[OE-core] --conf Was: Features in Yocto Project 1.7

[Trevor Woerner]

On 03/25/14 01:50, Martin Jansa wrote:
> Can you show some example of config you need to have wor wayland and
> cannot have for core-image-minimal? 

Okay, good point. I should have thought harder to come up with a better
example :-) It's funny, actually, that you're the one pressing me on
this, I first encountered this issue and started thinking about it while
trying to reproduce your "State of bitbake world" tests :-)

Let's say you're a board maintainer; some people want to run gstreamer,
some people want to try out systemd, some want to run wayland. Each of
these requires tweaks to a conf/local.conf, no? I'm constantly changing
my set of IMAGE_INSTALL_append's, fiddling with preferred versions, and
distro features.

If I'm just doing a one-off build then sure, adjust conf/local.conf
manually. But if I'm perpetually rotating between a bunch of tests as
repositories are modified, it would be easier to just specify which
configuration I want from the bitbake cmdline.

As I mentioned, maybe I'm doing things wrong? Maybe others have separate
build locations, or maybe others define their own images which
incorporate these adjustments? But I'd be quite surprised to find I'm
the only one having to edit conf/local.conf to comment/un-comment blocks
before every build.

As a concrete example, currently I'm flipping between dora and master
builds. For some reason I can't seem to reuse the same TMPDIR between
them. So every time I "repo init -b <newbranch>" I then also have to
edit conf/local.conf before bitbaking.