[yocto] Question / issue

[Richard Purdie]

On Mon, 2014-05-12 at 23:31 +0000, Paul McGougan wrote:
> > -----Original Message-----
> > From: David Nyström [mailto:david.c.nystrom at gmail.com]
>  
> > To me, Thats sound like a bug in the dependency parser.
> > It should not parse for changes in comments, i.e. in this case do_install_append
> > comments.
> > 
> > Or perhaps in variable expansion, which could be avoided in commented
> > sections.
>
> Yes, I agree that the dependency parser should be altered.
> 
> I would suggest your 2nd suggestion would be the most appropriate, i.e. do not perform variable expansion in commented lines.

Its easy to think that at a first glance.

What if the variable being expanded expands to something multiline and
some of those lines are not comments though?

Bitbake's behaviour has always been to expand variables first, then
follow with other things like execution. The dependency parsing follows
the behaviour and includes them as dependencies because of the above
multiline issue.

So rightly or wrongly, the code does at least behave consistently at the
moment and its not as easy to change as you'd first think.

I make no claims about whether multiline expansion is a good thing, just
that these issues are there and that they're hard to change as the
impact isn't always as you'd expect. The behaviour has been like this
for a long time too.

Cheers,

Richard