Re: running "make dtbs" for test builds

From: Fengguang Wu
Date: Mon Jul 18 2016 - 08:30:00 EST

Hi Arnd,

On Mon, Jul 18, 2016 at 02:01:17PM +0200, Arnd Bergmann wrote:
Hi Fengguang,

I've recently run into a number of cases in which I pulled a branch that
was building fine with "make vmlinux", but that failed for "make dtbs",
and I wonder if this is something that could be checked by the kbuild
test robot so we catch it earlier.

Yes, sure.

There are parts of this:

- running "make" without a target will build the default image file
and also do the "dtbs" target on ARM and other architectures. I
don't know if this is what you do, or if you always build

My typical build command sequences are

make oldnoconfig
make prepare
make headers_install
make ARCH=xxx
make install

So it looks good already. :)

"make vmlinux ; make modules", which doesn't include it.
The dtbs makefile target is available on arc, arm, arm64, h8300,
metag, mips, nios2, and xtensa but not the others, so if you
call it explicitly, that has to be in an architecture specific

Got it.

- setting CONFIG_OF_ALL_DTBS will catch all files, not just the
ones that are built by default for the set of configurations you
have. It's possible to simply override this on the command line,
using "make CONFIG_OF_ALL_DTBS=y", it doesn't actually have to
be part of the configuration. The result is independent of the
actual configuration, so it should be enough to do this once
per architecture and source revision.

Is this something you can add?

Do you mean to simply change the main "make" command line to


Which looks safe even for ARCHs that do not support it.

The arch/.../Makefile that actually use it are: