source: BOOK/final-system/x86/glibc.xml @ e0b0856

clfs-1.2clfs-2.1clfs-3.0.0-systemdclfs-3.0.0-sysvinitsystemdsysvinit
Last change on this file since e0b0856 was e0b0856, checked in by Jim Gifford <clfs@…>, 18 years ago

The nscd sed is no longer needed to build Glibc 2.5
  • Property mode set to 100644
File size: 28.1 KB
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
3  "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
4  <!ENTITY % general-entities SYSTEM "../../general.ent">
5  %general-entities;
6]>
7
8<sect1 id="ch-system-glibc" role="wrap">
9  <?dbhtml filename="glibc.html"?>
10
11  <title>Glibc-&glibc-version;</title>
12
13  <indexterm zone="ch-system-glibc">
14    <primary sortas="a-Glibc">Glibc</primary>
15  </indexterm>
16
17  <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
18  href="../common/glibc.xml"
19  xpointer="xpointer(//*[@role='package'])"/>
20
21  <sect2 role="installation">
22    <title>Installation of Glibc</title>
23
24    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
25    href="../common/glibc.xml"
26    xpointer="xpointer(//*[@os='z'])"/>
27
28    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
29    href="../common/glibc.xml"
30    xpointer="xpointer(//*[@os='b'])"/>
31
32    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
33    href="../common/glibc.xml"
34    xpointer="xpointer(//*[@os='c'])"/>
35
36    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
37    href="../common/glibc.xml"
38    xpointer="xpointer(//*[@os='d'])"/>
39
40    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
41    href="../common/glibc.xml"
42    xpointer="xpointer(//*[@os='p1'])"/>
43
44    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
45    href="../common/glibc.xml"
46    xpointer="xpointer(//*[@os='p2'])"/>
47
48    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
49    href="../common/glibc.xml"
50    xpointer="xpointer(//*[@os='e'])"/>
51
52    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
53    href="../common/glibc.xml"
54    xpointer="xpointer(//*[@os='f'])"/>
55
56    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
57    href="../common/glibc.xml"
58    xpointer="xpointer(//*[@os='g'])"/>
59
60    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
61    href="../common/glibc.xml"
62    xpointer="xpointer(//*[@os='h'])"/>
63
64    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
65    href="../common/glibc.xml"
66    xpointer="xpointer(//*[@os='i'])"/>
67
68    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
69    href="../common/glibc.xml"
70    xpointer="xpointer(//*[@os='j'])"/>
71
72    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
73    href="../common/glibc.xml"
74    xpointer="xpointer(//*[@os='k'])"/>
75
76    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
77    href="../common/glibc.xml"
78    xpointer="xpointer(//*[@os='l'])"/>
79
80    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
81    href="../common/glibc.xml"
82    xpointer="xpointer(//*[@os='m'])"/>
83
84    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
85    href="../common/glibc.xml"
86    xpointer="xpointer(//*[@os='n'])"/>
87
88    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
89    href="../common/glibc.xml"
90    xpointer="xpointer(//*[@os='o'])"/>
91
92    <!-- this is specific to x86 because of the i686 reference in the math tests -->
93    <itemizedlist os="p">
94      <listitem>
95        <para>The <emphasis>math</emphasis> tests, at least on i686, fail in
96        the <emphasis>test-double</emphasis> and <emphasis>test-idouble</emphasis>
97        tests with gcc-&gcc-version;
98        . These two failures in the math tests appear to be harmless.
99        The math tests may also fail on systems where the CPU is not a relatively
100        new genuine Intel or authentic AMD. Certain optimization settings are
101        also known to be a factor here.</para>
102      </listitem>
103      <listitem>
104        <para>If you have mounted the CLFS partition with the
105        <parameter>noatime</parameter> option, the <emphasis>atime</emphasis> test
106        will fail. As mentioned in <xref linkend="ch-partitioning-mounting"/>,
107        do not use the <parameter>noatime</parameter> option while building
108        CLFS.</para>
109      </listitem>
110      <listitem>
111        <para>When running on older and slower hardware, some tests
112        can fail because of test timeouts being exceeded.</para>
113      </listitem>
114    </itemizedlist>
115
116    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
117    href="../common/glibc.xml"
118    xpointer="xpointer(//*[@os='q'])"/>
119
120    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
121    href="../common/glibc.xml"
122    xpointer="xpointer(//*[@os='r'])"/>
123
124    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
125    href="../common/glibc.xml"
126    xpointer="xpointer(//*[@os='s'])"/>
127
128    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
129    href="../common/glibc.xml"
130    xpointer="xpointer(//*[@os='t'])"/>
131
132  </sect2>
133
134  <sect2 id="i18n-glibc" role="configuration">
135    <title>Internationalization</title>
136
137    <para>The locales that can make the system respond in a different
138    language were not installed by the above command. Install them
139    with:</para>
140
141<screen><userinput>make localedata/install-locales</userinput></screen>
142
143    <para>To save time, an alternative to running the previous command (which
144    generates and installs every locale listed in the
145    glibc-&glibc-version;/localedata/SUPPORTED file) is to install only
146    those locales that are wanted and needed. This can be achieved by using
147    the <command>localedef</command> command. Information on this command is
148    located in the <filename>INSTALL</filename> file in the Glibc source.
149    However, there are a number of locales that are essential in order for the
150    tests of future packages to pass, in particular, the
151    <emphasis>libstdc++</emphasis> tests from GCC. The following instructions,
152    instead of the <parameter>install-locales</parameter> target used above,
153    will install the minimum set of locales necessary for the tests to run
154    successfully:</para>
155
156<screen role="nodump"><userinput>mkdir -pv /usr/lib/locale
157localedef -i de_DE -f ISO-8859-1 de_DE
158localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
159localedef -i en_HK -f ISO-8859-1 en_HK
160localedef -i en_PH -f ISO-8859-1 en_PH
161localedef -i en_US -f ISO-8859-1 en_US
162localedef -i es_MX -f ISO-8859-1 es_MX
163localedef -i fa_IR -f UTF-8 fa_IR
164localedef -i fr_FR -f ISO-8859-1 fr_FR
165localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
166localedef -i it_IT -f ISO-8859-1 it_IT
167localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen>
168
169    <para>Some locales installed by the <command>make
170    localedata/install-locales</command> command above are not properly
171    supported by some applications that are in the CLFS and BLFS books. Because
172    of the various problems that arise due to application programmers making
173    assumptions that break in such locales, CLFS should not be used in locales
174    that utilize multibyte character sets (including UTF-8) or right-to-left
175    writing order.  Numerous unofficial and unstable patches are required to
176    fix these problems, and it has been decided by the CLFS developers not to
177    support such complex locales at this time. This applies to the ja_JP and
178    fa_IR locales as well&mdash;they have been installed only for GCC and
179    Gettext tests to pass, and the <command>watch</command> program (part of
180    the Procps package) does not work properly in them. Various attempts to
181    circumvent these restrictions are documented in internationalization-related
182    hints.</para>
183
184  </sect2>
185
186  <sect2 id="conf-glibc" role="configuration">
187    <title>Configuring Glibc</title>
188
189    <indexterm zone="conf-glibc">
190      <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
191    </indexterm>
192
193    <indexterm zone="conf-glibc">
194      <primary sortas="e-/etc/localtime">/etc/localtime</primary>
195    </indexterm>
196
197    <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
198    because, although Glibc provides defaults when this file is missing or
199    corrupt, the Glibc defaults do not work well in a networked environment.
200    The time zone also needs to be configured.</para>
201
202    <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running
203    the following:</para>
204
205<screen><userinput>cat &gt; /etc/nsswitch.conf &lt;&lt; "EOF"
206<literal># Begin /etc/nsswitch.conf
207
208passwd: files
209group: files
210shadow: files
211
212hosts: files dns
213networks: files
214
215protocols: files
216services: files
217ethers: files
218rpc: files
219
220# End /etc/nsswitch.conf</literal>
221EOF</userinput></screen>
222
223    <para>To determine the local time zone, run the following script:</para>
224
225<screen role="nodump"><userinput>tzselect</userinput></screen>
226
227    <para>After answering a few questions about the location, the script will
228    output the name of the time zone (e.g., <emphasis>EST5EDT</emphasis> or
229    <emphasis>Canada/Eastern</emphasis>). Then create the
230    <filename>/etc/localtime</filename> file by running:</para>
231
232<screen><userinput>cp -v --remove-destination /usr/share/zoneinfo/<replaceable>[xxx]</replaceable> \
233    /etc/localtime</userinput></screen>
234
235    <para>Replace <replaceable>[xxx]</replaceable> with the name of the time zone
236    that <command>tzselect</command> provided (e.g., Canada/Eastern).</para>
237
238  </sect2>
239
240  <sect2 id="conf-ld" role="configuration">
241    <title>Configuring The Dynamic Loader</title>
242
243    <indexterm zone="conf-ld">
244      <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
245    </indexterm>
246
247    <para>By default, the dynamic loader (<filename
248    class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
249    <filename class="directory">/lib</filename> and <filename
250    class="directory">/usr/lib</filename> for dynamic libraries that are
251    needed by programs as they are run. However, if there are libraries in
252    directories other than <filename class="directory">/lib</filename> and
253    <filename class="directory">/usr/lib</filename>, these need to be
254    added to the <filename>/etc/ld.so.conf</filename> file in order
255    for the dynamic loader to find them. Two directories that are commonly
256    known to contain additional libraries are <filename
257    class="directory">/usr/local/lib</filename> and <filename
258    class="directory">/opt/lib</filename>, so add those directories to the
259    dynamic loader's search path.</para>
260
261    <para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
262    following:</para>
263
264<screen><userinput>cat &gt; /etc/ld.so.conf &lt;&lt; "EOF"
265<literal># Begin /etc/ld.so.conf
266
267/usr/local/lib
268/opt/lib
269
270# End /etc/ld.so.conf</literal>
271EOF</userinput></screen>
272
273  </sect2>
274
275  <sect2 id="contents-glibc" role="content">
276    <title>Contents of Glibc</title>
277
278    <segmentedlist>
279      <segtitle>Installed programs</segtitle>
280      <segtitle>Installed libraries</segtitle>
281
282      <seglistitem>
283        <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
284        ldd, lddlibc4, locale, localedef, mtrace, nscd,
285        pcprofiledump, pt_chown, rpcgen, rpcinfo, sln, sprof, tzselect, xtrace,
286        zdump, and zic</seg>
287        <seg>ld.so, libBrokenLocale.[a,so], libSegFault.so, libanl.[a,so],
288        libbsd-compat.a, libc.[a,so], libcrypt.[a,so], libdl.[a,so], libg.a,
289        libieee.a, libm.[a,so], libmcheck.a, libmemusage.so, libnsl.a,
290        libnss_compat.so, libnss_dns.so, libnss_files.so, libnss_hesiod.so,
291        libnss_nis.so, libnss_nisplus.so, libpcprofile.so, libpthread.[a,so],
292        libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so, and
293        libutil.[a,so]</seg>
294      </seglistitem>
295    </segmentedlist>
296
297    <variablelist>
298      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
299      <?dbfo list-presentation="list"?>
300      <?dbhtml list-presentation="table"?>
301
302      <varlistentry id="catchsegv">
303        <term><command>catchsegv</command></term>
304        <listitem>
305          <para>Can be used to create a stack trace when a program
306          terminates with a segmentation fault</para>
307          <indexterm zone="ch-system-glibc catchsegv">
308            <primary sortas="b-catchsegv">catchsegv</primary>
309          </indexterm>
310        </listitem>
311      </varlistentry>
312
313      <varlistentry id="gencat">
314        <term><command>gencat</command></term>
315        <listitem>
316          <para>Generates message catalogues</para>
317          <indexterm zone="ch-system-glibc gencat">
318            <primary sortas="b-gencat">gencat</primary>
319          </indexterm>
320        </listitem>
321      </varlistentry>
322
323      <varlistentry id="getconf">
324        <term><command>getconf</command></term>
325        <listitem>
326          <para>Displays the system configuration values for file system specific
327          variables</para>
328          <indexterm zone="ch-system-glibc getconf">
329            <primary sortas="b-getconf">getconf</primary>
330          </indexterm>
331        </listitem>
332      </varlistentry>
333
334      <varlistentry id="getent">
335        <term><command>getent</command></term>
336        <listitem>
337          <para>Gets entries from an administrative database</para>
338          <indexterm zone="ch-system-glibc getent">
339            <primary sortas="b-getent">getent</primary>
340          </indexterm>
341        </listitem>
342      </varlistentry>
343
344      <varlistentry id="iconv">
345        <term><command>iconv</command></term>
346        <listitem>
347          <para>Performs character set conversion</para>
348          <indexterm zone="ch-system-glibc iconv">
349            <primary sortas="b-iconv">iconv</primary>
350          </indexterm>
351        </listitem>
352      </varlistentry>
353
354      <varlistentry id="iconvconfig">
355        <term><command>iconvconfig</command></term>
356        <listitem>
357          <para>Creates fastloading <command>iconv</command> module configuration
358          files</para>
359          <indexterm zone="ch-system-glibc iconvconfig">
360            <primary sortas="b-iconvconfig">iconvconfig</primary>
361          </indexterm>
362        </listitem>
363      </varlistentry>
364
365      <varlistentry id="ldconfig">
366        <term><command>ldconfig</command></term>
367        <listitem>
368          <para>Configures the dynamic linker runtime bindings</para>
369          <indexterm zone="ch-system-glibc ldconfig">
370            <primary sortas="b-ldconfig">ldconfig</primary>
371          </indexterm>
372        </listitem>
373      </varlistentry>
374
375      <varlistentry id="ldd">
376        <term><command>ldd</command></term>
377        <listitem>
378          <para>Reports which shared libraries are required
379          by each given program or shared library</para>
380          <indexterm zone="ch-system-glibc ldd">
381            <primary sortas="b-ldd">ldd</primary>
382          </indexterm>
383        </listitem>
384      </varlistentry>
385
386      <varlistentry id="lddlibc4">
387        <term><command>lddlibc4</command></term>
388        <listitem>
389          <para>Assists <command>ldd</command> with object files</para>
390          <indexterm zone="ch-system-glibc lddlibc4">
391            <primary sortas="b-lddlibc4">lddlibc4</primary>
392          </indexterm>
393        </listitem>
394      </varlistentry>
395
396      <varlistentry id="locale">
397        <term><command>locale</command></term>
398        <listitem>
399          <para>Tells the compiler to enable or disable the use of POSIX locales
400          for built-in operations</para>
401          <indexterm zone="ch-system-glibc locale">
402            <primary sortas="b-locale">locale</primary>
403          </indexterm>
404        </listitem>
405      </varlistentry>
406
407      <varlistentry id="localedef">
408        <term><command>localedef</command></term>
409        <listitem>
410          <para>Compiles locale specifications</para>
411          <indexterm zone="ch-system-glibc localedef">
412            <primary sortas="b-localedef">localedef</primary>
413          </indexterm>
414        </listitem>
415      </varlistentry>
416
417      <varlistentry id="mtrace">
418        <term><command>mtrace</command></term>
419        <listitem>
420          <para>Reads and interprets a memory trace file and
421          displays a summary in human-readable format</para>
422          <indexterm zone="ch-system-glibc mtrace">
423            <primary sortas="b-mtrace">mtrace</primary>
424          </indexterm>
425        </listitem>
426      </varlistentry>
427
428      <varlistentry id="nscd">
429        <term><command>nscd</command></term>
430        <listitem>
431          <para>A daemon that provides a cache for the most common name
432          service requests</para>
433          <indexterm zone="ch-system-glibc nscd">
434            <primary sortas="b-nscd">nscd</primary>
435          </indexterm>
436        </listitem>
437      </varlistentry>
438
439      <varlistentry id="pcprofiledump">
440        <term><command>pcprofiledump</command></term>
441        <listitem>
442          <para>Dumps information generated by PC profiling</para>
443          <indexterm zone="ch-system-glibc pcprofiledump">
444            <primary sortas="b-pcprofiledump">pcprofiledump</primary>
445          </indexterm>
446        </listitem>
447      </varlistentry>
448
449      <varlistentry id="pt_chown">
450        <term><command>pt_chown</command></term>
451        <listitem>
452          <para>A helper program for <command>grantpt</command> to set the owner,
453          group and access permissions of a slave pseudo terminal</para>
454          <indexterm zone="ch-system-glibc pt_chown">
455            <primary sortas="b-pt_chown">pt_chown</primary>
456          </indexterm>
457        </listitem>
458      </varlistentry>
459
460      <varlistentry id="rpcgen">
461        <term><command>rpcgen</command></term>
462        <listitem>
463          <para>Generates C code to implement the Remote Procecure Call (RPC)
464          protocol</para>
465          <indexterm zone="ch-system-glibc rpcgen">
466            <primary sortas="b-rpcgen">rpcgen</primary>
467          </indexterm>
468        </listitem>
469      </varlistentry>
470
471      <varlistentry id="rpcinfo">
472        <term><command>rpcinfo</command></term>
473        <listitem>
474          <para>Makes an RPC call to an RPC server</para>
475          <indexterm zone="ch-system-glibc rpcinfo">
476            <primary sortas="b-rpcinfo">rpcinfo</primary>
477          </indexterm>
478        </listitem>
479      </varlistentry>
480
481      <varlistentry id="sln">
482        <term><command>sln</command></term>
483        <listitem>
484          <para>A statically linked program that creates symbolic links</para>
485          <indexterm zone="ch-system-glibc sln">
486            <primary sortas="b-sln">sln</primary>
487          </indexterm>
488        </listitem>
489      </varlistentry>
490
491      <varlistentry id="sprof">
492        <term><command>sprof</command></term>
493        <listitem>
494          <para>Reads and displays shared object profiling data</para>
495          <indexterm zone="ch-system-glibc sprof">
496            <primary sortas="b-sprof">sprof</primary>
497          </indexterm>
498        </listitem>
499      </varlistentry>
500
501      <varlistentry id="tzselect">
502        <term><command>tzselect</command></term>
503        <listitem>
504          <para>Asks the user about the location of the
505          system and reports the corresponding time zone description</para>
506          <indexterm zone="ch-system-glibc tzselect">
507            <primary sortas="b-tzselect">tzselect</primary>
508          </indexterm>
509        </listitem>
510      </varlistentry>
511
512      <varlistentry id="xtrace">
513        <term><command>xtrace</command></term>
514        <listitem>
515          <para>Traces the execution of a program by
516          printing the currently executed function</para>
517          <indexterm zone="ch-system-glibc xtrace">
518            <primary sortas="b-xtrace">xtrace</primary>
519          </indexterm>
520        </listitem>
521      </varlistentry>
522
523      <varlistentry id="zdump">
524        <term><command>zdump</command></term>
525        <listitem>
526          <para>The time zone dumper</para>
527          <indexterm zone="ch-system-glibc zdump">
528            <primary sortas="b-zdump">zdump</primary>
529          </indexterm>
530        </listitem>
531      </varlistentry>
532
533      <varlistentry id="zic">
534        <term><command>zic</command></term>
535        <listitem>
536          <para>The time zone compiler</para>
537          <indexterm zone="ch-system-glibc zic">
538            <primary sortas="b-zic">zic</primary>
539          </indexterm>
540        </listitem>
541      </varlistentry>
542
543      <varlistentry id="ld.so">
544        <term><filename class="libraryfile">ld.so</filename></term>
545        <listitem>
546          <para>The helper program for shared library executables</para>
547          <indexterm zone="ch-system-glibc ld.so">
548            <primary sortas="c-ld.so">ld.so</primary>
549          </indexterm>
550        </listitem>
551      </varlistentry>
552
553      <varlistentry id="libBrokenLocale">
554        <term><filename class="libraryfile">libBrokenLocale</filename></term>
555        <listitem>
556          <para>Used by programs, such as Mozilla, to solve broken locales</para>
557          <indexterm zone="ch-system-glibc libBrokenLocale">
558            <primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
559          </indexterm>
560        </listitem>
561      </varlistentry>
562
563      <varlistentry id="libSegFault">
564        <term><filename class="libraryfile">libSegFault</filename></term>
565        <listitem>
566          <para>The segmentation fault signal handler</para>
567          <indexterm zone="ch-system-glibc libSegFault">
568            <primary sortas="c-libSegFault">libSegFault</primary>
569          </indexterm>
570        </listitem>
571      </varlistentry>
572
573      <varlistentry id="libanl">
574        <term><filename class="libraryfile">libanl</filename></term>
575        <listitem>
576          <para>An asynchronous name lookup library</para>
577          <indexterm zone="ch-system-glibc libanl">
578            <primary sortas="c-libanl">libanl</primary>
579          </indexterm>
580        </listitem>
581      </varlistentry>
582
583      <varlistentry id="libbsd-compat">
584        <term><filename class="libraryfile">libbsd-compat</filename></term>
585        <listitem>
586          <para>Provides the portability needed
587          in order to run certain Berkey Software Distribution (BSD) programs
588          under Linux</para>
589          <indexterm zone="ch-system-glibc libbsd-compat">
590            <primary sortas="c-libbsd-compat">libbsd-compat</primary>
591          </indexterm>
592        </listitem>
593      </varlistentry>
594
595      <varlistentry id="libc">
596        <term><filename class="libraryfile">libc</filename></term>
597        <listitem>
598          <para>The main C library</para>
599          <indexterm zone="ch-system-glibc libc">
600            <primary sortas="c-libc">libc</primary>
601          </indexterm>
602        </listitem>
603      </varlistentry>
604
605      <varlistentry id="libcrypt">
606        <term><filename class="libraryfile">libcrypt</filename></term>
607        <listitem>
608          <para>The cryptography library</para>
609          <indexterm zone="ch-system-glibc libcrypt">
610            <primary sortas="c-libcrypt">libcrypt</primary>
611          </indexterm>
612        </listitem>
613      </varlistentry>
614
615      <varlistentry id="libdl">
616        <term><filename class="libraryfile">libdl</filename></term>
617        <listitem>
618          <para>The dynamic linking interface library</para>
619          <indexterm zone="ch-system-glibc libdl">
620            <primary sortas="c-libdl">libdl</primary>
621          </indexterm>
622        </listitem>
623      </varlistentry>
624
625      <varlistentry id="libg">
626        <term><filename class="libraryfile">libg</filename></term>
627        <listitem>
628          <para>A runtime library for <command>g++</command></para>
629          <indexterm zone="ch-system-glibc libg">
630            <primary sortas="c-libg">libg</primary>
631          </indexterm>
632        </listitem>
633      </varlistentry>
634
635      <varlistentry id="libieee">
636        <term><filename class="libraryfile">libieee</filename></term>
637        <listitem>
638          <para>The Institute of Electrical and Electronic Engineers (IEEE)
639          floating point library</para>
640          <indexterm zone="ch-system-glibc libieee">
641            <primary sortas="c-libieee">libieee</primary>
642          </indexterm>
643        </listitem>
644      </varlistentry>
645
646      <varlistentry id="libm">
647        <term><filename class="libraryfile">libm</filename></term>
648        <listitem>
649          <para>The mathematical library</para>
650          <indexterm zone="ch-system-glibc libm">
651            <primary sortas="c-libm">libm</primary>
652          </indexterm>
653        </listitem>
654      </varlistentry>
655
656      <varlistentry id="libmcheck">
657        <term><filename class="libraryfile">libmcheck</filename></term>
658        <listitem>
659          <para>Contains code run at boot</para>
660          <indexterm zone="ch-system-glibc libmcheck">
661            <primary sortas="c-libmcheck">libmcheck</primary>
662          </indexterm>
663        </listitem>
664      </varlistentry>
665
666      <varlistentry id="libmemusage">
667        <term><filename class="libraryfile">libmemusage</filename></term>
668        <listitem>
669          <para>Used by <command>memusage</command> (included in Glibc, but
670          not built in a base CLFS system as it has additional dependencies)
671          to help collect information about the memory usage of a program</para>
672          <indexterm zone="ch-system-glibc libmemusage">
673            <primary sortas="c-libmemusage">libmemusage</primary>
674          </indexterm>
675        </listitem>
676      </varlistentry>
677
678      <varlistentry id="libnsl">
679        <term><filename class="libraryfile">libnsl</filename></term>
680        <listitem>
681          <para>The network services library</para>
682          <indexterm zone="ch-system-glibc libnsl">
683            <primary sortas="c-libnsl">libnsl</primary>
684          </indexterm>
685        </listitem>
686      </varlistentry>
687
688      <varlistentry id="libnss">
689        <term><filename class="libraryfile">libnss</filename></term>
690        <listitem>
691          <para>The Name Service Switch libraries, containing functions for
692          resolving host names, user names, group names, aliases, services,
693          protocols, etc.</para>
694          <indexterm zone="ch-system-glibc libnss">
695            <primary sortas="c-libnss">libnss</primary>
696          </indexterm>
697        </listitem>
698      </varlistentry>
699
700      <varlistentry id="libpcprofile">
701        <term><filename class="libraryfile">libpcprofile</filename></term>
702        <listitem>
703          <para>Contains profiling functions used to track the amount of CPU
704          time spent in specific source code lines</para>
705          <indexterm zone="ch-system-glibc libpcprofile">
706            <primary sortas="c-libpcprofile">libpcprofile</primary>
707          </indexterm>
708        </listitem>
709      </varlistentry>
710
711      <varlistentry id="libpthread">
712        <term><filename class="libraryfile">libpthread</filename></term>
713        <listitem>
714          <para>The POSIX threads library</para>
715          <indexterm zone="ch-system-glibc libpthread">
716            <primary sortas="c-libpthread">libpthread</primary>
717          </indexterm>
718        </listitem>
719      </varlistentry>
720
721      <varlistentry id="libresolv">
722        <term><filename class="libraryfile">libresolv</filename></term>
723        <listitem>
724          <para>Contains functions for creating, sending, and interpreting
725          packets to the Internet domain name servers</para>
726          <indexterm zone="ch-system-glibc libresolv">
727            <primary sortas="c-libresolv">libresolv</primary>
728          </indexterm>
729        </listitem>
730      </varlistentry>
731
732      <varlistentry id="librpcsvc">
733        <term><filename class="libraryfile">librpcsvc</filename></term>
734        <listitem>
735          <para>Contains functions providing miscellaneous RPC services</para>
736          <indexterm zone="ch-system-glibc librpcsvc">
737            <primary sortas="c-librpcsvc">librpcsvc</primary>
738          </indexterm>
739        </listitem>
740      </varlistentry>
741
742      <varlistentry id="librt">
743        <term><filename class="libraryfile">librt</filename></term>
744        <listitem>
745          <para>Contains functions providing most of the interfaces specified by
746          the POSIX.1b Realtime Extension</para>
747          <indexterm zone="ch-system-glibc librt">
748            <primary sortas="c-librt">librt</primary>
749          </indexterm>
750        </listitem>
751      </varlistentry>
752
753      <varlistentry id="libthread_db">
754        <term><filename class="libraryfile">libthread_db</filename></term>
755        <listitem>
756          <para>Contains functions useful for
757          building debuggers for multi-threaded programs</para>
758          <indexterm zone="ch-system-glibc libthread_db">
759            <primary sortas="c-libthread_db">libthread_db</primary>
760          </indexterm>
761        </listitem>
762      </varlistentry>
763
764      <varlistentry id="libutil">
765        <term><filename class="libraryfile">libutil</filename></term>
766        <listitem>
767          <para>Contains code for <quote>standard</quote> functions used in
768          many different Unix utilities</para>
769          <indexterm zone="ch-system-glibc libutil">
770            <primary sortas="c-libutil">libutil</primary>
771          </indexterm>
772        </listitem>
773      </varlistentry>
774
775    </variablelist>
776
777  </sect2>
778
779</sect1>
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