[poky] how to detect unstable builds

[Richard Purdie]

On Wed, 2014-07-30 at 14:10 +0000, Andreas Schultz wrote:
> Hi,
> 
> Unstable might be not the right term, but I couldn't think of another.
> 
> The issue is that two builds on exactly the same build host, produce
> packages that have different runtime dependencies and also different
> behaviors.
> 
> I encountered this problem with readline, but other package might have
> it as well.
> 
> I try to build an image that contains systemd and (an modified) bind. The
> declared dependencies of systemd contain readline, those of my version of
> bind do not. With multiple parallel task, build order is not guaranteed
> and bind might be build before or after readline.
> 
> bind's autoconf does check for readline and will link bind to it if
> it finds it.
> 
> The outcome is that some builds contain a bind linked against readline,
> while other contain a bind that is not linked against readline.
> 
> ** QA hell breaks loose **
> 
> Is there a way to detect and/or prevent situations like this?

If linkage to a library that is not in DEPENDS happens, there is new
code which should detect this:

http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=a202f8a66383787c899246c5fa14c862e5d7647d

Its not perfect but it should be better than we've ever had before and
is a start...

Cheers,

Richard