KBUILD_DEFCONFIG_KMACHINE ?= defconfig_file does not work as I expected.
First lesson I learned: defconfig != .config
A new defconfig file below arch/arm/config/xy_defconfig created by make savedefconfig is not equal to the .config file. I assume the linux kernel expand some symbols and create the final .config.
Here comes the issue: yocto's in-tree defconfig only works with the full list of config symbols. The xy_defconfig below arch/arm/configs does not have all symbols. So the kernel is not as expected. Any suggestions if it is a bug or a feature? And how to force a make xy_defconfig before build?
Best, Frank
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