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I try to compile Linux kernel 6.8.12 on Ubuntu 24.04. I installed required package to compile, unzipped the tar file from kernel.org and took a config file from /boot to execute make menuconfig to produce my .config. Then, I did make -j4; on

CC [M]  kernel/kheaders.o,

I got that:

make[1]: *** [/home/lemste/depotgit/ubuntu_kernel/linux-6.8.12/Makefile:1921 : .] Erreur 2
make: *** [Makefile:240 : __sub-make] Erreur 2

I did the same on a linux-6.12.32 kernel, always on Ubuntu, I got the same; BUT on Debian 12 with linux-6.12.30 kernel, I managed to build the kernel and to install it.

Is there a special step I have to do with Ubuntu in order to compile successfully the kernel (like replace Ubuntu by Debian)?

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    "Error 2' is ENOENT No such file or directory. Did you read README*? Did you ./Configure or make menuconfig first? Have you sudo apt install build-essential? Commented Jun 6, 2025 at 23:27
  • I did make menuconfig. I installed build-essential. I have now to read REAME and tell Ubuntu I read them... Commented Jun 7, 2025 at 23:19
  • Btw I did the compile on Debian and it worked. Maybe README will tell me Ubuntu is so much different. Commented Jun 7, 2025 at 23:21

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I got my answer. I had to generate a key and then specify it in the .config file - or to disable the key. Here the url that helped me : https://stackoverflow.com/questions/67670169/compiling-kernel-gives-error-no-rule-to-make-target-debian-certs-debian-uefi-ce

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