CONFIG_ARM26 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm26
default or selected kernelversion does not have config value CONFIG_ARM26.
Result is shown for kernelversion 5.4.123

CONFIG_ARM26 (not configurable)

configname: CONFIG_ARM26

Linux Kernel Configuration
└─>ARM26
In linux kernel since version 2.6.12