Currently DTC_FLAGS kernel makefile parameter can be specified directly on the
command line by adding it to KERNEL_EXTRA_ARGS. However, this prevents
scripts/Makefile.lib logic from appending flags that silence dtc warnings (all
assignments done from within a makefile, to a variable specified on the command
line, are ignored).
Because of this, the do_compile log is cluttered with dtc warnings that should
only be printed when compiling with W="123":
...
/soc: node has a reg or ranges property, but no unit name
/soc/gpu: missing or empty reg/ranges property
/soc/firmware/gpio: missing or empty reg/ranges property
...
To fix this, introduce the dedicated KERNEL_DTC_FLAGS variable to hold
dtc flags and export DTC_FLAGS in the environment before generating the dtbs
(make allows "+=" operations on variables that come from the environment, so
the warnings are silenced properly).
Signed-off-by: Ovidiu Panait <ovidiu.pan...@windriver.com>
---
v2 updates:
- Rename KERNEL_DEVICETREE_FLAGS -> KERNEL_DTC_FLAGS
- Use "-n <var>" instead of "! -z <var>" inside if test
meta/classes/kernel-devicetree.bbclass | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/meta/classes/kernel-devicetree.bbclass
b/meta/classes/kernel-devicetree.bbclass
index 81dda8003f..d4f8864200 100644
--- a/meta/classes/kernel-devicetree.bbclass
+++ b/meta/classes/kernel-devicetree.bbclass
@@ -9,6 +9,9 @@ FILES_${KERNEL_PACKAGE_NAME}-image-zimage-bundle =
"/${KERNEL_IMAGEDEST}/zImage-
# Generate kernel+devicetree bundle
KERNEL_DEVICETREE_BUNDLE ?= "0"
+# dtc flags passed via DTC_FLAGS env variable
+KERNEL_DTC_FLAGS ?= ""
+
normalize_dtb () {
dtb="$1"
if echo $dtb | grep -q '/dts/'; then
@@ -50,6 +53,10 @@ do_configure_append() {
}
do_compile_append() {
+ if [ -n "${KERNEL_DTC_FLAGS}" ]; then
+ export DTC_FLAGS="${KERNEL_DTC_FLAGS}"
+ fi
+
for dtbf in ${KERNEL_DEVICETREE}; do
dtb=`normalize_dtb "$dtbf"`
oe_runmake $dtb CC="${KERNEL_CC} $cc_extra " LD="${KERNEL_LD}"
${KERNEL_EXTRA_ARGS}
--
2.17.1
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