source: chapter06/glibc.xml@ 35cc66f

10.0 10.0-rc1 10.1 10.1-rc1 11.0 11.0-rc1 11.0-rc2 11.0-rc3 11.1 11.1-rc1 7.10 7.10-rc1 7.9 7.9-rc1 7.9-rc2 8.0 8.0-rc1 8.1 8.1-rc1 8.1-rc2 8.2 8.2-rc1 8.3 8.3-rc1 8.3-rc2 8.4 8.4-rc1 9.0 9.0-rc1 9.1 9.1-rc1 BOOK.old arm cross-chap5 ml-11.0 multilib nosym old-trunk trunk xry111/clfs-ng xry111/git-transition xry111/glibc-2.34 xry111/lfs-next xry111/tester-nohack xry111/usr-move
Last change on this file since 35cc66f was 35cc66f, checked in by Bruce Dubbs <bdubbs@…>, 7 years ago

Add glibc-2.22-largefile-1.patch.
Update to linux-4.3.
Update to iproute2-4.3.0.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10971 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/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 <sect1info condition="script">
12 <productname>glibc</productname>
13 <productnumber>&glibc-version;</productnumber>
14 <address>&glibc-url;</address>
15 </sect1info>
16
17 <title>Glibc-&glibc-version;</title>
18
19 <indexterm zone="ch-system-glibc">
20 <primary sortas="a-Glibc">Glibc</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Glibc package contains the main C library. This library provides
27 the basic routines for allocating memory, searching directories, opening and
28 closing files, reading and writing files, string handling, pattern matching,
29 arithmetic, and so on.</para>
30
31 <segmentedlist>
32 <segtitle>&buildtime;</segtitle>
33 <segtitle>&diskspace;</segtitle>
34
35 <seglistitem>
36 <seg>&glibc-ch6-sbu;</seg>
37 <seg>&glibc-ch6-du;</seg>
38 </seglistitem>
39 </segmentedlist>
40
41 </sect2>
42
43 <sect2 role="installation">
44 <title>Installation of Glibc</title>
45
46 <note>
47 <para>Some packages outside of LFS suggest installing GNU libiconv in
48 order to translate data from one encoding to another. The project's
49 home page (<ulink url="http://www.gnu.org/software/libiconv/"/>) says
50 <quote>This library provides an <function>iconv()</function>
51 implementation, for use on systems which don't have one, or whose
52 implementation cannot convert from/to Unicode.</quote> Glibc provides
53 an <function>iconv()</function> implementation and can convert from/to
54 Unicode, therefore libiconv is not required on an LFS system.</para>
55 </note>
56
57 <para>Some of the Glibc programs use non-FHS compilant
58 <filename class="directory">/var/db</filename> directory to store
59 their runtime data. Apply the following patch to make such programs
60 store their runtime data in the FHS-compliant locations:</para>
61
62<screen><userinput remap="pre">patch -Np1 -i ../&glibc-fhs-patch;</userinput></screen>
63
64 <para>The Glibc build system is self-contained and will install
65 perfectly, even though the compiler specs file and linker are still
66 pointing at <filename class="directory">/tools</filename>. The specs
67 and linker cannot be adjusted before the Glibc install because the
68 Glibc autoconf tests would give false results and defeat the goal
69 of achieving a clean build.</para>
70
71 <para>Now fix a build problem that affects i386 systems:</para>
72
73<screen><userinput remap="pre">patch -Np1 -i ../&glibc-upstream-patch;</userinput></screen>
74
75 <para>The most recent stable version of Glibc does not handle large files
76 correctly. Fix the problem with this patch:</para>
77
78<screen><userinput remap="pre">patch -Np1 -i ../&glibc-largefile-patch;</userinput></screen>
79
80 <para>The Glibc documentation recommends building Glibc outside of the source
81 directory in a dedicated build directory:</para>
82
83<screen><userinput remap="pre">mkdir -v ../glibc-build
84cd ../glibc-build</userinput></screen>
85
86 <para>Prepare Glibc for compilation:</para>
87
88<screen><userinput remap="configure">../glibc-&glibc-version;/configure \
89 --prefix=/usr \
90 --disable-profile \
91 --enable-kernel=&min-kernel; \
92 --enable-obsolete-rpc</userinput></screen>
93
94 <para>Compile the package:</para>
95
96<screen><userinput remap="make">make</userinput></screen>
97
98 <important>
99 <para>In this section, the test suite for Glibc is considered critical.
100 Do not skip it under any circumstance.</para>
101 </important>
102
103 <para>Generally a few tests do not pass, but you can generally ignore
104 any of the test failures listed below. Now test the build results:</para>
105
106<screen><userinput remap="test">make check</userinput></screen>
107
108 <para>You will probably see some test failures. The Glibc test suite is
109 somewhat dependent on the host system. This is a list of the most common
110 issues seen for this version of LFS:</para>
111
112 <itemizedlist>
113
114 <listitem>
115 <para><emphasis>posix/tst-getaddrinfo4</emphasis> will always fail due
116 to not having the necessary networking applications when the tests are
117 run.</para>
118 </listitem>
119
120 <listitem>
121 <para>The <emphasis>tst/tst-cputimer1</emphasis> and
122 <emphasis>rt/tst-cpuclock2</emphasis> tests have been known to
123 fail. The reason is not completely understood, but indications are
124 that minor timing issues can trigger these failures.</para>
125 </listitem>
126
127 <listitem>
128 <para>The math tests sometimes fail when running on
129 systems where the CPU is not a relatively new genuine Intel or
130 authentic AMD processor.</para>
131 </listitem>
132
133 <listitem>
134 <para>The <emphasis>elf/tst-protected1a</emphasis> and
135 <emphasis>elf/tst-protected1b</emphasis> tests are known to
136 fail with the current stable version of binutils.</para>
137 </listitem>
138<!--
139 <listitem>
140 <para>When running on older and slower hardware or on systems under
141 load, some tests can fail because of test timeouts being exceeded.
142 Modifying the make check command to set a TIMEOUTFACTOR is reported to
143 help eliminate these errors (e.g. <command>TIMEOUTFACTOR=16
144 make -k check</command>).</para>
145 </listitem>
146-->
147<!--
148 <listitem>
149 <para>libio/tst-ftell-partial-wide.out fails because it needs a locale
150 that has not yet been generated.</para>
151 </listitem>
152-->
153 <listitem>
154 <para>Other tests known to fail on some architectures are
155 malloc/tst-malloc-usable and nptl/tst-cleanupx4. </para>
156 </listitem>
157
158 </itemizedlist>
159
160 <para>Though it is a harmless message, the install stage of Glibc will
161 complain about the absence of <filename>/etc/ld.so.conf</filename>.
162 Prevent this warning with:</para>
163
164<screen><userinput remap="install">touch /etc/ld.so.conf</userinput></screen>
165
166 <para>Install the package:</para>
167
168<screen><userinput remap="install">make install</userinput></screen>
169
170 <para>Install the configuration file and runtime directory for
171 <command>nscd</command>:</para>
172
173<screen><userinput remap="install">cp -v ../glibc-&glibc-version;/nscd/nscd.conf /etc/nscd.conf
174mkdir -pv /var/cache/nscd</userinput></screen>
175
176 <para>The locales that can make the system respond in a different language
177 were not installed by the above command. None of the locales are required,
178 but if some of them are missing, test suites of the future packages would
179 skip important testcases.</para>
180
181 <para>Individual locales can be installed using the
182 <command>localedef</command> program. E.g., the first
183 <command>localedef</command> command below combines the
184 <filename>/usr/share/i18n/locales/cs_CZ</filename>
185 charset-independent locale definition with the
186 <filename>/usr/share/i18n/charmaps/UTF-8.gz</filename>
187 charmap definition and appends the result to the
188 <filename>/usr/lib/locale/locale-archive</filename> file.
189 The following instructions will install the minimum set of
190 locales necessary for the optimal coverage of tests:</para>
191
192<screen role="nodump"><userinput remap="locale-test">mkdir -pv /usr/lib/locale
193localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
194localedef -i de_DE -f ISO-8859-1 de_DE
195localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
196localedef -i de_DE -f UTF-8 de_DE.UTF-8
197localedef -i en_GB -f UTF-8 en_GB.UTF-8
198localedef -i en_HK -f ISO-8859-1 en_HK
199localedef -i en_PH -f ISO-8859-1 en_PH
200localedef -i en_US -f ISO-8859-1 en_US
201localedef -i en_US -f UTF-8 en_US.UTF-8
202localedef -i es_MX -f ISO-8859-1 es_MX
203localedef -i fa_IR -f UTF-8 fa_IR
204localedef -i fr_FR -f ISO-8859-1 fr_FR
205localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
206localedef -i fr_FR -f UTF-8 fr_FR.UTF-8
207localedef -i it_IT -f ISO-8859-1 it_IT
208localedef -i it_IT -f UTF-8 it_IT.UTF-8
209localedef -i ja_JP -f EUC-JP ja_JP
210localedef -i ru_RU -f KOI8-R ru_RU.KOI8-R
211localedef -i ru_RU -f UTF-8 ru_RU.UTF-8
212localedef -i tr_TR -f UTF-8 tr_TR.UTF-8
213localedef -i zh_CN -f GB18030 zh_CN.GB18030</userinput></screen>
214
215 <para>In addition, install the locale for your own country, language and
216 character set.</para>
217
218 <para>Alternatively, install all locales listed in the
219 <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
220 (it includes every locale listed above and many more) at once with the
221 following time-consuming command:</para>
222
223<screen><userinput remap="locale-full">make localedata/install-locales</userinput></screen>
224
225 <para>Then use the <command>localedef</command> command to create and
226 install locales not listed in the
227 <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
228 in the unlikely case you need them.</para>
229
230 </sect2>
231
232 <sect2 id="conf-glibc" role="configuration">
233 <title>Configuring Glibc</title>
234
235 <indexterm zone="conf-glibc">
236 <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
237 </indexterm>
238
239 <indexterm zone="conf-glibc">
240 <primary sortas="e-/etc/localtime">/etc/localtime</primary>
241 </indexterm>
242
243 <sect3>
244 <title>Adding nsswitch.conf</title>
245
246 <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
247 because the Glibc defaults do not work well in a networked environment.
248 </para>
249
250 <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running the
251 following:</para>
252
253<screen><userinput>cat &gt; /etc/nsswitch.conf &lt;&lt; "EOF"
254<literal># Begin /etc/nsswitch.conf
255
256passwd: files
257group: files
258shadow: files
259
260hosts: files dns
261networks: files
262
263protocols: files
264services: files
265ethers: files
266rpc: files
267
268# End /etc/nsswitch.conf</literal>
269EOF</userinput></screen>
270
271 </sect3>
272
273 <sect3>
274 <title>Adding time zone data</title>
275
276 <para>Install and set up the time zone data with the following:</para>
277<screen><userinput>tar -xf ../tzdata&tzdata-version;.tar.gz
278
279ZONEINFO=/usr/share/zoneinfo
280mkdir -pv $ZONEINFO/{posix,right}
281
282for tz in etcetera southamerica northamerica europe africa antarctica \
283 asia australasia backward pacificnew systemv; do
284 zic -L /dev/null -d $ZONEINFO -y "sh yearistype.sh" ${tz}
285 zic -L /dev/null -d $ZONEINFO/posix -y "sh yearistype.sh" ${tz}
286 zic -L leapseconds -d $ZONEINFO/right -y "sh yearistype.sh" ${tz}
287done
288
289cp -v zone.tab zone1970.tab iso3166.tab $ZONEINFO
290zic -d $ZONEINFO -p America/New_York
291unset ZONEINFO</userinput></screen>
292
293 <variablelist>
294 <title>The meaning of the zic commands:</title>
295
296 <varlistentry>
297 <term><parameter>zic -L /dev/null ...</parameter></term>
298 <listitem>
299 <para>This creates posix time zones, without any leap seconds. It is
300 conventional to put these in both
301 <filename class="directory">zoneinfo</filename> and
302 <filename class="directory">zoneinfo/posix</filename>. It is
303 necessary to put the POSIX time zones in
304 <filename class="directory">zoneinfo</filename>, otherwise various
305 test-suites will report errors. On an embedded system, where space is
306 tight and you do not intend to ever update the time zones, you could save
307 1.9MB by not using the <filename class="directory">posix</filename>
308 directory, but some applications or test-suites might produce some
309 failures.</para>
310 </listitem>
311 </varlistentry>
312 <varlistentry>
313 <term><parameter>zic -L leapseconds ...</parameter></term>
314 <listitem>
315 <para>This creates right time zones, including leap seconds. On an
316 embedded system, where space is tight and you do not intend to
317 ever update the time zones, or care about the correct time, you could
318 save 1.9MB by omitting the <filename class="directory">right</filename>
319 directory.</para>
320 </listitem>
321 </varlistentry>
322 <varlistentry>
323 <term><parameter>zic ... -p ...</parameter></term>
324 <listitem>
325 <para>This creates the <filename>posixrules</filename> file. We use
326 New York because POSIX requires the daylight savings time rules
327 to be in accordance with US rules.</para>
328 </listitem>
329 </varlistentry>
330 </variablelist>
331
332
333 <para>One way to determine the local time zone is to run the following
334 script:</para>
335
336<screen role="nodump"><userinput>tzselect</userinput></screen>
337
338 <para>After answering a few questions about the location, the script will
339 output the name of the time zone (e.g.,
340 <emphasis>America/Edmonton</emphasis>). There are also some other possible
341 time zones listed in <filename
342 class='directory'>/usr/share/zoneinfo</filename> such as
343 <emphasis>Canada/Eastern</emphasis> or <emphasis>EST5EDT</emphasis> that
344 are not identified by the script but can be used.</para>
345
346 <para>Then create the <filename>/etc/localtime</filename> file by
347 running:</para>
348
349<screen><userinput>cp -v /usr/share/zoneinfo/<replaceable>&lt;xxx&gt;</replaceable> /etc/localtime</userinput></screen>
350
351 <para>Replace <replaceable>&lt;xxx&gt;</replaceable> with the name of the
352 time zone selected (e.g., Canada/Eastern).</para>
353
354 </sect3>
355
356 <sect3 id="conf-ld" role="configuration">
357 <title>Configuring the Dynamic Loader</title>
358
359 <indexterm zone="conf-ld">
360 <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
361 </indexterm>
362
363 <para>By default, the dynamic loader (<filename
364 class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
365 <filename class="directory">/lib</filename> and <filename
366 class="directory">/usr/lib</filename> for dynamic libraries that are
367 needed by programs as they are run. However, if there are libraries in
368 directories other than <filename class="directory">/lib</filename> and
369 <filename class="directory">/usr/lib</filename>, these need to be added
370 to the <filename>/etc/ld.so.conf</filename> file in order for the
371 dynamic loader to find them. Two directories that are commonly known
372 to contain additional libraries are <filename
373 class="directory">/usr/local/lib</filename> and <filename
374 class="directory">/opt/lib</filename>, so add those directories to the
375 dynamic loader's search path.</para>
376
377 <para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
378 following:</para>
379
380<screen><userinput>cat &gt; /etc/ld.so.conf &lt;&lt; "EOF"
381<literal># Begin /etc/ld.so.conf
382/usr/local/lib
383/opt/lib
384</literal>
385EOF</userinput></screen>
386
387 <para>If desired, the dynamic loader can also search a directory and
388 include the contents of files found there. Generally the files in
389 this include directory are one line specifying the desired library path.
390 To add this capability run the following commands:</para>
391
392<screen role="nodump"><userinput>cat &gt;&gt; /etc/ld.so.conf &lt;&lt; "EOF"
393<literal># Add an include directory
394include /etc/ld.so.conf.d/*.conf
395</literal>
396EOF
397mkdir -pv /etc/ld.so.conf.d</userinput></screen>
398
399 </sect3>
400 </sect2>
401
402 <sect2 id="contents-glibc" role="content">
403 <title>Contents of Glibc</title>
404
405 <segmentedlist>
406 <segtitle>Installed programs</segtitle>
407 <segtitle>Installed libraries</segtitle>
408 <segtitle>Installed directories</segtitle>
409
410 <seglistitem>
411 <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
412 ldd, lddlibc4, locale, localedef, makedb, mtrace, nscd, pcprofiledump,
413 pldd, rpcgen, sln, sotruss, sprof, tzselect, xtrace,
414 zdump, and zic</seg>
415 <seg>ld-&glibc-version;.so, libBrokenLocale.{a,so}, libSegFault.so, libanl.{a,so},
416 libc.{a,so}, libc_nonshared.a, libcidn.so,
417 libcrypt.{a,so}, libdl.{a,so}, libg.a, libieee.a, libm.{a,so},
418 libmcheck.a, libmemusage.so, libnsl.{a,so}, libnss_compat.so,
419 libnss_dns.so, libnss_files.so, libnss_hesiod.so, libnss_nis.so,
420 libnss_nisplus.so, libpcprofile.so, libpthread.{a,so},
421 libpthread_nonshared.a, libresolv.{a,so}, librpcsvc.a, librt.{a,so},
422 libthread_db.so, and libutil.{a,so}</seg>
423 <seg>/usr/include/arpa, /usr/include/bits, /usr/include/gnu,
424 /usr/include/net, /usr/include/netash, /usr/include/netatalk,
425 /usr/include/netax25, /usr/include/neteconet, /usr/include/netinet,
426 /usr/include/netipx, /usr/include/netiucv, /usr/include/netpacket,
427 /usr/include/netrom, /usr/include/netrose, /usr/include/nfs,
428 /usr/include/protocols, /usr/include/rpc, /usr/include/rpcsvc,
429 /usr/include/sys, /usr/lib/audit, /usr/lib/gconv, /usr/lib/locale,
430 /usr/libexec/getconf, /usr/share/i18n, /usr/share/zoneinfo,
431 /var/cache/nscd, and /var/lib/nss_db</seg>
432 </seglistitem>
433 </segmentedlist>
434
435 <variablelist>
436 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
437 <?dbfo list-presentation="list"?>
438 <?dbhtml list-presentation="table"?>
439
440 <varlistentry id="catchsegv">
441 <term><command>catchsegv</command></term>
442 <listitem>
443 <para>Can be used to create a stack trace when a program
444 terminates with a segmentation fault</para>
445 <indexterm zone="ch-system-glibc catchsegv">
446 <primary sortas="b-catchsegv">catchsegv</primary>
447 </indexterm>
448 </listitem>
449 </varlistentry>
450
451 <varlistentry id="gencat">
452 <term><command>gencat</command></term>
453 <listitem>
454 <para>Generates message catalogues</para>
455 <indexterm zone="ch-system-glibc gencat">
456 <primary sortas="b-gencat">gencat</primary>
457 </indexterm>
458 </listitem>
459 </varlistentry>
460
461 <varlistentry id="getconf">
462 <term><command>getconf</command></term>
463 <listitem>
464 <para>Displays the system configuration values for file system
465 specific variables</para>
466 <indexterm zone="ch-system-glibc getconf">
467 <primary sortas="b-getconf">getconf</primary>
468 </indexterm>
469 </listitem>
470 </varlistentry>
471
472 <varlistentry id="getent">
473 <term><command>getent</command></term>
474 <listitem>
475 <para>Gets entries from an administrative database</para>
476 <indexterm zone="ch-system-glibc getent">
477 <primary sortas="b-getent">getent</primary>
478 </indexterm>
479 </listitem>
480 </varlistentry>
481
482 <varlistentry id="iconv">
483 <term><command>iconv</command></term>
484 <listitem>
485 <para>Performs character set conversion</para>
486 <indexterm zone="ch-system-glibc iconv">
487 <primary sortas="b-iconv">iconv</primary>
488 </indexterm>
489 </listitem>
490 </varlistentry>
491
492 <varlistentry id="iconvconfig">
493 <term><command>iconvconfig</command></term>
494 <listitem>
495 <para>Creates fastloading <command>iconv</command> module configuration
496 files</para>
497 <indexterm zone="ch-system-glibc iconvconfig">
498 <primary sortas="b-iconvconfig">iconvconfig</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="ldconfig">
504 <term><command>ldconfig</command></term>
505 <listitem>
506 <para>Configures the dynamic linker runtime bindings</para>
507 <indexterm zone="ch-system-glibc ldconfig">
508 <primary sortas="b-ldconfig">ldconfig</primary>
509 </indexterm>
510 </listitem>
511 </varlistentry>
512
513 <varlistentry id="ldd">
514 <term><command>ldd</command></term>
515 <listitem>
516 <para>Reports which shared libraries are required
517 by each given program or shared library</para>
518 <indexterm zone="ch-system-glibc ldd">
519 <primary sortas="b-ldd">ldd</primary>
520 </indexterm>
521 </listitem>
522 </varlistentry>
523
524 <varlistentry id="lddlibc4">
525 <term><command>lddlibc4</command></term>
526 <listitem>
527 <para>Assists <command>ldd</command> with object files</para>
528 <indexterm zone="ch-system-glibc lddlibc4">
529 <primary sortas="b-lddlibc4">lddlibc4</primary>
530 </indexterm>
531 </listitem>
532 </varlistentry>
533
534 <varlistentry id="locale">
535 <term><command>locale</command></term>
536 <listitem>
537 <para>Prints various information about the current locale</para>
538 <indexterm zone="ch-system-glibc locale">
539 <primary sortas="b-locale">locale</primary>
540 </indexterm>
541 </listitem>
542 </varlistentry>
543
544 <varlistentry id="localedef">
545 <term><command>localedef</command></term>
546 <listitem>
547 <para>Compiles locale specifications</para>
548 <indexterm zone="ch-system-glibc localedef">
549 <primary sortas="b-localedef">localedef</primary>
550 </indexterm>
551 </listitem>
552 </varlistentry>
553
554 <varlistentry id="makedb">
555 <term><command>makedb</command></term>
556 <listitem>
557 <para>Creates a simple database from textual input</para>
558 <indexterm zone="ch-system-glibc makedb">
559 <primary sortas="b-makedb">makedb</primary>
560 </indexterm>
561 </listitem>
562 </varlistentry>
563
564 <varlistentry id="mtrace">
565 <term><command>mtrace</command></term>
566 <listitem>
567 <para>Reads and interprets a memory trace file and displays a summary
568 in human-readable format</para>
569 <indexterm zone="ch-system-glibc mtrace">
570 <primary sortas="b-mtrace">mtrace</primary>
571 </indexterm>
572 </listitem>
573 </varlistentry>
574
575 <varlistentry id="nscd">
576 <term><command>nscd</command></term>
577 <listitem>
578 <para>A daemon that provides a cache for the most common name
579 service requests</para>
580 <indexterm zone="ch-system-glibc nscd">
581 <primary sortas="b-nscd">nscd</primary>
582 </indexterm>
583 </listitem>
584 </varlistentry>
585
586 <varlistentry id="pcprofiledump">
587 <term><command>pcprofiledump</command></term>
588 <listitem>
589 <para>Dumps information generated by PC profiling</para>
590 <indexterm zone="ch-system-glibc pcprofiledump">
591 <primary sortas="b-pcprofiledump">pcprofiledump</primary>
592 </indexterm>
593 </listitem>
594 </varlistentry>
595
596 <varlistentry id="pldd">
597 <term><command>pldd</command></term>
598 <listitem>
599 <para>Lists dynamic shared objects used by running processes</para>
600 <indexterm zone="ch-system-glibc pldd">
601 <primary sortas="b-pldd">pldd</primary>
602 </indexterm>
603 </listitem>
604 </varlistentry>
605<!--
606 <varlistentry id="pt_chown">
607 <term><command>pt_chown</command></term>
608 <listitem>
609 <para>A helper program for <command>grantpt</command> to set the owner,
610 group and access permissions of a slave pseudo terminal</para>
611 <indexterm zone="ch-system-glibc pt_chown">
612 <primary sortas="b-pt_chown">pt_chown</primary>
613 </indexterm>
614 </listitem>
615 </varlistentry>
616-->
617 <varlistentry id="rpcgen">
618 <term><command>rpcgen</command></term>
619 <listitem>
620 <para>Generates C code to implement the Remote Procedure Call (RPC)
621 protocol</para>
622 <indexterm zone="ch-system-glibc rpcgen">
623 <primary sortas="b-rpcgen">rpcgen</primary>
624 </indexterm>
625 </listitem>
626 </varlistentry>
627
628 <varlistentry id="sln">
629 <term><command>sln</command></term>
630 <listitem>
631 <para>A statically linked <command>ln</command> program</para>
632 <indexterm zone="ch-system-glibc sln">
633 <primary sortas="b-sln">sln</primary>
634 </indexterm>
635 </listitem>
636 </varlistentry>
637
638 <varlistentry id="sotruss">
639 <term><command>sotruss</command></term>
640 <listitem>
641 <para>Traces shared library procedure calls of a specified command</para>
642 <indexterm zone="ch-system-glibc sotruss">
643 <primary sortas="b-sotruss">sotruss</primary>
644 </indexterm>
645 </listitem>
646 </varlistentry>
647
648 <varlistentry id="sprof">
649 <term><command>sprof</command></term>
650 <listitem>
651 <para>Reads and displays shared object profiling data</para>
652 <indexterm zone="ch-system-glibc sprof">
653 <primary sortas="b-sprof">sprof</primary>
654 </indexterm>
655 </listitem>
656 </varlistentry>
657
658 <varlistentry id="tzselect">
659 <term><command>tzselect</command></term>
660 <listitem>
661 <para>Asks the user about the location of the system and reports
662 the corresponding time zone description</para>
663 <indexterm zone="ch-system-glibc tzselect">
664 <primary sortas="b-tzselect">tzselect</primary>
665 </indexterm>
666 </listitem>
667 </varlistentry>
668
669 <varlistentry id="xtrace">
670 <term><command>xtrace</command></term>
671 <listitem>
672 <para>Traces the execution of a program by printing the currently
673 executed function</para>
674 <indexterm zone="ch-system-glibc xtrace">
675 <primary sortas="b-xtrace">xtrace</primary>
676 </indexterm>
677 </listitem>
678 </varlistentry>
679
680 <varlistentry id="zdump">
681 <term><command>zdump</command></term>
682 <listitem>
683 <para>The time zone dumper</para>
684 <indexterm zone="ch-system-glibc zdump">
685 <primary sortas="b-zdump">zdump</primary>
686 </indexterm>
687 </listitem>
688 </varlistentry>
689
690 <varlistentry id="zic">
691 <term><command>zic</command></term>
692 <listitem>
693 <para>The time zone compiler</para>
694 <indexterm zone="ch-system-glibc zic">
695 <primary sortas="b-zic">zic</primary>
696 </indexterm>
697 </listitem>
698 </varlistentry>
699
700 <varlistentry id="ld.so">
701 <term><filename class="libraryfile">ld-&glibc-version;.so</filename></term>
702 <listitem>
703 <para>The helper program for shared library executables</para>
704 <indexterm zone="ch-system-glibc ld.so">
705 <primary sortas="c-ld.so">ld-&glibc-version;.so</primary>
706 </indexterm>
707 </listitem>
708 </varlistentry>
709
710 <varlistentry id="libBrokenLocale">
711 <term><filename class="libraryfile">libBrokenLocale</filename></term>
712 <listitem>
713 <para>Used internally by Glibc as a gross hack to get broken programs
714 (e.g., some Motif applications) running. See comments in
715 <filename>glibc-&glibc-version;/locale/broken_cur_max.c</filename>
716 for more information</para>
717 <indexterm zone="ch-system-glibc libBrokenLocale">
718 <primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
719 </indexterm>
720 </listitem>
721 </varlistentry>
722
723 <varlistentry id="libSegFault">
724 <term><filename class="libraryfile">libSegFault</filename></term>
725 <listitem>
726 <para>The segmentation fault signal handler, used by
727 <command>catchsegv</command></para>
728 <indexterm zone="ch-system-glibc libSegFault">
729 <primary sortas="c-libSegFault">libSegFault</primary>
730 </indexterm>
731 </listitem>
732 </varlistentry>
733
734 <varlistentry id="libanl">
735 <term><filename class="libraryfile">libanl</filename></term>
736 <listitem>
737 <para>An asynchronous name lookup library</para>
738 <indexterm zone="ch-system-glibc libanl">
739 <primary sortas="c-libanl">libanl</primary>
740 </indexterm>
741 </listitem>
742 </varlistentry>
743
744 <varlistentry id="libc">
745 <term><filename class="libraryfile">libc</filename></term>
746 <listitem>
747 <para>The main C library</para>
748 <indexterm zone="ch-system-glibc libc">
749 <primary sortas="c-libc">libc</primary>
750 </indexterm>
751 </listitem>
752 </varlistentry>
753
754 <varlistentry id="libcidn">
755 <term><filename class="libraryfile">libcidn</filename></term>
756 <listitem>
757 <para>Used internally by Glibc for handling internationalized domain
758 names in the <function>getaddrinfo()</function> function</para>
759 <indexterm zone="ch-system-glibc libcidn">
760 <primary sortas="c-libcidn">libcidn</primary>
761 </indexterm>
762 </listitem>
763 </varlistentry>
764
765 <varlistentry id="libcrypt">
766 <term><filename class="libraryfile">libcrypt</filename></term>
767 <listitem>
768 <para>The cryptography library</para>
769 <indexterm zone="ch-system-glibc libcrypt">
770 <primary sortas="c-libcrypt">libcrypt</primary>
771 </indexterm>
772 </listitem>
773 </varlistentry>
774
775 <varlistentry id="libdl">
776 <term><filename class="libraryfile">libdl</filename></term>
777 <listitem>
778 <para>The dynamic linking interface library</para>
779 <indexterm zone="ch-system-glibc libdl">
780 <primary sortas="c-libdl">libdl</primary>
781 </indexterm>
782 </listitem>
783 </varlistentry>
784
785 <varlistentry id="libg">
786 <term><filename class="libraryfile">libg</filename></term>
787 <listitem>
788 <para>Dummy library containing no functions. Previously was a runtime
789 library for <command>g++</command></para>
790 <indexterm zone="ch-system-glibc libg">
791 <primary sortas="c-libg">libg</primary>
792 </indexterm>
793 </listitem>
794 </varlistentry>
795
796 <varlistentry id="libieee">
797 <term><filename class="libraryfile">libieee</filename></term>
798 <listitem>
799 <para>Linking in this module forces error handling rules for math
800 functions as defined by the Institute of Electrical and Electronic
801 Engineers (IEEE). The default is POSIX.1 error handling</para>
802 <indexterm zone="ch-system-glibc libieee">
803 <primary sortas="c-libieee">libieee</primary>
804 </indexterm>
805 </listitem>
806 </varlistentry>
807
808 <varlistentry id="libm">
809 <term><filename class="libraryfile">libm</filename></term>
810 <listitem>
811 <para>The mathematical library</para>
812 <indexterm zone="ch-system-glibc libm">
813 <primary sortas="c-libm">libm</primary>
814 </indexterm>
815 </listitem>
816 </varlistentry>
817
818 <varlistentry id="libmcheck">
819 <term><filename class="libraryfile">libmcheck</filename></term>
820 <listitem>
821 <para>Turns on memory allocation checking when linked to</para>
822 <indexterm zone="ch-system-glibc libmcheck">
823 <primary sortas="c-libmcheck">libmcheck</primary>
824 </indexterm>
825 </listitem>
826 </varlistentry>
827
828 <varlistentry id="libmemusage">
829 <term><filename class="libraryfile">libmemusage</filename></term>
830 <listitem>
831 <para>Used by <command>memusage</command> to help collect
832 information about the memory usage of a program</para>
833 <indexterm zone="ch-system-glibc libmemusage">
834 <primary sortas="c-libmemusage">libmemusage</primary>
835 </indexterm>
836 </listitem>
837 </varlistentry>
838
839 <varlistentry id="libnsl">
840 <term><filename class="libraryfile">libnsl</filename></term>
841 <listitem>
842 <para>The network services library</para>
843 <indexterm zone="ch-system-glibc libnsl">
844 <primary sortas="c-libnsl">libnsl</primary>
845 </indexterm>
846 </listitem>
847 </varlistentry>
848
849 <varlistentry id="libnss">
850 <term><filename class="libraryfile">libnss</filename></term>
851 <listitem>
852 <para>The Name Service Switch libraries, containing functions for
853 resolving host names, user names, group names, aliases, services,
854 protocols, etc.</para>
855 <indexterm zone="ch-system-glibc libnss">
856 <primary sortas="c-libnss">libnss</primary>
857 </indexterm>
858 </listitem>
859 </varlistentry>
860
861 <varlistentry id="libpcprofile">
862 <term><filename class="libraryfile">libpcprofile</filename></term>
863 <listitem>
864 <para>Contains profiling functions used to track the amount of CPU
865 time spent in specific source code lines</para>
866 <indexterm zone="ch-system-glibc libpcprofile">
867 <primary sortas="c-libpcprofile">libpcprofile</primary>
868 </indexterm>
869 </listitem>
870 </varlistentry>
871
872 <varlistentry id="libpthread">
873 <term><filename class="libraryfile">libpthread</filename></term>
874 <listitem>
875 <para>The POSIX threads library</para>
876 <indexterm zone="ch-system-glibc libpthread">
877 <primary sortas="c-libpthread">libpthread</primary>
878 </indexterm>
879 </listitem>
880 </varlistentry>
881
882 <varlistentry id="libresolv">
883 <term><filename class="libraryfile">libresolv</filename></term>
884 <listitem>
885 <para>Contains functions for creating, sending, and interpreting
886 packets to the Internet domain name servers</para>
887 <indexterm zone="ch-system-glibc libresolv">
888 <primary sortas="c-libresolv">libresolv</primary>
889 </indexterm>
890 </listitem>
891 </varlistentry>
892
893 <varlistentry id="librpcsvc">
894 <term><filename class="libraryfile">librpcsvc</filename></term>
895 <listitem>
896 <para>Contains functions providing miscellaneous RPC services</para>
897 <indexterm zone="ch-system-glibc librpcsvc">
898 <primary sortas="c-librpcsvc">librpcsvc</primary>
899 </indexterm>
900 </listitem>
901 </varlistentry>
902
903 <varlistentry id="librt">
904 <term><filename class="libraryfile">librt</filename></term>
905 <listitem>
906 <para>Contains functions providing most of the interfaces specified
907 by the POSIX.1b Realtime Extension</para>
908 <indexterm zone="ch-system-glibc librt">
909 <primary sortas="c-librt">librt</primary>
910 </indexterm>
911 </listitem>
912 </varlistentry>
913
914 <varlistentry id="libthread_db">
915 <term><filename class="libraryfile">libthread_db</filename></term>
916 <listitem>
917 <para>Contains functions useful for building debuggers for
918 multi-threaded programs</para>
919 <indexterm zone="ch-system-glibc libthread_db">
920 <primary sortas="c-libthread_db">libthread_db</primary>
921 </indexterm>
922 </listitem>
923 </varlistentry>
924
925 <varlistentry id="libutil">
926 <term><filename class="libraryfile">libutil</filename></term>
927 <listitem>
928 <para>Contains code for <quote>standard</quote> functions used in
929 many different Unix utilities</para>
930 <indexterm zone="ch-system-glibc libutil">
931 <primary sortas="c-libutil">libutil</primary>
932 </indexterm>
933 </listitem>
934 </varlistentry>
935
936 </variablelist>
937
938 </sect2>
939
940</sect1>
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