[OE-core] can one add a "packagegroup" simply by adding the recipe file for it?

[Robert P. J. Day]

  just to make sure i'm not missing anything subtle, i know you can
add a "packagegroup" to your build using IMAGE_FEATURES, but given
that there are *lots* more packagegroup recipe files in oe-core than
have corresponding PACKAGE_GROUP_* definitions in core-image.bbclass:

$ find . -name "packagegroup*bb"
./recipes-gnome/packagegroups/packagegroup-core-standalone-gmae-sdk-target.bb
./recipes-gnome/packagegroups/packagegroup-toolset-native.bb
./recipes-gnome/packagegroups/packagegroup-core-sdk-gmae.bb
./recipes-devtools/packagegroups/packagegroup-core-device-devel.bb
./recipes-core/packagegroups/packagegroup-cross-canadian.bb
./recipes-core/packagegroups/packagegroup-core-sdk.bb
./recipes-core/packagegroups/packagegroup-core-ssh-openssh.bb
./recipes-core/packagegroups/packagegroup-core-standalone-sdk-target.bb
./recipes-core/packagegroups/packagegroup-core-boot.bb
./recipes-core/packagegroups/packagegroup-core-tools-profile.bb
./recipes-core/packagegroups/packagegroup-self-hosted.bb
./recipes-core/packagegroups/packagegroup-core-ssh-dropbear.bb
./recipes-core/packagegroups/packagegroup-core-tools-debug.bb
./recipes-core/packagegroups/packagegroup-core-buildessential.bb
./recipes-core/packagegroups/packagegroup-core-tools-testapps.bb
./recipes-core/packagegroups/packagegroup-base.bb
./recipes-core/packagegroups/packagegroup-core-nfs.bb
./recipes-core/packagegroups/packagegroup-core-eclipse-debug.bb
./recipes-graphics/packagegroups/packagegroup-core-x11.bb
./recipes-graphics/packagegroups/packagegroup-core-x11-base.bb
./recipes-graphics/packagegroups/packagegroup-core-x11-xserver.bb
./recipes-graphics/packagegroups/packagegroup-core-clutter.bb
./recipes-graphics/packagegroups/packagegroup-core-directfb.bb
./recipes-qt/packagegroups/packagegroup-qte-toolchain-target.bb
./recipes-qt/packagegroups/packagegroup-core-qt4e.bb
./recipes-qt/packagegroups/packagegroup-qt-toolchain-target.bb
./recipes-qt/packagegroups/packagegroup-core-qt.bb
./recipes-sato/packagegroups/packagegroup-core-x11-sato.bb
./recipes-extended/packagegroups/packagegroup-core-lsb.bb
./recipes-extended/packagegroups/packagegroup-core-basic.bb
$

is it accurate to say that you can just as equivalently add the recipe
file directly using, say, CORE_IMAGE_EXTRA_INSTALL? is there any
functional difference between those two approaches?

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================