Re: running "make dtbs" for test builds

[Fengguang Wu]

On Mon, Jul 18, 2016 at 02:52:32PM +0200, Arnd Bergmann wrote:
> On Monday, July 18, 2016 8:41:22 PM CEST Fengguang Wu wrote:
> > 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.
> >
> > We initially run "make" without vmlinux, however during bisect more
> > specific make targets will be used to speed it up. To do that it's
> > necessary to know the regex patterns of "make dtbs" error messages,
> > so that they can be correctly bisected.
> >
> > Can you give some "make dtbs" error messages or patterns?
>
> A typical error looks like
>
> Error: arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts:252.1-18 Label or path usb_power_supply not found
> FATAL ERROR: Syntax error parsing input tree
> scripts/Makefile.lib:312: recipe for target 'arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dtb' failed
> make[3]: *** [arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dtb] Error 1
>
> There should be almost 100% correlation between seeing "arch/${ARCH}/boot/dts/"
> in stderr and having a problem in the "make dtbs" stage.

Got it, thank you for the tips!

Regards,
Fengguang