel sources, then tried to build the kernel using the steps in that guide. I am using the latest Linux toolchain files from here: Welcome — Jetson Linux<br/>Developer Guide 34.1 documentation

The kernel stops compiling mid way through with these errors:
…
…
CC [M] drivers/net/wireless/realtek/rtl8821cu/hal/phydm/halrf/halrf_kfree.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/hal/phydm/rtl8821c/phydm_regconfig8821c.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/platform/platform_ops.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/hal/phydm/halrf/rtl8821c/halrf_8821c.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/hal/phydm/rtl8821c/phydm_hal_api8821c.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/hal/phydm/halrf/rtl8821c/halhwimg8821c_rf.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/hal/btc/halbtc8821cwifionly.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/hal/phydm/halrf/rtl8821c/halrf_iqk_8821c.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/core/rtw_mp.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/hal/btc/halbtc8821c1ant.o
CC [M] drivers/net/wireless/realtek/rtl8821cu/hal/btc/halbtc8821c2ant.o
LD [M] drivers/net/wireless/realtek/rtl8821cu/rtl8821cu.o
scripts/Makefile.build:649: recipe for target ‘drivers/net/wireless’ failed
make[2]: *** [drivers/net/wireless] Error 2
scripts/Makefile.build:649: recipe for target ‘drivers/net’ failed
make[1]: *** [drivers/net] Error 2
Makefile:1122: recipe for target ‘drivers’ failed
make: *** [drivers] Error 2

I have not touched these files so not sure what is going on here. Can you help?

Best Regards,
Casey

2

Jetpack 34.x doesn’t compatibility with jetson nano you needed jetpack 32.x branch .Jetson Linux Archive | NVIDIA Developer
Recommended using GCC7 for this branch .

1 Like
3

Hello,

Ok I have tried going with 32.7.2 now and Linaro 7.3.1 2018.05 toolchain (following the steps here: https://docs.nvidia.com/jetson/archives/l4t-archived/l4t-3261/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/kernel_custom.html#

But now I am getting the following problem during the build:

labuser@Linux01:~/Downloads/public_sources/Linux_for_Tegra/source/public/kernel_src/kernel/kernel-4.9$ TEGRA_KERNEL_OUT=kernel_out
labuser@Linux01:~/Downloads/public_sources/Linux_for_Tegra/source/public/kernel_src/kernel/kernel-4.9$ export CROSS_COMPILE=$HOME/l4t-gcc/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-
labuser@Linux01:~/Downloads/public_sources/Linux_for_Tegra/source/public/kernel_src/kernel/kernel-4.9$ export LOCALVERSION=-tegra
labuser@Linux01:~/Downloads/public_sources/Linux_for_Tegra/source/public/kernel_src/kernel/kernel-4.9$ mkdir -p $TEGRA_KERNEL_OUT
labuser@Linux01:~/Downloads/public_sources/Linux_for_Tegra/source/public/kernel_src/kernel/kernel-4.9$ make ARCH=arm64 0=$TEGRA_KERNEL_OUT tegra_defconfig

configuration written to .config

labuser@Linux01:~/Downloads/public_sources/Linux_for_Tegra/source/public/kernel_src/kernel/kernel-4.9$ make ARCH=arm64 O=$TEGRA_KERNEL_OUT -j4
make[1]: Entering directory ‘/home/labuser/Downloads/public_sources/Linux_for_Tegra/source/public/kernel_src/kernel/kernel-4.9/kernel_out’
GEN ./Makefile
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
HOSTCC scripts/kconfig/zconf.tab.o
HOSTLD scripts/kconfig/conf
scripts/kconfig/conf --silentoldconfig Kconfig

*** Configuration file “.config” not found!

*** Please run some configurator (e.g. “make oldconfig” or
*** “make menuconfig” or “make xconfig”).

…/scripts/kconfig/Makefile:37: recipe for target ‘silentoldconfig’ failed
make[3]: *** [silentoldconfig] Error 1
…/Makefile:575: recipe for target ‘silentoldconfig’ failed
make[2]: *** [silentoldconfig] Error 2
make[1]: *** No rule to make target ‘include/config/auto.conf’, needed by ‘include/config/kernel.release’. Stop.
make[1]: Leaving directory ‘/home/labuser/Downloads/public_sources/Linux_for_Tegra/source/public/kernel_src/kernel/kernel-4.9/kernel_out’
Makefile:171: recipe for target ‘sub-make’ failed
make: *** [sub-make] Error 2

Best Regards,
Casey

4

Seems the .config file was not created at the expected location, … or else.
You may try these steps for native building such as (this is already an old post, you would adapt for your L4T version):

5

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