path: root/toolchain/eglibc/config/Config.in

config EGLIBC_OPTION_EGLIBC_ADVANCED_INET6
	bool "IPv6 Advanced Sockets API support (RFC3542)"
	default y
	select EGLIBC_OPTION_EGLIBC_INET
	help
	  This option group includes the functions specified by RFC 3542,
	  "Advanced Sockets Application Program Interface (API) for
	  IPv6".

	  This option group includes the following functions:

		inet6_opt_append
		inet6_opt_find
		inet6_opt_finish
		inet6_opt_get_val
		inet6_opt_init
		inet6_option_alloc
		inet6_option_append
		inet6_option_find
		inet6_option_init
		inet6_option_next
		inet6_option_space
		inet6_opt_next
		inet6_opt_set_val
		inet6_rth_add
		inet6_rth_getaddr
		inet6_rth_init
		inet6_rth_reverse
		inet6_rth_segments
		inet6_rth_space


config EGLIBC_OPTION_EGLIBC_BACKTRACE
	bool "Functions for producing backtraces"
	default y
	help
	  This option group includes functions for producing a list of
	  the function calls that are currently active in a thread, from
	  within the thread itself.  These functions are often used
	  within signal handlers, to produce diagnostic output.

	  This option group includes the following functions:

		backtrace
		backtrace_symbols
		backtrace_symbols_fd


config EGLIBC_OPTION_EGLIBC_BIG_MACROS
	bool "Use extensive inline code"
	default y
	help
	  This option group specifies whether certain pieces of code
	  should be inlined to achieve maximum speed.  If this option
	  group is not selected, function calls will be used instead,
	  hence reducing the library footprint.


config EGLIBC_OPTION_EGLIBC_BSD
	bool "BSD-specific functions, and their compatibility stubs"
	default y
	help
	  This option group includes functions specific to BSD kernels.
	  A number of these functions have stub versions that are also
	  included in libraries built for non-BSD systems for
	  compatibility.

	  This option group includes the following functions:

		chflags
		fchflags
		lchmod
		revoke
		setlogin


config EGLIBC_OPTION_EGLIBC_CXX_TESTS
	bool "Tests that link against the standard C++ library."
	default y
	select EGLIBC_OPTION_POSIX_WIDE_CHAR_DEVICE_IO
	select EGLIBC_OPTION_EGLIBC_LIBM
	help
	  This option group does not include any C library functions;
	  instead, it controls which EGLIBC tests an ordinary 'make
	  tests' runs.  With this group disabled, tests that would
	  normally link against the standard C++ library are not
	  run.

	  The standard C++ library depends on the math library 'libm' and
	  the wide character I/O functions included in EGLIBC.  If those
	  option groups are disabled, this test must also be disabled.


config EGLIBC_OPTION_EGLIBC_CATGETS
	bool "Functions for accessing message catalogs"
	default y
	select EGLIBC_OPTION_EGLIBC_LOCALE_CODE
	help
	  This option group includes functions for accessing message
	  catalogs: catopen, catclose, and catgets.

	  This option group depends on the EGLIBC_OPTION_EGLIBC_LOCALE_CODE
	  option group; if you disable that, you must also disable this.


config EGLIBC_OPTION_EGLIBC_CHARSETS
	bool "iconv/gconv character set conversion libraries"
	default y
	help

	  This option group includes support for character sets other
	  than ASCII (ANSI_X3.4-1968) and Unicode and ISO-10646 in their
	  various encodings.  This affects both the character sets
	  supported by the wide and multibyte character functions, and
	  those supported by the 'iconv' functions.

	  With this option group disabled, EGLIBC supports only the
	  following character sets:

		ANSI_X3.4         - ASCII
		ANSI_X3.4-1968
		ANSI_X3.4-1986
		ASCII
		CP367
		CSASCII
		IBM367
		ISO-IR-6
		ISO646-US
		ISO_646.IRV:1991
		OSF00010020
		US
		US-ASCII

		10646-1:1993      - ISO 10646, in big-endian UCS4 form
		10646-1:1993/UCS4
		CSUCS4
		ISO-10646
		ISO-10646/UCS4
		OSF00010104
		OSF00010105
		OSF00010106
		UCS-4
		UCS-4BE
		UCS4

		UCS-4LE           - ISO 10646, in little-endian UCS4 form

		ISO-10646/UTF-8   - ISO 10646, in UTF-8 form
		ISO-10646/UTF8
		ISO-IR-193
		OSF05010001
		UTF-8
		UTF8

		ISO-10646/UCS2    - ISO 10646, in target-endian UCS2 form
		OSF00010100
		OSF00010101
		OSF00010102
		UCS-2
		UCS2

		UCS-2BE           - ISO 10646, in big-endian UCS2 form
		UNICODEBIG

		UCS-2LE           - ISO 10646, in little-endian UCS2 form
		UNICODELITTLE

		WCHAR_T           - EGLIBC's internal form (target-endian,
							32-bit ISO 10646)


config EGLIBC_OPTION_EGLIBC_CRYPT
	bool "Encryption library"
	default y
	help
	  This option group includes the `libcrypt' library which
	  provides functions for one-way encryption.  Supported
	  encryption algorithms include MD5, SHA-256, SHA-512 and DES.


config EGLIBC_OPTION_EGLIBC_CRYPT_UFC
	bool "Ultra fast `crypt' implementation"
	default y
	select EGLIBC_OPTION_EGLIBC_CRYPT
	help
	  This option group provides ultra fast DES-based implementation of
	  the `crypt' function.  When this option group is disabled,
	  (a) the library will not provide the setkey[_r] and encrypt[_r]
	  functions and (b) the crypt[_r] function will return NULL and set the
	  errno to ENOSYS if /salt/ passed does not correspond to either MD5,
	  SHA-256 or SHA-512 algorithm.


config EGLIBC_OPTION_EGLIBC_DB_ALIASES
	bool "Functions for accessing the mail aliases database"
	default y
	help
	  This option group includes functions for looking up mail
	  aliases in '/etc/aliases' or using nsswitch.  It includes the
	  following functions:

		endaliasent
		getaliasbyname
		getaliasbyname_r
		getaliasent
		getaliasent_r
		setaliasent

	  When this option group is disabled, the NSS service libraries
	  also lack support for querying their mail alias tables.


config EGLIBC_OPTION_EGLIBC_ENVZ
	bool "Functions for handling envz-style environment vectors."
	default y
	help
	  This option group contains functions for creating and operating
	  on envz vectors.  An "envz vector" is a vector of strings in a
	  contiguous block of memory, where each element is a name-value
	  pair, and elements are separated from their neighbors by null
	  characters.

	  This option group includes the following functions:

		envz_add        envz_merge 
		envz_entry      envz_remove
		envz_get        envz_strip 


config EGLIBC_OPTION_EGLIBC_FCVT
	bool "Functions for converting floating-point numbers to strings"
	default y
	help
	  This option group includes functions for converting
	  floating-point numbers to strings.

	  This option group includes the following functions:

		ecvt           qecvt
		ecvt_r         qecvt_r
		fcvt           qfcvt
		fcvt_r         qfcvt_r
		gcvt           qgcvt


config EGLIBC_OPTION_EGLIBC_FMTMSG
	bool "Functions for formatting messages"
	default y
	help
	  This option group includes the following functions:

		addseverity    fmtmsg


config EGLIBC_OPTION_EGLIBC_FSTAB
	bool "Access functions for 'fstab'"
	default y
	help
	  This option group includes functions for reading the mount
	  point specification table, '/etc/fstab'.  These functions are
	  not included in the POSIX standard, which provides the
	  'getmntent' family of functions instead.

	  This option group includes the following functions:

		endfsent       getfsspec
		getfsent       setfsent
		getfsfile


config EGLIBC_OPTION_EGLIBC_FTRAVERSE
	bool "Functions for traversing file hierarchies"
	default y
	help
	  This option group includes functions for traversing file
	  UNIX file hierachies.

	  This option group includes the following functions:

		fts_open       ftw
		fts_read       nftw
		fts_children   ftw64
		fts_set        nftw64
		fts_close


config EGLIBC_OPTION_EGLIBC_GETLOGIN
	bool "The getlogin function"
	default y
	select EGLIBC_OPTION_EGLIBC_UTMP
	help
	  This function group includes the 'getlogin' and 'getlogin_r'
	  functions, which return the user name associated by the login
	  activity with the current process's controlling terminal.

	  With this option group disabled, the 'glob' function will not
	  fall back on 'getlogin' to find the user's login name for tilde
	  expansion when the 'HOME' environment variable is not set.


config EGLIBC_OPTION_EGLIBC_IDN
	bool "International domain names support"
	default y
	help
	  This option group includes the `libcidn' library which
	  provides support for international domain names.


config EGLIBC_OPTION_EGLIBC_INET
	bool "Networking support"
	default y
	help
	  This option group includes networking-specific functions and
	  data.  With EGLIBC_OPTION_EGLIBC_INET disabled, the EGLIBC
	  installation and API changes as follows:

	  - The following libraries are not installed:

		libanl
		libnsl
		libnss_compat
		libnss_dns
		libnss_hesiod
		libnss_nis
		libnss_nisplus
		libresolv
		 
	  - The following functions and variables are omitted from libc:

		authdes_create           hstrerror              svc_fdset
		authdes_getucred         htonl                  svc_getreq
		authdes_pk_create        htons                  svc_getreq_common
		authnone_create          if_freenameindex       svc_getreq_poll
		authunix_create          if_indextoname         svc_getreqset
		authunix_create_default  if_nameindex           svc_max_pollfd
		bindresvport             if_nametoindex         svc_pollfd
		callrpc                  in6addr_any            svcraw_create
		cbc_crypt                in6addr_loopback       svc_register
		clnt_broadcast           inet6_opt_append       svc_run
		clnt_create              inet6_opt_find         svc_sendreply
		clnt_pcreateerror        inet6_opt_finish       svctcp_create
		clnt_perrno              inet6_opt_get_val      svcudp_bufcreate
		clnt_perror              inet6_opt_init         svcudp_create
		clntraw_create           inet6_option_alloc     svcudp_enablecache
		clnt_spcreateerror       inet6_option_append    svcunix_create
		clnt_sperrno             inet6_option_find      svcunixfd_create
		clnt_sperror             inet6_option_init      svc_unregister
		clnttcp_create           inet6_option_next      user2netname
		clntudp_bufcreate        inet6_option_space     xdecrypt
		clntudp_create           inet6_opt_next         xdr_accepted_reply
		clntunix_create          inet6_opt_set_val      xdr_array
		des_setparity            inet6_rth_add          xdr_authdes_cred
		ecb_crypt                inet6_rth_getaddr      xdr_authdes_verf
		endaliasent              inet6_rth_init         xdr_authunix_parms
		endhostent               inet6_rth_reverse      xdr_bool
		endnetent                inet6_rth_segments     xdr_bytes
		endnetgrent              inet6_rth_space        xdr_callhdr
		endprotoent              inet_addr              xdr_callmsg
		endrpcent                inet_aton              xdr_char
		endservent               inet_lnaof             xdr_cryptkeyarg
		ether_aton               inet_makeaddr          xdr_cryptkeyarg2
		ether_aton_r             inet_netof             xdr_cryptkeyres
		ether_hostton            inet_network           xdr_des_block
		ether_line               inet_nsap_addr         xdr_double
		ether_ntoa               inet_nsap_ntoa         xdr_enum
		ether_ntoa_r             inet_ntoa              xdr_float
		ether_ntohost            inet_ntop              xdr_free
		freeaddrinfo             inet_pton              xdr_getcredres
		freeifaddrs              innetgr                xdr_hyper
		gai_strerror             iruserok               xdr_int
		getaddrinfo              iruserok_af            xdr_int16_t
		getaliasbyname           key_decryptsession     xdr_int32_t
		getaliasbyname_r         key_decryptsession_pk  xdr_int64_t
		getaliasent              key_encryptsession     xdr_int8_t
		getaliasent_r            key_encryptsession_pk  xdr_keybuf
		gethostbyaddr            key_gendes             xdr_key_netstarg
		gethostbyaddr_r          key_get_conv           xdr_key_netstres
		gethostbyname            key_secretkey_is_set   xdr_keystatus
		gethostbyname2           key_setnet             xdr_long
		gethostbyname2_r         key_setsecret          xdr_longlong_t
		gethostbyname_r          netname2host           xdrmem_create
		gethostent               netname2user           xdr_netnamestr
		gethostent_r             ntohl                  xdr_netobj
		getifaddrs               ntohs                  xdr_opaque
		getipv4sourcefilter      passwd2des             xdr_opaque_auth
		get_myaddress            pmap_getmaps           xdr_pmap
		getnameinfo              pmap_getport           xdr_pmaplist
		getnetbyaddr             pmap_rmtcall           xdr_pointer
		getnetbyaddr_r           pmap_set               xdr_quad_t
		getnetbyname             pmap_unset             xdrrec_create
		getnetbyname_r           rcmd                   xdrrec_endofrecord
		getnetent                rcmd_af                xdrrec_eof
		getnetent_r              registerrpc            xdrrec_skiprecord
		getnetgrent              res_init               xdr_reference
		getnetgrent_r            rexec                  xdr_rejected_reply
		getnetname               rexec_af               xdr_replymsg
		getprotobyname           rexecoptions           xdr_rmtcall_args
		getprotobyname_r         rpc_createerr          xdr_rmtcallres
		getprotobynumber         rresvport              xdr_short
		getprotobynumber_r       rresvport_af           xdr_sizeof
		getprotoent              rtime                  xdrstdio_create
		getprotoent_r            ruserok                xdr_string
		getpublickey             ruserok_af             xdr_u_char
		getrpcbyname             ruserpass              xdr_u_hyper
		getrpcbyname_r           setaliasent            xdr_u_int
		getrpcbynumber           sethostent             xdr_uint16_t
		getrpcbynumber_r         setipv4sourcefilter    xdr_uint32_t
		getrpcent                setnetent              xdr_uint64_t
		getrpcent_r              setnetgrent            xdr_uint8_t
		getrpcport               setprotoent            xdr_u_long
		getsecretkey             setrpcent              xdr_u_longlong_t
		getservbyname            setservent             xdr_union
		getservbyname_r          setsourcefilter        xdr_unixcred
		getservbyport            svcauthdes_stats       xdr_u_quad_t
		getservbyport_r          svcerr_auth            xdr_u_short
		getservent               svcerr_decode          xdr_vector
		getservent_r             svcerr_noproc          xdr_void
		getsourcefilter          svcerr_noprog          xdr_wrapstring
		h_errlist                svcerr_progvers        xencrypt
		h_errno                  svcerr_systemerr       xprt_register
		herror                   svcerr_weakauth        xprt_unregister
		h_nerr                   svc_exit
		host2netname             svcfd_create

	  - The rpcgen, nscd, and rpcinfo commands are not installed.

	  - The 'rpc' file (a text file listing RPC services) is not installed.

	  Socket-related system calls do not fall in this option group,
	  because many are also used for other inter-process
	  communication mechanisms.  For example, the 'syslog' routines
	  use Unix-domain sockets to communicate with the syslog daemon;
	  syslog is valuable in non-networked contexts.


config EGLIBC_OPTION_EGLIBC_INET_ANL
	bool "Asynchronous name lookup"
	default y
	select EGLIBC_OPTION_EGLIBC_INET
	help
	  This option group includes the `libanl' library which
	  provides support for asynchronous name lookup.


config EGLIBC_OPTION_EGLIBC_LIBM
	bool "libm (math library)"
	default y
	help
	  This option group includes the 'libm' library, containing
	  mathematical functions.  If this option group is omitted, then
	  an EGLIBC installation does not include shared or unshared versions
	  of the math library.

	  Note that this does not remove all floating-point related
	  functionality from EGLIBC; for example, 'printf' and 'scanf'
	  can still print and read floating-point values with this option
	  group disabled.

	  Note that the ISO Standard C++ library 'libstdc++' depends on
	  EGLIBC's math library 'libm'.  If you disable this option
	  group, you will not be able to build 'libstdc++' against the
	  resulting EGLIBC installation.


config EGLIBC_OPTION_EGLIBC_LIBM_BIG
	bool "Math library size"
	default y
	help
	  This option group enables default configuration of the math library.
	  Not selecting this option group removes most of the extended and
	  double precision math functions and replaces them with wrappers
	  to the single precision couterparts.
	  Doing so greatly degrades quality of calculations carried
	  out by the functions of the math library, but also significantly
	  reduces the size of the libm.
	  This option group is useful for systems that do not rely on precise
	  floating point math.


config EGLIBC_OPTION_EGLIBC_LOCALES
	bool "Locale definitions"
	default y
	help
	  This option group includes all locale definitions other than
	  that for the "C" locale.  If this option group is omitted, then
	  only the "C" locale is supported.


config EGLIBC_OPTION_EGLIBC_LOCALE_CODE
	bool "Locale functions"
	default y
	select EGLIBC_OPTION_POSIX_C_LANG_WIDE_CHAR
	help
	  This option group includes locale support functions, programs,
	  and libraries.  With EGLIBC_OPTION_EGLIBC_LOCALE_CODE disabled,
	  EGLIBC supports only the 'C' locale (also known as 'POSIX'),
	  and ignores the settings of the 'LANG' and 'LC_*' environment
	  variables.

	  With EGLIBC_OPTION_EGLIBC_LOCALE_CODE disabled, the following
	  functions are omitted from libc:

		duplocale   localeconv  nl_langinfo    rpmatch  strfmon_l
		freelocale  newlocale   nl_langinfo_l  strfmon  uselocale

	  Furthermore, only the LC_CTYPE and LC_TIME categories of the
	  standard "C" locale are available.

	  The EGLIBC_OPTION_EGLIBC_CATGETS option group depends on this option
	  group; if you disable EGLIBC_OPTION_EGLIBC_LOCALE_CODE, you must also
	  disable EGLIBC_OPTION_EGLIBC_CATGETS.


config EGLIBC_OPTION_EGLIBC_MEMUSAGE
	bool "Memory profiling library"
	default y
	help
	  This option group includes the `libmemusage' library and
	  the `memusage' and `memusagestat' utilities.
	  These components provide memory profiling functions.

	  EGLIBC_OPTION_EGLIBC_MEMUSAGE_DEFAULT_BUFFER_SIZE

	  Libmemusage library buffers the profiling data in memory
	  before writing it out to disk.  By default, the library
	  allocates 1.5M buffer, which can be substantial for some
	  systems.  EGLIBC_OPTION_EGLIBC_MEMUSAGE_DEFAULT_BUFFER_SIZE option
	  allows to change the default buffer size.  It specifies
	  the number of entries the buffer should have.
	  On most architectures one buffer entry amounts to 48 bytes,
	  so setting this option to the value of 512 will reduce the size of
	  the memory buffer to 24K.


config EGLIBC_OPTION_EGLIBC_NIS
	bool "Support for NIS, NIS+, and the special 'compat' services."
	default y
	select EGLIBC_OPTION_EGLIBC_INET
	select EGLIBC_OPTION_EGLIBC_SUNRPC
	help
	  This option group includes the NIS, NIS+, and 'compat' Name
	  Service Switch service libraries.  When it is disabled, those
	  services libraries are not installed; you should remove any
	  references to them from your 'nsswitch.conf' file.

	  This option group depends on the EGLIBC_OPTION_EGLIBC_INET option
	  group; you must enable that to enable this option group.


config EGLIBC_OPTION_EGLIBC_NSSWITCH
	bool "Name service switch (nsswitch) support"
	default y
	select EGLIBC_OPTION_EGLIBC_INET
	help

	  This option group includes support for the 'nsswitch' facility.
	  With this option group enabled, all EGLIBC functions for
	  accessing various system databases (passwords and groups;
	  networking; aliases; public keys; and so on) consult the
	  '/etc/nsswitch.conf' configuration file to decide how to handle
	  queries.

	  With this option group disabled, EGLIBC uses a fixed list of
	  services to satisfy queries on each database, as requested by
	  configuration files specified when EGLIBC is built.  Your
	  'option-groups.config' file must set the following two
	  variables:

	  EGLIBC_OPTION_EGLIBC_NSSWITCH_FIXED_CONFIG

		Set this to the name of a file whose contents observe the
		same syntax as an ordinary '/etc/nsswitch.conf' file.  The
		EGLIBC build process parses this file just as EGLIBC would
		at run time if EGLIBC_NSSWITCH were enabled, and
		produces a C library that uses the nsswitch service
		libraries to search for database entries as this file
		specifies, instead of consulting '/etc/nsswitch.conf' at run
		time.

		This should be an absolute filename.  The EGLIBC build
		process may use it from several different working
		directories.  It may include references to Makefile
		variables like 'common-objpfx' (the top of the build tree,
		with a trailing slash), or '..' (the top of the source tree,
		with a trailing slash).

		The EGLIBC source tree includes a sample configuration file
		named 'nss/fixed-nsswitch.conf'; for simple configurations,
		you will probably want to delete references to databases not
		needed on your system.

	  EGLIBC_OPTION_EGLIBC_NSSWITCH_FIXED_FUNCTIONS

		The EGLIBC build process uses this file to decide which
		functions to make available from which service libraries.
		The file 'nss/fixed-nsswitch.functions' serves as a sample
		configuration file for this setting, and explains its syntax
		and meaning in more detail.

		This should be an absolute file name.  The EGLIBC build
		process may use it from several different working
		directories.  It may include references to Makefile
		variables like 'common-objpfx' (the top of the build tree,
		with a trailing slash), or '..' (the top of the source tree,
		with a trailing slash).

		Be sure to mention each function in each service you wish to
		use.  If you do not mention a service's function here, the
		EGLIBC database access functions will not find it, even if
		it is listed in the EGLIBC_OPTION_EGLIBC_NSSWITCH_FIXED_CONFIG
		file.

	  In this arrangement, EGLIBC will not use the 'dlopen' and
	  'dlsym' functions to find database access functions.  Instead,
	  libc hard-codes references to the service libraries' database
	  access functions.  You must explicitly link your program
	  against the name service libraries (those whose names start
	  with 'libnss_', in the sysroot's '/lib' directory) whose
	  functions you intend to use.  This arrangement helps
	  system-wide static analysis tools decide which functions a
	  system actually uses.

	  Note that some nsswitch service libraries require other option
	  groups to be enabled; for example, the EGLIBC_OPTION_EGLIBC_INET
	  option group must be enabled to use the 'libnss_dns.so.2'
	  service library, which uses the Domain Name System network
	  protocol to answer queries.


config EGLIBC_OPTION_EGLIBC_RCMD
	bool "Support for 'rcmd' and related library functions"
	default y
	select EGLIBC_OPTION_EGLIBC_INET
	help
	  This option group includes functions for running commands on
	  remote machines via the 'rsh' protocol, and doing authentication
	  related to those functions.  This also includes functions that
	  use the 'rexec' protocol.

	  This option group includes the following functions:

		rcmd            ruserok
		rcmd_af         ruserok_af
		rexec           iruserok
		rexec_af        iruserok_af
		rresvport       ruserpass
		rresvport_af


config EGLIBC_OPTION_EGLIBC_RTLD_DEBUG
	bool "Runtime linker debug print outs"
	default y
	help
	  This option group enables debug output of the runtime linker
	  which is activated via LD_DEBUG and LD_TRACE_PRELINKING
	  environment variables.  Disabling this option group yields
	  a smaller runtime linker binary.
	  BEWARE: Disabling this option group is likely to break
	  the `ldd' utility which may also be used by the prelinker.
	  In particular, the `--unused' ldd option will not work correctly.


config EGLIBC_OPTION_EGLIBC_SPAWN
	bool "Support for POSIX posix_spawn functions"
	default y
	help
	  This option group includes the POSIX functions for executing
	  programs in child processes without using 'fork' or 'vfork'.

	  This option group includes the following functions:

		posix_spawn
		posix_spawnattr_destroy
		posix_spawnattr_getflags
		posix_spawnattr_getpgroup
		posix_spawnattr_getschedparam
		posix_spawnattr_getschedpolicy
		posix_spawnattr_getsigdefault
		posix_spawnattr_getsigmask
		posix_spawnattr_init
		posix_spawnattr_setflags
		posix_spawnattr_setpgroup
		posix_spawnattr_setschedparam
		posix_spawnattr_setschedpolicy
		posix_spawnattr_setsigdefault
		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_spawnp

	  This option group also provides the ability for the iconv,
	  localedef, and locale programs to operate transparently on
	  compressed charset definitions.  When this option group is
	  disabled, those programs will only operate on uncompressed
	  charmap files.


config EGLIBC_OPTION_EGLIBC_STREAMS
	bool "Support for accessing STREAMS."
	default y
	help
	  This option group includes functions for reading and writing
	  messages to and from STREAMS.  The STREAMS interface provides a
	  uniform mechanism for implementing networking services and other
	  character-based I/O.  (STREAMS are not to be confused with
	  <stdio.h> FILE objects, also called 'streams'.)

	  This option group includes the following functions:

		getmsg          putpmsg
		getpmsg         fattach
		isastream       fdetach
		putmsg


config EGLIBC_OPTION_EGLIBC_SUNRPC
	bool "Support for the Sun 'RPC' protocol."
	default y
	select EGLIBC_OPTION_EGLIBC_INET
	help
	  This option group includes support for the Sun RPC protocols,
	  including the 'rpcgen' and 'rpcinfo' programs.


config EGLIBC_OPTION_EGLIBC_UTMP
	bool "Older access functions for 'utmp' login records"
	default y
	help
	  This option group includes the older 'utent' family of
	  functions for accessing user login records in the 'utmp' file.
	  POSIX omits these functions in favor of the 'utxent' family,
	  and they are obsolete on systems other than Linux.

	  This option group includes the following functions:

		endutent
		getutent
		getutent_r
		getutid
		getutid_r
		getutline
		getutline_r
		logwtmp
		pututline
		setutent
		updwtmp
		utmpname

	  This option group includes the following libraries:

		libutil.so (and libutil.a)


config EGLIBC_OPTION_EGLIBC_UTMPX
	bool "POSIX access functions for 'utmp' login records"
	default y
	select EGLIBC_OPTION_EGLIBC_UTMP    
	help
	  This option group includes the POSIX functions for reading and
	  writing user login records in the 'utmp' file (usually
	  '/var/run/utmp').  The POSIX functions operate on 'struct
	  utmpx' structures, as opposed to the family of older 'utent'
	  functions, which operate on 'struct utmp' structures.

	  This option group includes the following functions:

		endutxent
		getutmp
		getutmpx
		getutxent
		getutxid
		getutxline
		pututxline
		setutxent
		updwtmpx
		utmpxname


config EGLIBC_OPTION_EGLIBC_WORDEXP
	bool "Shell-style word expansion"
	default y
	help
	  This option group includes the 'wordexp' function for
	  performing word expansion in the manner of the shell, and the
	  accompanying 'wordfree' function.


config EGLIBC_OPTION_POSIX_C_LANG_WIDE_CHAR
	bool "ISO C library wide character functions, excluding I/O"
	default y
	help
	  This option group includes the functions defined by the ISO C
	  standard for working with wide and multibyte characters in
	  memory.  Functions for reading and writing wide and multibyte
	  characters from and to files call in the
	  EGLIBC_OPTION_POSIX_WIDE_CHAR_DEVICE_IO option group.

	  This option group includes the following functions:

		btowc         mbsinit       wcscspn       wcstoll
		iswalnum      mbsrtowcs     wcsftime      wcstombs
		iswalpha      mbstowcs      wcslen        wcstoul
		iswblank      mbtowc        wcsncat       wcstoull
		iswcntrl      swprintf      wcsncmp       wcstoumax
		iswctype      swscanf       wcsncpy       wcsxfrm
		iswdigit      towctrans     wcspbrk       wctob
		iswgraph      towlower      wcsrchr       wctomb
		iswlower      towupper      wcsrtombs     wctrans
		iswprint      vswprintf     wcsspn        wctype
		iswpunct      vswscanf      wcsstr        wmemchr
		iswspace      wcrtomb       wcstod        wmemcmp
		iswupper      wcscat        wcstof        wmemcpy
		iswxdigit     wcschr        wcstoimax     wmemmove
		mblen         wcscmp        wcstok        wmemset
		mbrlen        wcscoll       wcstol
		mbrtowc       wcscpy        wcstold


config EGLIBC_OPTION_POSIX_REGEXP
	bool "Regular expressions"
	default y
	help
	  This option group includes the POSIX regular expression
	  functions, and the associated non-POSIX extensions and
	  compatibility functions.

	  With EGLIBC_OPTION_POSIX_REGEXP disabled, the following functions are
	  omitted from libc:

		re_comp                 re_max_failures         regcomp
		re_compile_fastmap      re_search               regerror
		re_compile_pattern      re_search_2             regexec
		re_exec                 re_set_registers        regfree
		re_match                re_set_syntax           rpmatch
		re_match_2              re_syntax_options

	  Furthermore, the compatibility regexp interface defined in the
	  <regexp.h> header file, 'compile', 'step', and 'advance', is
	  omitted.


config EGLIBC_OPTION_POSIX_REGEXP_GLIBC
	bool "Regular expressions from GLIBC"
	default y
	select EGLIBC_OPTION_POSIX_REGEXP
	help
	  This option group specifies which regular expression
	  library to use.  The choice is between regex
	  implementation from GLIBC and regex implementation from
	  libiberty.  The GLIBC variant is fully POSIX conformant and
	  optimized for speed; regex from libiberty is more than twice
	  as small while still is enough for most practical purposes.


config EGLIBC_OPTION_POSIX_WIDE_CHAR_DEVICE_IO
	bool "Input and output functions for wide characters"
	default y
	select EGLIBC_OPTION_POSIX_C_LANG_WIDE_CHAR
	help
	  This option group includes functions for reading and writing
	  wide characters to and from <stdio.h> streams.

	  This option group includes the following functions:

		fgetwc        fwprintf      putwchar      vwscanf
		fgetws        fwscanf       ungetwc       wprintf
		fputwc        getwc         vfwprintf     wscanf
		fputws        getwchar      vfwscanf
		fwide         putwc         vwprintf

	  This option group further includes the following unlocked
	  variants of the above functions:

		fgetwc_unlocked           getwc_unlocked
		fgetws_unlocked           getwchar_unlocked
		fputwc_unlocked           putwc_unlocked
		fputws_unlocked           putwchar_unlocked
					
	  Note that the GNU standard C++ library, 'libstdc++.so', uses
	  some of these functions; you will not be able to link or run
	  C++ programs if you disable this option group.

	  This option group also affects the behavior of the following
	  functions:

		fdopen
		fopen
		fopen64
		freopen
		freopen64

	  These functions all take an OPENTYPE parameter which may
	  contain a string of the form ",ccs=CHARSET", indicating that
	  the underlying file uses the character set named CHARSET.
	  This produces a wide-oriented stream, which is only useful
	  when the functions included in this option group are present.
	  If the user attempts to open a file specifying a character set
	  in the OPENTYPE parameter, and EGLIBC was built with this
	  option group disabled, the function returns NULL, and sets
	  errno to EINVAL.