uclibc-ng/extra/Configs/Config.in.arch

#
# For a description of the syntax of this configuration file,
# see extra/config/Kconfig-language.txt
#


#
# Binary format
#
if !ARCH_USE_MMU
choice
	prompt "Target File Format"
config UCLIBC_FORMAT_ELF
	bool "ELF"
	depends on ARCH_USE_MMU
config UCLIBC_FORMAT_FDPIC_ELF
	bool "FDPIC ELF"
	depends on !ARCH_USE_MMU && (TARGET_bfin || TARGET_frv)
	select DOPIC
config UCLIBC_FORMAT_DSBT_ELF
	bool "DBST ELF"
	depends on !ARCH_USE_MMU && TARGET_c6x
	select DOPIC
config UCLIBC_FORMAT_FLAT
	bool "STATIC FLAT"
	depends on !ARCH_USE_MMU
	select ARCH_HAS_NO_LDSO
config UCLIBC_FORMAT_FLAT_SEP_DATA
	bool "STATIC FLAT (sep-data)"
	depends on !ARCH_USE_MMU
	select ARCH_HAS_NO_LDSO
config UCLIBC_FORMAT_SHARED_FLAT
	bool "SHARED FLAT"
	depends on !ARCH_USE_MMU
	select ARCH_HAS_NO_LDSO
	help
	  Pick this one if you are using uClinux and wish to build
	  uClibc as a flat-format shared library.
endchoice
endif
if ARCH_USE_MMU
comment "Using ELF file format"
endif

config UCLIBC_SHARED_FLAT_ID
	int "Shared library ID"
	default 1
	depends on UCLIBC_FORMAT_SHARED_FLAT
	help
	  When using flat shared libraries, every library has a unique
	  system-wide identifier.  Identifier 0 is reserved for
	  executables and true shared libraries have identifiers
	  starting at 1.  The maximum shared library identifier is
	  determined by the kernel and is usually 3.  Shared library
	  N must be available on the target system as "/lib/libN.so".

	  When a shared C library is used, it usually has identifier 1,
	  but you can use this option to select a different identifier
	  if you need to.



#
# Endian Format
#
config ARCH_ANY_ENDIAN
	bool
config ARCH_BIG_ENDIAN
	bool
config ARCH_LITTLE_ENDIAN
	bool
if ARCH_ANY_ENDIAN
choice
	prompt "Target Processor Endianness"
	help
	  This is the endianness you wish to use.  Choose either Big
	  Endian, or Little Endian.
config ARCH_WANTS_BIG_ENDIAN
	bool "Big Endian"
	select ARCH_BIG_ENDIAN
config ARCH_WANTS_LITTLE_ENDIAN
	bool "Little Endian"
	select ARCH_LITTLE_ENDIAN
endchoice
endif
# if the arch only supports one endian, just display the setting
if !ARCH_ANY_ENDIAN && ARCH_LITTLE_ENDIAN
comment "Using Little Endian"
endif
if !ARCH_ANY_ENDIAN && ARCH_BIG_ENDIAN
comment "Using Big Endian"
endif

config ARCH_HAS_NO_MMU
	bool
if ARCH_HAS_NO_MMU
comment "Target CPU lacks a memory management unit (MMU)"
endif

config ARCH_HAS_MMU
	bool "Target CPU has a memory management unit (MMU)"
	depends on !ARCH_HAS_NO_MMU
	default y
	help
	  If your target CPU does not have a memory management unit (MMU), 
	  then answer N here.  Normally, Linux runs on systems with an MMU.  
	  If you are building a uClinux system, answer N.

	  Most people will answer Y.

config ARCH_USE_MMU
	bool "Do you want to utilize the MMU?"
	depends on ARCH_HAS_MMU
	default y
	help
	  If your target CPU has a MMU, and you wish to actually utilize it,
	  then answer Y here.  Normal Linux requires an MMU.

	  If you're unsure, answer Y.

config UCLIBC_HAS_FLOATS
	bool "Enable floating point number support"
	default y
	help
	  This option allows you to entirely omit all floating point number
	  support from uClibc.  This will cause floating point functions like
	  strtod() to be omitted from uClibc.  Other floating point functions, 
	  such as printf() and scanf() will still be included in the library, 
	  but will not contain support for floating point numbers.

	  Answering N to this option can reduce the size of uClibc.
	  Most people will answer Y.

config UCLIBC_HAS_FPU
	bool "Target CPU has a floating point unit (FPU)"
	default y
	help
	  If your target CPU does not have a Floating Point Unit (FPU) or a
	  kernel FPU emulator, but you still wish to support floating point
	  functions, then uClibc will need to be compiled with soft floating
	  point support (-msoft-float).  If your target CPU does not have an
	  FPU or an FPU emulator within the Linux kernel, then you should
	  answer N.

	  Most people will answer Y.

config UCLIBC_HAS_SOFT_FLOAT
	bool
	depends on UCLIBC_HAS_FLOATS && !UCLIBC_HAS_FPU
	default y

config DO_C99_MATH
	bool "Enable full C99 math library support"
	depends on UCLIBC_HAS_FLOATS
	default n
	help
	  If you want the uClibc math library to contain the full set C99
	  math library features, then answer Y.  If you leave this set to
	  N the math library will contain only the math functions that were
	  listed as part of the traditional POSIX/IEEE 1003.1b-1993 standard.
	  Leaving this option set to N will save around 35k on an x86 system.

	  If your applications require the newer C99 math library functions, 
	  then answer Y.

config DO_XSI_MATH
	bool "Enable XSI math extensions to the ISO C standard (bessel)"
	depends on UCLIBC_HAS_FLOATS
	default n
	help
	  X/Open System Interfaces extensions to ISO C math functions
	  (differential equation functions):

	  j0, j1, jn - Bessel functions of the first kind
	  y0, y1, yn - Bessel functions of the second kind

config UCLIBC_HAS_FENV
	bool "Enable C99 Floating-point environment"
	depends on UCLIBC_HAS_FLOATS
	default n
	help
	  If you want the uClibc math library to contain the C99 floating
	  point environment, rounding and exception handling functions then
	  say Y here.

	  NOTE: Supported architectures currently include:
	        i386

config UCLIBC_HAS_LONG_DOUBLE_MATH
	bool "Enable long double support"
	depends on DO_C99_MATH
	depends on TARGET_i386 || TARGET_m68k || TARGET_sparc || TARGET_x86_64 || TARGET_powerpc || TARGET_sh
	default y
	help
	  If you want the uClibc math library to contain the full set of C99
	  long double math library features, then answer Y. Don't enable it
	  for sparc w/ 32bit ABI.

config KERNEL_HEADERS
	string "Linux kernel header location"
	default "/usr/include"
	help
	  The kernel source you use to compile with should be the same
	  as the Linux kernel you run your apps on.  uClibc doesn't even
	  try to achieve binary compatibility across kernel versions.
	  So don't expect, for example, uClibc compiled with Linux kernel
	  2.0.x to implement lchown properly, since 2.0.x can't do that.
	  Similarly, if you compile uClibc vs Linux 2.4.x kernel headers,
	  but then run on Linux 2.0.x, lchown will be compiled into uClibc,
	  but won't work at all.  You have been warned.

config UCLIBC_UCLINUX_BROKEN_MUNMAP
	bool
	depends on !ARCH_USE_MMU
	default y

config HAVE_DOT_CONFIG
	bool
	default y