source: chapter06/glibc.xml@ 33d8236

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 7.6 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 33d8236 was 33d8236, checked in by Bruce Dubbs <bdubbs@…>, 10 years ago

Simplify glibc testing

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10738 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
  • Property mode set to 100644
File size: 34.5 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>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>The Glibc documentation recommends building Glibc outside of the source
72 directory in a dedicated build directory:</para>
73
74<screen><userinput remap="pre">mkdir -v ../glibc-build
75cd ../glibc-build</userinput></screen>
76
77 <para>Prepare Glibc for compilation:</para>
78
79<screen><userinput remap="configure">../glibc-&glibc-version;/configure \
80 --prefix=/usr \
81 --disable-profile \
82 --enable-kernel=&min-kernel; \
83 --enable-obsolete-rpc</userinput></screen>
84
85 <variablelist>
86 <title>The meaning of the new configure options:</title>
87
88 <varlistentry>
89 <term><parameter>--enable-obsolete-rpc</parameter></term>
90 <listitem>
91 <para>Installs NIS and RPC related headers that are not installed by
92 default; these are required to rebuild Glibc and by several BLFS
93 packages.</para>
94 </listitem>
95 </varlistentry>
96
97 </variablelist>
98
99 <para>Compile the package:</para>
100
101<screen><userinput remap="make">make</userinput></screen>
102
103 <important>
104 <para>In this section, the test suite for Glibc is considered critical.
105 Do not skip it under any circumstance.</para>
106 </important>
107
108 <para>Generally a few tests do not pass, but you can generally ignore
109 any of the test failures listed below. Now test the build results:</para>
110
111<screen><userinput remap="test">make check</userinput></screen>
112
113 <para>You will probably see some test failures. The Glibc test suite is
114 somewhat dependent on the host system. This is a list of the most common
115 issues seen for this version of LFS:</para>
116
117 <itemizedlist>
118<!--
119 <listitem>
120 <para>The <emphasis>nptl/tst-clock2</emphasis>,
121 <emphasis>nptl/tst-attr3</emphasis>,
122 <emphasis>tst/tst-cputimer1</emphasis>, and
123 <emphasis>rt/tst-cpuclock2</emphasis>
124 tests have been known to fail. The
125 reason is not completely understood, but indications are that minor
126 timing issues can trigger these failures.</para>
127 </listitem>
128
129 <listitem>
130 <para>The math tests sometimes fail when running on
131 systems where the CPU is not a relatively new genuine Intel or
132 authentic AMD processor.</para>
133 </listitem>
134
135 <listitem>
136 <para>When running on older and slower hardware or on systems under
137 load, some tests can fail because of test timeouts being exceeded.
138 Modifying the make check command to set a TIMEOUTFACTOR is reported to
139 help eliminate these errors (e.g. <command>TIMEOUTFACTOR=16
140 make -k check</command>).</para>
141 </listitem>
142-->
143 <listitem>
144 <para>posix/tst-getaddrinfo4 will always fail due to not having a network
145 connection when the test is run.</para>
146 </listitem>
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 posix/bug-regex32,
155 misc/tst-writev, elf/check-textrel, nptl/tst-getpid2, nptl/tst-robust8,
156 and stdio-common/bug22.</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 ../glibc-&glibc-version;/nscd/nscd.conf /etc/nscd.conf
175mkdir -pv /var/cache/nscd</userinput></screen>
176
177 <para>The locales that can make the system respond in a different language
178 were not installed by the above command. None of the locales are required,
179 but if some of them are missing, test suites of the future packages would
180 skip important testcases.</para>
181
182 <para>Individual locales can be installed using the
183 <command>localedef</command> program. E.g., the first
184 <command>localedef</command> command below combines the
185 <filename>/usr/share/i18n/locales/cs_CZ</filename>
186 charset-independent locale definition with the
187 <filename>/usr/share/i18n/charmaps/UTF-8.gz</filename>
188 charmap definition and appends the result to the
189 <filename>/usr/lib/locale/locale-archive</filename> file.
190 The following instructions will install the minimum set of
191 locales necessary for the optimal coverage of tests:</para>
192
193<screen role="nodump"><userinput remap="locale-test">mkdir -pv /usr/lib/locale
194localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
195localedef -i de_DE -f ISO-8859-1 de_DE
196localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
197localedef -i de_DE -f UTF-8 de_DE.UTF-8
198localedef -i en_GB -f UTF-8 en_GB.UTF-8
199localedef -i en_HK -f ISO-8859-1 en_HK
200localedef -i en_PH -f ISO-8859-1 en_PH
201localedef -i en_US -f ISO-8859-1 en_US
202localedef -i en_US -f UTF-8 en_US.UTF-8
203localedef -i es_MX -f ISO-8859-1 es_MX
204localedef -i fa_IR -f UTF-8 fa_IR
205localedef -i fr_FR -f ISO-8859-1 fr_FR
206localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
207localedef -i fr_FR -f UTF-8 fr_FR.UTF-8
208localedef -i it_IT -f ISO-8859-1 it_IT
209localedef -i it_IT -f UTF-8 it_IT.UTF-8
210localedef -i ja_JP -f EUC-JP ja_JP
211localedef -i ru_RU -f KOI8-R ru_RU.KOI8-R
212localedef -i ru_RU -f UTF-8 ru_RU.UTF-8
213localedef -i tr_TR -f UTF-8 tr_TR.UTF-8
214localedef -i zh_CN -f GB18030 zh_CN.GB18030</userinput></screen>
215
216 <para>In addition, install the locale for your own country, language and
217 character set.</para>
218
219 <para>Alternatively, install all locales listed in the
220 <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
221 (it includes every locale listed above and many more) at once with the
222 following time-consuming command:</para>
223
224<screen><userinput remap="locale-full">make localedata/install-locales</userinput></screen>
225
226 <para>Then use the <command>localedef</command> command to create and
227 install locales not listed in the
228 <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
229 in the unlikely case you need them.</para>
230
231 </sect2>
232
233 <sect2 id="conf-glibc" role="configuration">
234 <title>Configuring Glibc</title>
235
236 <indexterm zone="conf-glibc">
237 <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
238 </indexterm>
239
240 <indexterm zone="conf-glibc">
241 <primary sortas="e-/etc/localtime">/etc/localtime</primary>
242 </indexterm>
243
244 <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
245 because, although Glibc provides defaults when this file is missing or corrupt,
246 the Glibc defaults do not work well in a networked environment. The time zone
247 also needs to be configured.</para>
248
249 <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running the
250 following:</para>
251
252<screen><userinput>cat &gt; /etc/nsswitch.conf &lt;&lt; "EOF"
253<literal># Begin /etc/nsswitch.conf
254
255passwd: files
256group: files
257shadow: files
258
259hosts: files dns
260networks: files
261
262protocols: files
263services: files
264ethers: files
265rpc: files
266
267# End /etc/nsswitch.conf</literal>
268EOF</userinput></screen>
269
270 <para>Install timezone data:</para>
271<screen><userinput>tar -xf ../tzdata&tzdata-version;.tar.gz
272
273ZONEINFO=/usr/share/zoneinfo
274mkdir -pv $ZONEINFO/{posix,right}
275
276for tz in etcetera southamerica northamerica europe africa antarctica \
277 asia australasia backward pacificnew systemv; do
278 zic -L /dev/null -d $ZONEINFO -y "sh yearistype.sh" ${tz}
279 zic -L /dev/null -d $ZONEINFO/posix -y "sh yearistype.sh" ${tz}
280 zic -L leapseconds -d $ZONEINFO/right -y "sh yearistype.sh" ${tz}
281done
282
283cp -v zone.tab zone1970.tab iso3166.tab $ZONEINFO
284zic -d $ZONEINFO -p America/New_York
285unset ZONEINFO</userinput></screen>
286
287 <variablelist>
288 <title>The meaning of the zic commands:</title>
289
290 <varlistentry>
291 <term><parameter>zic -L /dev/null ...</parameter></term>
292 <listitem>
293 <para>This creates posix timezones, without any leap seconds. It is
294 conventional to put these in both
295 <filename class="directory">zoneinfo</filename> and
296 <filename class="directory">zoneinfo/posix</filename>. It is
297 necessary to put the POSIX timezones in
298 <filename class="directory">zoneinfo</filename>, otherwise various
299 test-suites will report errors. On an embedded system, where space is
300 tight and you do not intend to ever update the timezones, you could save
301 1.9MB by not using the <filename class="directory">posix</filename>
302 directory, but some applications or test-suites might give less good
303 results</para>
304 </listitem>
305 </varlistentry>
306 <varlistentry>
307 <term><parameter>zic -L leapseconds ...</parameter></term>
308 <listitem>
309 <para>This creates right timezones, including leap seconds. On an
310 embedded system, where space is tight and you do not intend to
311 ever update the timezones, or care about the correct time, you could
312 save 1.9MB by omitting the <filename class="directory">right</filename>
313 directory.</para>
314 </listitem>
315 </varlistentry>
316 <varlistentry>
317 <term><parameter>zic ... -p ...</parameter></term>
318 <listitem>
319 <para>This creates the <filename>posixrules</filename> file. We use
320 New York because POSIX requires the daylight savings time rules
321 to be in accordance with US rules.</para>
322 </listitem>
323 </varlistentry>
324 </variablelist>
325
326
327 <para>One way to determine the local time zone is to run the following
328 script:</para>
329
330<screen role="nodump"><userinput>tzselect</userinput></screen>
331
332 <para>After answering a few questions about the location, the script will
333 output the name of the time zone (e.g.,
334 <emphasis>America/Edmonton</emphasis>). There are also some other possible
335 timezones listed in <filename
336 class='directory'>/usr/share/zoneinfo</filename> such as
337 <emphasis>Canada/Eastern</emphasis> or <emphasis>EST5EDT</emphasis> that
338 are not identified by the script but can be used.</para>
339
340 <para>Then create the <filename>/etc/localtime</filename> file by
341 running:</para>
342
343<screen><userinput>cp -v /usr/share/zoneinfo/<replaceable>&lt;xxx&gt;</replaceable> /etc/localtime</userinput></screen>
344
345 <para>Replace <replaceable>&lt;xxx&gt;</replaceable> with the name of the
346 time zone selected (e.g., Canada/Eastern).</para>
347
348 </sect2>
349
350 <sect2 id="conf-ld" role="configuration">
351 <title>Configuring the Dynamic Loader</title>
352
353 <indexterm zone="conf-ld">
354 <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
355 </indexterm>
356
357 <para>By default, the dynamic loader (<filename
358 class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
359 <filename class="directory">/lib</filename> and <filename
360 class="directory">/usr/lib</filename> for dynamic libraries that are
361 needed by programs as they are run. However, if there are libraries in
362 directories other than <filename class="directory">/lib</filename> and
363 <filename class="directory">/usr/lib</filename>, these need to be added
364 to the <filename>/etc/ld.so.conf</filename> file in order for the
365 dynamic loader to find them. Two directories that are commonly known
366 to contain additional libraries are <filename
367 class="directory">/usr/local/lib</filename> and <filename
368 class="directory">/opt/lib</filename>, so add those directories to the
369 dynamic loader's search path.</para>
370
371 <para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
372 following:</para>
373
374<screen><userinput>cat &gt; /etc/ld.so.conf &lt;&lt; "EOF"
375<literal># Begin /etc/ld.so.conf
376/usr/local/lib
377/opt/lib
378</literal>
379EOF</userinput></screen>
380
381 <para>If desired, the dynamic loader can also search a directory and
382 include the contents of files found there. Generally the files in
383 this include directory are one line specifying the desired library path.
384 To add this capability run the following commands:</para>
385
386<screen role="nodump"><userinput>cat &gt;&gt; /etc/ld.so.conf &lt;&lt; "EOF"
387<literal># Add an include directory
388include /etc/ld.so.conf.d/*.conf
389</literal>
390EOF
391mkdir -pv /etc/ld.so.conf.d</userinput></screen>
392
393 </sect2>
394
395 <sect2 id="contents-glibc" role="content">
396 <title>Contents of Glibc</title>
397
398 <segmentedlist>
399 <segtitle>Installed programs</segtitle>
400 <segtitle>Installed libraries</segtitle>
401 <segtitle>Installed directories</segtitle>
402
403 <seglistitem>
404 <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
405 ldd, lddlibc4, locale, localedef, makedb, mtrace, nscd, pcprofiledump,
406 pldd, rpcgen, sln, sotruss, sprof, tzselect, xtrace,
407 zdump, and zic</seg>
408 <seg>ld-&glibc-version;.so, libBrokenLocale.{a,so}, libSegFault.so, libanl.{a,so},
409 libc.{a,so}, libc_nonshared.a, libcidn.so,
410 libcrypt.{a,so}, libdl.{a,so}, libg.a, libieee.a, libm.{a,so},
411 libmcheck.a, libmemusage.so, libnsl.{a,so}, libnss_compat.so,
412 libnss_dns.so, libnss_files.so, libnss_hesiod.so, libnss_nis.so,
413 libnss_nisplus.so, libpcprofile.so, libpthread.{a,so},
414 libpthread_nonshared.a, libresolv.{a,so}, librpcsvc.a, librt.{a,so},
415 libthread_db.so, and libutil.{a,so}</seg>
416 <seg>/usr/include/arpa, /usr/include/bits, /usr/include/gnu,
417 /usr/include/net, /usr/include/netash, /usr/include/netatalk,
418 /usr/include/netax25, /usr/include/neteconet, /usr/include/netinet,
419 /usr/include/netipx, /usr/include/netiucv, /usr/include/netpacket,
420 /usr/include/netrom, /usr/include/netrose, /usr/include/nfs,
421 /usr/include/protocols, /usr/include/rpc, /usr/include/rpcsvc,
422 /usr/include/sys, /usr/lib/audit, /usr/lib/gconv, /usr/lib/locale,
423 /usr/libexec/getconf, /usr/share/i18n, /usr/share/zoneinfo,
424 /var/cache/nscd, and /var/lib/nss_db</seg>
425 </seglistitem>
426 </segmentedlist>
427
428 <variablelist>
429 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
430 <?dbfo list-presentation="list"?>
431 <?dbhtml list-presentation="table"?>
432
433 <varlistentry id="catchsegv">
434 <term><command>catchsegv</command></term>
435 <listitem>
436 <para>Can be used to create a stack trace when a program
437 terminates with a segmentation fault</para>
438 <indexterm zone="ch-system-glibc catchsegv">
439 <primary sortas="b-catchsegv">catchsegv</primary>
440 </indexterm>
441 </listitem>
442 </varlistentry>
443
444 <varlistentry id="gencat">
445 <term><command>gencat</command></term>
446 <listitem>
447 <para>Generates message catalogues</para>
448 <indexterm zone="ch-system-glibc gencat">
449 <primary sortas="b-gencat">gencat</primary>
450 </indexterm>
451 </listitem>
452 </varlistentry>
453
454 <varlistentry id="getconf">
455 <term><command>getconf</command></term>
456 <listitem>
457 <para>Displays the system configuration values for file system
458 specific variables</para>
459 <indexterm zone="ch-system-glibc getconf">
460 <primary sortas="b-getconf">getconf</primary>
461 </indexterm>
462 </listitem>
463 </varlistentry>
464
465 <varlistentry id="getent">
466 <term><command>getent</command></term>
467 <listitem>
468 <para>Gets entries from an administrative database</para>
469 <indexterm zone="ch-system-glibc getent">
470 <primary sortas="b-getent">getent</primary>
471 </indexterm>
472 </listitem>
473 </varlistentry>
474
475 <varlistentry id="iconv">
476 <term><command>iconv</command></term>
477 <listitem>
478 <para>Performs character set conversion</para>
479 <indexterm zone="ch-system-glibc iconv">
480 <primary sortas="b-iconv">iconv</primary>
481 </indexterm>
482 </listitem>
483 </varlistentry>
484
485 <varlistentry id="iconvconfig">
486 <term><command>iconvconfig</command></term>
487 <listitem>
488 <para>Creates fastloading <command>iconv</command> module configuration
489 files</para>
490 <indexterm zone="ch-system-glibc iconvconfig">
491 <primary sortas="b-iconvconfig">iconvconfig</primary>
492 </indexterm>
493 </listitem>
494 </varlistentry>
495
496 <varlistentry id="ldconfig">
497 <term><command>ldconfig</command></term>
498 <listitem>
499 <para>Configures the dynamic linker runtime bindings</para>
500 <indexterm zone="ch-system-glibc ldconfig">
501 <primary sortas="b-ldconfig">ldconfig</primary>
502 </indexterm>
503 </listitem>
504 </varlistentry>
505
506 <varlistentry id="ldd">
507 <term><command>ldd</command></term>
508 <listitem>
509 <para>Reports which shared libraries are required
510 by each given program or shared library</para>
511 <indexterm zone="ch-system-glibc ldd">
512 <primary sortas="b-ldd">ldd</primary>
513 </indexterm>
514 </listitem>
515 </varlistentry>
516
517 <varlistentry id="lddlibc4">
518 <term><command>lddlibc4</command></term>
519 <listitem>
520 <para>Assists <command>ldd</command> with object files</para>
521 <indexterm zone="ch-system-glibc lddlibc4">
522 <primary sortas="b-lddlibc4">lddlibc4</primary>
523 </indexterm>
524 </listitem>
525 </varlistentry>
526
527 <varlistentry id="locale">
528 <term><command>locale</command></term>
529 <listitem>
530 <para>Prints various information about the current locale</para>
531 <indexterm zone="ch-system-glibc locale">
532 <primary sortas="b-locale">locale</primary>
533 </indexterm>
534 </listitem>
535 </varlistentry>
536
537 <varlistentry id="localedef">
538 <term><command>localedef</command></term>
539 <listitem>
540 <para>Compiles locale specifications</para>
541 <indexterm zone="ch-system-glibc localedef">
542 <primary sortas="b-localedef">localedef</primary>
543 </indexterm>
544 </listitem>
545 </varlistentry>
546
547 <varlistentry id="makedb">
548 <term><command>makedb</command></term>
549 <listitem>
550 <para>Creates a simple database from textual input</para>
551 <indexterm zone="ch-system-glibc makedb">
552 <primary sortas="b-makedb">makedb</primary>
553 </indexterm>
554 </listitem>
555 </varlistentry>
556
557 <varlistentry id="mtrace">
558 <term><command>mtrace</command></term>
559 <listitem>
560 <para>Reads and interprets a memory trace file and displays a summary
561 in human-readable format</para>
562 <indexterm zone="ch-system-glibc mtrace">
563 <primary sortas="b-mtrace">mtrace</primary>
564 </indexterm>
565 </listitem>
566 </varlistentry>
567
568 <varlistentry id="nscd">
569 <term><command>nscd</command></term>
570 <listitem>
571 <para>A daemon that provides a cache for the most common name
572 service requests</para>
573 <indexterm zone="ch-system-glibc nscd">
574 <primary sortas="b-nscd">nscd</primary>
575 </indexterm>
576 </listitem>
577 </varlistentry>
578
579 <varlistentry id="pcprofiledump">
580 <term><command>pcprofiledump</command></term>
581 <listitem>
582 <para>Dumps information generated by PC profiling</para>
583 <indexterm zone="ch-system-glibc pcprofiledump">
584 <primary sortas="b-pcprofiledump">pcprofiledump</primary>
585 </indexterm>
586 </listitem>
587 </varlistentry>
588
589 <varlistentry id="pldd">
590 <term><command>pldd</command></term>
591 <listitem>
592 <para>Lists dynamic shared objects used by running processes</para>
593 <indexterm zone="ch-system-glibc pldd">
594 <primary sortas="b-pldd">pldd</primary>
595 </indexterm>
596 </listitem>
597 </varlistentry>
598<!--
599 <varlistentry id="pt_chown">
600 <term><command>pt_chown</command></term>
601 <listitem>
602 <para>A helper program for <command>grantpt</command> to set the owner,
603 group and access permissions of a slave pseudo terminal</para>
604 <indexterm zone="ch-system-glibc pt_chown">
605 <primary sortas="b-pt_chown">pt_chown</primary>
606 </indexterm>
607 </listitem>
608 </varlistentry>
609-->
610 <varlistentry id="rpcgen">
611 <term><command>rpcgen</command></term>
612 <listitem>
613 <para>Generates C code to implement the Remote Procedure Call (RPC)
614 protocol</para>
615 <indexterm zone="ch-system-glibc rpcgen">
616 <primary sortas="b-rpcgen">rpcgen</primary>
617 </indexterm>
618 </listitem>
619 </varlistentry>
620
621 <varlistentry id="sln">
622 <term><command>sln</command></term>
623 <listitem>
624 <para>A statically linked <command>ln</command> program</para>
625 <indexterm zone="ch-system-glibc sln">
626 <primary sortas="b-sln">sln</primary>
627 </indexterm>
628 </listitem>
629 </varlistentry>
630
631 <varlistentry id="sotruss">
632 <term><command>sotruss</command></term>
633 <listitem>
634 <para>Traces shared library procedure calls of a specified command</para>
635 <indexterm zone="ch-system-glibc sotruss">
636 <primary sortas="b-sotruss">sotruss</primary>
637 </indexterm>
638 </listitem>
639 </varlistentry>
640
641 <varlistentry id="sprof">
642 <term><command>sprof</command></term>
643 <listitem>
644 <para>Reads and displays shared object profiling data</para>
645 <indexterm zone="ch-system-glibc sprof">
646 <primary sortas="b-sprof">sprof</primary>
647 </indexterm>
648 </listitem>
649 </varlistentry>
650
651 <varlistentry id="tzselect">
652 <term><command>tzselect</command></term>
653 <listitem>
654 <para>Asks the user about the location of the system and reports
655 the corresponding time zone description</para>
656 <indexterm zone="ch-system-glibc tzselect">
657 <primary sortas="b-tzselect">tzselect</primary>
658 </indexterm>
659 </listitem>
660 </varlistentry>
661
662 <varlistentry id="xtrace">
663 <term><command>xtrace</command></term>
664 <listitem>
665 <para>Traces the execution of a program by printing the currently
666 executed function</para>
667 <indexterm zone="ch-system-glibc xtrace">
668 <primary sortas="b-xtrace">xtrace</primary>
669 </indexterm>
670 </listitem>
671 </varlistentry>
672
673 <varlistentry id="zdump">
674 <term><command>zdump</command></term>
675 <listitem>
676 <para>The time zone dumper</para>
677 <indexterm zone="ch-system-glibc zdump">
678 <primary sortas="b-zdump">zdump</primary>
679 </indexterm>
680 </listitem>
681 </varlistentry>
682
683 <varlistentry id="zic">
684 <term><command>zic</command></term>
685 <listitem>
686 <para>The time zone compiler</para>
687 <indexterm zone="ch-system-glibc zic">
688 <primary sortas="b-zic">zic</primary>
689 </indexterm>
690 </listitem>
691 </varlistentry>
692
693 <varlistentry id="ld.so">
694 <term><filename class="libraryfile">ld-&glibc-version;.so</filename></term>
695 <listitem>
696 <para>The helper program for shared library executables</para>
697 <indexterm zone="ch-system-glibc ld.so">
698 <primary sortas="c-ld.so">ld-&glibc-version;.so</primary>
699 </indexterm>
700 </listitem>
701 </varlistentry>
702
703 <varlistentry id="libBrokenLocale">
704 <term><filename class="libraryfile">libBrokenLocale</filename></term>
705 <listitem>
706 <para>Used internally by Glibc as a gross hack to get broken programs
707 (e.g., some Motif applications) running. See comments in
708 <filename>glibc-&glibc-version;/locale/broken_cur_max.c</filename>
709 for more information</para>
710 <indexterm zone="ch-system-glibc libBrokenLocale">
711 <primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
712 </indexterm>
713 </listitem>
714 </varlistentry>
715
716 <varlistentry id="libSegFault">
717 <term><filename class="libraryfile">libSegFault</filename></term>
718 <listitem>
719 <para>The segmentation fault signal handler, used by
720 <command>catchsegv</command></para>
721 <indexterm zone="ch-system-glibc libSegFault">
722 <primary sortas="c-libSegFault">libSegFault</primary>
723 </indexterm>
724 </listitem>
725 </varlistentry>
726
727 <varlistentry id="libanl">
728 <term><filename class="libraryfile">libanl</filename></term>
729 <listitem>
730 <para>An asynchronous name lookup library</para>
731 <indexterm zone="ch-system-glibc libanl">
732 <primary sortas="c-libanl">libanl</primary>
733 </indexterm>
734 </listitem>
735 </varlistentry>
736
737 <varlistentry id="libc">
738 <term><filename class="libraryfile">libc</filename></term>
739 <listitem>
740 <para>The main C library</para>
741 <indexterm zone="ch-system-glibc libc">
742 <primary sortas="c-libc">libc</primary>
743 </indexterm>
744 </listitem>
745 </varlistentry>
746
747 <varlistentry id="libcidn">
748 <term><filename class="libraryfile">libcidn</filename></term>
749 <listitem>
750 <para>Used internally by Glibc for handling internationalized domain
751 names in the <function>getaddrinfo()</function> function</para>
752 <indexterm zone="ch-system-glibc libcidn">
753 <primary sortas="c-libcidn">libcidn</primary>
754 </indexterm>
755 </listitem>
756 </varlistentry>
757
758 <varlistentry id="libcrypt">
759 <term><filename class="libraryfile">libcrypt</filename></term>
760 <listitem>
761 <para>The cryptography library</para>
762 <indexterm zone="ch-system-glibc libcrypt">
763 <primary sortas="c-libcrypt">libcrypt</primary>
764 </indexterm>
765 </listitem>
766 </varlistentry>
767
768 <varlistentry id="libdl">
769 <term><filename class="libraryfile">libdl</filename></term>
770 <listitem>
771 <para>The dynamic linking interface library</para>
772 <indexterm zone="ch-system-glibc libdl">
773 <primary sortas="c-libdl">libdl</primary>
774 </indexterm>
775 </listitem>
776 </varlistentry>
777
778 <varlistentry id="libg">
779 <term><filename class="libraryfile">libg</filename></term>
780 <listitem>
781 <para>Dummy library containing no functions. Previously was a runtime
782 library for <command>g++</command></para>
783 <indexterm zone="ch-system-glibc libg">
784 <primary sortas="c-libg">libg</primary>
785 </indexterm>
786 </listitem>
787 </varlistentry>
788
789 <varlistentry id="libieee">
790 <term><filename class="libraryfile">libieee</filename></term>
791 <listitem>
792 <para>Linking in this module forces error handling rules for math
793 functions as defined by the Institute of Electrical and Electronic
794 Engineers (IEEE). The default is POSIX.1 error handling</para>
795 <indexterm zone="ch-system-glibc libieee">
796 <primary sortas="c-libieee">libieee</primary>
797 </indexterm>
798 </listitem>
799 </varlistentry>
800
801 <varlistentry id="libm">
802 <term><filename class="libraryfile">libm</filename></term>
803 <listitem>
804 <para>The mathematical library</para>
805 <indexterm zone="ch-system-glibc libm">
806 <primary sortas="c-libm">libm</primary>
807 </indexterm>
808 </listitem>
809 </varlistentry>
810
811 <varlistentry id="libmcheck">
812 <term><filename class="libraryfile">libmcheck</filename></term>
813 <listitem>
814 <para>Turns on memory allocation checking when linked to</para>
815 <indexterm zone="ch-system-glibc libmcheck">
816 <primary sortas="c-libmcheck">libmcheck</primary>
817 </indexterm>
818 </listitem>
819 </varlistentry>
820
821 <varlistentry id="libmemusage">
822 <term><filename class="libraryfile">libmemusage</filename></term>
823 <listitem>
824 <para>Used by <command>memusage</command> to help collect
825 information about the memory usage of a program</para>
826 <indexterm zone="ch-system-glibc libmemusage">
827 <primary sortas="c-libmemusage">libmemusage</primary>
828 </indexterm>
829 </listitem>
830 </varlistentry>
831
832 <varlistentry id="libnsl">
833 <term><filename class="libraryfile">libnsl</filename></term>
834 <listitem>
835 <para>The network services library</para>
836 <indexterm zone="ch-system-glibc libnsl">
837 <primary sortas="c-libnsl">libnsl</primary>
838 </indexterm>
839 </listitem>
840 </varlistentry>
841
842 <varlistentry id="libnss">
843 <term><filename class="libraryfile">libnss</filename></term>
844 <listitem>
845 <para>The Name Service Switch libraries, containing functions for
846 resolving host names, user names, group names, aliases, services,
847 protocols, etc.</para>
848 <indexterm zone="ch-system-glibc libnss">
849 <primary sortas="c-libnss">libnss</primary>
850 </indexterm>
851 </listitem>
852 </varlistentry>
853
854 <varlistentry id="libpcprofile">
855 <term><filename class="libraryfile">libpcprofile</filename></term>
856 <listitem>
857 <para>Contains profiling functions used to track the amount of CPU
858 time spent in specific source code lines</para>
859 <indexterm zone="ch-system-glibc libpcprofile">
860 <primary sortas="c-libpcprofile">libpcprofile</primary>
861 </indexterm>
862 </listitem>
863 </varlistentry>
864
865 <varlistentry id="libpthread">
866 <term><filename class="libraryfile">libpthread</filename></term>
867 <listitem>
868 <para>The POSIX threads library</para>
869 <indexterm zone="ch-system-glibc libpthread">
870 <primary sortas="c-libpthread">libpthread</primary>
871 </indexterm>
872 </listitem>
873 </varlistentry>
874
875 <varlistentry id="libresolv">
876 <term><filename class="libraryfile">libresolv</filename></term>
877 <listitem>
878 <para>Contains functions for creating, sending, and interpreting
879 packets to the Internet domain name servers</para>
880 <indexterm zone="ch-system-glibc libresolv">
881 <primary sortas="c-libresolv">libresolv</primary>
882 </indexterm>
883 </listitem>
884 </varlistentry>
885
886 <varlistentry id="librpcsvc">
887 <term><filename class="libraryfile">librpcsvc</filename></term>
888 <listitem>
889 <para>Contains functions providing miscellaneous RPC services</para>
890 <indexterm zone="ch-system-glibc librpcsvc">
891 <primary sortas="c-librpcsvc">librpcsvc</primary>
892 </indexterm>
893 </listitem>
894 </varlistentry>
895
896 <varlistentry id="librt">
897 <term><filename class="libraryfile">librt</filename></term>
898 <listitem>
899 <para>Contains functions providing most of the interfaces specified
900 by the POSIX.1b Realtime Extension</para>
901 <indexterm zone="ch-system-glibc librt">
902 <primary sortas="c-librt">librt</primary>
903 </indexterm>
904 </listitem>
905 </varlistentry>
906
907 <varlistentry id="libthread_db">
908 <term><filename class="libraryfile">libthread_db</filename></term>
909 <listitem>
910 <para>Contains functions useful for building debuggers for
911 multi-threaded programs</para>
912 <indexterm zone="ch-system-glibc libthread_db">
913 <primary sortas="c-libthread_db">libthread_db</primary>
914 </indexterm>
915 </listitem>
916 </varlistentry>
917
918 <varlistentry id="libutil">
919 <term><filename class="libraryfile">libutil</filename></term>
920 <listitem>
921 <para>Contains code for <quote>standard</quote> functions used in
922 many different Unix utilities</para>
923 <indexterm zone="ch-system-glibc libutil">
924 <primary sortas="c-libutil">libutil</primary>
925 </indexterm>
926 </listitem>
927 </varlistentry>
928
929 </variablelist>
930
931 </sect2>
932
933</sect1>
Note: See TracBrowser for help on using the repository browser.