On 2/24/12 7:49 AM, Andreas Oberritter wrote:
On 24.02.2012 13:55, Richard Purdie wrote:
Someone recently asked me about using external source trees with
OE-Core. I was aware of srctree.bbclass in OE-Classic and did start
looking at it but it has various elements I wasn't so keen on. I
therefore wondered if I could improve upon it. I did start from that
code base but came up with:
http://git.yoctoproject.org/cgit.cgi/poky-contrib/commit/?h=rpurdie/a0&id=ac8a54c18c33aaab6758c34a3d6093d3d3384cee
[patch inline below]
which I've called externalsrc.bbclass since it behaves a bit
differently. In particular, all the usual task targets are available.
As an example usage with the above patch applied:
cd ~
tar -xvzf $DL_DIR/libfm-0.1.17.tar.gz
(creates libfm-0.1.17 in my homedir)
edit libfm_0.1.17.bb and add:
inherit externalsrc
S = "/home/richard/libfm-0.1.17"
Do I need to edit libfm_0.1.17.bb in-place, or can it be stored outside
my layers to be built with bitbake -b, for example?
You should be able to add a bbappend for this item, in a custom development
layer and not modify the original .bb. It will still require the two line
configuration change (and a custom layer configuration... but I recommend that
anyway.)
Does S need to contain an absolute path, or could it be set to a path
relative to the location of the recipe?
I don't know for this development.... but relative can get very messy,
especially when all of the project, work dir, etc can be overridden to create a
custom environment for someone. Enforcing an absolute path isn't a bad idea here.
It would be nice if it was possible to include bitbake recipes in the
source trees of my projects, which "just work".
Might be possible in something like base.bbclass to add the inherit if a value
is set.. then in local.conf you could do something like:
EXTERNALSRC_libfm = "/home/richard/libfm-0.1.17"
And if it's set, the class could do the reset? That would certainly be easier
then a layer.
--Mark
I think this was possible with srctree.bbclass, though I never had it
working reliably. I think bitbake -cclean always raised errors.
Regards,
Andreas
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