[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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| 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 4 | %general-entities;
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| 5 | ]>
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[a001133] | 6 | <sect1 id="ch-system-glibc" xreflabel="Glibc" role="wrap">
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[673b0d8] | 7 | <title>Glibc-&glibc-version;</title>
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| 8 | <?dbhtml filename="glibc.html"?>
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| 9 |
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| 10 | <indexterm zone="ch-system-glibc"><primary sortas="a-Glibc">Glibc</primary></indexterm>
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[6370fa6] | 11 |
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[a001133] | 12 | <sect2 role="package"><title/>
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[5888299] | 13 | <para>The Glibc package contains the main C library. This library provides all
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| 14 | the basic routines for allocating memory, searching directories, opening and
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| 15 | closing files, reading and writing them, string handling, pattern matching,
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| 16 | arithmetic, and so on.</para>
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| 17 |
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[a001133] | 18 | <segmentedlist>
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| 19 | <segtitle>&buildtime;</segtitle>
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| 20 | <segtitle>&diskspace;</segtitle>
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| 21 | <seglistitem><seg>12.3 SBU</seg><seg>784 MB</seg></seglistitem>
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| 22 | </segmentedlist>
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[673b0d8] | 23 |
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[a001133] | 24 | <segmentedlist>
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| 25 | <segtitle>Glibc installation depends on</segtitle>
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| 26 | <seglistitem><seg>Bash, Binutils, Coreutils, Diffutils,
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| 27 | Gawk, GCC, Gettext, Grep, Make, Perl, Sed, Texinfo</seg></seglistitem>
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| 28 | </segmentedlist>
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| 29 | </sect2>
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[3554fa3a] | 30 |
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[a001133] | 31 | <sect2 role="installation">
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[5888299] | 32 | <title>Installation of Glibc</title>
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[73aedd1d] | 33 |
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| 34 | <para>The Glibc build system is very well self-contained and will install
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| 35 | perfectly, even though our compiler specs file and linker are still pointing
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[bb55064] | 36 | at <filename class="directory">/tools</filename>. We cannot adjust the specs and linker before
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[73aedd1d] | 37 | the Glibc install, because the Glibc autoconf tests would then give bogus
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| 38 | results and thus defeat our goal of achieving a clean build.</para>
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| 39 |
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[d0a6c4c] | 40 | <para>Before starting to build Glibc, remember to unset any environment
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| 41 | variables that override the default optimization flags.</para>
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[73aedd1d] | 42 |
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| 43 | <para>The Glibc documentation recommends building Glibc outside of the source
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| 44 | directory in a dedicated build directory:</para>
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| 45 |
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| 46 | <screen><userinput>mkdir ../glibc-build
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| 47 | cd ../glibc-build</userinput></screen>
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| 48 |
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| 49 | <para>Now prepare Glibc for compilation:</para>
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| 50 |
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[9dfc02f] | 51 | <screen><userinput>../glibc-&glibc-version;/configure --prefix=/usr \
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| 52 | --disable-profile --enable-add-ons=nptl --with-tls \
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[7e2b777] | 53 | --with-__thread --enable-kernel=2.6.0 --without-cvs \
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[4b5f332] | 54 | --libexecdir=/usr/lib/glibc \
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[9dfc02f] | 55 | --with-headers=/tools/glibc-kernheaders</userinput></screen>
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[73aedd1d] | 56 |
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[4b5f332] | 57 | <para>The meaning of the new configure options:</para>
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| 58 |
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| 59 | <variablelist>
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| 60 | <varlistentry>
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| 61 | <term><parameter>--libexecdir=/usr/lib/glibc</parameter></term>
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| 62 | <listitem><para>This changes the location of the <command>pt_chown</command>
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| 63 | program from its default of <filename class="directory">/usr/libexec</filename> to
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| 64 | <filename class="directory">/usr/lib/glibc</filename>.</para></listitem>
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| 65 | </varlistentry>
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| 66 | </variablelist>
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| 67 |
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[73aedd1d] | 68 | <para>Compile the package:</para>
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| 69 |
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| 70 | <screen><userinput>make</userinput></screen>
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| 71 |
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[90afe40d] | 72 | <important><para>The test suite for Glibc in this section is considered
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| 73 | <emphasis>critical</emphasis>. Our advice is to not skip it under any
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| 74 | circumstance.</para></important>
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| 75 |
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[73aedd1d] | 76 | <para>Test the results:</para>
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| 77 |
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| 78 | <screen><userinput>make check</userinput></screen>
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| 79 |
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[d878ce3] | 80 | <para>The Glibc test suite is highly dependent on certain functions of your host
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| 81 | system, in particular the kernel. In general, the Glibc test suite is always
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| 82 | expected to pass. However, in certain circumstances some failures are
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| 83 | unavoidable. Here is a list of the most common issues we are aware of:</para>
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| 84 |
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| 85 | <itemizedlist>
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| 86 | <listitem><para>The <emphasis>math</emphasis> tests sometimes fail when running
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| 87 | on systems where the CPU is not a relatively new genuine Intel or authentic AMD.
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| 88 | Certain optimization settings are also known to be a factor here.</para></listitem>
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| 89 |
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| 90 | <listitem><para>The <emphasis>gettext</emphasis> test sometimes fails due to
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| 91 | host system issues. The exact reasons are not yet clear.</para></listitem>
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| 92 |
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| 93 | <listitem><para>The <emphasis>atime</emphasis> test sometimes fails when the
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| 94 | LFS partition is mounted with the <parameter>noatime</parameter> option, or due
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| 95 | to other file system quirks.</para></listitem>
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| 96 |
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| 97 | <listitem><para>The <emphasis>shm</emphasis> test might fail when the host
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| 98 | system is running the devfs file system but doesn't have the <systemitem class="filesystem">tmpfs</systemitem> file system
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| 99 | mounted at <filename class="directory">/dev/shm</filename> due to lack of support for tmpfs in
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| 100 | the kernel.</para></listitem>
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| 101 |
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| 102 | <listitem><para>When running on older and slower hardware, some tests might
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| 103 | fail due to test timeouts being exceeded.</para></listitem>
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| 104 | </itemizedlist>
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[73aedd1d] | 105 |
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[1caa48e] | 106 | <para>Though it is a harmless message, the install stage of Glibc will
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| 107 | complain about the absence of <filename>/etc/ld.so.conf</filename>. Fix this
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| 108 | annoying little warning with:</para>
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| 109 |
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| 110 | <screen><userinput>touch /etc/ld.so.conf</userinput></screen>
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| 111 |
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[73aedd1d] | 112 | <para>And install the package:</para>
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| 113 |
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| 114 | <screen><userinput>make install</userinput></screen>
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| 115 |
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| 116 | <para>The locales that can make your system respond in a different language
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| 117 | weren't installed by the above command. Do it with this:</para>
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| 118 |
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| 119 | <screen><userinput>make localedata/install-locales</userinput></screen>
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| 120 |
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| 121 | <para>An alternative to running the previous command is to install only those
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[d0a6c4c] | 122 | locales which you need or want. This can be achieved by using the
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[90e3cb3] | 123 | <command>localedef</command> command. Information on this can be found in
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[d0a6c4c] | 124 | the <filename>INSTALL</filename> file in the Glibc source. However, there are
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| 125 | a number of locales that are essential for the tests of future packages to
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| 126 | pass, in particular, the <emphasis>libstdc++</emphasis> tests from GCC. The
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| 127 | following instructions, instead of the install-locales target above, will
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| 128 | install the minimum set of locales necessary for the tests to run
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| 129 | successfully:</para>
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[73aedd1d] | 130 |
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| 131 | <screen><userinput>mkdir -p /usr/lib/locale
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| 132 | localedef -i de_DE -f ISO-8859-1 de_DE
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| 133 | localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
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| 134 | localedef -i en_HK -f ISO-8859-1 en_HK
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| 135 | localedef -i en_PH -f ISO-8859-1 en_PH
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| 136 | localedef -i en_US -f ISO-8859-1 en_US
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| 137 | localedef -i es_MX -f ISO-8859-1 es_MX
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[673b0d8] | 138 | localedef -i fa_IR -f UTF-8 fa_IR
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[73aedd1d] | 139 | localedef -i fr_FR -f ISO-8859-1 fr_FR
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| 140 | localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
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| 141 | localedef -i it_IT -f ISO-8859-1 it_IT
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| 142 | localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen>
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| 143 |
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[b32e803] | 144 | <para>In fact, some locales installed by the
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| 145 | <command>make localedata/install-locales</command>
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| 146 | command above are not properly
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| 147 | supported by some applications that are in LFS and BLFS books. Because
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| 148 | of various problems that arise
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| 149 | due to application programmers making
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| 150 | assumptions that break in such locales, LFS <emphasis>should not</emphasis>
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| 151 | be used in locales that utilize
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| 152 | multibyte character sets (including UTF-8) or
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| 153 | right-to-left writing order.
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| 154 | Numerous unofficial and unstable patches are required to fix these problems,
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| 155 | and it has been decided not to support such complex locales.
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| 156 | This applies to the ja_JP and fa_IR locales as well:
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| 157 | they have been installed only
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[bb55064] | 158 | for GCC and Gettext tests to pass, and e.g.
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[e4bf4c7] | 159 | the <command>watch</command> program (part of Procps)
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[b32e803] | 160 | compiled according to this book doesn't work properly in them.
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| 161 | Various attempts to circumvent these
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| 162 | restrictions are documented in internationalization-related hints.</para>
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| 163 |
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[9dfc02f] | 164 | <para>Finally, build the linuxthreads man pages, which are a great reference
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| 165 | on the threading API (applicable to NPTL as well):</para>
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[73aedd1d] | 166 |
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[9dfc02f] | 167 | <screen><userinput>make -C ../glibc-&glibc-version;/linuxthreads/man</userinput></screen>
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[73aedd1d] | 168 |
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| 169 | <para>And install these pages:</para>
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| 170 |
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[9dfc02f] | 171 | <screen><userinput>make -C ../glibc-&glibc-version;/linuxthreads/man install</userinput></screen>
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[73aedd1d] | 172 |
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| 173 | </sect2>
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[5888299] | 174 |
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[342b176] | 175 |
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[8c16bf7] | 176 | <sect2 id="conf-glibc" role="configuration"><title>Configuring Glibc</title>
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[673b0d8] | 177 | <indexterm zone="conf-glibc"><primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary></indexterm>
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| 178 | <indexterm zone="conf-glibc"><primary sortas="e-/etc/localtime">/etc/localtime</primary></indexterm>
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[342b176] | 179 |
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| 180 | <para>We need to create the <filename>/etc/nsswitch.conf</filename> file,
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| 181 | because, although Glibc provides defaults when this file is missing or corrupt,
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| 182 | the Glibc defaults don't work well with networking. Also, our time zone needs
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| 183 | to be set up.</para>
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| 184 |
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| 185 | <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running the
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| 186 | following:</para>
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| 187 |
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[bb55064] | 188 | <screen><userinput>cat > /etc/nsswitch.conf << "EOF"
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[342b176] | 189 | # Begin /etc/nsswitch.conf
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| 190 |
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| 191 | passwd: files
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| 192 | group: files
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| 193 | shadow: files
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| 194 |
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| 195 | hosts: files dns
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| 196 | networks: files
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| 197 |
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[4a80bec] | 198 | protocols: files
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| 199 | services: files
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| 200 | ethers: files
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| 201 | rpc: files
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[342b176] | 202 |
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| 203 | # End /etc/nsswitch.conf
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[bb55064] | 204 | EOF</userinput></screen>
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[342b176] | 205 |
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| 206 | <para>To find out what time zone you're in, run the following script:</para>
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| 207 |
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| 208 | <screen><userinput>tzselect</userinput></screen>
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| 209 |
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| 210 | <para>When you've answered a few questions about your location, the script will
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| 211 | output the name of your time zone, something like <emphasis>EST5EDT</emphasis>
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| 212 | or <emphasis>Canada/Eastern</emphasis>. Then create the
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| 213 | <filename>/etc/localtime</filename> file by running:</para>
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| 214 |
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| 215 | <screen><userinput>cp --remove-destination /usr/share/zoneinfo/Canada/Eastern /etc/localtime</userinput></screen>
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| 216 |
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| 217 | <para>The meaning of the option:</para>
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| 218 |
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[b8a819f] | 219 | <variablelist>
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| 220 | <varlistentry>
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[bb55064] | 221 | <term><parameter>--remove-destination</parameter></term>
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[b8a819f] | 222 | <listitem><para>This is needed to force removal of the already existing symbolic
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| 223 | link. The reason why we copy instead of symlink is to cover the situation where
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[bb55064] | 224 | <filename class="directory">/usr</filename> is on a separate partition. This could matter, for
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[b8a819f] | 225 | example, when booted into single user mode.</para></listitem>
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| 226 | </varlistentry>
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| 227 | </variablelist>
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[342b176] | 228 |
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| 229 | <para>Of course, instead of <emphasis>Canada/Eastern</emphasis>, fill in
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| 230 | the name of the time zone that the <command>tzselect</command> script
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| 231 | gave you.</para>
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| 232 |
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| 233 | </sect2>
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| 234 |
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| 235 |
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[8c16bf7] | 236 | <sect2 id="conf-ld" role="configuration">
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[342b176] | 237 | <title>Configuring Dynamic Loader</title>
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[673b0d8] | 238 | <indexterm zone="conf-ld"><primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary></indexterm>
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[342b176] | 239 |
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| 240 | <para>By default, the dynamic loader
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[bb55064] | 241 | (<filename class="libraryfile">/lib/ld-linux.so.2</filename>) searches through <filename
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[673b0d8] | 242 | class="directory">/lib</filename> and <filename class="directory">/usr/lib</filename>
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| 243 | for dynamic libraries that are needed
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[342b176] | 244 | by programs when you run them. However, if there are libraries in
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| 245 | directories other than <filename class="directory">/lib</filename> and
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| 246 | <filename class="directory">/usr/lib</filename>, you need to add them to
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| 247 | the <filename>/etc/ld.so.conf</filename> file for the dynamic
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| 248 | loader to find them. Two directories that are commonly known to contain
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[673b0d8] | 249 | additional libraries are <filename class="directory">/usr/local/lib</filename>
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| 250 | and <filename class="directory">/opt/lib</filename>, so we add those directories to the
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[342b176] | 251 | dynamic loader's search path.</para>
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| 252 |
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| 253 | <para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
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| 254 | following:</para>
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| 255 |
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[bb55064] | 256 | <screen><userinput>cat > /etc/ld.so.conf << "EOF"
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[342b176] | 257 | # Begin /etc/ld.so.conf
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| 258 |
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| 259 | /usr/local/lib
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| 260 | /opt/lib
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| 261 |
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| 262 | # End /etc/ld.so.conf
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[bb55064] | 263 | EOF</userinput></screen>
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[342b176] | 264 |
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| 265 | </sect2>
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[5888299] | 266 |
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| 267 |
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[c6cb3aa] | 268 | <sect2 id="contents-glibc" role="content"><title>Contents of Glibc</title>
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[673b0d8] | 269 |
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[c6cb3aa] | 270 | <segmentedlist>
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| 271 | <segtitle>Installed programs</segtitle>
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| 272 | <segtitle>Installed libraries</segtitle>
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| 273 | <seglistitem><seg>catchsegv, gencat, getconf,
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[673b0d8] | 274 | getent, glibcbug, iconv, iconvconfig, ldconfig, ldd, lddlibc4, locale,
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| 275 | localedef, mtrace, nscd, nscd_nischeck, pcprofiledump, pt_chown, rpcgen,
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[c6cb3aa] | 276 | rpcinfo, sln, sprof, tzselect, xtrace, zdump and zic</seg>
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| 277 | <seg>ld.so, libBrokenLocale.[a,so],
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[673b0d8] | 278 | libSegFault.so, libanl.[a,so], libbsd-compat.a, libc.[a,so], libc_nonshared.a,
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| 279 | libcrypt.[a,so], libdl.[a,so], libg.a, libieee.a, libm.[a,so], libmcheck.a,
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| 280 | libmemusage.so, libnsl.a, libnss_compat.so, libnss_dns.so, libnss_files.so,
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| 281 | libnss_hesiod.so, libnss_nis.so, libnss_nisplus.so, libpcprofile.so,
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| 282 | libpthread.[a,so], libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so
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[c6cb3aa] | 283 | and libutil.[a,so]</seg></seglistitem>
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| 284 | </segmentedlist>
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[673b0d8] | 285 |
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[c6cb3aa] | 286 | <variablelist><title>Short descriptions</title>
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[673b0d8] | 287 |
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[b8a819f] | 288 | <varlistentry id="catchsegv">
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| 289 | <term><command>catchsegv</command></term>
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[c6cb3aa] | 290 | <listitem>
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[673b0d8] | 291 | <indexterm zone="ch-system-glibc catchsegv"><primary sortas="b-catchsegv">catchsegv</primary></indexterm>
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[c6cb3aa] | 292 | <para>can be used to create a stack trace
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[673b0d8] | 293 | when a program terminates with a segmentation fault.</para>
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[c6cb3aa] | 294 | </listitem>
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| 295 | </varlistentry>
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[673b0d8] | 296 |
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[b8a819f] | 297 | <varlistentry id="gencat">
|
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| 298 | <term><command>gencat</command></term>
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[c6cb3aa] | 299 | <listitem>
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[673b0d8] | 300 | <indexterm zone="ch-system-glibc gencat"><primary sortas="b-gencat">gencat</primary></indexterm>
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[c6cb3aa] | 301 | <para>generates message catalogues.</para>
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| 302 | </listitem>
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| 303 | </varlistentry>
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[673b0d8] | 304 |
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[b8a819f] | 305 | <varlistentry id="getconf">
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| 306 | <term><command>getconf</command></term>
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[c6cb3aa] | 307 | <listitem>
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[673b0d8] | 308 | <indexterm zone="ch-system-glibc getconf"><primary sortas="b-getconf">getconf</primary></indexterm>
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[c6cb3aa] | 309 | <para>displays the system configuration values for file system specific variables.</para>
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| 310 | </listitem>
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| 311 | </varlistentry>
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[673b0d8] | 312 |
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[b8a819f] | 313 | <varlistentry id="getent">
|
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| 314 | <term><command>getent</command></term>
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[c6cb3aa] | 315 | <listitem>
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[673b0d8] | 316 | <indexterm zone="ch-system-glibc getent"><primary sortas="b-getent">getent</primary></indexterm>
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[c6cb3aa] | 317 | <para>gets entries from an administrative database.</para>
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| 318 | </listitem>
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| 319 | </varlistentry>
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[673b0d8] | 320 |
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[b8a819f] | 321 | <varlistentry id="glibcbug">
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| 322 | <term><command>glibcbug</command></term>
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[c6cb3aa] | 323 | <listitem>
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[673b0d8] | 324 | <indexterm zone="ch-system-glibc glibcbug"><primary sortas="b-glibcbug">glibcbug</primary></indexterm>
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[c6cb3aa] | 325 | <para>creates a bug report and mails it to the bug email address.</para>
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| 326 | </listitem>
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| 327 | </varlistentry>
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[673b0d8] | 328 |
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[b8a819f] | 329 | <varlistentry id="iconv">
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| 330 | <term><command>iconv</command></term>
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[c6cb3aa] | 331 | <listitem>
|
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[673b0d8] | 332 | <indexterm zone="ch-system-glibc iconv"><primary sortas="b-iconv">iconv</primary></indexterm>
|
---|
[c6cb3aa] | 333 | <para>performs character set conversion.</para>
|
---|
| 334 | </listitem>
|
---|
| 335 | </varlistentry>
|
---|
[673b0d8] | 336 |
|
---|
[b8a819f] | 337 | <varlistentry id="iconvconfig">
|
---|
| 338 | <term><command>iconvconfig</command></term>
|
---|
[c6cb3aa] | 339 | <listitem>
|
---|
[673b0d8] | 340 | <indexterm zone="ch-system-glibc iconvconfig"><primary sortas="b-iconvconfig">iconvconfig</primary></indexterm>
|
---|
[bb55064] | 341 | <para>creates fastloading <command>iconv</command> module configuration file.</para>
|
---|
[c6cb3aa] | 342 | </listitem>
|
---|
| 343 | </varlistentry>
|
---|
[673b0d8] | 344 |
|
---|
[b8a819f] | 345 | <varlistentry id="ldconfig">
|
---|
| 346 | <term><command>ldconfig</command></term>
|
---|
[c6cb3aa] | 347 | <listitem>
|
---|
[673b0d8] | 348 | <indexterm zone="ch-system-glibc ldconfig"><primary sortas="b-ldconfig">ldconfig</primary></indexterm>
|
---|
[c6cb3aa] | 349 | <para>configures the dynamic linker runtime bindings.</para>
|
---|
| 350 | </listitem>
|
---|
| 351 | </varlistentry>
|
---|
[673b0d8] | 352 |
|
---|
[b8a819f] | 353 | <varlistentry id="ldd">
|
---|
| 354 | <term><command>ldd</command></term>
|
---|
[c6cb3aa] | 355 | <listitem>
|
---|
[673b0d8] | 356 | <indexterm zone="ch-system-glibc ldd"><primary sortas="b-ldd">ldd</primary></indexterm>
|
---|
[c6cb3aa] | 357 | <para>reports which shared libraries are required
|
---|
[673b0d8] | 358 | by each given program or shared library.</para>
|
---|
[c6cb3aa] | 359 | </listitem>
|
---|
| 360 | </varlistentry>
|
---|
[673b0d8] | 361 |
|
---|
[b8a819f] | 362 | <varlistentry id="lddlibc4">
|
---|
| 363 | <term><command>lddlibc4</command></term>
|
---|
[c6cb3aa] | 364 | <listitem>
|
---|
[673b0d8] | 365 | <indexterm zone="ch-system-glibc lddlibc4"><primary sortas="b-lddlibc4">lddlibc4</primary></indexterm>
|
---|
[bb55064] | 366 | <para>assists <command>ldd</command> with object files.</para>
|
---|
[c6cb3aa] | 367 | </listitem>
|
---|
| 368 | </varlistentry>
|
---|
[673b0d8] | 369 |
|
---|
[b8a819f] | 370 | <varlistentry id="locale">
|
---|
| 371 | <term><command>locale</command></term>
|
---|
[c6cb3aa] | 372 | <listitem>
|
---|
[673b0d8] | 373 | <indexterm zone="ch-system-glibc locale"><primary sortas="b-locale">locale</primary></indexterm>
|
---|
[c6cb3aa] | 374 | <para>is a Perl program that tells the compiler
|
---|
[673b0d8] | 375 | to enable or disable the use of POSIX locales for built-in operations.</para>
|
---|
[c6cb3aa] | 376 | </listitem>
|
---|
| 377 | </varlistentry>
|
---|
[673b0d8] | 378 |
|
---|
[b8a819f] | 379 | <varlistentry id="localedef">
|
---|
| 380 | <term><command>localedef</command></term>
|
---|
[c6cb3aa] | 381 | <listitem>
|
---|
[673b0d8] | 382 | <indexterm zone="ch-system-glibc localedef"><primary sortas="b-localedef">localedef</primary></indexterm>
|
---|
[c6cb3aa] | 383 | <para>compiles locale specifications.</para>
|
---|
| 384 | </listitem>
|
---|
| 385 | </varlistentry>
|
---|
[673b0d8] | 386 |
|
---|
[b8a819f] | 387 | <varlistentry id="mtrace">
|
---|
| 388 | <term><command>mtrace</command></term>
|
---|
[c6cb3aa] | 389 | <listitem>
|
---|
[673b0d8] | 390 | <indexterm zone="ch-system-glibc mtrace"><primary sortas="b-mtrace">mtrace</primary></indexterm>
|
---|
[c6cb3aa] | 391 | <para>...</para>
|
---|
| 392 | </listitem>
|
---|
| 393 | </varlistentry>
|
---|
[673b0d8] | 394 |
|
---|
[b8a819f] | 395 | <varlistentry id="nscd">
|
---|
| 396 | <term><command>nscd</command></term>
|
---|
[c6cb3aa] | 397 | <listitem>
|
---|
[673b0d8] | 398 | <indexterm zone="ch-system-glibc nscd"><primary sortas="b-nscd">nscd</primary></indexterm>
|
---|
[c6cb3aa] | 399 | <para>is a name service cache daemon providing a
|
---|
[673b0d8] | 400 | cache for the most common name service requests.</para>
|
---|
[c6cb3aa] | 401 | </listitem>
|
---|
| 402 | </varlistentry>
|
---|
[673b0d8] | 403 |
|
---|
[b8a819f] | 404 | <varlistentry id="nscd_nischeck">
|
---|
| 405 | <term><command>nscd_nischeck</command></term>
|
---|
[c6cb3aa] | 406 | <listitem>
|
---|
[673b0d8] | 407 | <indexterm zone="ch-system-glibc nscd_nischeck"><primary sortas="b-nscd_nischeck">nscd_nischeck</primary></indexterm>
|
---|
[c6cb3aa] | 408 | <para>checks whether or not secure mode is necessary for NIS+ lookup.</para>
|
---|
| 409 | </listitem>
|
---|
| 410 | </varlistentry>
|
---|
[673b0d8] | 411 |
|
---|
[b8a819f] | 412 | <varlistentry id="pcprofiledump">
|
---|
| 413 | <term><command>pcprofiledump</command></term>
|
---|
[c6cb3aa] | 414 | <listitem>
|
---|
[673b0d8] | 415 | <indexterm zone="ch-system-glibc pcprofiledump"><primary sortas="b-pcprofiledump">pcprofiledump</primary></indexterm>
|
---|
[c6cb3aa] | 416 | <para>dumps information generated by PC profiling.</para>
|
---|
| 417 | </listitem>
|
---|
| 418 | </varlistentry>
|
---|
[673b0d8] | 419 |
|
---|
[b8a819f] | 420 | <varlistentry id="pt_chown">
|
---|
| 421 | <term><command>pt_chown</command></term>
|
---|
[c6cb3aa] | 422 | <listitem>
|
---|
[673b0d8] | 423 | <indexterm zone="ch-system-glibc pt_chown"><primary sortas="b-pt_chown">pt_chown</primary></indexterm>
|
---|
[c6cb3aa] | 424 | <para>is a helper program for grantpt to set
|
---|
[673b0d8] | 425 | the owner, group and access permissions of a slave pseudo terminal.</para>
|
---|
[c6cb3aa] | 426 | </listitem>
|
---|
| 427 | </varlistentry>
|
---|
[673b0d8] | 428 |
|
---|
[b8a819f] | 429 | <varlistentry id="rpcgen">
|
---|
| 430 | <term><command>rpcgen</command></term>
|
---|
[c6cb3aa] | 431 | <listitem>
|
---|
[673b0d8] | 432 | <indexterm zone="ch-system-glibc rpcgen"><primary sortas="b-rpcgen">rpcgen</primary></indexterm>
|
---|
[c6cb3aa] | 433 | <para>generates C code to implement the RPC protocol.</para>
|
---|
| 434 | </listitem>
|
---|
| 435 | </varlistentry>
|
---|
[673b0d8] | 436 |
|
---|
[b8a819f] | 437 | <varlistentry id="rpcinfo">
|
---|
| 438 | <term><command>rpcinfo</command></term>
|
---|
[c6cb3aa] | 439 | <listitem>
|
---|
[673b0d8] | 440 | <indexterm zone="ch-system-glibc rpcinfo"><primary sortas="b-rpcinfo">rpcinfo</primary></indexterm>
|
---|
[c6cb3aa] | 441 | <para>makes an RPC call to an RPC server.</para>
|
---|
| 442 | </listitem>
|
---|
| 443 | </varlistentry>
|
---|
[673b0d8] | 444 |
|
---|
[b8a819f] | 445 | <varlistentry id="sln">
|
---|
| 446 | <term><command>sln</command></term>
|
---|
[c6cb3aa] | 447 | <listitem>
|
---|
[673b0d8] | 448 | <indexterm zone="ch-system-glibc sln"><primary sortas="b-sln">sln</primary></indexterm>
|
---|
[c6cb3aa] | 449 | <para>is used to make symbolic links. The program
|
---|
[673b0d8] | 450 | is statically linked, so it is useful for making symbolic links to dynamic
|
---|
| 451 | libraries if the dynamic linking system for some reason is nonfunctional.</para>
|
---|
[c6cb3aa] | 452 | </listitem>
|
---|
| 453 | </varlistentry>
|
---|
[673b0d8] | 454 |
|
---|
[b8a819f] | 455 | <varlistentry id="sprof">
|
---|
| 456 | <term><command>sprof</command></term>
|
---|
[c6cb3aa] | 457 | <listitem>
|
---|
[673b0d8] | 458 | <indexterm zone="ch-system-glibc sprof"><primary sortas="b-sprof">sprof</primary></indexterm>
|
---|
[c6cb3aa] | 459 | <para>reads and displays shared object profiling data.</para>
|
---|
| 460 | </listitem>
|
---|
| 461 | </varlistentry>
|
---|
[4931dd3] | 462 |
|
---|
[b8a819f] | 463 | <varlistentry id="tzselect">
|
---|
| 464 | <term><command>tzselect</command></term>
|
---|
[c6cb3aa] | 465 | <listitem>
|
---|
[673b0d8] | 466 | <indexterm zone="ch-system-glibc tzselect"><primary sortas="b-tzselect">tzselect</primary></indexterm>
|
---|
[c6cb3aa] | 467 | <para>asks the user about the location of the
|
---|
[673b0d8] | 468 | system and reports the corresponding time zone description.</para>
|
---|
[c6cb3aa] | 469 | </listitem>
|
---|
| 470 | </varlistentry>
|
---|
[673b0d8] | 471 |
|
---|
[b8a819f] | 472 | <varlistentry id="xtrace">
|
---|
| 473 | <term><command>xtrace</command></term>
|
---|
[c6cb3aa] | 474 | <listitem>
|
---|
[673b0d8] | 475 | <indexterm zone="ch-system-glibc xtrace"><primary sortas="b-xtrace">xtrace</primary></indexterm>
|
---|
[c6cb3aa] | 476 | <para>traces the execution of a program by
|
---|
[673b0d8] | 477 | printing the currently executed function.</para>
|
---|
[c6cb3aa] | 478 | </listitem>
|
---|
| 479 | </varlistentry>
|
---|
[673b0d8] | 480 |
|
---|
[b8a819f] | 481 | <varlistentry id="zdump">
|
---|
| 482 | <term><command>zdump</command></term>
|
---|
[c6cb3aa] | 483 | <listitem>
|
---|
[673b0d8] | 484 | <indexterm zone="ch-system-glibc zdump"><primary sortas="b-zdump">zdump</primary></indexterm>
|
---|
[c6cb3aa] | 485 | <para>is the time zone dumper.</para>
|
---|
| 486 | </listitem>
|
---|
| 487 | </varlistentry>
|
---|
[673b0d8] | 488 |
|
---|
[b8a819f] | 489 | <varlistentry id="zic">
|
---|
| 490 | <term><command>zic</command></term>
|
---|
[c6cb3aa] | 491 | <listitem>
|
---|
[673b0d8] | 492 | <indexterm zone="ch-system-glibc zic"><primary sortas="b-zic">zic</primary></indexterm>
|
---|
[c6cb3aa] | 493 | <para>is the time zone compiler.</para>
|
---|
| 494 | </listitem>
|
---|
| 495 | </varlistentry>
|
---|
[673b0d8] | 496 |
|
---|
[b8a819f] | 497 | <varlistentry id="ld.so">
|
---|
[bb55064] | 498 | <term><filename class="libraryfile">ld.so</filename></term>
|
---|
[c6cb3aa] | 499 | <listitem>
|
---|
[673b0d8] | 500 | <indexterm zone="ch-system-glibc ld.so"><primary sortas="c-ld.so">ld.so</primary></indexterm>
|
---|
[c6cb3aa] | 501 | <para>is the helper program for shared library executables.</para>
|
---|
| 502 | </listitem>
|
---|
| 503 | </varlistentry>
|
---|
[673b0d8] | 504 |
|
---|
[b8a819f] | 505 | <varlistentry id="libBrokenLocale">
|
---|
[bb55064] | 506 | <term><filename class="libraryfile">libBrokenLocale</filename></term>
|
---|
[c6cb3aa] | 507 | <listitem>
|
---|
[673b0d8] | 508 | <indexterm zone="ch-system-glibc libBrokenLocale"><primary sortas="c-libBrokenLocale">libBrokenLocale</primary></indexterm>
|
---|
[c6cb3aa] | 509 | <para>is used by programs, such as Mozilla, to solve broken locales.</para>
|
---|
| 510 | </listitem>
|
---|
| 511 | </varlistentry>
|
---|
[673b0d8] | 512 |
|
---|
[b8a819f] | 513 | <varlistentry id="libSegFault">
|
---|
[bb55064] | 514 | <term><filename class="libraryfile">libSegFault</filename></term>
|
---|
[c6cb3aa] | 515 | <listitem>
|
---|
[673b0d8] | 516 | <indexterm zone="ch-system-glibc libSegFault"><primary sortas="c-libSegFault">libSegFault</primary></indexterm>
|
---|
[c6cb3aa] | 517 | <para>is a segmentation fault signal handler. It tries to catch segfaults.</para>
|
---|
| 518 | </listitem>
|
---|
| 519 | </varlistentry>
|
---|
[673b0d8] | 520 |
|
---|
[b8a819f] | 521 | <varlistentry id="libanl">
|
---|
[bb55064] | 522 | <term><filename class="libraryfile">libanl</filename></term>
|
---|
[c6cb3aa] | 523 | <listitem>
|
---|
[673b0d8] | 524 | <indexterm zone="ch-system-glibc libanl"><primary sortas="c-libanl">libanl</primary></indexterm>
|
---|
[c6cb3aa] | 525 | <para>is an asynchronous name lookup library.</para>
|
---|
| 526 | </listitem>
|
---|
| 527 | </varlistentry>
|
---|
[673b0d8] | 528 |
|
---|
[b8a819f] | 529 | <varlistentry id="libbsd-compat">
|
---|
[bb55064] | 530 | <term><filename class="libraryfile">libbsd-compat</filename></term>
|
---|
[c6cb3aa] | 531 | <listitem>
|
---|
[673b0d8] | 532 | <indexterm zone="ch-system-glibc libbsd-compat"><primary sortas="c-libbsd-compat">libbsd-compat</primary></indexterm>
|
---|
[c6cb3aa] | 533 | <para>provides the portability needed
|
---|
[673b0d8] | 534 | in order to run certain BSD programs under Linux.</para>
|
---|
[c6cb3aa] | 535 | </listitem>
|
---|
| 536 | </varlistentry>
|
---|
[673b0d8] | 537 |
|
---|
[b8a819f] | 538 | <varlistentry id="libc">
|
---|
[bb55064] | 539 | <term><filename class="libraryfile">libc</filename></term>
|
---|
[c6cb3aa] | 540 | <listitem>
|
---|
[673b0d8] | 541 | <indexterm zone="ch-system-glibc libc"><primary sortas="c-libc">libc</primary></indexterm>
|
---|
[c6cb3aa] | 542 | <para>is the main C library -- a collection of commonly used functions.</para>
|
---|
| 543 | </listitem>
|
---|
| 544 | </varlistentry>
|
---|
[673b0d8] | 545 |
|
---|
[b8a819f] | 546 | <varlistentry id="libcrypt">
|
---|
[bb55064] | 547 | <term><filename class="libraryfile">libcrypt</filename></term>
|
---|
[c6cb3aa] | 548 | <listitem>
|
---|
[673b0d8] | 549 | <indexterm zone="ch-system-glibc libcrypt"><primary sortas="c-libcrypt">libcrypt</primary></indexterm>
|
---|
[c6cb3aa] | 550 | <para>is the cryptography library.</para>
|
---|
| 551 | </listitem>
|
---|
| 552 | </varlistentry>
|
---|
[673b0d8] | 553 |
|
---|
[b8a819f] | 554 | <varlistentry id="libdl">
|
---|
[bb55064] | 555 | <term><filename class="libraryfile">libdl</filename></term>
|
---|
[c6cb3aa] | 556 | <listitem>
|
---|
[673b0d8] | 557 | <indexterm zone="ch-system-glibc libdl"><primary sortas="c-libdl">libdl</primary></indexterm>
|
---|
[c6cb3aa] | 558 | <para>is the dynamic linking interface library.</para>
|
---|
| 559 | </listitem>
|
---|
| 560 | </varlistentry>
|
---|
[673b0d8] | 561 |
|
---|
[b8a819f] | 562 | <varlistentry id="libg">
|
---|
[bb55064] | 563 | <term><filename class="libraryfile">libg</filename></term>
|
---|
[c6cb3aa] | 564 | <listitem>
|
---|
[673b0d8] | 565 | <indexterm zone="ch-system-glibc libg"><primary sortas="c-libg">libg</primary></indexterm>
|
---|
[bb55064] | 566 | <para>is a runtime library for <command>g++</command>.</para>
|
---|
[c6cb3aa] | 567 | </listitem>
|
---|
| 568 | </varlistentry>
|
---|
[673b0d8] | 569 |
|
---|
[b8a819f] | 570 | <varlistentry id="libieee">
|
---|
[bb55064] | 571 | <term><filename class="libraryfile">libieee</filename></term>
|
---|
[c6cb3aa] | 572 | <listitem>
|
---|
[673b0d8] | 573 | <indexterm zone="ch-system-glibc libieee"><primary sortas="c-libieee">libieee</primary></indexterm>
|
---|
[c6cb3aa] | 574 | <para>is the IEEE floating point library.</para>
|
---|
| 575 | </listitem>
|
---|
| 576 | </varlistentry>
|
---|
[673b0d8] | 577 |
|
---|
[b8a819f] | 578 | <varlistentry id="libm">
|
---|
[bb55064] | 579 | <term><filename class="libraryfile">libm</filename></term>
|
---|
[c6cb3aa] | 580 | <listitem>
|
---|
[673b0d8] | 581 | <indexterm zone="ch-system-glibc libm"><primary sortas="c-libm">libm</primary></indexterm>
|
---|
[c6cb3aa] | 582 | <para>is the mathematical library.</para>
|
---|
| 583 | </listitem>
|
---|
| 584 | </varlistentry>
|
---|
[673b0d8] | 585 |
|
---|
[b8a819f] | 586 | <varlistentry id="libmcheck">
|
---|
[bb55064] | 587 | <term><filename class="libraryfile">libmcheck</filename></term>
|
---|
[c6cb3aa] | 588 | <listitem>
|
---|
[673b0d8] | 589 | <indexterm zone="ch-system-glibc libmcheck"><primary sortas="c-libmcheck">libmcheck</primary></indexterm>
|
---|
[c6cb3aa] | 590 | <para>contains code run at boot.</para>
|
---|
| 591 | </listitem>
|
---|
| 592 | </varlistentry>
|
---|
[673b0d8] | 593 |
|
---|
[b8a819f] | 594 | <varlistentry id="libmemusage">
|
---|
[bb55064] | 595 | <term><filename class="libraryfile">libmemusage</filename></term>
|
---|
[c6cb3aa] | 596 | <listitem>
|
---|
[673b0d8] | 597 | <indexterm zone="ch-system-glibc libmemusage"><primary sortas="c-libmemusage">libmemusage</primary></indexterm>
|
---|
[bb55064] | 598 | <para>is used by <command>memusage</command> to help collect
|
---|
[673b0d8] | 599 | information about the memory usage of a program.</para>
|
---|
[c6cb3aa] | 600 | </listitem>
|
---|
| 601 | </varlistentry>
|
---|
[673b0d8] | 602 |
|
---|
[b8a819f] | 603 | <varlistentry id="libnsl">
|
---|
[bb55064] | 604 | <term><filename class="libraryfile">libnsl</filename></term>
|
---|
[c6cb3aa] | 605 | <listitem>
|
---|
[673b0d8] | 606 | <indexterm zone="ch-system-glibc libnsl"><primary sortas="c-libnsl">libnsl</primary></indexterm>
|
---|
[c6cb3aa] | 607 | <para>is the network services library.</para>
|
---|
| 608 | </listitem>
|
---|
| 609 | </varlistentry>
|
---|
[673b0d8] | 610 |
|
---|
[b8a819f] | 611 | <varlistentry id="libnss">
|
---|
[bb55064] | 612 | <term><filename class="libraryfile">libnss*</filename></term>
|
---|
[c6cb3aa] | 613 | <listitem>
|
---|
[673b0d8] | 614 | <indexterm zone="ch-system-glibc libnss"><primary sortas="c-libnss*">libnss*</primary></indexterm>
|
---|
[c6cb3aa] | 615 | <para>are the Name Service Switch libraries,
|
---|
[673b0d8] | 616 | containing functions for resolving host names, user names, group names,
|
---|
[bb55064] | 617 | aliases, services, protocols, and the like.</para>
|
---|
[c6cb3aa] | 618 | </listitem>
|
---|
| 619 | </varlistentry>
|
---|
[673b0d8] | 620 |
|
---|
[b8a819f] | 621 | <varlistentry id="libpcprofile">
|
---|
[bb55064] | 622 | <term><filename class="libraryfile">libpcprofile</filename></term>
|
---|
[c6cb3aa] | 623 | <listitem>
|
---|
[673b0d8] | 624 | <indexterm zone="ch-system-glibc libpcprofile"><primary sortas="c-libpcprofile">libpcprofile</primary></indexterm>
|
---|
[c6cb3aa] | 625 | <para>contains profiling functions used
|
---|
[673b0d8] | 626 | to track the amount of CPU time spent in which source code lines.</para>
|
---|
[c6cb3aa] | 627 | </listitem>
|
---|
| 628 | </varlistentry>
|
---|
[673b0d8] | 629 |
|
---|
[b8a819f] | 630 | <varlistentry id="libpthread">
|
---|
[bb55064] | 631 | <term><filename class="libraryfile">libpthread</filename></term>
|
---|
[c6cb3aa] | 632 | <listitem>
|
---|
[673b0d8] | 633 | <indexterm zone="ch-system-glibc libpthread"><primary sortas="c-libpthread">libpthread</primary></indexterm>
|
---|
[c6cb3aa] | 634 | <para>is the POSIX threads library.</para>
|
---|
| 635 | </listitem>
|
---|
| 636 | </varlistentry>
|
---|
[673b0d8] | 637 |
|
---|
[b8a819f] | 638 | <varlistentry id="libresolv">
|
---|
[bb55064] | 639 | <term><filename class="libraryfile">libresolv</filename></term>
|
---|
[c6cb3aa] | 640 | <listitem>
|
---|
[673b0d8] | 641 | <indexterm zone="ch-system-glibc libresolv"><primary sortas="c-libresolv">libresolv</primary></indexterm>
|
---|
[c6cb3aa] | 642 | <para>contains functions for creating,
|
---|
[673b0d8] | 643 | sending, and interpreting packets to the Internet domain name servers.</para>
|
---|
[c6cb3aa] | 644 | </listitem>
|
---|
| 645 | </varlistentry>
|
---|
[673b0d8] | 646 |
|
---|
[b8a819f] | 647 | <varlistentry id="librpcsvc">
|
---|
[bb55064] | 648 | <term><filename class="libraryfile">librpcsvc</filename></term>
|
---|
[c6cb3aa] | 649 | <listitem>
|
---|
[673b0d8] | 650 | <indexterm zone="ch-system-glibc librpcsvc"><primary sortas="c-librpcsvc">librpcsvc</primary></indexterm>
|
---|
[c6cb3aa] | 651 | <para>contains functions providing miscellaneous RPC services.</para>
|
---|
| 652 | </listitem>
|
---|
| 653 | </varlistentry>
|
---|
[673b0d8] | 654 |
|
---|
[b8a819f] | 655 | <varlistentry id="librt">
|
---|
[bb55064] | 656 | <term><filename class="libraryfile">librt</filename></term>
|
---|
[c6cb3aa] | 657 | <listitem>
|
---|
[673b0d8] | 658 | <indexterm zone="ch-system-glibc librt"><primary sortas="c-librt">librt</primary></indexterm>
|
---|
[c6cb3aa] | 659 | <para>contains functions providing most of the
|
---|
[673b0d8] | 660 | interfaces specified by the POSIX.1b Realtime Extension.</para>
|
---|
[c6cb3aa] | 661 | </listitem>
|
---|
| 662 | </varlistentry>
|
---|
[673b0d8] | 663 |
|
---|
[b8a819f] | 664 | <varlistentry id="libthread_db">
|
---|
[bb55064] | 665 | <term><filename class="libraryfile">libthread_db</filename></term>
|
---|
[c6cb3aa] | 666 | <listitem>
|
---|
[673b0d8] | 667 | <indexterm zone="ch-system-glibc libthread_db"><primary sortas="c-libthread_db">libthread_db</primary></indexterm>
|
---|
[c6cb3aa] | 668 | <para>contains functions useful for
|
---|
[673b0d8] | 669 | building debuggers for multi-threaded programs.</para>
|
---|
[c6cb3aa] | 670 | </listitem>
|
---|
| 671 | </varlistentry>
|
---|
[673b0d8] | 672 |
|
---|
[b8a819f] | 673 | <varlistentry id="libutil">
|
---|
[bb55064] | 674 | <term><filename class="libraryfile">libutil</filename></term>
|
---|
[c6cb3aa] | 675 | <listitem>
|
---|
[673b0d8] | 676 | <indexterm zone="ch-system-glibc libutil"><primary sortas="c-libutil">libutil</primary></indexterm>
|
---|
[bb55064] | 677 | <para>contains code for <quote>standard</quote> functions used in many different Unix utilities.</para>
|
---|
[c6cb3aa] | 678 | </listitem>
|
---|
| 679 | </varlistentry>
|
---|
| 680 | </variablelist>
|
---|
[673b0d8] | 681 |
|
---|
| 682 | </sect2>
|
---|
| 683 |
|
---|
| 684 | </sect1>
|
---|