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source: clfs-sysroot/BOOK/cross-tools/common/eglibc.xml@ 6a5e6b3

Last change on this file since 6a5e6b3 was 902a553, checked in by Joe Ciccone <jciccone@…>, 15 years ago
Replace the locales standalone installation command block with a simpler command.
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1	<?xml version="1.0" encoding="ISO-8859-1"?>
2	<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3	"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4	<!ENTITY % general-entities SYSTEM "../../general.ent">
5	%general-entities;
6	]>
7
8	<sect1 id="ch-cross-tools-eglibc" role="wrap">
9	<?dbhtml filename="eglibc.html"?>
10
11	<title>EGLIBC-&eglibc-version;</title>
12
13	<indexterm zone="ch-cross-tools-eglibc">
14	<primary sortas="a-EGLIBC">EGLIBC</primary>
15	<secondary>cross tools</secondary>
16	</indexterm>
17
18	<sect2 role="package">
19	<title/>
20
21	<para>The EGLIBC package contains the main C library. This library provides
22	the basic routines for allocating memory, searching directories, opening and
23	closing files, reading and writing files, string handling, pattern matching,
24	arithmetic, and so on.</para>
25
26	</sect2>
27
28	<sect2 role="installation">
29	<title>Installation of EGLIBC</title>
30
31	<note os="a">
32	<para>Some packages outside of CLFS suggest installing GNU libiconv in
33	order to translate data from one encoding to another. The project's
34	home page (<ulink url="http://www.gnu.org/software/libiconv/"/>) says
35	<quote>This library provides an <function>iconv()</function>
36	implementation, for use on systems which don't have one, or whose
37	implementation cannot convert from/to Unicode.</quote> EGLIBC provides
38	an <function>iconv()</function> implementation and can convert from/to
39	Unicode, therefore libiconv is not required on an CLFS system.</para>
40	</note>
41
42	<para os="p1">EGLIBC has various issues addressed by the following patch:</para>
43
44	<screen os="p2"><userinput>patch -Np1 -i ../&eglibc-fixes-patch;</userinput></screen>
45
46	<para os="s1">Disable linking to <filename>libgcc_eh</filename>:</para>
47
48	<screen os="s2"><userinput>cp -v Makeconfig{,.orig}
49	sed -e 's/-lgcc_eh//g' Makeconfig.orig > Makeconfig</userinput></screen>
50
51	<para os="b">The EGLIBC documentation recommends building EGLIBC outside of the
52	source directory in a dedicated build directory:</para>
53
54	<screen os="c"><userinput>mkdir -v ../eglibc-build
55	cd ../eglibc-build</userinput></screen>
56
57	<para os="d">The following lines need to be added to
58	<filename>config.cache</filename> for EGLIBC to support NPTL:</para>
59
60	<screen os="e"><userinput>cat > config.cache << EOF
61	libc_cv_forced_unwind=yes
62	libc_cv_c_cleanup=yes
63	libc_cv_gnu89_inline=yes
64	EOF</userinput></screen>
65
66	<para os="f">The following line needs to be added to
67	<filename>configparms</filename> to adjust installation paths:</para>
68
69	<screen os="g"><userinput>cat > configparms << EOF
70	install_root=${CLFS}
71	EOF</userinput></screen>
72
73	<para os="h">Prepare EGLIBC for compilation:</para>
74
75	<screen os="i"><userinput>BUILD_CC="gcc" CC="${CLFS_TARGET}-gcc" \
76	AR="${CLFS_TARGET}-ar" RANLIB="${CLFS_TARGET}-ranlib" \
77	../eglibc-&eglibc-version;/configure --prefix=/usr \
78	--libexecdir=/usr/lib/eglibc --host=${CLFS_TARGET} --build=${CLFS_HOST} \
79	--disable-profile --enable-add-ons --with-tls --enable-kernel=2.6.0 \
80	--with-__thread --with-binutils=${CLFS}/cross-tools/bin \
81	--with-headers=${CLFS}/usr/include --cache-file=config.cache</userinput></screen>
82
83	<variablelist os="j">
84	<title>The meaning of the new configure options:</title>
85
86	<varlistentry os="j1">
87	<term><parameter>BUILD_CC="gcc"</parameter></term>
88	<listitem>
89	<para>This tells EGLIBC to use the compiler on the host system. This is
90	used to create the tools EGLIBC uses during its build.</para>
91	</listitem>
92	</varlistentry>
93
94	<varlistentry os="j2">
95	<term><parameter>CC="${CLFS_TARGET}-gcc"</parameter></term>
96	<listitem>
97	<para>This forces EGLIBC to use the GCC compiler that we made for our target
98	architecture.</para>
99	</listitem>
100	</varlistentry>
101
102	<varlistentry os="j3">
103	<term><parameter>AR="${CLFS_TARGET}-ar"</parameter></term>
104	<listitem>
105	<para>This forces EGLIBC to use the <command>ar</command> utility
106	we made for our target architecture.</para>
107	</listitem>
108	</varlistentry>
109
110	<varlistentry os="j4">
111	<term><parameter>RANLIB="${CLFS_TARGET}-ranlib"</parameter></term>
112	<listitem>
113	<para>This forces EGLIBC to use the <command>ranlib</command> utility
114	we made for our target architecture.</para>
115	</listitem>
116	</varlistentry>
117
118	<varlistentry os="j5">
119	<term><parameter>--disable-profile</parameter></term>
120	<listitem>
121	<para>This builds the libraries without profiling information.
122	Omit this option if profiling on the temporary tools is necessary.</para>
123	</listitem>
124	</varlistentry>
125
126	<varlistentry os="j6">
127	<term><parameter>--enable-add-ons</parameter></term>
128	<listitem>
129	<para>This tells EGLIBC to utilize all add-ons that are
130	available.</para>
131	</listitem>
132	</varlistentry>
133
134	<varlistentry os="j7">
135	<term><parameter>--with-tls</parameter></term>
136	<listitem>
137	<para>This tells EGLIBC to use Thread Local Storage.</para>
138	</listitem>
139	</varlistentry>
140
141	<varlistentry os="j8">
142	<term><parameter>--with-__thread</parameter></term>
143	<listitem>
144	<para>This tells EGLIBC to use use the __thread for libc and
145	libpthread builds.</para>
146	</listitem>
147	</varlistentry>
148
149	<varlistentry os="j9">
150	<term><parameter>--with-binutils=${CLFS}/cross-tools/bin</parameter></term>
151	<listitem>
152	<para>This tells EGLIBC to use the Binutils that are specific to
153	our target architecture.</para>
154	</listitem>
155	</varlistentry>
156
157	<varlistentry os="j10">
158	<term><parameter>--cache-file=config.cache</parameter></term>
159	<listitem>
160	<para>This tells EGLIBC to utilize a premade cache file.</para>
161	</listitem>
162	</varlistentry>
163
164	</variablelist>
165
166	<para os="k">During this stage the following warning might appear:</para>
167
168	<blockquote os="l"><screen><computeroutput>configure: WARNING:
169	*** These auxiliary programs are missing or
170	*** incompatible versions: msgfmt
171	*** some features will be disabled.
172	*** Check the INSTALL file for required versions.</computeroutput></screen></blockquote>
173
174	<para os="m">The missing or incompatible <command>msgfmt</command> program is
175	generally harmless. This <command>msgfmt</command> program is part of the
176	Gettext package which the host distribution should provide.</para>
177
178	<para os="n">Compile the package:</para>
179
180	<screen os="o"><userinput>make</userinput></screen>
181
182	<para os="p">Install the package:</para>
183
184	<screen os="q"><userinput>make install</userinput></screen>
185
186	</sect2>
187
188	<sect2 id="i18n-eglibc" role="configuration">
189	<title>Internationalization</title>
190
191	<para>The locales that can make the system respond in a different
192	language were not installed by the above command. Install them
193	with:</para>
194
195	<screen><userinput>make localedata/install-locales</userinput></screen>
196
197	<para>To save time, an alternative to running the previous command (which
198	generates and installs every locale listed in the
199	eglibc-&eglibc-version;/localedata/SUPPORTED file) is to install only
200	those locales that are wanted and needed. This can be achieved by using
201	the <command>localedef</command> command. Information on this command is
202	located in the <filename>INSTALL</filename> file in the EGLIBC source.
203	However, there are a number of locales that are essential in order for the
204	tests of future packages to pass, in particular, the
205	<emphasis>libstdc++</emphasis> tests from GCC. The following instructions,
206	instead of the <parameter>install-locales</parameter> target used above,
207	will install the minimum set of locales necessary for the tests to run
208	successfully:</para>
209
210	<screen role="nodump"><userinput>make SUPPORTED-LOCALES="de_DE.UTF-8/UTF-8 de_DE/ISO-8859-1 de_DE@euro/ISO-8859-15 \
211	en_HK.UTF-8/UTF-8 en_HK/ISO-8859-1 \
212	en_PH.UTF-8/UTF-8 en_PH/ISO-8859-1 \
213	en_US.UTF-8/UTF-8 en_US/ISO-8859-1 \
214	es_MX.UTF-8/UTF-8 es_MX/ISO-8859-1 \
215	fa_IR/UTF-8 \
216	fr_FR.UTF-8/UTF-8 fr_FR/ISO-8859-1 fr_FR@euro/ISO-8859-15 \
217	it_IT.UTF-8/UTF-8 it_IT/ISO-8859-1 \
218	ja_JP.EUC-JP/EUC-JP ja_JP.UTF-8/UTF-8" localedata/install-locales</userinput></screen>
219
220	<para>Some locales installed by the <command>make
221	localedata/install-locales</command> command above are not properly
222	supported by some applications that are in the CLFS and CBLFS books. Because
223	of the various problems that arise due to application programmers making
224	assumptions that break in such locales, CLFS should not be used in locales
225	that utilize multibyte character sets (including UTF-8) or right-to-left
226	writing order. Numerous unofficial and unstable patches are required to
227	fix these problems, and it has been decided by the CLFS developers not to
228	support such complex locales at this time. This applies to the ja_JP and
229	fa_IR locales as well—they have been installed only for GCC and
230	Gettext tests to pass, and the <command>watch</command> program (part of
231	the Procps package) does not work properly in them. Various attempts to
232	circumvent these restrictions are documented in internationalization-related
233	hints.</para>
234
235	</sect2>
236
237	<sect2 id="conf-eglibc" role="configuration">
238	<title>Configuring EGLIBC</title>
239
240	<indexterm zone="conf-eglibc">
241	<primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
242	</indexterm>
243
244	<indexterm zone="conf-eglibc">
245	<primary sortas="e-/etc/localtime">/etc/localtime</primary>
246	</indexterm>
247
248	<para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
249	because, although EGLIBC provides defaults when this file is missing or
250	corrupt, the EGLIBC defaults do not work well in a networked environment.
251	The time zone also needs to be configured.</para>
252
253	<para>Create a new file <filename>/etc/nsswitch.conf</filename> by running
254	the following:</para>
255
256	<screen><userinput>cat > ${CLFS}/etc/nsswitch.conf << "EOF"
257	<literal># Begin /etc/nsswitch.conf
258
259	passwd: files
260	group: files
261	shadow: files
262
263	hosts: files dns
264	networks: files
265
266	protocols: files
267	services: files
268	ethers: files
269	rpc: files
270
271	# End /etc/nsswitch.conf</literal>
272	EOF</userinput></screen>
273
274	<para>To determine the local time zone, run the following script:</para>
275
276	<screen role="nodump"><userinput>TZDIR="${CLFS}/usr/share/zoneinfo" ${CLFS}/usr/bin/tzselect</userinput></screen>
277
278	<para>After answering a few questions about the location, the script will
279	output the name of the time zone (e.g., <emphasis>EST5EDT</emphasis> or
280	<emphasis>Canada/Eastern</emphasis>). Then create the
281	<filename>/etc/localtime</filename> file by running:</para>
282
283	<screen><userinput>cp -v --remove-destination ${CLFS}/usr/share/zoneinfo/<replaceable>[xxx]</replaceable> \
284	${CLFS}/etc/localtime</userinput></screen>
285
286	<para>Replace <replaceable>[xxx]</replaceable> with the name of the time zone
287	that <command>tzselect</command> provided (e.g., Canada/Eastern).</para>
288
289	<variablelist>
290	<title>The meaning of the cp option:</title>
291
292	<varlistentry>
293	<term><parameter>--remove-destination</parameter></term>
294	<listitem>
295	<para>This is needed to force removal of the already existing symbolic
296	link. The reason for copying the file instead of using a symlink is to
297	cover the situation where <filename class="directory">/usr</filename>
298	is on a separate partition. This could be important when booted into
299	single user mode.</para>
300	</listitem>
301	</varlistentry>
302	</variablelist>
303
304	</sect2>
305
306	<sect2 id="conf-ld" role="configuration">
307	<title>Configuring The Dynamic Loader</title>
308
309	<indexterm zone="conf-ld">
310	<primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
311	</indexterm>
312
313	<para>By default, the dynamic loader (<filename
314	class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
315	<filename class="directory">/lib</filename> and <filename
316	class="directory">/usr/lib</filename> for dynamic libraries that are
317	needed by programs as they are run. However, if there are libraries in
318	directories other than <filename class="directory">/lib</filename> and
319	<filename class="directory">/usr/lib</filename>, these need to be
320	added to the <filename>/etc/ld.so.conf</filename> file in order
321	for the dynamic loader to find them. Two directories that are commonly
322	known to contain additional libraries are <filename
323	class="directory">/usr/local/lib</filename> and <filename
324	class="directory">/opt/lib</filename>, so add those directories to the
325	dynamic loader's search path.</para>
326
327	<para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
328	following:</para>
329
330	<screen><userinput>cat > ${CLFS}/etc/ld.so.conf << "EOF"
331	<literal># Begin /etc/ld.so.conf
332
333	/usr/local/lib
334	/opt/lib
335
336	# End /etc/ld.so.conf</literal>
337	EOF</userinput></screen>
338
339	</sect2>
340
341	<sect2 id="contents-eglibc" role="content">
342	<title>Contents of EGLIBC</title>
343
344	<segmentedlist>
345	<segtitle>Installed programs</segtitle>
346	<segtitle>Installed libraries</segtitle>
347
348	<seglistitem>
349	<seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
350	ldd, lddlibc4, locale, localedef, mtrace, nscd,
351	pcprofiledump, pt_chown, rpcgen, rpcinfo, sln, sprof, tzselect, xtrace,
352	zdump, and zic</seg>
353	<seg>ld.so, libBrokenLocale.[a,so], libSegFault.so, libanl.[a,so],
354	libbsd-compat.a, libc.[a,so], libcrypt.[a,so], libdl.[a,so], libg.a,
355	libieee.a, libm.[a,so], libmcheck.a, libmemusage.so, libnsl.a,
356	libnss_compat.so, libnss_dns.so, libnss_files.so, libnss_hesiod.so,
357	libnss_nis.so, libnss_nisplus.so, libpcprofile.so, libpthread.[a,so],
358	libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so, and
359	libutil.[a,so]</seg>
360	</seglistitem>
361	</segmentedlist>
362
363	<variablelist>
364	<bridgehead renderas="sect3">Short Descriptions</bridgehead>
365	<?dbfo list-presentation="list"?>
366	<?dbhtml list-presentation="table"?>
367
368	<varlistentry id="catchsegv">
369	<term><command>catchsegv</command></term>
370	<listitem>
371	<para>Can be used to create a stack trace when a program
372	terminates with a segmentation fault</para>
373	<indexterm zone="ch-cross-tools-eglibc catchsegv">
374	<primary sortas="b-catchsegv">catchsegv</primary>
375	</indexterm>
376	</listitem>
377	</varlistentry>
378
379	<varlistentry id="gencat">
380	<term><command>gencat</command></term>
381	<listitem>
382	<para>Generates message catalogues</para>
383	<indexterm zone="ch-cross-tools-eglibc gencat">
384	<primary sortas="b-gencat">gencat</primary>
385	</indexterm>
386	</listitem>
387	</varlistentry>
388
389	<varlistentry id="getconf">
390	<term><command>getconf</command></term>
391	<listitem>
392	<para>Displays the system configuration values for file system specific
393	variables</para>
394	<indexterm zone="ch-cross-tools-eglibc getconf">
395	<primary sortas="b-getconf">getconf</primary>
396	</indexterm>
397	</listitem>
398	</varlistentry>
399
400	<varlistentry id="getent">
401	<term><command>getent</command></term>
402	<listitem>
403	<para>Gets entries from an administrative database</para>
404	<indexterm zone="ch-cross-tools-eglibc getent">
405	<primary sortas="b-getent">getent</primary>
406	</indexterm>
407	</listitem>
408	</varlistentry>
409
410	<varlistentry id="iconv">
411	<term><command>iconv</command></term>
412	<listitem>
413	<para>Performs character set conversion</para>
414	<indexterm zone="ch-cross-tools-eglibc iconv">
415	<primary sortas="b-iconv">iconv</primary>
416	</indexterm>
417	</listitem>
418	</varlistentry>
419
420	<varlistentry id="iconvconfig">
421	<term><command>iconvconfig</command></term>
422	<listitem>
423	<para>Creates fastloading <command>iconv</command> module configuration
424	files</para>
425	<indexterm zone="ch-cross-tools-eglibc iconvconfig">
426	<primary sortas="b-iconvconfig">iconvconfig</primary>
427	</indexterm>
428	</listitem>
429	</varlistentry>
430
431	<varlistentry id="ldconfig">
432	<term><command>ldconfig</command></term>
433	<listitem>
434	<para>Configures the dynamic linker runtime bindings</para>
435	<indexterm zone="ch-cross-tools-eglibc ldconfig">
436	<primary sortas="b-ldconfig">ldconfig</primary>
437	</indexterm>
438	</listitem>
439	</varlistentry>
440
441	<varlistentry id="ldd">
442	<term><command>ldd</command></term>
443	<listitem>
444	<para>Reports which shared libraries are required
445	by each given program or shared library</para>
446	<indexterm zone="ch-cross-tools-eglibc ldd">
447	<primary sortas="b-ldd">ldd</primary>
448	</indexterm>
449	</listitem>
450	</varlistentry>
451
452	<varlistentry id="lddlibc4">
453	<term><command>lddlibc4</command></term>
454	<listitem>
455	<para>Assists <command>ldd</command> with object files</para>
456	<indexterm zone="ch-cross-tools-eglibc lddlibc4">
457	<primary sortas="b-lddlibc4">lddlibc4</primary>
458	</indexterm>
459	</listitem>
460	</varlistentry>
461
462	<varlistentry id="locale">
463	<term><command>locale</command></term>
464	<listitem>
465	<para>Tells the compiler to enable or disable the use of POSIX locales
466	for built-in operations</para>
467	<indexterm zone="ch-cross-tools-eglibc locale">
468	<primary sortas="b-locale">locale</primary>
469	</indexterm>
470	</listitem>
471	</varlistentry>
472
473	<varlistentry id="localedef">
474	<term><command>localedef</command></term>
475	<listitem>
476	<para>Compiles locale specifications</para>
477	<indexterm zone="ch-cross-tools-eglibc localedef">
478	<primary sortas="b-localedef">localedef</primary>
479	</indexterm>
480	</listitem>
481	</varlistentry>
482
483	<varlistentry id="mtrace">
484	<term><command>mtrace</command></term>
485	<listitem>
486	<para>Reads and interprets a memory trace file and
487	displays a summary in human-readable format</para>
488	<indexterm zone="ch-cross-tools-eglibc mtrace">
489	<primary sortas="b-mtrace">mtrace</primary>
490	</indexterm>
491	</listitem>
492	</varlistentry>
493
494	<varlistentry id="nscd">
495	<term><command>nscd</command></term>
496	<listitem>
497	<para>A daemon that provides a cache for the most common name
498	service requests</para>
499	<indexterm zone="ch-cross-tools-eglibc nscd">
500	<primary sortas="b-nscd">nscd</primary>
501	</indexterm>
502	</listitem>
503	</varlistentry>
504
505	<varlistentry id="pcprofiledump">
506	<term><command>pcprofiledump</command></term>
507	<listitem>
508	<para>Dumps information generated by PC profiling</para>
509	<indexterm zone="ch-cross-tools-eglibc pcprofiledump">
510	<primary sortas="b-pcprofiledump">pcprofiledump</primary>
511	</indexterm>
512	</listitem>
513	</varlistentry>
514
515	<varlistentry id="pt_chown">
516	<term><command>pt_chown</command></term>
517	<listitem>
518	<para>A helper program for <command>grantpt</command> to set the owner,
519	group and access permissions of a slave pseudo terminal</para>
520	<indexterm zone="ch-cross-tools-eglibc pt_chown">
521	<primary sortas="b-pt_chown">pt_chown</primary>
522	</indexterm>
523	</listitem>
524	</varlistentry>
525
526	<varlistentry id="rpcgen">
527	<term><command>rpcgen</command></term>
528	<listitem>
529	<para>Generates C code to implement the Remote Procecure Call (RPC)
530	protocol</para>
531	<indexterm zone="ch-cross-tools-eglibc rpcgen">
532	<primary sortas="b-rpcgen">rpcgen</primary>
533	</indexterm>
534	</listitem>
535	</varlistentry>
536
537	<varlistentry id="rpcinfo">
538	<term><command>rpcinfo</command></term>
539	<listitem>
540	<para>Makes an RPC call to an RPC server</para>
541	<indexterm zone="ch-cross-tools-eglibc rpcinfo">
542	<primary sortas="b-rpcinfo">rpcinfo</primary>
543	</indexterm>
544	</listitem>
545	</varlistentry>
546
547	<varlistentry id="sln">
548	<term><command>sln</command></term>
549	<listitem>
550	<para>A statically linked program that creates symbolic links</para>
551	<indexterm zone="ch-cross-tools-eglibc sln">
552	<primary sortas="b-sln">sln</primary>
553	</indexterm>
554	</listitem>
555	</varlistentry>
556
557	<varlistentry id="sprof">
558	<term><command>sprof</command></term>
559	<listitem>
560	<para>Reads and displays shared object profiling data</para>
561	<indexterm zone="ch-cross-tools-eglibc sprof">
562	<primary sortas="b-sprof">sprof</primary>
563	</indexterm>
564	</listitem>
565	</varlistentry>
566
567	<varlistentry id="tzselect">
568	<term><command>tzselect</command></term>
569	<listitem>
570	<para>Asks the user about the location of the
571	system and reports the corresponding time zone description</para>
572	<indexterm zone="ch-cross-tools-eglibc tzselect">
573	<primary sortas="b-tzselect">tzselect</primary>
574	</indexterm>
575	</listitem>
576	</varlistentry>
577
578	<varlistentry id="xtrace">
579	<term><command>xtrace</command></term>
580	<listitem>
581	<para>Traces the execution of a program by
582	printing the currently executed function</para>
583	<indexterm zone="ch-cross-tools-eglibc xtrace">
584	<primary sortas="b-xtrace">xtrace</primary>
585	</indexterm>
586	</listitem>
587	</varlistentry>
588
589	<varlistentry id="zdump">
590	<term><command>zdump</command></term>
591	<listitem>
592	<para>The time zone dumper</para>
593	<indexterm zone="ch-cross-tools-eglibc zdump">
594	<primary sortas="b-zdump">zdump</primary>
595	</indexterm>
596	</listitem>
597	</varlistentry>
598
599	<varlistentry id="zic">
600	<term><command>zic</command></term>
601	<listitem>
602	<para>The time zone compiler</para>
603	<indexterm zone="ch-cross-tools-eglibc zic">
604	<primary sortas="b-zic">zic</primary>
605	</indexterm>
606	</listitem>
607	</varlistentry>
608
609	<varlistentry id="ld.so">
610	<term><filename class="libraryfile">ld.so</filename></term>
611	<listitem>
612	<para>The helper program for shared library executables</para>
613	<indexterm zone="ch-cross-tools-eglibc ld.so">
614	<primary sortas="c-ld.so">ld.so</primary>
615	</indexterm>
616	</listitem>
617	</varlistentry>
618
619	<varlistentry id="libBrokenLocale">
620	<term><filename class="libraryfile">libBrokenLocale</filename></term>
621	<listitem>
622	<para>Used by programs, such as Mozilla, to solve broken locales</para>
623	<indexterm zone="ch-cross-tools-eglibc libBrokenLocale">
624	<primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
625	</indexterm>
626	</listitem>
627	</varlistentry>
628
629	<varlistentry id="libSegFault">
630	<term><filename class="libraryfile">libSegFault</filename></term>
631	<listitem>
632	<para>The segmentation fault signal handler</para>
633	<indexterm zone="ch-cross-tools-eglibc libSegFault">
634	<primary sortas="c-libSegFault">libSegFault</primary>
635	</indexterm>
636	</listitem>
637	</varlistentry>
638
639	<varlistentry id="libanl">
640	<term><filename class="libraryfile">libanl</filename></term>
641	<listitem>
642	<para>An asynchronous name lookup library</para>
643	<indexterm zone="ch-cross-tools-eglibc libanl">
644	<primary sortas="c-libanl">libanl</primary>
645	</indexterm>
646	</listitem>
647	</varlistentry>
648
649	<varlistentry id="libbsd-compat">
650	<term><filename class="libraryfile">libbsd-compat</filename></term>
651	<listitem>
652	<para>Provides the portability needed
653	in order to run certain Berkey Software Distribution (BSD) programs
654	under Linux</para>
655	<indexterm zone="ch-cross-tools-eglibc libbsd-compat">
656	<primary sortas="c-libbsd-compat">libbsd-compat</primary>
657	</indexterm>
658	</listitem>
659	</varlistentry>
660
661	<varlistentry id="libc">
662	<term><filename class="libraryfile">libc</filename></term>
663	<listitem>
664	<para>The main C library</para>
665	<indexterm zone="ch-cross-tools-eglibc libc">
666	<primary sortas="c-libc">libc</primary>
667	</indexterm>
668	</listitem>
669	</varlistentry>
670
671	<varlistentry id="libcrypt">
672	<term><filename class="libraryfile">libcrypt</filename></term>
673	<listitem>
674	<para>The cryptography library</para>
675	<indexterm zone="ch-cross-tools-eglibc libcrypt">
676	<primary sortas="c-libcrypt">libcrypt</primary>
677	</indexterm>
678	</listitem>
679	</varlistentry>
680
681	<varlistentry id="libdl">
682	<term><filename class="libraryfile">libdl</filename></term>
683	<listitem>
684	<para>The dynamic linking interface library</para>
685	<indexterm zone="ch-cross-tools-eglibc libdl">
686	<primary sortas="c-libdl">libdl</primary>
687	</indexterm>
688	</listitem>
689	</varlistentry>
690
691	<varlistentry id="libg">
692	<term><filename class="libraryfile">libg</filename></term>
693	<listitem>
694	<para>A runtime library for <command>g++</command></para>
695	<indexterm zone="ch-cross-tools-eglibc libg">
696	<primary sortas="c-libg">libg</primary>
697	</indexterm>
698	</listitem>
699	</varlistentry>
700
701	<varlistentry id="libieee">
702	<term><filename class="libraryfile">libieee</filename></term>
703	<listitem>
704	<para>The Institute of Electrical and Electronic Engineers (IEEE)
705	floating point library</para>
706	<indexterm zone="ch-cross-tools-eglibc libieee">
707	<primary sortas="c-libieee">libieee</primary>
708	</indexterm>
709	</listitem>
710	</varlistentry>
711
712	<varlistentry id="libm">
713	<term><filename class="libraryfile">libm</filename></term>
714	<listitem>
715	<para>The mathematical library</para>
716	<indexterm zone="ch-cross-tools-eglibc libm">
717	<primary sortas="c-libm">libm</primary>
718	</indexterm>
719	</listitem>
720	</varlistentry>
721
722	<varlistentry id="libmcheck">
723	<term><filename class="libraryfile">libmcheck</filename></term>
724	<listitem>
725	<para>Contains code run at boot</para>
726	<indexterm zone="ch-cross-tools-eglibc libmcheck">
727	<primary sortas="c-libmcheck">libmcheck</primary>
728	</indexterm>
729	</listitem>
730	</varlistentry>
731
732	<varlistentry id="libmemusage">
733	<term><filename class="libraryfile">libmemusage</filename></term>
734	<listitem>
735	<para>Used by <command>memusage</command> (included in EGLIBC, but
736	not built in a base CLFS system as it has additional dependencies)
737	to help collect information about the memory usage of a program</para>
738	<indexterm zone="ch-cross-tools-eglibc libmemusage">
739	<primary sortas="c-libmemusage">libmemusage</primary>
740	</indexterm>
741	</listitem>
742	</varlistentry>
743
744	<varlistentry id="libnsl">
745	<term><filename class="libraryfile">libnsl</filename></term>
746	<listitem>
747	<para>The network services library</para>
748	<indexterm zone="ch-cross-tools-eglibc libnsl">
749	<primary sortas="c-libnsl">libnsl</primary>
750	</indexterm>
751	</listitem>
752	</varlistentry>
753
754	<varlistentry id="libnss">
755	<term><filename class="libraryfile">libnss</filename></term>
756	<listitem>
757	<para>The Name Service Switch libraries, containing functions for
758	resolving host names, user names, group names, aliases, services,
759	protocols, etc.</para>
760	<indexterm zone="ch-cross-tools-eglibc libnss">
761	<primary sortas="c-libnss">libnss</primary>
762	</indexterm>
763	</listitem>
764	</varlistentry>
765
766	<varlistentry id="libpcprofile">
767	<term><filename class="libraryfile">libpcprofile</filename></term>
768	<listitem>
769	<para>Contains profiling functions used to track the amount of CPU
770	time spent in specific source code lines</para>
771	<indexterm zone="ch-cross-tools-eglibc libpcprofile">
772	<primary sortas="c-libpcprofile">libpcprofile</primary>
773	</indexterm>
774	</listitem>
775	</varlistentry>
776
777	<varlistentry id="libpthread">
778	<term><filename class="libraryfile">libpthread</filename></term>
779	<listitem>
780	<para>The POSIX threads library</para>
781	<indexterm zone="ch-cross-tools-eglibc libpthread">
782	<primary sortas="c-libpthread">libpthread</primary>
783	</indexterm>
784	</listitem>
785	</varlistentry>
786
787	<varlistentry id="libresolv">
788	<term><filename class="libraryfile">libresolv</filename></term>
789	<listitem>
790	<para>Contains functions for creating, sending, and interpreting
791	packets to the Internet domain name servers</para>
792	<indexterm zone="ch-cross-tools-eglibc libresolv">
793	<primary sortas="c-libresolv">libresolv</primary>
794	</indexterm>
795	</listitem>
796	</varlistentry>
797
798	<varlistentry id="librpcsvc">
799	<term><filename class="libraryfile">librpcsvc</filename></term>
800	<listitem>
801	<para>Contains functions providing miscellaneous RPC services</para>
802	<indexterm zone="ch-cross-tools-eglibc librpcsvc">
803	<primary sortas="c-librpcsvc">librpcsvc</primary>
804	</indexterm>
805	</listitem>
806	</varlistentry>
807
808	<varlistentry id="librt">
809	<term><filename class="libraryfile">librt</filename></term>
810	<listitem>
811	<para>Contains functions providing most of the interfaces specified by
812	the POSIX.1b Realtime Extension</para>
813	<indexterm zone="ch-cross-tools-eglibc librt">
814	<primary sortas="c-librt">librt</primary>
815	</indexterm>
816	</listitem>
817	</varlistentry>
818
819	<varlistentry id="libthread_db">
820	<term><filename class="libraryfile">libthread_db</filename></term>
821	<listitem>
822	<para>Contains functions useful for
823	building debuggers for multi-threaded programs</para>
824	<indexterm zone="ch-cross-tools-eglibc libthread_db">
825	<primary sortas="c-libthread_db">libthread_db</primary>
826	</indexterm>
827	</listitem>
828	</varlistentry>
829
830	<varlistentry id="libutil">
831	<term><filename class="libraryfile">libutil</filename></term>
832	<listitem>
833	<para>Contains code for <quote>standard</quote> functions used in
834	many different Unix utilities</para>
835	<indexterm zone="ch-cross-tools-eglibc libutil">
836	<primary sortas="c-libutil">libutil</primary>
837	</indexterm>
838	</listitem>
839	</varlistentry>
840
841	</variablelist>
842
843	</sect2>
844
845	</sect1>

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