[OE-core] [PATCH] qemu-native: depend on unfs-server-native

[Richard Purdie]

On Thu, 2012-05-03 at 13:39 +0200, Koen Kooi wrote:
> Op 3 mei 2012, om 13:24 heeft Richard Purdie het volgende geschreven:
> > The whole point with the qemu emulated machines is that you build them
> > and they work for new users easily and efficiently. I don't think
> > calling bitbake to build them and force the user into another wait is a
> > good usability model to be promoting.
> 
> OE-core should set the right example and teaching people that a global
> IMAGE_DEPENDS is OK is not the right example. Especially when it
> actually causes breakage, see below.
> If people insist that IMAGE_DEPENDS is the one and only way to provide
> the runqemu experience then at least put a big comment in the file
> saying why it's done and why people shouldn't be copy/pasting it into
> their layers.
> And an indiciation where the line is drawn would be nice as well, I
> can imagine that someone wants to add amazon EC2 support to runqemu
> and sends a patch to add the EC2 tools to IMAGE_DEPENDS.

I'm happy to see a comment. The line is quite clear, the documentation
associated with the qemu images, the quick start guide and other manuals
assume we build qemu-native and friends and for usability this is a
clear win. The manuals do not document EC2 and it is not something we
expect a new user to need to do easily. Running an extra "bitbake xxx"
or including an extra configuration file would be perfectly reasonable
for those usage scenarios.

> > I'm also slightly bemused that in previous discussions you've implied
> > build time is less relevant then functionality yet here you're taking
> > the opposite stance :).
> 
> I get build *failures* for the qemu machines because I don't have mesa
> and sdl installed on the autobuilder. But you are right, I do think
> build time is less relevant than functionality.

We should also consider setting up PACKAGECONFIG options in the qemu
recipe for these things so you can specify to build qemu-native without
sdl/gl easily. I appreciate that is going to be pretty nasty
implementation wise but I think it would help and in fact if someone
files the bug I'll mark it as a P1 for 1.3 since that does help
usability a lot.

Cheers,

Richard