tmp

[uclibc-ng.git] / extra / Configs / Config.in

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

mainmenu "uClibc-ng $VERSION C Library Configuration"

config DESIRED_TARGET_ARCH
	string
	option env="ARCH"

config VERSION
	string
	option env="VERSION"

choice
	prompt "Target Architecture"
	default TARGET_aarch64 if DESIRED_TARGET_ARCH = "aarch64"
	default TARGET_alpha if DESIRED_TARGET_ARCH = "alpha"
	default TARGET_arc if DESIRED_TARGET_ARCH = "arc"
	default TARGET_arm if DESIRED_TARGET_ARCH = "arm"
	default TARGET_avr32 if DESIRED_TARGET_ARCH = "avr32"
	default TARGET_bfin if DESIRED_TARGET_ARCH = "bfin"
	default TARGET_cris if DESIRED_TARGET_ARCH = "cris"
	default TARGET_csky if DESIRED_TARGET_ARCH = "csky"
	default TARGET_frv if DESIRED_TARGET_ARCH = "frv"
	default TARGET_h8300 if DESIRED_TARGET_ARCH = "h8300"
	default TARGET_hppa if DESIRED_TARGET_ARCH = "hppa"
	default TARGET_i386 if DESIRED_TARGET_ARCH = "i386"
	default TARGET_ia64 if DESIRED_TARGET_ARCH = "ia64"
	default TARGET_kvx if DESIRED_TARGET_ARCH = "kvx"
	default TARGET_lm32 if DESIRED_TARGET_ARCH = "lm32"
	default TARGET_m68k if DESIRED_TARGET_ARCH = "m68k"
	default TARGET_metag if DESIRED_TARGET_ARCH = "metag"
	default TARGET_microblaze if DESIRED_TARGET_ARCH = "microblaze"
	default TARGET_mips if DESIRED_TARGET_ARCH = "mips"
	default TARGET_nds32 if DESIRED_TARGET_ARCH = "nds32"
	default TARGET_nios2 if DESIRED_TARGET_ARCH = "nios2"
	default TARGET_or1k if DESIRED_TARGET_ARCH = "or1k"
	default TARGET_powerpc if DESIRED_TARGET_ARCH = "powerpc"
	default TARGET_riscv64 if DESIRED_TARGET_ARCH = "riscv64"
	default TARGET_riscv32 if DESIRED_TARGET_ARCH = "riscv32"
	default TARGET_sh if DESIRED_TARGET_ARCH = "sh"
	default TARGET_sparc if DESIRED_TARGET_ARCH = "sparc"
	default TARGET_sparc64 if DESIRED_TARGET_ARCH = "sparc64"
	default TARGET_tile if DESIRED_TARGET_ARCH = "tile"
	default TARGET_x86_64 if DESIRED_TARGET_ARCH = "x86_64"
	default TARGET_xtensa if DESIRED_TARGET_ARCH = "xtensa"
	help
	  The architecture of your target.

config TARGET_aarch64
	bool "aarch64"

config TARGET_alpha
	bool "alpha"

config TARGET_arc
	bool "arc"

config TARGET_arm
	bool "arm"

config TARGET_avr32
	bool "avr32"

config TARGET_bfin
	bool "bfin"

# someone could sync this tree:
# http://linux-c6x.org/git/?p=uClibc.git;a=summary
config TARGET_c6x
	bool "c6x"

config TARGET_cris
	bool "cris"

config TARGET_csky
	bool "csky"

config TARGET_frv
	bool "frv"

config TARGET_h8300
	bool "h8300"

config TARGET_hppa
	bool "hppa"

config TARGET_i386
	bool "i386"

config TARGET_ia64
	bool "ia64"

config TARGET_kvx
	bool "kvx"

config TARGET_lm32
	bool "lm32"

config TARGET_m68k
	bool "m68k"

config TARGET_metag
	bool "metag"

config TARGET_microblaze
	bool "microblaze"

config TARGET_mips
	bool "mips"

config TARGET_nds32
	bool "nds32"

config TARGET_nios2
	bool "nios2"

config TARGET_or1k
	bool "or1k"

config TARGET_powerpc
	bool "powerpc"

config TARGET_riscv64
	bool "riscv64"

config TARGET_riscv32
	bool "riscv32"

config TARGET_sh
	bool "superh"

config TARGET_sparc
	bool "sparc"

config TARGET_sparc64
	bool "sparc64"

config TARGET_tile
	bool "tile"

config TARGET_x86_64
	bool "x86_64"

config TARGET_xtensa
	bool "xtensa"

endchoice

config TARGET_LDSO_NAME
	string
	default "ld64-uClibc" if TARGET_ia64
	default "ld64-uClibc" if TARGET_powerpc64
	default "ld64-uClibc" if TARGET_sparc64
	default "ld64-uClibc" if TARGET_x86_64
	default "ld64-uClibc" if TARGET_kvx
	default "ld64-uClibc" if CONFIG_MIPS_N64_ABI
	default "ld-uClibc"

config TARGET_ARCH_BITS
	int
	default 64 if TARGET_aarch64
	default 64 if TARGET_ia64
	default 64 if TARGET_powerpc64
	default 64 if TARGET_sparc64
	default 64 if TARGET_x86_64
	default 64 if TARGET_kvx
	default 64 if CONFIG_MIPS_N64_ABI
	default 32

menu "Target Architecture Features and Options"

if TARGET_aarch64
source "extra/Configs/Config.aarch64"
endif

if TARGET_alpha
source "extra/Configs/Config.alpha"
endif

if TARGET_arm
source "extra/Configs/Config.arm"
endif

if TARGET_avr32
source "extra/Configs/Config.avr32"
endif

if TARGET_bfin
source "extra/Configs/Config.bfin"
endif

if TARGET_cris
source "extra/Configs/Config.cris"
endif

if TARGET_csky
source "extra/Configs/Config.csky"
endif

if TARGET_frv
source "extra/Configs/Config.frv"
endif

if TARGET_h8300
source "extra/Configs/Config.h8300"
endif

if TARGET_hppa
source "extra/Configs/Config.hppa"
endif

if TARGET_i386
source "extra/Configs/Config.i386"
endif

if TARGET_ia64
source "extra/Configs/Config.ia64"
endif

if TARGET_kvx
source "extra/Configs/Config.kvx"
endif

if TARGET_lm32
source "extra/Configs/Config.lm32"
endif

if TARGET_m68k
source "extra/Configs/Config.m68k"
endif

if TARGET_metag
source "extra/Configs/Config.metag"
endif

if TARGET_nds32
source "extra/Configs/Config.nds32"
endif

if TARGET_nios2
source "extra/Configs/Config.nios2"
endif

if TARGET_microblaze
source "extra/Configs/Config.microblaze"
endif

if TARGET_mips
source "extra/Configs/Config.mips"
endif

if TARGET_or1k
source "extra/Configs/Config.or1k"
endif

if TARGET_powerpc
source "extra/Configs/Config.powerpc"
endif

if TARGET_riscv64
source "extra/Configs/Config.riscv64"
endif

if TARGET_riscv32
source "extra/Configs/Config.riscv32"
endif

if TARGET_sh
source "extra/Configs/Config.sh"
endif

if TARGET_sparc
source "extra/Configs/Config.sparc"
endif

if TARGET_sparc64
source "extra/Configs/Config.sparc64"
endif

if TARGET_tile
source "extra/Configs/Config.tile"
endif

if TARGET_x86_64
source "extra/Configs/Config.x86_64"
endif

if TARGET_xtensa
source "extra/Configs/Config.xtensa"
endif

if TARGET_c6x
source "extra/Configs/Config.c6x"
endif

if TARGET_arc
source "extra/Configs/Config.arc"
endif

config TARGET_SUBARCH
	string
	default "e500" if CONFIG_E500
	default "classic" if CONFIG_CLASSIC
	default "sh4" if CONFIG_SH4
	default "sh4" if CONFIG_SH4A
	default "" if CONFIG_386
	default "i486" if CONFIG_486
	default "i586" if CONFIG_586
	default "i686" if CONFIG_686
	default ""

source "extra/Configs/Config.in.arch"

endmenu

menu "General Library Settings"

config HAVE_NO_PIC
	bool

config DOPIC
	bool "Generate only Position Independent Code (PIC)"
	default y
	depends on !HAVE_NO_PIC
	help
	  If you wish to build all of uClibc as PIC objects, then answer Y here.
	  If you are unsure, then you should answer N.

config STATIC_PIE
	bool "Add support for Static Position Independent Executables (PIE)"
	default n
	depends on DOPIC && !UCLIBC_FORMAT_FDPIC_ELF && \
		(TARGET_arm || TARGET_i386 || TARGET_x86_64 || TARGET_aarch64 || \
		 TARGET_mips || TARGET_xtensa || TARGET_powerpc)

config ARCH_HAS_NO_SHARED
	bool

config ARCH_HAS_NO_LDSO
	bool
	select ARCH_HAS_NO_SHARED

config ARCH_HAS_UCONTEXT
	bool

config HAVE_SHARED
	bool "Enable shared libraries"
	depends on !ARCH_HAS_NO_SHARED
	default y
	help
	  If you wish to build uClibc with support for shared libraries then
	  answer Y here.  If you only want to build uClibc as a static library,
	  then answer N.

config FORCE_SHAREABLE_TEXT_SEGMENTS
	bool "Only load shared libraries which can share their text segment"
	depends on HAVE_SHARED
	select DOPIC
	help
	  If you answer Y here, the uClibc native shared library loader will
	  only load shared libraries, which do not need to modify any
	  non-writable segments. These libraries haven't set the DT_TEXTREL
	  tag in the dynamic section (==> objdump).
	  All your libraries must be compiled with -fPIC or -fpic, and all
	  assembler function must be written as position independent code (PIC).
	  Enabling this option will make uClibc's shared library loader a
	  little bit smaller and guarantee that no memory will be wasted by
	  badly coded shared libraries.

config LDSO_LDD_SUPPORT
	bool "Native 'ldd' support"
	depends on HAVE_SHARED
	default y
	help
	  Enable all the code needed to support traditional ldd,
	  which executes the shared library loader to resolve all dependencies
	  and then provide a list of shared libraries that are required for an
	  application to function.  Disabling this option will make uClibc's
	  shared library loader a little bit smaller.
	  Most people will answer Y.

config LDSO_CACHE_SUPPORT
	bool "Enable library loader cache (ld.so.conf)"
	depends on HAVE_SHARED
	default y
	help
	  Enable this to make use of /etc/ld.so.conf, the shared library loader
	  cache configuration file to support for non-standard library paths.
	  After updating this file, it is necessary to run 'ldconfig' to update
	  the /etc/ld.so.cache shared library loader cache file.

config LDSO_PRELOAD_ENV_SUPPORT
	bool "Enable library loader LD_PRELOAD environment"
	depends on HAVE_SHARED
	default y
	help
	  Enable this to make use of LD_PRELOAD environment variable.
	  A whitespace-separated list of additional, user-specified, ELF shared
	  libraries to be loaded before all others. This can be used to
	  selectively override functions in other shared libraries. For
	  set-user-ID/set-group-ID ELF binaries, only libraries in the standard
	  search directories that are also set-user-ID will be loaded.

config LDSO_PRELOAD_FILE_SUPPORT
	bool "Enable library loader preload file (ld.so.preload)"
	depends on HAVE_SHARED
	help
	  Enable this to make use of /etc/ld.so.preload. This file contains a
	  whitespace separated list of shared libraries to be loaded before
	  the program.

config LDSO_BASE_FILENAME
	string "Shared library loader naming prefix"
	depends on HAVE_SHARED && (LDSO_CACHE_SUPPORT || LDSO_PRELOAD_FILE_SUPPORT)
	default "ld.so"
	help
	  If you wish to support both uClibc and glibc on the same system, it
	  is necessary to set this to something other than "ld.so" to avoid
	  conflicts with glibc, which also uses "ld.so".  This prevents both
	  libraries from using the same /etc/ld.so.* files.  If you wish to
	  support both uClibc and glibc on the same system then you should set
	  this to "ld-uClibc.so".

	  Most people will leave this set to the default of "ld.so".

	  WARNING: Changing the default prefix could cause problems with
	           binutils' ld !

config LDSO_STANDALONE_SUPPORT
	bool "Dynamic linker stand-alone mode support"
	depends on HAVE_SHARED
	help
	  The dynamic linker can be run either indirectly through running some
	  dynamically linked program or library (in which case no command line
	  options to the dynamic linker can be passed and, in the ELF case, the
	  dynamic linker which is stored in the .interp section of the program
	  is executed) or directly by running:

	  /lib/ld-uClibc.so.*  [OPTIONS] [PROGRAM [ARGUMENTS]]

	  Stand-alone execution is a prerequisite for adding prelink
	  capabilities to uClibc dynamic linker, as well useful for testing an
	  updated version of the dynamic linker without breaking the system.

config LDSO_PRELINK_SUPPORT
	bool "Dynamic linker prelink support"
	depends on HAVE_SHARED
	select LDSO_STANDALONE_SUPPORT
	help
	  The dynamic linker can be used in stand-alone mode by the prelink tool
	  for prelinking ELF shared libraries and binaries to speed up startup
	  time. It also is able to load and handle prelinked libraries and
	  binaries at runtime.

config UCLIBC_STATIC_LDCONFIG
	bool "Link ldconfig statically"
	depends on HAVE_SHARED
	default y
	help
	  Enable this option to statically link the ldconfig binary.

	  Making ldconfig static can be beneficial if you have a library
	  problem and need to use ldconfig to recover.  Sometimes it is
	  preferable to instead keep the size of the system down, in which
	  case you should disable this option.

config LDSO_RUNPATH
	bool "Enable ELF RUNPATH tag support"
	depends on HAVE_SHARED
	default y if LDSO_CACHE_SUPPORT
	help
	  ELF's may have dynamic RPATH/RUNPATH tags.  These tags list paths
	  which extend the library search paths.  They are really only useful
	  if a package installs libraries in non standard locations and
	  ld.so.conf support is disabled.

	  Usage of RUNPATH tags is not too common, so disabling this feature
	  should be safe for most people.

config LDSO_RUNPATH_OF_EXECUTABLE
	bool "Use executables RUNPATH/RPATH when searching for libraries."
	depends on LDSO_RUNPATH
	default n
	help
	  Use the executables RUNPATH/RPATH to find to find libraries even
	  though this behavour is not standard.  Setting this option causes
	  the uclibc dynamic linker behavour to match the glibc dynamic linker.

config LDSO_SAFE_RUNPATH
	bool "Allow only RUNPATH beginning with /"
	depends on LDSO_RUNPATH
	default y
	help
	  Allow only absolute path in RPATH/RUNPATH.

config LDSO_SEARCH_INTERP_PATH
	bool "Add ldso path to lib search path"
	depends on HAVE_SHARED
	default y
	help
	  The ldso is told where it is being executed from and can use that
	  path to find related core libraries.  This is useful by default,
	  but can be annoying in a mixed development environment.

	  i.e. if the ldso is run from /foo/boo/ldso.so, it will start its
	  library search with /foo/boo/

	  If unsure, simply say Y here.

config LDSO_LD_LIBRARY_PATH
	bool "Add LD_LIBRARY_PATH to lib search path"
	depends on HAVE_SHARED
	default y
	help
	  On hardened system it could be useful to disable the use of
	  LD_LIBRARY_PATH environment variable (a colon-separated list of
	  directories in which to search for ELF libraries at execution-time).

	  If unsure, simply say Y here.

config UCLIBC_CTOR_DTOR
	bool
	default y if !TARGET_riscv64
	help
	  If you wish to build uClibc with support for global constructor
	  (ctor) and global destructor (dtor) support, then answer Y here.
	  When ctor/dtor support is enabled, binaries linked with uClibc must
	  also be linked with crtbegin.o and crtend.o which are provided by gcc
	  (the "*startfile:" and "*endfile:" settings in your gcc specs file
	  may need to be adjusted to include these files).  This support will
	  also add a small amount of additional size to each binary compiled vs
	  uClibc.  If you will be using uClibc with C++, or if you need the gcc
	  __attribute__((constructor)) and __attribute__((destructor)) to work,
	  then you definitely want to answer Y here.  If you don't need ctors
	  or dtors and want your binaries to be as small as possible, then
	  answer N.

config LDSO_GNU_HASH_SUPPORT
	bool "Enable GNU hash style support"
	depends on HAVE_SHARED && !TARGET_mips
	help
	  Newest binutils support a new hash style named GNU-hash. The dynamic
	  linker will use the new GNU-hash section (.gnu.hash) for symbol lookup
	  if present into the ELF binaries, otherwise it will use the old SysV
	  hash style (.hash). This ensures that it is completely backward
	  compatible.
	  Further, being the hash table implementation self-contained into each
	  executable and shared libraries, objects with mixed hash style can
	  peacefully coexist in the same process.

	  If you want to use this new feature, answer Y

choice
	prompt "Thread support"
	default HAS_NO_THREADS
	help
	  If you want to compile uClibc with pthread support, then answer Y.
	  This will increase the size of uClibc by adding a bunch of locking
	  to critical data structures, and adding extra code to ensure that
	  functions are properly reentrant.

config HAS_NO_THREADS
	bool "none"
	help
	  Disable thread support.

config UCLIBC_HAS_LINUXTHREADS
	bool "Linuxthreads"
	# linuxthreads need nanosleep()
	select UCLIBC_HAS_REALTIME
	depends on !TARGET_aarch64 && \
		   !TARGET_riscv64 && \
		   !TARGET_riscv32 && \
		   !TARGET_metag
	help
	  If you want to compile uClibc with Linuxthreads support, then answer Y.

config UCLIBC_HAS_THREADS_NATIVE
	bool "Native POSIX Threading (NPTL)"
	select UCLIBC_HAS_TLS
	select UCLIBC_HAS_STDIO_FUTEXES
	select UCLIBC_HAS_REALTIME
	# i386 has no lowlevellock support (yet) as opposed to i486 onward
	depends on !CONFIG_386 && \
		   !TARGET_alpha && \
		   !TARGET_avr32 && \
		   !TARGET_bfin && \
		   !TARGET_c6x && \
		   !TARGET_cris && \
		   !TARGET_frv && \
		   !TARGET_h8300 && \
		   !TARGET_hppa && \
		   !TARGET_ia64 && \
		   (ARCH_USE_MMU || TARGET_arm)
	help
	  If you want to compile uClibc with NPTL support, then answer Y.

endchoice

config UCLIBC_HAS_THREADS
	def_bool y if !HAS_NO_THREADS

config UCLIBC_HAS_TLS
	bool "Thread-Local Storage"
	depends on UCLIBC_HAS_THREADS_NATIVE
	help
	  If you want to enable TLS support then answer Y.
	  This is fast an efficient way to store per-thread local data
	  which is not on stack. It needs __thread support enabled in
	  gcc.

config PTHREADS_DEBUG_SUPPORT
	bool "Build pthreads debugging support"
	depends on UCLIBC_HAS_THREADS
	help
	  Say Y here if you wish to be able to debug applications that use
	  uClibc's pthreads library.  By enabling this option, a library
	  named libthread_db will be built.  This library will be dlopen()'d
	  by gdb and will allow gdb to debug the threads in your application.

	  IMPORTANT NOTE!  Because gdb must dlopen() the libthread_db library,
	  you must compile gdb with uClibc in order for pthread debugging to
	  work properly.

	  If you are doing development and want to debug applications using
	  uClibc's pthread library, answer Y.  Otherwise, answer N.


config UCLIBC_HAS_SYSLOG
	bool "Syslog support"
	default y
	depends on UCLIBC_HAS_NETWORK_SUPPORT
	select UCLIBC_HAS_SOCKET
	help
	  Support sending messages to the system logger.
	  This requires socket-support.

config UCLIBC_HAS_LFS
	def_bool y
	help
	  Large file support (always enabled; config symbol retained for
	  feature test to be compatible with uClibc).
choice
	prompt "Malloc Implementation"
	default MALLOC if ! ARCH_USE_MMU
	default MALLOC_STANDARD if ARCH_USE_MMU

config MALLOC
	bool "malloc"
	help
	  "malloc" use mmap for all allocations and so works very well on
	  MMU-less systems that do not support the brk() system call.   It is
	  pretty smart about reusing already allocated memory, and minimizing
	  memory wastage.
	  This is the default for uClinux MMU-less systems.

config MALLOC_SIMPLE
	bool "malloc-simple"
	help
	  "malloc-simple" is trivially simple and slow as molasses.  It
	  was written from scratch for uClibc, and is the simplest possible
	  (and therefore smallest) malloc implementation.

	  This uses only the mmap() system call to allocate and free memory,
	  and does not use the brk() system call at all, making it a fine
	  choice for MMU-less systems with very limited memory.  It's 100%
	  standards compliant, thread safe, very small, and releases freed
	  memory back to the OS immediately rather than keeping it in the
	  process's heap for reallocation.  It is also VERY SLOW.

config MALLOC_STANDARD
	bool "malloc-standard"
	depends on ARCH_USE_MMU
	help
	  "malloc-standard" is derived from the public domain dlmalloc
	  implementation by Doug Lea.  It is quite fast, and is pretty smart
	  about reusing already allocated memory, and minimizing memory
	  wastage.  This uses brk() for small allocations, while using mmap()
	  for larger allocations.  This is the default malloc implementation
	  for uClibc.

	  If unsure, answer "malloc-standard".

endchoice

config UCLIBC_DYNAMIC_ATEXIT
	bool "Dynamic atexit() Support"
	default y
	help
	  When this option is enabled, uClibc will support an infinite number,
	  of atexit() and on_exit() functions, limited only by your available
	  memory.  This can be important when uClibc is used with C++, since
	  global destructors are implemented via atexit(), and it is quite
	  possible to exceed the default number when this option is disabled.
	  Enabling this option adds a few bytes, and more significantly makes
	  atexit and on_exit depend on malloc, which can be bad when compiling
	  static executables.

	  Unless you use uClibc with C++, you should probably answer N.

config UCLIBC_HAS_UTMPX
	bool "utmpx based support for tracking login/logouts to/from the system"
	help
	  Answer y to enable support for accessing user accounting database.
	  It can be used to track all login/logout to the system.

config UCLIBC_HAS_UTMP
	bool "utmp support (XPG2 compat, SVr4 compat)"
	depends on UCLIBC_HAS_UTMPX
	help
	  Answer y to enable legacy SVID support for accessing
	  user accounting database:
		   getutent(), getutid(), getutline(), pututline(),
		   setutent(), endutent(), utmpname() in utmp.h
	  It can be used to track all login/logout to the system.

	  If unsure, answer N and use corresponding POSIX functions
	  from utmpx.h

config UCLIBC_SUSV2_LEGACY
	bool "Enable SuSv2 LEGACY functions"
	help
	  Enable this option if you want to have SuSv2 LEGACY functions
	  Currently applies to:

	  valloc

	  WARNING! ABI incompatibility.

config UCLIBC_SUSV3_LEGACY
	bool "Enable SuSv3 LEGACY functions"
	#vfork,
	# h_errno
	# gethostbyaddr
	# gethostbyname
	help
	  Enable this option if you want to have SuSv3 LEGACY functions
	  in the library, else they are replaced by SuSv3 proposed macros.
	  Currently applies to:

	  bcmp, bcopy, bzero, index, rindex, ftime,
	  bsd_signal, (ecvt), (fcvt), gcvt, (getcontext),
	  (getwd), (makecontext),
	  mktemp, (pthread_attr_getstackaddr), (pthread_attr_setstackaddr),
	  scalb, (setcontext), (swapcontext), ualarm, usleep,
	  wcswcs.

	  WARNING! ABI incompatibility.

config UCLIBC_HAS_CONTEXT_FUNCS
	bool "Use obsolescent context control functions"
	depends on UCLIBC_SUSV3_LEGACY && ARCH_HAS_UCONTEXT
	help
	  Add into library the SuSv3 obsolescent functions used for context
	  control. The setcontext family allows the implementation in C of
	  advanced control flow patterns such as iterators, fibers, and
	  coroutines. They may be viewed as an advanced version of
	  setjmp/longjmp; whereas the latter allows only a single non-local jump
	  up the stack, setcontext allows the creation of multiple cooperative
	  threads of control, each with its own stack.
	  These functions are: setcontext, getcontext, makecontext, swapcontext.

config UCLIBC_SUSV3_LEGACY_MACROS
	bool "Enable SuSv3 LEGACY macros"
	help
	  Enable this option if you want to have SuSv3 LEGACY macros.
	  Currently applies to bcopy/bzero/bcmp/index/rindex et al.
	  WARNING! ABI incompatibility.

config UCLIBC_SUSV4_LEGACY
	bool "Enable SuSv4 LEGACY or obsolescent functions"
	help
	  Enable this option if you want to have SuSv4 LEGACY functions
	  and macros in the library.
	  Currently applies to:

	  - XSI functions:
	    _longjmp, _setjmp, _tolower, _toupper, ftw, getitimer,
	    gettimeofday, isascii, pthread_getconcurrency,
	    pthread_setconcurrency, setitimer, setpgrp, sighold,
	    sigignore, sigpause, sigrelse, sigset, siginterrupt,
	    tempnam, toascii, ulimit.

	  - Base functions:
	    asctime, asctime_r, ctime, ctime_r, gets, rand_r,
	    tmpnam, utime.

	  WARNING! ABI incompatibility.

config UCLIBC_STRICT_HEADERS
	bool "Hide structures and constants for unsupported features"
	help
	  Hide structures and constants in headers that should not be used,
	  because the respective feature is disabled.

	  WARNING! enabling this option requires to patch many faulty apps,
	  since they make (wrongly) use of these structures/constants,
	  although the feature was disabled.

config UCLIBC_HAS_STUBS
	bool "Provide stubs for unavailable functionality"
	help
	  With this option uClibc provides non-functional stubs for
	  functions which are impossible to implement on the target
	  architecture. Otherwise, such functions are simply omitted.

config UCLIBC_HAS_SHADOW
	bool "Shadow Password Support"
	default y
	help
	  Answer N if you do not need shadow password support.
	  Most people will answer Y.

config UCLIBC_HAS_PROGRAM_INVOCATION_NAME
	bool "Support for program_invocation_name"
	help
	  Support for the GNU-specific program_invocation_name and
	  program_invocation_short_name strings.  Some GNU packages
	  (like tar and coreutils) utilize these for extra useful
	  output, but in general are not required.

	  At startup, these external strings are automatically set
	  up based on the value of ARGV[0].

	  If unsure, just answer N.

config UCLIBC_HAS___PROGNAME
	bool "Support for __progname"
	default y
	help
	  Some packages (like openssh) like to peek into internal libc
	  symbols to make their output a bit more user friendly.

	  At startup, __progname is automatically set up based on the
	  value of ARGV[0].

	  If unsure, just answer N.

config UCLIBC_HAS_PTY
	bool "Support for pseudo-terminals"
	default y
	help
	  This enables support for pseudo-terminals (see man 4 pts
	  and man 7 pty).

	  If unsure, just answer Y.

config ASSUME_DEVPTS
	bool "Assume that /dev/pts is a devpts or devfs file system"
	default y
	depends on UCLIBC_HAS_PTY
	help
	  Enable this if /dev/pts is on a devpts or devfs filesystem.  Both
	  these filesystems automatically manage permissions on the /dev/pts
	  devices.  You may need to mount your devpts or devfs filesystem on
	  /dev/pts for this to work.

	  Most people should answer Y.

config UNIX98PTY_ONLY
	bool "Support only Unix 98 PTYs"
	default y
	depends on UCLIBC_HAS_PTY
	help
	  If you want to support only Unix 98 PTYs enable this.  Some older
	  applications may need this disabled and will thus use legacy BSD
	  style PTY handling which is more complex and also bigger than
	  Unix 98 PTY handling.

	  For most current programs, you can generally answer Y.

if UNIX98PTY_ONLY
config UCLIBC_HAS_GETPT
	bool "Support getpt() (glibc-compat)"
	depends on UCLIBC_HAS_PTY
	help
	  Some packages may need getpt().
	  All of those are non-standard and can be considered
	  GNU/libc compatibility.
	  Either use posix_openpt() or just open /dev/ptmx yourself.

	  If unsure, just say N.
endif

if !UNIX98PTY_ONLY
# Have to use __libc_ptyname{1,2}[] and related bloat
config UCLIBC_HAS_GETPT
	def_bool y
endif

config UCLIBC_HAS_LIBUTIL
	bool "Provide libutil library and functions"
	depends on UCLIBC_HAS_PTY
	help
	  Provide a libutil library.
	  This non-standard conforming library provides the following
	  utility functions:

	  forkpty(): combines openpty(), fork(2), and login_tty() to
	               create a new process operating in a pseudo-terminal.
	  login(): write utmp and wtmp entries
	  login_tty(): prepares for a login on the tty fd by creating a
	               new session, making fd the controlling terminal for
	               the calling process, setting fd to be the standard
	               input, output, and error streams of the current
	               process, and closing fd.
	  logout(): write utmp and wtmp entries
	  logwtmp(): constructs a utmp structure and calls updwtmp() to
	               append the structure to the utmp file.
	  openpty(): finds an available pseudo-terminal and returns
	               file descriptors for the master and slave

	  This library adds about 3k-4k to your system.

config UCLIBC_HAS_TM_EXTENSIONS
	bool "Support 'struct tm' timezone extension fields"
	default y
	help
	  Enabling this option adds fields to 'struct tm' in time.h for
	  tracking the number of seconds east of UTC, and an abbreviation for
	  the current timezone.  These fields are not specified by the SuSv3
	  standard, but they are commonly used in both GNU and BSD application
	  code.

	  To strictly follow the SuSv3 standard, leave this disabled.
	  Most people will probably want to answer Y.

config UCLIBC_HAS_TZ_CACHING
	bool "Enable caching of the last valid timezone 'TZ' string"
	default y
	help
	  Answer Y to enable caching of the last valid 'TZ' string describing
	  the timezone setting.  This allows a quick string compare to avoid
	  repeated parsing of unchanged 'TZ' strings when tzset() is called.

	  Most people will answer Y.

config UCLIBC_HAS_TZ_FILE
	bool "Enable '/etc/TZ' file support to set a default timezone (uClibc-specific)"
	default y
	help
	  Answer Y to enable the setting of a default timezone for uClibc.

	  Ordinarily, uClibc gets the timezone information exclusively from the
	  'TZ' environment variable.  In particular, there is no support for
	  the zoneinfo directory tree or the /etc/timezone file used by glibc.

	  With this option enabled, uClibc will use the value stored in the
	  file '/etc/TZ' (default path) to obtain timezone information if the
	  'TZ' environment variable is missing or has an invalid value.  The
	  file consists of a single line (newline required) of text describing
	  the timezone in the format specified for the TZ environment variable.

	  Doing 'echo CST6CDT > /etc/TZ' is enough to create a valid file.
	  See
	  http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html
	  for details on valid settings of 'TZ'.

	  Most people will answer Y.

config UCLIBC_HAS_TZ_FILE_READ_MANY
	bool "Repeatedly read the '/etc/TZ' file"
	depends on UCLIBC_HAS_TZ_FILE
	default y
	help
	  Answer Y to enable repeated reading of the '/etc/TZ' file even after
	  a valid value has been read.  This incurs the overhead of an
	  open/read/close for each tzset() call (explicit or implied).  However,
	  setting this will allow applications to update their timezone
	  information if the contents of the file change.

	  Most people will answer Y.

config UCLIBC_TZ_FILE_PATH
	string "Path to the 'TZ' file for setting the global timezone"
	depends on UCLIBC_HAS_TZ_FILE
	default "/etc/TZ"
	help
	  This is the path to the 'TZ' file.

	  Most people will use the default of '/etc/TZ'.

config UCLIBC_FALLBACK_TO_ETC_LOCALTIME
	bool "Use /etc/localtime as a fallback"
	depends on UCLIBC_HAS_TZ_FILE
	default y
	help
	  Answer Y to try to use /etc/localtime file.
	  On glibc systems this file (if it is in TZif2 format)
	  contains timezone string at the end.

	  Most people will answer Y.

endmenu

menu "Advanced Library Settings"

config UCLIBC_PWD_BUFFER_SIZE
	int "Buffer size for getpwnam() and friends"
	default 256
	range 12 1024
	help
	  This sets the value of the buffer size for getpwnam() and friends.
	  By default, this is 256. (For reference, glibc uses 1024).
	  The value can be found using sysconf() with the _SC_GETPW_R_SIZE_MAX
	  parameter.

config UCLIBC_GRP_BUFFER_SIZE
	int "Buffer size for getgrnam() and friends"
	default 256
	range 12 1024
	help
	  This sets the value of the buffer size for getgrnam() and friends.
	  By default, this is 256. (For reference, glibc uses 1024).
	  The value can be found using sysconf() with the _SC_GETGR_R_SIZE_MAX
	  parameter.

comment "Support various families of functions"

config UCLIBC_LINUX_SPECIFIC
	bool "Linux specific functions"
	default y
	help
	  accept4(), bdflush(),
	  capget(), capset(), eventfd(), fallocate(),
	  fstatfs(), getrandom(), inotify_*(), ioperm(), iopl(),
	  madvise(), modify_ldt(), pipe2(), personality(),
	  prctl()/arch_prctl(), pivot_root(), modify_ldt(),
	  ppoll(), readahead(), reboot(), remap_file_pages(),
	  sched_getaffinity(), sched_setaffinity(), sendfile(),
	  setfsgid(), setfsuid(), setresgid(), setresuid(),
	  splice(), vmsplice(), tee(), signalfd(), statfs(),
	  swapoff(), swapon(), sync_file_range(), syncfs(),
	  _sysctl(), sysinfo(), timerfd_*(), vhangup(), umount(),
	  umount2()

config UCLIBC_HAS_GNU_ERROR
	bool "Support GNU extensions for error-reporting"
	default y
	help
	  Support for the GNU-specific error(), error_at_line(),
	  void (* error_print_progname)(), error_message_count
	  functions and variables.  Some GNU packages
	  utilize these for extra useful output, but in general
	  are not required.

	  If unsure, just answer N.

config UCLIBC_BSD_SPECIFIC
	bool "BSD specific functions"
	default y
	help
	  mincore(), getdomainname(), setdomainname()

	  If unsure, say N.

config UCLIBC_HAS_BSD_ERR
	bool "BSD err functions"
	default y
	help
	  These functions are non-standard BSD extensions.
	  err(), errx(), warn(), warnx(), verr(), verrx(), vwarn(), vwarnx()

	  If unsure, say N.

config UCLIBC_HAS_OBSOLETE_BSD_SIGNAL
	bool "BSD obsolete signal functions"
	help
	  These functions are provided as a compatibility interface for
	  programs that make use of the historical System V signal API.
	  This API is obsolete:
	  new applications should use the POSIX signal API (sigaction(2),
	  sigprocmask(2), etc.).
	  Affected functions:

	  sigset(), sighold(), sigrelse(), sigignore()

	  If unsure, say N.

config UCLIBC_HAS_BSD_B64_NTOP_B64_PTON
	bool "Support b64_ntop(), b64_pton() (bsd-compat)"
	help
	  Answer Y if you need additional BSD compatibility
          (e.g. for openbsd-netcat).

	  Most people will say N.

config UCLIBC_HAS_OBSOLETE_SYSV_SIGNAL
	bool "SYSV obsolete signal functions"
	help
	  Use of sysv_signal() should be avoided; use sigaction(2) instead.

	  If unsure, say N.

config UCLIBC_NTP_LEGACY
	bool "ntp_*() aliases"
	help
	  Provide legacy aliases for ntp functions:
	  ntp_adjtime(), ntp_gettime()

	  It is safe to say N here.

config UCLIBC_SV4_DEPRECATED
	bool "Enable SVr4 deprecated functions"
	help
	  These functions are DEPRECATED in System V release 4.
	  Say N unless you desparately need one of the functions below:

	  ustat() [use statfs(2) in your code instead]

config UCLIBC_HAS_REALTIME
	bool "Realtime-related family of SUSv functions"
	default y
	help
	  These functions are part of the Timers option and need not
	  be available on all implementations.
	  Includes AIO, message-queue, scheduler, semaphore functions:

	  aio.h
	  mqueue.h
	  sched.h
	  semaphore.h

	  aio_cancel()
	  aio_error()
	  aio_fsync()
	  aio_read()
	  lio_listio()
	  aio_return()
	  aio_suspend()
	  aio_write()
	  clock_getres(), clock_gettime(), clock_settime()
	  fdatasync()
	  mlockall(), munlockall()
	  mlock(), munlock()
	  mq_close()
	  mq_getattr()
	  mq_notify()
	  mq_open()
	  mq_receive()
	  mq_send()
	  mq_setattr()
	  mq_unlink()
	  nanosleep()
	  sched_getparam()
	  sched_get_priority_max(), sched_get_priority_min()
	  sched_getscheduler()
	  sched_rr_get_interval()
	  sched_setparam()
	  sched_setscheduler()
	  sem_close()
	  sem_destroy()
	  sem_getvalue()
	  sem_init()
	  sem_open()
	  sem_post()
	  sem_trywait(), sem_wait()
	  sem_unlink()
	  sigqueue()
	  sigtimedwait(), sigwaitinfo()
	  timer_create()
	  timer_delete()
	  timer_getoverrun(), timer_gettime(), timer_settime()

config UCLIBC_HAS_ADVANCED_REALTIME
	bool "Advanced realtime-related family of SUSv functions"
	default y
	depends on UCLIBC_HAS_REALTIME
	help
	  These functions are part of the Timers option and need not
	  be available on all implementations.

	  clock_getcpuclockid()
	  clock_nanosleep()
	  mq_timedreceive()
	  mq_timedsend()
	  posix_fadvise()
	  posix_fallocate()
	  posix_madvise()
	  posix_memalign()
	  posix_mem_offset()
	  posix_spawnattr_destroy(), posix_spawnattr_init()
	  posix_spawnattr_getflags(), posix_spawnattr_setflags()
	  posix_spawnattr_getpgroup(), posix_spawnattr_setpgroup()
	  posix_spawnattr_getschedparam(), posix_spawnattr_setschedparam()
	  posix_spawnattr_getschedpolicy(), posix_spawnattr_setschedpolicy()
	  posix_spawnattr_getsigdefault(), posix_spawnattr_setsigdefault()
	  posix_spawnattr_getsigmask(), posix_spawnattr_setsigmask()
	  posix_spawn_file_actions_addclose()
	  posix_spawn_file_actions_adddup2()
	  posix_spawn_file_actions_addopen()
	  posix_spawn_file_actions_destroy()
	  posix_spawn_file_actions_init()
	  posix_spawn()
	  posix_spawnp()
	  posix_typed_mem_get_info()
	  pthread_mutex_timedlock()
	  sem_timedwait()

#config UCLIBC_HAS_TERMIOS
#	bool "termios functions"
#	default y
#	help
#	  Get and set terminal attributes, line control, get and set baud
#	  rate.
#	  termios(), tcgetattr(), tcsetattr(), tcsendbreak(), tcdrain(),
#	  tcflush(), tcflow(), cfmakeraw(), cfgetospeed(), cfgetispeed(),
#	  cfsetispeed(), cfsetospeed(), cfsetspeed()
#
#	  If unsure, say Y.

config UCLIBC_HAS_EPOLL
	bool "epoll"
	default y
	help
	  epoll_create(), epoll_ctl(), epoll_wait() functions.

config UCLIBC_HAS_XATTR
	bool "Extended Attributes"
	default y
	help
	  Extended Attributes support.

	  setxattr()
	  lsetxattr()
	  fsetxattr()
	  getxattr()
	  lgetxattr()
	  fgetxattr()
	  listxattr()
	  llistxattr()
	  flistxattr()
	  removexattr()
	  lremovexattr()
	  fremovexattr()

	  Say N unless you need support for extended attributes and the
	  filesystems do actually support them.

config UCLIBC_HAS_PROFILING
	bool "Profiling support"
	default y
	help
	  gcc's -finstrument-functions needs these.

	  Most people can safely answer N.

config UCLIBC_HAS_CRYPT_IMPL
	bool "libcrypt support"
	default y
	help
	  libcrypt contains crypt(), setkey() and encrypt()

config UCLIBC_HAS_SHA256_CRYPT_IMPL
	bool "libcrypt SHA256 support"
	depends on UCLIBC_HAS_CRYPT_IMPL
	help
	  This adds support for SHA256 password hashing via the crypt() function.
	  Say N here if you do not need SHA256 crypt support.

config UCLIBC_HAS_SHA512_CRYPT_IMPL
	bool "libcrypt SHA512 support"
	depends on UCLIBC_HAS_CRYPT_IMPL
	help
	  This adds support for SHA512 password hashing via the crypt() function.
	  Say N here if you do not need SHA512 crypt support.

config UCLIBC_HAS_CRYPT_STUB
	bool "libcrypt stubs"
	default y
	depends on !UCLIBC_HAS_CRYPT_IMPL
	help
	  Standards mandate that crypt(3) provides a stub if it is unavailable.
	  If you enable this option then stubs for
	    crypt(), setkey() and encrypt()
	  will be provided in a small libcrypt.

config UCLIBC_HAS_CRYPT
	def_bool y
	depends on UCLIBC_HAS_CRYPT_IMPL || UCLIBC_HAS_CRYPT_STUB
endmenu

menuconfig UCLIBC_HAS_NETWORK_SUPPORT
	bool "Networking Support"
	default y
	help
	  Say N here if you do not need network support.

if UCLIBC_HAS_NETWORK_SUPPORT
config UCLIBC_HAS_SOCKET
	bool "Socket support"
	default y
	help
	  If you want to include support for sockets then answer Y.

config UCLIBC_HAS_IPV4
	bool "IP version 4 support"
	default y
	select UCLIBC_HAS_SOCKET
	help
	  If you want to include support for the Internet Protocol
	  (IP version 4) then answer Y.

	  Most people will say Y.

config UCLIBC_HAS_IPV6
	bool "IP version 6 support"
	select UCLIBC_HAS_SOCKET
	help
	  If you want to include support for the next version of the Internet
	  Protocol (IP version 6) then answer Y.

	  Most people should answer N.

config UCLIBC_USE_NETLINK
	bool "Use netlink to query interfaces"
	depends on UCLIBC_HAS_SOCKET
	help
	  In newer versions of Linux (2.4.17+), support was added for querying
	  network device information via netlink rather than the old style
	  ioctl's.  Most of the time, the older ioctl style is sufficient (and
	  it is smaller than netlink), but if you find that not all of your
	  devices are being returned by the if_nameindex() function, you will
	  have to use the netlink implementation.

	  Most people can safely answer N.

config UCLIBC_SUPPORT_AI_ADDRCONFIG
	bool "Support the AI_ADDRCONFIG flag"
	depends on UCLIBC_USE_NETLINK
	help
	  The implementation of AI_ADDRCONFIG is aligned with the glibc
	  implementation using netlink to query interfaces to find both
	  ipv4 and ipv6 support. This is only needed if an application uses
	  the AI_ADDRCONFIG flag.

	  Most people can safely answer N.

config UCLIBC_HAS_BSD_RES_CLOSE
	bool "Support res_close() (bsd-compat)"
	help
	  Answer Y if you desperately want to support BSD compatibility in
	  the network code.

	  Most people will say N.

config UCLIBC_HAS_COMPAT_RES_STATE
	bool "Use compatible but bloated _res"
	default y
	help
	  Answer Y if you build network utilities and they muck with resolver
	  internals a lot (_res global structure). uclibc does not use most
	  of _res.XXX fields, and with this option OFF they won't even exist.
	  Which will make e.g. dig build fail.
	  Answering N saves around 400 bytes in bss.

config UCLIBC_HAS_EXTRA_COMPAT_RES_STATE
	bool "Use extra compatible but extra bloated _res"
	help
	  Answer Y if selecting UCLIBC_HAS_COMPAT_RES_STATE is not enough.
	  As far as I can say, this should never be needed.

config UCLIBC_HAS_RESOLVER_SUPPORT
	bool "DNS resolver functions"
	select UCLIBC_HAS_COMPAT_RES_STATE
	depends on UCLIBC_HAS_IPV4 || UCLIBC_HAS_IPV6
	help
	  Provide implementations for DNS resolver functions.
	  In particular, the following functions will be added to the
	  library:

	  ns_skiprr, ns_initparse, ns_parserr, ns_msg_getflag,
	  res_mkquery, res_init, res_ninit, res_close, res_nclose
	  res_query, res_search, res_querydomain,
	  dn_expand, dn_comp,
	  ns_name_uncompress, ns_name_ntop, ns_name_pton, ns_name_unpack,
	  ns_name_pack, ns_name_compress, ns_name_skip, dn_skipname,
	  ns_get16, ns_get32, ns_put16, ns_put32

choice
	prompt "DNS Query ID generation"
	default UCLIBC_DNSRAND_MODE_PRNGPLUS
	help
	  Control how successive dns query ids' are generated during
	  dns lookup.

config UCLIBC_DNSRAND_MODE_URANDOM
	bool "urandom"
	help
	  "urandom" uses /dev/urandom available under many unix flavours
	  to generate dns query id. This can generate good random ids,
	  by dipping into the entropy pool maintained by the system.
	  However this is relatively slow compared to the other options,
	  as it may involve cryptographic operations internally and
	  kernel-userspace handshake.

config UCLIBC_DNSRAND_MODE_CLOCK
	bool "clock"
	depends on UCLIBC_HAS_REALTIME
	help
	  "clock" uses CLOCK_REALTIME of the system to generate plausibly
	  random dns query id. Systems require to have clock source with
	  nanosec granularity mapped to this clock id for this to generate
	  plausibly random values. However has processor and io performances
	  improve in future, its effectiveness can get impacted.

config UCLIBC_DNSRAND_MODE_PRNGPLUS
	bool "prngplus"
	help
	  "prngplus" uses random prng available within uclibc, to indirectly
	  generate the dns query id. This tries to provide a good balance
	  between speed and randomness to an extent. It periodically reseeds
	  the prng using random value generated from either the urandom or
	  else the clock, if either of them is available. Additionally applies
	  transform (one way, if possible) on internal generated random values.
	  These make it difficult to infer internal state of prng from unbroken
	  sequences of exposed random values.
	  This is the default.

config UCLIBC_DNSRAND_MODE_SIMPLECOUNTER
	bool "simplecounter"
	help
	  "simplecounter" uses a simple counter to generate dns query id.
	  This is a very simple logic and can be subjected to dns poison
	  attack relatively easily.
	  It is recommended to avoid this option.

endchoice


endif


menu "String and Stdio Support"

config UCLIBC_HAS_STRING_GENERIC_OPT
	bool "Use faster (but larger) generic string functions"
	default y
	help
	  Answer Y to use the (tweaked) glibc generic string functions.

	  In general, they are faster (but 3-5K larger) than the base
	  uClibc string functions which are optimized solely for size.

	  Many people will answer Y.

config UCLIBC_HAS_STRING_ARCH_OPT
	bool "Use arch-specific assembly string functions (where available)"
	default y
	help
	  Answer Y to use any archtecture-specific assembly language string
	  functions available for this target plaform.

	  Note that assembly implementations are not available for all string
	  functions, so some generic (written in C) string functions may
	  still be used.

	  These are small and fast, the only reason _not_ to say Y here is
	  for debugging purposes.

config UCLIBC_HAS_STDIO_FUTEXES
	bool "Use futexes for multithreaded I/O locking"
	depends on UCLIBC_HAS_THREADS_NATIVE
	help
	  If you want to compile uClibc to use futexes for low-level
	  I/O locking, answer Y.  Otherwise, answer N.

config UCLIBC_HAS_CTYPE_TABLES
	bool "Use Table Versions Of 'ctype.h' Functions."
	default y
	help
	  Answer Y to use table versions of the 'ctype.h' functions.
	  While the non-table versions are often smaller when building
	  statically linked apps, they work only in stub locale mode.

	  Most people will answer Y.

config UCLIBC_HAS_CTYPE_SIGNED
	bool "Support Signed Characters In 'ctype.h' Functions."
	depends on UCLIBC_HAS_CTYPE_TABLES
	default y
	help
	  Answer Y to enable support for passing signed char values to
	  the 'ctype.h' functions.  ANSI/ISO C99 and SUSv3 specify that
	  these functions are only defined for unsigned char values and
	  EOF.  However, glibc allows negative signed char values as well
	  in order to support 'broken old programs'.

	  Most people will answer Y.

choice
	prompt "ctype argument checking"
	depends on UCLIBC_HAS_CTYPE_TABLES
	default UCLIBC_HAS_CTYPE_UNSAFE
	help
	  Please select the invalid arg behavior you want for the 'ctype'
	  functions.

	  The 'ctype' functions are now implemented using table lookups, with
	  the arg being the index.  This can result in incorrect memory accesses
	  or even segfaults for args outside of the allowed range.

	  NOTE: This only affects the 'ctype' _functions_.  It does not affect
	  the macro implementations.

config UCLIBC_HAS_CTYPE_UNSAFE
	bool "Do not check -- unsafe"

config UCLIBC_HAS_CTYPE_CHECKED
	bool "Detect and handle appropriately"

config UCLIBC_HAS_CTYPE_ENFORCED
	bool "Issue a diagnostic and abort()"

endchoice


config UCLIBC_HAS_WCHAR
	bool "Wide Character Support"
	help
	  Answer Y to enable wide character support.  This will make uClibc
	  much larger.  It is also currently required for locale support.

	  Most people will answer N.

config UCLIBC_HAS_LIBICONV
	bool "Iconv Support"
	select UCLIBC_HAS_WCHAR
	help
	  Add tiny iconv support for charset conversion from and to UTF-8.

config UCLIBC_HAS_LIBINTL
	bool "Intl stubs support"
	help
	  If you enable this option you get stubs for the gettext family of
	  functions.

config UCLIBC_HAS_LOCALE
	bool "Locale Support"
	select UCLIBC_HAS_WCHAR
	select UCLIBC_HAS_CTYPE_TABLES
	select UCLIBC_HAS_LIBICONV
	help
	  uClibc now has full ANSI/ISO C99 locale support (except for
	  wcsftime() and collating items in regex).  Be aware that enabling
	  this option will make uClibc much larger.

	  Enabling UCLIBC_HAS_LOCALE with the default set of supported locales
	  (169 UTF-8 locales, and 144 locales for other codesets) will enlarge
	  uClibc by around 300k.  You can reduce this size by building your own
	  custom set of locate data (see extra/locale/LOCALES for details).

	  uClibc's locale support is still under development.  For example,
	  codesets using shift states are not currently supported.  Support is
	  planned in the next iteration of locale support.

	  Answer Y to enable locale support.  Most people will answer N.

choice

prompt "Locale data"
	depends on UCLIBC_HAS_LOCALE
	default UCLIBC_BUILD_MINIMAL_LOCALE

config UCLIBC_BUILD_MINIMAL_LOCALE
	bool "Only selected locales"
	depends on UCLIBC_HAS_LOCALE
	help
	  If you do not need all locales that are available on your
	  host-box, then set this to 'Y'.

config UCLIBC_BUILD_ALL_LOCALE
	bool "All locales"
	depends on UCLIBC_HAS_LOCALE
	help
	  This builds all the locales that are available on your
	  host-box.

endchoice

config UCLIBC_BUILD_MINIMAL_LOCALES
	string "locales to use"
	depends on UCLIBC_BUILD_MINIMAL_LOCALE
	default "en_US"
	help
	  Space separated list of locales to use.

	  E.g.:
	      en_US en_GB de_AT
	  default:
	      en_US

config UCLIBC_HAS_XLOCALE
	bool "Extended Locale Support (experimental/incomplete)"
	depends on UCLIBC_HAS_LOCALE
	help
	  Answer Y to enable extended locale support similar to that provided
	  by glibc.  This is primarily intended to support libstd++
	  functionality.
	  However, it also allows thread-specific locale selection via
	  uselocale().

	  Most people will answer N.

config UCLIBC_HAS_HEXADECIMAL_FLOATS
	bool "Support hexadecimal float notation"
	depends on UCLIBC_HAS_CTYPE_TABLES
	depends on UCLIBC_HAS_FLOATS
	help
	  Answer Y to enable support for hexadecimal float notation in the
	  (wchar and) char string to floating point conversion functions, as
	   well as support for the %a and %A conversion specifiers in the
	   *printf() and *scanf() functions.

	  Most people will answer N.

config UCLIBC_HAS_GLIBC_DIGIT_GROUPING
	bool "Support glibc's \"'\" flag for allowing locale-specific digit grouping"
	depends on UCLIBC_HAS_LOCALE
	depends on UCLIBC_HAS_FLOATS
	help
	  Answer Y to enable support for glibc's \"'\" flag for allowing
	  locale-specific digit grouping in base 10 integer conversions and
	  appropriate floating point conversions in the *printf() and *scanf()
	  functions.

	  Most people will answer N.

config UCLIBC_HAS_SCANF_LENIENT_DIGIT_GROUPING
	bool "Do not require digit grouping when the \"'\" flag is specified"
	depends on UCLIBC_HAS_GLIBC_DIGIT_GROUPING
	default y
	help
	  Answer Y to make digit grouping optional when the \"'\" flag is
	  specified.
	  This is the standard glibc behavior.  If the initial string of digits
	  exceeds the maximum group number, the input will be treated as a
	  normal non-grouped number.

	  Most people will answer N.

config UCLIBC_HAS_GLIBC_CUSTOM_PRINTF
	bool "Support glibc's register_printf_function() (glibc-compat)"
	depends on !USE_OLD_VFPRINTF
	help
	  Answer Y to support glibc's register_printf_function() to allow an
	  application to add its own printf conversion specifiers.
	  parse_printf_format() is also enabled.

	  NOTE: Limits the number or registered specifiers to 10.
	  NOTE: Requires new conversion specifiers to be ASCII
	        characters (0-0x7f).  This is to avoid problems with processing
	        format strings in locales with different multibyte conversions.

	  Most people will answer N.

config USE_OLD_VFPRINTF
	bool "Use the old vfprintf implementation"
	depends on !UCLIBC_HAS_WCHAR
	help
	  Set to true to use the old vfprintf instead of the new.  This is
	  roughly C89 compliant with some extensions, and is much smaller.
	  However, it does not support wide chars, positional args, or glibc
	  custom printf specifiers.

	  Most people will answer N.

config UCLIBC_PRINTF_SCANF_POSITIONAL_ARGS
	int "Maximum number of positional args.  Either 0 or >= 9."
	depends on !USE_OLD_VFPRINTF
	default 9
	help
	  Set the maximum number of positional args supported by the
	  printf/scanf functions.  The Single Unix Specification Version 3
	  requires a minimum value of 9.  Setting this to a value lower than
	  9 will disable positional arg support and cause the NL_ARGMAX macro
	  in limits.h to be #undef'd.

	  WARNING!  The workspace to support positional args is currently
	            allocated on the stack.  You probably don't want to set
		    this to too high a value.

	  Most people will answer 9.

choice
	prompt "Stdio buffer size"
	default UCLIBC_HAS_STDIO_BUFSIZ_4096
	help
	  Please select a value for BUFSIZ.  This will be used by the
	  stdio subsystem as the default buffer size for a file, and
	  affects fopen(), setvbuf(), etc.

	  NOTE: Setting this to 'none' will disable buffering completely.
	  However, BUFSIZ will still be defined in stdio.h as 256 because
	  many applications use this value.

config UCLIBC_HAS_STDIO_BUFSIZ_NONE
	bool "none (WARNING - BUFSIZ will be 256 in stdio.h)"
	depends on !UCLIBC_HAS_WCHAR

config UCLIBC_HAS_STDIO_BUFSIZ_256
	bool "256 (minimum ANSI/ISO C99 value)"

config UCLIBC_HAS_STDIO_BUFSIZ_512
	bool "512"

config UCLIBC_HAS_STDIO_BUFSIZ_1024
	bool "1024"

config UCLIBC_HAS_STDIO_BUFSIZ_2048
	bool "2048"

config UCLIBC_HAS_STDIO_BUFSIZ_4096
	bool "4096"

config UCLIBC_HAS_STDIO_BUFSIZ_8192
	bool "8192"

# If you add more choices, you will need to update uClibc_stdio.h.

endchoice

choice
	prompt "Stdio builtin buffer size (uClibc-specific)"
	depends on !UCLIBC_HAS_STDIO_BUFSIZ_NONE
	default UCLIBC_HAS_STDIO_BUILTIN_BUFFER_NONE
	help
	  When a FILE is created with fopen(), an attempt is made to allocate
	  a BUFSIZ buffer for it.  If the allocation fails, fopen() will still
	  succeed but the FILE will be unbuffered.

	  This option adds a small amount of space to each FILE to act as an
	  emergency buffer in the event of a buffer allocation failure.

	  Most people will answer None.

config UCLIBC_HAS_STDIO_BUILTIN_BUFFER_NONE
	bool "None"

config UCLIBC_HAS_STDIO_BUILTIN_BUFFER_4
	bool "4"

config UCLIBC_HAS_STDIO_BUILTIN_BUFFER_8
	bool "8"

# If you add more choices, you will need to update uClibc_stdio.h.

endchoice

config UCLIBC_HAS_STDIO_SHUTDOWN_ON_ABORT
	bool "Attempt to shutdown stdio subsystem when abort() is called."
	help
	  ANSI/ISO C99 requires abort() to be asyn-signal-safe.  So there was
	  a behavioral change made in SUSv3.  Previously, abort() was required
	  to have the affect of fclose() on all open streams.  The wording has
	  been changed to "may" from "shall".

	  Most people will answer N.

config UCLIBC_HAS_STDIO_GETC_MACRO
	bool "Provide a macro version of getc()"
	depends on !UCLIBC_HAS_STDIO_BUFSIZ_NONE
	default y
	help
	  Provide a macro version of getc().

	  Most people will answer Y.

config UCLIBC_HAS_STDIO_PUTC_MACRO
	bool "Provide a macro version of putc()"
	depends on !UCLIBC_HAS_STDIO_BUFSIZ_NONE
	default y
	help
	  Provide a macro version of putc().

	  Most people will answer Y.

config UCLIBC_HAS_STDIO_AUTO_RW_TRANSITION
	bool "Support auto-r/w transition"
	default y
	help
	  Answer Y to enable the stdio subsystem to automaticly transition
	  between reading and writing.  This relaxes the ANSI/ISO C99
	  requirement:

	  When a file is opened with update mode ('+' as the second or third
	  character in the list of mode argument values), both input and output
	  may be performed on the associated stream. However, output shall not
	  be directly followed by input without an intervening call to the
	  fflush function or to a file positioning function (fseek, fsetpos,
	  or rewind), and input shall not be directly followed by output without
	  an intervening call to a file positioning function, unless the input