packagegroup-core-lsb: avoid rebuilding when changing layer config

It's regrettable that code in here is referring to BBFILE_COLLECTIONS,
but it is, and the result is that this packagegroup will rebuild simply
by adding or removing a layer which may be completely unrelated to
whether you've got meta-qt4 or not. Add BBFILE_COLLECTIONS to
vardepsexclude for the function to avoid this. (This was flagged up when
testing the new yocto-compat-layer script - it understandably but
undesirably reports it as a change caused by a layer).

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/meta/recipes-extended/packagegroups/packagegroup-core-lsb.bb b/meta/recipes-extended/packagegroups/packagegroup-core-lsb.bb
index 3aedf6b7a5..a156bcb95c 100644
--- a/meta/recipes-extended/packagegroups/packagegroup-core-lsb.bb
+++ b/meta/recipes-extended/packagegroups/packagegroup-core-lsb.bb
@@ -225,6 +225,8 @@ def get_libqt4(d):
                 'libraries. Its intended use is for passing LSB tests as Qt4 is ' \
                 'a requirement for LSB.')
     return ''
+# We don't want this to rebuild every time you change your layer config
+get_libqt4[vardepsexclude] += "BBFILE_COLLECTIONS"
 
 SUMMARY_packagegroup-core-lsb-desktop = "LSB Desktop"
 DESCRIPTION_packagegroup-core-lsb-desktop = "Packages required to support libraries \