CONFIG_CLASSIC32 is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
default or selected kernelversion does not have config value CONFIG_CLASSIC32.
Result is shown for kernelversion 5.3.7

CONFIG_CLASSIC32 (not configurable)

configname: CONFIG_CLASSIC32

Linux Kernel Configuration
└─>Platform support
└─>CLASSIC32
In linux kernel since version 2.6.16 (release Date: 2006-03-19)