toolchain/eglibc/config/Config.in

   1 config EGLIBC_OPTION_EGLIBC_ADVANCED_INET6
   2         bool "IPv6 Advanced Sockets API support (RFC3542)"
   3         default y
   4         select EGLIBC_OPTION_EGLIBC_INET
   5         help
   6           This option group includes the functions specified by RFC 3542,
   7           "Advanced Sockets Application Program Interface (API) for
   8           IPv6".
   9
  10           This option group includes the following functions:
  11
  12                 inet6_opt_append
  13                 inet6_opt_find
  14                 inet6_opt_finish
  15                 inet6_opt_get_val
  16                 inet6_opt_init
  17                 inet6_option_alloc
  18                 inet6_option_append
  19                 inet6_option_find
  20                 inet6_option_init
  21                 inet6_option_next
  22                 inet6_option_space
  23                 inet6_opt_next
  24                 inet6_opt_set_val
  25                 inet6_rth_add
  26                 inet6_rth_getaddr
  27                 inet6_rth_init
  28                 inet6_rth_reverse
  29                 inet6_rth_segments
  30                 inet6_rth_space
  31
  32
  33 config EGLIBC_OPTION_EGLIBC_BACKTRACE
  34         bool "Functions for producing backtraces"
  35         default y
  36         help
  37           This option group includes functions for producing a list of
  38           the function calls that are currently active in a thread, from
  39           within the thread itself.  These functions are often used
  40           within signal handlers, to produce diagnostic output.
  41
  42           This option group includes the following functions:
  43
  44                 backtrace
  45                 backtrace_symbols
  46                 backtrace_symbols_fd
  47
  48
  49 config EGLIBC_OPTION_EGLIBC_BSD
  50         bool "BSD-specific functions, and their compatibility stubs"
  51         default y
  52         help
  53           This option group includes functions specific to BSD kernels.
  54           A number of these functions have stub versions that are also
  55           included in libraries built for non-BSD systems for
  56           compatibility.
  57
  58           This option group includes the following functions:
  59
  60                 chflags
  61                 fchflags
  62                 lchmod
  63                 revoke
  64                 setlogin
  65
  66
  67 config EGLIBC_OPTION_EGLIBC_CXX_TESTS
  68         bool "Tests that link against the standard C++ library."
  69         default y
  70         select EGLIBC_OPTION_POSIX_WIDE_CHAR_DEVICE_IO
  71         select EGLIBC_OPTION_EGLIBC_LIBM
  72         help
  73           This option group does not include any C library functions;
  74           instead, it controls which EGLIBC tests an ordinary 'make
  75           tests' runs.  With this group disabled, tests that would
  76           normally link against the standard C++ library are not
  77           run.
  78
  79           The standard C++ library depends on the math library 'libm' and
  80           the wide character I/O functions included in EGLIBC.  If those
  81           option groups are disabled, this test must also be disabled.
  82
  83
  84 config EGLIBC_OPTION_EGLIBC_CATGETS
  85         bool "Functions for accessing message catalogs"
  86         default y
  87         select EGLIBC_OPTION_EGLIBC_LOCALE_CODE
  88         help
  89           This option group includes functions for accessing message
  90           catalogs: catopen, catclose, and catgets.
  91
  92           This option group depends on the EGLIBC_OPTION_EGLIBC_LOCALE_CODE
  93           option group; if you disable that, you must also disable this.
  94
  95
  96 config EGLIBC_OPTION_EGLIBC_CHARSETS
  97         bool "iconv/gconv character set conversion libraries"
  98         default y
  99         help
 100
 101           This option group includes support for character sets other
 102           than ASCII (ANSI_X3.4-1968) and Unicode and ISO-10646 in their
 103           various encodings.  This affects both the character sets
 104           supported by the wide and multibyte character functions, and
 105           those supported by the 'iconv' functions.
 106
 107           With this option group disabled, EGLIBC supports only the
 108           following character sets:
 109
 110                 ANSI_X3.4         - ASCII
 111                 ANSI_X3.4-1968
 112                 ANSI_X3.4-1986
 113                 ASCII
 114                 CP367
 115                 CSASCII
 116                 IBM367
 117                 ISO-IR-6
 118                 ISO646-US
 119                 ISO_646.IRV:1991
 120                 OSF00010020
 121                 US
 122                 US-ASCII
 123
 124                 10646-1:1993      - ISO 10646, in big-endian UCS4 form
 125                 10646-1:1993/UCS4
 126                 CSUCS4
 127                 ISO-10646
 128                 ISO-10646/UCS4
 129                 OSF00010104
 130                 OSF00010105
 131                 OSF00010106
 132                 UCS-4
 133                 UCS-4BE
 134                 UCS4
 135
 136                 UCS-4LE           - ISO 10646, in little-endian UCS4 form
 137
 138                 ISO-10646/UTF-8   - ISO 10646, in UTF-8 form
 139                 ISO-10646/UTF8
 140                 ISO-IR-193
 141                 OSF05010001
 142                 UTF-8
 143                 UTF8
 144
 145                 ISO-10646/UCS2    - ISO 10646, in target-endian UCS2 form
 146                 OSF00010100
 147                 OSF00010101
 148                 OSF00010102
 149                 UCS-2
 150                 UCS2
 151
 152                 UCS-2BE           - ISO 10646, in big-endian UCS2 form
 153                 UNICODEBIG
 154
 155                 UCS-2LE           - ISO 10646, in little-endian UCS2 form
 156                 UNICODELITTLE
 157
 158                 WCHAR_T           - EGLIBC's internal form (target-endian,
 159                                                         32-bit ISO 10646)
 160
 161
 162 config EGLIBC_OPTION_EGLIBC_DB_ALIASES
 163         bool "Functions for accessing the mail aliases database"
 164         default y
 165         help
 166           This option group includes functions for looking up mail
 167           aliases in '/etc/aliases' or using nsswitch.  It includes the
 168           following functions:
 169
 170                 endaliasent
 171                 getaliasbyname
 172                 getaliasbyname_r
 173                 getaliasent
 174                 getaliasent_r
 175                 setaliasent
 176
 177           When this option group is disabled, the NSS service libraries
 178           also lack support for querying their mail alias tables.
 179
 180
 181 config EGLIBC_OPTION_EGLIBC_ENVZ
 182         bool "Functions for handling envz-style environment vectors."
 183         default y
 184         help
 185           This option group contains functions for creating and operating
 186           on envz vectors.  An "envz vector" is a vector of strings in a
 187           contiguous block of memory, where each element is a name-value
 188           pair, and elements are separated from their neighbors by null
 189           characters.
 190
 191           This option group includes the following functions:
 192
 193                 envz_add        envz_merge
 194                 envz_entry      envz_remove
 195                 envz_get        envz_strip
 196
 197
 198 config EGLIBC_OPTION_EGLIBC_FCVT
 199         bool "Functions for converting floating-point numbers to strings"
 200         default y
 201         depends EGLIBC_VERSION_2_10
 202         help
 203           This option group includes functions for converting
 204           floating-point numbers to strings.
 205
 206           This option group includes the following functions:
 207
 208                 ecvt           qecvt
 209                 ecvt_r         qecvt_r
 210                 fcvt           qfcvt
 211                 fcvt_r         qfcvt_r
 212                 gcvt           qgcvt
 213
 214
 215 config EGLIBC_OPTION_EGLIBC_FMTMSG
 216         bool "Functions for formatting messages"
 217         default y
 218         depends EGLIBC_VERSION_2_10
 219         help
 220           This option group includes the following functions:
 221
 222                 addseverity    fmtmsg
 223
 224
 225 config EGLIBC_OPTION_EGLIBC_FSTAB
 226         bool "Access functions for 'fstab'"
 227         default y
 228         help
 229           This option group includes functions for reading the mount
 230           point specification table, '/etc/fstab'.  These functions are
 231           not included in the POSIX standard, which provides the
 232           'getmntent' family of functions instead.
 233
 234           This option group includes the following functions:
 235
 236                 endfsent       getfsspec
 237                 getfsent       setfsent
 238                 getfsfile
 239
 240
 241 config EGLIBC_OPTION_EGLIBC_FTRAVERSE
 242         bool "Functions for traversing file hierarchies"
 243         default y
 244         depends EGLIBC_VERSION_2_10
 245         help
 246           This option group includes functions for traversing file
 247           UNIX file hierachies.
 248
 249           This option group includes the following functions:
 250
 251                 fts_open       ftw
 252                 fts_read       nftw
 253                 fts_children   ftw64
 254                 fts_set        nftw64
 255                 fts_close
 256
 257
 258 config EGLIBC_OPTION_EGLIBC_GETLOGIN
 259         bool "The getlogin function"
 260         default y
 261         select EGLIBC_OPTION_EGLIBC_UTMP
 262         help
 263           This function group includes the 'getlogin' and 'getlogin_r'
 264           functions, which return the user name associated by the login
 265           activity with the current process's controlling terminal.
 266
 267           With this option group disabled, the 'glob' function will not
 268           fall back on 'getlogin' to find the user's login name for tilde
 269           expansion when the 'HOME' environment variable is not set.
 270
 271
 272 config EGLIBC_OPTION_EGLIBC_INET
 273         bool "Networking support"
 274         default y
 275         help
 276           This option group includes networking-specific functions and
 277           data.  With EGLIBC_OPTION_EGLIBC_INET disabled, the EGLIBC
 278           installation and API changes as follows:
 279
 280           - The following libraries are not installed:
 281
 282                 libanl
 283                 libnsl
 284                 libnss_compat
 285                 libnss_dns
 286                 libnss_hesiod
 287                 libnss_nis
 288                 libnss_nisplus
 289                 libresolv
 290
 291           - The following functions and variables are omitted from libc:
 292
 293                 authdes_create           hstrerror              svc_fdset
 294                 authdes_getucred         htonl                  svc_getreq
 295                 authdes_pk_create        htons                  svc_getreq_common
 296                 authnone_create          if_freenameindex       svc_getreq_poll
 297                 authunix_create          if_indextoname         svc_getreqset
 298                 authunix_create_default  if_nameindex           svc_max_pollfd
 299                 bindresvport             if_nametoindex         svc_pollfd
 300                 callrpc                  in6addr_any            svcraw_create
 301                 cbc_crypt                in6addr_loopback       svc_register
 302                 clnt_broadcast           inet6_opt_append       svc_run
 303                 clnt_create              inet6_opt_find         svc_sendreply
 304                 clnt_pcreateerror        inet6_opt_finish       svctcp_create
 305                 clnt_perrno              inet6_opt_get_val      svcudp_bufcreate
 306                 clnt_perror              inet6_opt_init         svcudp_create
 307                 clntraw_create           inet6_option_alloc     svcudp_enablecache
 308                 clnt_spcreateerror       inet6_option_append    svcunix_create
 309                 clnt_sperrno             inet6_option_find      svcunixfd_create
 310                 clnt_sperror             inet6_option_init      svc_unregister
 311                 clnttcp_create           inet6_option_next      user2netname
 312                 clntudp_bufcreate        inet6_option_space     xdecrypt
 313                 clntudp_create           inet6_opt_next         xdr_accepted_reply
 314                 clntunix_create          inet6_opt_set_val      xdr_array
 315                 des_setparity            inet6_rth_add          xdr_authdes_cred
 316                 ecb_crypt                inet6_rth_getaddr      xdr_authdes_verf
 317                 endaliasent              inet6_rth_init         xdr_authunix_parms
 318                 endhostent               inet6_rth_reverse      xdr_bool
 319                 endnetent                inet6_rth_segments     xdr_bytes
 320                 endnetgrent              inet6_rth_space        xdr_callhdr
 321                 endprotoent              inet_addr              xdr_callmsg
 322                 endrpcent                inet_aton              xdr_char
 323                 endservent               inet_lnaof             xdr_cryptkeyarg
 324                 ether_aton               inet_makeaddr          xdr_cryptkeyarg2
 325                 ether_aton_r             inet_netof             xdr_cryptkeyres
 326                 ether_hostton            inet_network           xdr_des_block
 327                 ether_line               inet_nsap_addr         xdr_double
 328                 ether_ntoa               inet_nsap_ntoa         xdr_enum
 329                 ether_ntoa_r             inet_ntoa              xdr_float
 330                 ether_ntohost            inet_ntop              xdr_free
 331                 freeaddrinfo             inet_pton              xdr_getcredres
 332                 freeifaddrs              innetgr                xdr_hyper
 333                 gai_strerror             iruserok               xdr_int
 334                 getaddrinfo              iruserok_af            xdr_int16_t
 335                 getaliasbyname           key_decryptsession     xdr_int32_t
 336                 getaliasbyname_r         key_decryptsession_pk  xdr_int64_t
 337                 getaliasent              key_encryptsession     xdr_int8_t
 338                 getaliasent_r            key_encryptsession_pk  xdr_keybuf
 339                 gethostbyaddr            key_gendes             xdr_key_netstarg
 340                 gethostbyaddr_r          key_get_conv           xdr_key_netstres
 341                 gethostbyname            key_secretkey_is_set   xdr_keystatus
 342                 gethostbyname2           key_setnet             xdr_long
 343                 gethostbyname2_r         key_setsecret          xdr_longlong_t
 344                 gethostbyname_r          netname2host           xdrmem_create
 345                 gethostent               netname2user           xdr_netnamestr
 346                 gethostent_r             ntohl                  xdr_netobj
 347                 getifaddrs               ntohs                  xdr_opaque
 348                 getipv4sourcefilter      passwd2des             xdr_opaque_auth
 349                 get_myaddress            pmap_getmaps           xdr_pmap
 350                 getnameinfo              pmap_getport           xdr_pmaplist
 351                 getnetbyaddr             pmap_rmtcall           xdr_pointer
 352                 getnetbyaddr_r           pmap_set               xdr_quad_t
 353                 getnetbyname             pmap_unset             xdrrec_create
 354                 getnetbyname_r           rcmd                   xdrrec_endofrecord
 355                 getnetent                rcmd_af                xdrrec_eof
 356                 getnetent_r              registerrpc            xdrrec_skiprecord
 357                 getnetgrent              res_init               xdr_reference
 358                 getnetgrent_r            rexec                  xdr_rejected_reply
 359                 getnetname               rexec_af               xdr_replymsg
 360                 getprotobyname           rexecoptions           xdr_rmtcall_args
 361                 getprotobyname_r         rpc_createerr          xdr_rmtcallres
 362                 getprotobynumber         rresvport              xdr_short
 363                 getprotobynumber_r       rresvport_af           xdr_sizeof
 364                 getprotoent              rtime                  xdrstdio_create
 365                 getprotoent_r            ruserok                xdr_string
 366                 getpublickey             ruserok_af             xdr_u_char
 367                 getrpcbyname             ruserpass              xdr_u_hyper
 368                 getrpcbyname_r           setaliasent            xdr_u_int
 369                 getrpcbynumber           sethostent             xdr_uint16_t
 370                 getrpcbynumber_r         setipv4sourcefilter    xdr_uint32_t
 371                 getrpcent                setnetent              xdr_uint64_t
 372                 getrpcent_r              setnetgrent            xdr_uint8_t
 373                 getrpcport               setprotoent            xdr_u_long
 374                 getsecretkey             setrpcent              xdr_u_longlong_t
 375                 getservbyname            setservent             xdr_union
 376                 getservbyname_r          setsourcefilter        xdr_unixcred
 377                 getservbyport            svcauthdes_stats       xdr_u_quad_t
 378                 getservbyport_r          svcerr_auth            xdr_u_short
 379                 getservent               svcerr_decode          xdr_vector
 380                 getservent_r             svcerr_noproc          xdr_void
 381                 getsourcefilter          svcerr_noprog          xdr_wrapstring
 382                 h_errlist                svcerr_progvers        xencrypt
 383                 h_errno                  svcerr_systemerr       xprt_register
 384                 herror                   svcerr_weakauth        xprt_unregister
 385                 h_nerr                   svc_exit
 386                 host2netname             svcfd_create
 387
 388           - The rpcgen, nscd, and rpcinfo commands are not installed.
 389
 390           - The 'rpc' file (a text file listing RPC services) is not installed.
 391
 392           Socket-related system calls do not fall in this option group,
 393           because many are also used for other inter-process
 394           communication mechanisms.  For example, the 'syslog' routines
 395           use Unix-domain sockets to communicate with the syslog daemon;
 396           syslog is valuable in non-networked contexts.
 397
 398
 399 config EGLIBC_OPTION_EGLIBC_LIBM
 400         bool "libm (math library)"
 401         default y
 402         help
 403           This option group includes the 'libm' library, containing
 404           mathematical functions.  If this option group is omitted, then
 405           an EGLIBC installation does not include shared or unshared versions
 406           of the math library.
 407
 408           Note that this does not remove all floating-point related
 409           functionality from EGLIBC; for example, 'printf' and 'scanf'
 410           can still print and read floating-point values with this option
 411           group disabled.
 412
 413           Note that the ISO Standard C++ library 'libstdc++' depends on
 414           EGLIBC's math library 'libm'.  If you disable this option
 415           group, you will not be able to build 'libstdc++' against the
 416           resulting EGLIBC installation.
 417
 418
 419 config EGLIBC_OPTION_EGLIBC_LOCALES
 420         bool "Locale definitions"
 421         default y
 422         help
 423           This option group includes all locale definitions other than
 424           that for the "C" locale.  If this option group is omitted, then
 425           only the "C" locale is supported.
 426
 427
 428 config EGLIBC_OPTION_EGLIBC_LOCALE_CODE
 429         bool "Locale functions"
 430         default y
 431         select EGLIBC_OPTION_POSIX_C_LANG_WIDE_CHAR if EGLIBC_VERSION_2_8 || EGLIBC_VERSION_2_9 || EGLIBC_VERSION_2_10
 432         help
 433           This option group includes locale support functions, programs,
 434           and libraries.  With EGLIBC_OPTION_EGLIBC_LOCALE_CODE disabled,
 435           EGLIBC supports only the 'C' locale (also known as 'POSIX'),
 436           and ignores the settings of the 'LANG' and 'LC_*' environment
 437           variables.
 438
 439           With EGLIBC_OPTION_EGLIBC_LOCALE_CODE disabled, the following
 440           functions are omitted from libc:
 441
 442                 duplocale   localeconv  nl_langinfo    rpmatch  strfmon_l
 443                 freelocale  newlocale   nl_langinfo_l  strfmon  uselocale
 444
 445           Furthermore, only the LC_CTYPE and LC_TIME categories of the
 446           standard "C" locale are available.
 447
 448           The EGLIBC_OPTION_EGLIBC_CATGETS option group depends on this option
 449           group; if you disable EGLIBC_OPTION_EGLIBC_LOCALE_CODE, you must also
 450           disable EGLIBC_OPTION_EGLIBC_CATGETS.
 451
 452
 453 config EGLIBC_OPTION_EGLIBC_NIS
 454         bool "Support for NIS, NIS+, and the special 'compat' services."
 455         default y
 456         select EGLIBC_OPTION_EGLIBC_INET
 457         select EGLIBC_OPTION_EGLIBC_SUNRPC
 458         help
 459           This option group includes the NIS, NIS+, and 'compat' Name
 460           Service Switch service libraries.  When it is disabled, those
 461           services libraries are not installed; you should remove any
 462           references to them from your 'nsswitch.conf' file.
 463
 464           This option group depends on the EGLIBC_OPTION_EGLIBC_INET option
 465           group; you must enable that to enable this option group.
 466
 467
 468 config EGLIBC_OPTION_EGLIBC_NSSWITCH
 469         bool "Name service switch (nsswitch) support"
 470         default y
 471         help
 472
 473           This option group includes support for the 'nsswitch' facility.
 474           With this option group enabled, all EGLIBC functions for
 475           accessing various system databases (passwords and groups;
 476           networking; aliases; public keys; and so on) consult the
 477           '/etc/nsswitch.conf' configuration file to decide how to handle
 478           queries.
 479
 480           With this option group disabled, EGLIBC uses a fixed list of
 481           services to satisfy queries on each database, as requested by
 482           configuration files specified when EGLIBC is built.  Your
 483           'option-groups.config' file must set the following two
 484           variables:
 485
 486           EGLIBC_OPTION_EGLIBC_NSSWITCH_FIXED_CONFIG
 487
 488                 Set this to the name of a file whose contents observe the
 489                 same syntax as an ordinary '/etc/nsswitch.conf' file.  The
 490                 EGLIBC build process parses this file just as EGLIBC would
 491                 at run time if EGLIBC_NSSWITCH were enabled, and
 492                 produces a C library that uses the nsswitch service
 493                 libraries to search for database entries as this file
 494                 specifies, instead of consulting '/etc/nsswitch.conf' at run
 495                 time.
 496
 497                 This should be an absolute filename.  The EGLIBC build
 498                 process may use it from several different working
 499                 directories.  It may include references to Makefile
 500                 variables like 'common-objpfx' (the top of the build tree,
 501                 with a trailing slash), or '..' (the top of the source tree,
 502                 with a trailing slash).
 503
 504                 The EGLIBC source tree includes a sample configuration file
 505                 named 'nss/fixed-nsswitch.conf'; for simple configurations,
 506                 you will probably want to delete references to databases not
 507                 needed on your system.
 508
 509           EGLIBC_OPTION_EGLIBC_NSSWITCH_FIXED_FUNCTIONS
 510
 511                 The EGLIBC build process uses this file to decide which
 512                 functions to make available from which service libraries.
 513                 The file 'nss/fixed-nsswitch.functions' serves as a sample
 514                 configuration file for this setting, and explains its syntax
 515                 and meaning in more detail.
 516
 517                 This should be an absolute file name.  The EGLIBC build
 518                 process may use it from several different working
 519                 directories.  It may include references to Makefile
 520                 variables like 'common-objpfx' (the top of the build tree,
 521                 with a trailing slash), or '..' (the top of the source tree,
 522                 with a trailing slash).
 523
 524                 Be sure to mention each function in each service you wish to
 525                 use.  If you do not mention a service's function here, the
 526                 EGLIBC database access functions will not find it, even if
 527                 it is listed in the EGLIBC_OPTION_EGLIBC_NSSWITCH_FIXED_CONFIG
 528                 file.
 529
 530           In this arrangement, EGLIBC will not use the 'dlopen' and
 531           'dlsym' functions to find database access functions.  Instead,
 532           libc hard-codes references to the service libraries' database
 533           access functions.  You must explicitly link your program
 534           against the name service libraries (those whose names start
 535           with 'libnss_', in the sysroot's '/lib' directory) whose
 536           functions you intend to use.  This arrangement helps
 537           system-wide static analysis tools decide which functions a
 538           system actually uses.
 539
 540           Note that some nsswitch service libraries require other option
 541           groups to be enabled; for example, the EGLIBC_INET
 542           option group must be enabled to use the 'libnss_dns.so.2'
 543           service library, which uses the Domain Name System network
 544           protocol to answer queries.
 545
 546
 547 config EGLIBC_OPTION_EGLIBC_RCMD
 548         bool "Support for 'rcmd' and related library functions"
 549         default y
 550         select EGLIBC_OPTION_EGLIBC_INET
 551         help
 552           This option group includes functions for running commands on
 553           remote machines via the 'rsh' protocol, and doing authentication
 554           related to those functions.  This also includes functions that
 555           use the 'rexec' protocol.
 556
 557           This option group includes the following functions:
 558
 559                 rcmd            ruserok
 560                 rcmd_af         ruserok_af
 561                 rexec           iruserok
 562                 rexec_af        iruserok_af
 563                 rresvport       ruserpass
 564                 rresvport_af
 565
 566
 567 config EGLIBC_OPTION_EGLIBC_SPAWN
 568         bool "Support for POSIX posix_spawn functions"
 569         default y
 570         help
 571           This option group includes the POSIX functions for executing
 572           programs in child processes without using 'fork' or 'vfork'.
 573
 574           This option group includes the following functions:
 575
 576                 posix_spawn
 577                 posix_spawnattr_destroy
 578                 posix_spawnattr_getflags
 579                 posix_spawnattr_getpgroup
 580                 posix_spawnattr_getschedparam
 581                 posix_spawnattr_getschedpolicy
 582                 posix_spawnattr_getsigdefault
 583                 posix_spawnattr_getsigmask
 584                 posix_spawnattr_init
 585                 posix_spawnattr_setflags
 586                 posix_spawnattr_setpgroup
 587                 posix_spawnattr_setschedparam
 588                 posix_spawnattr_setschedpolicy
 589                 posix_spawnattr_setsigdefault
 590                 posix_spawnattr_setsigmask
 591                 posix_spawn_file_actions_addclose
 592                 posix_spawn_file_actions_adddup2
 593                 posix_spawn_file_actions_addopen
 594                 posix_spawn_file_actions_destroy
 595                 posix_spawn_file_actions_init
 596                 posix_spawnp
 597
 598           This option group also provides the ability for the iconv,
 599           localedef, and locale programs to operate transparently on
 600           compressed charset definitions.  When this option group is
 601           disabled, those programs will only operate on uncompressed
 602           charmap files.
 603
 604
 605 config EGLIBC_OPTION_EGLIBC_STREAMS
 606         bool "Support for accessing STREAMS."
 607         default y
 608         help
 609           This option group includes functions for reading and writing
 610           messages to and from STREAMS.  The STREAMS interface provides a
 611           uniform mechanism for implementing networking services and other
 612           character-based I/O.  (STREAMS are not to be confused with
 613           <stdio.h> FILE objects, also called 'streams'.)
 614
 615           This option group includes the following functions:
 616
 617                 getmsg          putpmsg
 618                 getpmsg         fattach
 619                 isastream       fdetach
 620                 putmsg
 621
 622
 623 config EGLIBC_OPTION_EGLIBC_SUNRPC
 624         bool "Support for the Sun 'RPC' protocol."
 625         default y
 626         select EGLIBC_OPTION_EGLIBC_INET
 627         help
 628           This option group includes support for the Sun RPC protocols,
 629           including the 'rpcgen' and 'rpcinfo' programs.
 630
 631
 632 config EGLIBC_OPTION_EGLIBC_UTMP
 633         bool "Older access functions for 'utmp' login records"
 634         default y
 635         help
 636           This option group includes the older 'utent' family of
 637           functions for accessing user login records in the 'utmp' file.
 638           POSIX omits these functions in favor of the 'utxent' family,
 639           and they are obsolete on systems other than Linux.
 640
 641           This option group includes the following functions:
 642
 643                 endutent
 644                 getutent
 645                 getutent_r
 646                 getutid
 647                 getutid_r
 648                 getutline
 649                 getutline_r
 650                 logwtmp
 651                 pututline
 652                 setutent
 653                 updwtmp
 654                 utmpname
 655
 656           This option group includes the following libraries:
 657
 658                 libutil.so (and libutil.a)
 659
 660
 661 config EGLIBC_OPTION_EGLIBC_UTMPX
 662         bool "POSIX access functions for 'utmp' login records"
 663         default y
 664         select EGLIBC_OPTION_EGLIBC_UTMP
 665         help
 666           This option group includes the POSIX functions for reading and
 667           writing user login records in the 'utmp' file (usually
 668           '/var/run/utmp').  The POSIX functions operate on 'struct
 669           utmpx' structures, as opposed to the family of older 'utent'
 670           functions, which operate on 'struct utmp' structures.
 671
 672           This option group includes the following functions:
 673
 674                 endutxent
 675                 getutmp
 676                 getutmpx
 677                 getutxent
 678                 getutxid
 679                 getutxline
 680                 pututxline
 681                 setutxent
 682                 updwtmpx
 683                 utmpxname
 684
 685
 686 config EGLIBC_OPTION_EGLIBC_WORDEXP
 687         bool "Shell-style word expansion"
 688         default y
 689         help
 690           This option group includes the 'wordexp' function for
 691           performing word expansion in the manner of the shell, and the
 692           accompanying 'wordfree' function.
 693
 694
 695 config EGLIBC_OPTION_POSIX_C_LANG_WIDE_CHAR
 696         bool "ISO C library wide character functions, excluding I/O"
 697         default y
 698         depends EGLIBC_VERSION_2_8 || EGLIBC_VERSION_2_9 || EGLIBC_VERSION_2_10
 699         help
 700           This option group includes the functions defined by the ISO C
 701           standard for working with wide and multibyte characters in
 702           memory.  Functions for reading and writing wide and multibyte
 703           characters from and to files call in the
 704           EGLIBC_OPTION_POSIX_WIDE_CHAR_DEVICE_IO option group.
 705
 706           This option group includes the following functions:
 707
 708                 btowc         mbsinit       wcscspn       wcstoll
 709                 iswalnum      mbsrtowcs     wcsftime      wcstombs
 710                 iswalpha      mbstowcs      wcslen        wcstoul
 711                 iswblank      mbtowc        wcsncat       wcstoull
 712                 iswcntrl      swprintf      wcsncmp       wcstoumax
 713                 iswctype      swscanf       wcsncpy       wcsxfrm
 714                 iswdigit      towctrans     wcspbrk       wctob
 715                 iswgraph      towlower      wcsrchr       wctomb
 716                 iswlower      towupper      wcsrtombs     wctrans
 717                 iswprint      vswprintf     wcsspn        wctype
 718                 iswpunct      vswscanf      wcsstr        wmemchr
 719                 iswspace      wcrtomb       wcstod        wmemcmp
 720                 iswupper      wcscat        wcstof        wmemcpy
 721                 iswxdigit     wcschr        wcstoimax     wmemmove
 722                 mblen         wcscmp        wcstok        wmemset
 723                 mbrlen        wcscoll       wcstol
 724                 mbrtowc       wcscpy        wcstold
 725
 726
 727 config EGLIBC_OPTION_POSIX_REGEXP
 728         bool "Regular expressions"
 729         default y
 730         help
 731           This option group includes the POSIX regular expression
 732           functions, and the associated non-POSIX extensions and
 733           compatibility functions.
 734
 735           With EGLIBC_OPTION_POSIX_REGEXP disabled, the following functions are
 736           omitted from libc:
 737
 738                 re_comp                 re_max_failures         regcomp
 739                 re_compile_fastmap      re_search               regerror
 740                 re_compile_pattern      re_search_2             regexec
 741                 re_exec                 re_set_registers        regfree
 742                 re_match                re_set_syntax           rpmatch
 743                 re_match_2              re_syntax_options
 744
 745           Furthermore, the compatibility regexp interface defined in the
 746           <regexp.h> header file, 'compile', 'step', and 'advance', is
 747           omitted.
 748
 749
 750 config EGLIBC_OPTION_POSIX_REGEXP_GLIBC
 751         bool "Regular expressions from GLIBC"
 752         default y
 753         depends EGLIBC_VERSION_2_10
 754         select EGLIBC_OPTION_POSIX_REGEXP
 755         help
 756           This option group specifies which regular expression
 757           library to use.  The choice is between regex
 758           implementation from GLIBC and regex implementation from
 759           libiberty.  The GLIBC variant is fully POSIX conformant and
 760           optimized for speed; regex from libiberty is more than twice
 761           as small while still is enough for most practical purposes.
 762
 763
 764 config EGLIBC_OPTION_POSIX_WIDE_CHAR_DEVICE_IO
 765         bool "Input and output functions for wide characters"
 766         default y
 767         select EGLIBC_OPTION_POSIX_C_LANG_WIDE_CHAR if EGLIBC_VERSION_2_8 || EGLIBC_VERSION_2_9 || EGLIBC_VERSION_2_10
 768         help
 769           This option group includes functions for reading and writing
 770           wide characters to and from <stdio.h> streams.
 771
 772           This option group includes the following functions:
 773
 774                 fgetwc        fwprintf      putwchar      vwscanf
 775                 fgetws        fwscanf       ungetwc       wprintf
 776                 fputwc        getwc         vfwprintf     wscanf
 777                 fputws        getwchar      vfwscanf
 778                 fwide         putwc         vwprintf
 779
 780           This option group further includes the following unlocked
 781           variants of the above functions:
 782
 783                 fgetwc_unlocked           getwc_unlocked
 784                 fgetws_unlocked           getwchar_unlocked
 785                 fputwc_unlocked           putwc_unlocked
 786                 fputws_unlocked           putwchar_unlocked
 787
 788           Note that the GNU standard C++ library, 'libstdc++.so', uses
 789           some of these functions; you will not be able to link or run
 790           C++ programs if you disable this option group.
 791
 792           This option group also affects the behavior of the following
 793           functions:
 794
 795                 fdopen
 796                 fopen
 797                 fopen64
 798                 freopen
 799                 freopen64
 800
 801           These functions all take an OPENTYPE parameter which may
 802           contain a string of the form ",ccs=CHARSET", indicating that
 803           the underlying file uses the character set named CHARSET.
 804           This produces a wide-oriented stream, which is only useful
 805           when the functions included in this option group are present.
 806           If the user attempts to open a file specifying a character set
 807           in the OPENTYPE parameter, and EGLIBC was built with this
 808           option group disabled, the function returns NULL, and sets
 809           errno to EINVAL.