classes/multilib: ensure MLPREFIX is set for image recipes

We need MLPREFIX to be set so that oe.utils.prune_suffix() (as used for
the value of BPN) can derive the bare name from the multilib-extended
name for image recipes. BPN being set correctly avoids missing file
warnings during parse from the file checksum code for (unusual) images
that set SRC_URI, such as build-appliance-image.

First half of the fix for [YOCTO #3146].

(From OE-Core rev: ddec9a1b45159c75e97e92abe9a940268acd84b2)

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

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/classes/multilib.bbclass b/meta/classes/multilib.bbclass
index b1a593e222..4d3f889931 100644
--- a/meta/classes/multilib.bbclass
+++ b/meta/classes/multilib.bbclass
@@ -12,6 +12,7 @@ python multilib_virtclass_handler () {
         raise bb.parse.SkipPackage("We shouldn't have multilib variants for the kernel")
 
     if bb.data.inherits_class('image', e.data):
+        e.data.setVar("MLPREFIX", variant + "-")
         e.data.setVar("PN", variant + "-" + e.data.getVar("PN", False))
         return