[Buildroot] Building for ARM

Brian C. Lane bcl at brianlane.com
Sun Aug 13 18:03:11 UTC 2006

Hash: SHA1

Ed Swierk wrote:
> On 8/12/06, Brian C. Lane <bcl at brianlane.com> wrote:
>> 3. I added the buildroot tools to the beginning of the path and try to
>> compile the kernel with:
>> export PATH=../buildroot/build_armeb/staging_dir/bin:$PATH
>> make CROSS-COMPILE="armeb-linux-" ARCH="arm" bzImage


> Not sure if this is the cause of your problem, but adding a relative
> pathname to PATH doesn't seem like a good idea. Try
> PATH=$(pwd)/../buildroot/build_armeb/staging_dir/bin:$PATH instead.

Very good point. I've switched to using an absolute path.

>> Does anyone have any idea of what I'm doing wrong? I've also done a
>> bunch of googleing and haven't come up with a decent howto for building
>> a basic system (coverage of uclibc, busybox and buildroot are great, but
>> none seem to talk about the kernel).
> The various kernel makefiles under the targets directory are
> instructive; I created a fairly generic linux kernel makefile based on
> those. See the attached patch if you want to try it out for yourself.

Thanks for the patch -- After changing your ppc references to arm it
almost works :) It compiles most of the kernel without complaint but is
now stopping in rtc-lib.c with a complaint about cmpxchg:

drivers/built-in.o: In function `drm_lock_take':
rtc-lib.c:(.text+0x86920): undefined reference to `cmpxchg'
drivers/built-in.o: In function `drm_lock_free':

I probably don't have the kernel configured quite right.


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