uclibc-ng/extra/Configs/Config.in

#
# For a description of the syntax of this configuration file,
# see extra/config/Kconfig-language.txt
#
mainmenu "uClibc C Library Configuration"


choice
	prompt "Target Architecture"
	default TARGET_I386
	help
	  Stuff

config TARGET_ALPHA
	bool "alpha"

config TARGET_ARM
	bool "arm"

config TARGET_CRIS
	bool "cris"

config TARGET_E1
	bool "e1"

config TARGET_H8300
	bool "h8300"

config TARGET_I386
	bool "i386"

config TARGET_I960
	bool "i960"

config TARGET_M68K
	bool "m68k"

config TARGET_MICROBLAZE
	bool "microblaze"

config TARGET_MIPS
	bool "mips"

config TARGET_POWERPC
	bool "powerpc"

config TARGET_SH
	bool "SuperH"

config TARGET_SPARC
	bool "sparc"

config TARGET_V850
	bool "v850"

endchoice


menu "Target Architecture Features and Options"

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

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

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

if TARGET_E1
source "extra/Configs/Config.e1"
endif

if TARGET_H8300
source "extra/Configs/Config.h8300"
endif

if TARGET_I386
source "extra/Configs/Config.i386"
endif

if TARGET_I960
source "extra/Configs/Config.i960"
endif

if TARGET_M68K
source "extra/Configs/Config.m68k"
endif

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

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

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

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

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

if TARGET_V850
source "extra/Configs/Config.v850"
endif



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

endmenu

menu "General Library Settings"

config HAVE_NO_PIC
	bool
	default n

config DOPIC
	bool "Generate Position Independent Code (PIC)"
	default y
	depends !HAVE_NO_PIC
	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 HAVE_SHARED
	bool "Enable support for shared libraries"
	depends on DOPIC
	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 BUILD_UCLIBC_LDSO
	bool "Compile native shared library loader"
	depends on HAVE_SHARED
	default y
	help
	  uClibc has a native shared library loader for some architectures.
	  If you answer Y here, the uClibc native shared library loader will
	  be built for your target architecture.  If this option is available,
	  to you, then you almost certainly want to answer Y.

config FORCE_SHAREABLE_TEXT_SEGMENTS
	bool "Only load shared libraries which can share their text segment"
	depends on BUILD_UCLIBC_LDSO && UCLIBC_COMPLETELY_PIC
	default n
	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). So 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 makes 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 shared library loader 'ldd' support"
	depends on BUILD_UCLIBC_LDSO
	default y
	help
	  Enable this to 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 makes uClibc's
	  shared library loader a little bit smaller.  Most people will answer Y.

config UCLIBC_CTOR_DTOR
	bool "Support global constructors and destructors"
	default y
	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 UCLIBC_PROFILING
	bool "Support gprof profiling"
	default y
	help
	  If you wish to build uClibc with support for application profiling
	  using the gprof tool, then you should enable this feature.  Then in
	  addition to building uClibc with profiling support, you will also
	  need to recompile all your shared libraries with the profiling
	  enabled version of uClibc.  To add profiling support to your
	  applications, you must compile things using the gcc options
	  "-fprofile-arcs  -pg".  Then when you run your applications, a
	  gmon.out file will be generated which can then be analyzed by
	  'gprof'.  

	  These exist a number of less invasive alternatives that do not
	  require your to specially instrument your application, and recompile
	  and relink everything.  
	  
	  Many people have had good results using the combination of Valgrind 
	  to generate profiling information and KCachegrind for analysis:
		  http://developer.kde.org/~sewardj/
		  http://kcachegrind.sourceforge.net/

	  The OProfile system-wide profiler is another alternative:
		  http://oprofile.sourceforge.net/

	  Prospect is another alternative based on OProfile:
		  http://prospect.sourceforge.net/

	  And the Linux Trace Toolkit (LTT) is also a fine tool:
		http://www.opersys.com/LTT/

	  If none of these tools do what you need, you can of course enable
	  this option, rebuild everything, and use 'gprof'.  There is both a
	  size and performance penalty to profiling your applications this way,
	  so most people should answer N.

config UCLIBC_HAS_THREADS
	bool "POSIX Threading Support"
	default y
	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.

	  If your applications require pthreads, answer Y.

config PTHREADS_DEBUG_SUPPORT
	bool "Build pthreads debugging support"
	default n
	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_LFS
	bool "Large File Support"
	default y
	depends on !CONFIG_CRIS
	help
	  If you wish to build uClibc with support for accessing large files 
	  (i.e. files greater then 2 GiB) then answer Y.  Do not enable this 
	  if you are using an older Linux kernel (2.0.x) that lacks large file 
	  support.  Enabling this option will increase the size of uClibc.

choice
	prompt "Malloc Implementation"
	default MALLOC_930716
	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.

	  "malloc-930716" is derived from libc-5.3.12 and uses the brk() system call
	  for all memory allocations.  This makes it very fast.  It is also pretty
	  smart about reusing already allocated memory, and minimizing memory wastage.
	  Because this uses brk() it will not work on uClinux MMU-less systems.

	  If unsure, answer "malloc".

config MALLOC
	bool "malloc"

config MALLOC_930716
	bool "malloc-930716"
	depends on UCLIBC_HAS_MMU

endchoice

config MALLOC_GLIBC_COMPAT
	bool "Malloc returns live pointer for malloc(0)"
	default n
	help
	  The behavior of malloc(0) is listed as implementation-defined by
	  SuSv3.  Glibc returns a valid pointer to something, while uClibc
	  normally return a NULL.  I personally feel glibc's behavior is
	  not particularly safe, and allows buggy applications to hide very
	  serious problems.

	  When this option is enabled, uClibc will act just like glibc, and
	  return a live pointer when someone calls malloc(0).  This pointer
	  provides a malloc'ed area with a size of 1 byte.  This feature is
	  mostly useful when dealing with applications using autoconf's broken
	  AC_FUNC_MALLOC macro (which  redefines malloc as rpl_malloc if it
	  does not detect glibc style returning-a-valid-pointer-for-malloc(0)
	  behavior).  Most people can safely answer N.

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 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 UNIX98PTY_ONLY
	bool "Support only Unix 98 PTYs"
	default y
	help
	  If you want to support only Unix 98 PTYs enable this.  Some older
	  applications may need this disabled.  For most current programs, 
	  you can generally answer Y.

config ASSUME_DEVPTS
	bool "Assume that /dev/pts is a devpts or devfs file system"
	default y
	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 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.

	  Simply 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 allows 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'.

endmenu

menu "Networking Support"

config UCLIBC_HAS_IPV6
	bool "IP version 6 Support"
	default n
	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_HAS_RPC
	bool "Remote Procedure Call (RPC) support"
	default n
	help
	  If you want to include RPC support, enable this.  RPC is rarely used 
	  for anything except for the NFS filesystem.  Unless you plan to use NFS, 
	  you can probably leave this set to N and save some space.  If you need
	  to use NFS then you should answer Y.

config UCLIBC_HAS_FULL_RPC
	bool "Full RPC support"
	depends on UCLIBC_HAS_RPC
	default y if !HAVE_SHARED
	help
	  Normally we enable just enough RPC support for things like rshd and
	  nfs mounts to work.  If you find you need the rest of the RPC stuff, 
	  then enable this option.  Most people can safely answer N.

endmenu


menu "String and Stdio Support"

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
	  staticly 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 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 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"
	default n
	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_LOCALE
	bool "Locale Support"
	select UCLIBC_HAS_WCHAR
	select UCLIBC_HAS_CTYPE_TABLES
	default n
	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.

config UCLIBC_PREGENERATED_LOCALE_DATA
	bool "Use Pre-generated Locale Data"
	depends on UCLIBC_HAS_LOCALE
	default n
	help
	  If you are selective and only want locale data for a few particular
	  locales, or you enjoy pain, or you are a rabid do-it-yourself sort of
	  person, you can turn this option off and manually walk through the
	  mostly undocumented procedure needed to generate your own locale
	  data.

	  Mere mortals will answer Y and use the default set of pregenerated
	  locale data, which supports 169 UTF-8 locales, and 144 locales for
	  other codesets (for the complete list see extra/locale/LOCALES).

config UCLIBC_DOWNLOAD_PREGENERATED_LOCALE_DATA
	bool "Automagically Download the Pre-generated Locale Data (if necessary)"
	depends on UCLIBC_PREGENERATED_LOCALE_DATA
	default n
	help
	  If you would like the build process to use 'wget' to automatically
	  download the pregenerated locale data, enable this option.  Otherwise
	  you will need to obtain the locale data yourself from:
		http://www.uclibc.org/downloads/uClibc-locale-030818.tgz
	  and place the uClibc-locale-030818.tgz tarball in the extra/locale/
	  directory.

	  Go ahead and make life easy for yourself... Answer Y.

config UCLIBC_HAS_XLOCALE
	bool "Extended Locale Support (experimental/incomplete)"
	depends on UCLIBC_HAS_LOCALE
	default n
	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 UCLIBC_HAS_CTYPE_TABLES
	depends on UCLIBC_HAS_FLOATS
	default n
	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
	default n
	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
	default n
	help
	  Answer Y to support glibc's register_printf_function() to allow an
	  application to add its own printf conversion specifiers.

	  NOTE: This implementation limits the number or registered specifiers to 10.
	  NOTE: This implementation 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
	default n
	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.


config UCLIBC_HAS_SCANF_GLIBC_A_FLAG
	bool "Support glibc's 'a' flag for scanf string conversions"
	default n
	help
	  NOTE!!!  Currently Not Implemented!!! Just A Place Holder!!  NOTE!!!

	  Answer Y to enable support for glibc's 'a' flag for the scanf string
	  conversions '%s', '%[', '%ls', '%l[', and '%S'.  This is used to
	  auto-allocate sufficient memory to hold the data retrieved.

	  Most people will answer N.

choice
	prompt "Stdio buffer size"
	default UCLIBC_HAS_STDIO_BUFSIZ_256
	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 !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 !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_GETC_MACRO
	bool "Provide a macro version of getc()"
	depends !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 !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 operation encounters end­of­file.

	  Most people will answer Y.

config UCLIBC_HAS_FOPEN_LARGEFILE_MODE
	bool "Support an fopen() 'F' flag for large file mode (uClibc-specific)"
	depends on UCLIBC_HAS_LFS
	default n
	help
	  Answer Y to enable a uClibc-specific extension to allow passing an
	  additional 'F' flag in the mode string for fopen() to specify that
	  the file should be open()ed with the O_LARGEFILE flag set.

	  Most people will answer N.

config UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE
	bool "Support an fopen() 'x' flag for exclusive mode (glibc-compat)"
	default n
	help
	  Answer Y to support a glibc extension to allow passing
	  additional 'x' flag in the mode string for fopen() to specify that
	  the file should be open()ed with the O_EXCL flag set.

	  Most people will answer N.

config UCLIBC_HAS_GLIBC_CUSTOM_STREAMS
	bool "Support fmemopen(), open_memstream(), and fopencookie() (glibc-compat)"
	default n
	help
	  Answer Y to support the glibc 'custom stream' extension functions
	  fmemopen(), open_memstream(), and fopencookie().

	  NOTE: There are some minor differences regarding seeking behavior.

	  Most people will answer N.

config UCLIBC_HAS_PRINTF_M_SPEC
	bool "Support the '%m' specifier in printf format strings (glibc-compat)"
	default n
	help
	  Answer Y to support a glibc extension to interpret '%m' in printf
	  format strings as an instruction to output the error message string
	  (as generated by strerror) corresponding to the current value of 'errno'.

	  Most people will answer N.

config UCLIBC_HAS_ERRNO_MESSAGES
	bool "Include the errno message text in the library"
	default y
	help
	  Answer Y if you want to include the errno message text in the
	  library.  This adds about 3K to the library, but enables strerror()
	  to generate text other than 'Unknown error <number>'.

	  Most people will answer Y.

config UCLIBC_HAS_SYS_ERRLIST
	bool "Support sys_errlist[] (obsolete-compat)"
	depends on UCLIBC_HAS_ERRNO_MESSAGES
	default n
	help
	  Answer Y if you want to support the obsolete sys_errlist[].
	  This adds about 0.5k to the library, except for the mips
	  arch where it adds over 4K.

	  WARNING!  In the future, support for sys_errlist[] may be unavailable
	  in at least some configurations.  In fact, it may be removed altogether.

	  Most people will answer N.

config UCLIBC_HAS_SIGNUM_MESSAGES
	bool "Include the signum message text in the library"
	default y
	help
	  Answer Y if you want to include the signum message text in the
	  library.  This adds about 0.5K to the library, but enables strsignal()
	  to generate text other than 'Unknown signal <number>'.

	  Most people will answer Y.

config UCLIBC_HAS_SYS_SIGLIST
	bool "Support sys_siglist[] (bsd-compat)"
	depends on UCLIBC_HAS_SIGNUM_MESSAGES
	default n
	help
	  Answer Y if you want to support sys_siglist[].

	  WARNING!  In the future, support for sys_siglist[] may be unavailable
	  in at least some configurations.  In fact, it may be removed altogether.

	  Most people will answer N.

config UCLIBC_HAS_GETTEXT_AWARENESS
	bool "Include gettext awareness"
	depends on UCLIBC_HAS_LOCALE
	default n
	help
	  NOTE!!!  Not yet integrated with strerror and strsignal.  NOTE!!!

	  Answer Y if you want to include weak stub gettext support and
	  make the *strerror*() and strsignal() functions gettext-aware.

	  Currently, to get functional gettext functionality you will need
	  to use gnu gettext.

	  Most people will answer N.

config UCLIBC_HAS_GNU_GETOPT
	bool "Support gnu getopt"
	default y
	help
	  Answer Y if you want to include full gnu getopt() instead of a
	  (much smaller) SUSv3 compatible getopt().

	  Most people will answer Y.

endmenu


menu "Big and Tall"

config UCLIBC_HAS_REGEX
	bool "Regular Expression Support"
	default y
	help
	  POSIX regular expression code is really big -- 27k all by itself.
	  If you don't use regular expressions, turn this off and save space.
	  Of course, if you only staticly link, leave this on, since it will
	  only be included in your apps if you use regular expressions.

config UCLIBC_HAS_WORDEXP
	bool "Support the wordexp() interface"
	default n
	help
	  The SuSv3 wordexp() interface performs word expansions per the  Shell
	  and Utilities volume of IEEE Std 1003.1-2001, Section 2.6.  It is
	  intended for use by applications that want to implement all of the
	  standard Bourne shell expansions on input data.

	  This interface is rarely used, and very large.  Unless you have a
	  pressing need for wordexp(), you should probably answer N.

config UCLIBC_HAS_FTW
	bool "Support the ftw() and nftw() interfaces"
	default n
	help
	  The SuSv3 ftw() and nftw() interfaces are used to recursively descend 
	  directory paths while repeatedly calling a function.

	  This interface is rarely used, and adds around 4.5k.  Unless you have
	  a pressing need for ftw() or nftw(), you should probably answer N.

config UCLIBC_HAS_GLOB
	bool "Support the glob() interface"
	default y
	help

	  The glob interface is somewhat large (weighing in at about 4k).  It
	  is used fairly often, but is an option since people wanting to go for
	  absolute minimum size may wish to omit it. 

	  Most people will answer Y.

endmenu




menu "Library Installation Options"

config SHARED_LIB_LOADER_PREFIX
	string "Shared library loader path"
	depends on BUILD_UCLIBC_LDSO
	default "$(DEVEL_PREFIX)/lib"
	help
	  When using shared libraries, this path is the location where the
	  shared library will be invoked.  This value will be compiled into
	  every binary compiled with uClibc.

	  For a typical target system this should be set to "/lib", such that
	  'make install' will install /lib/ld-uClibc.so.0.

	  BIG FAT WARNING:
	  If you do not have a shared library loader with the correct name
	  sitting in the directory this points to, your binaries will not 
	  run.

config SYSTEM_LDSO
	string "System shared library loader"
	depends on HAVE_SHARED && !BUILD_UCLIBC_LDSO
	default "/lib/ld-linux.so.2"
	help
	  If you are using shared libraries, but do not want/have a native
	  uClibc shared library loader, please specify the name of your
	  target system's shared library loader here...

	  BIG FAT WARNING:
	  If you do not have a shared library loader with the correct name
	  sitting in the directory this points to, your binaries will not 
	  run.

config RUNTIME_PREFIX
	string "uClibc runtime library directory"
	default "/usr/$(TARGET_ARCH)-linux-uclibc/"
	help
	  RUNTIME_PREFIX is the directory into which the uClibc runtime
	  libraries will be installed.   The result will look something
	  like the following:
	      $(RUNTIME_PREFIX)/
	          lib/            <contains all runtime libraries>
	          bin/ldd         <the ldd utility program>
	          sbin/ldconfig   <the ldconfig utility program>
	  This value is used by the 'make install' Makefile target.  Since this
	  directory is compiled into the shared library loader, you will need to
	  recompile uClibc if you change this value...

	  For a typical target system this should be set to "/", such that
	  'make install' will install /lib/libuClibc-<VERSION>.so

config DEVEL_PREFIX
	string "uClibc development environment directory"
	default "/usr/$(TARGET_ARCH)-linux-uclibc/usr/"
	help
	  DEVEL_PREFIX is the directory into which the uClibc development
	  environment will be installed.   The result will look something
	  like the following:
	      $(DEVEL_PREFIX)/
	          lib/            <contains static libs>
		  include/        <Where all the header files go>
	  This value is used by the 'make install' Makefile target when
	  installing a uClibc development environment.

	  For a typical target system this should be set to "/usr", such that
	  'make install' will install /usr/include/<header files>.

endmenu

menu "uClibc development/debugging options"

config DODEBUG
	bool "Build uClibc with debugging symbols"
	default n
	help
	  Say Y here if you wish to compile uClibc with debugging symbols.
	  This will allow you to use a debugger to examine uClibc internals
	  while applications are running.  This increases the size of the
	  library considerably and should only be used when doing development.
	  If you are doing development and want to debug uClibc, answer Y.

	  Otherwise, answer N.

config DOASSERTS
	bool "Build uClibc with run-time assertion testing"
	default n
	help
	  Say Y here to include runtime assertion tests.
	  This enables runtime assertion testing in some code, which can
	  increase the size of the library and incur runtime overhead.
	  If you say N, then this testing will be disabled.

config SUPPORT_LD_DEBUG
	bool "Build the shared library loader with debugging support"
	depends on BUILD_UCLIBC_LDSO
	default n
	help
	  Answer Y here to enable all the extra code needed to debug the uClibc
	  native shared library loader.  The level of debugging noise that is
	  generated depends on the LD_DEBUG environment variable...  Just set
	  LD_DEBUG to something like: 'LD_DEBUG=token1,token2,..  prog' to
	  debug your application.  Diagnostic messages will then be printed to
	  the stderr.

	  For now these debugging tokens are available:
	    detail        provide more information for some options
	    move          display copy processing
	    symbols       display symbol table processing
	    reloc         display relocation processing; detail shows the relocation patch
	    nofixups      never fixes up jump relocations
	    bindings      displays the resolve processing (function calls); detail shows the relocation patch
	    all           Enable everything!

	  The additional environment variable:
	    LD_DEBUG_OUTPUT=file
	  redirects the diagnostics to an output file created using
	  the specified name and the process id as a suffix.

	  An excellent start is simply:
	    $ LD_DEBUG=binding,move,symbols,reloc,detail ./appname
	  or to log everything to a file named 'logfile', try this
	    $ LD_DEBUG=all LD_DEBUG_OUTPUT=logfile ./appname

	  If you are doing development and want to debug uClibc's shared library
	  loader, answer Y.  Mere mortals answer N.

config SUPPORT_LD_DEBUG_EARLY
	bool "Build the shared library loader with early debugging support"
	depends on BUILD_UCLIBC_LDSO
	default n
	help
	  Answer Y here to if you find the uClibc shared library loader is
	  crashing or otherwise not working very early on.  This is typical
	  only when starting a new port when you haven't figured out how to
	  properly get the values for argc, argv, environ, etc.  This method
	  allows a degree of visibility into the very early shared library
	  loader initialization process.  If you are doing development and want
	  to debug the uClibc shared library loader early initialization,
	  answer Y.  Mere mortals answer N.

config UCLIBC_MALLOC_DEBUGGING
	bool "Build malloc with debugging support"
	depends MALLOC
	default n
	help
	  Answer Y here to compile extra debugging support code into malloc.
	  Malloc debugging output may then be enabled at runtime using the
	  MALLOC_DEBUG environment variable.

	  The value of MALLOC_DEBUG should be an integer, which is interpreted as
	  a bitmask with the following bits:
		  1   -  do extra consistency checking
		  2   -  output messages for malloc/free calls and OS allocation calls
		  4   -  output messages for the `MMB' layer
		  8   -  output messages for internal malloc heap manipulation calls
	  
	  Because this increases the size of malloc appreciably (due to strings
	  etc), you should say N unless you need to debug a malloc problem.

config UCLIBC_MJN3_ONLY
	bool "Manuel's hidden warnings"
	default n
	help
	  Answer Y here to see all Manuel's personal notes, warnings, and todos.

	  Most people will answer N.

endmenu