CONFIG_TOOLCHAIN_HAS_ZICBOM is not available for thedefaultarchitecture x86.
Result is shown for architecture riscv

CONFIG_TOOLCHAIN_HAS_ZICBOM (not configurable)

configname: CONFIG_TOOLCHAIN_HAS_ZICBOM

Linux Kernel Configuration
└─>Platform type
└─>TOOLCHAIN_HAS_ZICBOM
In linux kernel since version 6.0.2 (release Date: 2022-10-15)  
depends
CONFIG_LD_VERSIONCONFIG_23800 or CONFIG_LLD_VERSIONCONFIG_150000
CONFIG_cc-option or  NOT CONFIG_32BIT
CONFIG_cc-option or  NOT CONFIG_64BIT

is selected by
CONFIG_RISCV_ISA_ZICBOM