buildroot/arch/Config.in

menu "Target options"

config BR2_ARCH_IS_64
	bool

config BR2_KERNEL_64_USERLAND_32
	bool

config BR2_SOFT_FLOAT
	bool

config BR2_ARCH_HAS_MMU_MANDATORY
	bool

config BR2_ARCH_HAS_MMU_OPTIONAL
	bool

config BR2_ARCH_HAS_FDPIC_SUPPORT
	bool

choice
	prompt "Target Architecture"
	default BR2_i386
	help
	  Select the target architecture family to build for.

config BR2_arcle
	bool "ARC (little endian)"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  Synopsys' DesignWare ARC Processor Cores are a family of 32-bit CPUs
	  that can be used from deeply embedded to high performance host
	  applications. Little endian.

config BR2_arceb
	bool "ARC (big endian)"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  Synopsys' DesignWare ARC Processor Cores are a family of 32-bit CPUs
	  that can be used from deeply embedded to high performance host
	  applications. Big endian.

config BR2_arm
	bool "ARM (little endian)"
	# MMU support is set by the subarchitecture file, arch/Config.in.arm
	help
	  ARM is a 32-bit reduced instruction set computer (RISC) instruction
	  set architecture (ISA) developed by ARM Holdings. Little endian.
	  http://www.arm.com/
	  http://en.wikipedia.org/wiki/ARM

config BR2_armeb
	bool "ARM (big endian)"
	# MMU support is set by the subarchitecture file, arch/Config.in.arm
	help
	  ARM is a 32-bit reduced instruction set computer (RISC) instruction
	  set architecture (ISA) developed by ARM Holdings. Big endian.
	  http://www.arm.com/
	  http://en.wikipedia.org/wiki/ARM

config BR2_aarch64
	bool "AArch64 (little endian)"
	select BR2_ARCH_IS_64
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  Aarch64 is a 64-bit architecture developed by ARM Holdings.
	  http://www.arm.com/products/processors/instruction-set-architectures/armv8-architecture.php
	  http://en.wikipedia.org/wiki/ARM

config BR2_aarch64_be
	bool "AArch64 (big endian)"
	select BR2_ARCH_IS_64
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  Aarch64 is a 64-bit architecture developed by ARM Holdings.
	  http://www.arm.com/products/processors/instruction-set-architectures/armv8-architecture.php
	  http://en.wikipedia.org/wiki/ARM

config BR2_bfin
	bool "Blackfin"
	select BR2_ARCH_HAS_FDPIC_SUPPORT
	help
	  The Blackfin is a family of 16 or 32-bit microprocessors developed,
	  manufactured and marketed by Analog Devices.
	  http://www.analog.com/
	  http://en.wikipedia.org/wiki/Blackfin

config BR2_i386
	bool "i386"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  Intel i386 architecture compatible microprocessor
	  http://en.wikipedia.org/wiki/I386

config BR2_m68k
	bool "m68k"
	# MMU support is set by the subarchitecture file, arch/Config.in.m68k
	help
	  Motorola 68000 family microprocessor
	  http://en.wikipedia.org/wiki/M68k

config BR2_microblazeel
	bool "Microblaze AXI (little endian)"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  Soft processor core designed for Xilinx FPGAs from Xilinx. AXI bus
	  based architecture (little endian)
	  http://www.xilinx.com
	  http://en.wikipedia.org/wiki/Microblaze

config BR2_microblazebe
	bool "Microblaze non-AXI (big endian)"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  Soft processor core designed for Xilinx FPGAs from Xilinx. PLB bus
	  based architecture (non-AXI, big endian)
	  http://www.xilinx.com
	  http://en.wikipedia.org/wiki/Microblaze

config BR2_mips
	bool "MIPS (big endian)"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  MIPS is a RISC microprocessor from MIPS Technologies. Big endian.
	  http://www.mips.com/
	  http://en.wikipedia.org/wiki/MIPS_Technologies

config BR2_mipsel
	bool "MIPS (little endian)"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  MIPS is a RISC microprocessor from MIPS Technologies. Little endian.
	  http://www.mips.com/
	  http://en.wikipedia.org/wiki/MIPS_Technologies

config BR2_mips64
	bool "MIPS64 (big endian)"
	select BR2_ARCH_IS_64
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  MIPS is a RISC microprocessor from MIPS Technologies. Big endian.
	  http://www.mips.com/
	  http://en.wikipedia.org/wiki/MIPS_Technologies

config BR2_mips64el
	bool "MIPS64 (little endian)"
	select BR2_ARCH_IS_64
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  MIPS is a RISC microprocessor from MIPS Technologies. Little endian.
	  http://www.mips.com/
	  http://en.wikipedia.org/wiki/MIPS_Technologies

config BR2_nios2
	bool "Nios II"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  Nios II is a soft core processor from Altera Corporation.
	  http://www.altera.com/
	  http://en.wikipedia.org/wiki/Nios_II

config BR2_or1k
	bool "OpenRISC"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  OpenRISC is a free and open processor for embedded system.
	  http://openrisc.io

config BR2_powerpc
	bool "PowerPC"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  PowerPC is a RISC architecture created by Apple-IBM-Motorola alliance.
	  Big endian.
	  http://www.power.org/
	  http://en.wikipedia.org/wiki/Powerpc

config BR2_powerpc64
	bool "PowerPC64 (big endian)"
	select BR2_ARCH_IS_64
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  PowerPC is a RISC architecture created by Apple-IBM-Motorola alliance.
	  Big endian.
	  http://www.power.org/
	  http://en.wikipedia.org/wiki/Powerpc

config BR2_powerpc64le
	bool "PowerPC64 (little endian)"
	select BR2_ARCH_IS_64
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  PowerPC is a RISC architecture created by Apple-IBM-Motorola alliance.
	  Little endian.
	  http://www.power.org/
	  http://en.wikipedia.org/wiki/Powerpc

config BR2_sh
	bool "SuperH"
	select BR2_ARCH_HAS_MMU_OPTIONAL
	help
	  SuperH (or SH) is a 32-bit reduced instruction set computer (RISC)
	  instruction set architecture (ISA) developed by Hitachi.
	  http://www.hitachi.com/
	  http://en.wikipedia.org/wiki/SuperH

config BR2_sparc
	bool "SPARC"
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  SPARC (from Scalable Processor Architecture) is a RISC instruction
	  set architecture (ISA) developed by Sun Microsystems.
	  http://www.oracle.com/sun
	  http://en.wikipedia.org/wiki/Sparc

config BR2_sparc64
	bool "SPARC64"
	select BR2_ARCH_IS_64
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  SPARC (from Scalable Processor Architecture) is a RISC instruction
	  set architecture (ISA) developed by Sun Microsystems.
	  http://www.oracle.com/sun
	  http://en.wikipedia.org/wiki/Sparc

config BR2_x86_64
	bool "x86_64"
	select BR2_ARCH_IS_64
	select BR2_ARCH_HAS_MMU_MANDATORY
	help
	  x86-64 is an extension of the x86 instruction set (Intel i386
	  architecture compatible microprocessor).
	  http://en.wikipedia.org/wiki/X86_64

config BR2_xtensa
	bool "Xtensa"
	# MMU support is set by the subarchitecture file, arch/Config.in.xtensa
	help
	  Xtensa is a Tensilica processor IP architecture.
	  http://en.wikipedia.org/wiki/Xtensa
	  http://www.tensilica.com/

endchoice

# The following string values are defined by the individual
# Config.in.$ARCH files
config BR2_ARCH
	string

config BR2_ENDIAN
	string

config BR2_GCC_TARGET_ARCH
	string

config BR2_GCC_TARGET_ABI
	string

config BR2_GCC_TARGET_CPU
	string

config BR2_GCC_TARGET_CPU_REVISION
	string

# The value of this option will be passed as --with-fpu=<value> when
# building gcc (internal backend) or -mfpu=<value> in the toolchain
# wrapper (external toolchain)
config BR2_GCC_TARGET_FPU
	string

# The value of this option will be passed as --with-float=<value> when
# building gcc (internal backend) or -mfloat-abi=<value> in the toolchain
# wrapper (external toolchain)
config BR2_GCC_TARGET_FLOAT_ABI
	string

# The value of this option will be passed as --with-mode=<value> when
# building gcc (internal backend) or -m<value> in the toolchain
# wrapper (external toolchain)
config BR2_GCC_TARGET_MODE
	string

# Must be selected by binary formats that support shared libraries.
config BR2_BINFMT_SUPPORTS_SHARED
	bool

# Set up target binary format
choice
	prompt "Target Binary Format"
	default BR2_BINFMT_ELF if BR2_USE_MMU
	default BR2_BINFMT_FDPIC if BR2_ARCH_HAS_FDPIC_SUPPORT
	default BR2_BINFMT_FLAT

config BR2_BINFMT_ELF
	bool "ELF"
	depends on BR2_USE_MMU
	select BR2_BINFMT_SUPPORTS_SHARED
	help
	  ELF (Executable and Linkable Format) is a format for libraries and
	  executables used across different architectures and operating
	  systems.

config BR2_BINFMT_FDPIC
	bool "FDPIC"
	depends on BR2_ARCH_HAS_FDPIC_SUPPORT
	select BR2_BINFMT_SUPPORTS_SHARED
	help
	  ELF FDPIC binaries are based on ELF, but allow the individual load
	  segments of a binary to be located in memory independently of each
	  other. This makes this format ideal for use in environments where no
	  MMU is available.

config BR2_BINFMT_FLAT
	bool "FLAT"
	depends on !BR2_USE_MMU
	help
	  FLAT binary is a relatively simple and lightweight executable format
	  based on the original a.out format. It is widely used in environment
	  where no MMU is available.

endchoice

# Set up flat binary type
choice
	prompt "FLAT Binary type"
	depends on BR2_BINFMT_FLAT
	default BR2_BINFMT_FLAT_ONE

config BR2_BINFMT_FLAT_ONE
	bool "One memory region"
	help
	  All segments are linked into one memory region.

config BR2_BINFMT_FLAT_SEP_DATA
	bool "Separate data and code region"
	# this FLAT binary type technically exists on m68k, but fails
	# to build numerous packages: due to architecture limitation,
	# big functions cannot be built in this mode. They cause build
	# failures such as "Tried to convert PC relative branch to
	# absolute jump" or "error: value -yyyyy out of range".
	depends on BR2_bfin
	help
	  Allow for the data and text segments to be separated and placed in
	  different regions of memory.

config BR2_BINFMT_FLAT_SHARED
	bool "Shared binary"
	depends on BR2_m68k || BR2_bfin
	# Even though this really generates shared binaries, there is no libdl
	# and dlopen() cannot be used. So packages that require shared
	# libraries cannot be built. Therefore, we don't select
	# BR2_BINFMT_SUPPORTS_SHARED and therefore force BR2_STATIC_LIBS.
	# Although this adds -static to the compilation, that's not a problem
	# because the -mid-shared-library option overrides it.
	help
	  Allow to load and link indiviual FLAT binaries at run time.

endchoice

if BR2_arcle || BR2_arceb
source "arch/Config.in.arc"
endif

if BR2_arm || BR2_armeb || BR2_aarch64 || BR2_aarch64_be
source "arch/Config.in.arm"
endif

if BR2_bfin
source "arch/Config.in.bfin"
endif

if BR2_m68k
source "arch/Config.in.m68k"
endif

if BR2_microblazeel || BR2_microblazebe
source "arch/Config.in.microblaze"
endif

if BR2_mips || BR2_mips64 || BR2_mipsel || BR2_mips64el
source "arch/Config.in.mips"
endif

if BR2_nios2
source "arch/Config.in.nios2"
endif

if BR2_or1k
source "arch/Config.in.or1k"
endif

if BR2_powerpc || BR2_powerpc64 || BR2_powerpc64le
source "arch/Config.in.powerpc"
endif

if BR2_sh
source "arch/Config.in.sh"
endif

if BR2_sparc || BR2_sparc64
source "arch/Config.in.sparc"
endif

if BR2_i386 || BR2_x86_64
source "arch/Config.in.x86"
endif

if BR2_xtensa
source "arch/Config.in.xtensa"
endif

endmenu # Target options