CONFIG_SYS_SUPPORTS_BIG_ENDIAN is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
CONFIG_SYS_SUPPORTS_BIG_ENDIAN (not configurable)
configname: CONFIG_SYS_SUPPORTS_BIG_ENDIAN
Linux/MIPS Kernel Configuration
└─>SYS_SUPPORTS_BIG_ENDIAN