CONFIG_ARCH_MULTIPLATFORM is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Allow multiple platforms to be selected
configname: CONFIG_ARCH_MULTIPLATFORM
ARM system type
└─>Allow multiple platforms to be selected
In linux kernel since version 3.1 (release Date: 2011-10-24)
selects
CONFIG_ARCH_WANT_OPTIONAL_GPIOLIBCONFIG_ARM_HAS_SG_CHAIN
CONFIG_ARM_PATCH_PHYS_VIRT
CONFIG_AUTO_ZRELADDR
CONFIG_CLKSRC_OF
CONFIG_COMMON_CLK
CONFIG_GENERIC_CLOCKEVENTS
CONFIG_MIGHT_HAVE_PCI
CONFIG_MULTI_IRQ_HANDLER
CONFIG_SPARSE_IRQ
CONFIG_USE_OF