CONFIG_ARCH_RPC is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
RiscPC
configname: CONFIG_ARCH_RPC
ARM system type
└─>RiscPC
In linux kernel since version 2.6.12
On the Acorn Risc-PC, Linux can support the internal IDE disk and
CD-ROM interface, serial and parallel port, and the floppy drive.
CD-ROM interface, serial and parallel port, and the floppy drive.
selects
CONFIG_ARCH_ACORNCONFIG_ARCH_MAY_HAVE_PC_FDC
CONFIG_ARCH_SPARSEMEM_ENABLE
CONFIG_ARCH_USES_GETTIMEOFFSET
CONFIG_FIQ
CONFIG_HAVE_IDE
CONFIG_HAVE_PATA_PLATFORM
CONFIG_ISA_DMA_API
CONFIG_NEED_MACH_IO_H
CONFIG_NEED_MACH_MEMORY_H
CONFIG_NO_IOPORT
CONFIG_VIRT_TO_BUS
CONFIG_CPU_SA110
CONFIG_LEGACY_TIMER_TICK
CONFIG_NO_IOPORT_MAP
depends
or CONFIG_ARCH_MULTI_V4 || CONFIG_ATAGS or CONFIG_CPU_LITTLE_ENDIAN or CONFIG_GCC_VERSION=CONFIG_60000 or CONFIG_GCC_VERSION=CONFIG_90100 or CONFIG_MMU or NOT CONFIG_ARCH_FOOTBRIDGE or NOT CONFIG_ARCH_GEMINI or NOT CONFIG_ARCH_MOXART or NOT CONFIG_ARCH_MULTI_V4T or NOT CONFIG_ARCH_MULTI_V5 or NOT CONFIG_ARCH_SA1100 or NOT CONFIG_CC_IS_CLANG