1 # This file documents the option groups EGLIBC currently supports, in
2 # a format akin to the Linux Kconfig system's. The syntax may change
5 # An entry of the form:
7 # config OPTION_GROUP_NAME
8 # bool "one-line explanation of what this option group controls"
10 # Multi-line help explaining the option group's meaning in
11 # some detail, terminated by indentation level.
13 # defines an option group whose variable is OPTION_GROUP_NAME, with
14 # meaningful values 'y' (enabled) and 'n' (disabled). The
15 # documentation is formatted to be consumed by some sort of
16 # interactive configuration interface, but EGLIBC doesn't have such an
19 # An option may have a 'depends' line, indicating which other options
20 # must also be enabled if this option is. At present, EGLIBC doesn't
21 # check that these dependencies are satisfied.
23 # Option group variables get their default values from the file
24 # 'option-groups.defaults', in the top directory of the EGLIBC source
25 # tree. By default, all EGLIBC option groups are enabled --- their
26 # variables are set to 'y'.
28 # After including 'option-groups.defaults', the EGLIBC make machinery
29 # includes the file 'option-groups.config' from the top of the build
30 # tree, if it is present. Developers can place assignments to option
31 # group variables in that file to override the defaults. For example,
32 # to disable an option group, place a line of the form:
34 # OPTION_GROUP_NAME = n
36 # in 'option-groups.config' at the top of your build tree. To
37 # explicitly enable an option group, you may also write:
39 # OPTION_GROUP_NAME = y
41 # although this simply reestablishes the value already set by
42 # 'option-groups.defaults'.
44 config OPTION_EGLIBC_ADVANCED_INET6
45 bool "IPv6 Advanced Sockets API support (RFC3542)"
46 depends OPTION_EGLIBC_INET
48 This option group includes the functions specified by RFC 3542,
49 "Advanced Sockets Application Program Interface (API) for
52 This option group includes the following functions:
74 config OPTION_EGLIBC_BACKTRACE
75 bool "Functions for producing backtraces"
77 This option group includes functions for producing a list of
78 the function calls that are currently active in a thread, from
79 within the thread itself. These functions are often used
80 within signal handlers, to produce diagnostic output.
82 This option group includes the following functions:
88 config OPTION_EGLIBC_BIG_MACROS
89 bool "Use extensive inline code"
91 This option group specifies whether certain pieces of code
92 should be inlined to achieve maximum speed. If this option
93 group is not selected, function calls will be used instead,
94 hence reducing the library footprint.
96 config OPTION_EGLIBC_BSD
97 bool "BSD-specific functions, and their compatibility stubs"
99 This option group includes functions specific to BSD kernels.
100 A number of these functions have stub versions that are also
101 included in libraries built for non-BSD systems for
104 This option group includes the following functions:
112 config OPTION_EGLIBC_CXX_TESTS
113 bool "Tests that link against the standard C++ library."
114 depends OPTION_POSIX_WIDE_CHAR_DEVICE_IO
115 depends OPTION_EGLIBC_LIBM
117 This option group does not include any C library functions;
118 instead, it controls which EGLIBC tests an ordinary 'make
119 tests' runs. With this group disabled, tests that would
120 normally link against the standard C++ library are not
123 The standard C++ library depends on the math library 'libm' and
124 the wide character I/O functions included in EGLIBC. If those
125 option groups are disabled, this test must also be disabled.
127 config OPTION_EGLIBC_CATGETS
128 bool "Functions for accessing message catalogs"
129 depends OPTION_EGLIBC_LOCALE_CODE
131 This option group includes functions for accessing message
132 catalogs: catopen, catclose, and catgets.
134 This option group depends on the OPTION_EGLIBC_LOCALE_CODE
135 option group; if you disable that, you must also disable this.
137 config OPTION_EGLIBC_CHARSETS
138 bool "iconv/gconv character set conversion libraries"
141 This option group includes support for character sets other
142 than ASCII (ANSI_X3.4-1968) and Unicode and ISO-10646 in their
143 various encodings. This affects both the character sets
144 supported by the wide and multibyte character functions, and
145 those supported by the 'iconv' functions.
147 With this option group disabled, EGLIBC supports only the
148 following character sets:
164 10646-1:1993 - ISO 10646, in big-endian UCS4 form
176 UCS-4LE - ISO 10646, in little-endian UCS4 form
178 ISO-10646/UTF-8 - ISO 10646, in UTF-8 form
185 ISO-10646/UCS2 - ISO 10646, in target-endian UCS2 form
192 UCS-2BE - ISO 10646, in big-endian UCS2 form
195 UCS-2LE - ISO 10646, in little-endian UCS2 form
198 WCHAR_T - EGLIBC's internal form (target-endian,
201 config OPTION_EGLIBC_DB_ALIASES
202 bool "Functions for accessing the mail aliases database"
204 This option group includues functions for looking up mail
205 aliases in '/etc/aliases' or using nsswitch. It includes the
215 When this option group is disabled, the NSS service libraries
216 also lack support for querying their mail alias tables.
218 config OPTION_EGLIBC_ENVZ
219 bool "Functions for handling envz-style environment vectors."
221 This option group contains functions for creating and operating
222 on envz vectors. An "envz vector" is a vector of strings in a
223 contiguous block of memory, where each element is a name-value
224 pair, and elements are separated from their neighbors by null
227 This option group includes the following functions:
230 envz_entry envz_remove
233 config OPTION_EGLIBC_FCVT
234 bool "Functions for converting floating-point numbers to strings"
236 This option group includes functions for converting
237 floating-point numbers to strings.
239 This option group includes the following functions:
247 config OPTION_EGLIBC_FMTMSG
248 bool "Functions for formatting messages"
250 This option group includes the following functions:
254 config OPTION_EGLIBC_FSTAB
255 bool "Access functions for 'fstab'"
257 This option group includes functions for reading the mount
258 point specification table, '/etc/fstab'. These functions are
259 not included in the POSIX standard, which provides the
260 'getmntent' family of functions instead.
262 This option group includes the following functions:
268 config OPTION_EGLIBC_FTRAVERSE
269 bool "Functions for traversing file hierarchies"
271 This option group includes functions for traversing file
272 UNIX file hierachies.
274 This option group includes the following functions:
282 config OPTION_EGLIBC_GETLOGIN
283 bool "The getlogin function"
284 depends OPTION_EGLIBC_UTMP
286 This function group includes the 'getlogin' and 'getlogin_r'
287 functions, which return the user name associated by the login
288 activity with the current process's controlling terminal.
290 With this option group disabled, the 'glob' function will not
291 fall back on 'getlogin' to find the user's login name for tilde
292 expansion when the 'HOME' environment variable is not set.
294 config OPTION_EGLIBC_INET
295 bool "Networking support"
297 This option group includes networking-specific functions and
298 data. With OPTION_EGLIBC_INET disabled, the EGLIBC
299 installation and API changes as follows:
301 - The following libraries are not installed:
312 - The following functions and variables are omitted from libc:
314 authdes_create hstrerror svc_fdset
315 authdes_getucred htonl svc_getreq
316 authdes_pk_create htons svc_getreq_common
317 authnone_create if_freenameindex svc_getreq_poll
318 authunix_create if_indextoname svc_getreqset
319 authunix_create_default if_nameindex svc_max_pollfd
320 bindresvport if_nametoindex svc_pollfd
321 callrpc in6addr_any svcraw_create
322 cbc_crypt in6addr_loopback svc_register
323 clnt_broadcast inet6_opt_append svc_run
324 clnt_create inet6_opt_find svc_sendreply
325 clnt_pcreateerror inet6_opt_finish svctcp_create
326 clnt_perrno inet6_opt_get_val svcudp_bufcreate
327 clnt_perror inet6_opt_init svcudp_create
328 clntraw_create inet6_option_alloc svcudp_enablecache
329 clnt_spcreateerror inet6_option_append svcunix_create
330 clnt_sperrno inet6_option_find svcunixfd_create
331 clnt_sperror inet6_option_init svc_unregister
332 clnttcp_create inet6_option_next user2netname
333 clntudp_bufcreate inet6_option_space xdecrypt
334 clntudp_create inet6_opt_next xdr_accepted_reply
335 clntunix_create inet6_opt_set_val xdr_array
336 des_setparity inet6_rth_add xdr_authdes_cred
337 ecb_crypt inet6_rth_getaddr xdr_authdes_verf
338 endaliasent inet6_rth_init xdr_authunix_parms
339 endhostent inet6_rth_reverse xdr_bool
340 endnetent inet6_rth_segments xdr_bytes
341 endnetgrent inet6_rth_space xdr_callhdr
342 endprotoent inet_addr xdr_callmsg
343 endrpcent inet_aton xdr_char
344 endservent inet_lnaof xdr_cryptkeyarg
345 ether_aton inet_makeaddr xdr_cryptkeyarg2
346 ether_aton_r inet_netof xdr_cryptkeyres
347 ether_hostton inet_network xdr_des_block
348 ether_line inet_nsap_addr xdr_double
349 ether_ntoa inet_nsap_ntoa xdr_enum
350 ether_ntoa_r inet_ntoa xdr_float
351 ether_ntohost inet_ntop xdr_free
352 freeaddrinfo inet_pton xdr_getcredres
353 freeifaddrs innetgr xdr_hyper
354 gai_strerror iruserok xdr_int
355 getaddrinfo iruserok_af xdr_int16_t
356 getaliasbyname key_decryptsession xdr_int32_t
357 getaliasbyname_r key_decryptsession_pk xdr_int64_t
358 getaliasent key_encryptsession xdr_int8_t
359 getaliasent_r key_encryptsession_pk xdr_keybuf
360 gethostbyaddr key_gendes xdr_key_netstarg
361 gethostbyaddr_r key_get_conv xdr_key_netstres
362 gethostbyname key_secretkey_is_set xdr_keystatus
363 gethostbyname2 key_setnet xdr_long
364 gethostbyname2_r key_setsecret xdr_longlong_t
365 gethostbyname_r netname2host xdrmem_create
366 gethostent netname2user xdr_netnamestr
367 gethostent_r ntohl xdr_netobj
368 getifaddrs ntohs xdr_opaque
369 getipv4sourcefilter passwd2des xdr_opaque_auth
370 get_myaddress pmap_getmaps xdr_pmap
371 getnameinfo pmap_getport xdr_pmaplist
372 getnetbyaddr pmap_rmtcall xdr_pointer
373 getnetbyaddr_r pmap_set xdr_quad_t
374 getnetbyname pmap_unset xdrrec_create
375 getnetbyname_r rcmd xdrrec_endofrecord
376 getnetent rcmd_af xdrrec_eof
377 getnetent_r registerrpc xdrrec_skiprecord
378 getnetgrent res_init xdr_reference
379 getnetgrent_r rexec xdr_rejected_reply
380 getnetname rexec_af xdr_replymsg
381 getprotobyname rexecoptions xdr_rmtcall_args
382 getprotobyname_r rpc_createerr xdr_rmtcallres
383 getprotobynumber rresvport xdr_short
384 getprotobynumber_r rresvport_af xdr_sizeof
385 getprotoent rtime xdrstdio_create
386 getprotoent_r ruserok xdr_string
387 getpublickey ruserok_af xdr_u_char
388 getrpcbyname ruserpass xdr_u_hyper
389 getrpcbyname_r setaliasent xdr_u_int
390 getrpcbynumber sethostent xdr_uint16_t
391 getrpcbynumber_r setipv4sourcefilter xdr_uint32_t
392 getrpcent setnetent xdr_uint64_t
393 getrpcent_r setnetgrent xdr_uint8_t
394 getrpcport setprotoent xdr_u_long
395 getsecretkey setrpcent xdr_u_longlong_t
396 getservbyname setservent xdr_union
397 getservbyname_r setsourcefilter xdr_unixcred
398 getservbyport svcauthdes_stats xdr_u_quad_t
399 getservbyport_r svcerr_auth xdr_u_short
400 getservent svcerr_decode xdr_vector
401 getservent_r svcerr_noproc xdr_void
402 getsourcefilter svcerr_noprog xdr_wrapstring
403 h_errlist svcerr_progvers xencrypt
404 h_errno svcerr_systemerr xprt_register
405 herror svcerr_weakauth xprt_unregister
407 host2netname svcfd_create
409 - The rpcgen, nscd, and rpcinfo commands are not installed.
411 - The 'rpc' file (a text file listing RPC services) is not installed.
413 Socket-related system calls do not fall in this option group,
414 because many are also used for other inter-process
415 communication mechanisms. For example, the 'syslog' routines
416 use Unix-domain sockets to communicate with the syslog daemon;
417 syslog is valuable in non-networked contexts.
419 config OPTION_EGLIBC_LIBM
420 bool "libm (math library)"
422 This option group includes the 'libm' library, containing
423 mathematical functions. If this option group is omitted, then
424 an EGLIBC installation does not include shared or unshared versions
427 Note that this does not remove all floating-point related
428 functionality from EGLIBC; for example, 'printf' and 'scanf'
429 can still print and read floating-point values with this option
432 Note that the ISO Standard C++ library 'libstdc++' depends on
433 EGLIBC's math library 'libm'. If you disable this option
434 group, you will not be able to build 'libstdc++' against the
435 resulting EGLIBC installation.
437 config OPTION_EGLIBC_LOCALES
438 bool "Locale definitions"
440 This option group includes all locale definitions other than
441 that for the "C" locale. If this option group is omitted, then
442 only the "C" locale is supported.
445 config OPTION_EGLIBC_LOCALE_CODE
446 bool "Locale functions"
447 depends OPTION_POSIX_C_LANG_WIDE_CHAR
449 This option group includes locale support functions, programs,
450 and libraries. With OPTION_EGLIBC_LOCALE_FUNCTIONS disabled,
451 EGLIBC supports only the 'C' locale (also known as 'POSIX'),
452 and ignores the settings of the 'LANG' and 'LC_*' environment
455 With OPTION_EGLIBC_LOCALE_CODE disabled, the following
456 functions are omitted from libc:
458 duplocale localeconv nl_langinfo rpmatch strfmon_l
459 freelocale newlocale nl_langinfo_l strfmon uselocale
461 Furthermore, only the LC_CTYPE and LC_TIME categories of the
462 standard "C" locale are available.
464 The OPTION_EGLIBC_CATGETS option group depends on this option
465 group; if you disable OPTION_EGLIBC_LOCALE_CODE, you must also
466 disable OPTION_EGLIBC_CATGETS.
468 config OPTION_EGLIBC_MEMUSAGE
469 bool "Memory profiling library"
471 This option group includes the `libmemusage' library and
472 the `memusage' and `memusagestat' utilities.
473 These components provide memory profiling functions.
475 OPTION_EGLIBC_MEMUSAGE_DEFAULT_BUFFER_SIZE
477 Libmemusage library buffers the profiling data in memory
478 before writing it out to disk. By default, the library
479 allocates 1.5M buffer, which can be substantial for some
480 systems. OPTION_EGLIBC_MEMUSAGE_DEFAULT_BUFFER_SIZE option
481 allows to change the default buffer size. It specifies
482 the number of entries the buffer should have.
483 On most architectures one buffer entry amounts to 48 bytes,
484 so setting this option to the value of 512 will reduce the size of
485 the memory buffer to 24K.
487 config OPTION_EGLIBC_NIS
488 bool "Support for NIS, NIS+, and the special 'compat' services."
489 depends OPTION_EGLIBC_INET
490 depends OPTION_EGLIBC_SUNRPC
492 This option group includes the NIS, NIS+, and 'compat' Name
493 Service Switch service libraries. When it is disabled, those
494 services libraries are not installed; you should remove any
495 references to them from your 'nsswitch.conf' file.
497 This option group depends on the OPTION_EGLIBC_INET option
498 group; you must enable that to enable this option group.
500 config OPTION_EGLIBC_NSSWITCH
501 bool "Name service switch (nsswitch) support"
504 This option group includes support for the 'nsswitch' facility.
505 With this option group enabled, all EGLIBC functions for
506 accessing various system databases (passwords and groups;
507 networking; aliases; public keys; and so on) consult the
508 '/etc/nsswitch.conf' configuration file to decide how to handle
511 With this option group disabled, EGLIBC uses a fixed list of
512 services to satisfy queries on each database, as requested by
513 configuration files specified when EGLIBC is built. Your
514 'option-groups.config' file must set the following two
517 OPTION_EGLIBC_NSSWITCH_FIXED_CONFIG
519 Set this to the name of a file whose contents observe the
520 same syntax as an ordinary '/etc/nsswitch.conf' file. The
521 EGLIBC build process parses this file just as EGLIBC would
522 at run time if OPTION_EGLIBC_NSSWITCH were enabled, and
523 produces a C library that uses the nsswitch service
524 libraries to search for database entries as this file
525 specifies, instead of consulting '/etc/nsswitch.conf' at run
528 This should be an absolute filename. The EGLIBC build
529 process may use it from several different working
530 directories. It may include references to Makefile
531 variables like 'common-objpfx' (the top of the build tree,
532 with a trailing slash), or '..' (the top of the source tree,
533 with a trailing slash).
535 The EGLIBC source tree includes a sample configuration file
536 named 'nss/fixed-nsswitch.conf'; for simple configurations,
537 you will probably want to delete references to databases not
538 needed on your system.
540 OPTION_EGLIBC_NSSWITCH_FIXED_FUNCTIONS
542 The EGLIBC build process uses this file to decide which
543 functions to make available from which service libraries.
544 The file 'nss/fixed-nsswitch.functions' serves as a sample
545 configuration file for this setting, and explains its syntax
546 and meaning in more detail.
548 This should be an absolute file name. The EGLIBC build
549 process may use it from several different working
550 directories. It may include references to Makefile
551 variables like 'common-objpfx' (the top of the build tree,
552 with a trailing slash), or '..' (the top of the source tree,
553 with a trailing slash).
555 Be sure to mention each function in each service you wish to
556 use. If you do not mention a service's function here, the
557 EGLIBC database access functions will not find it, even if
558 it is listed in the OPTION_EGLIBC_NSSWITCH_FIXED_CONFIG
561 In this arrangement, EGLIBC will not use the 'dlopen' and
562 'dlsym' functions to find database access functions. Instead,
563 libc hard-codes references to the service libraries' database
564 access functions. You must explicitly link your program
565 against the name service libraries (those whose names start
566 with 'libnss_', in the sysroot's '/lib' directory) whose
567 functions you intend to use. This arrangement helps
568 system-wide static analysis tools decide which functions a
569 system actually uses.
571 Note that some nsswitch service libraries require other option
572 groups to be enabled; for example, the OPTION_EGLIBC_INET
573 option group must be enabled to use the 'libnss_dns.so.2'
574 service library, which uses the Domain Name System network
575 protocol to answer queries.
577 config OPTION_EGLIBC_RCMD
578 bool "Support for 'rcmd' and related library functions"
579 depends OPTION_EGLIBC_INET
581 This option group includes functions for running commands on
582 remote machines via the 'rsh' protocol, and doing authentication
583 related to those functions. This also includes functions that
584 use the 'rexec' protocol.
586 This option group includes the following functions:
595 config OPTION_EGLIBC_SPAWN
596 bool "Support for POSIX posix_spawn functions"
598 This option group includes the POSIX functions for executing
599 programs in child processes without using 'fork' or 'vfork'.
601 This option group includes the following functions:
604 posix_spawnattr_destroy
605 posix_spawnattr_getflags
606 posix_spawnattr_getpgroup
607 posix_spawnattr_getschedparam
608 posix_spawnattr_getschedpolicy
609 posix_spawnattr_getsigdefault
610 posix_spawnattr_getsigmask
612 posix_spawnattr_setflags
613 posix_spawnattr_setpgroup
614 posix_spawnattr_setschedparam
615 posix_spawnattr_setschedpolicy
616 posix_spawnattr_setsigdefault
617 posix_spawnattr_setsigmask
618 posix_spawn_file_actions_addclose
619 posix_spawn_file_actions_adddup2
620 posix_spawn_file_actions_addopen
621 posix_spawn_file_actions_destroy
622 posix_spawn_file_actions_init
625 This option group also provides the ability for the iconv,
626 localedef, and locale programs to operate transparently on
627 compressed charset definitions. When this option group is
628 disabled, those programs will only operate on uncompressed
631 config OPTION_EGLIBC_STREAMS
632 bool "Support for accessing STREAMS."
634 This option group includes functions for reading and writing
635 messages to and from STREAMS. The STREAMS interface provides a
636 uniform mechanism for implementing networking services and other
637 character-based I/O. (STREAMS are not to be confused with
638 <stdio.h> FILE objects, also called 'streams'.)
640 This option group includes the following functions:
647 config OPTION_EGLIBC_SUNRPC
648 bool "Support for the Sun 'RPC' protocol."
649 depends OPTION_EGLIBC_INET
651 This option group includes support for the Sun RPC protocols,
652 including the 'rpcgen' and 'rpcinfo' programs.
654 config OPTION_EGLIBC_UTMP
655 bool "Older access functions for 'utmp' login records"
657 This option group includes the older 'utent' family of
658 functions for accessing user login records in the 'utmp' file.
659 POSIX omits these functions in favor of the 'utxent' family,
660 and they are obsolete on systems other than Linux.
662 This option group includes the following functions:
677 This option group includes the following libraries:
679 libutil.so (and libutil.a)
681 config OPTION_EGLIBC_UTMPX
682 bool "POSIX access functions for 'utmp' login records"
683 depends OPTION_EGLIBC_UTMP
685 This option group includes the POSIX functions for reading and
686 writing user login records in the 'utmp' file (usually
687 '/var/run/utmp'). The POSIX functions operate on 'struct
688 utmpx' structures, as opposed to the family of older 'utent'
689 functions, which operate on 'struct utmp' structures.
691 This option group includes the following functions:
704 config OPTION_EGLIBC_WORDEXP
705 bool "Shell-style word expansion"
707 This option group includes the 'wordexp' function for
708 performing word expansion in the manner of the shell, and the
709 accompanying 'wordfree' function.
711 config OPTION_POSIX_C_LANG_WIDE_CHAR
712 bool "ISO C library wide character functions, excluding I/O"
714 This option group includes the functions defined by the ISO C
715 standard for working with wide and multibyte characters in
716 memory. Functions for reading and writing wide and multibyte
717 characters from and to files call in the
718 OPTION_POSIX_WIDE_CHAR_DEVICE_IO option group.
720 This option group includes the following functions:
722 btowc mbsinit wcscspn wcstoll
723 iswalnum mbsrtowcs wcsftime wcstombs
724 iswalpha mbstowcs wcslen wcstoul
725 iswblank mbtowc wcsncat wcstoull
726 iswcntrl swprintf wcsncmp wcstoumax
727 iswctype swscanf wcsncpy wcsxfrm
728 iswdigit towctrans wcspbrk wctob
729 iswgraph towlower wcsrchr wctomb
730 iswlower towupper wcsrtombs wctrans
731 iswprint vswprintf wcsspn wctype
732 iswpunct vswscanf wcsstr wmemchr
733 iswspace wcrtomb wcstod wmemcmp
734 iswupper wcscat wcstof wmemcpy
735 iswxdigit wcschr wcstoimax wmemmove
736 mblen wcscmp wcstok wmemset
737 mbrlen wcscoll wcstol
738 mbrtowc wcscpy wcstold
740 config OPTION_POSIX_REGEXP
741 bool "Regular expressions"
743 This option group includes the POSIX regular expression
744 functions, and the associated non-POSIX extensions and
745 compatibility functions.
747 With OPTION_POSIX_REGEXP disabled, the following functions are
750 re_comp re_max_failures regcomp
751 re_compile_fastmap re_search regerror
752 re_compile_pattern re_search_2 regexec
753 re_exec re_set_registers regfree
754 re_match re_set_syntax rpmatch
755 re_match_2 re_syntax_options
757 Furthermore, the compatibility regexp interface defined in the
758 <regexp.h> header file, 'compile', 'step', and 'advance', is
761 config OPTION_POSIX_REGEXP_GLIBC
762 bool "Regular expressions from GLIBC"
763 depends OPTION_POSIX_REGEXP
765 This option group specifies which regular expression
766 library to use. The choice is between regex
767 implementation from GLIBC and regex implementation from
768 libiberty. The GLIBC variant is fully POSIX conformant and
769 optimized for speed; regex from libiberty is more than twice
770 as small while still is enough for most practical purposes.
772 config OPTION_POSIX_WIDE_CHAR_DEVICE_IO
773 bool "Input and output functions for wide characters"
774 depends OPTION_POSIX_C_LANG_WIDE_CHAR
776 This option group includes functions for reading and writing
777 wide characters to and from <stdio.h> streams.
779 This option group includes the following functions:
781 fgetwc fwprintf putwchar vwscanf
782 fgetws fwscanf ungetwc wprintf
783 fputwc getwc vfwprintf wscanf
784 fputws getwchar vfwscanf
787 This option group further includes the following unlocked
788 variants of the above functions:
790 fgetwc_unlocked getwc_unlocked
791 fgetws_unlocked getwchar_unlocked
792 fputwc_unlocked putwc_unlocked
793 fputws_unlocked putwchar_unlocked
795 Note that the GNU standard C++ library, 'libstdc++.so', uses
796 some of these functions; you will not be able to link or run
797 C++ programs if you disable this option group.
799 This option group also affects the behavior of the following
808 These functions all take an OPENTYPE parameter which may
809 contain a string of the form ",ccs=CHARSET", indicating that
810 the underlying file uses the character set named CHARSET.
811 This produces a wide-oriented stream, which is only useful
812 when the functions included in this option group are present.
813 If the user attempts to open a file specifying a character set
814 in the OPENTYPE parameter, and EGLIBC was built with this
815 option group disabled, the function returns NULL, and sets
819 # This helps Emacs users browse this file using the page motion commands
820 # and commands like 'pages-directory'.
822 # page-delimiter: "^config\\s-"