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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3784 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
664 lines
24 KiB
XML
664 lines
24 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/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" xreflabel="Glibc" role="wrap">
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<title>Glibc-&glibc-version;</title>
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<?dbhtml filename="glibc.html"?>
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<indexterm zone="ch-system-glibc"><primary sortas="a-Glibc">Glibc</primary></indexterm>
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<sect2 role="package"><title/>
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<para>The Glibc package contains the main C library. This library provides all
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the basic routines for allocating memory, searching directories, opening and
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closing files, reading and writing them, 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><seg>12.3 SBU</seg><seg>784 MB</seg></seglistitem>
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</segmentedlist>
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<segmentedlist>
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<segtitle>Glibc installation depends on</segtitle>
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<seglistitem><seg>Bash, Binutils, Coreutils, Diffutils,
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Gawk, GCC, Gettext, Grep, Make, Perl, Sed, Texinfo</seg></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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<para>The Glibc build system is very well self-contained and will install
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perfectly, even though our compiler specs file and linker are still pointing
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at <filename class="directory">/tools</filename>. We cannot adjust the specs and linker before
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the Glibc install, because the Glibc autoconf tests would then give bogus
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results and thus defeat our goal of achieving a clean build.</para>
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<para>Before starting to build Glibc, remember to unset any environment
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variables that override the default optimization flags.</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>mkdir ../glibc-build
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cd ../glibc-build</userinput></screen>
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<para>Now prepare Glibc for compilation:</para>
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<screen><userinput>../glibc-&glibc-version;/configure --prefix=/usr \
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--disable-profile --enable-add-ons=nptl --with-tls \
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--libexecdir=/tmp/pt_chown --without-cvs \
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--with-headers=/tools/glibc-kernheaders</userinput></screen>
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<para>The meaning of the new configure options:</para>
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<variablelist>
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<varlistentry>
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<term><parameter>--libexecdir=/tmp/pt_chown</parameter></term>
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<listitem><para>This changes
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the location of the <command>pt_chown</command> program from its default of
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<filename class="directory">/usr/libexec</filename> to
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<filename class="directory">/tmp/pt_chown</filename>. This program isn't required
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on modern systems, so we install it in a place from which we will delete it
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later.</para></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>make</userinput></screen>
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<important><para>The test suite for Glibc in this section is considered
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<emphasis>critical</emphasis>. Our advice is to not skip it under any
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circumstance.</para></important>
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<para>Test the results:</para>
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<screen><userinput>make check</userinput></screen>
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<para>The test suite notes from <xref linkend="ch-tools-glibc"/> are still very much
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appropriate here. Be sure to refer back there should you have any doubts.</para>
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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>. Fix this
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annoying little warning with:</para>
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<screen><userinput>touch /etc/ld.so.conf</userinput></screen>
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<para>And install the package:</para>
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<screen><userinput>make install</userinput></screen>
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<para>The locales that can make your system respond in a different language
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weren't installed by the above command. Do it with this:</para>
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<screen><userinput>make localedata/install-locales</userinput></screen>
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<para>An alternative to running the previous command is to install only those
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locales which you need or want. This can be achieved by using the
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<command>localedef</command> command. Information on this can be found in
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the <filename>INSTALL</filename> file in the Glibc source. However, there are
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a number of locales that are essential for the tests of future packages to
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pass, in particular, the <emphasis>libstdc++</emphasis> tests from GCC. The
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following instructions, instead of the install-locales target above, will
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install the minimum set of locales necessary for the tests to run
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successfully:</para>
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<screen><userinput>mkdir -p /usr/lib/locale
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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 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 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 it_IT -f ISO-8859-1 it_IT
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localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen>
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<para>In fact, some locales installed by the
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<command>make localedata/install-locales</command>
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command above are not properly
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supported by some applications that are in LFS and BLFS books. Because
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of various problems that arise
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due to application programmers making
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assumptions that break in such locales, LFS <emphasis>should not</emphasis>
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be used in locales that utilize
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multibyte character sets (including UTF-8) or
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right-to-left writing order.
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Numerous unofficial and unstable patches are required to fix these problems,
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and it has been decided not to support such complex locales.
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This applies to the ja_JP and fa_IR locales as well:
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they have been installed only
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for GCC and Gettext tests to pass, and e.g.
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the <command>watch</command> program (part of Procps)
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compiled according to this book doesn't work properly in them.
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Various attempts to circumvent these
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restrictions are documented in internationalization-related hints.</para>
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<para>Finally, build the linuxthreads man pages, which are a great reference
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on the threading API (applicable to NPTL as well):</para>
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<screen><userinput>make -C ../glibc-&glibc-version;/linuxthreads/man</userinput></screen>
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<para>And install these pages:</para>
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<screen><userinput>make -C ../glibc-&glibc-version;/linuxthreads/man install</userinput></screen>
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</sect2>
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<sect2 id="conf-glibc" role="configuration"><title>Configuring Glibc</title>
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<indexterm zone="conf-glibc"><primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary></indexterm>
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<indexterm zone="conf-glibc"><primary sortas="e-/etc/localtime">/etc/localtime</primary></indexterm>
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<para>We need to create the <filename>/etc/nsswitch.conf</filename> file,
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because, although Glibc provides defaults when this file is missing or corrupt,
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the Glibc defaults don't work well with networking. Also, our time zone needs
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to be set up.</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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# 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
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EOF</userinput></screen>
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<para>To find out what time zone you're in, run the following script:</para>
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<screen><userinput>tzselect</userinput></screen>
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<para>When you've answered a few questions about your location, the script will
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output the name of your time zone, something like <emphasis>EST5EDT</emphasis>
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or <emphasis>Canada/Eastern</emphasis>. Then create the
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<filename>/etc/localtime</filename> file by running:</para>
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<screen><userinput>cp --remove-destination /usr/share/zoneinfo/Canada/Eastern /etc/localtime</userinput></screen>
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<para>The meaning of the option:</para>
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<variablelist>
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<varlistentry>
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<term><parameter>--remove-destination</parameter></term>
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<listitem><para>This is needed to force removal of the already existing symbolic
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link. The reason why we copy instead of symlink is to cover the situation where
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<filename class="directory">/usr</filename> is on a separate partition. This could matter, for
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example, when booted into single user mode.</para></listitem>
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</varlistentry>
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</variablelist>
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<para>Of course, instead of <emphasis>Canada/Eastern</emphasis>, fill in
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the name of the time zone that the <command>tzselect</command> script
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gave you.</para>
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</sect2>
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<sect2 id="conf-ld" role="configuration">
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<title>Configuring Dynamic Loader</title>
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<indexterm zone="conf-ld"><primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary></indexterm>
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<para>By default, the dynamic loader
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(<filename class="libraryfile">/lib/ld-linux.so.2</filename>) searches through <filename
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class="directory">/lib</filename> and <filename class="directory">/usr/lib</filename>
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for dynamic libraries that are needed
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by programs when you run them. 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>, you need to add them to
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the <filename>/etc/ld.so.conf</filename> file for the dynamic
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loader to find them. Two directories that are commonly known to contain
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additional libraries are <filename class="directory">/usr/local/lib</filename>
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and <filename class="directory">/opt/lib</filename>, so we 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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# Begin /etc/ld.so.conf
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/usr/local/lib
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/opt/lib
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# End /etc/ld.so.conf
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EOF</userinput></screen>
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</sect2>
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<sect2 id="contents-glibc" role="content"><title>Contents of Glibc</title>
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<segmentedlist>
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<segtitle>Installed programs</segtitle>
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<segtitle>Installed libraries</segtitle>
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<seglistitem><seg>catchsegv, gencat, getconf,
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getent, glibcbug, iconv, iconvconfig, ldconfig, ldd, lddlibc4, locale,
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localedef, mtrace, nscd, nscd_nischeck, pcprofiledump, pt_chown, rpcgen,
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rpcinfo, sln, sprof, tzselect, xtrace, zdump and zic</seg>
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<seg>ld.so, libBrokenLocale.[a,so],
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libSegFault.so, libanl.[a,so], libbsd-compat.a, libc.[a,so], libc_nonshared.a,
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libcrypt.[a,so], libdl.[a,so], libg.a, libieee.a, libm.[a,so], libmcheck.a,
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libmemusage.so, libnsl.a, libnss_compat.so, libnss_dns.so, libnss_files.so,
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libnss_hesiod.so, libnss_nis.so, libnss_nisplus.so, libpcprofile.so,
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libpthread.[a,so], libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so
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and libutil.[a,so]</seg></seglistitem>
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</segmentedlist>
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<variablelist><title>Short descriptions</title>
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<varlistentry id="catchsegv">
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<term><command>catchsegv</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc catchsegv"><primary sortas="b-catchsegv">catchsegv</primary></indexterm>
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<para>can be used to create a stack trace
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when a program terminates with a segmentation fault.</para>
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</listitem>
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</varlistentry>
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<varlistentry id="gencat">
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<term><command>gencat</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc gencat"><primary sortas="b-gencat">gencat</primary></indexterm>
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<para>generates message catalogues.</para>
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</listitem>
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</varlistentry>
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<varlistentry id="getconf">
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<term><command>getconf</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc getconf"><primary sortas="b-getconf">getconf</primary></indexterm>
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<para>displays the system configuration values for file system specific variables.</para>
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</listitem>
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</varlistentry>
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<varlistentry id="getent">
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<term><command>getent</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc getent"><primary sortas="b-getent">getent</primary></indexterm>
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<para>gets entries from an administrative database.</para>
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</listitem>
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</varlistentry>
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<varlistentry id="glibcbug">
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<term><command>glibcbug</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc glibcbug"><primary sortas="b-glibcbug">glibcbug</primary></indexterm>
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<para>creates a bug report and mails it to the bug email address.</para>
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</listitem>
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</varlistentry>
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<varlistentry id="iconv">
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<term><command>iconv</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc iconv"><primary sortas="b-iconv">iconv</primary></indexterm>
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<para>performs character set conversion.</para>
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</listitem>
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</varlistentry>
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<varlistentry id="iconvconfig">
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<term><command>iconvconfig</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc iconvconfig"><primary sortas="b-iconvconfig">iconvconfig</primary></indexterm>
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<para>creates fastloading <command>iconv</command> module configuration file.</para>
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</listitem>
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</varlistentry>
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<varlistentry id="ldconfig">
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<term><command>ldconfig</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc ldconfig"><primary sortas="b-ldconfig">ldconfig</primary></indexterm>
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<para>configures the dynamic linker runtime bindings.</para>
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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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<indexterm zone="ch-system-glibc ldd"><primary sortas="b-ldd">ldd</primary></indexterm>
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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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</listitem>
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</varlistentry>
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<varlistentry id="lddlibc4">
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<term><command>lddlibc4</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc lddlibc4"><primary sortas="b-lddlibc4">lddlibc4</primary></indexterm>
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<para>assists <command>ldd</command> with object files.</para>
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</listitem>
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</varlistentry>
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<varlistentry id="locale">
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<term><command>locale</command></term>
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<listitem>
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<indexterm zone="ch-system-glibc locale"><primary sortas="b-locale">locale</primary></indexterm>
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<para>is a Perl program that tells the compiler
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to enable or disable the use of POSIX locales for built-in operations.</para>
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</listitem>
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</varlistentry>
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<varlistentry id="localedef">
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<term><command>localedef</command></term>
|
|
<listitem>
|
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<indexterm zone="ch-system-glibc localedef"><primary sortas="b-localedef">localedef</primary></indexterm>
|
|
<para>compiles locale specifications.</para>
|
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</listitem>
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</varlistentry>
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<varlistentry id="mtrace">
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<term><command>mtrace</command></term>
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<listitem>
|
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<indexterm zone="ch-system-glibc mtrace"><primary sortas="b-mtrace">mtrace</primary></indexterm>
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<para>...</para>
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</listitem>
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</varlistentry>
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|
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<varlistentry id="nscd">
|
|
<term><command>nscd</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc nscd"><primary sortas="b-nscd">nscd</primary></indexterm>
|
|
<para>is a name service cache daemon providing a
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cache for the most common name service requests.</para>
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</listitem>
|
|
</varlistentry>
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|
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<varlistentry id="nscd_nischeck">
|
|
<term><command>nscd_nischeck</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc nscd_nischeck"><primary sortas="b-nscd_nischeck">nscd_nischeck</primary></indexterm>
|
|
<para>checks whether or not secure mode is necessary for NIS+ lookup.</para>
|
|
</listitem>
|
|
</varlistentry>
|
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|
|
<varlistentry id="pcprofiledump">
|
|
<term><command>pcprofiledump</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc pcprofiledump"><primary sortas="b-pcprofiledump">pcprofiledump</primary></indexterm>
|
|
<para>dumps information generated by PC profiling.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="pt_chown">
|
|
<term><command>pt_chown</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc pt_chown"><primary sortas="b-pt_chown">pt_chown</primary></indexterm>
|
|
<para>is a helper program for grantpt to set
|
|
the owner, group and access permissions of a slave pseudo terminal.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="rpcgen">
|
|
<term><command>rpcgen</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc rpcgen"><primary sortas="b-rpcgen">rpcgen</primary></indexterm>
|
|
<para>generates C code to implement the RPC protocol.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="rpcinfo">
|
|
<term><command>rpcinfo</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc rpcinfo"><primary sortas="b-rpcinfo">rpcinfo</primary></indexterm>
|
|
<para>makes an RPC call to an RPC server.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="sln">
|
|
<term><command>sln</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc sln"><primary sortas="b-sln">sln</primary></indexterm>
|
|
<para>is used to make symbolic links. The program
|
|
is statically linked, so it is useful for making symbolic links to dynamic
|
|
libraries if the dynamic linking system for some reason is nonfunctional.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="sprof">
|
|
<term><command>sprof</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc sprof"><primary sortas="b-sprof">sprof</primary></indexterm>
|
|
<para>reads and displays shared object profiling data.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="tzselect">
|
|
<term><command>tzselect</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc tzselect"><primary sortas="b-tzselect">tzselect</primary></indexterm>
|
|
<para>asks the user about the location of the
|
|
system and reports the corresponding time zone description.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="xtrace">
|
|
<term><command>xtrace</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc xtrace"><primary sortas="b-xtrace">xtrace</primary></indexterm>
|
|
<para>traces the execution of a program by
|
|
printing the currently executed function.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="zdump">
|
|
<term><command>zdump</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc zdump"><primary sortas="b-zdump">zdump</primary></indexterm>
|
|
<para>is the time zone dumper.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="zic">
|
|
<term><command>zic</command></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc zic"><primary sortas="b-zic">zic</primary></indexterm>
|
|
<para>is the time zone compiler.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ld.so">
|
|
<term><filename class="libraryfile">ld.so</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc ld.so"><primary sortas="c-ld.so">ld.so</primary></indexterm>
|
|
<para>is the helper program for shared library executables.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libBrokenLocale">
|
|
<term><filename class="libraryfile">libBrokenLocale</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libBrokenLocale"><primary sortas="c-libBrokenLocale">libBrokenLocale</primary></indexterm>
|
|
<para>is used by programs, such as Mozilla, to solve broken locales.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libSegFault">
|
|
<term><filename class="libraryfile">libSegFault</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libSegFault"><primary sortas="c-libSegFault">libSegFault</primary></indexterm>
|
|
<para>is a segmentation fault signal handler. It tries to catch segfaults.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libanl">
|
|
<term><filename class="libraryfile">libanl</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libanl"><primary sortas="c-libanl">libanl</primary></indexterm>
|
|
<para>is an asynchronous name lookup library.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libbsd-compat">
|
|
<term><filename class="libraryfile">libbsd-compat</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libbsd-compat"><primary sortas="c-libbsd-compat">libbsd-compat</primary></indexterm>
|
|
<para>provides the portability needed
|
|
in order to run certain BSD programs under Linux.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libc">
|
|
<term><filename class="libraryfile">libc</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libc"><primary sortas="c-libc">libc</primary></indexterm>
|
|
<para>is the main C library -- a collection of commonly used functions.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libcrypt">
|
|
<term><filename class="libraryfile">libcrypt</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libcrypt"><primary sortas="c-libcrypt">libcrypt</primary></indexterm>
|
|
<para>is the cryptography library.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libdl">
|
|
<term><filename class="libraryfile">libdl</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libdl"><primary sortas="c-libdl">libdl</primary></indexterm>
|
|
<para>is the dynamic linking interface library.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libg">
|
|
<term><filename class="libraryfile">libg</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libg"><primary sortas="c-libg">libg</primary></indexterm>
|
|
<para>is a runtime library for <command>g++</command>.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libieee">
|
|
<term><filename class="libraryfile">libieee</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libieee"><primary sortas="c-libieee">libieee</primary></indexterm>
|
|
<para>is the IEEE floating point library.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libm">
|
|
<term><filename class="libraryfile">libm</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libm"><primary sortas="c-libm">libm</primary></indexterm>
|
|
<para>is the mathematical library.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libmcheck">
|
|
<term><filename class="libraryfile">libmcheck</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libmcheck"><primary sortas="c-libmcheck">libmcheck</primary></indexterm>
|
|
<para>contains code run at boot.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libmemusage">
|
|
<term><filename class="libraryfile">libmemusage</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libmemusage"><primary sortas="c-libmemusage">libmemusage</primary></indexterm>
|
|
<para>is used by <command>memusage</command> to help collect
|
|
information about the memory usage of a program.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libnsl">
|
|
<term><filename class="libraryfile">libnsl</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libnsl"><primary sortas="c-libnsl">libnsl</primary></indexterm>
|
|
<para>is the network services library.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libnss">
|
|
<term><filename class="libraryfile">libnss*</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libnss"><primary sortas="c-libnss*">libnss*</primary></indexterm>
|
|
<para>are the Name Service Switch libraries,
|
|
containing functions for resolving host names, user names, group names,
|
|
aliases, services, protocols, and the like.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libpcprofile">
|
|
<term><filename class="libraryfile">libpcprofile</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libpcprofile"><primary sortas="c-libpcprofile">libpcprofile</primary></indexterm>
|
|
<para>contains profiling functions used
|
|
to track the amount of CPU time spent in which source code lines.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libpthread">
|
|
<term><filename class="libraryfile">libpthread</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libpthread"><primary sortas="c-libpthread">libpthread</primary></indexterm>
|
|
<para>is the POSIX threads library.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libresolv">
|
|
<term><filename class="libraryfile">libresolv</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libresolv"><primary sortas="c-libresolv">libresolv</primary></indexterm>
|
|
<para>contains functions for creating,
|
|
sending, and interpreting packets to the Internet domain name servers.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="librpcsvc">
|
|
<term><filename class="libraryfile">librpcsvc</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc librpcsvc"><primary sortas="c-librpcsvc">librpcsvc</primary></indexterm>
|
|
<para>contains functions providing miscellaneous RPC services.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="librt">
|
|
<term><filename class="libraryfile">librt</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc librt"><primary sortas="c-librt">librt</primary></indexterm>
|
|
<para>contains functions providing most of the
|
|
interfaces specified by the POSIX.1b Realtime Extension.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libthread_db">
|
|
<term><filename class="libraryfile">libthread_db</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libthread_db"><primary sortas="c-libthread_db">libthread_db</primary></indexterm>
|
|
<para>contains functions useful for
|
|
building debuggers for multi-threaded programs.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libutil">
|
|
<term><filename class="libraryfile">libutil</filename></term>
|
|
<listitem>
|
|
<indexterm zone="ch-system-glibc libutil"><primary sortas="c-libutil">libutil</primary></indexterm>
|
|
<para>contains code for <quote>standard</quote> functions used in many different Unix utilities.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
|
|
</sect2>
|
|
|
|
</sect1>
|