source: chapter06/glibc.xml@ 427c00b

7.9-systemd
Last change on this file since 427c00b was 427c00b, checked in by Douglas R. Reno <renodr@…>, 8 years ago

Add patches for mpfr, binutils, glibc, bash

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/branches/systemd@11017 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 <para>Some of the Glibc programs use non-FHS compilant
57 <filename class="directory">/var/db</filename> directory to store
58 their runtime data. Apply the following patch to make such programs
59 store their runtime data in the FHS-compliant locations:</para>
60
61<screen><userinput remap="pre">patch -Np1 -i ../&glibc-fhs-patch;</userinput></screen>
62 <para>The Glibc build system is self-contained and will install
63 perfectly, even though the compiler specs file and linker are still
64 pointing at <filename class="directory">/tools</filename>. The specs
65 and linker cannot be adjusted before the Glibc install because the
66 Glibc autoconf tests would give false results and defeat the goal
67 of achieving a clean build.</para>
68
69 <para>Now, fix a build problem that affects i386 systems:</para>
70
71<screen><userinput remap="pre">patch -Np1 -i ../&glibc-upstream-patch;</userinput></screen>
72
73 <para>The most recent stable version of Glibc does not handle large files
74 correctly. Fix the problem with this patch:</para>
75
76<screen><userinput remap="pre">patch -Np1 -i ../&glibc-largefile-patch;</userinput></screen>
77
78 <para>Finally, update some recent changes from the upstream repository:</para>
79
80<screen><userinput remap="pre">patch -Np1 -i ../&glibc-upstream-patch2;</userinput></screen>
81
82 <para>The Glibc documentation recommends building Glibc
83 in a dedicated build directory:</para>
84
85<screen><userinput remap="pre">mkdir -v build
86cd build</userinput></screen>
87
88 <para>Prepare Glibc for compilation:</para>
89
90<screen><userinput remap="configure">../configure --prefix=/usr \
91 --disable-profile \
92 --enable-kernel=&min-kernel; \
93 --enable-obsolete-rpc</userinput></screen>
94
95 <para>Compile the package:</para>
96
97<screen><userinput remap="make">make</userinput></screen>
98
99 <important>
100 <para>In this section, the test suite for Glibc is considered critical.
101 Do not skip it under any circumstance.</para>
102 </important>
103
104 <para>Generally a few tests do not pass, but you can generally ignore
105 any of the test failures listed below. Now test the build results:</para>
106
107<screen><userinput remap="test">make check</userinput></screen>
108
109 <para>You will probably see some test failures. The Glibc test suite is
110 somewhat dependent on the host system. This is a list of the most common
111 issues seen for this version of LFS:</para>
112
113 <itemizedlist>
114
115 <listitem>
116 <para><emphasis>posix/tst-getaddrinfo4</emphasis> will always fail
117 due to not having the necessary network applications when the tests are
118 run.</para>
119 </listitem>
120
121 <listitem>
122 <para>The <emphasis>rt/tst-cputimer1</emphasis> and
123 <emphasis>rt/tst-cpuclock2</emphasis> tests have been known to
124 fail. The reason is not completely understood, but indications are
125 that minor timing issues can trigger these failures.</para>
126 </listitem>
127
128 <listitem>
129 <para>The math tests sometimes fail when running on
130 systems where the CPU is not a relatively new genuine Intel or
131 authentic AMD processor.</para>
132 </listitem>
133<!--
134 <listitem>
135 <para>When running on older and slower hardware or on systems under
136 load, some tests can fail because of test timeouts being exceeded.
137 Modifying the make check command to set a TIMEOUTFACTOR is reported to
138 help eliminate these errors (e.g. <command>TIMEOUTFACTOR=16
139 make -k check</command>).</para>
140 </listitem>
141-->
142<!--
143 <listitem>
144 <para>libio/tst-ftell-partial-wide.out fails because it needs a locale
145 that has not yet been generated.</para>
146 </listitem>
147-->
148 <listitem>
149 <para>The <emphasis>elf/tst-protected1b</emphasis> and
150 <emphasis>elf/tst-protected1b</emphasis> tests are known to
151 fail with the current stable version of binutils.</para>
152 </listitem>
153
154 <listitem>
155 <para>Other tests known to fail on some architectures are
156 malloc/tst-malloc-usable and nptl/tst-cleanupx4. </para>
157 </listitem>
158
159 </itemizedlist>
160
161 <para>Though it is a harmless message, the install stage of Glibc will
162 complain about the absence of <filename>/etc/ld.so.conf</filename>.
163 Prevent this warning with:</para>
164
165<screen><userinput remap="install">touch /etc/ld.so.conf</userinput></screen>
166
167 <para>Install the package:</para>
168
169<screen><userinput remap="install">make install</userinput></screen>
170
171 <para>Install the configuration file and runtime directory for
172 <command>nscd</command>:</para>
173
174<screen><userinput remap="install">cp -v ../nscd/nscd.conf /etc/nscd.conf
175mkdir -pv /var/cache/nscd</userinput></screen>
176
177 <para>Install the systemd support files for <command>nscd</command>:</para>
178
179<screen><userinput remap="install">install -v -Dm644 ../nscd/nscd.tmpfiles /usr/lib/tmpfiles.d/nscd.conf
180install -v -Dm644 ../nscd/nscd.service /lib/systemd/system/nscd.service</userinput></screen>
181
182 <para>The locales that can make the system respond in a different language
183 were not installed by the above command. None of the locales are required,
184 but if some of them are missing, test suites of the future packages would
185 skip important testcases.</para>
186
187 <para>Individual locales can be installed using the
188 <command>localedef</command> program. E.g., the first
189 <command>localedef</command> command below combines the
190 <filename>/usr/share/i18n/locales/cs_CZ</filename>
191 charset-independent locale definition with the
192 <filename>/usr/share/i18n/charmaps/UTF-8.gz</filename>
193 charmap definition and appends the result to the
194 <filename>/usr/lib/locale/locale-archive</filename> file.
195 The following instructions will install the minimum set of
196 locales necessary for the optimal coverage of tests:</para>
197
198<screen role="nodump"><userinput remap="locale-test">mkdir -pv /usr/lib/locale
199localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
200localedef -i de_DE -f ISO-8859-1 de_DE
201localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
202localedef -i de_DE -f UTF-8 de_DE.UTF-8
203localedef -i en_GB -f UTF-8 en_GB.UTF-8
204localedef -i en_HK -f ISO-8859-1 en_HK
205localedef -i en_PH -f ISO-8859-1 en_PH
206localedef -i en_US -f ISO-8859-1 en_US
207localedef -i en_US -f UTF-8 en_US.UTF-8
208localedef -i es_MX -f ISO-8859-1 es_MX
209localedef -i fa_IR -f UTF-8 fa_IR
210localedef -i fr_FR -f ISO-8859-1 fr_FR
211localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
212localedef -i fr_FR -f UTF-8 fr_FR.UTF-8
213localedef -i it_IT -f ISO-8859-1 it_IT
214localedef -i it_IT -f UTF-8 it_IT.UTF-8
215localedef -i ja_JP -f EUC-JP ja_JP
216localedef -i ru_RU -f KOI8-R ru_RU.KOI8-R
217localedef -i ru_RU -f UTF-8 ru_RU.UTF-8
218localedef -i tr_TR -f UTF-8 tr_TR.UTF-8
219localedef -i zh_CN -f GB18030 zh_CN.GB18030</userinput></screen>
220
221 <para>In addition, install the locale for your own country, language and
222 character set.</para>
223
224 <para>Alternatively, install all locales listed in the
225 <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
226 (it includes every locale listed above and many more) at once with the
227 following time-consuming command:</para>
228
229<screen><userinput remap="locale-full">make localedata/install-locales</userinput></screen>
230
231 <para>Then use the <command>localedef</command> command to create and
232 install locales not listed in the
233 <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
234 in the unlikely case you need them.</para>
235
236 </sect2>
237
238 <sect2 id="conf-glibc" role="configuration">
239 <title>Configuring Glibc</title>
240
241 <indexterm zone="conf-glibc">
242 <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
243 </indexterm>
244
245 <indexterm zone="conf-glibc">
246 <primary sortas="e-/etc/localtime">/etc/localtime</primary>
247 </indexterm>
248
249 <sect3>
250 <title>Adding nsswitch.conf</title>
251
252 <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
253 because the Glibc defaults do not work well in a networked environment.
254 </para>
255
256 <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running the
257 following:</para>
258
259<screen><userinput>cat &gt; /etc/nsswitch.conf &lt;&lt; "EOF"
260<literal># Begin /etc/nsswitch.conf
261
262passwd: files
263group: files
264shadow: files
265
266hosts: files dns myhostname
267networks: files
268
269protocols: files
270services: files
271ethers: files
272rpc: files
273
274# End /etc/nsswitch.conf</literal>
275EOF</userinput></screen>
276
277 </sect3>
278
279 <sect3>
280 <title>Adding time zone data</title>
281
282 <para>Install and set up the time zone data with the following:</para>
283<screen><userinput>tar -xf ../../tzdata&tzdata-version;.tar.gz
284
285ZONEINFO=/usr/share/zoneinfo
286mkdir -pv $ZONEINFO/{posix,right}
287
288for tz in etcetera southamerica northamerica europe africa antarctica \
289 asia australasia backward pacificnew systemv; do
290 zic -L /dev/null -d $ZONEINFO -y "sh yearistype.sh" ${tz}
291 zic -L /dev/null -d $ZONEINFO/posix -y "sh yearistype.sh" ${tz}
292 zic -L leapseconds -d $ZONEINFO/right -y "sh yearistype.sh" ${tz}
293done
294
295cp -v zone.tab zone1970.tab iso3166.tab $ZONEINFO
296zic -d $ZONEINFO -p America/New_York
297unset ZONEINFO</userinput></screen>
298
299 <variablelist>
300 <title>The meaning of the zic commands:</title>
301
302 <varlistentry>
303 <term><parameter>zic -L /dev/null ...</parameter></term>
304 <listitem>
305 <para>This creates posix time zones, without any leap seconds. It is
306 conventional to put these in both
307 <filename class="directory">zoneinfo</filename> and
308 <filename class="directory">zoneinfo/posix</filename>. It is
309 necessary to put the POSIX time zones in
310 <filename class="directory">zoneinfo</filename>, otherwise various
311 test-suites will report errors. On an embedded system, where space is
312 tight and you do not intend to ever update the time zones, you could save
313 1.9MB by not using the <filename class="directory">posix</filename>
314 directory, but some applications or test-suites might produce some
315 failures.</para>
316 </listitem>
317 </varlistentry>
318 <varlistentry>
319 <term><parameter>zic -L leapseconds ...</parameter></term>
320 <listitem>
321 <para>This creates right time zones, including leap seconds. On an
322 embedded system, where space is tight and you do not intend to
323 ever update the time zones, or care about the correct time, you could
324 save 1.9MB by omitting the <filename class="directory">right</filename>
325 directory.</para>
326 </listitem>
327 </varlistentry>
328 <varlistentry>
329 <term><parameter>zic ... -p ...</parameter></term>
330 <listitem>
331 <para>This creates the <filename>posixrules</filename> file. We use
332 New York because POSIX requires the daylight savings time rules
333 to be in accordance with US rules.</para>
334 </listitem>
335 </varlistentry>
336 </variablelist>
337
338
339 <para>One way to determine the local time zone is to run the following
340 script:</para>
341
342<screen role="nodump"><userinput>tzselect</userinput></screen>
343
344 <para>After answering a few questions about the location, the script will
345 output the name of the time zone (e.g.,
346 <emphasis>America/Edmonton</emphasis>). There are also some other possible
347 time zones listed in <filename
348 class='directory'>/usr/share/zoneinfo</filename> such as
349 <emphasis>Canada/Eastern</emphasis> or <emphasis>EST5EDT</emphasis> that
350 are not identified by the script but can be used.</para>
351
352 <para>Then create the <filename>/etc/localtime</filename> file by
353 running:</para>
354
355<screen><userinput>ln -sfv /usr/share/zoneinfo/<replaceable>&lt;xxx&gt;</replaceable> /etc/localtime</userinput></screen>
356
357 <para>Replace <replaceable>&lt;xxx&gt;</replaceable> with the name of the
358 time zone selected (e.g., Canada/Eastern).</para>
359
360 </sect3>
361
362 <sect3 id="conf-ld" role="configuration">
363 <title>Configuring the Dynamic Loader</title>
364
365 <indexterm zone="conf-ld">
366 <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
367 </indexterm>
368
369 <para>By default, the dynamic loader (<filename
370 class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
371 <filename class="directory">/lib</filename> and <filename
372 class="directory">/usr/lib</filename> for dynamic libraries that are
373 needed by programs as they are run. However, if there are libraries in
374 directories other than <filename class="directory">/lib</filename> and
375 <filename class="directory">/usr/lib</filename>, these need to be added
376 to the <filename>/etc/ld.so.conf</filename> file in order for the
377 dynamic loader to find them. Two directories that are commonly known
378 to contain additional libraries are <filename
379 class="directory">/usr/local/lib</filename> and <filename
380 class="directory">/opt/lib</filename>, so add those directories to the
381 dynamic loader's search path.</para>
382
383 <para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
384 following:</para>
385
386<screen><userinput>cat &gt; /etc/ld.so.conf &lt;&lt; "EOF"
387<literal># Begin /etc/ld.so.conf
388/usr/local/lib
389/opt/lib
390</literal>
391EOF</userinput></screen>
392
393 <para>If desired, the dynamic loader can also search a directory and
394 include the contents of files found there. Generally the files in
395 this include directory are one line specifying the desired library path.
396 To add this capability run the following commands:</para>
397
398<screen role="nodump"><userinput>cat &gt;&gt; /etc/ld.so.conf &lt;&lt; "EOF"
399<literal># Add an include directory
400include /etc/ld.so.conf.d/*.conf
401</literal>
402EOF
403mkdir -pv /etc/ld.so.conf.d</userinput></screen>
404
405 </sect3>
406 </sect2>
407
408 <sect2 id="contents-glibc" role="content">
409 <title>Contents of Glibc</title>
410
411 <segmentedlist>
412 <segtitle>Installed programs</segtitle>
413 <segtitle>Installed libraries</segtitle>
414 <segtitle>Installed directories</segtitle>
415
416 <seglistitem>
417 <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
418 ldd, lddlibc4, locale, localedef, makedb, mtrace, nscd, pcprofiledump,
419 pldd, rpcgen, sln, sotruss, sprof, tzselect, xtrace,
420 zdump, and zic</seg>
421 <seg>ld-&glibc-version;.so, libBrokenLocale.{a,so}, libSegFault.so, libanl.{a,so},
422 libc.{a,so}, libc_nonshared.a, libcidn.so,
423 libcrypt.{a,so}, libdl.{a,so}, libg.a, libieee.a, libm.{a,so},
424 libmcheck.a, libmemusage.so, libnsl.{a,so}, libnss_compat.so,
425 libnss_dns.so, libnss_files.so, libnss_hesiod.so, libnss_nis.so,
426 libnss_nisplus.so, libpcprofile.so, libpthread.{a,so},
427 libpthread_nonshared.a, libresolv.{a,so}, librpcsvc.a, librt.{a,so},
428 libthread_db.so, and libutil.{a,so}</seg>
429 <seg>/usr/include/arpa, /usr/include/bits, /usr/include/gnu,
430 /usr/include/net, /usr/include/netash, /usr/include/netatalk,
431 /usr/include/netax25, /usr/include/neteconet, /usr/include/netinet,
432 /usr/include/netipx, /usr/include/netiucv, /usr/include/netpacket,
433 /usr/include/netrom, /usr/include/netrose, /usr/include/nfs,
434 /usr/include/protocols, /usr/include/rpc, /usr/include/rpcsvc,
435 /usr/include/sys, /usr/lib/audit, /usr/lib/gconv, /usr/lib/locale,
436 /usr/libexec/getconf, /usr/share/i18n, /usr/share/zoneinfo,
437 /var/cache/nscd, and /var/lib/nss_db</seg>
438 </seglistitem>
439 </segmentedlist>
440
441 <variablelist>
442 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
443 <?dbfo list-presentation="list"?>
444 <?dbhtml list-presentation="table"?>
445
446 <varlistentry id="catchsegv">
447 <term><command>catchsegv</command></term>
448 <listitem>
449 <para>Can be used to create a stack trace when a program
450 terminates with a segmentation fault</para>
451 <indexterm zone="ch-system-glibc catchsegv">
452 <primary sortas="b-catchsegv">catchsegv</primary>
453 </indexterm>
454 </listitem>
455 </varlistentry>
456
457 <varlistentry id="gencat">
458 <term><command>gencat</command></term>
459 <listitem>
460 <para>Generates message catalogues</para>
461 <indexterm zone="ch-system-glibc gencat">
462 <primary sortas="b-gencat">gencat</primary>
463 </indexterm>
464 </listitem>
465 </varlistentry>
466
467 <varlistentry id="getconf">
468 <term><command>getconf</command></term>
469 <listitem>
470 <para>Displays the system configuration values for file system
471 specific variables</para>
472 <indexterm zone="ch-system-glibc getconf">
473 <primary sortas="b-getconf">getconf</primary>
474 </indexterm>
475 </listitem>
476 </varlistentry>
477
478 <varlistentry id="getent">
479 <term><command>getent</command></term>
480 <listitem>
481 <para>Gets entries from an administrative database</para>
482 <indexterm zone="ch-system-glibc getent">
483 <primary sortas="b-getent">getent</primary>
484 </indexterm>
485 </listitem>
486 </varlistentry>
487
488 <varlistentry id="iconv">
489 <term><command>iconv</command></term>
490 <listitem>
491 <para>Performs character set conversion</para>
492 <indexterm zone="ch-system-glibc iconv">
493 <primary sortas="b-iconv">iconv</primary>
494 </indexterm>
495 </listitem>
496 </varlistentry>
497
498 <varlistentry id="iconvconfig">
499 <term><command>iconvconfig</command></term>
500 <listitem>
501 <para>Creates fastloading <command>iconv</command> module configuration
502 files</para>
503 <indexterm zone="ch-system-glibc iconvconfig">
504 <primary sortas="b-iconvconfig">iconvconfig</primary>
505 </indexterm>
506 </listitem>
507 </varlistentry>
508
509 <varlistentry id="ldconfig">
510 <term><command>ldconfig</command></term>
511 <listitem>
512 <para>Configures the dynamic linker runtime bindings</para>
513 <indexterm zone="ch-system-glibc ldconfig">
514 <primary sortas="b-ldconfig">ldconfig</primary>
515 </indexterm>
516 </listitem>
517 </varlistentry>
518
519 <varlistentry id="ldd">
520 <term><command>ldd</command></term>
521 <listitem>
522 <para>Reports which shared libraries are required
523 by each given program or shared library</para>
524 <indexterm zone="ch-system-glibc ldd">
525 <primary sortas="b-ldd">ldd</primary>
526 </indexterm>
527 </listitem>
528 </varlistentry>
529
530 <varlistentry id="lddlibc4">
531 <term><command>lddlibc4</command></term>
532 <listitem>
533 <para>Assists <command>ldd</command> with object files</para>
534 <indexterm zone="ch-system-glibc lddlibc4">
535 <primary sortas="b-lddlibc4">lddlibc4</primary>
536 </indexterm>
537 </listitem>
538 </varlistentry>
539
540 <varlistentry id="locale">
541 <term><command>locale</command></term>
542 <listitem>
543 <para>Prints various information about the current locale</para>
544 <indexterm zone="ch-system-glibc locale">
545 <primary sortas="b-locale">locale</primary>
546 </indexterm>
547 </listitem>
548 </varlistentry>
549
550 <varlistentry id="localedef">
551 <term><command>localedef</command></term>
552 <listitem>
553 <para>Compiles locale specifications</para>
554 <indexterm zone="ch-system-glibc localedef">
555 <primary sortas="b-localedef">localedef</primary>
556 </indexterm>
557 </listitem>
558 </varlistentry>
559
560 <varlistentry id="makedb">
561 <term><command>makedb</command></term>
562 <listitem>
563 <para>Creates a simple database from textual input</para>
564 <indexterm zone="ch-system-glibc makedb">
565 <primary sortas="b-makedb">makedb</primary>
566 </indexterm>
567 </listitem>
568 </varlistentry>
569
570 <varlistentry id="mtrace">
571 <term><command>mtrace</command></term>
572 <listitem>
573 <para>Reads and interprets a memory trace file and displays a summary
574 in human-readable format</para>
575 <indexterm zone="ch-system-glibc mtrace">
576 <primary sortas="b-mtrace">mtrace</primary>
577 </indexterm>
578 </listitem>
579 </varlistentry>
580
581 <varlistentry id="nscd">
582 <term><command>nscd</command></term>
583 <listitem>
584 <para>A daemon that provides a cache for the most common name
585 service requests</para>
586 <indexterm zone="ch-system-glibc nscd">
587 <primary sortas="b-nscd">nscd</primary>
588 </indexterm>
589 </listitem>
590 </varlistentry>
591
592 <varlistentry id="pcprofiledump">
593 <term><command>pcprofiledump</command></term>
594 <listitem>
595 <para>Dumps information generated by PC profiling</para>
596 <indexterm zone="ch-system-glibc pcprofiledump">
597 <primary sortas="b-pcprofiledump">pcprofiledump</primary>
598 </indexterm>
599 </listitem>
600 </varlistentry>
601
602 <varlistentry id="pldd">
603 <term><command>pldd</command></term>
604 <listitem>
605 <para>Lists dynamic shared objects used by running processes</para>
606 <indexterm zone="ch-system-glibc pldd">
607 <primary sortas="b-pldd">pldd</primary>
608 </indexterm>
609 </listitem>
610 </varlistentry>
611<!--
612 <varlistentry id="pt_chown">
613 <term><command>pt_chown</command></term>
614 <listitem>
615 <para>A helper program for <command>grantpt</command> to set the owner,
616 group and access permissions of a slave pseudo terminal</para>
617 <indexterm zone="ch-system-glibc pt_chown">
618 <primary sortas="b-pt_chown">pt_chown</primary>
619 </indexterm>
620 </listitem>
621 </varlistentry>
622-->
623 <varlistentry id="rpcgen">
624 <term><command>rpcgen</command></term>
625 <listitem>
626 <para>Generates C code to implement the Remote Procedure Call (RPC)
627 protocol</para>
628 <indexterm zone="ch-system-glibc rpcgen">
629 <primary sortas="b-rpcgen">rpcgen</primary>
630 </indexterm>
631 </listitem>
632 </varlistentry>
633
634 <varlistentry id="sln">
635 <term><command>sln</command></term>
636 <listitem>
637 <para>A statically linked <command>ln</command> program</para>
638 <indexterm zone="ch-system-glibc sln">
639 <primary sortas="b-sln">sln</primary>
640 </indexterm>
641 </listitem>
642 </varlistentry>
643
644 <varlistentry id="sotruss">
645 <term><command>sotruss</command></term>
646 <listitem>
647 <para>Traces shared library procedure calls of a specified command</para>
648 <indexterm zone="ch-system-glibc sotruss">
649 <primary sortas="b-sotruss">sotruss</primary>
650 </indexterm>
651 </listitem>
652 </varlistentry>
653
654 <varlistentry id="sprof">
655 <term><command>sprof</command></term>
656 <listitem>
657 <para>Reads and displays shared object profiling data</para>
658 <indexterm zone="ch-system-glibc sprof">
659 <primary sortas="b-sprof">sprof</primary>
660 </indexterm>
661 </listitem>
662 </varlistentry>
663
664 <varlistentry id="tzselect">
665 <term><command>tzselect</command></term>
666 <listitem>
667 <para>Asks the user about the location of the system and reports
668 the corresponding time zone description</para>
669 <indexterm zone="ch-system-glibc tzselect">
670 <primary sortas="b-tzselect">tzselect</primary>
671 </indexterm>
672 </listitem>
673 </varlistentry>
674
675 <varlistentry id="xtrace">
676 <term><command>xtrace</command></term>
677 <listitem>
678 <para>Traces the execution of a program by printing the currently
679 executed function</para>
680 <indexterm zone="ch-system-glibc xtrace">
681 <primary sortas="b-xtrace">xtrace</primary>
682 </indexterm>
683 </listitem>
684 </varlistentry>
685
686 <varlistentry id="zdump">
687 <term><command>zdump</command></term>
688 <listitem>
689 <para>The time zone dumper</para>
690 <indexterm zone="ch-system-glibc zdump">
691 <primary sortas="b-zdump">zdump</primary>
692 </indexterm>
693 </listitem>
694 </varlistentry>
695
696 <varlistentry id="zic">
697 <term><command>zic</command></term>
698 <listitem>
699 <para>The time zone compiler</para>
700 <indexterm zone="ch-system-glibc zic">
701 <primary sortas="b-zic">zic</primary>
702 </indexterm>
703 </listitem>
704 </varlistentry>
705
706 <varlistentry id="ld.so">
707 <term><filename class="libraryfile">ld-&glibc-version;.so</filename></term>
708 <listitem>
709 <para>The helper program for shared library executables</para>
710 <indexterm zone="ch-system-glibc ld.so">
711 <primary sortas="c-ld.so">ld-&glibc-version;.so</primary>
712 </indexterm>
713 </listitem>
714 </varlistentry>
715
716 <varlistentry id="libBrokenLocale">
717 <term><filename class="libraryfile">libBrokenLocale</filename></term>
718 <listitem>
719 <para>Used internally by Glibc as a gross hack to get broken programs
720 (e.g., some Motif applications) running. See comments in
721 <filename>glibc-&glibc-version;/locale/broken_cur_max.c</filename>
722 for more information</para>
723 <indexterm zone="ch-system-glibc libBrokenLocale">
724 <primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
725 </indexterm>
726 </listitem>
727 </varlistentry>
728
729 <varlistentry id="libSegFault">
730 <term><filename class="libraryfile">libSegFault</filename></term>
731 <listitem>
732 <para>The segmentation fault signal handler, used by
733 <command>catchsegv</command></para>
734 <indexterm zone="ch-system-glibc libSegFault">
735 <primary sortas="c-libSegFault">libSegFault</primary>
736 </indexterm>
737 </listitem>
738 </varlistentry>
739
740 <varlistentry id="libanl">
741 <term><filename class="libraryfile">libanl</filename></term>
742 <listitem>
743 <para>An asynchronous name lookup library</para>
744 <indexterm zone="ch-system-glibc libanl">
745 <primary sortas="c-libanl">libanl</primary>
746 </indexterm>
747 </listitem>
748 </varlistentry>
749
750 <varlistentry id="libc">
751 <term><filename class="libraryfile">libc</filename></term>
752 <listitem>
753 <para>The main C library</para>
754 <indexterm zone="ch-system-glibc libc">
755 <primary sortas="c-libc">libc</primary>
756 </indexterm>
757 </listitem>
758 </varlistentry>
759
760 <varlistentry id="libcidn">
761 <term><filename class="libraryfile">libcidn</filename></term>
762 <listitem>
763 <para>Used internally by Glibc for handling internationalized domain
764 names in the <function>getaddrinfo()</function> function</para>
765 <indexterm zone="ch-system-glibc libcidn">
766 <primary sortas="c-libcidn">libcidn</primary>
767 </indexterm>
768 </listitem>
769 </varlistentry>
770
771 <varlistentry id="libcrypt">
772 <term><filename class="libraryfile">libcrypt</filename></term>
773 <listitem>
774 <para>The cryptography library</para>
775 <indexterm zone="ch-system-glibc libcrypt">
776 <primary sortas="c-libcrypt">libcrypt</primary>
777 </indexterm>
778 </listitem>
779 </varlistentry>
780
781 <varlistentry id="libdl">
782 <term><filename class="libraryfile">libdl</filename></term>
783 <listitem>
784 <para>The dynamic linking interface library</para>
785 <indexterm zone="ch-system-glibc libdl">
786 <primary sortas="c-libdl">libdl</primary>
787 </indexterm>
788 </listitem>
789 </varlistentry>
790
791 <varlistentry id="libg">
792 <term><filename class="libraryfile">libg</filename></term>
793 <listitem>
794 <para>Dummy library containing no functions. Previously was a runtime
795 library for <command>g++</command></para>
796 <indexterm zone="ch-system-glibc libg">
797 <primary sortas="c-libg">libg</primary>
798 </indexterm>
799 </listitem>
800 </varlistentry>
801
802 <varlistentry id="libieee">
803 <term><filename class="libraryfile">libieee</filename></term>
804 <listitem>
805 <para>Linking in this module forces error handling rules for math
806 functions as defined by the Institute of Electrical and Electronic
807 Engineers (IEEE). The default is POSIX.1 error handling</para>
808 <indexterm zone="ch-system-glibc libieee">
809 <primary sortas="c-libieee">libieee</primary>
810 </indexterm>
811 </listitem>
812 </varlistentry>
813
814 <varlistentry id="libm">
815 <term><filename class="libraryfile">libm</filename></term>
816 <listitem>
817 <para>The mathematical library</para>
818 <indexterm zone="ch-system-glibc libm">
819 <primary sortas="c-libm">libm</primary>
820 </indexterm>
821 </listitem>
822 </varlistentry>
823
824 <varlistentry id="libmcheck">
825 <term><filename class="libraryfile">libmcheck</filename></term>
826 <listitem>
827 <para>Turns on memory allocation checking when linked to</para>
828 <indexterm zone="ch-system-glibc libmcheck">
829 <primary sortas="c-libmcheck">libmcheck</primary>
830 </indexterm>
831 </listitem>
832 </varlistentry>
833
834 <varlistentry id="libmemusage">
835 <term><filename class="libraryfile">libmemusage</filename></term>
836 <listitem>
837 <para>Used by <command>memusage</command> to help collect
838 information about the memory usage of a program</para>
839 <indexterm zone="ch-system-glibc libmemusage">
840 <primary sortas="c-libmemusage">libmemusage</primary>
841 </indexterm>
842 </listitem>
843 </varlistentry>
844
845 <varlistentry id="libnsl">
846 <term><filename class="libraryfile">libnsl</filename></term>
847 <listitem>
848 <para>The network services library</para>
849 <indexterm zone="ch-system-glibc libnsl">
850 <primary sortas="c-libnsl">libnsl</primary>
851 </indexterm>
852 </listitem>
853 </varlistentry>
854
855 <varlistentry id="libnss">
856 <term><filename class="libraryfile">libnss</filename></term>
857 <listitem>
858 <para>The Name Service Switch libraries, containing functions for
859 resolving host names, user names, group names, aliases, services,
860 protocols, etc.</para>
861 <indexterm zone="ch-system-glibc libnss">
862 <primary sortas="c-libnss">libnss</primary>
863 </indexterm>
864 </listitem>
865 </varlistentry>
866
867 <varlistentry id="libpcprofile">
868 <term><filename class="libraryfile">libpcprofile</filename></term>
869 <listitem>
870 <para>Contains profiling functions used to track the amount of CPU
871 time spent in specific source code lines</para>
872 <indexterm zone="ch-system-glibc libpcprofile">
873 <primary sortas="c-libpcprofile">libpcprofile</primary>
874 </indexterm>
875 </listitem>
876 </varlistentry>
877
878 <varlistentry id="libpthread">
879 <term><filename class="libraryfile">libpthread</filename></term>
880 <listitem>
881 <para>The POSIX threads library</para>
882 <indexterm zone="ch-system-glibc libpthread">
883 <primary sortas="c-libpthread">libpthread</primary>
884 </indexterm>
885 </listitem>
886 </varlistentry>
887
888 <varlistentry id="libresolv">
889 <term><filename class="libraryfile">libresolv</filename></term>
890 <listitem>
891 <para>Contains functions for creating, sending, and interpreting
892 packets to the Internet domain name servers</para>
893 <indexterm zone="ch-system-glibc libresolv">
894 <primary sortas="c-libresolv">libresolv</primary>
895 </indexterm>
896 </listitem>
897 </varlistentry>
898
899 <varlistentry id="librpcsvc">
900 <term><filename class="libraryfile">librpcsvc</filename></term>
901 <listitem>
902 <para>Contains functions providing miscellaneous RPC services</para>
903 <indexterm zone="ch-system-glibc librpcsvc">
904 <primary sortas="c-librpcsvc">librpcsvc</primary>
905 </indexterm>
906 </listitem>
907 </varlistentry>
908
909 <varlistentry id="librt">
910 <term><filename class="libraryfile">librt</filename></term>
911 <listitem>
912 <para>Contains functions providing most of the interfaces specified
913 by the POSIX.1b Realtime Extension</para>
914 <indexterm zone="ch-system-glibc librt">
915 <primary sortas="c-librt">librt</primary>
916 </indexterm>
917 </listitem>
918 </varlistentry>
919
920 <varlistentry id="libthread_db">
921 <term><filename class="libraryfile">libthread_db</filename></term>
922 <listitem>
923 <para>Contains functions useful for building debuggers for
924 multi-threaded programs</para>
925 <indexterm zone="ch-system-glibc libthread_db">
926 <primary sortas="c-libthread_db">libthread_db</primary>
927 </indexterm>
928 </listitem>
929 </varlistentry>
930
931 <varlistentry id="libutil">
932 <term><filename class="libraryfile">libutil</filename></term>
933 <listitem>
934 <para>Contains code for <quote>standard</quote> functions used in
935 many different Unix utilities</para>
936 <indexterm zone="ch-system-glibc libutil">
937 <primary sortas="c-libutil">libutil</primary>
938 </indexterm>
939 </listitem>
940 </varlistentry>
941
942 </variablelist>
943
944 </sect2>
945
946</sect1>
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