doc: Mention fsusage.

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Important notes
---------------

2010-09-04  gnulib-tool     The option '--import' is no longer cumulative; it
                            now expects the complete list of modules and other
                            options on the command line. If you want to
                            augment (not set) the list of modules, use the
                            new option '--add-import' instead of '--import'.

User visible incompatible changes
---------------------------------

Date        Modules         Changes

2011-07-24  close           This module no longer pulls in the 'fclose' module.
                            If your code creates a socket descriptor using
                            socket() or accept(), then a FILE stream referring
                            to it using fdopen(), then in order to close this
                            stream, you need the 'fclose' module.

2011-07-12  arg-nonnull     Renamed to snippet/arg-nonnull.
            c++defs         Renamed to snippet/c++defs.
            link-warning    Renamed to snippet/link-warning.
            unused-parameter Renamed to snippet/unused-parameter.
            warn-on-use     Renamed to snippet/warn-on-use.

2011-06-15  verify          verify_true (V) is deprecated; please use
                            verify_expr (V, 1) instead.

2011-06-05  ansi-c++-opt    When a C++ compiler is not found, the variable CXX
                            is now set to "no", not to ":".

2011-05-11  group-member    The include file is changed from "group-member.h"
                            to <unistd.h>.

2011-05-02  exit            The module is removed.  It was deprecated
                            on 2010-03-05.  Use 'stdlib' directly instead.

2011-04-27  mgetgroups      The 'xgetgroups' function has been split into
                            a new 'xgetgroups' module.

2011-04-27  save-cwd        This module pulls in fewer dependencies by
                            default; to retain robust handling of directories
                            with an absolute name longer than PATH_MAX, you
                            must now explicitly include the 'getcwd' module.

2011-04-19  close-hook      This module has been renamed to 'fd-hook' and
                            generalized.

2011-03-08  regex-quote     The last argument is no longer an 'int cflags'
                            but instead a pointer to a previously constructed
                            'struct regex_quote_spec'.

2011-02-25  dirname         These modules no longer put #defines for the
            dirname-lgpl    following symbols into <config.h>: ISSLASH,
            backupfile      FILE_SYSTEM_ACCEPTS_DRIVE_LETTER_PREFIX,
            lstat           FILE_SYSTEM_BACKSLASH_IS_FILE_NAME_SEPARATOR,
            openat          FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE.
            remove          Applications that need ISSLASH can include the new
            rmdir           header dosname.h.
            savewd
            stat
            unlink

2011-02-14  getloadavg      This module no longer #defines C_GETLOADAVG or
                            HAVE_GETLOADAVG, as the application no longer needs
                            to worry about how getloadavg is defined.  It no
                            longer defines the obsolete symbol NLIST_NAME_UNION
                            (which should have been internal to the module
                            anyway).  Also, support for setgid use has been
                            removed, as nobody seems to be using it; thus
                            GETLOADAVG_PRIVILEGED is no longer #defined and
                            KMEM_GROUP and NEED_SETGID are no longer
                            substituted for.

2011-02-08  stdlib          Unless the random_r module is also used, this
                            module no longer guarantees that the following are
                            defined: struct random_data, RAND_MAX, random_r,
                            srandom_r, initstate_r, setstate_r.

2011-02-08  wctype-h        This module no longer provides the iswblank()
                            function. If you need this function, you now need
                            to request the 'iswblank' module.

2011-02-07  wctype          This module is renamed to wctype-h.

2011-01-18  multiarch       This no longer #defines AA_APPLE_UNIVERSAL_BUILD;
                            instead, use the shell var APPLE_UNIVERSAL_BUILD.

2010-12-10  pipe            This module is renamed to spawn-pipe. The include
                            file is renamed to "spawn-pipe.h".

2010-10-05  getdate         This module is deprecated. Please use the new
                            parse-datetime module for the replacement
                            function parse_datetime(), or help us write
                            getdate-posix for getdate(). Also, the header
                            "getdate.h" has been renamed "parse-datetime.h",
                            and doc/getdate.texi to doc/parse-datetime.texi.

2010-09-29  sys_wait        This module no longer provides the waitpid()
                            function. If you need this function, you now need
                            to request the 'waitpid' module.

2010-09-17  utimens         The function gl_futimens is removed, and its
                            signature has been migrated to fdutimens.  Callers
                            of gl_futimens should change function name, and
                            callers of fdutimens should swap parameter order.

2010-09-17  fdutimensat     This function has a new signature: the fd now comes
                            first instead of the dir/name pair, and a new
                            atflag parameter is added at the end.  Old code
                            should rearrange parameters, and pass 0 for atflag.

2010-09-13  regex           The module is not guaranteeing anymore support for
                            64-bit regoff_t on 64-bit systems.  The size of
                            regoff_t will always be 32-bit unless the program
                            is being configured --with-included-regex.  This
                            may change again in the future once glibc provides
                            this feature as well.

2010-09-12  savedir         The fdsavedir function is now deprecated.

2010-09-10  fcntl-h         This module now defaults O_CLOEXEC to 0, and
                            it defaults O_EXEC and O_SEARCH to O_RDONLY.
                            Use "#if O_CLOEXEC" instead of "#ifdef O_CLOEXEC".

2010-08-28  realloc         This module is deprecated. Use 'realloc-gnu'
                            instead. It will be removed 2012-01-01.

2010-08-28  calloc          This module is deprecated. Use 'calloc-gnu'
                            instead. It will be removed 2012-01-01.

2010-08-28  malloc          This module is deprecated. Use 'malloc-gnu'
                            instead. It will be removed 2012-01-01.

2010-08-14  memxfrm         This module is renamed to amemxfrm. The include
                            file is renamed to "amemxfrm.h". The function is
                            renamed to amemxfrm.

2010-08-09  symlinkat       This module now only provides symlinkat; use the
                            new module 'readlinkat' if needed.

2010-07-31  ansi-c++-opt    If Autoconf >= 2.66 is used, the 'configure'
                            option is now called --disable-c++ rather than
                            --disable-cxx.

2010-04-02  maintainer-makefile
                            The macro _prohibit_regexp has been revamped into
                            a new macro _sc_search_regexp; custom syntax
                            checks in your cfg.mk will need to be rewritten.

2010-03-28  lib-ignore      This module now provides a variable
                            IGNORE_UNUSED_LIBRARIES_CFLAGS that you should
                            add to LDFLAGS (when linking C programs only) or
                            CFLAGS yourself. It is no longer added to LDFLAGS
                            automatically.

2010-03-18  pty             This module now only declares the pty.h header.
                            Use the new modules 'forkpty' or 'openpty' to
                            get the functions that were previously provided.

2010-03-05  exit            This module is deprecated, use 'stdlib' directly
                            instead.  It will be removed 2011-01-01.

2009-12-13  sublist         The module does not define functions any more that
                            call xalloc_die() in out-of-memory situations. Use
                            module 'xsublist' and include file "gl_xsublist.h"
                            instead.

2009-12-13  list            The module does not define functions any more that
                            call xalloc_die() in out-of-memory situations.
                            Use module 'xlist' and include file "gl_xlist.h"
                            instead.

2009-12-13  oset            The module does not define functions any more that
                            call xalloc_die() in out-of-memory situations.
                            Use module 'xoset' and include file "gl_xoset.h"
                            instead.

2009-12-10  *               Most source code files have been converted to
                            indentation by spaces (rather than tabs). Patches
                            of gnulib source code needs to be updated.

2009-12-09  link-warning    The Makefile rules that use $(LINK_WARNING_H) now
                            must contain an explicit dependency on
                            $(LINK_WARNING_H).

2009-11-12  getgroups       These functions now use a signature of gid_t,
            getugroups      rather than GETGROUPS_T.  This probably has no
                            effect except on very old platforms.

2009-11-04  tempname        The gen_tempname function takes an additional
                            'suffixlen' argument. You can safely pass 0.

2009-11-04  nproc           The num_processors function now takes an argument.

2009-11-02  inet_pton       The use of this module now requires linking with
                            $(INET_PTON_LIB).

2009-11-02  inet_ntop       The use of this module now requires linking with
                            $(INET_NTOP_LIB).

2009-10-10  utimens         The use of this module now requires linking with
                            $(LIB_CLOCK_GETTIME).

2009-09-16  canonicalize-lgpl
                            The include file is changed from "canonicalize.h"
                            to <stdlib.h>.

2009-09-04  link-follow     The macro LINK_FOLLOWS_SYMLINK is now tri-state,
                            rather than only defined to 1.

2009-09-03  openat          The include files are standardized to POSIX 2008.
                            For openat, include <fcntl.h>; for
                            fchmodat, fstatat, and mkdirat, include
                            <sys/stat.h>; for fchownat and unlinkat,
                            include <unistd.h>.  For all other
                            functions provided by this module,
                            continue to include "openat.h".

2009-08-30  striconveh      The functions mem_cd_iconveh and str_cd_iconveh
                            now take an 'iconveh_t *' argument instead of three
                            iconv_t arguments.

2009-08-23  tempname        The gen_tempname function takes an additional
                            'flags' argument. You can safely pass 0.

2009-08-12  getopt          This module is deprecated. Please choose among
                            getopt-posix and getopt-gnu. getopt-gnu provides
                            "long options" and "options with optional
                            arguments", getopt-posix doesn't.

2009-06-25  fpurge          The include file is changed from "fpurge.h" to
                            <stdio.h>.

2009-04-26  modules/uniconv/u8-conv-from-enc
            modules/uniconv/u16-conv-from-enc
            modules/uniconv/u32-conv-from-enc
                            The calling convention of the functions
                            u*_conv_from_encoding is changed.

2009-04-26  modules/uniconv/u8-conv-to-enc
            modules/uniconv/u16-conv-to-enc
            modules/uniconv/u32-conv-to-enc
                            The calling convention of the functions
                            u*_conv_to_encoding is changed.

2009-04-24  maintainer-makefile
                            The maint.mk file was copied from
                            coreutils, and the old
                            coverage/gettext/indent rules were
                            re-added.  If you used 'make syntax-check'
                            this will add several new checks.  If some
                            new check is annoying, add the name of the
                            checks to 'local-checks-to-skip' in your
                            cfg.mk.

2009-04-01  visibility      Renamed to lib-symbol-visibility.

2009-04-01  ld-version-script  Renamed to lib-symbol-versions.

2009-03-20  close           The substituted variable LIB_CLOSE is removed.

2009-03-05  filevercmp      Move hidden files up in ordering.

2009-01-22  c-strtod        This function no longer calls xalloc_die(). If
            c-strtold       you want to exit the program in case of out-of-
                            memory, the calling function needs to arrange
                            for it, like this:
                                errno = 0;
                                val = c_strtod (...);
                                if (val == 0 && errno == ENOMEM)
                                  xalloc_die ();

2009-01-17  relocatable-prog  In the Makefile.am or Makefile.in, you now also
                            need to set RELOCATABLE_STRIP = :.

2008-12-22  getaddrinfo     When using this module, you now need to link with
            canon-host      $(GETADDRINFO_LIB).

2008-12-21  mbiter          The header files "mbiter.h", "mbuiter.h",
            mbuiter         "mbfile.h" can now be included without checking
            mbfile          HAVE_MBRTOWC. The macro HAVE_MBRTOWC will no
                            longer be defined by these modules in a year. If
                            you want to continue to use it, you need to invoke
                            AC_FUNC_MBRTOWC yourself.

2008-11-11  warnings        This module subsumes the file m4/warning.m4 which
                            was removed.

2008-10-20  lstat           The include file is changed from "lstat.h" to
                            <sys/stat.h>.

2008-10-20  getaddrinfo     The include file is changed from "getaddrinfo.h"
                            to <netdb.h>.

2008-10-19  isnanf          The include file is changed from "isnanf.h" to
                            <math.h>.
            isnand          The include file is changed from "isnand.h" to
                            <math.h>.
            isnanl          The include file is changed from "isnanl.h" to
                            <math.h>.

2008-10-18  lchmod          The include file is changed from "lchmod.h" to
                            <sys/stat.h>.

2008-10-18  dirfd           The include file is changed from "dirfd.h" to
                            <dirent.h>.

2008-10-18  euidaccess      The include file is changed from "euidaccess.h"
                            to <unistd.h>.

2008-10-18  getdomainname   The include file is changed from "getdomainname.h"
                            to <unistd.h>.

2008-09-28  sockets         When using this module, you now need to link with
                            $(LIBSOCKET).

2008-09-24  sys_select      The limitation on `select', introduced 2008-09-23,
                            was removed.  sys_select now includes a select
                            wrapper for Winsock.  The wrapper expects socket
                            and file descriptors to be compatible as arranged
                            by the sys_socket on MinGW.

2008-09-23  sys_socket      Under Windows (MinGW), the module now adds
                            wrappers around Winsock functions, so that
                            socket descriptors are now compatible with
                            file descriptors.  In general, this change
                            will simply improve your code's portability
                            between POSIX platforms and Windows.  In
                            particular, you will be able to use ioctl and
                            close instead of ioctlsocket and closesocket,
                            and test errno instead of WSAGetLastError ().
                            On the other hand, you have to audit your code to
                            remove usage of these Winsock-specific functions.

                            This change does not remove the need to call
                            the gl_sockets_startup function from the sockets
                            gnulib module.  Also, for now select is disabled
                            when you include the sys_socket module; while
                            the functionality will be restored soon, for
                            efficiency it is suggested to use the poll system
                            poll system call and gnulib module instead.

2008-09-13  EOVERFLOW       The module is removed. Use module errno instead.

2008-09-01  filename        The module does not define the function
                            concatenated_filename any more. To get an
                            equivalent function, use function
                            xconcatenated_filename from module
                            'xconcat-filename'.

2008-08-31  havelib         On Solaris, when searching for 64-bit mode
                            libraries the directory $prefix/lib is now ignored.
                            Instead the directory $prefix/lib/64 is searched.
                            You may need to create a symbolic link for
                            $prefix/lib/64 if you have 64-bit libraries
                            installed in $prefix/lib.

2008-08-19  strverscmp      The include file is changed from "strverscmp.h"
                            to <string.h>.

2008-08-14  lock            The include file is changed from "lock.h"
                            to "glthread/lock.h".
            tls             The include file is changed from "tls.h"
                            to "glthread/tls.h".

2008-07-17  c-stack         The module now requires the addition of
                            $(LIBCSTACK) or $(LTLIBCSTACK) in Makefile.am,
                            since it may depend on linking with libsigsegv.

2008-07-07  isnanf-nolibm   The include file is changed from "isnanf.h"
                            to "isnanf-nolibm.h".
            isnand-nolibm   The include file is changed from "isnand.h"
                            to "isnand-nolibm.h".

2008-06-10  execute         The execute function takes an additional termsigp
                            argument. Passing termsigp = NULL is ok.
            wait-process    The wait_subprocess function takes an additional
                            termsigp argument. Passing termsigp = NULL is ok.

2008-05-10  linebreak       The module is split into several modules unilbrk/*.
                            The include file is changed from "linebreak.h" to
                            "unilbrk.h". Two functions are renamed:
                            mbs_possible_linebreaks -> ulc_possible_linebreaks
                            mbs_width_linebreaks -> ulc_width_linebreaks

2008-04-28  rpmatch         The include file is now <stdlib.h>.

2008-04-28  inet_ntop       The include file is changed from "inet_ntop.h"
                            to <arpa/inet.h>.

2008-04-28  inet_pton       The include file is changed from "inet_pton.h"
                            to <arpa/inet.h>.

2008-03-06  freadahead      The return value's computation has changed. It
                            now increases by 1 after ungetc.

2008-01-26  isnan-nolibm    The module name is changed from isnan-nolibm to
                            isnand-nolibm. The include file is changed from
                            "isnan.h" to "isnand.h". The function that it
                            defines is changed from isnan() to isnand().

2008-01-14  strcasestr      This module now replaces worst-case inefficient
                            implementations; clients that use controlled
                            needles and thus do not care about worst-case
                            efficiency should use the new strcasestr-simple
                            module instead for smaller code size.

2008-01-09  alloca-opt      Now defines HAVE_ALLOCA_H only when the system
                            supplies an <alloca.h>.  Gnulib-using code is now
                            expected to include <alloca.h> unconditionally.
                            Non-gnulib-using code can continue to include
                            <alloca.h> only if HAVE_ALLOCA_H is defined.

2008-01-08  memmem          This module now replaces worst-case inefficient
                            implementations; clients that use controlled
                            needles and thus do not care about worst-case
                            efficiency should use the new memmem-simple
                            module instead for smaller code size.

2007-12-24  setenv          The include file is changed from "setenv.h" to
                            <stdlib.h>. Also, the unsetenv function is no
                            longer declared in this module; use the 'unsetenv'
                            module if you need it.

2007-12-03  getpagesize     The include file is changed from "getpagesize.h"
                            to <unistd.h>.

2007-12-03  strcase         The include file is changed from <string.h> to
                            <strings.h>.

2007-10-07  most modules    The license for most modules has changed from
                            GPLv2+ to GPLv3+, and from LGPLv2+ to LGPLv3+.
                            A few modules are still under LGPLv2+; see the
                            module description for the applicable license.

2007-09-01  linebreak       "linebreak.h" no longer declares the functions
                            locale_charset, uc_width, u{8,16,32}_width. Use
                            "uniwidth.h" to get these functions declared.

2007-08-28  areadlink-with-size
                            Renamed from mreadlink-with-size.
                            Function renamed: mreadlink_with_size ->
                            areadlink_with_size.

2007-08-22  getdelim, getline
                            The include file is changed from "getdelim.h"
                            and "getline.h" to the POSIX 200x <stdio.h>.

2007-08-18  idcache         Now provides prototypes in "idcache.h".

2007-08-10  xstrtol         The STRTOL_FATAL_ERROR macro is removed.
                            Use the new xstrtol_fatal function instead.

2007-08-04  human           The function human_options no longer reports an
                            error to standard error; that is now the
                            caller's responsibility.  It returns an
                            error code of type enum strtol_error
                            instead of the integer option value, and stores
                            the option value via a new int * argument.
            xstrtol         The first two arguments of STRTOL_FATAL_ERROR
                            are now an option name and option argument
                            instead of an option argument and a type string,
                            STRTOL_FAIL_WARN is removed.

2007-07-14  gpl, lgpl       New Texinfo versions with no sectioning commands.

2007-07-10  version-etc     Output now mentions GPLv3+, not GPLv2+.  Use
                            gnulib-tool --local-dir to override this.

2007-07-07  wcwidth         The include file is changed from "wcwidth.h" to
                            <wchar.h>.

2007-07-02  gpl, lgpl       Renamed to gpl-2.0 and lgpl-2.1 respectively.
                            (There is also a new module gpl-3.0.)

2007-06-16  lchown          The include file is changed from "lchown.h" to
                            <unistd.h>.

2007-06-09  xallocsa        Renamed to xmalloca. The include file "xallocsa.h"
                            was remamed to "xmalloca.h". The function was
                            renamed:
                              xallocsa -> xmalloca

2007-06-09  allocsa         Renamed to malloca. The include file "allocsa.h"
                            was remamed to "malloca.h". The function-like
                            macros were renamed:
                              allocsa -> malloca
                              freesa -> freea

2007-05-20  utimens         Renamed futimens to gl_futimens, to avoid
                            conflict with the glibc-2.6-introduced function
                            that has a different signature.

2007-05-01  sigprocmask     The module now depends on signal, so replace
                              #include "sigprocmask.h"
                            with
                              #include <signal.h>

2007-04-06  gettext         The macro HAVE_LONG_DOUBLE is no longer set.
                            You can replace all its uses with 1, i.e. assume
                            'long double' as a type exists.

2007-04-01  arcfour         Renamed to crypto/arcfour.
            arctwo          Renamed to crypto/arctwo.
            des             Renamed to crypto/des.
            gc              Renamed to crypto/gc.
            gc-arcfour      Renamed to crypto/gc-arcfour.
            gc-arctwo       Renamed to crypto/gc-arctwo.
            gc-des          Renamed to crypto/gc-des.
            gc-hmac-md5     Renamed to crypto/gc-hmac-md5.
            gc-hmac-sha1    Renamed to crypto/gc-hmac-sha1.
            gc-md2          Renamed to crypto/gc-md2.
            gc-md4          Renamed to crypto/gc-md4.
            gc-md5          Renamed to crypto/gc-md5.
            gc-pbkdf2-sha1  Renamed to crypto/gc-pbkdf2-sha1.
            gc-random       Renamed to crypto/gc-random.
            gc-rijndael     Renamed to crypto/gc-rijndael.
            gc-sha1         Renamed to crypto/gc-sha1.
            hmac-md5        Renamed to crypto/hmac-md5.
            hmac-sha1       Renamed to crypto/hmac-sha1.
            md2             Renamed to crypto/md2.
            md4             Renamed to crypto/md4.
            md5             Renamed to crypto/md5.
            rijndael        Renamed to crypto/rijndael.
            sha1            Renamed to crypto/sha1.

2007-03-27  vasprintf       The module now depends on stdio, so replace
                               #include "vasprintf.h"
                            with
                               #include <stdio.h>

2007-03-24  tsearch         The include file is changed from "tsearch.h" to
                            <search.h>.

2007-03-24  utf8-ucs4       The include file is changed from "utf8-ucs4.h"
                            to "unistr.h".
            utf8-ucs4-unsafe  The include file is changed from
                            "utf8-ucs4-unsafe.h" to "unistr.h".
            utf16-ucs4      The include file is changed from "utf16-ucs4.h"
                            to "unistr.h".
            utf16-ucs4-unsafe  The include file is changed from
                            "utf16-ucs4-unsafe.h" to "unistr.h".
            ucs4-utf8       The include file is changed from "ucs4-utf8.h"
                            to "unistr.h".
            ucs4-utf16      The include file is changed from "ucs4-utf16.h"
                            to "unistr.h".

2007-03-19  iconvme         The module is removed. Use module striconv instead:
                            iconv_string -> str_iconv
                            iconv_alloc -> str_cd_iconv (with reversed
                                           arguments)

2007-03-15  list            The functions gl_list_create_empty and
            array-list      gl_list_create now take an extra fourth argument.
            carray-list     You can pass NULL.
            linked-list
            linkedhash-list
            avltree-list
            rbtree-list
            avltreehash-list
            rbtreehash-list

2007-03-15  oset            The function gl_oset_create_empty now takes a
            array-oset      third argument. You can pass NULL.
            avltree-oset
            rbtree-oset

2007-03-12  des             The types and functions in lib/des.h have been
            gc-des          renamed:

                            des_ctx -> gl_des_ctx, tripledes_ctx -> gl_3des_ctx,
                            des_is_weak_key -> gl_des_is_weak_key,
                            des_setkey -> gl_des_setkey,
                            des_makekey -> gl_des_makekey,
                            des_ecb_crypt -> gl_des_ecb_crypt,
                            des_ecb_encrypt -> gl_des_ecb_encrypt,
                            des_ecb_decrypt -> gl_des_ecb_decrypt,
                            tripledes_set2keys -> gl_3des_set2keys,
                            tripledes_set3keys -> gl_3des_set3keys,
                            tripledes_makekey -> gl_3des_makekey,
                            tripledes_ecb_crypt -> gl_3des_ecb_crypt.

                            Also consider using the "gc-des" buffer instead of
                            using the "des" module directly.

2007-02-28  xreadlink       The module xreadlink was renamed to
                            xreadlink-with-size. The function was renamed:
                            xreadlink -> xreadlink_with_size.

2007-02-18  exit            The modules now depend on stdlib, so replace
            mkdtemp           #include "exit.h"
            mkstemp           #include "mkdtemp.h"
                              #include "mkstemp.h"
                            with
                              #include <stdlib.h>

2007-01-26  strdup          The module now depends on string, so replace
                              #include "strdup.h"
                            with
                              #include <string.h>

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