openwrt/toolchain/Config.in

#
config NATIVE_TOOLCHAIN
	bool
	prompt "Use host's toolchain" if DEVEL && BROKEN
	default n
	help
		If enabled, OpenWrt will compile using your existing toolchain instead of compiling one

menuconfig TOOLCHAINOPTS
	bool "Toolchain Options" if DEVEL
	depends !NATIVE_TOOLCHAIN

menuconfig EXTRA_TARGET_ARCH
	bool
	prompt "Enable an extra toolchain target architecture" if TOOLCHAINOPTS
	default y	if powerpc64
	default n
	help
	  Some builds may require a 'biarch' toolchain. This option
	  allows you to specify an additional target arch.

	  Most people will answer N here.

	config EXTRA_TARGET_ARCH_NAME
		string
		default "powerpc64"	if powerpc64
		prompt "Extra architecture name" if EXTRA_TARGET_ARCH
		help
		  Specify the cpu name (eg powerpc64 or x86_64) of the
		  additional target architecture.

	config EXTRA_TARGET_ARCH_OPTS
		string
		default "-m64"		if powerpc64
		prompt "Extra architecture compiler options" if EXTRA_TARGET_ARCH
		help
		  If you're specifying an addition target architecture,
		  you'll probably need to also provide options to make
		  the compiler use this alternate arch.

		  For example, if you're building a compiler that can build
		  both powerpc and powerpc64 binaries, you'll need to
		  specify -m64 here.

comment "Binary tools"
	depends TOOLCHAINOPTS

source "toolchain/binutils/Config.in"

comment "Compiler"
	depends TOOLCHAINOPTS

source "toolchain/gcc/Config.in"

comment "C Library"
	depends TOOLCHAINOPTS

choice
	prompt "C Library implementation" if TOOLCHAINOPTS
	default USE_UCLIBC
	help
	  Select the C library implementation.

	config USE_EGLIBC
		bool "Use eglibc"
		depends !avr32
	
	config USE_GLIBC
		bool "Use glibc"
		depends !avr32
	
	config USE_UCLIBC
		bool "Use uClibc"

endchoice

source "toolchain/eglibc/Config.in"
source "toolchain/glibc/Config.in"
source "toolchain/uClibc/Config.in"

comment "Debuggers"
	depends TOOLCHAINOPTS

config GDB
	bool
	prompt "Build gdb" if TOOLCHAINOPTS
	default n
	help
		Enable if you want to build the gdb

config INSIGHT
	bool
	prompt "Build insight-gdb" if TOOLCHAINOPTS
	select GDB
	default n
	help
		Enable if you want to build insight-gdb

config USE_UCLIBC
	bool
	default y if !TOOLCHAINOPTS

source "toolchain/gcc/Config.version"

source "toolchain/eglibc/Config.version"
source "toolchain/glibc/Config.version"
source "toolchain/uClibc/Config.version"

config LIBC
	string
	default "eglibc"  if USE_EGLIBC
	default "glibc"   if USE_GLIBC
	default "uClibc"  if USE_UCLIBC

config LIBC_VERSION
	string
	default EGLIBC_VERSION  if USE_EGLIBC
	default GLIBC_VERSION   if USE_GLIBC
	default UCLIBC_VERSION  if USE_UCLIBC

config TARGET_SUFFIX
	string
	default "gnueabi"         if (USE_EGLIBC || USE_GLIBC) && EABI_SUPPORT
	default "gnu"             if (USE_EGLIBC || USE_GLIBC) && !EABI_SUPPORT
	default "uclibcgnueabi"   if USE_UCLIBC && EABI_SUPPORT
	default "uclibc"          if USE_UCLIBC && !EABI_SUPPORT