1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" |
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3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [ |
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4 | <!ENTITY % general-entities SYSTEM "../../general.ent"> |
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5 | %general-entities; |
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6 | ]> |
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7 | |
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8 | <sect1 id="ch-system-glibc" role="wrap"> |
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9 | <?dbhtml filename="glibc.html"?> |
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10 | |
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11 | <title>Glibc-&glibc-version;</title> |
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12 | |
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13 | <indexterm zone="ch-system-glibc"> |
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14 | <primary sortas="a-Glibc">Glibc</primary> |
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15 | </indexterm> |
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16 | |
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17 | <sect2 role="package"> |
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18 | <title/> |
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19 | |
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20 | <para>The Glibc package contains the main C library. This library provides |
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21 | the basic routines for allocating memory, searching directories, opening and |
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22 | closing files, reading and writing files, string handling, pattern matching, |
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23 | arithmetic, and so on.</para> |
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24 | |
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25 | </sect2> |
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26 | |
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27 | <sect2 role="installation"> |
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28 | <title>Installation of Glibc</title> |
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29 | |
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30 | <note os="z"> |
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31 | <para>Some packages outside of CLFS suggest installing GNU libiconv in |
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32 | order to translate data from one encoding to another. The project's |
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33 | home page (<ulink url="http://www.gnu.org/software/libiconv/"/>) says |
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34 | <quote>This library provides an <function>iconv()</function> |
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35 | implementation, for use on systems which don't have one, or whose |
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36 | implementation cannot convert from/to Unicode.</quote> Glibc provides |
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37 | an <function>iconv()</function> implementation and can convert from/to |
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38 | Unicode, therefore libiconv is not required on a CLFS system.</para> |
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39 | </note> |
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40 | |
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41 | <para os="b">The Glibc build system is self-contained and will install |
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42 | perfectly, even though the compiler specs file and linker are still |
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43 | pointing at <filename class="directory">/tools</filename>. The specs |
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44 | and linker cannot be adjusted before the Glibc install because the |
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45 | Glibc Autoconf tests would give false results and defeat the goal |
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46 | of achieving a clean build.</para> |
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47 | |
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48 | <para os="c">The following patch fixes an issue that can |
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49 | cause <command>localdef</command> to segfault:</para> |
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50 | |
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51 | <screen os="d"><userinput>patch -Np1 -i ../&glibc-localedef_segfault-patch;</userinput></screen> |
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52 | |
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53 | <para os="p1">The following patch fixes an issue with iconv:</para> |
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54 | |
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55 | <screen os="p2"><userinput>patch -Np1 -i ../&glibc-iconv_fix-patch;</userinput></screen> |
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56 | |
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57 | <para os="s1">The following <command>sed</command> fixes a build issue |
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58 | with Glibc. This will prevent <command>nscd</command> from trying to |
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59 | link to libraries that don't exist:</para> |
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60 | |
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61 | <screen os="s2"><userinput>cp -v nscd/Makefile{,.orig} |
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62 | sed -e "/nscd_stat.o: sysincludes = # nothing/d" nscd/Makefile.orig > \ |
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63 | nscd/Makefile</userinput></screen> |
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64 | |
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65 | <para os="e">The Glibc documentation recommends building Glibc outside of the |
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66 | source directory in a dedicated build directory:</para> |
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67 | |
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68 | <screen os="f"><userinput>mkdir -v ../glibc-build |
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69 | cd ../glibc-build</userinput></screen> |
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70 | |
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71 | <para os="g">Prepare Glibc for compilation:</para> |
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72 | |
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73 | <screen os="h"><userinput>../glibc-&glibc-version;/configure --prefix=/usr \ |
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74 | --disable-profile --enable-add-ons --enable-kernel=2.6.0 \ |
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75 | --libexecdir=/usr/lib/glibc</userinput></screen> |
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76 | |
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77 | <variablelist os="i"> |
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78 | <title>The meaning of the new configure option:</title> |
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79 | |
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80 | <varlistentry> |
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81 | <term><parameter>--libexecdir=/usr/lib/glibc</parameter></term> |
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82 | <listitem> |
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83 | <para>This changes the location of the <command>pt_chown</command> |
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84 | program from its default of <filename |
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85 | class="directory">/usr/libexec</filename> to <filename |
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86 | class="directory">/usr/lib/glibc</filename>.</para> |
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87 | </listitem> |
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88 | </varlistentry> |
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89 | </variablelist> |
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90 | |
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91 | <para os="j">Compile the package:</para> |
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92 | |
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93 | <screen os="k"><userinput>make</userinput></screen> |
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94 | |
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95 | <important os="l"> |
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96 | <para>The test suite for Glibc is considered critical. |
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97 | Do not skip it under any circumstance.</para> |
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98 | </important> |
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99 | |
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100 | <para os="m">Test the results:</para> |
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101 | |
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102 | <!-- items n,o,p no longer the master, use x86_64 which has no failures --> |
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103 | |
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104 | <screen os="n"><userinput>make -k check >glibc-check-log 2>&1 ; grep Error glibc-check-log</userinput></screen> |
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105 | |
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106 | <para os="o">The Glibc test suite is highly dependent on certain functions of |
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107 | the host system, in particular the kernel. The posix/annexc test normally fails |
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108 | and you should see <literal>Error 1 (ignored)</literal> in the output. Apart |
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109 | from this, the Glibc test suite is always expected to pass. However, in certain |
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110 | circumstances, some failures are unavoidable. If a test fails because of a missing |
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111 | program (or missing symbolic link), or a segfault, you will see an error code |
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112 | greater than 127 and the details will be in the log. More commonly, tests will |
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113 | fail with <literal>Error 2</literal> - for these, the contents of the corresponding |
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114 | <filename>.out</filename> file, e.g. <filename>posix/annexc.out</filename> may be |
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115 | informative. Here is a list of the most common issues:</para> |
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116 | |
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117 | <itemizedlist os="p"> |
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118 | <listitem> |
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119 | <para>The <emphasis>math</emphasis> tests sometimes fail. |
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120 | Certain optimization settings are known to be a |
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121 | factor here.</para> |
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122 | </listitem> |
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123 | <listitem> |
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124 | <para>If you have mounted the CLFS partition with the |
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125 | <parameter>noatime</parameter> option, the <emphasis>atime</emphasis> test |
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126 | will fail. As mentioned in <xref linkend="ch-partitioning-mounting"/>, |
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127 | do not use the <parameter>noatime</parameter> option while building |
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128 | CLFS.</para> |
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129 | </listitem> |
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130 | <listitem> |
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131 | <para>When running on older and slower hardware, some tests |
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132 | can fail because of test timeouts being exceeded.</para> |
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133 | </listitem> |
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134 | </itemizedlist> |
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135 | |
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136 | <para os="q">Though it is a harmless message, the install stage of Glibc will |
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137 | complain about the absence of <filename>/etc/ld.so.conf</filename>. |
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138 | Prevent this warning with:</para> |
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139 | |
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140 | <screen os="r"><userinput>touch /etc/ld.so.conf</userinput></screen> |
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141 | |
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142 | <para os="s">Install the package:</para> |
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143 | |
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144 | <screen os="t"><userinput>make install</userinput></screen> |
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145 | |
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146 | </sect2> |
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147 | |
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148 | <sect2 id="i18n-glibc" role="configuration"> |
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149 | <title>Internationalization</title> |
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150 | |
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151 | <para>The locales that can make the system respond in a different |
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152 | language were not installed by the above command. Install them |
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153 | with:</para> |
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154 | |
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155 | <screen><userinput>make localedata/install-locales</userinput></screen> |
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156 | |
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157 | <para>To save time, an alternative to running the previous command (which |
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158 | generates and installs every locale listed in the |
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159 | glibc-&glibc-version;/localedata/SUPPORTED file) is to install only |
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160 | those locales that are wanted and needed. This can be achieved by using |
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161 | the <command>localedef</command> command. Information on this command is |
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162 | located in the <filename>INSTALL</filename> file in the Glibc source. |
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163 | However, there are a number of locales that are essential in order for the |
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164 | tests of future packages to pass, in particular, the |
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165 | <emphasis>libstdc++</emphasis> tests from GCC. The following instructions, |
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166 | instead of the <parameter>install-locales</parameter> target used above, |
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167 | will install the minimum set of locales necessary for the tests to run |
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168 | successfully:</para> |
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169 | |
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170 | <screen role="nodump"><userinput>mkdir -pv /usr/lib/locale |
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171 | localedef -i de_DE -f ISO-8859-1 de_DE |
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172 | localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro |
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173 | localedef -i en_HK -f ISO-8859-1 en_HK |
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174 | localedef -i en_PH -f ISO-8859-1 en_PH |
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175 | localedef -i en_US -f ISO-8859-1 en_US |
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176 | localedef -i es_MX -f ISO-8859-1 es_MX |
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177 | localedef -i fa_IR -f UTF-8 fa_IR |
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178 | localedef -i fr_FR -f ISO-8859-1 fr_FR |
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179 | localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro |
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180 | localedef -i it_IT -f ISO-8859-1 it_IT |
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181 | localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen> |
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182 | |
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183 | <para>Some locales installed by the <command>make |
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184 | localedata/install-locales</command> command above are not properly |
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185 | supported by some applications that are in the CLFS and BLFS books. Because |
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186 | of the various problems that arise due to application programmers making |
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187 | assumptions that break in such locales, CLFS should not be used in locales |
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188 | that utilize multibyte character sets (including UTF-8) or right-to-left |
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189 | writing order. Numerous unofficial and unstable patches are required to |
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190 | fix these problems, and it has been decided by the CLFS developers not to |
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191 | support such complex locales at this time. This applies to the ja_JP and |
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192 | fa_IR locales as well—they have been installed only for GCC and |
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193 | Gettext tests to pass, and the <command>watch</command> program (part of |
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194 | the Procps package) does not work properly in them. Various attempts to |
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195 | circumvent these restrictions are documented in internationalization-related |
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196 | hints.</para> |
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197 | |
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198 | </sect2> |
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199 | |
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200 | <sect2 id="conf-glibc" role="configuration"> |
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201 | <title>Configuring Glibc</title> |
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202 | |
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203 | <indexterm zone="conf-glibc"> |
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204 | <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary> |
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205 | </indexterm> |
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206 | |
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207 | <indexterm zone="conf-glibc"> |
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208 | <primary sortas="e-/etc/localtime">/etc/localtime</primary> |
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209 | </indexterm> |
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210 | |
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211 | <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created |
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212 | because, although Glibc provides defaults when this file is missing or |
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213 | corrupt, the Glibc defaults do not work well in a networked environment. |
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214 | The time zone also needs to be configured.</para> |
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215 | |
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216 | <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running |
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217 | the following:</para> |
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218 | |
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219 | <screen><userinput>cat > /etc/nsswitch.conf << "EOF" |
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220 | <literal># Begin /etc/nsswitch.conf |
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221 | |
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222 | passwd: files |
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223 | group: files |
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224 | shadow: files |
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225 | |
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226 | hosts: files dns |
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227 | networks: files |
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228 | |
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229 | protocols: files |
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230 | services: files |
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231 | ethers: files |
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232 | rpc: files |
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233 | |
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234 | # End /etc/nsswitch.conf</literal> |
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235 | EOF</userinput></screen> |
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236 | |
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237 | <para>To determine the local time zone, run the following script:</para> |
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238 | |
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239 | <screen role="nodump"><userinput>tzselect</userinput></screen> |
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240 | |
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241 | <para>After answering a few questions about the location, the script will |
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242 | output the name of the time zone (e.g., <emphasis>EST5EDT</emphasis> or |
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243 | <emphasis>Canada/Eastern</emphasis>). Then create the |
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244 | <filename>/etc/localtime</filename> file by running:</para> |
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245 | |
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246 | <screen><userinput>cp -v --remove-destination /usr/share/zoneinfo/<replaceable>[xxx]</replaceable> \ |
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247 | /etc/localtime</userinput></screen> |
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248 | |
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249 | <para>Replace <replaceable>[xxx]</replaceable> with the name of the time zone |
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250 | that <command>tzselect</command> provided (e.g., Canada/Eastern).</para> |
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251 | |
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252 | <variablelist> |
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253 | <title>The meaning of the cp option:</title> |
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254 | |
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255 | <varlistentry> |
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256 | <term><parameter>--remove-destination</parameter></term> |
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257 | <listitem> |
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258 | <para>This is needed to force removal of the already existing symbolic |
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259 | link. The reason for copying the file instead of using a symlink is to |
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260 | cover the situation where <filename class="directory">/usr</filename> |
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261 | is on a separate partition. This could be important when booted into |
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262 | single user mode.</para> |
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263 | </listitem> |
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264 | </varlistentry> |
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265 | </variablelist> |
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266 | |
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267 | </sect2> |
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268 | |
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269 | <sect2 id="conf-ld" role="configuration"> |
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270 | <title>Configuring The Dynamic Loader</title> |
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271 | |
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272 | <indexterm zone="conf-ld"> |
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273 | <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary> |
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274 | </indexterm> |
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275 | |
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276 | <para>By default, the dynamic loader (<filename |
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277 | class="libraryfile">/lib/ld-linux.so.2</filename>) searches through |
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278 | <filename class="directory">/lib</filename> and <filename |
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279 | class="directory">/usr/lib</filename> for dynamic libraries that are |
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280 | needed by programs as they are run. However, if there are libraries in |
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281 | directories other than <filename class="directory">/lib</filename> and |
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282 | <filename class="directory">/usr/lib</filename>, these need to be |
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283 | added to the <filename>/etc/ld.so.conf</filename> file in order |
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284 | for the dynamic loader to find them. Two directories that are commonly |
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285 | known to contain additional libraries are <filename |
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286 | class="directory">/usr/local/lib</filename> and <filename |
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287 | class="directory">/opt/lib</filename>, so add those directories to the |
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288 | dynamic loader's search path.</para> |
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289 | |
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290 | <para>Create a new file <filename>/etc/ld.so.conf</filename> by running the |
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291 | following:</para> |
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292 | |
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293 | <screen><userinput>cat > /etc/ld.so.conf << "EOF" |
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294 | <literal># Begin /etc/ld.so.conf |
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295 | |
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296 | /usr/local/lib |
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297 | /opt/lib |
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298 | |
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299 | # End /etc/ld.so.conf</literal> |
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300 | EOF</userinput></screen> |
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301 | |
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302 | </sect2> |
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303 | |
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304 | <sect2 id="contents-glibc" role="content"> |
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305 | <title>Contents of Glibc</title> |
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306 | |
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307 | <segmentedlist> |
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308 | <segtitle>Installed programs</segtitle> |
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309 | <segtitle>Installed libraries</segtitle> |
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310 | |
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311 | <seglistitem> |
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312 | <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig, |
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313 | ldd, lddlibc4, locale, localedef, mtrace, nscd, |
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314 | pcprofiledump, pt_chown, rpcgen, rpcinfo, sln, sprof, tzselect, xtrace, |
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315 | zdump, and zic</seg> |
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316 | <seg>ld.so, libBrokenLocale.[a,so], libSegFault.so, libanl.[a,so], |
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317 | libbsd-compat.a, libc.[a,so], libcrypt.[a,so], libdl.[a,so], libg.a, |
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318 | libieee.a, libm.[a,so], libmcheck.a, libmemusage.so, libnsl.a, |
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319 | libnss_compat.so, libnss_dns.so, libnss_files.so, libnss_hesiod.so, |
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320 | libnss_nis.so, libnss_nisplus.so, libpcprofile.so, libpthread.[a,so], |
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321 | libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so, and |
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322 | libutil.[a,so]</seg> |
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323 | </seglistitem> |
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324 | </segmentedlist> |
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325 | |
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326 | <variablelist> |
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327 | <bridgehead renderas="sect3">Short Descriptions</bridgehead> |
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328 | <?dbfo list-presentation="list"?> |
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329 | <?dbhtml list-presentation="table"?> |
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330 | |
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331 | <varlistentry id="catchsegv"> |
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332 | <term><command>catchsegv</command></term> |
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333 | <listitem> |
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334 | <para>Can be used to create a stack trace when a program |
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335 | terminates with a segmentation fault</para> |
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336 | <indexterm zone="ch-system-glibc catchsegv"> |
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337 | <primary sortas="b-catchsegv">catchsegv</primary> |
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338 | </indexterm> |
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339 | </listitem> |
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340 | </varlistentry> |
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341 | |
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342 | <varlistentry id="gencat"> |
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343 | <term><command>gencat</command></term> |
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344 | <listitem> |
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345 | <para>Generates message catalogues</para> |
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346 | <indexterm zone="ch-system-glibc gencat"> |
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347 | <primary sortas="b-gencat">gencat</primary> |
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348 | </indexterm> |
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349 | </listitem> |
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350 | </varlistentry> |
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351 | |
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352 | <varlistentry id="getconf"> |
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353 | <term><command>getconf</command></term> |
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354 | <listitem> |
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355 | <para>Displays the system configuration values for file system specific |
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356 | variables</para> |
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357 | <indexterm zone="ch-system-glibc getconf"> |
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358 | <primary sortas="b-getconf">getconf</primary> |
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359 | </indexterm> |
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360 | </listitem> |
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361 | </varlistentry> |
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362 | |
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363 | <varlistentry id="getent"> |
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364 | <term><command>getent</command></term> |
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365 | <listitem> |
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366 | <para>Gets entries from an administrative database</para> |
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367 | <indexterm zone="ch-system-glibc getent"> |
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368 | <primary sortas="b-getent">getent</primary> |
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369 | </indexterm> |
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370 | </listitem> |
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371 | </varlistentry> |
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372 | |
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373 | <varlistentry id="iconv"> |
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374 | <term><command>iconv</command></term> |
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375 | <listitem> |
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376 | <para>Performs character set conversion</para> |
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377 | <indexterm zone="ch-system-glibc iconv"> |
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378 | <primary sortas="b-iconv">iconv</primary> |
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379 | </indexterm> |
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380 | </listitem> |
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381 | </varlistentry> |
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382 | |
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383 | <varlistentry id="iconvconfig"> |
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384 | <term><command>iconvconfig</command></term> |
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385 | <listitem> |
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386 | <para>Creates fastloading <command>iconv</command> module configuration |
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387 | files</para> |
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388 | <indexterm zone="ch-system-glibc iconvconfig"> |
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389 | <primary sortas="b-iconvconfig">iconvconfig</primary> |
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390 | </indexterm> |
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391 | </listitem> |
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392 | </varlistentry> |
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393 | |
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394 | <varlistentry id="ldconfig"> |
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395 | <term><command>ldconfig</command></term> |
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396 | <listitem> |
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397 | <para>Configures the dynamic linker runtime bindings</para> |
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398 | <indexterm zone="ch-system-glibc ldconfig"> |
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399 | <primary sortas="b-ldconfig">ldconfig</primary> |
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400 | </indexterm> |
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401 | </listitem> |
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402 | </varlistentry> |
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403 | |
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404 | <varlistentry id="ldd"> |
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405 | <term><command>ldd</command></term> |
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406 | <listitem> |
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407 | <para>Reports which shared libraries are required |
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408 | by each given program or shared library</para> |
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409 | <indexterm zone="ch-system-glibc ldd"> |
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410 | <primary sortas="b-ldd">ldd</primary> |
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411 | </indexterm> |
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412 | </listitem> |
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413 | </varlistentry> |
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414 | |
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415 | <varlistentry id="lddlibc4"> |
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416 | <term><command>lddlibc4</command></term> |
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417 | <listitem> |
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418 | <para>Assists <command>ldd</command> with object files</para> |
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419 | <indexterm zone="ch-system-glibc lddlibc4"> |
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420 | <primary sortas="b-lddlibc4">lddlibc4</primary> |
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421 | </indexterm> |
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422 | </listitem> |
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423 | </varlistentry> |
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424 | |
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425 | <varlistentry id="locale"> |
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426 | <term><command>locale</command></term> |
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427 | <listitem> |
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428 | <para>Tells the compiler to enable or disable the use of POSIX locales |
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429 | for built-in operations</para> |
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430 | <indexterm zone="ch-system-glibc locale"> |
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431 | <primary sortas="b-locale">locale</primary> |
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432 | </indexterm> |
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433 | </listitem> |
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434 | </varlistentry> |
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435 | |
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436 | <varlistentry id="localedef"> |
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437 | <term><command>localedef</command></term> |
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438 | <listitem> |
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439 | <para>Compiles locale specifications</para> |
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440 | <indexterm zone="ch-system-glibc localedef"> |
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441 | <primary sortas="b-localedef">localedef</primary> |
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442 | </indexterm> |
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443 | </listitem> |
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444 | </varlistentry> |
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445 | |
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446 | <varlistentry id="mtrace"> |
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447 | <term><command>mtrace</command></term> |
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448 | <listitem> |
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449 | <para>Reads and interprets a memory trace file and |
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450 | displays a summary in human-readable format</para> |
---|
451 | <indexterm zone="ch-system-glibc mtrace"> |
---|
452 | <primary sortas="b-mtrace">mtrace</primary> |
---|
453 | </indexterm> |
---|
454 | </listitem> |
---|
455 | </varlistentry> |
---|
456 | |
---|
457 | <varlistentry id="nscd"> |
---|
458 | <term><command>nscd</command></term> |
---|
459 | <listitem> |
---|
460 | <para>A daemon that provides a cache for the most common name |
---|
461 | service requests</para> |
---|
462 | <indexterm zone="ch-system-glibc nscd"> |
---|
463 | <primary sortas="b-nscd">nscd</primary> |
---|
464 | </indexterm> |
---|
465 | </listitem> |
---|
466 | </varlistentry> |
---|
467 | |
---|
468 | <varlistentry id="pcprofiledump"> |
---|
469 | <term><command>pcprofiledump</command></term> |
---|
470 | <listitem> |
---|
471 | <para>Dumps information generated by PC profiling</para> |
---|
472 | <indexterm zone="ch-system-glibc pcprofiledump"> |
---|
473 | <primary sortas="b-pcprofiledump">pcprofiledump</primary> |
---|
474 | </indexterm> |
---|
475 | </listitem> |
---|
476 | </varlistentry> |
---|
477 | |
---|
478 | <varlistentry id="pt_chown"> |
---|
479 | <term><command>pt_chown</command></term> |
---|
480 | <listitem> |
---|
481 | <para>A helper program for <command>grantpt</command> to set the owner, |
---|
482 | group and access permissions of a slave pseudo terminal</para> |
---|
483 | <indexterm zone="ch-system-glibc pt_chown"> |
---|
484 | <primary sortas="b-pt_chown">pt_chown</primary> |
---|
485 | </indexterm> |
---|
486 | </listitem> |
---|
487 | </varlistentry> |
---|
488 | |
---|
489 | <varlistentry id="rpcgen"> |
---|
490 | <term><command>rpcgen</command></term> |
---|
491 | <listitem> |
---|
492 | <para>Generates C code to implement the Remote Procecure Call (RPC) |
---|
493 | protocol</para> |
---|
494 | <indexterm zone="ch-system-glibc rpcgen"> |
---|
495 | <primary sortas="b-rpcgen">rpcgen</primary> |
---|
496 | </indexterm> |
---|
497 | </listitem> |
---|
498 | </varlistentry> |
---|
499 | |
---|
500 | <varlistentry id="rpcinfo"> |
---|
501 | <term><command>rpcinfo</command></term> |
---|
502 | <listitem> |
---|
503 | <para>Makes an RPC call to an RPC server</para> |
---|
504 | <indexterm zone="ch-system-glibc rpcinfo"> |
---|
505 | <primary sortas="b-rpcinfo">rpcinfo</primary> |
---|
506 | </indexterm> |
---|
507 | </listitem> |
---|
508 | </varlistentry> |
---|
509 | |
---|
510 | <varlistentry id="sln"> |
---|
511 | <term><command>sln</command></term> |
---|
512 | <listitem> |
---|
513 | <para>A statically linked program that creates symbolic links</para> |
---|
514 | <indexterm zone="ch-system-glibc sln"> |
---|
515 | <primary sortas="b-sln">sln</primary> |
---|
516 | </indexterm> |
---|
517 | </listitem> |
---|
518 | </varlistentry> |
---|
519 | |
---|
520 | <varlistentry id="sprof"> |
---|
521 | <term><command>sprof</command></term> |
---|
522 | <listitem> |
---|
523 | <para>Reads and displays shared object profiling data</para> |
---|
524 | <indexterm zone="ch-system-glibc sprof"> |
---|
525 | <primary sortas="b-sprof">sprof</primary> |
---|
526 | </indexterm> |
---|
527 | </listitem> |
---|
528 | </varlistentry> |
---|
529 | |
---|
530 | <varlistentry id="tzselect"> |
---|
531 | <term><command>tzselect</command></term> |
---|
532 | <listitem> |
---|
533 | <para>Asks the user about the location of the |
---|
534 | system and reports the corresponding time zone description</para> |
---|
535 | <indexterm zone="ch-system-glibc tzselect"> |
---|
536 | <primary sortas="b-tzselect">tzselect</primary> |
---|
537 | </indexterm> |
---|
538 | </listitem> |
---|
539 | </varlistentry> |
---|
540 | |
---|
541 | <varlistentry id="xtrace"> |
---|
542 | <term><command>xtrace</command></term> |
---|
543 | <listitem> |
---|
544 | <para>Traces the execution of a program by |
---|
545 | printing the currently executed function</para> |
---|
546 | <indexterm zone="ch-system-glibc xtrace"> |
---|
547 | <primary sortas="b-xtrace">xtrace</primary> |
---|
548 | </indexterm> |
---|
549 | </listitem> |
---|
550 | </varlistentry> |
---|
551 | |
---|
552 | <varlistentry id="zdump"> |
---|
553 | <term><command>zdump</command></term> |
---|
554 | <listitem> |
---|
555 | <para>The time zone dumper</para> |
---|
556 | <indexterm zone="ch-system-glibc zdump"> |
---|
557 | <primary sortas="b-zdump">zdump</primary> |
---|
558 | </indexterm> |
---|
559 | </listitem> |
---|
560 | </varlistentry> |
---|
561 | |
---|
562 | <varlistentry id="zic"> |
---|
563 | <term><command>zic</command></term> |
---|
564 | <listitem> |
---|
565 | <para>The time zone compiler</para> |
---|
566 | <indexterm zone="ch-system-glibc zic"> |
---|
567 | <primary sortas="b-zic">zic</primary> |
---|
568 | </indexterm> |
---|
569 | </listitem> |
---|
570 | </varlistentry> |
---|
571 | |
---|
572 | <varlistentry id="ld.so"> |
---|
573 | <term><filename class="libraryfile">ld.so</filename></term> |
---|
574 | <listitem> |
---|
575 | <para>The helper program for shared library executables</para> |
---|
576 | <indexterm zone="ch-system-glibc ld.so"> |
---|
577 | <primary sortas="c-ld.so">ld.so</primary> |
---|
578 | </indexterm> |
---|
579 | </listitem> |
---|
580 | </varlistentry> |
---|
581 | |
---|
582 | <varlistentry id="libBrokenLocale"> |
---|
583 | <term><filename class="libraryfile">libBrokenLocale</filename></term> |
---|
584 | <listitem> |
---|
585 | <para>Used by programs, such as Mozilla, to solve broken locales</para> |
---|
586 | <indexterm zone="ch-system-glibc libBrokenLocale"> |
---|
587 | <primary sortas="c-libBrokenLocale">libBrokenLocale</primary> |
---|
588 | </indexterm> |
---|
589 | </listitem> |
---|
590 | </varlistentry> |
---|
591 | |
---|
592 | <varlistentry id="libSegFault"> |
---|
593 | <term><filename class="libraryfile">libSegFault</filename></term> |
---|
594 | <listitem> |
---|
595 | <para>The segmentation fault signal handler</para> |
---|
596 | <indexterm zone="ch-system-glibc libSegFault"> |
---|
597 | <primary sortas="c-libSegFault">libSegFault</primary> |
---|
598 | </indexterm> |
---|
599 | </listitem> |
---|
600 | </varlistentry> |
---|
601 | |
---|
602 | <varlistentry id="libanl"> |
---|
603 | <term><filename class="libraryfile">libanl</filename></term> |
---|
604 | <listitem> |
---|
605 | <para>An asynchronous name lookup library</para> |
---|
606 | <indexterm zone="ch-system-glibc libanl"> |
---|
607 | <primary sortas="c-libanl">libanl</primary> |
---|
608 | </indexterm> |
---|
609 | </listitem> |
---|
610 | </varlistentry> |
---|
611 | |
---|
612 | <varlistentry id="libbsd-compat"> |
---|
613 | <term><filename class="libraryfile">libbsd-compat</filename></term> |
---|
614 | <listitem> |
---|
615 | <para>Provides the portability needed |
---|
616 | in order to run certain Berkey Software Distribution (BSD) programs |
---|
617 | under Linux</para> |
---|
618 | <indexterm zone="ch-system-glibc libbsd-compat"> |
---|
619 | <primary sortas="c-libbsd-compat">libbsd-compat</primary> |
---|
620 | </indexterm> |
---|
621 | </listitem> |
---|
622 | </varlistentry> |
---|
623 | |
---|
624 | <varlistentry id="libc"> |
---|
625 | <term><filename class="libraryfile">libc</filename></term> |
---|
626 | <listitem> |
---|
627 | <para>The main C library</para> |
---|
628 | <indexterm zone="ch-system-glibc libc"> |
---|
629 | <primary sortas="c-libc">libc</primary> |
---|
630 | </indexterm> |
---|
631 | </listitem> |
---|
632 | </varlistentry> |
---|
633 | |
---|
634 | <varlistentry id="libcrypt"> |
---|
635 | <term><filename class="libraryfile">libcrypt</filename></term> |
---|
636 | <listitem> |
---|
637 | <para>The cryptography library</para> |
---|
638 | <indexterm zone="ch-system-glibc libcrypt"> |
---|
639 | <primary sortas="c-libcrypt">libcrypt</primary> |
---|
640 | </indexterm> |
---|
641 | </listitem> |
---|
642 | </varlistentry> |
---|
643 | |
---|
644 | <varlistentry id="libdl"> |
---|
645 | <term><filename class="libraryfile">libdl</filename></term> |
---|
646 | <listitem> |
---|
647 | <para>The dynamic linking interface library</para> |
---|
648 | <indexterm zone="ch-system-glibc libdl"> |
---|
649 | <primary sortas="c-libdl">libdl</primary> |
---|
650 | </indexterm> |
---|
651 | </listitem> |
---|
652 | </varlistentry> |
---|
653 | |
---|
654 | <varlistentry id="libg"> |
---|
655 | <term><filename class="libraryfile">libg</filename></term> |
---|
656 | <listitem> |
---|
657 | <para>A runtime library for <command>g++</command></para> |
---|
658 | <indexterm zone="ch-system-glibc libg"> |
---|
659 | <primary sortas="c-libg">libg</primary> |
---|
660 | </indexterm> |
---|
661 | </listitem> |
---|
662 | </varlistentry> |
---|
663 | |
---|
664 | <varlistentry id="libieee"> |
---|
665 | <term><filename class="libraryfile">libieee</filename></term> |
---|
666 | <listitem> |
---|
667 | <para>The Institute of Electrical and Electronic Engineers (IEEE) |
---|
668 | floating point library</para> |
---|
669 | <indexterm zone="ch-system-glibc libieee"> |
---|
670 | <primary sortas="c-libieee">libieee</primary> |
---|
671 | </indexterm> |
---|
672 | </listitem> |
---|
673 | </varlistentry> |
---|
674 | |
---|
675 | <varlistentry id="libm"> |
---|
676 | <term><filename class="libraryfile">libm</filename></term> |
---|
677 | <listitem> |
---|
678 | <para>The mathematical library</para> |
---|
679 | <indexterm zone="ch-system-glibc libm"> |
---|
680 | <primary sortas="c-libm">libm</primary> |
---|
681 | </indexterm> |
---|
682 | </listitem> |
---|
683 | </varlistentry> |
---|
684 | |
---|
685 | <varlistentry id="libmcheck"> |
---|
686 | <term><filename class="libraryfile">libmcheck</filename></term> |
---|
687 | <listitem> |
---|
688 | <para>Contains code run at boot</para> |
---|
689 | <indexterm zone="ch-system-glibc libmcheck"> |
---|
690 | <primary sortas="c-libmcheck">libmcheck</primary> |
---|
691 | </indexterm> |
---|
692 | </listitem> |
---|
693 | </varlistentry> |
---|
694 | |
---|
695 | <varlistentry id="libmemusage"> |
---|
696 | <term><filename class="libraryfile">libmemusage</filename></term> |
---|
697 | <listitem> |
---|
698 | <para>Used by <command>memusage</command> (included in Glibc, but |
---|
699 | not built in a base CLFS system as it has additional dependencies) |
---|
700 | to help collect information about the memory usage of a program</para> |
---|
701 | <indexterm zone="ch-system-glibc libmemusage"> |
---|
702 | <primary sortas="c-libmemusage">libmemusage</primary> |
---|
703 | </indexterm> |
---|
704 | </listitem> |
---|
705 | </varlistentry> |
---|
706 | |
---|
707 | <varlistentry id="libnsl"> |
---|
708 | <term><filename class="libraryfile">libnsl</filename></term> |
---|
709 | <listitem> |
---|
710 | <para>The network services library</para> |
---|
711 | <indexterm zone="ch-system-glibc libnsl"> |
---|
712 | <primary sortas="c-libnsl">libnsl</primary> |
---|
713 | </indexterm> |
---|
714 | </listitem> |
---|
715 | </varlistentry> |
---|
716 | |
---|
717 | <varlistentry id="libnss"> |
---|
718 | <term><filename class="libraryfile">libnss</filename></term> |
---|
719 | <listitem> |
---|
720 | <para>The Name Service Switch libraries, containing functions for |
---|
721 | resolving host names, user names, group names, aliases, services, |
---|
722 | protocols, etc.</para> |
---|
723 | <indexterm zone="ch-system-glibc libnss"> |
---|
724 | <primary sortas="c-libnss">libnss</primary> |
---|
725 | </indexterm> |
---|
726 | </listitem> |
---|
727 | </varlistentry> |
---|
728 | |
---|
729 | <varlistentry id="libpcprofile"> |
---|
730 | <term><filename class="libraryfile">libpcprofile</filename></term> |
---|
731 | <listitem> |
---|
732 | <para>Contains profiling functions used to track the amount of CPU |
---|
733 | time spent in specific source code lines</para> |
---|
734 | <indexterm zone="ch-system-glibc libpcprofile"> |
---|
735 | <primary sortas="c-libpcprofile">libpcprofile</primary> |
---|
736 | </indexterm> |
---|
737 | </listitem> |
---|
738 | </varlistentry> |
---|
739 | |
---|
740 | <varlistentry id="libpthread"> |
---|
741 | <term><filename class="libraryfile">libpthread</filename></term> |
---|
742 | <listitem> |
---|
743 | <para>The POSIX threads library</para> |
---|
744 | <indexterm zone="ch-system-glibc libpthread"> |
---|
745 | <primary sortas="c-libpthread">libpthread</primary> |
---|
746 | </indexterm> |
---|
747 | </listitem> |
---|
748 | </varlistentry> |
---|
749 | |
---|
750 | <varlistentry id="libresolv"> |
---|
751 | <term><filename class="libraryfile">libresolv</filename></term> |
---|
752 | <listitem> |
---|
753 | <para>Contains functions for creating, sending, and interpreting |
---|
754 | packets to the Internet domain name servers</para> |
---|
755 | <indexterm zone="ch-system-glibc libresolv"> |
---|
756 | <primary sortas="c-libresolv">libresolv</primary> |
---|
757 | </indexterm> |
---|
758 | </listitem> |
---|
759 | </varlistentry> |
---|
760 | |
---|
761 | <varlistentry id="librpcsvc"> |
---|
762 | <term><filename class="libraryfile">librpcsvc</filename></term> |
---|
763 | <listitem> |
---|
764 | <para>Contains functions providing miscellaneous RPC services</para> |
---|
765 | <indexterm zone="ch-system-glibc librpcsvc"> |
---|
766 | <primary sortas="c-librpcsvc">librpcsvc</primary> |
---|
767 | </indexterm> |
---|
768 | </listitem> |
---|
769 | </varlistentry> |
---|
770 | |
---|
771 | <varlistentry id="librt"> |
---|
772 | <term><filename class="libraryfile">librt</filename></term> |
---|
773 | <listitem> |
---|
774 | <para>Contains functions providing most of the interfaces specified by |
---|
775 | the POSIX.1b Realtime Extension</para> |
---|
776 | <indexterm zone="ch-system-glibc librt"> |
---|
777 | <primary sortas="c-librt">librt</primary> |
---|
778 | </indexterm> |
---|
779 | </listitem> |
---|
780 | </varlistentry> |
---|
781 | |
---|
782 | <varlistentry id="libthread_db"> |
---|
783 | <term><filename class="libraryfile">libthread_db</filename></term> |
---|
784 | <listitem> |
---|
785 | <para>Contains functions useful for |
---|
786 | building debuggers for multi-threaded programs</para> |
---|
787 | <indexterm zone="ch-system-glibc libthread_db"> |
---|
788 | <primary sortas="c-libthread_db">libthread_db</primary> |
---|
789 | </indexterm> |
---|
790 | </listitem> |
---|
791 | </varlistentry> |
---|
792 | |
---|
793 | <varlistentry id="libutil"> |
---|
794 | <term><filename class="libraryfile">libutil</filename></term> |
---|
795 | <listitem> |
---|
796 | <para>Contains code for <quote>standard</quote> functions used in |
---|
797 | many different Unix utilities</para> |
---|
798 | <indexterm zone="ch-system-glibc libutil"> |
---|
799 | <primary sortas="c-libutil">libutil</primary> |
---|
800 | </indexterm> |
---|
801 | </listitem> |
---|
802 | </varlistentry> |
---|
803 | |
---|
804 | </variablelist> |
---|
805 | |
---|
806 | </sect2> |
---|
807 | |
---|
808 | </sect1> |
---|