source: BOOK/final-system/common/glibc.xml@ 5ec7db05

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since 5ec7db05 was e3a8717, checked in by Chris Staub <chris@…>, 16 years ago

Changed several BLFS references to CBLFS
  • Property mode set to 100644
File size: 29.7 KB
RevLine 
[3f8be484]1<?xml version="1.0" encoding="ISO-8859-1"?>
[aa18ac0]2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
[3f8be484]4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-glibc" role="wrap">
9 <?dbhtml filename="glibc.html"?>
10
11 <title>Glibc-&glibc-version;</title>
12
13 <indexterm zone="ch-system-glibc">
14 <primary sortas="a-Glibc">Glibc</primary>
15 </indexterm>
16
17 <sect2 role="package">
18 <title/>
19
20 <para>The Glibc package contains the main C library. This library provides
21 the basic routines for allocating memory, searching directories, opening and
22 closing files, reading and writing files, string handling, pattern matching,
23 arithmetic, and so on.</para>
24
25 </sect2>
26
27 <sect2 role="installation">
28 <title>Installation of Glibc</title>
29
30 <note os="z">
[a1fb12f]31 <para>Some packages outside of CLFS suggest installing GNU libiconv in
[3f8be484]32 order to translate data from one encoding to another. The project's
33 home page (<ulink url="http://www.gnu.org/software/libiconv/"/>) says
34 <quote>This library provides an <function>iconv()</function>
35 implementation, for use on systems which don't have one, or whose
36 implementation cannot convert from/to Unicode.</quote> Glibc provides
37 an <function>iconv()</function> implementation and can convert from/to
[a1fb12f]38 Unicode, therefore libiconv is not required on a CLFS system.</para>
[3f8be484]39 </note>
40
41 <para os="b">The Glibc build system is self-contained and will install
42 perfectly, even though the compiler specs file and linker are still
43 pointing at <filename class="directory">/tools</filename>. The specs
44 and linker cannot be adjusted before the Glibc install because the
[8253243]45 Glibc Autoconf tests would give false results and defeat the goal
[3f8be484]46 of achieving a clean build.</para>
47
[39139e4]48 <para os="c">The following patch fixes an issue that can
[c5f3cf70]49 cause <command>localedef</command> to segfault:</para>
[3f8be484]50
51<screen os="d"><userinput>patch -Np1 -i ../&glibc-localedef_segfault-patch;</userinput></screen>
[82f7fed]52
[3f8be484]53 <para os="e">The Glibc documentation recommends building Glibc outside of the
54 source directory in a dedicated build directory:</para>
55
[94e6142]56<screen os="f"><userinput>mkdir -v ../glibc-build
[3f8be484]57cd ../glibc-build</userinput></screen>
58
59 <para os="g">Prepare Glibc for compilation:</para>
60
61<screen os="h"><userinput>../glibc-&glibc-version;/configure --prefix=/usr \
62 --disable-profile --enable-add-ons --enable-kernel=2.6.0 \
63 --libexecdir=/usr/lib/glibc</userinput></screen>
64
65 <variablelist os="i">
66 <title>The meaning of the new configure option:</title>
67
68 <varlistentry>
69 <term><parameter>--libexecdir=/usr/lib/glibc</parameter></term>
70 <listitem>
71 <para>This changes the location of the <command>pt_chown</command>
72 program from its default of <filename
73 class="directory">/usr/libexec</filename> to <filename
74 class="directory">/usr/lib/glibc</filename>.</para>
75 </listitem>
76 </varlistentry>
77 </variablelist>
78
79 <para os="j">Compile the package:</para>
80
81<screen os="k"><userinput>make</userinput></screen>
82
83 <important os="l">
[121c48a]84 <para>The test suite for Glibc is considered critical.
[3f8be484]85 Do not skip it under any circumstance.</para>
86 </important>
87
88 <para os="m">Test the results:</para>
89
90<!-- items n,o,p no longer the master, use x86_64 which has no failures -->
91
92<screen os="n"><userinput>make -k check &gt;glibc-check-log 2&gt;&amp;1 ; grep Error glibc-check-log</userinput></screen>
93
94 <para os="o">The Glibc test suite is highly dependent on certain functions of
[10b2850]95 the host system, in particular the kernel. The posix/annexc test normally fails
96 and you should see <literal>Error 1 (ignored)</literal> in the output. Apart
97 from this, the Glibc test suite is always expected to pass. However, in certain
98 circumstances, some failures are unavoidable. If a test fails because of a missing
99 program (or missing symbolic link), or a segfault, you will see an error code
100 greater than 127 and the details will be in the log. More commonly, tests will
101 fail with <literal>Error 2</literal> - for these, the contents of the corresponding
102 <filename>.out</filename> file, e.g. <filename>posix/annexc.out</filename> may be
103 informative. Here is a list of the most common issues:</para>
[3f8be484]104
105 <itemizedlist os="p">
106 <listitem>
[3514708]107 <para>The <emphasis>math</emphasis> tests sometimes fail.
108 Certain optimization settings are known to be a
109 factor here.</para>
[3f8be484]110 </listitem>
111 <listitem>
[fb40919]112 <para>If you have mounted the CLFS partition with the
[3f8be484]113 <parameter>noatime</parameter> option, the <emphasis>atime</emphasis> test
114 will fail. As mentioned in <xref linkend="ch-partitioning-mounting"/>,
115 do not use the <parameter>noatime</parameter> option while building
[fb40919]116 CLFS.</para>
[3f8be484]117 </listitem>
118 <listitem>
119 <para>When running on older and slower hardware, some tests
120 can fail because of test timeouts being exceeded.</para>
121 </listitem>
122 </itemizedlist>
123
124 <para os="q">Though it is a harmless message, the install stage of Glibc will
125 complain about the absence of <filename>/etc/ld.so.conf</filename>.
126 Prevent this warning with:</para>
127
128<screen os="r"><userinput>touch /etc/ld.so.conf</userinput></screen>
129
130 <para os="s">Install the package:</para>
131
132<screen os="t"><userinput>make install</userinput></screen>
133
134 </sect2>
135
136 <sect2 id="i18n-glibc" role="configuration">
137 <title>Internationalization</title>
138
139 <para>The locales that can make the system respond in a different
[5a321cb]140 language were not installed by the above command. Install them
[3f8be484]141 with:</para>
142
143<screen><userinput>make localedata/install-locales</userinput></screen>
144
145 <para>To save time, an alternative to running the previous command (which
[643f8be]146 generates and installs every locale listed in the
147 glibc-&glibc-version;/localedata/SUPPORTED file) is to install only
[3f8be484]148 those locales that are wanted and needed. This can be achieved by using
149 the <command>localedef</command> command. Information on this command is
150 located in the <filename>INSTALL</filename> file in the Glibc source.
151 However, there are a number of locales that are essential in order for the
152 tests of future packages to pass, in particular, the
153 <emphasis>libstdc++</emphasis> tests from GCC. The following instructions,
154 instead of the <parameter>install-locales</parameter> target used above,
155 will install the minimum set of locales necessary for the tests to run
156 successfully:</para>
157
[3a3e135]158<screen role="nodump"><userinput>mkdir -pv /usr/lib/locale
[8a10f1c]159localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
[3f8be484]160localedef -i de_DE -f ISO-8859-1 de_DE
161localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
162localedef -i en_HK -f ISO-8859-1 en_HK
163localedef -i en_PH -f ISO-8859-1 en_PH
164localedef -i en_US -f ISO-8859-1 en_US
165localedef -i es_MX -f ISO-8859-1 es_MX
166localedef -i fa_IR -f UTF-8 fa_IR
167localedef -i fr_FR -f ISO-8859-1 fr_FR
168localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
169localedef -i it_IT -f ISO-8859-1 it_IT
170localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen>
171
172 <para>Some locales installed by the <command>make
173 localedata/install-locales</command> command above are not properly
[e3a8717]174 supported by some applications that are in CLFS and CBLFS. Because
[3f8be484]175 of the various problems that arise due to application programmers making
[fb40919]176 assumptions that break in such locales, CLFS should not be used in locales
[3f8be484]177 that utilize multibyte character sets (including UTF-8) or right-to-left
178 writing order. Numerous unofficial and unstable patches are required to
[fb40919]179 fix these problems, and it has been decided by the CLFS developers not to
[643f8be]180 support such complex locales at this time. This applies to the ja_JP and
181 fa_IR locales as well&mdash;they have been installed only for GCC and
182 Gettext tests to pass, and the <command>watch</command> program (part of
183 the Procps package) does not work properly in them. Various attempts to
184 circumvent these restrictions are documented in internationalization-related
185 hints.</para>
[3f8be484]186
187 </sect2>
188
189 <sect2 id="conf-glibc" role="configuration">
190 <title>Configuring Glibc</title>
191
192 <indexterm zone="conf-glibc">
193 <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
194 </indexterm>
195
196 <indexterm zone="conf-glibc">
197 <primary sortas="e-/etc/localtime">/etc/localtime</primary>
198 </indexterm>
199
200 <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
201 because, although Glibc provides defaults when this file is missing or
202 corrupt, the Glibc defaults do not work well in a networked environment.
203 The time zone also needs to be configured.</para>
204
205 <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running
206 the following:</para>
207
208<screen><userinput>cat &gt; /etc/nsswitch.conf &lt;&lt; "EOF"
209<literal># Begin /etc/nsswitch.conf
210
211passwd: files
212group: files
213shadow: files
214
215hosts: files dns
216networks: files
217
218protocols: files
219services: files
220ethers: files
221rpc: files
222
223# End /etc/nsswitch.conf</literal>
224EOF</userinput></screen>
225
226 <para>To determine the local time zone, run the following script:</para>
227
[0f3854e]228<screen role="nodump"><userinput>tzselect</userinput></screen>
[3f8be484]229
230 <para>After answering a few questions about the location, the script will
231 output the name of the time zone (e.g., <emphasis>EST5EDT</emphasis> or
232 <emphasis>Canada/Eastern</emphasis>). Then create the
233 <filename>/etc/localtime</filename> file by running:</para>
234
[94e6142]235<screen><userinput>cp -v --remove-destination /usr/share/zoneinfo/<replaceable>[xxx]</replaceable> \
[3f8be484]236 /etc/localtime</userinput></screen>
237
238 <para>Replace <replaceable>[xxx]</replaceable> with the name of the time zone
239 that <command>tzselect</command> provided (e.g., Canada/Eastern).</para>
240
241 <variablelist>
242 <title>The meaning of the cp option:</title>
243
244 <varlistentry>
245 <term><parameter>--remove-destination</parameter></term>
246 <listitem>
247 <para>This is needed to force removal of the already existing symbolic
248 link. The reason for copying the file instead of using a symlink is to
249 cover the situation where <filename class="directory">/usr</filename>
250 is on a separate partition. This could be important when booted into
251 single user mode.</para>
252 </listitem>
253 </varlistentry>
254 </variablelist>
255
256 </sect2>
257
258 <sect2 id="conf-ld" role="configuration">
[0b637f1]259 <title>Configuring The Dynamic Loader</title>
[3f8be484]260
261 <indexterm zone="conf-ld">
262 <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
263 </indexterm>
264
[3998188]265 <para os="ld-a">By default, the dynamic loader (<filename
[3f8be484]266 class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
267 <filename class="directory">/lib</filename> and <filename
268 class="directory">/usr/lib</filename> for dynamic libraries that are
269 needed by programs as they are run. However, if there are libraries in
270 directories other than <filename class="directory">/lib</filename> and
271 <filename class="directory">/usr/lib</filename>, these need to be
272 added to the <filename>/etc/ld.so.conf</filename> file in order
273 for the dynamic loader to find them. Two directories that are commonly
274 known to contain additional libraries are <filename
275 class="directory">/usr/local/lib</filename> and <filename
276 class="directory">/opt/lib</filename>, so add those directories to the
277 dynamic loader's search path.</para>
278
[3998188]279 <para os="ld-b">Create a new file <filename>/etc/ld.so.conf</filename> by running the
[3f8be484]280 following:</para>
281
[3998188]282<screen os="ld-c"><userinput>cat &gt; /etc/ld.so.conf &lt;&lt; "EOF"
[3f8be484]283<literal># Begin /etc/ld.so.conf
284
285/usr/local/lib
286/opt/lib
287
288# End /etc/ld.so.conf</literal>
289EOF</userinput></screen>
290
291 </sect2>
292
293 <sect2 id="contents-glibc" role="content">
294 <title>Contents of Glibc</title>
295
296 <segmentedlist>
297 <segtitle>Installed programs</segtitle>
298 <segtitle>Installed libraries</segtitle>
299
300 <seglistitem>
301 <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
[1e91bbd]302 ldd, lddlibc4, locale, localedef, mtrace, nscd,
[3f8be484]303 pcprofiledump, pt_chown, rpcgen, rpcinfo, sln, sprof, tzselect, xtrace,
304 zdump, and zic</seg>
305 <seg>ld.so, libBrokenLocale.[a,so], libSegFault.so, libanl.[a,so],
306 libbsd-compat.a, libc.[a,so], libcrypt.[a,so], libdl.[a,so], libg.a,
307 libieee.a, libm.[a,so], libmcheck.a, libmemusage.so, libnsl.a,
308 libnss_compat.so, libnss_dns.so, libnss_files.so, libnss_hesiod.so,
309 libnss_nis.so, libnss_nisplus.so, libpcprofile.so, libpthread.[a,so],
310 libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so, and
311 libutil.[a,so]</seg>
312 </seglistitem>
313 </segmentedlist>
314
315 <variablelist>
316 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
317 <?dbfo list-presentation="list"?>
318 <?dbhtml list-presentation="table"?>
319
320 <varlistentry id="catchsegv">
321 <term><command>catchsegv</command></term>
322 <listitem>
323 <para>Can be used to create a stack trace when a program
324 terminates with a segmentation fault</para>
325 <indexterm zone="ch-system-glibc catchsegv">
326 <primary sortas="b-catchsegv">catchsegv</primary>
327 </indexterm>
328 </listitem>
329 </varlistentry>
330
331 <varlistentry id="gencat">
332 <term><command>gencat</command></term>
333 <listitem>
334 <para>Generates message catalogues</para>
335 <indexterm zone="ch-system-glibc gencat">
336 <primary sortas="b-gencat">gencat</primary>
337 </indexterm>
338 </listitem>
339 </varlistentry>
340
341 <varlistentry id="getconf">
342 <term><command>getconf</command></term>
343 <listitem>
344 <para>Displays the system configuration values for file system specific
345 variables</para>
346 <indexterm zone="ch-system-glibc getconf">
347 <primary sortas="b-getconf">getconf</primary>
348 </indexterm>
349 </listitem>
350 </varlistentry>
351
352 <varlistentry id="getent">
353 <term><command>getent</command></term>
354 <listitem>
355 <para>Gets entries from an administrative database</para>
356 <indexterm zone="ch-system-glibc getent">
357 <primary sortas="b-getent">getent</primary>
358 </indexterm>
359 </listitem>
360 </varlistentry>
361
362 <varlistentry id="iconv">
363 <term><command>iconv</command></term>
364 <listitem>
365 <para>Performs character set conversion</para>
366 <indexterm zone="ch-system-glibc iconv">
367 <primary sortas="b-iconv">iconv</primary>
368 </indexterm>
369 </listitem>
370 </varlistentry>
371
372 <varlistentry id="iconvconfig">
373 <term><command>iconvconfig</command></term>
374 <listitem>
375 <para>Creates fastloading <command>iconv</command> module configuration
376 files</para>
377 <indexterm zone="ch-system-glibc iconvconfig">
378 <primary sortas="b-iconvconfig">iconvconfig</primary>
379 </indexterm>
380 </listitem>
381 </varlistentry>
382
383 <varlistentry id="ldconfig">
384 <term><command>ldconfig</command></term>
385 <listitem>
386 <para>Configures the dynamic linker runtime bindings</para>
387 <indexterm zone="ch-system-glibc ldconfig">
388 <primary sortas="b-ldconfig">ldconfig</primary>
389 </indexterm>
390 </listitem>
391 </varlistentry>
392
393 <varlistentry id="ldd">
394 <term><command>ldd</command></term>
395 <listitem>
396 <para>Reports which shared libraries are required
397 by each given program or shared library</para>
398 <indexterm zone="ch-system-glibc ldd">
399 <primary sortas="b-ldd">ldd</primary>
400 </indexterm>
401 </listitem>
402 </varlistentry>
403
404 <varlistentry id="lddlibc4">
405 <term><command>lddlibc4</command></term>
406 <listitem>
407 <para>Assists <command>ldd</command> with object files</para>
408 <indexterm zone="ch-system-glibc lddlibc4">
409 <primary sortas="b-lddlibc4">lddlibc4</primary>
410 </indexterm>
411 </listitem>
412 </varlistentry>
413
414 <varlistentry id="locale">
415 <term><command>locale</command></term>
416 <listitem>
417 <para>Tells the compiler to enable or disable the use of POSIX locales
418 for built-in operations</para>
419 <indexterm zone="ch-system-glibc locale">
420 <primary sortas="b-locale">locale</primary>
421 </indexterm>
422 </listitem>
423 </varlistentry>
424
425 <varlistentry id="localedef">
426 <term><command>localedef</command></term>
427 <listitem>
428 <para>Compiles locale specifications</para>
429 <indexterm zone="ch-system-glibc localedef">
430 <primary sortas="b-localedef">localedef</primary>
431 </indexterm>
432 </listitem>
433 </varlistentry>
434
435 <varlistentry id="mtrace">
436 <term><command>mtrace</command></term>
437 <listitem>
438 <para>Reads and interprets a memory trace file and
439 displays a summary in human-readable format</para>
440 <indexterm zone="ch-system-glibc mtrace">
441 <primary sortas="b-mtrace">mtrace</primary>
442 </indexterm>
443 </listitem>
444 </varlistentry>
445
446 <varlistentry id="nscd">
447 <term><command>nscd</command></term>
448 <listitem>
449 <para>A daemon that provides a cache for the most common name
450 service requests</para>
451 <indexterm zone="ch-system-glibc nscd">
452 <primary sortas="b-nscd">nscd</primary>
453 </indexterm>
454 </listitem>
455 </varlistentry>
456
457 <varlistentry id="pcprofiledump">
458 <term><command>pcprofiledump</command></term>
459 <listitem>
460 <para>Dumps information generated by PC profiling</para>
461 <indexterm zone="ch-system-glibc pcprofiledump">
462 <primary sortas="b-pcprofiledump">pcprofiledump</primary>
463 </indexterm>
464 </listitem>
465 </varlistentry>
466
467 <varlistentry id="pt_chown">
468 <term><command>pt_chown</command></term>
469 <listitem>
470 <para>A helper program for <command>grantpt</command> to set the owner,
471 group and access permissions of a slave pseudo terminal</para>
472 <indexterm zone="ch-system-glibc pt_chown">
473 <primary sortas="b-pt_chown">pt_chown</primary>
474 </indexterm>
475 </listitem>
476 </varlistentry>
477
478 <varlistentry id="rpcgen">
479 <term><command>rpcgen</command></term>
480 <listitem>
481 <para>Generates C code to implement the Remote Procecure Call (RPC)
482 protocol</para>
483 <indexterm zone="ch-system-glibc rpcgen">
484 <primary sortas="b-rpcgen">rpcgen</primary>
485 </indexterm>
486 </listitem>
487 </varlistentry>
488
489 <varlistentry id="rpcinfo">
490 <term><command>rpcinfo</command></term>
491 <listitem>
492 <para>Makes an RPC call to an RPC server</para>
493 <indexterm zone="ch-system-glibc rpcinfo">
494 <primary sortas="b-rpcinfo">rpcinfo</primary>
495 </indexterm>
496 </listitem>
497 </varlistentry>
498
499 <varlistentry id="sln">
500 <term><command>sln</command></term>
501 <listitem>
[7087cbc]502 <para>A statically linked program that creates symbolic links</para>
[3f8be484]503 <indexterm zone="ch-system-glibc sln">
504 <primary sortas="b-sln">sln</primary>
505 </indexterm>
506 </listitem>
507 </varlistentry>
508
509 <varlistentry id="sprof">
510 <term><command>sprof</command></term>
511 <listitem>
512 <para>Reads and displays shared object profiling data</para>
513 <indexterm zone="ch-system-glibc sprof">
514 <primary sortas="b-sprof">sprof</primary>
515 </indexterm>
516 </listitem>
517 </varlistentry>
518
519 <varlistentry id="tzselect">
520 <term><command>tzselect</command></term>
521 <listitem>
522 <para>Asks the user about the location of the
523 system and reports the corresponding time zone description</para>
524 <indexterm zone="ch-system-glibc tzselect">
525 <primary sortas="b-tzselect">tzselect</primary>
526 </indexterm>
527 </listitem>
528 </varlistentry>
529
530 <varlistentry id="xtrace">
531 <term><command>xtrace</command></term>
532 <listitem>
533 <para>Traces the execution of a program by
534 printing the currently executed function</para>
535 <indexterm zone="ch-system-glibc xtrace">
536 <primary sortas="b-xtrace">xtrace</primary>
537 </indexterm>
538 </listitem>
539 </varlistentry>
540
541 <varlistentry id="zdump">
542 <term><command>zdump</command></term>
543 <listitem>
544 <para>The time zone dumper</para>
545 <indexterm zone="ch-system-glibc zdump">
546 <primary sortas="b-zdump">zdump</primary>
547 </indexterm>
548 </listitem>
549 </varlistentry>
550
551 <varlistentry id="zic">
552 <term><command>zic</command></term>
553 <listitem>
554 <para>The time zone compiler</para>
555 <indexterm zone="ch-system-glibc zic">
556 <primary sortas="b-zic">zic</primary>
557 </indexterm>
558 </listitem>
559 </varlistentry>
560
561 <varlistentry id="ld.so">
562 <term><filename class="libraryfile">ld.so</filename></term>
563 <listitem>
564 <para>The helper program for shared library executables</para>
565 <indexterm zone="ch-system-glibc ld.so">
566 <primary sortas="c-ld.so">ld.so</primary>
567 </indexterm>
568 </listitem>
569 </varlistentry>
570
571 <varlistentry id="libBrokenLocale">
572 <term><filename class="libraryfile">libBrokenLocale</filename></term>
573 <listitem>
574 <para>Used by programs, such as Mozilla, to solve broken locales</para>
575 <indexterm zone="ch-system-glibc libBrokenLocale">
576 <primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
577 </indexterm>
578 </listitem>
579 </varlistentry>
580
581 <varlistentry id="libSegFault">
582 <term><filename class="libraryfile">libSegFault</filename></term>
583 <listitem>
584 <para>The segmentation fault signal handler</para>
585 <indexterm zone="ch-system-glibc libSegFault">
586 <primary sortas="c-libSegFault">libSegFault</primary>
587 </indexterm>
588 </listitem>
589 </varlistentry>
590
591 <varlistentry id="libanl">
592 <term><filename class="libraryfile">libanl</filename></term>
593 <listitem>
594 <para>An asynchronous name lookup library</para>
595 <indexterm zone="ch-system-glibc libanl">
596 <primary sortas="c-libanl">libanl</primary>
597 </indexterm>
598 </listitem>
599 </varlistentry>
600
601 <varlistentry id="libbsd-compat">
602 <term><filename class="libraryfile">libbsd-compat</filename></term>
603 <listitem>
604 <para>Provides the portability needed
605 in order to run certain Berkey Software Distribution (BSD) programs
606 under Linux</para>
607 <indexterm zone="ch-system-glibc libbsd-compat">
608 <primary sortas="c-libbsd-compat">libbsd-compat</primary>
609 </indexterm>
610 </listitem>
611 </varlistentry>
612
613 <varlistentry id="libc">
614 <term><filename class="libraryfile">libc</filename></term>
615 <listitem>
616 <para>The main C library</para>
617 <indexterm zone="ch-system-glibc libc">
618 <primary sortas="c-libc">libc</primary>
619 </indexterm>
620 </listitem>
621 </varlistentry>
622
623 <varlistentry id="libcrypt">
624 <term><filename class="libraryfile">libcrypt</filename></term>
625 <listitem>
626 <para>The cryptography library</para>
627 <indexterm zone="ch-system-glibc libcrypt">
628 <primary sortas="c-libcrypt">libcrypt</primary>
629 </indexterm>
630 </listitem>
631 </varlistentry>
632
633 <varlistentry id="libdl">
634 <term><filename class="libraryfile">libdl</filename></term>
635 <listitem>
636 <para>The dynamic linking interface library</para>
637 <indexterm zone="ch-system-glibc libdl">
638 <primary sortas="c-libdl">libdl</primary>
639 </indexterm>
640 </listitem>
641 </varlistentry>
642
643 <varlistentry id="libg">
644 <term><filename class="libraryfile">libg</filename></term>
645 <listitem>
646 <para>A runtime library for <command>g++</command></para>
647 <indexterm zone="ch-system-glibc libg">
648 <primary sortas="c-libg">libg</primary>
649 </indexterm>
650 </listitem>
651 </varlistentry>
652
653 <varlistentry id="libieee">
654 <term><filename class="libraryfile">libieee</filename></term>
655 <listitem>
656 <para>The Institute of Electrical and Electronic Engineers (IEEE)
657 floating point library</para>
658 <indexterm zone="ch-system-glibc libieee">
659 <primary sortas="c-libieee">libieee</primary>
660 </indexterm>
661 </listitem>
662 </varlistentry>
663
664 <varlistentry id="libm">
665 <term><filename class="libraryfile">libm</filename></term>
666 <listitem>
667 <para>The mathematical library</para>
668 <indexterm zone="ch-system-glibc libm">
669 <primary sortas="c-libm">libm</primary>
670 </indexterm>
671 </listitem>
672 </varlistentry>
673
674 <varlistentry id="libmcheck">
675 <term><filename class="libraryfile">libmcheck</filename></term>
676 <listitem>
677 <para>Contains code run at boot</para>
678 <indexterm zone="ch-system-glibc libmcheck">
679 <primary sortas="c-libmcheck">libmcheck</primary>
680 </indexterm>
681 </listitem>
682 </varlistentry>
683
684 <varlistentry id="libmemusage">
685 <term><filename class="libraryfile">libmemusage</filename></term>
686 <listitem>
[7087cbc]687 <para>Used by <command>memusage</command> (included in Glibc, but
688 not built in a base CLFS system as it has additional dependencies)
689 to help collect information about the memory usage of a program</para>
[3f8be484]690 <indexterm zone="ch-system-glibc libmemusage">
691 <primary sortas="c-libmemusage">libmemusage</primary>
692 </indexterm>
693 </listitem>
694 </varlistentry>
695
696 <varlistentry id="libnsl">
697 <term><filename class="libraryfile">libnsl</filename></term>
698 <listitem>
699 <para>The network services library</para>
700 <indexterm zone="ch-system-glibc libnsl">
701 <primary sortas="c-libnsl">libnsl</primary>
702 </indexterm>
703 </listitem>
704 </varlistentry>
705
706 <varlistentry id="libnss">
707 <term><filename class="libraryfile">libnss</filename></term>
708 <listitem>
709 <para>The Name Service Switch libraries, containing functions for
710 resolving host names, user names, group names, aliases, services,
711 protocols, etc.</para>
712 <indexterm zone="ch-system-glibc libnss">
713 <primary sortas="c-libnss">libnss</primary>
714 </indexterm>
715 </listitem>
716 </varlistentry>
717
718 <varlistentry id="libpcprofile">
719 <term><filename class="libraryfile">libpcprofile</filename></term>
720 <listitem>
721 <para>Contains profiling functions used to track the amount of CPU
722 time spent in specific source code lines</para>
723 <indexterm zone="ch-system-glibc libpcprofile">
724 <primary sortas="c-libpcprofile">libpcprofile</primary>
725 </indexterm>
726 </listitem>
727 </varlistentry>
728
729 <varlistentry id="libpthread">
730 <term><filename class="libraryfile">libpthread</filename></term>
731 <listitem>
732 <para>The POSIX threads library</para>
733 <indexterm zone="ch-system-glibc libpthread">
734 <primary sortas="c-libpthread">libpthread</primary>
735 </indexterm>
736 </listitem>
737 </varlistentry>
738
739 <varlistentry id="libresolv">
740 <term><filename class="libraryfile">libresolv</filename></term>
741 <listitem>
742 <para>Contains functions for creating, sending, and interpreting
743 packets to the Internet domain name servers</para>
744 <indexterm zone="ch-system-glibc libresolv">
745 <primary sortas="c-libresolv">libresolv</primary>
746 </indexterm>
747 </listitem>
748 </varlistentry>
749
750 <varlistentry id="librpcsvc">
751 <term><filename class="libraryfile">librpcsvc</filename></term>
752 <listitem>
753 <para>Contains functions providing miscellaneous RPC services</para>
754 <indexterm zone="ch-system-glibc librpcsvc">
755 <primary sortas="c-librpcsvc">librpcsvc</primary>
756 </indexterm>
757 </listitem>
758 </varlistentry>
759
760 <varlistentry id="librt">
761 <term><filename class="libraryfile">librt</filename></term>
762 <listitem>
763 <para>Contains functions providing most of the interfaces specified by
764 the POSIX.1b Realtime Extension</para>
765 <indexterm zone="ch-system-glibc librt">
766 <primary sortas="c-librt">librt</primary>
767 </indexterm>
768 </listitem>
769 </varlistentry>
770
771 <varlistentry id="libthread_db">
772 <term><filename class="libraryfile">libthread_db</filename></term>
773 <listitem>
774 <para>Contains functions useful for
775 building debuggers for multi-threaded programs</para>
776 <indexterm zone="ch-system-glibc libthread_db">
777 <primary sortas="c-libthread_db">libthread_db</primary>
778 </indexterm>
779 </listitem>
780 </varlistentry>
781
782 <varlistentry id="libutil">
783 <term><filename class="libraryfile">libutil</filename></term>
784 <listitem>
785 <para>Contains code for <quote>standard</quote> functions used in
786 many different Unix utilities</para>
787 <indexterm zone="ch-system-glibc libutil">
788 <primary sortas="c-libutil">libutil</primary>
789 </indexterm>
790 </listitem>
791 </varlistentry>
792
793 </variablelist>
794
795 </sect2>
796
797</sect1>
Note: See TracBrowser for help on using the repository browser.