I'm using Buildroot to create a Linux system for the NXP LPC3250 microcontroller.

There are patches to the vanilla kernel to make it compatible with the LPC3250 controller: http://git.lpclinux.com/

I would like to build Kernel, but my Buildroot system always makes a 2.6.34 kernel!

I have set the GIT repository to point to enter image description here

You can see that I've specified a Defconfig for the system I'm building for: ea3250

I've edited my ea3250 defconfig as well: enter image description here

After doing a make clean all to clean everything and rebuild the system, looking inside the output kernel image shows it is still building 2.6.34: enter image description here

What am I doing wrong? Is there another menu I need to configure to get it to build

  • What buildroot version did you install?
    – jippie
    Commented Dec 21, 2012 at 19:30
  • I had some unstable version, I guess. Didn't really pay attention, just pulled down a copy from CVS. I ended up getting version 2012.11 and everything builds fine!
    – dext0rb
    Commented Dec 22, 2012 at 16:33

1 Answer 1


Not really an answer, but it doesn't fit a comment due to formatting:

What happens when you do the following:

cd /home/user/projects/buildroot
make clean
make distclean

Copy target system's /proc/config.gz to host /tmp Then take the existing kernel config and translates it to the new kernel version by answering the various question:

gunzip -c /tmp/config.gz ./.config
make oldconfig     

Do some sanity checking on version:

make menuconfig

Build the binaries


Check version of the kernel image built, don't load the kernel image in nano to search for a string, that is bad practice.

file ./buildroot/output/images/*
  • Thanks, your comment on version helped me, so I will just accept this. :)
    – dext0rb
    Commented Dec 22, 2012 at 16:34

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