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941 lines
35 KiB
XML
941 lines
35 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-system-glibc" role="wrap">
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<?dbhtml filename="glibc.html"?>
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<sect1info condition="script">
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<productname>glibc</productname>
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<productnumber>&glibc-version;</productnumber>
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<address>&glibc-url;</address>
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</sect1info>
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<title>Glibc-&glibc-version;</title>
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<indexterm zone="ch-system-glibc">
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<primary sortas="a-Glibc">Glibc</primary>
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</indexterm>
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<sect2 role="package">
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<title/>
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<para>The Glibc package contains the main C library. This library provides
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the basic routines for allocating memory, searching directories, opening and
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closing files, reading and writing files, string handling, pattern matching,
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arithmetic, and so on.</para>
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<segmentedlist>
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<segtitle>&buildtime;</segtitle>
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<segtitle>&diskspace;</segtitle>
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<seglistitem>
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<seg>&glibc-ch6-sbu;</seg>
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<seg>&glibc-ch6-du;</seg>
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</seglistitem>
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</segmentedlist>
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</sect2>
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<sect2 role="installation">
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<title>Installation of Glibc</title>
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<note>
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<para>Some packages outside of LFS suggest installing GNU libiconv in
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order to translate data from one encoding to another. The project's
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home page (<ulink url="http://www.gnu.org/software/libiconv/"/>) says
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<quote>This library provides an <function>iconv()</function>
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implementation, for use on systems which don't have one, or whose
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implementation cannot convert from/to Unicode.</quote> Glibc provides
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an <function>iconv()</function> implementation and can convert from/to
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Unicode, therefore libiconv is not required on an LFS system.</para>
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</note>
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<para>First fix a minor problem when installing the tzselect script:</para>
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<screen><userinput remap="pre">sed -i 's/\\$$(pwd)/`pwd`/' timezone/Makefile</userinput></screen>
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<para>Some of the Glibc programs use non-FHS compilant
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<filename class="directory">/var/db</filename> directory to store
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their runtime data. Apply the following patch to make such programs
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store their runtime data in the FHS-compliant locations:</para>
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<screen><userinput remap="pre">patch -Np1 -i ../&glibc-fhs-patch;</userinput></screen>
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<para>The Glibc build system is self-contained and will install
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perfectly, even though the compiler specs file and linker are still
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pointing at <filename class="directory">/tools</filename>. The specs
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and linker cannot be adjusted before the Glibc install because the
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Glibc autoconf tests would give false results and defeat the goal
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of achieving a clean build.</para>
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<para>The Glibc documentation recommends building Glibc outside of the source
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directory in a dedicated build directory:</para>
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<screen><userinput remap="pre">mkdir -v ../glibc-build
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cd ../glibc-build</userinput></screen>
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<para>Prepare Glibc for compilation:</para>
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<screen><userinput remap="configure">../glibc-&glibc-version;/configure \
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--prefix=/usr \
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--disable-profile \
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--enable-kernel=&min-kernel; \
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--enable-obsolete-rpc</userinput></screen>
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<variablelist>
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<title>The meaning of the new configure options:</title>
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<varlistentry>
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<term><parameter>--enable-obsolete-rpc</parameter></term>
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<listitem>
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<para>Installs NIS and RPC related headers that are not installed by
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default; these are required to rebuild Glibc and by several BLFS
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packages.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>Compile the package:</para>
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<screen><userinput remap="make">make</userinput></screen>
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<important>
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<para>In this section, the test suite for Glibc is considered critical.
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Do not skip it under any circumstance.</para>
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</important>
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<para>Generally a few tests do not pass, but you can generally ignore
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any of the test failures listed below. Now test the build results:</para>
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<screen><userinput remap="test">make -k check 2>&1 | tee glibc-check-log
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grep Error glibc-check-log</userinput></screen>
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<para>You will probably see an expected (ignored) failure in the
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<emphasis>posix/annexc</emphasis> and
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<emphasis>conform/run-conformtest</emphasis> tests. In addition the Glibc
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test suite is somewhat dependent on the host system. This is a list of the
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most common issues:</para>
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<itemizedlist>
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<listitem>
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<para>The <emphasis>nptl/tst-clock2</emphasis>,
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<emphasis>nptl/tst-attr3</emphasis>,
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<emphasis>tst/tst-cputimer1</emphasis>, and
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<emphasis>rt/tst-cpuclock2</emphasis>
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tests have been known to fail. The
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reason is not completely understood, but indications are that minor
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timing issues can trigger these failures.</para>
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</listitem>
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<listitem>
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<para>The math tests sometimes fail when running on
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systems where the CPU is not a relatively new genuine Intel or
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authentic AMD processor.</para>
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</listitem>
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<listitem>
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<para>When running on older and slower hardware or on systems under
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load, some tests can fail because of test timeouts being exceeded.
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Modifying the make check command to set a TIMEOUTFACTOR is reported to
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help eliminate these errors (e.g. <command>TIMEOUTFACTOR=16
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make -k check</command>).</para>
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</listitem>
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<listitem>
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<para>posix/tst-getaddrinfo4 will always fail due to not having a network
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connection when the test is run.</para>
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</listitem>
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<listitem>
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<para>libio/tst-ftell-partial-wide.out fails because it needs a locale
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that has not yet been generated.</para>
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</listitem>
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<listitem>
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<para>Other tests known to fail on some architectures are posix/bug-regex32,
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misc/tst-writev, elf/check-textrel, nptl/tst-getpid2, nptl/tst-robust8,
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and stdio-common/bug22.</para>
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</listitem>
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</itemizedlist>
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<para>Though it is a harmless message, the install stage of Glibc will
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complain about the absence of <filename>/etc/ld.so.conf</filename>.
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Prevent this warning with:</para>
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<screen><userinput remap="install">touch /etc/ld.so.conf</userinput></screen>
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<para>Install the package:</para>
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<screen><userinput remap="install">make install</userinput></screen>
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<para>Install the configuration file and runtime directory for
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<command>nscd</command>:</para>
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<screen><userinput remap="install">cp -v ../glibc-&glibc-version;/nscd/nscd.conf /etc/nscd.conf
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mkdir -pv /var/cache/nscd</userinput></screen>
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<para>The locales that can make the system respond in a different language
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were not installed by the above command. None of the locales are required,
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but if some of them are missing, test suites of the future packages would
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skip important testcases.</para>
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<para>Individual locales can be installed using the
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<command>localedef</command> program. E.g., the first
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<command>localedef</command> command below combines the
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<filename>/usr/share/i18n/locales/cs_CZ</filename>
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charset-independent locale definition with the
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<filename>/usr/share/i18n/charmaps/UTF-8.gz</filename>
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charmap definition and appends the result to the
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<filename>/usr/lib/locale/locale-archive</filename> file.
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The following instructions will install the minimum set of
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locales necessary for the optimal coverage of tests:</para>
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<screen role="nodump"><userinput remap="locale-test">mkdir -pv /usr/lib/locale
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localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
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localedef -i de_DE -f ISO-8859-1 de_DE
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localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
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localedef -i de_DE -f UTF-8 de_DE.UTF-8
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localedef -i en_GB -f UTF-8 en_GB.UTF-8
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localedef -i en_HK -f ISO-8859-1 en_HK
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localedef -i en_PH -f ISO-8859-1 en_PH
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localedef -i en_US -f ISO-8859-1 en_US
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localedef -i en_US -f UTF-8 en_US.UTF-8
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localedef -i es_MX -f ISO-8859-1 es_MX
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localedef -i fa_IR -f UTF-8 fa_IR
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localedef -i fr_FR -f ISO-8859-1 fr_FR
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localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
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localedef -i fr_FR -f UTF-8 fr_FR.UTF-8
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localedef -i it_IT -f ISO-8859-1 it_IT
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localedef -i it_IT -f UTF-8 it_IT.UTF-8
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localedef -i ja_JP -f EUC-JP ja_JP
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localedef -i ru_RU -f KOI8-R ru_RU.KOI8-R
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localedef -i ru_RU -f UTF-8 ru_RU.UTF-8
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localedef -i tr_TR -f UTF-8 tr_TR.UTF-8
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localedef -i zh_CN -f GB18030 zh_CN.GB18030</userinput></screen>
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<para>In addition, install the locale for your own country, language and
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character set.</para>
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<para>Alternatively, install all locales listed in the
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<filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
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(it includes every locale listed above and many more) at once with the
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following time-consuming command:</para>
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<screen><userinput remap="locale-full">make localedata/install-locales</userinput></screen>
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<para>Then use the <command>localedef</command> command to create and
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install locales not listed in the
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<filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
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in the unlikely case you need them.</para>
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</sect2>
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<sect2 id="conf-glibc" role="configuration">
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<title>Configuring Glibc</title>
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<indexterm zone="conf-glibc">
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<primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
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</indexterm>
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<indexterm zone="conf-glibc">
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<primary sortas="e-/etc/localtime">/etc/localtime</primary>
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</indexterm>
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<para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
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because, although Glibc provides defaults when this file is missing or corrupt,
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the Glibc defaults do not work well in a networked environment. The time zone
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also needs to be configured.</para>
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<para>Create a new file <filename>/etc/nsswitch.conf</filename> by running the
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following:</para>
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<screen><userinput>cat > /etc/nsswitch.conf << "EOF"
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<literal># Begin /etc/nsswitch.conf
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passwd: files
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group: files
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shadow: files
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hosts: files dns
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networks: files
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protocols: files
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services: files
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ethers: files
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rpc: files
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# End /etc/nsswitch.conf</literal>
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EOF</userinput></screen>
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<para>Install timezone data:</para>
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<screen><userinput>tar -xf ../tzdata&tzdata-version;.tar.gz
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ZONEINFO=/usr/share/zoneinfo
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mkdir -pv $ZONEINFO/{posix,right}
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for tz in etcetera southamerica northamerica europe africa antarctica \
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asia australasia backward pacificnew systemv; do
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zic -L /dev/null -d $ZONEINFO -y "sh yearistype.sh" ${tz}
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zic -L /dev/null -d $ZONEINFO/posix -y "sh yearistype.sh" ${tz}
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zic -L leapseconds -d $ZONEINFO/right -y "sh yearistype.sh" ${tz}
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done
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cp -v zone.tab iso3166.tab $ZONEINFO
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zic -d $ZONEINFO -p America/New_York
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unset ZONEINFO</userinput></screen>
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<variablelist>
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<title>The meaning of the zic commands:</title>
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<varlistentry>
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<term><parameter>zic -L /dev/null ...</parameter></term>
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<listitem>
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<para>This creates posix timezones, without any leap seconds. It is
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conventional to put these in both
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<filename class="directory">zoneinfo</filename> and
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<filename class="directory">zoneinfo/posix</filename>. It is
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necessary to put the POSIX timezones in
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<filename class="directory">zoneinfo</filename>, otherwise various
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test-suites will report errors. On an embedded system, where space is
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tight and you do not intend to ever update the timezones, you could save
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1.9MB by not using the <filename class="directory">posix</filename>
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directory, but some applications or test-suites might give less good
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results</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>zic -L leapseconds ...</parameter></term>
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<listitem>
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<para>This creates right timezones, including leap seconds. On an
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embedded system, where space is tight and you do not intend to
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ever update the timezones, or care about the correct time, you could
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save 1.9MB by omitting the <filename class="directory">right</filename>
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directory.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>zic ... -p ...</parameter></term>
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<listitem>
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<para>This creates the <filename>posixrules</filename> file. We use
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New York because POSIX requires the daylight savings time rules
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to be in accordance with US rules.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>One way to determine the local time zone is to run the following
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script:</para>
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<screen role="nodump"><userinput>tzselect</userinput></screen>
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<para>After answering a few questions about the location, the script will
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output the name of the time zone (e.g.,
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<emphasis>America/Edmonton</emphasis>). There are also some other possible
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timezones listed in <filename
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class='directory'>/usr/share/zoneinfo</filename> such as
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<emphasis>Canada/Eastern</emphasis> or <emphasis>EST5EDT</emphasis> that
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are not identified by the script but can be used.</para>
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<para>Then create the <filename>/etc/localtime</filename> file by
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running:</para>
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<screen><userinput>cp -v /usr/share/zoneinfo/<replaceable><xxx></replaceable> /etc/localtime</userinput></screen>
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<para>Replace <replaceable><xxx></replaceable> with the name of the
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time zone selected (e.g., Canada/Eastern).</para>
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</sect2>
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<sect2 id="conf-ld" role="configuration">
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<title>Configuring the Dynamic Loader</title>
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<indexterm zone="conf-ld">
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<primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
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</indexterm>
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<para>By default, the dynamic loader (<filename
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class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
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<filename class="directory">/lib</filename> and <filename
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class="directory">/usr/lib</filename> for dynamic libraries that are
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needed by programs as they are run. However, if there are libraries in
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directories other than <filename class="directory">/lib</filename> and
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<filename class="directory">/usr/lib</filename>, these need to be added
|
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to the <filename>/etc/ld.so.conf</filename> file in order for the
|
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dynamic loader to find them. Two directories that are commonly known
|
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to contain additional libraries are <filename
|
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class="directory">/usr/local/lib</filename> and <filename
|
|
class="directory">/opt/lib</filename>, so add those directories to the
|
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dynamic loader's search path.</para>
|
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<para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
|
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following:</para>
|
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<screen><userinput>cat > /etc/ld.so.conf << "EOF"
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<literal># Begin /etc/ld.so.conf
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/usr/local/lib
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/opt/lib
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</literal>
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EOF</userinput></screen>
|
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<para>If desired, the dynamic loader can also search a directory and
|
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include the contents of files found there. Generally the files in
|
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this include directory are one line specifying the desired library path.
|
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To add this capability run the following commands:</para>
|
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|
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<screen role="nodump"><userinput>cat >> /etc/ld.so.conf << "EOF"
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<literal># Add an include directory
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include /etc/ld.so.conf.d/*.conf
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</literal>
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EOF
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mkdir -pv /etc/ld.so.conf.d</userinput></screen>
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|
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</sect2>
|
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|
|
<sect2 id="contents-glibc" role="content">
|
|
<title>Contents of Glibc</title>
|
|
|
|
<segmentedlist>
|
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<segtitle>Installed programs</segtitle>
|
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<segtitle>Installed libraries</segtitle>
|
|
<segtitle>Installed directories</segtitle>
|
|
|
|
<seglistitem>
|
|
<seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
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|
ldd, lddlibc4, locale, localedef, makedb, mtrace, nscd, pcprofiledump,
|
|
pldd, rpcgen, sln, sotruss, sprof, tzselect, xtrace,
|
|
zdump, and zic</seg>
|
|
<seg>ld.so, libBrokenLocale.{a,so}, libSegFault.so, libanl.{a,so},
|
|
libc.{a,so}, libc_nonshared.a, libcidn.so,
|
|
libcrypt.{a,so}, libdl.{a,so}, libg.a, libieee.a, libm.{a,so},
|
|
libmcheck.a, libmemusage.so, libnsl.{a,so}, libnss_compat.so,
|
|
libnss_dns.so, libnss_files.so, libnss_hesiod.so, libnss_nis.so,
|
|
libnss_nisplus.so, libpcprofile.so, libpthread.{a,so},
|
|
libpthread_nonshared.a, libresolv.{a,so}, librpcsvc.a, librt.{a,so},
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libthread_db.so, and libutil.{a,so}</seg>
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|
<seg>/usr/include/arpa, /usr/include/bits, /usr/include/gnu,
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/usr/include/net, /usr/include/netash, /usr/include/netatalk,
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|
/usr/include/netax25, /usr/include/neteconet, /usr/include/netinet,
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|
/usr/include/netipx, /usr/include/netiucv, /usr/include/netpacket,
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|
/usr/include/netrom, /usr/include/netrose, /usr/include/nfs,
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|
/usr/include/protocols, /usr/include/rpc, /usr/include/rpcsvc,
|
|
/usr/include/sys, /usr/lib/audit, /usr/lib/gconv, /usr/lib/locale,
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|
/usr/libexec/getconf, /usr/share/i18n, /usr/share/zoneinfo,
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/var/cache/nscd, and /var/lib/nss_db</seg>
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|
</seglistitem>
|
|
</segmentedlist>
|
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|
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<variablelist>
|
|
<bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
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<?dbfo list-presentation="list"?>
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<?dbhtml list-presentation="table"?>
|
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<varlistentry id="catchsegv">
|
|
<term><command>catchsegv</command></term>
|
|
<listitem>
|
|
<para>Can be used to create a stack trace when a program
|
|
terminates with a segmentation fault</para>
|
|
<indexterm zone="ch-system-glibc catchsegv">
|
|
<primary sortas="b-catchsegv">catchsegv</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="gencat">
|
|
<term><command>gencat</command></term>
|
|
<listitem>
|
|
<para>Generates message catalogues</para>
|
|
<indexterm zone="ch-system-glibc gencat">
|
|
<primary sortas="b-gencat">gencat</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="getconf">
|
|
<term><command>getconf</command></term>
|
|
<listitem>
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<para>Displays the system configuration values for file system
|
|
specific variables</para>
|
|
<indexterm zone="ch-system-glibc getconf">
|
|
<primary sortas="b-getconf">getconf</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="getent">
|
|
<term><command>getent</command></term>
|
|
<listitem>
|
|
<para>Gets entries from an administrative database</para>
|
|
<indexterm zone="ch-system-glibc getent">
|
|
<primary sortas="b-getent">getent</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="iconv">
|
|
<term><command>iconv</command></term>
|
|
<listitem>
|
|
<para>Performs character set conversion</para>
|
|
<indexterm zone="ch-system-glibc iconv">
|
|
<primary sortas="b-iconv">iconv</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="iconvconfig">
|
|
<term><command>iconvconfig</command></term>
|
|
<listitem>
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|
<para>Creates fastloading <command>iconv</command> module configuration
|
|
files</para>
|
|
<indexterm zone="ch-system-glibc iconvconfig">
|
|
<primary sortas="b-iconvconfig">iconvconfig</primary>
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|
</indexterm>
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|
</listitem>
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|
</varlistentry>
|
|
|
|
<varlistentry id="ldconfig">
|
|
<term><command>ldconfig</command></term>
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|
<listitem>
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|
<para>Configures the dynamic linker runtime bindings</para>
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|
<indexterm zone="ch-system-glibc ldconfig">
|
|
<primary sortas="b-ldconfig">ldconfig</primary>
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|
</indexterm>
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|
</listitem>
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|
</varlistentry>
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|
|
|
<varlistentry id="ldd">
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|
<term><command>ldd</command></term>
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|
<listitem>
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|
<para>Reports which shared libraries are required
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|
by each given program or shared library</para>
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|
<indexterm zone="ch-system-glibc ldd">
|
|
<primary sortas="b-ldd">ldd</primary>
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|
</indexterm>
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|
</listitem>
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|
</varlistentry>
|
|
|
|
<varlistentry id="lddlibc4">
|
|
<term><command>lddlibc4</command></term>
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|
<listitem>
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|
<para>Assists <command>ldd</command> with object files</para>
|
|
<indexterm zone="ch-system-glibc lddlibc4">
|
|
<primary sortas="b-lddlibc4">lddlibc4</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="locale">
|
|
<term><command>locale</command></term>
|
|
<listitem>
|
|
<para>Prints various information about the current locale</para>
|
|
<indexterm zone="ch-system-glibc locale">
|
|
<primary sortas="b-locale">locale</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="localedef">
|
|
<term><command>localedef</command></term>
|
|
<listitem>
|
|
<para>Compiles locale specifications</para>
|
|
<indexterm zone="ch-system-glibc localedef">
|
|
<primary sortas="b-localedef">localedef</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="makedb">
|
|
<term><command>makedb</command></term>
|
|
<listitem>
|
|
<para>Creates a simple database from textual input</para>
|
|
<indexterm zone="ch-system-glibc makedb">
|
|
<primary sortas="b-makedb">makedb</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="mtrace">
|
|
<term><command>mtrace</command></term>
|
|
<listitem>
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|
<para>Reads and interprets a memory trace file and displays a summary
|
|
in human-readable format</para>
|
|
<indexterm zone="ch-system-glibc mtrace">
|
|
<primary sortas="b-mtrace">mtrace</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="nscd">
|
|
<term><command>nscd</command></term>
|
|
<listitem>
|
|
<para>A daemon that provides a cache for the most common name
|
|
service requests</para>
|
|
<indexterm zone="ch-system-glibc nscd">
|
|
<primary sortas="b-nscd">nscd</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="pcprofiledump">
|
|
<term><command>pcprofiledump</command></term>
|
|
<listitem>
|
|
<para>Dumps information generated by PC profiling</para>
|
|
<indexterm zone="ch-system-glibc pcprofiledump">
|
|
<primary sortas="b-pcprofiledump">pcprofiledump</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="pldd">
|
|
<term><command>pldd</command></term>
|
|
<listitem>
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|
<para>Lists dynamic shared objects used by running processes</para>
|
|
<indexterm zone="ch-system-glibc pldd">
|
|
<primary sortas="b-pldd">pldd</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
<!--
|
|
<varlistentry id="pt_chown">
|
|
<term><command>pt_chown</command></term>
|
|
<listitem>
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|
<para>A helper program for <command>grantpt</command> to set the owner,
|
|
group and access permissions of a slave pseudo terminal</para>
|
|
<indexterm zone="ch-system-glibc pt_chown">
|
|
<primary sortas="b-pt_chown">pt_chown</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
-->
|
|
<varlistentry id="rpcgen">
|
|
<term><command>rpcgen</command></term>
|
|
<listitem>
|
|
<para>Generates C code to implement the Remote Procedure Call (RPC)
|
|
protocol</para>
|
|
<indexterm zone="ch-system-glibc rpcgen">
|
|
<primary sortas="b-rpcgen">rpcgen</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="sln">
|
|
<term><command>sln</command></term>
|
|
<listitem>
|
|
<para>A statically linked <command>ln</command> program</para>
|
|
<indexterm zone="ch-system-glibc sln">
|
|
<primary sortas="b-sln">sln</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="sotruss">
|
|
<term><command>sotruss</command></term>
|
|
<listitem>
|
|
<para>Traces shared library procedure calls of a specified command</para>
|
|
<indexterm zone="ch-system-glibc sotruss">
|
|
<primary sortas="b-sotruss">sotruss</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="sprof">
|
|
<term><command>sprof</command></term>
|
|
<listitem>
|
|
<para>Reads and displays shared object profiling data</para>
|
|
<indexterm zone="ch-system-glibc sprof">
|
|
<primary sortas="b-sprof">sprof</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="tzselect">
|
|
<term><command>tzselect</command></term>
|
|
<listitem>
|
|
<para>Asks the user about the location of the system and reports
|
|
the corresponding time zone description</para>
|
|
<indexterm zone="ch-system-glibc tzselect">
|
|
<primary sortas="b-tzselect">tzselect</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="xtrace">
|
|
<term><command>xtrace</command></term>
|
|
<listitem>
|
|
<para>Traces the execution of a program by printing the currently
|
|
executed function</para>
|
|
<indexterm zone="ch-system-glibc xtrace">
|
|
<primary sortas="b-xtrace">xtrace</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="zdump">
|
|
<term><command>zdump</command></term>
|
|
<listitem>
|
|
<para>The time zone dumper</para>
|
|
<indexterm zone="ch-system-glibc zdump">
|
|
<primary sortas="b-zdump">zdump</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="zic">
|
|
<term><command>zic</command></term>
|
|
<listitem>
|
|
<para>The time zone compiler</para>
|
|
<indexterm zone="ch-system-glibc zic">
|
|
<primary sortas="b-zic">zic</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ld.so">
|
|
<term><filename class="libraryfile">ld.so</filename></term>
|
|
<listitem>
|
|
<para>The helper program for shared library executables</para>
|
|
<indexterm zone="ch-system-glibc ld.so">
|
|
<primary sortas="c-ld.so">ld.so</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libBrokenLocale">
|
|
<term><filename class="libraryfile">libBrokenLocale</filename></term>
|
|
<listitem>
|
|
<para>Used internally by Glibc as a gross hack to get broken programs
|
|
(e.g., some Motif applications) running. See comments in
|
|
<filename>glibc-&glibc-version;/locale/broken_cur_max.c</filename>
|
|
for more information</para>
|
|
<indexterm zone="ch-system-glibc libBrokenLocale">
|
|
<primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libSegFault">
|
|
<term><filename class="libraryfile">libSegFault</filename></term>
|
|
<listitem>
|
|
<para>The segmentation fault signal handler, used by
|
|
<command>catchsegv</command></para>
|
|
<indexterm zone="ch-system-glibc libSegFault">
|
|
<primary sortas="c-libSegFault">libSegFault</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libanl">
|
|
<term><filename class="libraryfile">libanl</filename></term>
|
|
<listitem>
|
|
<para>An asynchronous name lookup library</para>
|
|
<indexterm zone="ch-system-glibc libanl">
|
|
<primary sortas="c-libanl">libanl</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libc">
|
|
<term><filename class="libraryfile">libc</filename></term>
|
|
<listitem>
|
|
<para>The main C library</para>
|
|
<indexterm zone="ch-system-glibc libc">
|
|
<primary sortas="c-libc">libc</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libcidn">
|
|
<term><filename class="libraryfile">libcidn</filename></term>
|
|
<listitem>
|
|
<para>Used internally by Glibc for handling internationalized domain
|
|
names in the <function>getaddrinfo()</function> function</para>
|
|
<indexterm zone="ch-system-glibc libcidn">
|
|
<primary sortas="c-libcidn">libcidn</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libcrypt">
|
|
<term><filename class="libraryfile">libcrypt</filename></term>
|
|
<listitem>
|
|
<para>The cryptography library</para>
|
|
<indexterm zone="ch-system-glibc libcrypt">
|
|
<primary sortas="c-libcrypt">libcrypt</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libdl">
|
|
<term><filename class="libraryfile">libdl</filename></term>
|
|
<listitem>
|
|
<para>The dynamic linking interface library</para>
|
|
<indexterm zone="ch-system-glibc libdl">
|
|
<primary sortas="c-libdl">libdl</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libg">
|
|
<term><filename class="libraryfile">libg</filename></term>
|
|
<listitem>
|
|
<para>Dummy library containing no functions. Previously was a runtime
|
|
library for <command>g++</command></para>
|
|
<indexterm zone="ch-system-glibc libg">
|
|
<primary sortas="c-libg">libg</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libieee">
|
|
<term><filename class="libraryfile">libieee</filename></term>
|
|
<listitem>
|
|
<para>Linking in this module forces error handling rules for math
|
|
functions as defined by the Institute of Electrical and Electronic
|
|
Engineers (IEEE). The default is POSIX.1 error handling</para>
|
|
<indexterm zone="ch-system-glibc libieee">
|
|
<primary sortas="c-libieee">libieee</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libm">
|
|
<term><filename class="libraryfile">libm</filename></term>
|
|
<listitem>
|
|
<para>The mathematical library</para>
|
|
<indexterm zone="ch-system-glibc libm">
|
|
<primary sortas="c-libm">libm</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libmcheck">
|
|
<term><filename class="libraryfile">libmcheck</filename></term>
|
|
<listitem>
|
|
<para>Turns on memory allocation checking when linked to</para>
|
|
<indexterm zone="ch-system-glibc libmcheck">
|
|
<primary sortas="c-libmcheck">libmcheck</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libmemusage">
|
|
<term><filename class="libraryfile">libmemusage</filename></term>
|
|
<listitem>
|
|
<para>Used by <command>memusage</command> to help collect
|
|
information about the memory usage of a program</para>
|
|
<indexterm zone="ch-system-glibc libmemusage">
|
|
<primary sortas="c-libmemusage">libmemusage</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libnsl">
|
|
<term><filename class="libraryfile">libnsl</filename></term>
|
|
<listitem>
|
|
<para>The network services library</para>
|
|
<indexterm zone="ch-system-glibc libnsl">
|
|
<primary sortas="c-libnsl">libnsl</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libnss">
|
|
<term><filename class="libraryfile">libnss</filename></term>
|
|
<listitem>
|
|
<para>The Name Service Switch libraries, containing functions for
|
|
resolving host names, user names, group names, aliases, services,
|
|
protocols, etc.</para>
|
|
<indexterm zone="ch-system-glibc libnss">
|
|
<primary sortas="c-libnss">libnss</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libpcprofile">
|
|
<term><filename class="libraryfile">libpcprofile</filename></term>
|
|
<listitem>
|
|
<para>Contains profiling functions used to track the amount of CPU
|
|
time spent in specific source code lines</para>
|
|
<indexterm zone="ch-system-glibc libpcprofile">
|
|
<primary sortas="c-libpcprofile">libpcprofile</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libpthread">
|
|
<term><filename class="libraryfile">libpthread</filename></term>
|
|
<listitem>
|
|
<para>The POSIX threads library</para>
|
|
<indexterm zone="ch-system-glibc libpthread">
|
|
<primary sortas="c-libpthread">libpthread</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libresolv">
|
|
<term><filename class="libraryfile">libresolv</filename></term>
|
|
<listitem>
|
|
<para>Contains functions for creating, sending, and interpreting
|
|
packets to the Internet domain name servers</para>
|
|
<indexterm zone="ch-system-glibc libresolv">
|
|
<primary sortas="c-libresolv">libresolv</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="librpcsvc">
|
|
<term><filename class="libraryfile">librpcsvc</filename></term>
|
|
<listitem>
|
|
<para>Contains functions providing miscellaneous RPC services</para>
|
|
<indexterm zone="ch-system-glibc librpcsvc">
|
|
<primary sortas="c-librpcsvc">librpcsvc</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="librt">
|
|
<term><filename class="libraryfile">librt</filename></term>
|
|
<listitem>
|
|
<para>Contains functions providing most of the interfaces specified
|
|
by the POSIX.1b Realtime Extension</para>
|
|
<indexterm zone="ch-system-glibc librt">
|
|
<primary sortas="c-librt">librt</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libthread_db">
|
|
<term><filename class="libraryfile">libthread_db</filename></term>
|
|
<listitem>
|
|
<para>Contains functions useful for building debuggers for
|
|
multi-threaded programs</para>
|
|
<indexterm zone="ch-system-glibc libthread_db">
|
|
<primary sortas="c-libthread_db">libthread_db</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libutil">
|
|
<term><filename class="libraryfile">libutil</filename></term>
|
|
<listitem>
|
|
<para>Contains code for <quote>standard</quote> functions used in
|
|
many different Unix utilities</para>
|
|
<indexterm zone="ch-system-glibc libutil">
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|
<primary sortas="c-libutil">libutil</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
</sect2>
|
|
|
|
</sect1>
|