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Date: Fri, 05 Sep 2014 09:51:15 +0800
From: Dvorkin Dmitry <dvorkin@tibbo.com>
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To: yocto@yoctoproject.org
Subject: wrong automatic dependency
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Hello!

I wrote my own recipe for crda.
(http://wireless.kernel.org/en/developers/Regulatory/CRDA)

Dependencies is:
DEPENDS = "libgcrypt libnl"
RDEPENDS_${PN} = "udev wireless-regdb"

Crda Makefile is using python to rebuild it's database in 
build/installation step.
After installation I have several packages: crda itself, crda-dev, 
crda-doc, ... etc.
In my image I'm using only 'crda' package that doesn't need python.

But it seems Yocto detects python and add automatic dependency of python 
to my image anyway.

$ grep "crda" ./*.dot | grep pyt
./task-depends.dot:"crda.do_build" -> "python-dbus.do_package_write_ipk"
./task-depends.dot:"crda.do_build" -> "python.do_package_write_rpm"
./task-depends.dot:"crda.do_build" -> "python.do_package_write_deb"
./task-depends.dot:"crda.do_build" -> "python.do_package_write_ipk"
./task-depends.dot:"crda.do_build" -> 
"python-pygobject.do_package_write_rpm"
./task-depends.dot:"crda.do_build" -> 
"python-pygobject.do_package_write_deb"
./task-depends.dot:"crda.do_build" -> 
"python-pygobject.do_package_write_ipk"
./task-depends.dot:"crda.do_build" -> "python-dbus.do_package_write_rpm"
./task-depends.dot:"crda.do_build" -> "python-dbus.do_package_write_deb"

Is there any way to get rid of python dependency in this and only this 
recipe? it makes my image significally bigger.