mirror of
https://github.com/openwrt/openwrt.git
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904 lines
31 KiB
Plaintext
904 lines
31 KiB
Plaintext
config EGLIBC_OPTION_EGLIBC_ADVANCED_INET6
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bool "IPv6 Advanced Sockets API support (RFC3542)"
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default y
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select EGLIBC_OPTION_EGLIBC_INET
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help
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This option group includes the functions specified by RFC 3542,
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"Advanced Sockets Application Program Interface (API) for
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IPv6".
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This option group includes the following functions:
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inet6_opt_append
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inet6_opt_find
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inet6_opt_finish
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inet6_opt_get_val
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inet6_opt_init
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inet6_option_alloc
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inet6_option_append
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inet6_option_find
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inet6_option_init
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inet6_option_next
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inet6_option_space
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inet6_opt_next
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inet6_opt_set_val
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inet6_rth_add
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inet6_rth_getaddr
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inet6_rth_init
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inet6_rth_reverse
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inet6_rth_segments
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inet6_rth_space
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config EGLIBC_OPTION_EGLIBC_BACKTRACE
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bool "Functions for producing backtraces"
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default y
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help
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This option group includes functions for producing a list of
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the function calls that are currently active in a thread, from
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within the thread itself. These functions are often used
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within signal handlers, to produce diagnostic output.
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This option group includes the following functions:
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backtrace
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backtrace_symbols
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backtrace_symbols_fd
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config EGLIBC_OPTION_EGLIBC_BIG_MACROS
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bool "Use extensive inline code"
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default y
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help
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This option group specifies whether certain pieces of code
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should be inlined to achieve maximum speed. If this option
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group is not selected, function calls will be used instead,
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hence reducing the library footprint.
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config EGLIBC_OPTION_EGLIBC_BSD
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bool "BSD-specific functions, and their compatibility stubs"
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default y
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help
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This option group includes functions specific to BSD kernels.
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A number of these functions have stub versions that are also
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included in libraries built for non-BSD systems for
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compatibility.
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This option group includes the following functions:
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chflags
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fchflags
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lchmod
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revoke
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setlogin
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config EGLIBC_OPTION_EGLIBC_CXX_TESTS
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bool "Tests that link against the standard C++ library."
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default y
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select EGLIBC_OPTION_POSIX_WIDE_CHAR_DEVICE_IO
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select EGLIBC_OPTION_EGLIBC_LIBM
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help
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This option group does not include any C library functions;
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instead, it controls which EGLIBC tests an ordinary 'make
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tests' runs. With this group disabled, tests that would
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normally link against the standard C++ library are not
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run.
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The standard C++ library depends on the math library 'libm' and
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the wide character I/O functions included in EGLIBC. If those
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option groups are disabled, this test must also be disabled.
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config EGLIBC_OPTION_EGLIBC_CATGETS
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bool "Functions for accessing message catalogs"
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default y
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select EGLIBC_OPTION_EGLIBC_LOCALE_CODE
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help
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This option group includes functions for accessing message
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catalogs: catopen, catclose, and catgets.
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This option group depends on the EGLIBC_OPTION_EGLIBC_LOCALE_CODE
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option group; if you disable that, you must also disable this.
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config EGLIBC_OPTION_EGLIBC_CHARSETS
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bool "iconv/gconv character set conversion libraries"
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default y
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help
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This option group includes support for character sets other
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than ASCII (ANSI_X3.4-1968) and Unicode and ISO-10646 in their
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various encodings. This affects both the character sets
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supported by the wide and multibyte character functions, and
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those supported by the 'iconv' functions.
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With this option group disabled, EGLIBC supports only the
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following character sets:
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ANSI_X3.4 - ASCII
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ANSI_X3.4-1968
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ANSI_X3.4-1986
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ASCII
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CP367
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CSASCII
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IBM367
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ISO-IR-6
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ISO646-US
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ISO_646.IRV:1991
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OSF00010020
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US
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US-ASCII
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10646-1:1993 - ISO 10646, in big-endian UCS4 form
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10646-1:1993/UCS4
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CSUCS4
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ISO-10646
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ISO-10646/UCS4
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OSF00010104
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OSF00010105
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OSF00010106
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UCS-4
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UCS-4BE
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UCS4
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UCS-4LE - ISO 10646, in little-endian UCS4 form
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ISO-10646/UTF-8 - ISO 10646, in UTF-8 form
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ISO-10646/UTF8
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ISO-IR-193
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OSF05010001
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UTF-8
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UTF8
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ISO-10646/UCS2 - ISO 10646, in target-endian UCS2 form
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OSF00010100
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OSF00010101
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OSF00010102
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UCS-2
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UCS2
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UCS-2BE - ISO 10646, in big-endian UCS2 form
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UNICODEBIG
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UCS-2LE - ISO 10646, in little-endian UCS2 form
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UNICODELITTLE
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WCHAR_T - EGLIBC's internal form (target-endian,
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32-bit ISO 10646)
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config EGLIBC_OPTION_EGLIBC_CRYPT
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bool "Encryption library"
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default y
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help
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This option group includes the `libcrypt' library which
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provides functions for one-way encryption. Supported
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encryption algorithms include MD5, SHA-256, SHA-512 and DES.
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config EGLIBC_OPTION_EGLIBC_CRYPT_UFC
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bool "Ultra fast `crypt' implementation"
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default y
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select EGLIBC_OPTION_EGLIBC_CRYPT
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help
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This option group provides ultra fast DES-based implementation of
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the `crypt' function. When this option group is disabled,
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(a) the library will not provide the setkey[_r] and encrypt[_r]
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functions and (b) the crypt[_r] function will return NULL and set the
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errno to ENOSYS if /salt/ passed does not correspond to either MD5,
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SHA-256 or SHA-512 algorithm.
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config EGLIBC_OPTION_EGLIBC_DB_ALIASES
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bool "Functions for accessing the mail aliases database"
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default y
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help
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This option group includes functions for looking up mail
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aliases in '/etc/aliases' or using nsswitch. It includes the
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following functions:
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endaliasent
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getaliasbyname
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getaliasbyname_r
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getaliasent
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getaliasent_r
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setaliasent
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When this option group is disabled, the NSS service libraries
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also lack support for querying their mail alias tables.
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config EGLIBC_OPTION_EGLIBC_ENVZ
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bool "Functions for handling envz-style environment vectors."
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default y
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help
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This option group contains functions for creating and operating
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on envz vectors. An "envz vector" is a vector of strings in a
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contiguous block of memory, where each element is a name-value
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pair, and elements are separated from their neighbors by null
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characters.
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This option group includes the following functions:
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envz_add envz_merge
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envz_entry envz_remove
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envz_get envz_strip
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config EGLIBC_OPTION_EGLIBC_FCVT
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bool "Functions for converting floating-point numbers to strings"
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default y
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help
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This option group includes functions for converting
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floating-point numbers to strings.
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This option group includes the following functions:
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ecvt qecvt
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ecvt_r qecvt_r
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fcvt qfcvt
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fcvt_r qfcvt_r
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gcvt qgcvt
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config EGLIBC_OPTION_EGLIBC_FMTMSG
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bool "Functions for formatting messages"
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default y
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help
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This option group includes the following functions:
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addseverity fmtmsg
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config EGLIBC_OPTION_EGLIBC_FSTAB
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bool "Access functions for 'fstab'"
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default y
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help
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This option group includes functions for reading the mount
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point specification table, '/etc/fstab'. These functions are
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not included in the POSIX standard, which provides the
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'getmntent' family of functions instead.
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This option group includes the following functions:
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endfsent getfsspec
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getfsent setfsent
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getfsfile
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config EGLIBC_OPTION_EGLIBC_FTRAVERSE
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bool "Functions for traversing file hierarchies"
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default y
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help
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This option group includes functions for traversing file
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UNIX file hierachies.
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This option group includes the following functions:
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fts_open ftw
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fts_read nftw
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fts_children ftw64
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fts_set nftw64
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fts_close
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config EGLIBC_OPTION_EGLIBC_GETLOGIN
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bool "The getlogin function"
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default y
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select EGLIBC_OPTION_EGLIBC_UTMP
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help
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This function group includes the 'getlogin' and 'getlogin_r'
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functions, which return the user name associated by the login
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activity with the current process's controlling terminal.
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With this option group disabled, the 'glob' function will not
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fall back on 'getlogin' to find the user's login name for tilde
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expansion when the 'HOME' environment variable is not set.
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config EGLIBC_OPTION_EGLIBC_IDN
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bool "International domain names support"
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default y
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help
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This option group includes the `libcidn' library which
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provides support for international domain names.
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config EGLIBC_OPTION_EGLIBC_INET
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bool "Networking support"
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default y
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help
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This option group includes networking-specific functions and
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data. With EGLIBC_OPTION_EGLIBC_INET disabled, the EGLIBC
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installation and API changes as follows:
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- The following libraries are not installed:
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libanl
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libnsl
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libnss_compat
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libnss_dns
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libnss_hesiod
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libnss_nis
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libnss_nisplus
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libresolv
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- The following functions and variables are omitted from libc:
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authdes_create hstrerror svc_fdset
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authdes_getucred htonl svc_getreq
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authdes_pk_create htons svc_getreq_common
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authnone_create if_freenameindex svc_getreq_poll
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authunix_create if_indextoname svc_getreqset
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authunix_create_default if_nameindex svc_max_pollfd
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bindresvport if_nametoindex svc_pollfd
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callrpc in6addr_any svcraw_create
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cbc_crypt in6addr_loopback svc_register
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clnt_broadcast inet6_opt_append svc_run
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clnt_create inet6_opt_find svc_sendreply
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clnt_pcreateerror inet6_opt_finish svctcp_create
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clnt_perrno inet6_opt_get_val svcudp_bufcreate
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clnt_perror inet6_opt_init svcudp_create
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clntraw_create inet6_option_alloc svcudp_enablecache
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clnt_spcreateerror inet6_option_append svcunix_create
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clnt_sperrno inet6_option_find svcunixfd_create
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clnt_sperror inet6_option_init svc_unregister
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clnttcp_create inet6_option_next user2netname
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clntudp_bufcreate inet6_option_space xdecrypt
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clntudp_create inet6_opt_next xdr_accepted_reply
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clntunix_create inet6_opt_set_val xdr_array
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des_setparity inet6_rth_add xdr_authdes_cred
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ecb_crypt inet6_rth_getaddr xdr_authdes_verf
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endaliasent inet6_rth_init xdr_authunix_parms
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endhostent inet6_rth_reverse xdr_bool
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endnetent inet6_rth_segments xdr_bytes
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endnetgrent inet6_rth_space xdr_callhdr
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endprotoent inet_addr xdr_callmsg
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endrpcent inet_aton xdr_char
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endservent inet_lnaof xdr_cryptkeyarg
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ether_aton inet_makeaddr xdr_cryptkeyarg2
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ether_aton_r inet_netof xdr_cryptkeyres
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ether_hostton inet_network xdr_des_block
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ether_line inet_nsap_addr xdr_double
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ether_ntoa inet_nsap_ntoa xdr_enum
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ether_ntoa_r inet_ntoa xdr_float
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ether_ntohost inet_ntop xdr_free
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freeaddrinfo inet_pton xdr_getcredres
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freeifaddrs innetgr xdr_hyper
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gai_strerror iruserok xdr_int
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getaddrinfo iruserok_af xdr_int16_t
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getaliasbyname key_decryptsession xdr_int32_t
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getaliasbyname_r key_decryptsession_pk xdr_int64_t
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getaliasent key_encryptsession xdr_int8_t
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getaliasent_r key_encryptsession_pk xdr_keybuf
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gethostbyaddr key_gendes xdr_key_netstarg
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gethostbyaddr_r key_get_conv xdr_key_netstres
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gethostbyname key_secretkey_is_set xdr_keystatus
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gethostbyname2 key_setnet xdr_long
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gethostbyname2_r key_setsecret xdr_longlong_t
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gethostbyname_r netname2host xdrmem_create
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gethostent netname2user xdr_netnamestr
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gethostent_r ntohl xdr_netobj
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getifaddrs ntohs xdr_opaque
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getipv4sourcefilter passwd2des xdr_opaque_auth
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get_myaddress pmap_getmaps xdr_pmap
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getnameinfo pmap_getport xdr_pmaplist
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getnetbyaddr pmap_rmtcall xdr_pointer
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getnetbyaddr_r pmap_set xdr_quad_t
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getnetbyname pmap_unset xdrrec_create
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getnetbyname_r rcmd xdrrec_endofrecord
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getnetent rcmd_af xdrrec_eof
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getnetent_r registerrpc xdrrec_skiprecord
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getnetgrent res_init xdr_reference
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getnetgrent_r rexec xdr_rejected_reply
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getnetname rexec_af xdr_replymsg
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getprotobyname rexecoptions xdr_rmtcall_args
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getprotobyname_r rpc_createerr xdr_rmtcallres
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getprotobynumber rresvport xdr_short
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getprotobynumber_r rresvport_af xdr_sizeof
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getprotoent rtime xdrstdio_create
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getprotoent_r ruserok xdr_string
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getpublickey ruserok_af xdr_u_char
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getrpcbyname ruserpass xdr_u_hyper
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getrpcbyname_r setaliasent xdr_u_int
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getrpcbynumber sethostent xdr_uint16_t
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getrpcbynumber_r setipv4sourcefilter xdr_uint32_t
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getrpcent setnetent xdr_uint64_t
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getrpcent_r setnetgrent xdr_uint8_t
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getrpcport setprotoent xdr_u_long
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getsecretkey setrpcent xdr_u_longlong_t
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getservbyname setservent xdr_union
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getservbyname_r setsourcefilter xdr_unixcred
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getservbyport svcauthdes_stats xdr_u_quad_t
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getservbyport_r svcerr_auth xdr_u_short
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getservent svcerr_decode xdr_vector
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getservent_r svcerr_noproc xdr_void
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getsourcefilter svcerr_noprog xdr_wrapstring
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h_errlist svcerr_progvers xencrypt
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h_errno svcerr_systemerr xprt_register
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herror svcerr_weakauth xprt_unregister
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h_nerr svc_exit
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host2netname svcfd_create
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- The rpcgen, nscd, and rpcinfo commands are not installed.
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- The 'rpc' file (a text file listing RPC services) is not installed.
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Socket-related system calls do not fall in this option group,
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because many are also used for other inter-process
|
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communication mechanisms. For example, the 'syslog' routines
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use Unix-domain sockets to communicate with the syslog daemon;
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syslog is valuable in non-networked contexts.
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config EGLIBC_OPTION_EGLIBC_INET_ANL
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bool "Asynchronous name lookup"
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default y
|
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select EGLIBC_OPTION_EGLIBC_INET
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help
|
|
This option group includes the `libanl' library which
|
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provides support for asynchronous name lookup.
|
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config EGLIBC_OPTION_EGLIBC_LIBM
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bool "libm (math library)"
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default y
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help
|
|
This option group includes the 'libm' library, containing
|
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mathematical functions. If this option group is omitted, then
|
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an EGLIBC installation does not include shared or unshared versions
|
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of the math library.
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Note that this does not remove all floating-point related
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functionality from EGLIBC; for example, 'printf' and 'scanf'
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can still print and read floating-point values with this option
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group disabled.
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Note that the ISO Standard C++ library 'libstdc++' depends on
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EGLIBC's math library 'libm'. If you disable this option
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group, you will not be able to build 'libstdc++' against the
|
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resulting EGLIBC installation.
|
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|
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config EGLIBC_OPTION_EGLIBC_LIBM_BIG
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bool "Math library size"
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default y
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help
|
|
This option group enables default configuration of the math library.
|
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Not selecting this option group removes most of the extended and
|
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double precision math functions and replaces them with wrappers
|
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to the single precision couterparts.
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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.
|
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|
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config EGLIBC_OPTION_EGLIBC_LOCALES
|
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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.
|
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|
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config EGLIBC_OPTION_EGLIBC_LOCALE_CODE
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bool "Locale functions"
|
|
default y
|
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select EGLIBC_OPTION_POSIX_C_LANG_WIDE_CHAR
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|
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.
|
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|
|
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 n
|
|
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 n
|
|
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.
|