[Buildroot] Some analysis of the major build failure reasons

[Thomas Petazzoni]

Hello,

On Tue, 3 Aug 2021 12:04:13 +0200
Arnout Vandecappelle <arnout at mind.be> wrote:

>  A simpler solution is to use 'make -Orecurse' or 'make -Otarget'. That keeps
> the recursive output together.

True, but as you say below, it doesn't guarantee that the actual issue
appears in the last part of the build log.

>  It may not fully help due to the "Waiting for unfinished jobs" bit - the line
> with the failed package may appear just before that. But that can be solved by
> first searching the "Waiting for unfinished jobs" line and cutting off
> everything after it.

True. Needs some logic in extract_end_log() in autobuild-run.

So what should we do ? Build with -Otarget, and keep the last ~500
lines before the "Waiting for unfinished jobs" ?

>  Additional autobuilders do help because they offer a different build
> environment. If there's some autobuild failure that *doesn't* happen on James's
> machines, you can be sure that it's due to the build environment.

Absolutely true, that's a very good point that you have here.

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com