| 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-glibc" role="wrap">
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| 9 |   <?dbhtml filename="glibc.html"?>
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| 10 | 
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| 11 |   <title>Glibc-&glibc-version;</title>
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| 12 | 
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| 13 |   <indexterm zone="ch-system-glibc">
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| 14 |     <primary sortas="a-Glibc">Glibc</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 Glibc 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 Glibc</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> Glibc 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
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| 43 |     performs its tests by attempting to compile test programs against certain
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| 44 |     libraries. However it does not specify the path to
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| 45 |     <filename class="libraryfile">ld.so</filename>, and our toolchain
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| 46 |     is still configured to use the one in
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| 47 |     <filename class="directory">/tools</filename>. The following set of
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| 48 |     commands will force the script to use the complete path of the new
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| 49 |     <filename class="libraryfile">ld.so</filename> that was just installed:</para>
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| 50 | 
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| 51 | <screen os="l2"><userinput>LINKER=$(readelf -l /tools/bin/bash | sed -n 's@.*interpret.*/tools\(.*\)]$@\1@p')
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| 52 | sed -i "s|libs -o|libs -L/usr/lib -Wl,-dynamic-linker=${LINKER} -o|" \
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| 53 |   scripts/test-installation.pl
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| 54 | unset LINKER</userinput></screen>
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| 55 | 
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| 56 |     <para os="b">The Glibc build system is self-contained and will install
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| 57 |     perfectly, even though the compiler specs file and linker are still
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| 58 |     pointing at <filename class="directory">/tools</filename>. The specs
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| 59 |     and linker cannot be adjusted before the Glibc install because the
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| 60 |     Glibc Autoconf tests would give false results and defeat the goal
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| 61 |     of achieving a clean build.</para>
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| 62 | 
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| 63 |     <para os="e">The Glibc documentation recommends building Glibc outside of     the source directory in a dedicated build directory:</para>
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| 64 | 
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| 65 | <screen os="f"><userinput>mkdir -v ../glibc-build
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| 66 | cd ../glibc-build</userinput></screen>
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| 67 | 
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| 68 |     <para os="g">Prepare Glibc for compilation:</para>
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| 69 | 
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| 70 | <screen os="h"><userinput>../glibc-&glibc-version;/configure \
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| 71 |     --prefix=/usr \
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| 72 |     --enable-kernel=&glibc-kernel-version; \
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| 73 |     --libexecdir=/usr/lib/glibc \
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| 74 |     --enable-obsolete-rpc</userinput></screen>
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| 75 | 
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| 76 |     <variablelist os="i">
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| 77 |       <title>The meaning of the new configure option:</title>
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| 78 | 
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| 79 |       <varlistentry>
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| 80 |         <term><parameter>--libexecdir=/usr/lib/glibc</parameter></term>
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| 81 |         <listitem>
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| 82 |           <para>This changes the location for hard links to the
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| 83 |           <command>getconf</command> utility from their default of <filename
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| 84 |           class="directory">/usr/libexec</filename> to <filename
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| 85 |           class="directory">/usr/lib/glibc</filename>.</para>
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| 86 |         </listitem>
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| 87 |       </varlistentry>
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| 88 |     </variablelist>
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| 89 | 
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| 90 |     <para os="j">Compile the package:</para>
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| 91 | 
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| 92 | <screen os="k"><userinput>make</userinput></screen>
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| 93 | 
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| 94 |     <important os="l">
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| 95 |       <para>Due to Glibc's critical role in a properly functioning system,
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| 96 |       the CLFS developers strongly recommend running the testsuite.</para>
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| 97 |     </important>
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| 98 | 
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| 99 |     <para os="m">Use the following commands to run the test suite and output
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| 100 |     any test failures:</para>
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| 101 | 
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| 102 | <!-- items n,o,p no longer the master, use x86_64 which has no failures -->
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| 103 | 
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| 104 | <screen os="n"><userinput remap="test">make check</userinput></screen>
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| 105 | 
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| 106 |     <para os="o">The Glibc test suite is highly dependent on certain functions of
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| 107 |     the host system, in particular the kernel. The <emphasis>posix/annexc</emphasis> and
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| 108 |     <emphasis>conform/run-conformtest</emphasis> tests normally fail
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| 109 |     and you should see <literal>Error 1 (ignored)</literal> in the output. Apart
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| 110 |     from this, the Glibc test suite is always expected to pass. However, in certain
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| 111 |     circumstances, some failures are unavoidable. If a test fails because of a missing
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| 112 |     program (or missing symbolic link), or a segfault, you will see an error code
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| 113 |     greater than 127 and the details will be in the log. More commonly, tests will
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| 114 |     fail with <literal>Error 2</literal> - for these, the contents of the corresponding
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| 115 |     <filename>.out</filename> file, e.g. <filename>posix/annexc.out</filename> may be
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| 116 |     informative. Here is a list of the most common issues:</para>
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| 117 | 
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| 118 |     <itemizedlist os="p">
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| 119 |       <listitem>
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| 120 |         <para>The <emphasis>nptl/tst-clock2</emphasis>,
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| 121 |         <emphasis>nptl/tst-attr3</emphasis>,
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| 122 |         <emphasis>tst/tst-cputimer1</emphasis>, and
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| 123 |         <emphasis>rt/tst-cpuclock2</emphasis>
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| 124 |         tests have been known to fail.  The
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| 125 |         reason is not completely understood, but indications are that minor
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| 126 |         timing issues can trigger these failures.</para>
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| 127 |       </listitem>
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| 128 |       <listitem>
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| 129 |         <para>The <emphasis>math</emphasis> tests sometimes fail.
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| 130 |         Certain optimization settings are known to be a
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| 131 |         factor here.</para>
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| 132 |       </listitem>
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| 133 |       <listitem>
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| 134 |         <para>If you have mounted the CLFS partition with the
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| 135 |         <parameter>noatime</parameter> option, the <emphasis>atime</emphasis> test
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| 136 |         will fail. As mentioned in <xref linkend="ch-partitioning-mounting"/>,
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| 137 |         do not use the <parameter>noatime</parameter> option while building
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| 138 |         CLFS.</para>
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| 139 |       </listitem>
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| 140 |       <listitem>
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| 141 |         <para>When running on older and slower hardware, some tests
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| 142 |         can fail because of test timeouts being exceeded.
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| 143 |         Modifying the make check command to set a TIMEOUTFACTOR is reported to
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| 144 |         help eliminate these errors (e.g. <command>TIMEOUTFACTOR=16
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| 145 |         make -k check</command>).</para>
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| 146 |       </listitem>
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| 147 |       <listitem>
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| 148 |         <para>posix/tst-getaddrinfo4 will always fail due to not having a network
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| 149 |         connection when the test is run.</para>
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| 150 |       </listitem>
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| 151 |     </itemizedlist>
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| 152 | 
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| 153 |     <para os="q">Though it is a harmless message, the install stage of Glibc will
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| 154 |     complain about the absence of <filename>/etc/ld.so.conf</filename>.
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| 155 |     Prevent this warning with:</para>
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| 156 | 
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| 157 | <screen os="r"><userinput>touch /etc/ld.so.conf</userinput></screen>
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| 158 | 
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| 159 |     <para os="s">Install the package, and remove unneeded files from
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| 160 |     <filename class="directory">/usr/include/rpcsvc</filename>:</para>
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| 161 | 
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| 162 | <screen os="t"><userinput>make install &&
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| 163 | rm -v /usr/include/rpcsvc/*.x</userinput></screen>
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| 164 | 
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| 165 |     <para os="u">Install the configuration file and runtime directory for
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| 166 |     <command>nscd</command>:</para>
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| 167 | 
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| 168 | <screen os="v"><userinput>cp -v ../glibc-&glibc-version;/nscd/nscd.conf /etc/nscd.conf
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| 169 | mkdir -pv /var/cache/nscd</userinput></screen>
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| 170 | 
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| 171 |     <para os="w">Install the systemd support files for <command>nscd</command>:</para>
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| 172 | 
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| 173 | <screen os="x"><userinput>install -v -Dm644 ../glibc-&glibc-version;/nscd/nscd.tmpfiles /usr/lib/tmpfiles.d/nscd.conf
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| 174 | install -v -Dm644 ../glibc-&glibc-version;/nscd/nscd.service /lib/systemd/system/nscd.service</userinput></screen>
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| 175 | 
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| 176 |   </sect2>
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| 177 | 
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| 178 |   <sect2 id="i18n-glibc" role="configuration">
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| 179 |     <title>Internationalization</title>
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| 180 | 
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| 181 |     <para>The locales that can make the system respond in a different
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| 182 |     language were not installed by the above command. Install them
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| 183 |     with:</para>
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| 184 | 
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| 185 | <screen><userinput>make localedata/install-locales</userinput></screen>
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| 186 | 
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| 187 |     <para>To save time, an alternative to running the previous command (which
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| 188 |     generates and installs every locale listed in the
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| 189 |     <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file) is
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| 190 |     to install only those locales that are wanted and needed. This can be
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| 191 |     achieved by using the <command>localedef</command> command. Information on
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| 192 |     this command is located in the <filename>INSTALL</filename> file in the
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| 193 |     Glibc source. However, there are a number of locales that are essential in
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| 194 |     order for the tests of future packages to pass, in particular, the
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| 195 |     <emphasis>libstdc++</emphasis> tests from GCC. The following instructions,
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| 196 |     instead of the <parameter>install-locales</parameter> target used above,
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| 197 |     will install the minimum set of locales necessary for the tests to run
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| 198 |     successfully:</para>
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| 199 | 
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| 200 | <screen role="nodump"><userinput>mkdir -pv /usr/lib/locale
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| 201 | localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
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| 202 | localedef -i de_DE -f ISO-8859-1 de_DE
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| 203 | localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
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| 204 | localedef -i en_HK -f ISO-8859-1 en_HK
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| 205 | localedef -i en_PH -f ISO-8859-1 en_PH
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| 206 | localedef -i en_US -f ISO-8859-1 en_US
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| 207 | localedef -i es_MX -f ISO-8859-1 es_MX
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| 208 | localedef -i fa_IR -f UTF-8 fa_IR
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| 209 | localedef -i fr_FR -f ISO-8859-1 fr_FR
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| 210 | localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
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| 211 | localedef -i it_IT -f ISO-8859-1 it_IT
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| 212 | localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen>
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| 213 | 
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| 214 |     <para>Some locales installed by the <command>make
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| 215 |     localedata/install-locales</command> command above are not properly
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| 216 |     supported by some applications that are in CLFS and CBLFS. Because
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| 217 |     of the various problems that arise due to application programmers making
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| 218 |     assumptions that break in such locales, CLFS should not be used in locales
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| 219 |     that utilize multibyte character sets (including UTF-8) or right-to-left
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| 220 |     writing order.  Numerous unofficial and unstable patches are required to
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| 221 |     fix these problems, and it has been decided by the CLFS developers not to
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| 222 |     support such complex locales at this time. This applies to the ja_JP and
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| 223 |     fa_IR locales as well—they have been installed only for GCC and
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| 224 |     Gettext tests to pass, and the <command>watch</command> program (part of
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| 225 |     the Procps-ng package) does not work properly in them. Various attempts to
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| 226 |     circumvent these restrictions are documented in internationalization-related
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| 227 |     hints.</para>
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| 228 | 
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| 229 |   </sect2>
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| 230 | 
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| 231 |   <sect2 id="conf-glibc" role="configuration">
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| 232 |     <title>Configuring Glibc</title>
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| 233 | 
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| 234 |     <indexterm zone="conf-glibc">
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| 235 |       <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
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| 236 |     </indexterm>
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| 237 | 
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| 238 |     <indexterm zone="conf-glibc">
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| 239 |       <primary sortas="e-/etc/localtime">/etc/localtime</primary>
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| 240 |     </indexterm>
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| 241 | 
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| 242 |     <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
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| 243 |     because, although Glibc provides defaults when this file is missing or
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| 244 |     corrupt, the Glibc defaults do not work well in a networked environment.
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| 245 |     The time zone also needs to be configured.</para>
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| 246 | 
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| 247 |     <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running
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| 248 |     the following:</para>
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| 249 | 
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| 250 | <screen><userinput>cat > /etc/nsswitch.conf << "EOF"
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| 251 | <literal># Begin /etc/nsswitch.conf
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| 252 | 
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| 253 | passwd: files
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| 254 | group: files
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| 255 | shadow: files
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| 256 | 
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| 257 | hosts: files dns
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| 258 | networks: files
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| 259 | 
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| 260 | protocols: files
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| 261 | services: files
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| 262 | ethers: files
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| 263 | rpc: files
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| 264 | 
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| 265 | # End /etc/nsswitch.conf</literal>
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| 266 | EOF</userinput></screen>
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| 267 | 
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| 268 |     <para>Install timezone data:</para>
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| 269 | <screen><userinput>tar -xf ../tzdata&tzdata-version;.tar.gz
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| 270 | 
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| 271 | ZONEINFO=/usr/share/zoneinfo
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| 272 | mkdir -pv $ZONEINFO/{posix,right}
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| 273 | 
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| 274 | for tz in etcetera southamerica northamerica europe africa antarctica \
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| 275 |           asia australasia backward pacificnew systemv; do
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| 276 |     zic -L /dev/null   -d $ZONEINFO       -y "sh yearistype.sh" ${tz}
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| 277 |     zic -L /dev/null   -d $ZONEINFO/posix -y "sh yearistype.sh" ${tz}
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| 278 |     zic -L leapseconds -d $ZONEINFO/right -y "sh yearistype.sh" ${tz}
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| 279 | done
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| 280 | 
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| 281 | cp -v zone.tab zone1970.tab iso3166.tab $ZONEINFO
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| 282 | zic -d $ZONEINFO -p America/New_York
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| 283 | unset ZONEINFO</userinput></screen>
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| 284 | 
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| 285 |     <variablelist>
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| 286 |       <title>The meaning of the zic commands:</title>
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| 287 | 
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| 288 |       <varlistentry>
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| 289 |         <term><parameter>zic -L /dev/null ...</parameter></term>
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| 290 |         <listitem>
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| 291 |           <para>This creates posix timezones, without any leap seconds.  It is
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| 292 |           conventional to put these in both
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| 293 |           <filename class="directory">zoneinfo</filename> and
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| 294 |           <filename class="directory">zoneinfo/posix</filename>. It is
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| 295 |           necessary to put the POSIX timezones in
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| 296 |           <filename class="directory">zoneinfo</filename>, otherwise various
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| 297 |           test-suites will report errors. On an embedded system, where space is
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| 298 |           tight and you do not intend to ever update the timezones, you could save
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| 299 |           1.9MB by not using the <filename class="directory">posix</filename>
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| 300 |           directory, but some applications or test-suites might give less good
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| 301 |           results</para>
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| 302 |         </listitem>
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| 303 |       </varlistentry>
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| 304 |       <varlistentry>
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| 305 |         <term><parameter>zic -L leapseconds ...</parameter></term>
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| 306 |         <listitem>
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| 307 |           <para>This creates right timezones, including leap seconds. On an
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| 308 |           embedded system, where space is tight and you do not intend to
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| 309 |           ever update the timezones, or care about the correct time, you could
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| 310 |           save 1.9MB by omitting the <filename class="directory">right</filename>
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| 311 |           directory.</para>
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| 312 |         </listitem>
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| 313 |       </varlistentry>
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| 314 |       <varlistentry>
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| 315 |         <term><parameter>zic ... -p ...</parameter></term>
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| 316 |         <listitem>
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| 317 |           <para>This creates the <filename>posixrules</filename> file. We use
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| 318 |           New York because POSIX requires the daylight savings time rules
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| 319 |           to be in accordance with US rules.</para>
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| 320 |         </listitem>
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| 321 |       </varlistentry>
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| 322 |     </variablelist>
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| 323 | 
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| 324 |     <para>To determine the local time zone, run the following script:</para>
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| 325 | 
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| 326 | <screen role="nodump"><userinput>tzselect</userinput></screen>
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| 327 | 
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| 328 |     <para>After answering a few questions about the location, the script will
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| 329 |     output the name of the time zone (e.g., <emphasis>EST5EDT</emphasis> or
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| 330 |     <emphasis>Canada/Eastern</emphasis>). Then create the
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| 331 |     <filename>/etc/localtime</filename> file by running:</para>
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| 332 | 
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| 333 | <screen><userinput>cp -v /usr/share/zoneinfo/<replaceable>[xxx]</replaceable> \
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| 334 |     /etc/localtime</userinput></screen>
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| 335 | 
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| 336 |     <para>Replace <replaceable>[xxx]</replaceable> with the name of the time zone
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| 337 |     that <command>tzselect</command> provided (e.g., Canada/Eastern).</para>
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| 338 | 
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| 339 |   </sect2>
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| 340 | 
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| 341 |   <sect2 id="conf-ld" role="configuration">
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| 342 |     <title>Configuring The Dynamic Loader</title>
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| 343 | 
 | 
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| 344 |     <indexterm zone="conf-ld">
 | 
|---|
| 345 |       <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
 | 
|---|
| 346 |     </indexterm>
 | 
|---|
| 347 | 
 | 
|---|
| 348 |     <para os="ld-a">By default, the dynamic loader (<filename
 | 
|---|
| 349 |     class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
 | 
|---|
| 350 |     <filename class="directory">/lib</filename> and <filename
 | 
|---|
| 351 |     class="directory">/usr/lib</filename> for dynamic libraries that are
 | 
|---|
| 352 |     needed by programs as they are run. However, if there are libraries in
 | 
|---|
| 353 |     directories other than <filename class="directory">/lib</filename> and
 | 
|---|
| 354 |     <filename class="directory">/usr/lib</filename>, these need to be
 | 
|---|
| 355 |     added to the <filename>/etc/ld.so.conf</filename> file in order
 | 
|---|
| 356 |     for the dynamic loader to find them. Two directories that are commonly
 | 
|---|
| 357 |     known to contain additional libraries are <filename
 | 
|---|
| 358 |     class="directory">/usr/local/lib</filename> and <filename
 | 
|---|
| 359 |     class="directory">/opt/lib</filename>, so add those directories to the
 | 
|---|
| 360 |     dynamic loader's search path.</para>
 | 
|---|
| 361 | 
 | 
|---|
| 362 |     <para os="ld-b">Create a new file <filename>/etc/ld.so.conf</filename> by running the
 | 
|---|
| 363 |     following:</para>
 | 
|---|
| 364 | 
 | 
|---|
| 365 | <screen os="ld-c"><userinput>cat > /etc/ld.so.conf << "EOF"
 | 
|---|
| 366 | <literal># Begin /etc/ld.so.conf
 | 
|---|
| 367 | 
 | 
|---|
| 368 | /usr/local/lib
 | 
|---|
| 369 | /opt/lib
 | 
|---|
| 370 | 
 | 
|---|
| 371 | # End /etc/ld.so.conf</literal>
 | 
|---|
| 372 | EOF</userinput></screen>
 | 
|---|
| 373 | 
 | 
|---|
| 374 |   </sect2>
 | 
|---|
| 375 | 
 | 
|---|
| 376 |   <sect2 id="contents-glibc" role="content">
 | 
|---|
| 377 |     <title>Contents of Glibc</title>
 | 
|---|
| 378 | 
 | 
|---|
| 379 |     <segmentedlist>
 | 
|---|
| 380 |       <segtitle>Installed programs</segtitle>
 | 
|---|
| 381 |       <segtitle>Installed libraries</segtitle>
 | 
|---|
| 382 |       <segtitle>Installed directories</segtitle>
 | 
|---|
| 383 | 
 | 
|---|
| 384 |       <seglistitem>
 | 
|---|
| 385 |         <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
 | 
|---|
| 386 |         ldd, lddlibc4, locale, localedef, makedb, mtrace, nscd,
 | 
|---|
| 387 |         pcprofiledump, pldd, rpcgen, sln, sotruss, sprof, tzselect, xtrace,
 | 
|---|
| 388 |         zdump, zic</seg>
 | 
|---|
| 389 |         <seg>ld.so, libBrokenLocale.[a,so], libSegFault.so, libanl.[a,so],
 | 
|---|
| 390 |         libc.[a,so], libc_nonshared.a, libcidn.[a,so], libcrypt.[a,so],
 | 
|---|
| 391 |         libdl.[a,so], libg.a, libieee.a, libm.[a,so], libmcheck.a,
 | 
|---|
| 392 |         libmemusage.so, libnsl.a, libnss_compat.so, libnss_dns.so,
 | 
|---|
| 393 |         libnss_files.so, libnss_hesiod.so, libnss_nis.so, libnss_nisplus.so,
 | 
|---|
| 394 |         libpcprofile.so, libpthread.[a,so], libpthread_nonshared.a,
 | 
|---|
| 395 |         libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so,
 | 
|---|
| 396 |         libutil.[a,so]</seg>
 | 
|---|
| 397 |         <seg>/usr/include/arpa, /usr/include/bits, /usr/include/gnu,
 | 
|---|
| 398 |         /usr/include/net, /usr/include/netash, /usr/include/netatalk,
 | 
|---|
| 399 |         /usr/include/netax25, /usr/include/neteconet, /usr/include/netinet,
 | 
|---|
| 400 |         /usr/include/netipx, /usr/include/netiucv, /usr/include/netpacket,
 | 
|---|
| 401 |         /usr/include/netrom, /usr/include/netrose, /usr/include/nfs,
 | 
|---|
| 402 |         /usr/include/protocols, /usr/include/rpc, /usr/include/rpcsvc,
 | 
|---|
| 403 |         /usr/include/scsi, /usr/include/sys, /usr/lib/audit, /usr/lib/gconv,
 | 
|---|
| 404 |         /usr/lib/glibc, /usr/lib/locale, /usr/share/i18n, /usr/share/zoneinfo,
 | 
|---|
| 405 |         /var/cache/ldconfig, /var/cache/nscd</seg>
 | 
|---|
| 406 |       </seglistitem>
 | 
|---|
| 407 |     </segmentedlist>
 | 
|---|
| 408 | 
 | 
|---|
| 409 |     <variablelist>
 | 
|---|
| 410 |       <bridgehead renderas="sect3">Short Descriptions</bridgehead>
 | 
|---|
| 411 |       <?dbfo list-presentation="list"?>
 | 
|---|
| 412 |       <?dbhtml list-presentation="table"?>
 | 
|---|
| 413 | 
 | 
|---|
| 414 |       <varlistentry id="catchsegv">
 | 
|---|
| 415 |         <term><command>catchsegv</command></term>
 | 
|---|
| 416 |         <listitem>
 | 
|---|
| 417 |           <para>Can be used to create a stack trace when a program
 | 
|---|
| 418 |           terminates with a segmentation fault</para>
 | 
|---|
| 419 |           <indexterm zone="ch-system-glibc catchsegv">
 | 
|---|
| 420 |             <primary sortas="b-catchsegv">catchsegv</primary>
 | 
|---|
| 421 |           </indexterm>
 | 
|---|
| 422 |         </listitem>
 | 
|---|
| 423 |       </varlistentry>
 | 
|---|
| 424 | 
 | 
|---|
| 425 |       <varlistentry id="gencat">
 | 
|---|
| 426 |         <term><command>gencat</command></term>
 | 
|---|
| 427 |         <listitem>
 | 
|---|
| 428 |           <para>Generates message catalogues</para>
 | 
|---|
| 429 |           <indexterm zone="ch-system-glibc gencat">
 | 
|---|
| 430 |             <primary sortas="b-gencat">gencat</primary>
 | 
|---|
| 431 |           </indexterm>
 | 
|---|
| 432 |         </listitem>
 | 
|---|
| 433 |       </varlistentry>
 | 
|---|
| 434 | 
 | 
|---|
| 435 |       <varlistentry id="getconf">
 | 
|---|
| 436 |         <term><command>getconf</command></term>
 | 
|---|
| 437 |         <listitem>
 | 
|---|
| 438 |           <para>Displays the system configuration values for file system specific
 | 
|---|
| 439 |           variables</para>
 | 
|---|
| 440 |           <indexterm zone="ch-system-glibc getconf">
 | 
|---|
| 441 |             <primary sortas="b-getconf">getconf</primary>
 | 
|---|
| 442 |           </indexterm>
 | 
|---|
| 443 |         </listitem>
 | 
|---|
| 444 |       </varlistentry>
 | 
|---|
| 445 | 
 | 
|---|
| 446 |       <varlistentry id="getent">
 | 
|---|
| 447 |         <term><command>getent</command></term>
 | 
|---|
| 448 |         <listitem>
 | 
|---|
| 449 |           <para>Gets entries from an administrative database</para>
 | 
|---|
| 450 |           <indexterm zone="ch-system-glibc getent">
 | 
|---|
| 451 |             <primary sortas="b-getent">getent</primary>
 | 
|---|
| 452 |           </indexterm>
 | 
|---|
| 453 |         </listitem>
 | 
|---|
| 454 |       </varlistentry>
 | 
|---|
| 455 | 
 | 
|---|
| 456 |       <varlistentry id="iconv">
 | 
|---|
| 457 |         <term><command>iconv</command></term>
 | 
|---|
| 458 |         <listitem>
 | 
|---|
| 459 |           <para>Performs character set conversion</para>
 | 
|---|
| 460 |           <indexterm zone="ch-system-glibc iconv">
 | 
|---|
| 461 |             <primary sortas="b-iconv">iconv</primary>
 | 
|---|
| 462 |           </indexterm>
 | 
|---|
| 463 |         </listitem>
 | 
|---|
| 464 |       </varlistentry>
 | 
|---|
| 465 | 
 | 
|---|
| 466 |       <varlistentry id="iconvconfig">
 | 
|---|
| 467 |         <term><command>iconvconfig</command></term>
 | 
|---|
| 468 |         <listitem>
 | 
|---|
| 469 |           <para>Creates fastloading <command>iconv</command> module configuration
 | 
|---|
| 470 |           files</para>
 | 
|---|
| 471 |           <indexterm zone="ch-system-glibc iconvconfig">
 | 
|---|
| 472 |             <primary sortas="b-iconvconfig">iconvconfig</primary>
 | 
|---|
| 473 |           </indexterm>
 | 
|---|
| 474 |         </listitem>
 | 
|---|
| 475 |       </varlistentry>
 | 
|---|
| 476 | 
 | 
|---|
| 477 |       <varlistentry id="ldconfig">
 | 
|---|
| 478 |         <term><command>ldconfig</command></term>
 | 
|---|
| 479 |         <listitem>
 | 
|---|
| 480 |           <para>Configures the dynamic linker runtime bindings</para>
 | 
|---|
| 481 |           <indexterm zone="ch-system-glibc ldconfig">
 | 
|---|
| 482 |             <primary sortas="b-ldconfig">ldconfig</primary>
 | 
|---|
| 483 |           </indexterm>
 | 
|---|
| 484 |         </listitem>
 | 
|---|
| 485 |       </varlistentry>
 | 
|---|
| 486 | 
 | 
|---|
| 487 |       <varlistentry id="ldd">
 | 
|---|
| 488 |         <term><command>ldd</command></term>
 | 
|---|
| 489 |         <listitem>
 | 
|---|
| 490 |           <para>Reports which shared libraries are required
 | 
|---|
| 491 |           by each given program or shared library</para>
 | 
|---|
| 492 |           <indexterm zone="ch-system-glibc ldd">
 | 
|---|
| 493 |             <primary sortas="b-ldd">ldd</primary>
 | 
|---|
| 494 |           </indexterm>
 | 
|---|
| 495 |         </listitem>
 | 
|---|
| 496 |       </varlistentry>
 | 
|---|
| 497 | 
 | 
|---|
| 498 |       <varlistentry id="lddlibc4">
 | 
|---|
| 499 |         <term><command>lddlibc4</command></term>
 | 
|---|
| 500 |         <listitem>
 | 
|---|
| 501 |           <para>Assists <command>ldd</command> with object files</para>
 | 
|---|
| 502 |           <indexterm zone="ch-system-glibc lddlibc4">
 | 
|---|
| 503 |             <primary sortas="b-lddlibc4">lddlibc4</primary>
 | 
|---|
| 504 |           </indexterm>
 | 
|---|
| 505 |         </listitem>
 | 
|---|
| 506 |       </varlistentry>
 | 
|---|
| 507 | 
 | 
|---|
| 508 |       <varlistentry id="locale">
 | 
|---|
| 509 |         <term><command>locale</command></term>
 | 
|---|
| 510 |         <listitem>
 | 
|---|
| 511 |           <para>Tells the compiler to enable or disable the use of POSIX locales
 | 
|---|
| 512 |           for built-in operations</para>
 | 
|---|
| 513 |           <indexterm zone="ch-system-glibc locale">
 | 
|---|
| 514 |             <primary sortas="b-locale">locale</primary>
 | 
|---|
| 515 |           </indexterm>
 | 
|---|
| 516 |         </listitem>
 | 
|---|
| 517 |       </varlistentry>
 | 
|---|
| 518 | 
 | 
|---|
| 519 |       <varlistentry id="localedef">
 | 
|---|
| 520 |         <term><command>localedef</command></term>
 | 
|---|
| 521 |         <listitem>
 | 
|---|
| 522 |           <para>Compiles locale specifications</para>
 | 
|---|
| 523 |           <indexterm zone="ch-system-glibc localedef">
 | 
|---|
| 524 |             <primary sortas="b-localedef">localedef</primary>
 | 
|---|
| 525 |           </indexterm>
 | 
|---|
| 526 |         </listitem>
 | 
|---|
| 527 |       </varlistentry>
 | 
|---|
| 528 | 
 | 
|---|
| 529 |       <varlistentry id="makedb">
 | 
|---|
| 530 |         <term><command>makedb</command></term>
 | 
|---|
| 531 |         <listitem>
 | 
|---|
| 532 |           <para>Creates a simple database from textual input</para>
 | 
|---|
| 533 |           <indexterm zone="ch-system-glibc makedb">
 | 
|---|
| 534 |             <primary sortas="b-makedb">makedb</primary>
 | 
|---|
| 535 |           </indexterm>
 | 
|---|
| 536 |         </listitem>
 | 
|---|
| 537 |       </varlistentry>
 | 
|---|
| 538 | 
 | 
|---|
| 539 |       <varlistentry id="mtrace">
 | 
|---|
| 540 |         <term><command>mtrace</command></term>
 | 
|---|
| 541 |         <listitem>
 | 
|---|
| 542 |           <para>Reads and interprets a memory trace file and
 | 
|---|
| 543 |           displays a summary in human-readable format</para>
 | 
|---|
| 544 |           <indexterm zone="ch-system-glibc mtrace">
 | 
|---|
| 545 |             <primary sortas="b-mtrace">mtrace</primary>
 | 
|---|
| 546 |           </indexterm>
 | 
|---|
| 547 |         </listitem>
 | 
|---|
| 548 |       </varlistentry>
 | 
|---|
| 549 | 
 | 
|---|
| 550 |       <varlistentry id="nscd">
 | 
|---|
| 551 |         <term><command>nscd</command></term>
 | 
|---|
| 552 |         <listitem>
 | 
|---|
| 553 |           <para>A daemon that provides a cache for the most common name
 | 
|---|
| 554 |           service requests</para>
 | 
|---|
| 555 |           <indexterm zone="ch-system-glibc nscd">
 | 
|---|
| 556 |             <primary sortas="b-nscd">nscd</primary>
 | 
|---|
| 557 |           </indexterm>
 | 
|---|
| 558 |         </listitem>
 | 
|---|
| 559 |       </varlistentry>
 | 
|---|
| 560 | 
 | 
|---|
| 561 |       <varlistentry id="pcprofiledump">
 | 
|---|
| 562 |         <term><command>pcprofiledump</command></term>
 | 
|---|
| 563 |         <listitem>
 | 
|---|
| 564 |           <para>Dumps information generated by PC profiling</para>
 | 
|---|
| 565 |           <indexterm zone="ch-system-glibc pcprofiledump">
 | 
|---|
| 566 |             <primary sortas="b-pcprofiledump">pcprofiledump</primary>
 | 
|---|
| 567 |           </indexterm>
 | 
|---|
| 568 |         </listitem>
 | 
|---|
| 569 |       </varlistentry>
 | 
|---|
| 570 | 
 | 
|---|
| 571 |       <varlistentry id="pldd">
 | 
|---|
| 572 |         <term><command>pldd</command></term>
 | 
|---|
| 573 |         <listitem>
 | 
|---|
| 574 |           <para>Lists dynamic shared objects used by running processes</para>
 | 
|---|
| 575 |           <indexterm zone="ch-system-glibc pldd">
 | 
|---|
| 576 |             <primary sortas="b-pldd">pldd</primary>
 | 
|---|
| 577 |           </indexterm>
 | 
|---|
| 578 |         </listitem>
 | 
|---|
| 579 |       </varlistentry>
 | 
|---|
| 580 | 
 | 
|---|
| 581 |       <varlistentry id="rpcgen">
 | 
|---|
| 582 |         <term><command>rpcgen</command></term>
 | 
|---|
| 583 |         <listitem>
 | 
|---|
| 584 |           <para>Generates C code to implement the Remote Procecure Call (RPC)
 | 
|---|
| 585 |           protocol</para>
 | 
|---|
| 586 |           <indexterm zone="ch-system-glibc rpcgen">
 | 
|---|
| 587 |             <primary sortas="b-rpcgen">rpcgen</primary>
 | 
|---|
| 588 |           </indexterm>
 | 
|---|
| 589 |         </listitem>
 | 
|---|
| 590 |       </varlistentry>
 | 
|---|
| 591 | 
 | 
|---|
| 592 |       <varlistentry id="sln">
 | 
|---|
| 593 |         <term><command>sln</command></term>
 | 
|---|
| 594 |         <listitem>
 | 
|---|
| 595 |           <para>A statically linked program that creates symbolic links</para>
 | 
|---|
| 596 |           <indexterm zone="ch-system-glibc sln">
 | 
|---|
| 597 |             <primary sortas="b-sln">sln</primary>
 | 
|---|
| 598 |           </indexterm>
 | 
|---|
| 599 |         </listitem>
 | 
|---|
| 600 |       </varlistentry>
 | 
|---|
| 601 | 
 | 
|---|
| 602 |       <varlistentry id="sotruss">
 | 
|---|
| 603 |         <term><command>sotruss</command></term>
 | 
|---|
| 604 |         <listitem>
 | 
|---|
| 605 |           <para>Traces shared library procedure calls of a specified command</para>
 | 
|---|
| 606 |           <indexterm zone="ch-system-glibc sotruss">
 | 
|---|
| 607 |             <primary sortas="b-sotruss">sotruss</primary>
 | 
|---|
| 608 |           </indexterm>
 | 
|---|
| 609 |         </listitem>
 | 
|---|
| 610 |       </varlistentry>
 | 
|---|
| 611 | 
 | 
|---|
| 612 |       <varlistentry id="sprof">
 | 
|---|
| 613 |         <term><command>sprof</command></term>
 | 
|---|
| 614 |         <listitem>
 | 
|---|
| 615 |           <para>Reads and displays shared object profiling data</para>
 | 
|---|
| 616 |           <indexterm zone="ch-system-glibc sprof">
 | 
|---|
| 617 |             <primary sortas="b-sprof">sprof</primary>
 | 
|---|
| 618 |           </indexterm>
 | 
|---|
| 619 |         </listitem>
 | 
|---|
| 620 |       </varlistentry>
 | 
|---|
| 621 | 
 | 
|---|
| 622 |       <varlistentry id="tzselect">
 | 
|---|
| 623 |         <term><command>tzselect</command></term>
 | 
|---|
| 624 |         <listitem>
 | 
|---|
| 625 |           <para>Asks the user about the location of the
 | 
|---|
| 626 |           system and reports the corresponding time zone description</para>
 | 
|---|
| 627 |           <indexterm zone="ch-system-glibc tzselect">
 | 
|---|
| 628 |             <primary sortas="b-tzselect">tzselect</primary>
 | 
|---|
| 629 |           </indexterm>
 | 
|---|
| 630 |         </listitem>
 | 
|---|
| 631 |       </varlistentry>
 | 
|---|
| 632 | 
 | 
|---|
| 633 |       <varlistentry id="xtrace">
 | 
|---|
| 634 |         <term><command>xtrace</command></term>
 | 
|---|
| 635 |         <listitem>
 | 
|---|
| 636 |           <para>Traces the execution of a program by
 | 
|---|
| 637 |           printing the currently executed function</para>
 | 
|---|
| 638 |           <indexterm zone="ch-system-glibc xtrace">
 | 
|---|
| 639 |             <primary sortas="b-xtrace">xtrace</primary>
 | 
|---|
| 640 |           </indexterm>
 | 
|---|
| 641 |         </listitem>
 | 
|---|
| 642 |       </varlistentry>
 | 
|---|
| 643 | 
 | 
|---|
| 644 |       <varlistentry id="zdump">
 | 
|---|
| 645 |         <term><command>zdump</command></term>
 | 
|---|
| 646 |         <listitem>
 | 
|---|
| 647 |           <para>The time zone dumper</para>
 | 
|---|
| 648 |           <indexterm zone="ch-system-glibc zdump">
 | 
|---|
| 649 |             <primary sortas="b-zdump">zdump</primary>
 | 
|---|
| 650 |           </indexterm>
 | 
|---|
| 651 |         </listitem>
 | 
|---|
| 652 |       </varlistentry>
 | 
|---|
| 653 | 
 | 
|---|
| 654 |       <varlistentry id="zic">
 | 
|---|
| 655 |         <term><command>zic</command></term>
 | 
|---|
| 656 |         <listitem>
 | 
|---|
| 657 |           <para>The time zone compiler</para>
 | 
|---|
| 658 |           <indexterm zone="ch-system-glibc zic">
 | 
|---|
| 659 |             <primary sortas="b-zic">zic</primary>
 | 
|---|
| 660 |           </indexterm>
 | 
|---|
| 661 |         </listitem>
 | 
|---|
| 662 |       </varlistentry>
 | 
|---|
| 663 | 
 | 
|---|
| 664 |       <varlistentry id="ld.so">
 | 
|---|
| 665 |         <term><filename class="libraryfile">ld.so</filename></term>
 | 
|---|
| 666 |         <listitem>
 | 
|---|
| 667 |           <para>The helper program for shared library executables</para>
 | 
|---|
| 668 |           <indexterm zone="ch-system-glibc ld.so">
 | 
|---|
| 669 |             <primary sortas="c-ld.so">ld.so</primary>
 | 
|---|
| 670 |           </indexterm>
 | 
|---|
| 671 |         </listitem>
 | 
|---|
| 672 |       </varlistentry>
 | 
|---|
| 673 | 
 | 
|---|
| 674 |       <varlistentry id="libBrokenLocale">
 | 
|---|
| 675 |         <term><filename class="libraryfile">libBrokenLocale</filename></term>
 | 
|---|
| 676 |         <listitem>
 | 
|---|
| 677 |           <para>Used by programs, such as Mozilla, to solve broken locales</para>
 | 
|---|
| 678 |           <indexterm zone="ch-system-glibc libBrokenLocale">
 | 
|---|
| 679 |             <primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
 | 
|---|
| 680 |           </indexterm>
 | 
|---|
| 681 |         </listitem>
 | 
|---|
| 682 |       </varlistentry>
 | 
|---|
| 683 | 
 | 
|---|
| 684 |       <varlistentry id="libSegFault">
 | 
|---|
| 685 |         <term><filename class="libraryfile">libSegFault</filename></term>
 | 
|---|
| 686 |         <listitem>
 | 
|---|
| 687 |           <para>The segmentation fault signal handler</para>
 | 
|---|
| 688 |           <indexterm zone="ch-system-glibc libSegFault">
 | 
|---|
| 689 |             <primary sortas="c-libSegFault">libSegFault</primary>
 | 
|---|
| 690 |           </indexterm>
 | 
|---|
| 691 |         </listitem>
 | 
|---|
| 692 |       </varlistentry>
 | 
|---|
| 693 | 
 | 
|---|
| 694 |       <varlistentry id="libanl">
 | 
|---|
| 695 |         <term><filename class="libraryfile">libanl</filename></term>
 | 
|---|
| 696 |         <listitem>
 | 
|---|
| 697 |           <para>An asynchronous name lookup library</para>
 | 
|---|
| 698 |           <indexterm zone="ch-system-glibc libanl">
 | 
|---|
| 699 |             <primary sortas="c-libanl">libanl</primary>
 | 
|---|
| 700 |           </indexterm>
 | 
|---|
| 701 |         </listitem>
 | 
|---|
| 702 |       </varlistentry>
 | 
|---|
| 703 | 
 | 
|---|
| 704 |       <varlistentry id="libc">
 | 
|---|
| 705 |         <term><filename class="libraryfile">libc</filename></term>
 | 
|---|
| 706 |         <listitem>
 | 
|---|
| 707 |           <para>The main C library</para>
 | 
|---|
| 708 |           <indexterm zone="ch-system-glibc libc">
 | 
|---|
| 709 |             <primary sortas="c-libc">libc</primary>
 | 
|---|
| 710 |           </indexterm>
 | 
|---|
| 711 |         </listitem>
 | 
|---|
| 712 |       </varlistentry>
 | 
|---|
| 713 | 
 | 
|---|
| 714 |       <varlistentry id="libcidn">
 | 
|---|
| 715 |         <term><filename class="libraryfile">libcidn</filename></term>
 | 
|---|
| 716 |         <listitem>
 | 
|---|
| 717 |           <para>Used internally by Glibc for handling internationalized domain
 | 
|---|
| 718 |           names in the <function>getaddrinfo()</function> function</para>
 | 
|---|
| 719 |           <indexterm zone="ch-system-glibc libcidn">
 | 
|---|
| 720 |             <primary sortas="c-libcidn">libcidn</primary>
 | 
|---|
| 721 |           </indexterm>
 | 
|---|
| 722 |         </listitem>
 | 
|---|
| 723 |       </varlistentry>
 | 
|---|
| 724 | 
 | 
|---|
| 725 |       <varlistentry id="libcrypt">
 | 
|---|
| 726 |         <term><filename class="libraryfile">libcrypt</filename></term>
 | 
|---|
| 727 |         <listitem>
 | 
|---|
| 728 |           <para>The cryptography library</para>
 | 
|---|
| 729 |           <indexterm zone="ch-system-glibc libcrypt">
 | 
|---|
| 730 |             <primary sortas="c-libcrypt">libcrypt</primary>
 | 
|---|
| 731 |           </indexterm>
 | 
|---|
| 732 |         </listitem>
 | 
|---|
| 733 |       </varlistentry>
 | 
|---|
| 734 | 
 | 
|---|
| 735 |       <varlistentry id="libdl">
 | 
|---|
| 736 |         <term><filename class="libraryfile">libdl</filename></term>
 | 
|---|
| 737 |         <listitem>
 | 
|---|
| 738 |           <para>The dynamic linking interface library</para>
 | 
|---|
| 739 |           <indexterm zone="ch-system-glibc libdl">
 | 
|---|
| 740 |             <primary sortas="c-libdl">libdl</primary>
 | 
|---|
| 741 |           </indexterm>
 | 
|---|
| 742 |         </listitem>
 | 
|---|
| 743 |       </varlistentry>
 | 
|---|
| 744 | 
 | 
|---|
| 745 |       <varlistentry id="libg">
 | 
|---|
| 746 |         <term><filename class="libraryfile">libg</filename></term>
 | 
|---|
| 747 |         <listitem>
 | 
|---|
| 748 |           <para>A runtime library for <command>g++</command></para>
 | 
|---|
| 749 |           <indexterm zone="ch-system-glibc libg">
 | 
|---|
| 750 |             <primary sortas="c-libg">libg</primary>
 | 
|---|
| 751 |           </indexterm>
 | 
|---|
| 752 |         </listitem>
 | 
|---|
| 753 |       </varlistentry>
 | 
|---|
| 754 | 
 | 
|---|
| 755 |       <varlistentry id="libieee">
 | 
|---|
| 756 |         <term><filename class="libraryfile">libieee</filename></term>
 | 
|---|
| 757 |         <listitem>
 | 
|---|
| 758 |           <para>The Institute of Electrical and Electronic Engineers (IEEE)
 | 
|---|
| 759 |           floating point library</para>
 | 
|---|
| 760 |           <indexterm zone="ch-system-glibc libieee">
 | 
|---|
| 761 |             <primary sortas="c-libieee">libieee</primary>
 | 
|---|
| 762 |           </indexterm>
 | 
|---|
| 763 |         </listitem>
 | 
|---|
| 764 |       </varlistentry>
 | 
|---|
| 765 | 
 | 
|---|
| 766 |       <varlistentry id="libm">
 | 
|---|
| 767 |         <term><filename class="libraryfile">libm</filename></term>
 | 
|---|
| 768 |         <listitem>
 | 
|---|
| 769 |           <para>The mathematical library</para>
 | 
|---|
| 770 |           <indexterm zone="ch-system-glibc libm">
 | 
|---|
| 771 |             <primary sortas="c-libm">libm</primary>
 | 
|---|
| 772 |           </indexterm>
 | 
|---|
| 773 |         </listitem>
 | 
|---|
| 774 |       </varlistentry>
 | 
|---|
| 775 | 
 | 
|---|
| 776 |       <varlistentry id="libmcheck">
 | 
|---|
| 777 |         <term><filename class="libraryfile">libmcheck</filename></term>
 | 
|---|
| 778 |         <listitem>
 | 
|---|
| 779 |           <para>Contains code run at boot</para>
 | 
|---|
| 780 |           <indexterm zone="ch-system-glibc libmcheck">
 | 
|---|
| 781 |             <primary sortas="c-libmcheck">libmcheck</primary>
 | 
|---|
| 782 |           </indexterm>
 | 
|---|
| 783 |         </listitem>
 | 
|---|
| 784 |       </varlistentry>
 | 
|---|
| 785 | 
 | 
|---|
| 786 |       <varlistentry id="libmemusage">
 | 
|---|
| 787 |         <term><filename class="libraryfile">libmemusage</filename></term>
 | 
|---|
| 788 |         <listitem>
 | 
|---|
| 789 |           <para>Used by <command>memusage</command> (included in Glibc, but
 | 
|---|
| 790 |           not built in a base CLFS system as it has additional dependencies)
 | 
|---|
| 791 |           to help collect information about the memory usage of a program</para>
 | 
|---|
| 792 |           <indexterm zone="ch-system-glibc libmemusage">
 | 
|---|
| 793 |             <primary sortas="c-libmemusage">libmemusage</primary>
 | 
|---|
| 794 |           </indexterm>
 | 
|---|
| 795 |         </listitem>
 | 
|---|
| 796 |       </varlistentry>
 | 
|---|
| 797 | 
 | 
|---|
| 798 |       <varlistentry id="libnsl">
 | 
|---|
| 799 |         <term><filename class="libraryfile">libnsl</filename></term>
 | 
|---|
| 800 |         <listitem>
 | 
|---|
| 801 |           <para>The network services library</para>
 | 
|---|
| 802 |           <indexterm zone="ch-system-glibc libnsl">
 | 
|---|
| 803 |             <primary sortas="c-libnsl">libnsl</primary>
 | 
|---|
| 804 |           </indexterm>
 | 
|---|
| 805 |         </listitem>
 | 
|---|
| 806 |       </varlistentry>
 | 
|---|
| 807 | 
 | 
|---|
| 808 |       <varlistentry id="libnss">
 | 
|---|
| 809 |         <term><filename class="libraryfile">libnss</filename></term>
 | 
|---|
| 810 |         <listitem>
 | 
|---|
| 811 |           <para>The Name Service Switch libraries, containing functions for
 | 
|---|
| 812 |           resolving host names, user names, group names, aliases, services,
 | 
|---|
| 813 |           protocols, etc.</para>
 | 
|---|
| 814 |           <indexterm zone="ch-system-glibc libnss">
 | 
|---|
| 815 |             <primary sortas="c-libnss">libnss</primary>
 | 
|---|
| 816 |           </indexterm>
 | 
|---|
| 817 |         </listitem>
 | 
|---|
| 818 |       </varlistentry>
 | 
|---|
| 819 | 
 | 
|---|
| 820 |       <varlistentry id="libpcprofile">
 | 
|---|
| 821 |         <term><filename class="libraryfile">libpcprofile</filename></term>
 | 
|---|
| 822 |         <listitem>
 | 
|---|
| 823 |           <para>Contains profiling functions used to track the amount of CPU
 | 
|---|
| 824 |           time spent in specific source code lines</para>
 | 
|---|
| 825 |           <indexterm zone="ch-system-glibc libpcprofile">
 | 
|---|
| 826 |             <primary sortas="c-libpcprofile">libpcprofile</primary>
 | 
|---|
| 827 |           </indexterm>
 | 
|---|
| 828 |         </listitem>
 | 
|---|
| 829 |       </varlistentry>
 | 
|---|
| 830 | 
 | 
|---|
| 831 |       <varlistentry id="libpthread">
 | 
|---|
| 832 |         <term><filename class="libraryfile">libpthread</filename></term>
 | 
|---|
| 833 |         <listitem>
 | 
|---|
| 834 |           <para>The POSIX threads library</para>
 | 
|---|
| 835 |           <indexterm zone="ch-system-glibc libpthread">
 | 
|---|
| 836 |             <primary sortas="c-libpthread">libpthread</primary>
 | 
|---|
| 837 |           </indexterm>
 | 
|---|
| 838 |         </listitem>
 | 
|---|
| 839 |       </varlistentry>
 | 
|---|
| 840 | 
 | 
|---|
| 841 |       <varlistentry id="libresolv">
 | 
|---|
| 842 |         <term><filename class="libraryfile">libresolv</filename></term>
 | 
|---|
| 843 |         <listitem>
 | 
|---|
| 844 |           <para>Contains functions for creating, sending, and interpreting
 | 
|---|
| 845 |           packets to the Internet domain name servers</para>
 | 
|---|
| 846 |           <indexterm zone="ch-system-glibc libresolv">
 | 
|---|
| 847 |             <primary sortas="c-libresolv">libresolv</primary>
 | 
|---|
| 848 |           </indexterm>
 | 
|---|
| 849 |         </listitem>
 | 
|---|
| 850 |       </varlistentry>
 | 
|---|
| 851 | 
 | 
|---|
| 852 |       <varlistentry id="librpcsvc">
 | 
|---|
| 853 |         <term><filename class="libraryfile">librpcsvc</filename></term>
 | 
|---|
| 854 |         <listitem>
 | 
|---|
| 855 |           <para>Contains functions providing miscellaneous RPC services</para>
 | 
|---|
| 856 |           <indexterm zone="ch-system-glibc librpcsvc">
 | 
|---|
| 857 |             <primary sortas="c-librpcsvc">librpcsvc</primary>
 | 
|---|
| 858 |           </indexterm>
 | 
|---|
| 859 |         </listitem>
 | 
|---|
| 860 |       </varlistentry>
 | 
|---|
| 861 | 
 | 
|---|
| 862 |       <varlistentry id="librt">
 | 
|---|
| 863 |         <term><filename class="libraryfile">librt</filename></term>
 | 
|---|
| 864 |         <listitem>
 | 
|---|
| 865 |           <para>Contains functions providing most of the interfaces specified by
 | 
|---|
| 866 |           the POSIX.1b Realtime Extension</para>
 | 
|---|
| 867 |           <indexterm zone="ch-system-glibc librt">
 | 
|---|
| 868 |             <primary sortas="c-librt">librt</primary>
 | 
|---|
| 869 |           </indexterm>
 | 
|---|
| 870 |         </listitem>
 | 
|---|
| 871 |       </varlistentry>
 | 
|---|
| 872 | 
 | 
|---|
| 873 |       <varlistentry id="libthread_db">
 | 
|---|
| 874 |         <term><filename class="libraryfile">libthread_db</filename></term>
 | 
|---|
| 875 |         <listitem>
 | 
|---|
| 876 |           <para>Contains functions useful for
 | 
|---|
| 877 |           building debuggers for multi-threaded programs</para>
 | 
|---|
| 878 |           <indexterm zone="ch-system-glibc libthread_db">
 | 
|---|
| 879 |             <primary sortas="c-libthread_db">libthread_db</primary>
 | 
|---|
| 880 |           </indexterm>
 | 
|---|
| 881 |         </listitem>
 | 
|---|
| 882 |       </varlistentry>
 | 
|---|
| 883 | 
 | 
|---|
| 884 |       <varlistentry id="libutil">
 | 
|---|
| 885 |         <term><filename class="libraryfile">libutil</filename></term>
 | 
|---|
| 886 |         <listitem>
 | 
|---|
| 887 |           <para>Contains code for <quote>standard</quote> functions used in
 | 
|---|
| 888 |           many different Unix utilities</para>
 | 
|---|
| 889 |           <indexterm zone="ch-system-glibc libutil">
 | 
|---|
| 890 |             <primary sortas="c-libutil">libutil</primary>
 | 
|---|
| 891 |           </indexterm>
 | 
|---|
| 892 |         </listitem>
 | 
|---|
| 893 |       </varlistentry>
 | 
|---|
| 894 | 
 | 
|---|
| 895 |     </variablelist>
 | 
|---|
| 896 | 
 | 
|---|
| 897 |   </sect2>
 | 
|---|
| 898 | 
 | 
|---|
| 899 | </sect1>
 | 
|---|