bitbake always reparses when using mutlilib with any fsl machine from this layer

[kraj]

I am seeing a peculiar issue which was seen in FSL based SOMs layers e.g. meta-variscite which is actually reproducible with just machines from meta-freescale and poky.

Here is my bblayers.conf

# POKY_BBLAYERS_CONF_VERSION is increased each time build/conf/bblayers.conf
# changes incompatibly
POKY_BBLAYERS_CONF_VERSION = "2"

BBPATH = "${TOPDIR}"
BBFILES ?= ""

BBLAYERS ?= " \
  /mnt/b/yoe/master/sources/poky/meta \
  /mnt/b/yoe/master/sources/poky/meta-poky \
  /mnt/b/yoe/master/sources/meta-freescale \
  "

and in local.conf append

MACHINE = "imx8mn-ddr4-evk"
# multilib
require conf/multilib.conf
MULTILIBS = "multilib:lib32"
DEFAULTTUNE:virtclass-multilib-lib32 = "armv7athf-neon"

then run

bitbake core-image-minimal -p

First time parsing is understandable but it keeps reparsing everytime the above command is run
and there are no changes at all in the metadata.

If I set MACHINE = "qemuarm64"

then the problem goes away.

[kraj]

Following change to comment preferrred providers fixes the problem

diff --git a/conf/machine/include/imx-base.inc b/conf/machine/include/imx-base.inc
index 3ddd498f..e2aa104d 100644
--- a/conf/machine/include/imx-base.inc
+++ b/conf/machine/include/imx-base.inc
@@ -540,11 +540,11 @@ PREFERRED_PROVIDER_virtual/libgl    ?= "mesa"
 PREFERRED_PROVIDER_virtual/libgles1 ?= "mesa"
 PREFERRED_PROVIDER_virtual/libgles2 ?= "mesa"

-PREFERRED_PROVIDER_virtual/egl:imxgpu        ?= "imx-gpu-viv"
-PREFERRED_PROVIDER_virtual/libgl:imxgpu3d    ?= "imx-gpu-viv"
-PREFERRED_PROVIDER_virtual/libgles1:imxgpu3d ?= "imx-gpu-viv"
-PREFERRED_PROVIDER_virtual/libgles2:imxgpu3d ?= "imx-gpu-viv"
-PREFERRED_PROVIDER_virtual/libgles3:imxgpu3d ?= "imx-gpu-viv"
+#PREFERRED_PROVIDER_virtual/egl:imxgpu        ?= "imx-gpu-viv"
+#PREFERRED_PROVIDER_virtual/libgl:imxgpu3d    ?= "imx-gpu-viv"
+#PREFERRED_PROVIDER_virtual/libgles1:imxgpu3d ?= "imx-gpu-viv"
+#PREFERRED_PROVIDER_virtual/libgles2:imxgpu3d ?= "imx-gpu-viv"
+#PREFERRED_PROVIDER_virtual/libgles3:imxgpu3d ?= "imx-gpu-viv"
 PREFERRED_PROVIDER_virtual/libg2d            ?= "imx-gpu-g2d"
 PREFERRED_PROVIDER_virtual/libg2d:imxdpu     ?= "imx-dpu-g2d"
 PREFERRED_PROVIDER_virtual/libg2d:mx93-nxp-bsp ?= "imx-pxp-g2d"