| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 |   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 |   <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 |   %general-entities;
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| 6 | ]>
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| 7 | 
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| 8 | <sect1 id="ch-system-eglibc" role="wrap">
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| 9 |   <?dbhtml filename="eglibc.html"?>
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| 10 | 
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| 11 |   <title>EGLIBC-&eglibc-version;</title>
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| 12 | 
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| 13 |   <indexterm zone="ch-system-eglibc">
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| 14 |     <primary sortas="a-EGLIBC">EGLIBC</primary>
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| 15 |   </indexterm>
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| 16 | 
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| 17 |   <sect2 role="package">
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| 18 |     <title/>
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| 19 | 
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| 20 |     <para>The EGLIBC package contains the main C library. This library provides
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| 21 |     the basic routines for allocating memory, searching directories, opening and
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| 22 |     closing files, reading and writing files, string handling, pattern matching,
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| 23 |     arithmetic, and so on.</para>
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| 24 | 
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| 25 |   </sect2>
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| 26 | 
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| 27 |   <sect2 role="installation">
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| 28 |     <title>Installation of EGLIBC</title>
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| 29 | 
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| 30 |     <note os="z">
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| 31 |       <para>Some packages outside of CLFS suggest installing GNU libiconv in
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| 32 |       order to translate data from one encoding to another. The project's
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| 33 |       home page (<ulink url="http://www.gnu.org/software/libiconv/"/>) says
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| 34 |       <quote>This library provides an <function>iconv()</function>
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| 35 |       implementation, for use on systems which don't have one, or whose
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| 36 |       implementation cannot convert from/to Unicode.</quote> EGLIBC provides
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| 37 |       an <function>iconv()</function> implementation and can convert from/to
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| 38 |       Unicode, therefore libiconv is not required on a CLFS system.</para>
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| 39 |     </note>
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| 40 | 
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| 41 |     <para os="l1">At the end of the installation, the build system will run
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| 42 |     a sanity test to make sure everything installed properly. This script will
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| 43 |     attempt to test for a library that is only used in the test suite and is
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| 44 |     never installed. Prevent the script from testing for this library with the
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| 45 |     following command:</para>
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| 46 | 
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| 47 | <screen os="l2"><userinput>sed -i 's/\(&& $name ne\) "db1"/ & \1 "nss_test1"/' scripts/test-installation.pl</userinput></screen>
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| 48 | 
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| 49 |     <para os="l3">This same script performs its tests by attempting to compile
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| 50 |     test programs against certain libraries. However it does not specify the
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| 51 |     ld.so, and our toolchain is still configured to use the one in /tools. The
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| 52 |     following set of commands will force the script to use the complete path
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| 53 |     of the new ld.so that was just installed:</para>
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| 54 | 
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| 55 | <screen os="l4"><userinput>LINKER=$(readelf -l /tools/bin/bash | sed -n 's@.*interpret.*/tools\(.*\)]$@\1@p')
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| 56 | sed -i "s|libs -o|libs -L/usr/lib -Wl,-dynamic-linker=${LINKER} -o|" \
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| 57 |   scripts/test-installation.pl
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| 58 | unset LINKER</userinput></screen>
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| 59 | 
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| 60 |     <para os="p3">The following patch fixes an issue that can cause
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| 61 |       ALSA to crash:</para>
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| 62 |       
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| 63 | <screen os="p4"><userinput>patch -Np1 -i ../&eglibc-fixes-patch;</userinput></screen>
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| 64 | 
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| 65 |     <para os="b">The EGLIBC build system is self-contained and will install
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| 66 |     perfectly, even though the compiler specs file and linker are still
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| 67 |     pointing at <filename class="directory">/tools</filename>. The specs
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| 68 |     and linker cannot be adjusted before the EGLIBC install because the
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| 69 |     EGLIBC Autoconf tests would give false results and defeat the goal
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| 70 |     of achieving a clean build.</para>
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| 71 | 
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| 72 |     <para os="e">The EGLIBC documentation recommends building EGLIBC outside of the
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| 73 |     source directory in a dedicated build directory:</para>
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| 74 | 
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| 75 | <screen os="f"><userinput>mkdir -v ../eglibc-build
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| 76 | cd ../eglibc-build</userinput></screen>
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| 77 | 
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| 78 |     <para os="g">Prepare EGLIBC for compilation:</para>
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| 79 | 
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| 80 | <screen os="h"><userinput>../eglibc-&eglibc-version;/configure --prefix=/usr \
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| 81 |     --disable-profile --enable-add-ons --enable-kernel=2.6.32 \
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| 82 |     --libexecdir=/usr/lib/eglibc</userinput></screen>
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| 83 | 
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| 84 |     <variablelist os="i">
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| 85 |       <title>The meaning of the new configure option:</title>
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| 86 | 
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| 87 |       <varlistentry>
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| 88 |         <term><parameter>--libexecdir=/usr/lib/eglibc</parameter></term>
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| 89 |         <listitem>
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| 90 |           <para>This changes the location of the <command>pt_chown</command>
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| 91 |           program from its default of <filename
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| 92 |           class="directory">/usr/libexec</filename> to <filename
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| 93 |           class="directory">/usr/lib/eglibc</filename>.</para>
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| 94 |         </listitem>
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| 95 |       </varlistentry>
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| 96 |     </variablelist>
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| 97 | 
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| 98 |     <para os="j">Compile the package:</para>
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| 99 | 
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| 100 | <screen os="k"><userinput>make</userinput></screen>
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| 101 | 
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| 102 |     <important os="l">
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| 103 |       <para>The test suite for EGLIBC is considered critical.
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| 104 |       Do not skip it under any circumstance.</para>
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| 105 |     </important>
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| 106 | 
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| 107 |     <para os="m">Before running the tests, copy a file from the source tree into our
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| 108 |     build tree to prevent a couple of test failures, then run the tests:</para>
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| 109 | 
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| 110 | <!-- items n,o,p no longer the master, use x86_64 which has no failures -->
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| 111 | 
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| 112 | <screen os="n"><userinput>cp -v ../eglibc-&eglibc-version;/iconvdata/gconv-modules iconvdata
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| 113 | make -k check 2>&1 | tee eglibc-check-log; grep Error eglibc-check-log</userinput></screen>
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| 114 | 
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| 115 |     <para os="o">The EGLIBC test suite is highly dependent on certain functions of
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| 116 |     the host system, in particular the kernel. The posix/annexc test normally fails
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| 117 |     and you should see <literal>Error 1 (ignored)</literal> in the output. Apart
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| 118 |     from this, the EGLIBC test suite is always expected to pass. However, in certain
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| 119 |     circumstances, some failures are unavoidable. If a test fails because of a missing
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| 120 |     program (or missing symbolic link), or a segfault, you will see an error code
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| 121 |     greater than 127 and the details will be in the log. More commonly, tests will
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| 122 |     fail with <literal>Error 2</literal> - for these, the contents of the corresponding
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| 123 |     <filename>.out</filename> file, e.g. <filename>posix/annexc.out</filename> may be
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| 124 |     informative. Here is a list of the most common issues:</para>
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| 125 | 
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| 126 |     <itemizedlist os="p">
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| 127 |       <listitem>
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| 128 |         <para>The <emphasis>math</emphasis> tests sometimes fail.
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| 129 |         Certain optimization settings are known to be a
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| 130 |         factor here.</para>
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| 131 |       </listitem>
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| 132 |       <listitem>
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| 133 |         <para>If you have mounted the CLFS partition with the
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| 134 |         <parameter>noatime</parameter> option, the <emphasis>atime</emphasis> test
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| 135 |         will fail. As mentioned in <xref linkend="ch-partitioning-mounting"/>,
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| 136 |         do not use the <parameter>noatime</parameter> option while building
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| 137 |         CLFS.</para>
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| 138 |       </listitem>
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| 139 |       <listitem>
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| 140 |         <para>When running on older and slower hardware, some tests
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| 141 |         can fail because of test timeouts being exceeded.</para>
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| 142 |       </listitem>
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| 143 |     </itemizedlist>
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| 144 | 
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| 145 |     <para os="q">Though it is a harmless message, the install stage of EGLIBC will
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| 146 |     complain about the absence of <filename>/etc/ld.so.conf</filename>.
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| 147 |     Prevent this warning with:</para>
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| 148 | 
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| 149 | <screen os="r"><userinput>touch /etc/ld.so.conf</userinput></screen>
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| 150 | 
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| 151 |     <para os="s">Install the package:</para>
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| 152 | 
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| 153 | <screen os="t"><userinput>make install</userinput></screen>
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| 154 | 
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| 155 |     <para os="ra">Install NIS and RPC related headers that are not installed by default.</para>
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| 156 | 
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| 157 | <screen os="rb"><userinput>cp -v ../eglibc-&eglibc-version;/sunrpc/rpc/*.h /usr/include/rpc
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| 158 | cp -v ../eglibc-&eglibc-version;/sunrpc/rpcsvc/*.h /usr/include/rpcsvc
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| 159 | cp -v ../eglibc-&eglibc-version;/nis/rpcsvc/*.h /usr/include/rpcsvc</userinput></screen>
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| 160 | 
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| 161 |   </sect2>
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| 162 | 
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| 163 |   <sect2 id="i18n-eglibc" role="configuration">
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| 164 |     <title>Internationalization</title>
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| 165 | 
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| 166 |     <para>The locales that can make the system respond in a different
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| 167 |     language were not installed by the above command. Install them
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| 168 |     with:</para>
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| 169 | 
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| 170 | <screen><userinput>make localedata/install-locales</userinput></screen>
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| 171 | 
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| 172 |     <para>To save time, an alternative to running the previous command (which
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| 173 |     generates and installs every locale listed in the
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| 174 |     <filename>eglibc-&eglibc-version;/localedata/SUPPORTED</filename> file) is
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| 175 |     to install only those locales that are wanted and needed. This can be
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| 176 |     achieved by using the <command>localedef</command> command. Information on
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| 177 |     this command is located in the <filename>INSTALL</filename> file in the
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| 178 |     EGLIBC source. However, there are a number of locales that are essential in
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| 179 |     order for the tests of future packages to pass, in particular, the
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| 180 |     <emphasis>libstdc++</emphasis> tests from GCC. The following instructions,
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| 181 |     instead of the <parameter>install-locales</parameter> target used above,
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| 182 |     will install the minimum set of locales necessary for the tests to run
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| 183 |     successfully:</para>
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| 184 | 
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| 185 | <screen role="nodump"><userinput>mkdir -pv /usr/lib/locale
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| 186 | localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
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| 187 | localedef -i de_DE -f ISO-8859-1 de_DE
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| 188 | localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
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| 189 | localedef -i en_HK -f ISO-8859-1 en_HK
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| 190 | localedef -i en_PH -f ISO-8859-1 en_PH
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| 191 | localedef -i en_US -f ISO-8859-1 en_US
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| 192 | localedef -i es_MX -f ISO-8859-1 es_MX
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| 193 | localedef -i fa_IR -f UTF-8 fa_IR
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| 194 | localedef -i fr_FR -f ISO-8859-1 fr_FR
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| 195 | localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
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| 196 | localedef -i it_IT -f ISO-8859-1 it_IT
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| 197 | localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen>
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| 198 | 
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| 199 |     <para>Some locales installed by the <command>make
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| 200 |     localedata/install-locales</command> command above are not properly
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| 201 |     supported by some applications that are in CLFS and CBLFS. Because
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| 202 |     of the various problems that arise due to application programmers making
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| 203 |     assumptions that break in such locales, CLFS should not be used in locales
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| 204 |     that utilize multibyte character sets (including UTF-8) or right-to-left
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| 205 |     writing order.  Numerous unofficial and unstable patches are required to
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| 206 |     fix these problems, and it has been decided by the CLFS developers not to
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| 207 |     support such complex locales at this time. This applies to the ja_JP and
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| 208 |     fa_IR locales as well—they have been installed only for GCC and
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| 209 |     Gettext tests to pass, and the <command>watch</command> program (part of
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| 210 |     the Procps package) does not work properly in them. Various attempts to
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| 211 |     circumvent these restrictions are documented in internationalization-related
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| 212 |     hints.</para>
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| 213 | 
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| 214 |   </sect2>
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| 215 | 
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| 216 |   <sect2 id="conf-eglibc" role="configuration">
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| 217 |     <title>Configuring EGLIBC</title>
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| 218 | 
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| 219 |     <indexterm zone="conf-eglibc">
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| 220 |       <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
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| 221 |     </indexterm>
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| 222 | 
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| 223 |     <indexterm zone="conf-eglibc">
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| 224 |       <primary sortas="e-/etc/localtime">/etc/localtime</primary>
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| 225 |     </indexterm>
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| 226 | 
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| 227 |     <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
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| 228 |     because, although EGLIBC provides defaults when this file is missing or
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| 229 |     corrupt, the EGLIBC defaults do not work well in a networked environment.
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| 230 |     The time zone also needs to be configured.</para>
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| 231 | 
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| 232 |     <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running
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| 233 |     the following:</para>
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| 234 | 
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| 235 | <screen><userinput>cat > /etc/nsswitch.conf << "EOF"
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| 236 | <literal># Begin /etc/nsswitch.conf
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| 237 | 
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| 238 | passwd: files
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| 239 | group: files
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| 240 | shadow: files
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| 241 | 
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| 242 | hosts: files dns
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| 243 | networks: files
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| 244 | 
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| 245 | protocols: files
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| 246 | services: files
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| 247 | ethers: files
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| 248 | rpc: files
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| 249 | 
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| 250 | # End /etc/nsswitch.conf</literal>
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| 251 | EOF</userinput></screen>
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| 252 | 
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| 253 |     <para>To determine the local time zone, run the following script:</para>
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| 254 | 
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| 255 | <screen role="nodump"><userinput>tzselect</userinput></screen>
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| 256 | 
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| 257 |     <para>After answering a few questions about the location, the script will
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| 258 |     output the name of the time zone (e.g., <emphasis>EST5EDT</emphasis> or
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| 259 |     <emphasis>Canada/Eastern</emphasis>). Then create the
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| 260 |     <filename>/etc/localtime</filename> file by running:</para>
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| 261 | 
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| 262 | <screen><userinput>cp -v --remove-destination /usr/share/zoneinfo/<replaceable>[xxx]</replaceable> \
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| 263 |     /etc/localtime</userinput></screen>
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| 264 | 
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| 265 |     <para>Replace <replaceable>[xxx]</replaceable> with the name of the time zone
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| 266 |     that <command>tzselect</command> provided (e.g., Canada/Eastern).</para>
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| 267 | 
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| 268 |     <variablelist>
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| 269 |       <title>The meaning of the cp option:</title>
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| 270 | 
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| 271 |       <varlistentry>
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| 272 |         <term><parameter>--remove-destination</parameter></term>
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| 273 |         <listitem>
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| 274 |           <para>This is needed to force removal of the already existing symbolic
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| 275 |           link. The reason for copying the file instead of using a symlink is to
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| 276 |           cover the situation where <filename class="directory">/usr</filename>
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| 277 |           is on a separate partition. This could be important when booted into
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| 278 |           single user mode.</para>
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| 279 |         </listitem>
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| 280 |       </varlistentry>
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| 281 |     </variablelist>
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| 282 | 
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| 283 |   </sect2>
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| 284 | 
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| 285 |   <sect2 id="conf-ld" role="configuration">
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| 286 |     <title>Configuring The Dynamic Loader</title>
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| 287 | 
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| 288 |     <indexterm zone="conf-ld">
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| 289 |       <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
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| 290 |     </indexterm>
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| 291 | 
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| 292 |     <para os="ld-a">By default, the dynamic loader (<filename
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| 293 |     class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
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| 294 |     <filename class="directory">/lib</filename> and <filename
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| 295 |     class="directory">/usr/lib</filename> for dynamic libraries that are
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| 296 |     needed by programs as they are run. However, if there are libraries in
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| 297 |     directories other than <filename class="directory">/lib</filename> and
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| 298 |     <filename class="directory">/usr/lib</filename>, these need to be
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| 299 |     added to the <filename>/etc/ld.so.conf</filename> file in order
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| 300 |     for the dynamic loader to find them. Two directories that are commonly
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| 301 |     known to contain additional libraries are <filename
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| 302 |     class="directory">/usr/local/lib</filename> and <filename
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| 303 |     class="directory">/opt/lib</filename>, so add those directories to the
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| 304 |     dynamic loader's search path.</para>
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| 305 | 
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| 306 |     <para os="ld-b">Create a new file <filename>/etc/ld.so.conf</filename> by running the
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| 307 |     following:</para>
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| 308 | 
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| 309 | <screen os="ld-c"><userinput>cat > /etc/ld.so.conf << "EOF"
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| 310 | <literal># Begin /etc/ld.so.conf
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| 311 | 
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| 312 | /usr/local/lib
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| 313 | /opt/lib
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| 314 | 
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| 315 | # End /etc/ld.so.conf</literal>
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| 316 | EOF</userinput></screen>
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| 317 | 
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| 318 |   </sect2>
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| 319 | 
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| 320 |   <sect2 id="contents-eglibc" role="content">
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| 321 |     <title>Contents of EGLIBC</title>
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| 322 | 
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| 323 |     <segmentedlist>
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| 324 |       <segtitle>Installed programs</segtitle>
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| 325 |       <segtitle>Installed libraries</segtitle>
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| 326 |       <segtitle>Installed directories</segtitle>
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| 327 | 
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| 328 |       <seglistitem>
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| 329 |         <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
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| 330 |         ldd, lddlibc4, locale, localedef, mtrace, nscd,
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| 331 |         pcprofiledump, pt_chown, rpcgen, rpcinfo, sln, sprof, tzselect, xtrace,
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| 332 |         zdump, and zic</seg>
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| 333 |         <seg>ld.so, libBrokenLocale.[a,so], libSegFault.so, libanl.[a,so],
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| 334 |         libbsd-compat.a, libc.[a,so], libc_nonshared.a, libcidn.[a,so],
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| 335 |         libcrypt.[a,so], libdl.[a,so], libg.a, libieee.a, libm.[a,so],
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| 336 |         libmcheck.a, libmemusage.so, libnsl.a, libnss_compat.so, libnss_dns.so,
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| 337 |         libnss_files.so, libnss_hesiod.so, libnss_nis.so, libnss_nisplus.so,
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| 338 |         libpcprofile.so, libpthread.[a,so], libpthread_nonshared.a,
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| 339 |         libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so, and
 | 
|---|
| 340 |         libutil.[a,so]</seg>
 | 
|---|
| 341 |         <seg>/usr/include/arpa, /usr/include/bits, /usr/include/gnu,
 | 
|---|
| 342 |         /usr/include/net, /usr/include/netash, /usr/include/netatalk,
 | 
|---|
| 343 |         /usr/include/netax25, /usr/include/neteconet, /usr/include/netinet,
 | 
|---|
| 344 |         /usr/include/netipx, /usr/include/netiucv, /usr/include/netpacket,
 | 
|---|
| 345 |         /usr/include/netrom, /usr/include/netrose, /usr/include/nfs,
 | 
|---|
| 346 |         /usr/include/protocols, /usr/include/rpc, /usr/include/rpcsvc,
 | 
|---|
| 347 |         /usr/include/sys, /usr/lib/gconv, /usr/lib/eglibc, /usr/lib/locale,
 | 
|---|
| 348 |         /usr/share/i18n, /usr/share/zoneinfo, /var/cache/ldconfig</seg>
 | 
|---|
| 349 |       </seglistitem>
 | 
|---|
| 350 |     </segmentedlist>
 | 
|---|
| 351 | 
 | 
|---|
| 352 |     <variablelist>
 | 
|---|
| 353 |       <bridgehead renderas="sect3">Short Descriptions</bridgehead>
 | 
|---|
| 354 |       <?dbfo list-presentation="list"?>
 | 
|---|
| 355 |       <?dbhtml list-presentation="table"?>
 | 
|---|
| 356 | 
 | 
|---|
| 357 |       <varlistentry id="catchsegv">
 | 
|---|
| 358 |         <term><command>catchsegv</command></term>
 | 
|---|
| 359 |         <listitem>
 | 
|---|
| 360 |           <para>Can be used to create a stack trace when a program
 | 
|---|
| 361 |           terminates with a segmentation fault</para>
 | 
|---|
| 362 |           <indexterm zone="ch-system-eglibc catchsegv">
 | 
|---|
| 363 |             <primary sortas="b-catchsegv">catchsegv</primary>
 | 
|---|
| 364 |           </indexterm>
 | 
|---|
| 365 |         </listitem>
 | 
|---|
| 366 |       </varlistentry>
 | 
|---|
| 367 | 
 | 
|---|
| 368 |       <varlistentry id="gencat">
 | 
|---|
| 369 |         <term><command>gencat</command></term>
 | 
|---|
| 370 |         <listitem>
 | 
|---|
| 371 |           <para>Generates message catalogues</para>
 | 
|---|
| 372 |           <indexterm zone="ch-system-eglibc gencat">
 | 
|---|
| 373 |             <primary sortas="b-gencat">gencat</primary>
 | 
|---|
| 374 |           </indexterm>
 | 
|---|
| 375 |         </listitem>
 | 
|---|
| 376 |       </varlistentry>
 | 
|---|
| 377 | 
 | 
|---|
| 378 |       <varlistentry id="getconf">
 | 
|---|
| 379 |         <term><command>getconf</command></term>
 | 
|---|
| 380 |         <listitem>
 | 
|---|
| 381 |           <para>Displays the system configuration values for file system specific
 | 
|---|
| 382 |           variables</para>
 | 
|---|
| 383 |           <indexterm zone="ch-system-eglibc getconf">
 | 
|---|
| 384 |             <primary sortas="b-getconf">getconf</primary>
 | 
|---|
| 385 |           </indexterm>
 | 
|---|
| 386 |         </listitem>
 | 
|---|
| 387 |       </varlistentry>
 | 
|---|
| 388 | 
 | 
|---|
| 389 |       <varlistentry id="getent">
 | 
|---|
| 390 |         <term><command>getent</command></term>
 | 
|---|
| 391 |         <listitem>
 | 
|---|
| 392 |           <para>Gets entries from an administrative database</para>
 | 
|---|
| 393 |           <indexterm zone="ch-system-eglibc getent">
 | 
|---|
| 394 |             <primary sortas="b-getent">getent</primary>
 | 
|---|
| 395 |           </indexterm>
 | 
|---|
| 396 |         </listitem>
 | 
|---|
| 397 |       </varlistentry>
 | 
|---|
| 398 | 
 | 
|---|
| 399 |       <varlistentry id="iconv">
 | 
|---|
| 400 |         <term><command>iconv</command></term>
 | 
|---|
| 401 |         <listitem>
 | 
|---|
| 402 |           <para>Performs character set conversion</para>
 | 
|---|
| 403 |           <indexterm zone="ch-system-eglibc iconv">
 | 
|---|
| 404 |             <primary sortas="b-iconv">iconv</primary>
 | 
|---|
| 405 |           </indexterm>
 | 
|---|
| 406 |         </listitem>
 | 
|---|
| 407 |       </varlistentry>
 | 
|---|
| 408 | 
 | 
|---|
| 409 |       <varlistentry id="iconvconfig">
 | 
|---|
| 410 |         <term><command>iconvconfig</command></term>
 | 
|---|
| 411 |         <listitem>
 | 
|---|
| 412 |           <para>Creates fastloading <command>iconv</command> module configuration
 | 
|---|
| 413 |           files</para>
 | 
|---|
| 414 |           <indexterm zone="ch-system-eglibc iconvconfig">
 | 
|---|
| 415 |             <primary sortas="b-iconvconfig">iconvconfig</primary>
 | 
|---|
| 416 |           </indexterm>
 | 
|---|
| 417 |         </listitem>
 | 
|---|
| 418 |       </varlistentry>
 | 
|---|
| 419 | 
 | 
|---|
| 420 |       <varlistentry id="ldconfig">
 | 
|---|
| 421 |         <term><command>ldconfig</command></term>
 | 
|---|
| 422 |         <listitem>
 | 
|---|
| 423 |           <para>Configures the dynamic linker runtime bindings</para>
 | 
|---|
| 424 |           <indexterm zone="ch-system-eglibc ldconfig">
 | 
|---|
| 425 |             <primary sortas="b-ldconfig">ldconfig</primary>
 | 
|---|
| 426 |           </indexterm>
 | 
|---|
| 427 |         </listitem>
 | 
|---|
| 428 |       </varlistentry>
 | 
|---|
| 429 | 
 | 
|---|
| 430 |       <varlistentry id="ldd">
 | 
|---|
| 431 |         <term><command>ldd</command></term>
 | 
|---|
| 432 |         <listitem>
 | 
|---|
| 433 |           <para>Reports which shared libraries are required
 | 
|---|
| 434 |           by each given program or shared library</para>
 | 
|---|
| 435 |           <indexterm zone="ch-system-eglibc ldd">
 | 
|---|
| 436 |             <primary sortas="b-ldd">ldd</primary>
 | 
|---|
| 437 |           </indexterm>
 | 
|---|
| 438 |         </listitem>
 | 
|---|
| 439 |       </varlistentry>
 | 
|---|
| 440 | 
 | 
|---|
| 441 |       <varlistentry id="lddlibc4">
 | 
|---|
| 442 |         <term><command>lddlibc4</command></term>
 | 
|---|
| 443 |         <listitem>
 | 
|---|
| 444 |           <para>Assists <command>ldd</command> with object files</para>
 | 
|---|
| 445 |           <indexterm zone="ch-system-eglibc lddlibc4">
 | 
|---|
| 446 |             <primary sortas="b-lddlibc4">lddlibc4</primary>
 | 
|---|
| 447 |           </indexterm>
 | 
|---|
| 448 |         </listitem>
 | 
|---|
| 449 |       </varlistentry>
 | 
|---|
| 450 | 
 | 
|---|
| 451 |       <varlistentry id="locale">
 | 
|---|
| 452 |         <term><command>locale</command></term>
 | 
|---|
| 453 |         <listitem>
 | 
|---|
| 454 |           <para>Tells the compiler to enable or disable the use of POSIX locales
 | 
|---|
| 455 |           for built-in operations</para>
 | 
|---|
| 456 |           <indexterm zone="ch-system-eglibc locale">
 | 
|---|
| 457 |             <primary sortas="b-locale">locale</primary>
 | 
|---|
| 458 |           </indexterm>
 | 
|---|
| 459 |         </listitem>
 | 
|---|
| 460 |       </varlistentry>
 | 
|---|
| 461 | 
 | 
|---|
| 462 |       <varlistentry id="localedef">
 | 
|---|
| 463 |         <term><command>localedef</command></term>
 | 
|---|
| 464 |         <listitem>
 | 
|---|
| 465 |           <para>Compiles locale specifications</para>
 | 
|---|
| 466 |           <indexterm zone="ch-system-eglibc localedef">
 | 
|---|
| 467 |             <primary sortas="b-localedef">localedef</primary>
 | 
|---|
| 468 |           </indexterm>
 | 
|---|
| 469 |         </listitem>
 | 
|---|
| 470 |       </varlistentry>
 | 
|---|
| 471 | 
 | 
|---|
| 472 |       <varlistentry id="mtrace">
 | 
|---|
| 473 |         <term><command>mtrace</command></term>
 | 
|---|
| 474 |         <listitem>
 | 
|---|
| 475 |           <para>Reads and interprets a memory trace file and
 | 
|---|
| 476 |           displays a summary in human-readable format</para>
 | 
|---|
| 477 |           <indexterm zone="ch-system-eglibc mtrace">
 | 
|---|
| 478 |             <primary sortas="b-mtrace">mtrace</primary>
 | 
|---|
| 479 |           </indexterm>
 | 
|---|
| 480 |         </listitem>
 | 
|---|
| 481 |       </varlistentry>
 | 
|---|
| 482 | 
 | 
|---|
| 483 |       <varlistentry id="nscd">
 | 
|---|
| 484 |         <term><command>nscd</command></term>
 | 
|---|
| 485 |         <listitem>
 | 
|---|
| 486 |           <para>A daemon that provides a cache for the most common name
 | 
|---|
| 487 |           service requests</para>
 | 
|---|
| 488 |           <indexterm zone="ch-system-eglibc nscd">
 | 
|---|
| 489 |             <primary sortas="b-nscd">nscd</primary>
 | 
|---|
| 490 |           </indexterm>
 | 
|---|
| 491 |         </listitem>
 | 
|---|
| 492 |       </varlistentry>
 | 
|---|
| 493 | 
 | 
|---|
| 494 |       <varlistentry id="pcprofiledump">
 | 
|---|
| 495 |         <term><command>pcprofiledump</command></term>
 | 
|---|
| 496 |         <listitem>
 | 
|---|
| 497 |           <para>Dumps information generated by PC profiling</para>
 | 
|---|
| 498 |           <indexterm zone="ch-system-eglibc pcprofiledump">
 | 
|---|
| 499 |             <primary sortas="b-pcprofiledump">pcprofiledump</primary>
 | 
|---|
| 500 |           </indexterm>
 | 
|---|
| 501 |         </listitem>
 | 
|---|
| 502 |       </varlistentry>
 | 
|---|
| 503 | 
 | 
|---|
| 504 |       <varlistentry id="pt_chown">
 | 
|---|
| 505 |         <term><command>pt_chown</command></term>
 | 
|---|
| 506 |         <listitem>
 | 
|---|
| 507 |           <para>A helper program for <command>grantpt</command> to set the owner,
 | 
|---|
| 508 |           group and access permissions of a slave pseudo terminal</para>
 | 
|---|
| 509 |           <indexterm zone="ch-system-eglibc pt_chown">
 | 
|---|
| 510 |             <primary sortas="b-pt_chown">pt_chown</primary>
 | 
|---|
| 511 |           </indexterm>
 | 
|---|
| 512 |         </listitem>
 | 
|---|
| 513 |       </varlistentry>
 | 
|---|
| 514 | 
 | 
|---|
| 515 |       <varlistentry id="rpcgen">
 | 
|---|
| 516 |         <term><command>rpcgen</command></term>
 | 
|---|
| 517 |         <listitem>
 | 
|---|
| 518 |           <para>Generates C code to implement the Remote Procecure Call (RPC)
 | 
|---|
| 519 |           protocol</para>
 | 
|---|
| 520 |           <indexterm zone="ch-system-eglibc rpcgen">
 | 
|---|
| 521 |             <primary sortas="b-rpcgen">rpcgen</primary>
 | 
|---|
| 522 |           </indexterm>
 | 
|---|
| 523 |         </listitem>
 | 
|---|
| 524 |       </varlistentry>
 | 
|---|
| 525 | 
 | 
|---|
| 526 |       <varlistentry id="rpcinfo">
 | 
|---|
| 527 |         <term><command>rpcinfo</command></term>
 | 
|---|
| 528 |         <listitem>
 | 
|---|
| 529 |           <para>Makes an RPC call to an RPC server</para>
 | 
|---|
| 530 |           <indexterm zone="ch-system-eglibc rpcinfo">
 | 
|---|
| 531 |             <primary sortas="b-rpcinfo">rpcinfo</primary>
 | 
|---|
| 532 |           </indexterm>
 | 
|---|
| 533 |         </listitem>
 | 
|---|
| 534 |       </varlistentry>
 | 
|---|
| 535 | 
 | 
|---|
| 536 |       <varlistentry id="sln">
 | 
|---|
| 537 |         <term><command>sln</command></term>
 | 
|---|
| 538 |         <listitem>
 | 
|---|
| 539 |           <para>A statically linked program that creates symbolic links</para>
 | 
|---|
| 540 |           <indexterm zone="ch-system-eglibc sln">
 | 
|---|
| 541 |             <primary sortas="b-sln">sln</primary>
 | 
|---|
| 542 |           </indexterm>
 | 
|---|
| 543 |         </listitem>
 | 
|---|
| 544 |       </varlistentry>
 | 
|---|
| 545 | 
 | 
|---|
| 546 |       <varlistentry id="sprof">
 | 
|---|
| 547 |         <term><command>sprof</command></term>
 | 
|---|
| 548 |         <listitem>
 | 
|---|
| 549 |           <para>Reads and displays shared object profiling data</para>
 | 
|---|
| 550 |           <indexterm zone="ch-system-eglibc sprof">
 | 
|---|
| 551 |             <primary sortas="b-sprof">sprof</primary>
 | 
|---|
| 552 |           </indexterm>
 | 
|---|
| 553 |         </listitem>
 | 
|---|
| 554 |       </varlistentry>
 | 
|---|
| 555 | 
 | 
|---|
| 556 |       <varlistentry id="tzselect">
 | 
|---|
| 557 |         <term><command>tzselect</command></term>
 | 
|---|
| 558 |         <listitem>
 | 
|---|
| 559 |           <para>Asks the user about the location of the
 | 
|---|
| 560 |           system and reports the corresponding time zone description</para>
 | 
|---|
| 561 |           <indexterm zone="ch-system-eglibc tzselect">
 | 
|---|
| 562 |             <primary sortas="b-tzselect">tzselect</primary>
 | 
|---|
| 563 |           </indexterm>
 | 
|---|
| 564 |         </listitem>
 | 
|---|
| 565 |       </varlistentry>
 | 
|---|
| 566 | 
 | 
|---|
| 567 |       <varlistentry id="xtrace">
 | 
|---|
| 568 |         <term><command>xtrace</command></term>
 | 
|---|
| 569 |         <listitem>
 | 
|---|
| 570 |           <para>Traces the execution of a program by
 | 
|---|
| 571 |           printing the currently executed function</para>
 | 
|---|
| 572 |           <indexterm zone="ch-system-eglibc xtrace">
 | 
|---|
| 573 |             <primary sortas="b-xtrace">xtrace</primary>
 | 
|---|
| 574 |           </indexterm>
 | 
|---|
| 575 |         </listitem>
 | 
|---|
| 576 |       </varlistentry>
 | 
|---|
| 577 | 
 | 
|---|
| 578 |       <varlistentry id="zdump">
 | 
|---|
| 579 |         <term><command>zdump</command></term>
 | 
|---|
| 580 |         <listitem>
 | 
|---|
| 581 |           <para>The time zone dumper</para>
 | 
|---|
| 582 |           <indexterm zone="ch-system-eglibc zdump">
 | 
|---|
| 583 |             <primary sortas="b-zdump">zdump</primary>
 | 
|---|
| 584 |           </indexterm>
 | 
|---|
| 585 |         </listitem>
 | 
|---|
| 586 |       </varlistentry>
 | 
|---|
| 587 | 
 | 
|---|
| 588 |       <varlistentry id="zic">
 | 
|---|
| 589 |         <term><command>zic</command></term>
 | 
|---|
| 590 |         <listitem>
 | 
|---|
| 591 |           <para>The time zone compiler</para>
 | 
|---|
| 592 |           <indexterm zone="ch-system-eglibc zic">
 | 
|---|
| 593 |             <primary sortas="b-zic">zic</primary>
 | 
|---|
| 594 |           </indexterm>
 | 
|---|
| 595 |         </listitem>
 | 
|---|
| 596 |       </varlistentry>
 | 
|---|
| 597 | 
 | 
|---|
| 598 |       <varlistentry id="ld.so">
 | 
|---|
| 599 |         <term><filename class="libraryfile">ld.so</filename></term>
 | 
|---|
| 600 |         <listitem>
 | 
|---|
| 601 |           <para>The helper program for shared library executables</para>
 | 
|---|
| 602 |           <indexterm zone="ch-system-eglibc ld.so">
 | 
|---|
| 603 |             <primary sortas="c-ld.so">ld.so</primary>
 | 
|---|
| 604 |           </indexterm>
 | 
|---|
| 605 |         </listitem>
 | 
|---|
| 606 |       </varlistentry>
 | 
|---|
| 607 | 
 | 
|---|
| 608 |       <varlistentry id="libBrokenLocale">
 | 
|---|
| 609 |         <term><filename class="libraryfile">libBrokenLocale</filename></term>
 | 
|---|
| 610 |         <listitem>
 | 
|---|
| 611 |           <para>Used by programs, such as Mozilla, to solve broken locales</para>
 | 
|---|
| 612 |           <indexterm zone="ch-system-eglibc libBrokenLocale">
 | 
|---|
| 613 |             <primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
 | 
|---|
| 614 |           </indexterm>
 | 
|---|
| 615 |         </listitem>
 | 
|---|
| 616 |       </varlistentry>
 | 
|---|
| 617 | 
 | 
|---|
| 618 |       <varlistentry id="libSegFault">
 | 
|---|
| 619 |         <term><filename class="libraryfile">libSegFault</filename></term>
 | 
|---|
| 620 |         <listitem>
 | 
|---|
| 621 |           <para>The segmentation fault signal handler</para>
 | 
|---|
| 622 |           <indexterm zone="ch-system-eglibc libSegFault">
 | 
|---|
| 623 |             <primary sortas="c-libSegFault">libSegFault</primary>
 | 
|---|
| 624 |           </indexterm>
 | 
|---|
| 625 |         </listitem>
 | 
|---|
| 626 |       </varlistentry>
 | 
|---|
| 627 | 
 | 
|---|
| 628 |       <varlistentry id="libanl">
 | 
|---|
| 629 |         <term><filename class="libraryfile">libanl</filename></term>
 | 
|---|
| 630 |         <listitem>
 | 
|---|
| 631 |           <para>An asynchronous name lookup library</para>
 | 
|---|
| 632 |           <indexterm zone="ch-system-eglibc libanl">
 | 
|---|
| 633 |             <primary sortas="c-libanl">libanl</primary>
 | 
|---|
| 634 |           </indexterm>
 | 
|---|
| 635 |         </listitem>
 | 
|---|
| 636 |       </varlistentry>
 | 
|---|
| 637 | 
 | 
|---|
| 638 |       <varlistentry id="libbsd-compat">
 | 
|---|
| 639 |         <term><filename class="libraryfile">libbsd-compat</filename></term>
 | 
|---|
| 640 |         <listitem>
 | 
|---|
| 641 |           <para>Provides the portability needed
 | 
|---|
| 642 |           in order to run certain Berkey Software Distribution (BSD) programs
 | 
|---|
| 643 |           under Linux</para>
 | 
|---|
| 644 |           <indexterm zone="ch-system-eglibc libbsd-compat">
 | 
|---|
| 645 |             <primary sortas="c-libbsd-compat">libbsd-compat</primary>
 | 
|---|
| 646 |           </indexterm>
 | 
|---|
| 647 |         </listitem>
 | 
|---|
| 648 |       </varlistentry>
 | 
|---|
| 649 | 
 | 
|---|
| 650 |       <varlistentry id="libc">
 | 
|---|
| 651 |         <term><filename class="libraryfile">libc</filename></term>
 | 
|---|
| 652 |         <listitem>
 | 
|---|
| 653 |           <para>The main C library</para>
 | 
|---|
| 654 |           <indexterm zone="ch-system-eglibc libc">
 | 
|---|
| 655 |             <primary sortas="c-libc">libc</primary>
 | 
|---|
| 656 |           </indexterm>
 | 
|---|
| 657 |         </listitem>
 | 
|---|
| 658 |       </varlistentry>
 | 
|---|
| 659 | 
 | 
|---|
| 660 |       <varlistentry id="libcidn">
 | 
|---|
| 661 |         <term><filename class="libraryfile">libcidn</filename></term>
 | 
|---|
| 662 |         <listitem>
 | 
|---|
| 663 |           <para>Used internally by EGLIBC for handling internationalized domain
 | 
|---|
| 664 |           names in the <function>getaddrinfo()</function> function</para>
 | 
|---|
| 665 |           <indexterm zone="ch-system-eglibc libcidn">
 | 
|---|
| 666 |             <primary sortas="c-libcidn">libcidn</primary>
 | 
|---|
| 667 |           </indexterm>
 | 
|---|
| 668 |         </listitem>
 | 
|---|
| 669 |       </varlistentry>
 | 
|---|
| 670 | 
 | 
|---|
| 671 |       <varlistentry id="libcrypt">
 | 
|---|
| 672 |         <term><filename class="libraryfile">libcrypt</filename></term>
 | 
|---|
| 673 |         <listitem>
 | 
|---|
| 674 |           <para>The cryptography library</para>
 | 
|---|
| 675 |           <indexterm zone="ch-system-eglibc libcrypt">
 | 
|---|
| 676 |             <primary sortas="c-libcrypt">libcrypt</primary>
 | 
|---|
| 677 |           </indexterm>
 | 
|---|
| 678 |         </listitem>
 | 
|---|
| 679 |       </varlistentry>
 | 
|---|
| 680 | 
 | 
|---|
| 681 |       <varlistentry id="libdl">
 | 
|---|
| 682 |         <term><filename class="libraryfile">libdl</filename></term>
 | 
|---|
| 683 |         <listitem>
 | 
|---|
| 684 |           <para>The dynamic linking interface library</para>
 | 
|---|
| 685 |           <indexterm zone="ch-system-eglibc libdl">
 | 
|---|
| 686 |             <primary sortas="c-libdl">libdl</primary>
 | 
|---|
| 687 |           </indexterm>
 | 
|---|
| 688 |         </listitem>
 | 
|---|
| 689 |       </varlistentry>
 | 
|---|
| 690 | 
 | 
|---|
| 691 |       <varlistentry id="libg">
 | 
|---|
| 692 |         <term><filename class="libraryfile">libg</filename></term>
 | 
|---|
| 693 |         <listitem>
 | 
|---|
| 694 |           <para>A runtime library for <command>g++</command></para>
 | 
|---|
| 695 |           <indexterm zone="ch-system-eglibc libg">
 | 
|---|
| 696 |             <primary sortas="c-libg">libg</primary>
 | 
|---|
| 697 |           </indexterm>
 | 
|---|
| 698 |         </listitem>
 | 
|---|
| 699 |       </varlistentry>
 | 
|---|
| 700 | 
 | 
|---|
| 701 |       <varlistentry id="libieee">
 | 
|---|
| 702 |         <term><filename class="libraryfile">libieee</filename></term>
 | 
|---|
| 703 |         <listitem>
 | 
|---|
| 704 |           <para>The Institute of Electrical and Electronic Engineers (IEEE)
 | 
|---|
| 705 |           floating point library</para>
 | 
|---|
| 706 |           <indexterm zone="ch-system-eglibc libieee">
 | 
|---|
| 707 |             <primary sortas="c-libieee">libieee</primary>
 | 
|---|
| 708 |           </indexterm>
 | 
|---|
| 709 |         </listitem>
 | 
|---|
| 710 |       </varlistentry>
 | 
|---|
| 711 | 
 | 
|---|
| 712 |       <varlistentry id="libm">
 | 
|---|
| 713 |         <term><filename class="libraryfile">libm</filename></term>
 | 
|---|
| 714 |         <listitem>
 | 
|---|
| 715 |           <para>The mathematical library</para>
 | 
|---|
| 716 |           <indexterm zone="ch-system-eglibc libm">
 | 
|---|
| 717 |             <primary sortas="c-libm">libm</primary>
 | 
|---|
| 718 |           </indexterm>
 | 
|---|
| 719 |         </listitem>
 | 
|---|
| 720 |       </varlistentry>
 | 
|---|
| 721 | 
 | 
|---|
| 722 |       <varlistentry id="libmcheck">
 | 
|---|
| 723 |         <term><filename class="libraryfile">libmcheck</filename></term>
 | 
|---|
| 724 |         <listitem>
 | 
|---|
| 725 |           <para>Contains code run at boot</para>
 | 
|---|
| 726 |           <indexterm zone="ch-system-eglibc libmcheck">
 | 
|---|
| 727 |             <primary sortas="c-libmcheck">libmcheck</primary>
 | 
|---|
| 728 |           </indexterm>
 | 
|---|
| 729 |         </listitem>
 | 
|---|
| 730 |       </varlistentry>
 | 
|---|
| 731 | 
 | 
|---|
| 732 |       <varlistentry id="libmemusage">
 | 
|---|
| 733 |         <term><filename class="libraryfile">libmemusage</filename></term>
 | 
|---|
| 734 |         <listitem>
 | 
|---|
| 735 |           <para>Used by <command>memusage</command> (included in EGLIBC, but
 | 
|---|
| 736 |           not built in a base CLFS system as it has additional dependencies)
 | 
|---|
| 737 |           to help collect information about the memory usage of a program</para>
 | 
|---|
| 738 |           <indexterm zone="ch-system-eglibc libmemusage">
 | 
|---|
| 739 |             <primary sortas="c-libmemusage">libmemusage</primary>
 | 
|---|
| 740 |           </indexterm>
 | 
|---|
| 741 |         </listitem>
 | 
|---|
| 742 |       </varlistentry>
 | 
|---|
| 743 | 
 | 
|---|
| 744 |       <varlistentry id="libnsl">
 | 
|---|
| 745 |         <term><filename class="libraryfile">libnsl</filename></term>
 | 
|---|
| 746 |         <listitem>
 | 
|---|
| 747 |           <para>The network services library</para>
 | 
|---|
| 748 |           <indexterm zone="ch-system-eglibc libnsl">
 | 
|---|
| 749 |             <primary sortas="c-libnsl">libnsl</primary>
 | 
|---|
| 750 |           </indexterm>
 | 
|---|
| 751 |         </listitem>
 | 
|---|
| 752 |       </varlistentry>
 | 
|---|
| 753 | 
 | 
|---|
| 754 |       <varlistentry id="libnss">
 | 
|---|
| 755 |         <term><filename class="libraryfile">libnss</filename></term>
 | 
|---|
| 756 |         <listitem>
 | 
|---|
| 757 |           <para>The Name Service Switch libraries, containing functions for
 | 
|---|
| 758 |           resolving host names, user names, group names, aliases, services,
 | 
|---|
| 759 |           protocols, etc.</para>
 | 
|---|
| 760 |           <indexterm zone="ch-system-eglibc libnss">
 | 
|---|
| 761 |             <primary sortas="c-libnss">libnss</primary>
 | 
|---|
| 762 |           </indexterm>
 | 
|---|
| 763 |         </listitem>
 | 
|---|
| 764 |       </varlistentry>
 | 
|---|
| 765 | 
 | 
|---|
| 766 |       <varlistentry id="libpcprofile">
 | 
|---|
| 767 |         <term><filename class="libraryfile">libpcprofile</filename></term>
 | 
|---|
| 768 |         <listitem>
 | 
|---|
| 769 |           <para>Contains profiling functions used to track the amount of CPU
 | 
|---|
| 770 |           time spent in specific source code lines</para>
 | 
|---|
| 771 |           <indexterm zone="ch-system-eglibc libpcprofile">
 | 
|---|
| 772 |             <primary sortas="c-libpcprofile">libpcprofile</primary>
 | 
|---|
| 773 |           </indexterm>
 | 
|---|
| 774 |         </listitem>
 | 
|---|
| 775 |       </varlistentry>
 | 
|---|
| 776 | 
 | 
|---|
| 777 |       <varlistentry id="libpthread">
 | 
|---|
| 778 |         <term><filename class="libraryfile">libpthread</filename></term>
 | 
|---|
| 779 |         <listitem>
 | 
|---|
| 780 |           <para>The POSIX threads library</para>
 | 
|---|
| 781 |           <indexterm zone="ch-system-eglibc libpthread">
 | 
|---|
| 782 |             <primary sortas="c-libpthread">libpthread</primary>
 | 
|---|
| 783 |           </indexterm>
 | 
|---|
| 784 |         </listitem>
 | 
|---|
| 785 |       </varlistentry>
 | 
|---|
| 786 | 
 | 
|---|
| 787 |       <varlistentry id="libresolv">
 | 
|---|
| 788 |         <term><filename class="libraryfile">libresolv</filename></term>
 | 
|---|
| 789 |         <listitem>
 | 
|---|
| 790 |           <para>Contains functions for creating, sending, and interpreting
 | 
|---|
| 791 |           packets to the Internet domain name servers</para>
 | 
|---|
| 792 |           <indexterm zone="ch-system-eglibc libresolv">
 | 
|---|
| 793 |             <primary sortas="c-libresolv">libresolv</primary>
 | 
|---|
| 794 |           </indexterm>
 | 
|---|
| 795 |         </listitem>
 | 
|---|
| 796 |       </varlistentry>
 | 
|---|
| 797 | 
 | 
|---|
| 798 |       <varlistentry id="librpcsvc">
 | 
|---|
| 799 |         <term><filename class="libraryfile">librpcsvc</filename></term>
 | 
|---|
| 800 |         <listitem>
 | 
|---|
| 801 |           <para>Contains functions providing miscellaneous RPC services</para>
 | 
|---|
| 802 |           <indexterm zone="ch-system-eglibc librpcsvc">
 | 
|---|
| 803 |             <primary sortas="c-librpcsvc">librpcsvc</primary>
 | 
|---|
| 804 |           </indexterm>
 | 
|---|
| 805 |         </listitem>
 | 
|---|
| 806 |       </varlistentry>
 | 
|---|
| 807 | 
 | 
|---|
| 808 |       <varlistentry id="librt">
 | 
|---|
| 809 |         <term><filename class="libraryfile">librt</filename></term>
 | 
|---|
| 810 |         <listitem>
 | 
|---|
| 811 |           <para>Contains functions providing most of the interfaces specified by
 | 
|---|
| 812 |           the POSIX.1b Realtime Extension</para>
 | 
|---|
| 813 |           <indexterm zone="ch-system-eglibc librt">
 | 
|---|
| 814 |             <primary sortas="c-librt">librt</primary>
 | 
|---|
| 815 |           </indexterm>
 | 
|---|
| 816 |         </listitem>
 | 
|---|
| 817 |       </varlistentry>
 | 
|---|
| 818 | 
 | 
|---|
| 819 |       <varlistentry id="libthread_db">
 | 
|---|
| 820 |         <term><filename class="libraryfile">libthread_db</filename></term>
 | 
|---|
| 821 |         <listitem>
 | 
|---|
| 822 |           <para>Contains functions useful for
 | 
|---|
| 823 |           building debuggers for multi-threaded programs</para>
 | 
|---|
| 824 |           <indexterm zone="ch-system-eglibc libthread_db">
 | 
|---|
| 825 |             <primary sortas="c-libthread_db">libthread_db</primary>
 | 
|---|
| 826 |           </indexterm>
 | 
|---|
| 827 |         </listitem>
 | 
|---|
| 828 |       </varlistentry>
 | 
|---|
| 829 | 
 | 
|---|
| 830 |       <varlistentry id="libutil">
 | 
|---|
| 831 |         <term><filename class="libraryfile">libutil</filename></term>
 | 
|---|
| 832 |         <listitem>
 | 
|---|
| 833 |           <para>Contains code for <quote>standard</quote> functions used in
 | 
|---|
| 834 |           many different Unix utilities</para>
 | 
|---|
| 835 |           <indexterm zone="ch-system-eglibc libutil">
 | 
|---|
| 836 |             <primary sortas="c-libutil">libutil</primary>
 | 
|---|
| 837 |           </indexterm>
 | 
|---|
| 838 |         </listitem>
 | 
|---|
| 839 |       </varlistentry>
 | 
|---|
| 840 | 
 | 
|---|
| 841 |     </variablelist>
 | 
|---|
| 842 | 
 | 
|---|
| 843 |   </sect2>
 | 
|---|
| 844 | 
 | 
|---|
| 845 | </sect1>
 | 
|---|