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source: clfs-sysroot/BOOK/cross-tools/common/eglibc.xml@ 4fc026e

Last change on this file since 4fc026e was bf90190, checked in by Joe Ciccone <jciccone@…>, 15 years ago
Add a seperate build of Localedef to EGLIBC and fix the installation of locales.
Property mode set to `100644`
File size: 31.8 KB

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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>To install locales we need to compile our own version of
192	localedef to run nativly on the host system, so we have to extract the
193	eglibc-localedef-&eglibc-version; package into our eglibc-&eglibc-version;
194	directory:</para>
195
196	<screen><userinput>tar -jxvf ../eglibc-localedef-&eglibc-ports-dl-version;.tar.bz2
197	cd localedef</userinput></screen>
198
199	<para>Prepare localedef for compilation:</para>
200
201	<screen><userinput>./configure --prefix=${CLFS}/usr \
202	--with-glibc=../../eglibc-&eglibc-version;</userinput></screen>
203
204	<para>Compile the package:</para>
205
206	<screen><userinput>make</userinput></screen>
207
208	<para>The locales that can make the system respond in a different
209	language were not installed with EGLIBC. Install them
210	with:</para>
211
212	<screen><userinput>make install-locales</userinput></screen>
213
214	<para>To save time, an alternative to running the previous command (which
215	generates and installs every locale listed in the
216	eglibc-&eglibc-version;/localedata/SUPPORTED file) is to install only
217	those locales that are wanted and needed. This can be achieved by using
218	the <command>localedef</command> command. Information on this command is
219	located in the <filename>INSTALL</filename> file in the EGLIBC source.
220	However, there are a number of locales that are essential in order for the
221	tests of future packages to pass, in particular, the
222	<emphasis>libstdc++</emphasis> tests from GCC. The following instructions,
223	instead of the <parameter>install-locales</parameter> target used above,
224	will install the minimum set of locales necessary for the tests to run
225	successfully:</para>
226
227	<screen role="nodump"><userinput>make SUPPORTED-LOCALES="de_DE.UTF-8/UTF-8 de_DE/ISO-8859-1 de_DE@euro/ISO-8859-15 \
228	en_HK.UTF-8/UTF-8 en_HK/ISO-8859-1 \
229	en_PH.UTF-8/UTF-8 en_PH/ISO-8859-1 \
230	en_US.UTF-8/UTF-8 en_US/ISO-8859-1 \
231	es_MX.UTF-8/UTF-8 es_MX/ISO-8859-1 \
232	fa_IR/UTF-8 \
233	fr_FR.UTF-8/UTF-8 fr_FR/ISO-8859-1 fr_FR@euro/ISO-8859-15 \
234	it_IT.UTF-8/UTF-8 it_IT/ISO-8859-1 \
235	ja_JP.EUC-JP/EUC-JP ja_JP.UTF-8/UTF-8" install-locales</userinput></screen>
236
237	<para>Some locales installed by the <command>make
238	localedata/install-locales</command> command above are not properly
239	supported by some applications that are in the CLFS and CBLFS books. Because
240	of the various problems that arise due to application programmers making
241	assumptions that break in such locales, CLFS should not be used in locales
242	that utilize multibyte character sets (including UTF-8) or right-to-left
243	writing order. Numerous unofficial and unstable patches are required to
244	fix these problems, and it has been decided by the CLFS developers not to
245	support such complex locales at this time. This applies to the ja_JP and
246	fa_IR locales as well—they have been installed only for GCC and
247	Gettext tests to pass, and the <command>watch</command> program (part of
248	the Procps package) does not work properly in them. Various attempts to
249	circumvent these restrictions are documented in internationalization-related
250	hints.</para>
251
252	</sect2>
253
254	<sect2 id="conf-eglibc" role="configuration">
255	<title>Configuring EGLIBC</title>
256
257	<indexterm zone="conf-eglibc">
258	<primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
259	</indexterm>
260
261	<indexterm zone="conf-eglibc">
262	<primary sortas="e-/etc/localtime">/etc/localtime</primary>
263	</indexterm>
264
265	<para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
266	because, although EGLIBC provides defaults when this file is missing or
267	corrupt, the EGLIBC defaults do not work well in a networked environment.
268	The time zone also needs to be configured.</para>
269
270	<para>Create a new file <filename>/etc/nsswitch.conf</filename> by running
271	the following:</para>
272
273	<screen><userinput>cat > ${CLFS}/etc/nsswitch.conf << "EOF"
274	<literal># Begin /etc/nsswitch.conf
275
276	passwd: files
277	group: files
278	shadow: files
279
280	hosts: files dns
281	networks: files
282
283	protocols: files
284	services: files
285	ethers: files
286	rpc: files
287
288	# End /etc/nsswitch.conf</literal>
289	EOF</userinput></screen>
290
291	<para>To determine the local time zone, run the following script:</para>
292
293	<screen role="nodump"><userinput>TZDIR="${CLFS}/usr/share/zoneinfo" ${CLFS}/usr/bin/tzselect</userinput></screen>
294
295	<para>After answering a few questions about the location, the script will
296	output the name of the time zone (e.g., <emphasis>EST5EDT</emphasis> or
297	<emphasis>Canada/Eastern</emphasis>). Then create the
298	<filename>/etc/localtime</filename> file by running:</para>
299
300	<screen><userinput>cp -v --remove-destination ${CLFS}/usr/share/zoneinfo/<replaceable>[xxx]</replaceable> \
301	${CLFS}/etc/localtime</userinput></screen>
302
303	<para>Replace <replaceable>[xxx]</replaceable> with the name of the time zone
304	that <command>tzselect</command> provided (e.g., Canada/Eastern).</para>
305
306	<variablelist>
307	<title>The meaning of the cp option:</title>
308
309	<varlistentry>
310	<term><parameter>--remove-destination</parameter></term>
311	<listitem>
312	<para>This is needed to force removal of the already existing symbolic
313	link. The reason for copying the file instead of using a symlink is to
314	cover the situation where <filename class="directory">/usr</filename>
315	is on a separate partition. This could be important when booted into
316	single user mode.</para>
317	</listitem>
318	</varlistentry>
319	</variablelist>
320
321	</sect2>
322
323	<sect2 id="conf-ld" role="configuration">
324	<title>Configuring The Dynamic Loader</title>
325
326	<indexterm zone="conf-ld">
327	<primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
328	</indexterm>
329
330	<para>By default, the dynamic loader (<filename
331	class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
332	<filename class="directory">/lib</filename> and <filename
333	class="directory">/usr/lib</filename> for dynamic libraries that are
334	needed by programs as they are run. However, if there are libraries in
335	directories other than <filename class="directory">/lib</filename> and
336	<filename class="directory">/usr/lib</filename>, these need to be
337	added to the <filename>/etc/ld.so.conf</filename> file in order
338	for the dynamic loader to find them. Two directories that are commonly
339	known to contain additional libraries are <filename
340	class="directory">/usr/local/lib</filename> and <filename
341	class="directory">/opt/lib</filename>, so add those directories to the
342	dynamic loader's search path.</para>
343
344	<para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
345	following:</para>
346
347	<screen><userinput>cat > ${CLFS}/etc/ld.so.conf << "EOF"
348	<literal># Begin /etc/ld.so.conf
349
350	/usr/local/lib
351	/opt/lib
352
353	# End /etc/ld.so.conf</literal>
354	EOF</userinput></screen>
355
356	</sect2>
357
358	<sect2 id="contents-eglibc" role="content">
359	<title>Contents of EGLIBC</title>
360
361	<segmentedlist>
362	<segtitle>Installed programs</segtitle>
363	<segtitle>Installed libraries</segtitle>
364
365	<seglistitem>
366	<seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
367	ldd, lddlibc4, locale, localedef, mtrace, nscd,
368	pcprofiledump, pt_chown, rpcgen, rpcinfo, sln, sprof, tzselect, xtrace,
369	zdump, and zic</seg>
370	<seg>ld.so, libBrokenLocale.[a,so], libSegFault.so, libanl.[a,so],
371	libbsd-compat.a, libc.[a,so], libcrypt.[a,so], libdl.[a,so], libg.a,
372	libieee.a, libm.[a,so], libmcheck.a, libmemusage.so, libnsl.a,
373	libnss_compat.so, libnss_dns.so, libnss_files.so, libnss_hesiod.so,
374	libnss_nis.so, libnss_nisplus.so, libpcprofile.so, libpthread.[a,so],
375	libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so, and
376	libutil.[a,so]</seg>
377	</seglistitem>
378	</segmentedlist>
379
380	<variablelist>
381	<bridgehead renderas="sect3">Short Descriptions</bridgehead>
382	<?dbfo list-presentation="list"?>
383	<?dbhtml list-presentation="table"?>
384
385	<varlistentry id="catchsegv">
386	<term><command>catchsegv</command></term>
387	<listitem>
388	<para>Can be used to create a stack trace when a program
389	terminates with a segmentation fault</para>
390	<indexterm zone="ch-cross-tools-eglibc catchsegv">
391	<primary sortas="b-catchsegv">catchsegv</primary>
392	</indexterm>
393	</listitem>
394	</varlistentry>
395
396	<varlistentry id="gencat">
397	<term><command>gencat</command></term>
398	<listitem>
399	<para>Generates message catalogues</para>
400	<indexterm zone="ch-cross-tools-eglibc gencat">
401	<primary sortas="b-gencat">gencat</primary>
402	</indexterm>
403	</listitem>
404	</varlistentry>
405
406	<varlistentry id="getconf">
407	<term><command>getconf</command></term>
408	<listitem>
409	<para>Displays the system configuration values for file system specific
410	variables</para>
411	<indexterm zone="ch-cross-tools-eglibc getconf">
412	<primary sortas="b-getconf">getconf</primary>
413	</indexterm>
414	</listitem>
415	</varlistentry>
416
417	<varlistentry id="getent">
418	<term><command>getent</command></term>
419	<listitem>
420	<para>Gets entries from an administrative database</para>
421	<indexterm zone="ch-cross-tools-eglibc getent">
422	<primary sortas="b-getent">getent</primary>
423	</indexterm>
424	</listitem>
425	</varlistentry>
426
427	<varlistentry id="iconv">
428	<term><command>iconv</command></term>
429	<listitem>
430	<para>Performs character set conversion</para>
431	<indexterm zone="ch-cross-tools-eglibc iconv">
432	<primary sortas="b-iconv">iconv</primary>
433	</indexterm>
434	</listitem>
435	</varlistentry>
436
437	<varlistentry id="iconvconfig">
438	<term><command>iconvconfig</command></term>
439	<listitem>
440	<para>Creates fastloading <command>iconv</command> module configuration
441	files</para>
442	<indexterm zone="ch-cross-tools-eglibc iconvconfig">
443	<primary sortas="b-iconvconfig">iconvconfig</primary>
444	</indexterm>
445	</listitem>
446	</varlistentry>
447
448	<varlistentry id="ldconfig">
449	<term><command>ldconfig</command></term>
450	<listitem>
451	<para>Configures the dynamic linker runtime bindings</para>
452	<indexterm zone="ch-cross-tools-eglibc ldconfig">
453	<primary sortas="b-ldconfig">ldconfig</primary>
454	</indexterm>
455	</listitem>
456	</varlistentry>
457
458	<varlistentry id="ldd">
459	<term><command>ldd</command></term>
460	<listitem>
461	<para>Reports which shared libraries are required
462	by each given program or shared library</para>
463	<indexterm zone="ch-cross-tools-eglibc ldd">
464	<primary sortas="b-ldd">ldd</primary>
465	</indexterm>
466	</listitem>
467	</varlistentry>
468
469	<varlistentry id="lddlibc4">
470	<term><command>lddlibc4</command></term>
471	<listitem>
472	<para>Assists <command>ldd</command> with object files</para>
473	<indexterm zone="ch-cross-tools-eglibc lddlibc4">
474	<primary sortas="b-lddlibc4">lddlibc4</primary>
475	</indexterm>
476	</listitem>
477	</varlistentry>
478
479	<varlistentry id="locale">
480	<term><command>locale</command></term>
481	<listitem>
482	<para>Tells the compiler to enable or disable the use of POSIX locales
483	for built-in operations</para>
484	<indexterm zone="ch-cross-tools-eglibc locale">
485	<primary sortas="b-locale">locale</primary>
486	</indexterm>
487	</listitem>
488	</varlistentry>
489
490	<varlistentry id="localedef">
491	<term><command>localedef</command></term>
492	<listitem>
493	<para>Compiles locale specifications</para>
494	<indexterm zone="ch-cross-tools-eglibc localedef">
495	<primary sortas="b-localedef">localedef</primary>
496	</indexterm>
497	</listitem>
498	</varlistentry>
499
500	<varlistentry id="mtrace">
501	<term><command>mtrace</command></term>
502	<listitem>
503	<para>Reads and interprets a memory trace file and
504	displays a summary in human-readable format</para>
505	<indexterm zone="ch-cross-tools-eglibc mtrace">
506	<primary sortas="b-mtrace">mtrace</primary>
507	</indexterm>
508	</listitem>
509	</varlistentry>
510
511	<varlistentry id="nscd">
512	<term><command>nscd</command></term>
513	<listitem>
514	<para>A daemon that provides a cache for the most common name
515	service requests</para>
516	<indexterm zone="ch-cross-tools-eglibc nscd">
517	<primary sortas="b-nscd">nscd</primary>
518	</indexterm>
519	</listitem>
520	</varlistentry>
521
522	<varlistentry id="pcprofiledump">
523	<term><command>pcprofiledump</command></term>
524	<listitem>
525	<para>Dumps information generated by PC profiling</para>
526	<indexterm zone="ch-cross-tools-eglibc pcprofiledump">
527	<primary sortas="b-pcprofiledump">pcprofiledump</primary>
528	</indexterm>
529	</listitem>
530	</varlistentry>
531
532	<varlistentry id="pt_chown">
533	<term><command>pt_chown</command></term>
534	<listitem>
535	<para>A helper program for <command>grantpt</command> to set the owner,
536	group and access permissions of a slave pseudo terminal</para>
537	<indexterm zone="ch-cross-tools-eglibc pt_chown">
538	<primary sortas="b-pt_chown">pt_chown</primary>
539	</indexterm>
540	</listitem>
541	</varlistentry>
542
543	<varlistentry id="rpcgen">
544	<term><command>rpcgen</command></term>
545	<listitem>
546	<para>Generates C code to implement the Remote Procecure Call (RPC)
547	protocol</para>
548	<indexterm zone="ch-cross-tools-eglibc rpcgen">
549	<primary sortas="b-rpcgen">rpcgen</primary>
550	</indexterm>
551	</listitem>
552	</varlistentry>
553
554	<varlistentry id="rpcinfo">
555	<term><command>rpcinfo</command></term>
556	<listitem>
557	<para>Makes an RPC call to an RPC server</para>
558	<indexterm zone="ch-cross-tools-eglibc rpcinfo">
559	<primary sortas="b-rpcinfo">rpcinfo</primary>
560	</indexterm>
561	</listitem>
562	</varlistentry>
563
564	<varlistentry id="sln">
565	<term><command>sln</command></term>
566	<listitem>
567	<para>A statically linked program that creates symbolic links</para>
568	<indexterm zone="ch-cross-tools-eglibc sln">
569	<primary sortas="b-sln">sln</primary>
570	</indexterm>
571	</listitem>
572	</varlistentry>
573
574	<varlistentry id="sprof">
575	<term><command>sprof</command></term>
576	<listitem>
577	<para>Reads and displays shared object profiling data</para>
578	<indexterm zone="ch-cross-tools-eglibc sprof">
579	<primary sortas="b-sprof">sprof</primary>
580	</indexterm>
581	</listitem>
582	</varlistentry>
583
584	<varlistentry id="tzselect">
585	<term><command>tzselect</command></term>
586	<listitem>
587	<para>Asks the user about the location of the
588	system and reports the corresponding time zone description</para>
589	<indexterm zone="ch-cross-tools-eglibc tzselect">
590	<primary sortas="b-tzselect">tzselect</primary>
591	</indexterm>
592	</listitem>
593	</varlistentry>
594
595	<varlistentry id="xtrace">
596	<term><command>xtrace</command></term>
597	<listitem>
598	<para>Traces the execution of a program by
599	printing the currently executed function</para>
600	<indexterm zone="ch-cross-tools-eglibc xtrace">
601	<primary sortas="b-xtrace">xtrace</primary>
602	</indexterm>
603	</listitem>
604	</varlistentry>
605
606	<varlistentry id="zdump">
607	<term><command>zdump</command></term>
608	<listitem>
609	<para>The time zone dumper</para>
610	<indexterm zone="ch-cross-tools-eglibc zdump">
611	<primary sortas="b-zdump">zdump</primary>
612	</indexterm>
613	</listitem>
614	</varlistentry>
615
616	<varlistentry id="zic">
617	<term><command>zic</command></term>
618	<listitem>
619	<para>The time zone compiler</para>
620	<indexterm zone="ch-cross-tools-eglibc zic">
621	<primary sortas="b-zic">zic</primary>
622	</indexterm>
623	</listitem>
624	</varlistentry>
625
626	<varlistentry id="ld.so">
627	<term><filename class="libraryfile">ld.so</filename></term>
628	<listitem>
629	<para>The helper program for shared library executables</para>
630	<indexterm zone="ch-cross-tools-eglibc ld.so">
631	<primary sortas="c-ld.so">ld.so</primary>
632	</indexterm>
633	</listitem>
634	</varlistentry>
635
636	<varlistentry id="libBrokenLocale">
637	<term><filename class="libraryfile">libBrokenLocale</filename></term>
638	<listitem>
639	<para>Used by programs, such as Mozilla, to solve broken locales</para>
640	<indexterm zone="ch-cross-tools-eglibc libBrokenLocale">
641	<primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
642	</indexterm>
643	</listitem>
644	</varlistentry>
645
646	<varlistentry id="libSegFault">
647	<term><filename class="libraryfile">libSegFault</filename></term>
648	<listitem>
649	<para>The segmentation fault signal handler</para>
650	<indexterm zone="ch-cross-tools-eglibc libSegFault">
651	<primary sortas="c-libSegFault">libSegFault</primary>
652	</indexterm>
653	</listitem>
654	</varlistentry>
655
656	<varlistentry id="libanl">
657	<term><filename class="libraryfile">libanl</filename></term>
658	<listitem>
659	<para>An asynchronous name lookup library</para>
660	<indexterm zone="ch-cross-tools-eglibc libanl">
661	<primary sortas="c-libanl">libanl</primary>
662	</indexterm>
663	</listitem>
664	</varlistentry>
665
666	<varlistentry id="libbsd-compat">
667	<term><filename class="libraryfile">libbsd-compat</filename></term>
668	<listitem>
669	<para>Provides the portability needed
670	in order to run certain Berkey Software Distribution (BSD) programs
671	under Linux</para>
672	<indexterm zone="ch-cross-tools-eglibc libbsd-compat">
673	<primary sortas="c-libbsd-compat">libbsd-compat</primary>
674	</indexterm>
675	</listitem>
676	</varlistentry>
677
678	<varlistentry id="libc">
679	<term><filename class="libraryfile">libc</filename></term>
680	<listitem>
681	<para>The main C library</para>
682	<indexterm zone="ch-cross-tools-eglibc libc">
683	<primary sortas="c-libc">libc</primary>
684	</indexterm>
685	</listitem>
686	</varlistentry>
687
688	<varlistentry id="libcrypt">
689	<term><filename class="libraryfile">libcrypt</filename></term>
690	<listitem>
691	<para>The cryptography library</para>
692	<indexterm zone="ch-cross-tools-eglibc libcrypt">
693	<primary sortas="c-libcrypt">libcrypt</primary>
694	</indexterm>
695	</listitem>
696	</varlistentry>
697
698	<varlistentry id="libdl">
699	<term><filename class="libraryfile">libdl</filename></term>
700	<listitem>
701	<para>The dynamic linking interface library</para>
702	<indexterm zone="ch-cross-tools-eglibc libdl">
703	<primary sortas="c-libdl">libdl</primary>
704	</indexterm>
705	</listitem>
706	</varlistentry>
707
708	<varlistentry id="libg">
709	<term><filename class="libraryfile">libg</filename></term>
710	<listitem>
711	<para>A runtime library for <command>g++</command></para>
712	<indexterm zone="ch-cross-tools-eglibc libg">
713	<primary sortas="c-libg">libg</primary>
714	</indexterm>
715	</listitem>
716	</varlistentry>
717
718	<varlistentry id="libieee">
719	<term><filename class="libraryfile">libieee</filename></term>
720	<listitem>
721	<para>The Institute of Electrical and Electronic Engineers (IEEE)
722	floating point library</para>
723	<indexterm zone="ch-cross-tools-eglibc libieee">
724	<primary sortas="c-libieee">libieee</primary>
725	</indexterm>
726	</listitem>
727	</varlistentry>
728
729	<varlistentry id="libm">
730	<term><filename class="libraryfile">libm</filename></term>
731	<listitem>
732	<para>The mathematical library</para>
733	<indexterm zone="ch-cross-tools-eglibc libm">
734	<primary sortas="c-libm">libm</primary>
735	</indexterm>
736	</listitem>
737	</varlistentry>
738
739	<varlistentry id="libmcheck">
740	<term><filename class="libraryfile">libmcheck</filename></term>
741	<listitem>
742	<para>Contains code run at boot</para>
743	<indexterm zone="ch-cross-tools-eglibc libmcheck">
744	<primary sortas="c-libmcheck">libmcheck</primary>
745	</indexterm>
746	</listitem>
747	</varlistentry>
748
749	<varlistentry id="libmemusage">
750	<term><filename class="libraryfile">libmemusage</filename></term>
751	<listitem>
752	<para>Used by <command>memusage</command> (included in EGLIBC, but
753	not built in a base CLFS system as it has additional dependencies)
754	to help collect information about the memory usage of a program</para>
755	<indexterm zone="ch-cross-tools-eglibc libmemusage">
756	<primary sortas="c-libmemusage">libmemusage</primary>
757	</indexterm>
758	</listitem>
759	</varlistentry>
760
761	<varlistentry id="libnsl">
762	<term><filename class="libraryfile">libnsl</filename></term>
763	<listitem>
764	<para>The network services library</para>
765	<indexterm zone="ch-cross-tools-eglibc libnsl">
766	<primary sortas="c-libnsl">libnsl</primary>
767	</indexterm>
768	</listitem>
769	</varlistentry>
770
771	<varlistentry id="libnss">
772	<term><filename class="libraryfile">libnss</filename></term>
773	<listitem>
774	<para>The Name Service Switch libraries, containing functions for
775	resolving host names, user names, group names, aliases, services,
776	protocols, etc.</para>
777	<indexterm zone="ch-cross-tools-eglibc libnss">
778	<primary sortas="c-libnss">libnss</primary>
779	</indexterm>
780	</listitem>
781	</varlistentry>
782
783	<varlistentry id="libpcprofile">
784	<term><filename class="libraryfile">libpcprofile</filename></term>
785	<listitem>
786	<para>Contains profiling functions used to track the amount of CPU
787	time spent in specific source code lines</para>
788	<indexterm zone="ch-cross-tools-eglibc libpcprofile">
789	<primary sortas="c-libpcprofile">libpcprofile</primary>
790	</indexterm>
791	</listitem>
792	</varlistentry>
793
794	<varlistentry id="libpthread">
795	<term><filename class="libraryfile">libpthread</filename></term>
796	<listitem>
797	<para>The POSIX threads library</para>
798	<indexterm zone="ch-cross-tools-eglibc libpthread">
799	<primary sortas="c-libpthread">libpthread</primary>
800	</indexterm>
801	</listitem>
802	</varlistentry>
803
804	<varlistentry id="libresolv">
805	<term><filename class="libraryfile">libresolv</filename></term>
806	<listitem>
807	<para>Contains functions for creating, sending, and interpreting
808	packets to the Internet domain name servers</para>
809	<indexterm zone="ch-cross-tools-eglibc libresolv">
810	<primary sortas="c-libresolv">libresolv</primary>
811	</indexterm>
812	</listitem>
813	</varlistentry>
814
815	<varlistentry id="librpcsvc">
816	<term><filename class="libraryfile">librpcsvc</filename></term>
817	<listitem>
818	<para>Contains functions providing miscellaneous RPC services</para>
819	<indexterm zone="ch-cross-tools-eglibc librpcsvc">
820	<primary sortas="c-librpcsvc">librpcsvc</primary>
821	</indexterm>
822	</listitem>
823	</varlistentry>
824
825	<varlistentry id="librt">
826	<term><filename class="libraryfile">librt</filename></term>
827	<listitem>
828	<para>Contains functions providing most of the interfaces specified by
829	the POSIX.1b Realtime Extension</para>
830	<indexterm zone="ch-cross-tools-eglibc librt">
831	<primary sortas="c-librt">librt</primary>
832	</indexterm>
833	</listitem>
834	</varlistentry>
835
836	<varlistentry id="libthread_db">
837	<term><filename class="libraryfile">libthread_db</filename></term>
838	<listitem>
839	<para>Contains functions useful for
840	building debuggers for multi-threaded programs</para>
841	<indexterm zone="ch-cross-tools-eglibc libthread_db">
842	<primary sortas="c-libthread_db">libthread_db</primary>
843	</indexterm>
844	</listitem>
845	</varlistentry>
846
847	<varlistentry id="libutil">
848	<term><filename class="libraryfile">libutil</filename></term>
849	<listitem>
850	<para>Contains code for <quote>standard</quote> functions used in
851	many different Unix utilities</para>
852	<indexterm zone="ch-cross-tools-eglibc libutil">
853	<primary sortas="c-libutil">libutil</primary>
854	</indexterm>
855	</listitem>
856	</varlistentry>
857
858	</variablelist>
859
860	</sect2>
861
862	</sect1>

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