kernelconfig_penguin
CONFIG_XTENSA_VARIANT_CUSTOM is not available for the default architecture x86.
Result is shown for architecture xtensa

Custom Xtensa processor configuration

configname: CONFIG_XTENSA_VARIANT_CUSTOM

Xtensa Processor Configuration
└─> Custom Xtensa processor configuration

Select this variant to use a custom Xtensa processor configuration.
You will be prompted for a processor variant CORENAME.