source: chapter06/glibc.xml@ bdde021

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 11.2 11.2-rc1 11.3 11.3-rc1 12.0 12.0-rc1 12.1 12.1-rc1 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 9.0 9.1 arm bdubbs/gcc13 ml-11.0 multilib renodr/libudev-from-systemd s6-init trunk xry111/arm64 xry111/arm64-12.0 xry111/clfs-ng xry111/lfs-next xry111/loongarch xry111/loongarch-12.0 xry111/loongarch-12.1 xry111/mips64el xry111/pip3 xry111/rust-wip-20221008 xry111/update-glibc
Last change on this file since bdde021 was bdde021, checked in by Bruce Dubbs <bdubbs@…>, 11 years ago

Update several pages to fix regression test failures.

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10316 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
  • Property mode set to 100644
File size: 35.4 KB
Line 
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>The Glibc build system is self-contained and will install
58 perfectly, even though the compiler specs file and linker are still
59 pointing at <filename class="directory">/tools</filename>. The specs
60 and linker cannot be adjusted before the Glibc install because the
61 Glibc autoconf tests would give false results and defeat the goal
62 of achieving a clean build.</para>
63
64 <para>The Glibc documentation recommends building Glibc outside of the source
65 directory in a dedicated build directory:</para>
66
67<screen><userinput remap="pre">mkdir -v ../glibc-build
68cd ../glibc-build</userinput></screen>
69
70 <para>Prepare Glibc for compilation:</para>
71
72<screen><userinput remap="configure">../glibc-&glibc-version;/configure \
73 --prefix=/usr \
74 --disable-profile \
75 --enable-kernel=2.6.34 \
76 --libexecdir=/usr/lib/glibc</userinput></screen>
77
78 <variablelist>
79 <title>The meaning of the new configure options:</title>
80
81 <varlistentry>
82 <term><parameter>--libexecdir=/usr/lib/glibc</parameter></term>
83 <listitem>
84 <para>This changes the location of the <command>pt_chown</command>
85 program from its default of <filename
86 class="directory">/usr/libexec</filename> to <filename
87 class="directory">/usr/lib/glibc</filename>.</para>
88 </listitem>
89 </varlistentry>
90
91 </variablelist>
92
93 <para>Compile the package:</para>
94
95<screen><userinput remap="make">make</userinput></screen>
96
97 <important>
98 <para>In this section, the test suite for Glibc is considered critical.
99 Do not skip it under any circumstance.</para>
100 </important>
101
102 <para>Generally a few tests do not pass, but you can generally ignore
103 any of the test failures listed below. Now test the build results:</para>
104
105<screen><userinput remap="test">make -k check 2&gt;&amp;1 | tee glibc-check-log
106grep Error glibc-check-log</userinput></screen>
107
108 <para>You will probably see an expected (ignored) failure in the
109 <emphasis>posix/annexc</emphasis> and
110 <emphasis>conform/run-conformtest</emphasis> tests. In addition the Glibc
111 test suite is somewhat dependent on the host system. This is a list of the
112 most common issues:</para>
113
114 <itemizedlist>
115
116 <listitem>
117 <para>The <emphasis>nptl/tst-clock2</emphasis>,
118 <emphasis>nptl/tst-attr3</emphasis>,
119 <emphasis>tst/tst-cputimer1</emphasis>, and
120 <emphasis>rt/tst-cpuclock2</emphasis>
121 tests have been known to fail. The
122 reason is not completely understood, but indications are that minor
123 timing issues can trigger these failures.</para>
124 </listitem>
125
126 <listitem>
127 <para>The math tests sometimes fail when running on
128 systems where the CPU is not a relatively new genuine Intel or
129 authentic AMD processor.</para>
130 </listitem>
131
132 <listitem>
133 <para>When running on older and slower hardware or on systems under
134 load, some tests can fail because of test timeouts being exceeded.
135 Modifying the make check command to set a TIMEOUTFACTOR is reported to
136 help eliminate these errors (e.g. <command>TIMEOUTFACTOR=16
137 make -k check</command>).</para>
138 </listitem>
139
140 <listitem>
141 <para>posix/tst-getaddrinfo4 will always fail due to not having a network
142 connection when the test is run.</para>
143 </listitem>
144
145 <listitem>
146 <para>Other tests known to fail on some architectures are posix/bug-regex32,
147 misc/tst-writev, elf/check-textrel, nptl/tst-getpid2, and stdio-common/bug22.</para>
148 </listitem>
149
150 </itemizedlist>
151
152 <para>Though it is a harmless message, the install stage of Glibc will
153 complain about the absence of <filename>/etc/ld.so.conf</filename>.
154 Prevent this warning with:</para>
155
156<screen><userinput remap="install">touch /etc/ld.so.conf</userinput></screen>
157
158 <para>Install the package:</para>
159
160<screen><userinput remap="install">make install</userinput></screen>
161
162 <para>Install NIS and RPC related headers that are not installed by
163 default; these are required to rebuild glibc and by several BLFS
164 packages:</para>
165
166<screen><userinput remap="install">cp -v ../glibc-&glibc-version;/sunrpc/rpc/*.h /usr/include/rpc
167cp -v ../glibc-&glibc-version;/sunrpc/rpcsvc/*.h /usr/include/rpcsvc
168cp -v ../glibc-&glibc-version;/nis/rpcsvc/*.h /usr/include/rpcsvc</userinput></screen>
169
170 <para>The locales that can make the system respond in a different language
171 were not installed by the above command. None of the locales are required,
172 but if some of them are missing, test suites of the future packages would
173 skip important testcases.</para>
174
175 <para>Individual locales can be installed using the
176 <command>localedef</command> program. E.g., the first
177 <command>localedef</command> command below combines the
178 <filename>/usr/share/i18n/locales/cs_CZ</filename>
179 charset-independent locale definition with the
180 <filename>/usr/share/i18n/charmaps/UTF-8.gz</filename>
181 charmap definition and appends the result to the
182 <filename>/usr/lib/locale/locale-archive</filename> file.
183 The following instructions will install the minimum set of
184 locales necessary for the optimal coverage of tests:</para>
185
186<screen role="nodump"><userinput remap="locale-test">mkdir -pv /usr/lib/locale
187localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
188localedef -i de_DE -f ISO-8859-1 de_DE
189localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
190localedef -i de_DE -f UTF-8 de_DE.UTF-8
191localedef -i en_GB -f UTF-8 en_GB.UTF-8
192localedef -i en_HK -f ISO-8859-1 en_HK
193localedef -i en_PH -f ISO-8859-1 en_PH
194localedef -i en_US -f ISO-8859-1 en_US
195localedef -i en_US -f UTF-8 en_US.UTF-8
196localedef -i es_MX -f ISO-8859-1 es_MX
197localedef -i fa_IR -f UTF-8 fa_IR
198localedef -i fr_FR -f ISO-8859-1 fr_FR
199localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
200localedef -i fr_FR -f UTF-8 fr_FR.UTF-8
201localedef -i it_IT -f ISO-8859-1 it_IT
202localedef -i it_IT -f UTF-8 it_IT.UTF-8
203localedef -i ja_JP -f EUC-JP ja_JP
204localedef -i ru_RU -f KOI8-R ru_RU.KOI8-R
205localedef -i ru_RU -f UTF-8 ru_RU.UTF-8
206localedef -i tr_TR -f UTF-8 tr_TR.UTF-8
207localedef -i zh_CN -f GB18030 zh_CN.GB18030</userinput></screen>
208
209 <para>In addition, install the locale for your own country, language and
210 character set.</para>
211
212 <para>Alternatively, install all locales listed in the
213 <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
214 (it includes every locale listed above and many more) at once with the
215 following time-consuming command:</para>
216
217<screen><userinput remap="locale-full">make localedata/install-locales</userinput></screen>
218
219 <para>Then use the <command>localedef</command> command to create and
220 install locales not listed in the
221 <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
222 in the unlikely case you need them.</para>
223
224 </sect2>
225
226 <sect2 id="conf-glibc" role="configuration">
227 <title>Configuring Glibc</title>
228
229 <indexterm zone="conf-glibc">
230 <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
231 </indexterm>
232
233 <indexterm zone="conf-glibc">
234 <primary sortas="e-/etc/localtime">/etc/localtime</primary>
235 </indexterm>
236
237 <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
238 because, although Glibc provides defaults when this file is missing or corrupt,
239 the Glibc defaults do not work well in a networked environment. The time zone
240 also needs to be configured.</para>
241
242 <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running the
243 following:</para>
244
245<screen><userinput>cat &gt; /etc/nsswitch.conf &lt;&lt; "EOF"
246<literal># Begin /etc/nsswitch.conf
247
248passwd: files
249group: files
250shadow: files
251
252hosts: files dns
253networks: files
254
255protocols: files
256services: files
257ethers: files
258rpc: files
259
260# End /etc/nsswitch.conf</literal>
261EOF</userinput></screen>
262
263 <para>Install timezone data:</para>
264<screen><userinput>tar -xf ../tzdata&tzdata-version;.tar.gz
265
266ZONEINFO=/usr/share/zoneinfo
267mkdir -pv $ZONEINFO/{posix,right}
268
269for tz in etcetera southamerica northamerica europe africa antarctica \
270 asia australasia backward pacificnew solar87 solar88 solar89 \
271 systemv; do
272 zic -L /dev/null -d $ZONEINFO -y "sh yearistype.sh" ${tz}
273 zic -L /dev/null -d $ZONEINFO/posix -y "sh yearistype.sh" ${tz}
274 zic -L leapseconds -d $ZONEINFO/right -y "sh yearistype.sh" ${tz}
275done
276
277cp -v zone.tab iso3166.tab $ZONEINFO
278zic -d $ZONEINFO -p America/New_York
279unset ZONEINFO</userinput></screen>
280
281 <variablelist>
282 <title>The meaning of the zic commands:</title>
283
284 <varlistentry>
285 <term><parameter>zic -L /dev/null ...</parameter></term>
286 <listitem>
287 <para>This creates posix timezones, without any leap seconds. It is
288 conventional to put these in both
289 <filename class="directory">zoneinfo</filename> and
290 <filename class="directory">zoneinfo/posix</filename>. It is
291 necessary to put the POSIX timezones in
292 <filename class="directory">zoneinfo</filename>, otherwise various
293 test-suites will report errors. On an embedded system, where space is
294 tight and you do not intend to ever update the timezones, you could save
295 1.9MB by not using the <filename class="directory">posix</filename>
296 directory, but some applications or test-suites might give less good
297 results</para>
298 </listitem>
299 </varlistentry>
300 <varlistentry>
301 <term><parameter>zic -L leapseconds ...</parameter></term>
302 <listitem>
303 <para>This creates right timezones, including leap seconds. On an
304 embedded system, where space is tight and you do not intend to
305 ever update the timezones, or care about the correct time, you could
306 save 1.9MB by omitting the <filename class="directory">right</filename>
307 directory.</para>
308 </listitem>
309 </varlistentry>
310 <varlistentry>
311 <term><parameter>zic ... -p ...</parameter></term>
312 <listitem>
313 <para>This creates the <filename>posixrules</filename> file. We use
314 New York because POSIX requires the daylight savings time rules
315 to be in accordance with US rules.</para>
316 </listitem>
317 </varlistentry>
318 </variablelist>
319
320
321 <para>One way to determine the local time zone is to run the following
322 script:</para>
323
324<screen role="nodump"><userinput>tzselect</userinput></screen>
325
326 <para>After answering a few questions about the location, the script will
327 output the name of the time zone (e.g.,
328 <emphasis>America/Edmonton</emphasis>). There are also some other possible
329 timezones listed in <filename
330 class='directory'>/usr/share/zoneinfo</filename> such as
331 <emphasis>Canada/Eastern</emphasis> or <emphasis>EST5EDT</emphasis> that
332 are not identified by the script but can be used.</para>
333
334 <para>Then create the <filename>/etc/localtime</filename> file by
335 running:</para>
336
337<screen><userinput>cp -v --remove-destination /usr/share/zoneinfo/<replaceable>&lt;xxx&gt;</replaceable> \
338 /etc/localtime</userinput></screen>
339
340 <para>Replace <replaceable>&lt;xxx&gt;</replaceable> with the name of the
341 time zone selected (e.g., Canada/Eastern).</para>
342
343 <variablelist>
344 <title>The meaning of the cp option:</title>
345
346 <varlistentry>
347 <term><parameter>--remove-destination</parameter></term>
348 <listitem>
349 <para>This is needed to force removal of the already existing symbolic
350 link. The reason for copying the file instead of using a symlink is to
351 cover the situation where <filename class="directory">/usr</filename>
352 is on a separate partition. This could be important when booted into
353 single user mode.</para>
354 </listitem>
355 </varlistentry>
356
357 </variablelist>
358
359 </sect2>
360
361 <sect2 id="conf-ld" role="configuration">
362 <title>Configuring the Dynamic Loader</title>
363
364 <indexterm zone="conf-ld">
365 <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
366 </indexterm>
367
368 <para>By default, the dynamic loader (<filename
369 class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
370 <filename class="directory">/lib</filename> and <filename
371 class="directory">/usr/lib</filename> for dynamic libraries that are
372 needed by programs as they are run. However, if there are libraries in
373 directories other than <filename class="directory">/lib</filename> and
374 <filename class="directory">/usr/lib</filename>, these need to be added
375 to the <filename>/etc/ld.so.conf</filename> file in order for the
376 dynamic loader to find them. Two directories that are commonly known
377 to contain additional libraries are <filename
378 class="directory">/usr/local/lib</filename> and <filename
379 class="directory">/opt/lib</filename>, so add those directories to the
380 dynamic loader's search path.</para>
381
382 <para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
383 following:</para>
384
385<screen><userinput>cat &gt; /etc/ld.so.conf &lt;&lt; "EOF"
386<literal># Begin /etc/ld.so.conf
387/usr/local/lib
388/opt/lib
389</literal>
390EOF</userinput></screen>
391
392 <para>If desired, the dynamic loader can also search a directory and
393 include the contents of files found there. Generally the files in
394 this include directory are one line specifying the desired library path.
395 To add this capability run the following commands:</para>
396
397<screen role="nodump"><userinput>cat &gt;&gt; /etc/ld.so.conf &lt;&lt; "EOF"
398<literal># Add an include directory
399include /etc/ld.so.conf.d/*.conf
400</literal>
401EOF
402mkdir -pv /etc/ld.so.conf.d</userinput></screen>
403
404 </sect2>
405
406 <sect2 id="contents-glibc" role="content">
407 <title>Contents of Glibc</title>
408
409 <segmentedlist>
410 <segtitle>Installed programs</segtitle>
411 <segtitle>Installed libraries</segtitle>
412 <segtitle>Installed directories</segtitle>
413
414 <seglistitem>
415 <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
416 ldd, lddlibc4, locale, localedef, makedb, mtrace, nscd, pcprofiledump,
417 pldd, pt_chown, rpcgen, sln, sotruss, sprof, tzselect, xtrace,
418 zdump, and zic</seg>
419 <seg>ld.so, libBrokenLocale.{a,so}, libSegFault.so, libanl.{a,so},
420 libbsd-compat.a, libc.{a,so}, libc_nonshared.a, libcidn.so,
421 libcrypt.{a,so}, libdl.{a,so}, libg.a, libieee.a, libm.{a,so},
422 libmcheck.a, libmemusage.so, libnsl.{a,so}, libnss_compat.so,
423 libnss_dns.so, libnss_files.so, libnss_hesiod.so, libnss_nis.so,
424 libnss_nisplus.so, libpcprofile.so, libpthread.{a,so},
425 libpthread_nonshared.a, libresolv.{a,so}, librpcsvc.a, librt.{a,so},
426 libthread_db.so, and libutil.{a,so}</seg>
427 <seg>/usr/include/arpa, /usr/include/bits, /usr/include/gnu,
428 /usr/include/net, /usr/include/netash, /usr/include/netatalk,
429 /usr/include/netax25, /usr/include/neteconet, /usr/include/netinet,
430 /usr/include/netipx, /usr/include/netiucv, /usr/include/netpacket,
431 /usr/include/netrom, /usr/include/netrose, /usr/include/nfs,
432 /usr/include/protocols, /usr/include/rpc, /usr/include/rpcsvc,
433 /usr/include/sys, /usr/lib/audit, /usr/lib/gconv, /usr/lib/glibc,
434 /usr/lib/locale, /usr/share/i18n, /usr/share/zoneinfo, /var/db</seg>
435 </seglistitem>
436 </segmentedlist>
437
438 <variablelist>
439 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
440 <?dbfo list-presentation="list"?>
441 <?dbhtml list-presentation="table"?>
442
443 <varlistentry id="catchsegv">
444 <term><command>catchsegv</command></term>
445 <listitem>
446 <para>Can be used to create a stack trace when a program
447 terminates with a segmentation fault</para>
448 <indexterm zone="ch-system-glibc catchsegv">
449 <primary sortas="b-catchsegv">catchsegv</primary>
450 </indexterm>
451 </listitem>
452 </varlistentry>
453
454 <varlistentry id="gencat">
455 <term><command>gencat</command></term>
456 <listitem>
457 <para>Generates message catalogues</para>
458 <indexterm zone="ch-system-glibc gencat">
459 <primary sortas="b-gencat">gencat</primary>
460 </indexterm>
461 </listitem>
462 </varlistentry>
463
464 <varlistentry id="getconf">
465 <term><command>getconf</command></term>
466 <listitem>
467 <para>Displays the system configuration values for file system
468 specific variables</para>
469 <indexterm zone="ch-system-glibc getconf">
470 <primary sortas="b-getconf">getconf</primary>
471 </indexterm>
472 </listitem>
473 </varlistentry>
474
475 <varlistentry id="getent">
476 <term><command>getent</command></term>
477 <listitem>
478 <para>Gets entries from an administrative database</para>
479 <indexterm zone="ch-system-glibc getent">
480 <primary sortas="b-getent">getent</primary>
481 </indexterm>
482 </listitem>
483 </varlistentry>
484
485 <varlistentry id="iconv">
486 <term><command>iconv</command></term>
487 <listitem>
488 <para>Performs character set conversion</para>
489 <indexterm zone="ch-system-glibc iconv">
490 <primary sortas="b-iconv">iconv</primary>
491 </indexterm>
492 </listitem>
493 </varlistentry>
494
495 <varlistentry id="iconvconfig">
496 <term><command>iconvconfig</command></term>
497 <listitem>
498 <para>Creates fastloading <command>iconv</command> module configuration
499 files</para>
500 <indexterm zone="ch-system-glibc iconvconfig">
501 <primary sortas="b-iconvconfig">iconvconfig</primary>
502 </indexterm>
503 </listitem>
504 </varlistentry>
505
506 <varlistentry id="ldconfig">
507 <term><command>ldconfig</command></term>
508 <listitem>
509 <para>Configures the dynamic linker runtime bindings</para>
510 <indexterm zone="ch-system-glibc ldconfig">
511 <primary sortas="b-ldconfig">ldconfig</primary>
512 </indexterm>
513 </listitem>
514 </varlistentry>
515
516 <varlistentry id="ldd">
517 <term><command>ldd</command></term>
518 <listitem>
519 <para>Reports which shared libraries are required
520 by each given program or shared library</para>
521 <indexterm zone="ch-system-glibc ldd">
522 <primary sortas="b-ldd">ldd</primary>
523 </indexterm>
524 </listitem>
525 </varlistentry>
526
527 <varlistentry id="lddlibc4">
528 <term><command>lddlibc4</command></term>
529 <listitem>
530 <para>Assists <command>ldd</command> with object files</para>
531 <indexterm zone="ch-system-glibc lddlibc4">
532 <primary sortas="b-lddlibc4">lddlibc4</primary>
533 </indexterm>
534 </listitem>
535 </varlistentry>
536
537 <varlistentry id="locale">
538 <term><command>locale</command></term>
539 <listitem>
540 <para>Prints various information about the current locale</para>
541 <indexterm zone="ch-system-glibc locale">
542 <primary sortas="b-locale">locale</primary>
543 </indexterm>
544 </listitem>
545 </varlistentry>
546
547 <varlistentry id="localedef">
548 <term><command>localedef</command></term>
549 <listitem>
550 <para>Compiles locale specifications</para>
551 <indexterm zone="ch-system-glibc localedef">
552 <primary sortas="b-localedef">localedef</primary>
553 </indexterm>
554 </listitem>
555 </varlistentry>
556
557 <varlistentry id="makedb">
558 <term><command>makedb</command></term>
559 <listitem>
560 <para>Creates a simple database from textual input</para>
561 <indexterm zone="ch-system-glibc makedb">
562 <primary sortas="b-makedb">makedb</primary>
563 </indexterm>
564 </listitem>
565 </varlistentry>
566
567 <varlistentry id="mtrace">
568 <term><command>mtrace</command></term>
569 <listitem>
570 <para>Reads and interprets a memory trace file and displays a summary
571 in human-readable format</para>
572 <indexterm zone="ch-system-glibc mtrace">
573 <primary sortas="b-mtrace">mtrace</primary>
574 </indexterm>
575 </listitem>
576 </varlistentry>
577
578 <varlistentry id="nscd">
579 <term><command>nscd</command></term>
580 <listitem>
581 <para>A daemon that provides a cache for the most common name
582 service requests</para>
583 <indexterm zone="ch-system-glibc nscd">
584 <primary sortas="b-nscd">nscd</primary>
585 </indexterm>
586 </listitem>
587 </varlistentry>
588
589 <varlistentry id="pcprofiledump">
590 <term><command>pcprofiledump</command></term>
591 <listitem>
592 <para>Dumps information generated by PC profiling</para>
593 <indexterm zone="ch-system-glibc pcprofiledump">
594 <primary sortas="b-pcprofiledump">pcprofiledump</primary>
595 </indexterm>
596 </listitem>
597 </varlistentry>
598
599 <varlistentry id="pldd">
600 <term><command>pldd</command></term>
601 <listitem>
602 <para>Lists dynamic shared objects used by running processes</para>
603 <indexterm zone="ch-system-glibc pldd">
604 <primary sortas="b-pldd">pldd</primary>
605 </indexterm>
606 </listitem>
607 </varlistentry>
608
609 <varlistentry id="pt_chown">
610 <term><command>pt_chown</command></term>
611 <listitem>
612 <para>A helper program for <command>grantpt</command> to set the owner,
613 group and access permissions of a slave pseudo terminal</para>
614 <indexterm zone="ch-system-glibc pt_chown">
615 <primary sortas="b-pt_chown">pt_chown</primary>
616 </indexterm>
617 </listitem>
618 </varlistentry>
619
620 <varlistentry id="rpcgen">
621 <term><command>rpcgen</command></term>
622 <listitem>
623 <para>Generates C code to implement the Remote Procedure Call (RPC)
624 protocol</para>
625 <indexterm zone="ch-system-glibc rpcgen">
626 <primary sortas="b-rpcgen">rpcgen</primary>
627 </indexterm>
628 </listitem>
629 </varlistentry>
630
631 <varlistentry id="sln">
632 <term><command>sln</command></term>
633 <listitem>
634 <para>A statically linked <command>ln</command> program</para>
635 <indexterm zone="ch-system-glibc sln">
636 <primary sortas="b-sln">sln</primary>
637 </indexterm>
638 </listitem>
639 </varlistentry>
640
641 <varlistentry id="sotruss">
642 <term><command>sotruss</command></term>
643 <listitem>
644 <para>Traces shared library procedure calls of a specified command</para>
645 <indexterm zone="ch-system-glibc sotruss">
646 <primary sortas="b-sotruss">sotruss</primary>
647 </indexterm>
648 </listitem>
649 </varlistentry>
650
651 <varlistentry id="sprof">
652 <term><command>sprof</command></term>
653 <listitem>
654 <para>Reads and displays shared object profiling data</para>
655 <indexterm zone="ch-system-glibc sprof">
656 <primary sortas="b-sprof">sprof</primary>
657 </indexterm>
658 </listitem>
659 </varlistentry>
660
661 <varlistentry id="tzselect">
662 <term><command>tzselect</command></term>
663 <listitem>
664 <para>Asks the user about the location of the system and reports
665 the corresponding time zone description</para>
666 <indexterm zone="ch-system-glibc tzselect">
667 <primary sortas="b-tzselect">tzselect</primary>
668 </indexterm>
669 </listitem>
670 </varlistentry>
671
672 <varlistentry id="xtrace">
673 <term><command>xtrace</command></term>
674 <listitem>
675 <para>Traces the execution of a program by printing the currently
676 executed function</para>
677 <indexterm zone="ch-system-glibc xtrace">
678 <primary sortas="b-xtrace">xtrace</primary>
679 </indexterm>
680 </listitem>
681 </varlistentry>
682
683 <varlistentry id="zdump">
684 <term><command>zdump</command></term>
685 <listitem>
686 <para>The time zone dumper</para>
687 <indexterm zone="ch-system-glibc zdump">
688 <primary sortas="b-zdump">zdump</primary>
689 </indexterm>
690 </listitem>
691 </varlistentry>
692
693 <varlistentry id="zic">
694 <term><command>zic</command></term>
695 <listitem>
696 <para>The time zone compiler</para>
697 <indexterm zone="ch-system-glibc zic">
698 <primary sortas="b-zic">zic</primary>
699 </indexterm>
700 </listitem>
701 </varlistentry>
702
703 <varlistentry id="ld.so">
704 <term><filename class="libraryfile">ld.so</filename></term>
705 <listitem>
706 <para>The helper program for shared library executables</para>
707 <indexterm zone="ch-system-glibc ld.so">
708 <primary sortas="c-ld.so">ld.so</primary>
709 </indexterm>
710 </listitem>
711 </varlistentry>
712
713 <varlistentry id="libBrokenLocale">
714 <term><filename class="libraryfile">libBrokenLocale</filename></term>
715 <listitem>
716 <para>Used internally by Glibc as a gross hack to get broken programs
717 (e.g., some Motif applications) running. See comments in
718 <filename>glibc-&glibc-version;/locale/broken_cur_max.c</filename>
719 for more information</para>
720 <indexterm zone="ch-system-glibc libBrokenLocale">
721 <primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
722 </indexterm>
723 </listitem>
724 </varlistentry>
725
726 <varlistentry id="libSegFault">
727 <term><filename class="libraryfile">libSegFault</filename></term>
728 <listitem>
729 <para>The segmentation fault signal handler, used by
730 <command>catchsegv</command></para>
731 <indexterm zone="ch-system-glibc libSegFault">
732 <primary sortas="c-libSegFault">libSegFault</primary>
733 </indexterm>
734 </listitem>
735 </varlistentry>
736
737 <varlistentry id="libanl">
738 <term><filename class="libraryfile">libanl</filename></term>
739 <listitem>
740 <para>An asynchronous name lookup library</para>
741 <indexterm zone="ch-system-glibc libanl">
742 <primary sortas="c-libanl">libanl</primary>
743 </indexterm>
744 </listitem>
745 </varlistentry>
746
747 <varlistentry id="libbsd-compat">
748 <term><filename class="libraryfile">libbsd-compat</filename></term>
749 <listitem>
750 <para>Provides the portability needed in order to run certain
751 Berkeley Software Distribution (BSD) programs under Linux</para>
752 <indexterm zone="ch-system-glibc libbsd-compat">
753 <primary sortas="c-libbsd-compat">libbsd-compat</primary>
754 </indexterm>
755 </listitem>
756 </varlistentry>
757
758 <varlistentry id="libc">
759 <term><filename class="libraryfile">libc</filename></term>
760 <listitem>
761 <para>The main C library</para>
762 <indexterm zone="ch-system-glibc libc">
763 <primary sortas="c-libc">libc</primary>
764 </indexterm>
765 </listitem>
766 </varlistentry>
767
768 <varlistentry id="libcidn">
769 <term><filename class="libraryfile">libcidn</filename></term>
770 <listitem>
771 <para>Used internally by Glibc for handling internationalized domain
772 names in the <function>getaddrinfo()</function> function</para>
773 <indexterm zone="ch-system-glibc libcidn">
774 <primary sortas="c-libcidn">libcidn</primary>
775 </indexterm>
776 </listitem>
777 </varlistentry>
778
779 <varlistentry id="libcrypt">
780 <term><filename class="libraryfile">libcrypt</filename></term>
781 <listitem>
782 <para>The cryptography library</para>
783 <indexterm zone="ch-system-glibc libcrypt">
784 <primary sortas="c-libcrypt">libcrypt</primary>
785 </indexterm>
786 </listitem>
787 </varlistentry>
788
789 <varlistentry id="libdl">
790 <term><filename class="libraryfile">libdl</filename></term>
791 <listitem>
792 <para>The dynamic linking interface library</para>
793 <indexterm zone="ch-system-glibc libdl">
794 <primary sortas="c-libdl">libdl</primary>
795 </indexterm>
796 </listitem>
797 </varlistentry>
798
799 <varlistentry id="libg">
800 <term><filename class="libraryfile">libg</filename></term>
801 <listitem>
802 <para>Dummy library containing no functions. Previously was a runtime
803 library for <command>g++</command></para>
804 <indexterm zone="ch-system-glibc libg">
805 <primary sortas="c-libg">libg</primary>
806 </indexterm>
807 </listitem>
808 </varlistentry>
809
810 <varlistentry id="libieee">
811 <term><filename class="libraryfile">libieee</filename></term>
812 <listitem>
813 <para>Linking in this module forces error handling rules for math
814 functions as defined by the Institute of Electrical and Electronic
815 Engineers (IEEE). The default is POSIX.1 error handling</para>
816 <indexterm zone="ch-system-glibc libieee">
817 <primary sortas="c-libieee">libieee</primary>
818 </indexterm>
819 </listitem>
820 </varlistentry>
821
822 <varlistentry id="libm">
823 <term><filename class="libraryfile">libm</filename></term>
824 <listitem>
825 <para>The mathematical library</para>
826 <indexterm zone="ch-system-glibc libm">
827 <primary sortas="c-libm">libm</primary>
828 </indexterm>
829 </listitem>
830 </varlistentry>
831
832 <varlistentry id="libmcheck">
833 <term><filename class="libraryfile">libmcheck</filename></term>
834 <listitem>
835 <para>Turns on memory allocation checking when linked to</para>
836 <indexterm zone="ch-system-glibc libmcheck">
837 <primary sortas="c-libmcheck">libmcheck</primary>
838 </indexterm>
839 </listitem>
840 </varlistentry>
841
842 <varlistentry id="libmemusage">
843 <term><filename class="libraryfile">libmemusage</filename></term>
844 <listitem>
845 <para>Used by <command>memusage</command> to help collect
846 information about the memory usage of a program</para>
847 <indexterm zone="ch-system-glibc libmemusage">
848 <primary sortas="c-libmemusage">libmemusage</primary>
849 </indexterm>
850 </listitem>
851 </varlistentry>
852
853 <varlistentry id="libnsl">
854 <term><filename class="libraryfile">libnsl</filename></term>
855 <listitem>
856 <para>The network services library</para>
857 <indexterm zone="ch-system-glibc libnsl">
858 <primary sortas="c-libnsl">libnsl</primary>
859 </indexterm>
860 </listitem>
861 </varlistentry>
862
863 <varlistentry id="libnss">
864 <term><filename class="libraryfile">libnss</filename></term>
865 <listitem>
866 <para>The Name Service Switch libraries, containing functions for
867 resolving host names, user names, group names, aliases, services,
868 protocols, etc.</para>
869 <indexterm zone="ch-system-glibc libnss">
870 <primary sortas="c-libnss">libnss</primary>
871 </indexterm>
872 </listitem>
873 </varlistentry>
874
875 <varlistentry id="libpcprofile">
876 <term><filename class="libraryfile">libpcprofile</filename></term>
877 <listitem>
878 <para>Contains profiling functions used to track the amount of CPU
879 time spent in specific source code lines</para>
880 <indexterm zone="ch-system-glibc libpcprofile">
881 <primary sortas="c-libpcprofile">libpcprofile</primary>
882 </indexterm>
883 </listitem>
884 </varlistentry>
885
886 <varlistentry id="libpthread">
887 <term><filename class="libraryfile">libpthread</filename></term>
888 <listitem>
889 <para>The POSIX threads library</para>
890 <indexterm zone="ch-system-glibc libpthread">
891 <primary sortas="c-libpthread">libpthread</primary>
892 </indexterm>
893 </listitem>
894 </varlistentry>
895
896 <varlistentry id="libresolv">
897 <term><filename class="libraryfile">libresolv</filename></term>
898 <listitem>
899 <para>Contains functions for creating, sending, and interpreting
900 packets to the Internet domain name servers</para>
901 <indexterm zone="ch-system-glibc libresolv">
902 <primary sortas="c-libresolv">libresolv</primary>
903 </indexterm>
904 </listitem>
905 </varlistentry>
906
907 <varlistentry id="librpcsvc">
908 <term><filename class="libraryfile">librpcsvc</filename></term>
909 <listitem>
910 <para>Contains functions providing miscellaneous RPC services</para>
911 <indexterm zone="ch-system-glibc librpcsvc">
912 <primary sortas="c-librpcsvc">librpcsvc</primary>
913 </indexterm>
914 </listitem>
915 </varlistentry>
916
917 <varlistentry id="librt">
918 <term><filename class="libraryfile">librt</filename></term>
919 <listitem>
920 <para>Contains functions providing most of the interfaces specified
921 by the POSIX.1b Realtime Extension</para>
922 <indexterm zone="ch-system-glibc librt">
923 <primary sortas="c-librt">librt</primary>
924 </indexterm>
925 </listitem>
926 </varlistentry>
927
928 <varlistentry id="libthread_db">
929 <term><filename class="libraryfile">libthread_db</filename></term>
930 <listitem>
931 <para>Contains functions useful for building debuggers for
932 multi-threaded programs</para>
933 <indexterm zone="ch-system-glibc libthread_db">
934 <primary sortas="c-libthread_db">libthread_db</primary>
935 </indexterm>
936 </listitem>
937 </varlistentry>
938
939 <varlistentry id="libutil">
940 <term><filename class="libraryfile">libutil</filename></term>
941 <listitem>
942 <para>Contains code for <quote>standard</quote> functions used in
943 many different Unix utilities</para>
944 <indexterm zone="ch-system-glibc libutil">
945 <primary sortas="c-libutil">libutil</primary>
946 </indexterm>
947 </listitem>
948 </varlistentry>
949
950 </variablelist>
951
952 </sect2>
953
954</sect1>
Note: See TracBrowser for help on using the repository browser.