buildroot for arm kernel defconfig

linux-kernel kernel arm cross-compiling buildroot
Gobliins picture Gobliins · Dec 2, 2010 · Viewed 23.8k times · Source

I am trying to build a buildroot with kernel image, and after doing make menuconfig and make, I am getting:

No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting

I can set a string to the defconfig, but I don't know what to put there.

My target system is an AT91SAM9RL board.

edit: I found out there are some pre-made config files to some devices, actually not exactly matching to my target.

Answer

pitti picture pitti · Dec 2, 2010

You can issue the default configuration process by running make xxx_defconfig and that make target is a file in the folder arch/arm/configs/. These default configurations are not designed to exactly fit your target, but are rather meant to be a superset so you only have to modify them a bit.

The make xxx_defconfig creates your initial .config, which you can now edit through make menuconfig and make your changes. After that, you can run make which will then compile the kernel using your settings.

Related questions

How does the linux kernel manage less than 1GB physical memory?

I'm learning the linux kernel internals and while reading "Understanding Linux Kernel", quite a few memory related questions struck me. One of them is, how the Linux kernel handles the memory mapping if the physical memory of say only 512 MB …

Read More
"FATAL: Module not found error" using modprobe

I have a problem with modprobe command... I compiled the hello world module and loaded it with insmod, it works fine and when I do lsmod, I can see it in the output list. But when I insert this module …

Read More
What is the difference between the kernel space and the user space?

What is the difference between the kernel space and the user space? Do kernel space, kernel threads, kernel processes and kernel stack mean the same thing? Also, why do we need this differentiation?

Read More