[Buildroot] Please help me on kernel configuration with rt-patch applied

[Pampolini Matteo]

Hello,


I'm facing a strange issue on kernel configuration with rt-patch applied.


I'm using buildroot-2020.02.8 with kernel 5.4.78 and rt-patch 5.4.78-rt44, patch is applied through BR2_GLOBAL_PATCH_DIR variable and custom kernel configuration that takes it into account is passed through BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE variable.


Patch is correctly applied and above configuration file is copied into kernel build directory. However after this the following message is displayed:


Using /home/user/buildroot-2020.02.8/output/build/linux-5.4.78/.config as base
#
# merged configuration written to /home/user/buildroot-2020.02.8/output/build/linux-5.4.78/.config (needs make)
#
scripts/kconfig/conf  --olddefconfig Kconfig
#

And then my custom configuration is overwritten and rt-patch config variables are not present anymore in actual kernel .config file.

I also tried with BR2_LINUX_KERNEL_PATCH variable, but the result is the same.

May you please help me? I've used BR2_GLOBAL_PATCH_DIR variable to apply other kernel patches since now without any problems.

Thanks, Matteo



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