Hi,
I'm trying to debug an issue which seems to be caused by the order of prepend
operations from bbappends with anonymous python functions.
I'm using Xilinx Petalinux tools 2023.1 version which corresponds to Yocto
Langdale, but this feels like a generic bitbake/yocto question.
I have two layers both with device-tree.bbappend files, both of which set
FILESEXTRAPATHS:prepend, although sometimes through anonymous python functions.
I need my layer to apply the prepend last so we have the first entry in
FILESEXTRAPATHS and our version of a file is found.
The ultimate purpose of this is to find our version of the "config" file with
machine specific paths removed as it's stopping us from effectively sharing
sstate cache using a network file server.
The output from "bitbake-layers show-layers" shows that our layer has the
higher priority:
meta-xilinx-core
<...snip...>/components/yocto/layers/meta-xilinx/meta-xilinx-core 5
meta-datapath-esg <...snip...>/yocto/meta-datapath-esg 9
The meta-xilinx-core layer is a dynamic layer in Xilinx's meta-petalinux layer
and in the layer.conf has:
BBFILES_DYNAMIC += " \
<...snip...>
xilinx:${LAYERDIR}/dynamic-layers/xilinx-core/recipes-*/*/*.bb \
xilinx:${LAYERDIR}/dynamic-layers/xilinx-core/recipes-*/*/*.bbappend \
<...snip...>
"
But when looking at the FILESEXTRAPATHS variable with "bitbake-getvar -r
device-tree FILESEXTRAPATHS" I can see that the lower priorty Xilinx dynamic
layer is prepending last via the anonymous python functions so their version of
the file is being found first:
# $FILESEXTRAPATHS [17 operations]
# set? <...path...>/components/yocto/layers/poky/meta/conf/bitbake.conf:376
# "__default:"
# set
<...path...>/components/yocto/layers/poky/meta/conf/documentation.conf:176
# [doc] "Extends the search path the OpenEmbedded build system uses when
looking for files and patches as it processes recipes and append files."
<...snip...>
# :prepend
<...path...>/components/yocto/layers/meta-petalinux/dynamic-layers/xilinx-core/recipes-bsp/device-tree/device-tree.bbappend:3
#
"<...path...>/components/yocto/layers/meta-petalinux/dynamic-layers/xilinx-core/recipes-bsp/device-tree/files:"
<...snip...>
# :prepend <...source
path...>/yocto/meta-datapath-esg/recipes-bsp/device-tree/device-tree.bbappend:2
# "<...source
path...>/yocto/meta-datapath-esg/recipes-bsp/device-tree/files:"
# :prepend <...source
path...>/yocto/meta-datapath-esg/recipes-bsp/device-tree/device-tree.bbappend:11
# "<...source
path...>/yocto/meta-datapath-esg/recipes-bsp/device-tree/../../../bsps/dgc219:"
# :prepend <...source
path...>/yocto/meta-datapath-esg-dgc219/recipes-bsp/device-tree/device-tree.bbappend:7
# "<...source
path...>/yocto/meta-datapath-esg-dgc219/recipes-bsp/device-tree/files:"
# prepend device-tree.bbappend:14
[__anon_18__home_phil_build_dgc219_release_dgc219_components_yocto_layers_meta_petalinux_dynamic_layers_xilinx_core_recipes_bsp_device_tree_device_tree_bbappend]
# "<...path...>/project-spec/configs:"
# prepend device-tree.bbappend:16
[__anon_18__home_phil_build_dgc219_release_dgc219_components_yocto_layers_meta_petalinux_dynamic_layers_xilinx_core_recipes_bsp_device_tree_device_tree_bbappend]
#
"<...path...>/components/yocto/layers/meta-xilinx/meta-xilinx-core/gen-machine-conf/gen-machine-scripts:"
<...snip...>
The relevant operations in the Xilinx bbappend are:
FILESEXTRAPATHS:prepend := "${@'${THISDIR}/files:' \
if ((d.getVar('WITHIN_PLNX_FLOW') or '') != '' and \
not d.getVar("SYSTEM_DTFILE")) else ''}"
python () {
if d.getVar("CONFIG_DISABLE"):
d.setVarFlag("do_configure", "noexec", "1")
if d.getVar("WITHIN_PLNX_FLOW") and not d.getVar("SYSTEM_DTFILE"):
d.appendVar('SRC_URI', ' file://config file://system-user.dtsi')
sysconfig_dir = d.getVar('SYSCONFIG_DIR') or ''
plnx_scriptspath = d.getVar('PLNX_SCRIPTS_PATH') or ''
if sysconfig_dir:
d.prependVar('FILESEXTRAPATHS', '%s:' % sysconfig_dir)
if plnx_scriptspath:
d.prependVar('FILESEXTRAPATHS', '%s:' % plnx_scriptspath)
d.appendVar('SRC_URI', ' file://%s' % plnx_scriptspath)
}
Is this the expected ordering? (That prepends from anonymous python functions
d.prependVar() happen after VAR:prepend ignoring bbappend/layer
ordering/priority?
Is there a way I can ensure my prepend comes last without having to BBMASK out
the Xilinx bbappend and recreate/modify it's contents elsewhere?
Best Regards,
Phil Dawson
-=-=-=-=-=-=-=-=-=-=-=-
Links: You receive all messages sent to this group.
View/Reply Online (#63927): https://lists.yoctoproject.org/g/yocto/message/63927
Mute This Topic: https://lists.yoctoproject.org/mt/108776846/21656
Group Owner: yocto+ow...@lists.yoctoproject.org
Unsubscribe: https://lists.yoctoproject.org/g/yocto/unsub
[arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
