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