source: BOOK/final-system/common/glibc.xml@ 7ddb05f

sysvinit
Last change on this file since 7ddb05f was c0c70554, checked in by Chris Staub <chris@…>, 9 years ago

No need to use --disable-profile on Glibc

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File size: 34.7 KB
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[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
[cbbd1e4]8<sect1 id="ch-system-glibc" role="wrap">
9 <?dbhtml filename="glibc.html"?>
[3f8be484]10
[d785e9d]11 <title>Glibc-&glibc-version;</title>
[3f8be484]12
[cbbd1e4]13 <indexterm zone="ch-system-glibc">
[d785e9d]14 <primary sortas="a-Glibc">Glibc</primary>
[3f8be484]15 </indexterm>
16
17 <sect2 role="package">
18 <title/>
19
[d785e9d]20 <para>The Glibc package contains the main C library. This library provides
[3f8be484]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">
[d785e9d]28 <title>Installation of Glibc</title>
[3f8be484]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
[d785e9d]36 implementation cannot convert from/to Unicode.</quote> Glibc provides
[3f8be484]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
[22cd957]41 <para os="l1">At the end of the installation, the build system will run
[74592cf]42 a sanity test to make sure everything installed properly. This script
43 performs its tests by attempting to compile test programs against certain
44 libraries. However it does not specify the path to
45 <filename class="libraryfile">ld.so</filename>, and our toolchain
[4d9d90c]46 is still configured to use the one in
47 <filename class="directory">/tools</filename>. The following set of
48 commands will force the script to use the complete path of the new
49 <filename class="libraryfile">ld.so</filename> that was just installed:</para>
[22cd957]50
[74592cf]51<screen os="l2"><userinput>LINKER=$(readelf -l /tools/bin/bash | sed -n 's@.*interpret.*/tools\(.*\)]$@\1@p')
[d8f87e8]52sed -i "s|libs -o|libs -L/usr/lib -Wl,-dynamic-linker=${LINKER} -o|" \
53 scripts/test-installation.pl
54unset LINKER</userinput></screen>
55
[d785e9d]56 <para os="b">The Glibc build system is self-contained and will install
[3f8be484]57 perfectly, even though the compiler specs file and linker are still
58 pointing at <filename class="directory">/tools</filename>. The specs
[d785e9d]59 and linker cannot be adjusted before the Glibc install because the
60 Glibc Autoconf tests would give false results and defeat the goal
[3f8be484]61 of achieving a clean build.</para>
62
[d785e9d]63 <para os="e">The Glibc documentation recommends building Glibc outside of the source directory in a dedicated build directory:</para>
[3f8be484]64
[cbbd1e4]65<screen os="f"><userinput>mkdir -v ../glibc-build
66cd ../glibc-build</userinput></screen>
[3f8be484]67
[d785e9d]68 <para os="g">Prepare Glibc for compilation:</para>
[3f8be484]69
[b27081c4]70<screen os="h"><userinput>../glibc-&glibc-version;/configure \
71 --prefix=/usr \
72 --enable-kernel=&glibc-kernel-version; \
73 --libexecdir=/usr/lib/glibc \
[52ed4da]74 --enable-obsolete-rpc</userinput></screen>
[3f8be484]75
76 <variablelist os="i">
77 <title>The meaning of the new configure option:</title>
78
79 <varlistentry>
[cbbd1e4]80 <term><parameter>--libexecdir=/usr/lib/glibc</parameter></term>
[3f8be484]81 <listitem>
[aabf475b]82 <para>This changes the location for hard links to the
83 <command>getconf</command> utility from their default of <filename
[3f8be484]84 class="directory">/usr/libexec</filename> to <filename
[cbbd1e4]85 class="directory">/usr/lib/glibc</filename>.</para>
[3f8be484]86 </listitem>
87 </varlistentry>
88 </variablelist>
89
90 <para os="j">Compile the package:</para>
91
92<screen os="k"><userinput>make</userinput></screen>
93
94 <important os="l">
[eb21c92]95 <para>Due to Glibc's critical role in a properly functioning system,
96 the CLFS developers strongly recommend running the testsuite.</para>
[3f8be484]97 </important>
98
[33346dd]99 <para os="m">Use the following commands to run the test suite and output
[37957f4]100 any test failures:</para>
[3f8be484]101
102<!-- items n,o,p no longer the master, use x86_64 which has no failures -->
103
[e67e858]104<screen os="n"><userinput remap="test">make check</userinput></screen>
[3f8be484]105
[d785e9d]106 <para os="o">The Glibc test suite is highly dependent on certain functions of
[767a2a5]107 the host system, in particular the kernel. The <emphasis>posix/annexc</emphasis> and
108 <emphasis>conform/run-conformtest</emphasis> tests normally fail
[10b2850]109 and you should see <literal>Error 1 (ignored)</literal> in the output. Apart
[d785e9d]110 from this, the Glibc test suite is always expected to pass. However, in certain
[10b2850]111 circumstances, some failures are unavoidable. If a test fails because of a missing
112 program (or missing symbolic link), or a segfault, you will see an error code
113 greater than 127 and the details will be in the log. More commonly, tests will
114 fail with <literal>Error 2</literal> - for these, the contents of the corresponding
115 <filename>.out</filename> file, e.g. <filename>posix/annexc.out</filename> may be
116 informative. Here is a list of the most common issues:</para>
[3f8be484]117
118 <itemizedlist os="p">
[767a2a5]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>
[3f8be484]128 <listitem>
[3514708]129 <para>The <emphasis>math</emphasis> tests sometimes fail.
130 Certain optimization settings are known to be a
131 factor here.</para>
[3f8be484]132 </listitem>
133 <listitem>
[fb40919]134 <para>If you have mounted the CLFS partition with the
[3f8be484]135 <parameter>noatime</parameter> option, the <emphasis>atime</emphasis> test
136 will fail. As mentioned in <xref linkend="ch-partitioning-mounting"/>,
137 do not use the <parameter>noatime</parameter> option while building
[fb40919]138 CLFS.</para>
[3f8be484]139 </listitem>
140 <listitem>
141 <para>When running on older and slower hardware, some tests
[767a2a5]142 can fail because of test timeouts being exceeded.
143 Modifying the make check command to set a TIMEOUTFACTOR is reported to
144 help eliminate these errors (e.g. <command>TIMEOUTFACTOR=16
145 make -k check</command>).</para>
146 </listitem>
147 <listitem>
148 <para>posix/tst-getaddrinfo4 will always fail due to not having a network
149 connection when the test is run.</para>
[3f8be484]150 </listitem>
151 </itemizedlist>
152
[d785e9d]153 <para os="q">Though it is a harmless message, the install stage of Glibc will
[3f8be484]154 complain about the absence of <filename>/etc/ld.so.conf</filename>.
155 Prevent this warning with:</para>
156
157<screen os="r"><userinput>touch /etc/ld.so.conf</userinput></screen>
158
[e57ce38]159 <para os="s">Install the package, and remove unneeded files from
160 <filename class="directory">/usr/include/rpcsvc</filename>:</para>
[3f8be484]161
[e57ce38]162<screen os="t"><userinput>make install &amp;&amp;
163rm -v /usr/include/rpcsvc/*.x</userinput></screen>
[3f8be484]164
[cf9aa7e]165 <para os="u">Install the configuration file and runtime directory for
[dff9ef7]166 <command>nscd</command>:</para>
[cf9aa7e]167
[fde0426]168<screen os="v"><userinput>cp -v ../glibc-&glibc-version;/nscd/nscd.conf /etc/nscd.conf
[cf9aa7e]169mkdir -pv /var/cache/nscd</userinput></screen>
170
[77e1959e]171 <para os="w">Install the systemd support files for <command>nscd</command>:</para>
172
[fde0426]173<screen os="x"><userinput>install -v -Dm644 ../glibc-&glibc-version;/nscd/nscd.tmpfiles /usr/lib/tmpfiles.d/nscd.conf
174install -v -Dm644 ../glibc-&glibc-version;/nscd/nscd.service /lib/systemd/system/nscd.service</userinput></screen>
[77e1959e]175
[3f8be484]176 </sect2>
177
[cbbd1e4]178 <sect2 id="i18n-glibc" role="configuration">
[3f8be484]179 <title>Internationalization</title>
180
181 <para>The locales that can make the system respond in a different
[5a321cb]182 language were not installed by the above command. Install them
[3f8be484]183 with:</para>
184
185<screen><userinput>make localedata/install-locales</userinput></screen>
186
187 <para>To save time, an alternative to running the previous command (which
[643f8be]188 generates and installs every locale listed in the
[cbbd1e4]189 <filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file) is
[e7aadbe]190 to install only those locales that are wanted and needed. This can be
191 achieved by using the <command>localedef</command> command. Information on
192 this command is located in the <filename>INSTALL</filename> file in the
[d785e9d]193 Glibc source. However, there are a number of locales that are essential in
[e7aadbe]194 order for the tests of future packages to pass, in particular, the
[3f8be484]195 <emphasis>libstdc++</emphasis> tests from GCC. The following instructions,
196 instead of the <parameter>install-locales</parameter> target used above,
197 will install the minimum set of locales necessary for the tests to run
198 successfully:</para>
199
[3a3e135]200<screen role="nodump"><userinput>mkdir -pv /usr/lib/locale
[8a10f1c]201localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
[3f8be484]202localedef -i de_DE -f ISO-8859-1 de_DE
203localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
204localedef -i en_HK -f ISO-8859-1 en_HK
205localedef -i en_PH -f ISO-8859-1 en_PH
206localedef -i en_US -f ISO-8859-1 en_US
207localedef -i es_MX -f ISO-8859-1 es_MX
208localedef -i fa_IR -f UTF-8 fa_IR
209localedef -i fr_FR -f ISO-8859-1 fr_FR
210localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
211localedef -i it_IT -f ISO-8859-1 it_IT
212localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen>
213
214 <para>Some locales installed by the <command>make
215 localedata/install-locales</command> command above are not properly
[e3a8717]216 supported by some applications that are in CLFS and CBLFS. Because
[3f8be484]217 of the various problems that arise due to application programmers making
[fb40919]218 assumptions that break in such locales, CLFS should not be used in locales
[3f8be484]219 that utilize multibyte character sets (including UTF-8) or right-to-left
220 writing order. Numerous unofficial and unstable patches are required to
[fb40919]221 fix these problems, and it has been decided by the CLFS developers not to
[643f8be]222 support such complex locales at this time. This applies to the ja_JP and
223 fa_IR locales as well&mdash;they have been installed only for GCC and
224 Gettext tests to pass, and the <command>watch</command> program (part of
[8184788]225 the Procps-ng package) does not work properly in them. Various attempts to
[643f8be]226 circumvent these restrictions are documented in internationalization-related
227 hints.</para>
[3f8be484]228
229 </sect2>
230
[cbbd1e4]231 <sect2 id="conf-glibc" role="configuration">
[d785e9d]232 <title>Configuring Glibc</title>
[3f8be484]233
[cbbd1e4]234 <indexterm zone="conf-glibc">
[3f8be484]235 <primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
236 </indexterm>
237
[cbbd1e4]238 <indexterm zone="conf-glibc">
[3f8be484]239 <primary sortas="e-/etc/localtime">/etc/localtime</primary>
240 </indexterm>
241
242 <para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
[d785e9d]243 because, although Glibc provides defaults when this file is missing or
244 corrupt, the Glibc defaults do not work well in a networked environment.
[3f8be484]245 The time zone also needs to be configured.</para>
246
247 <para>Create a new file <filename>/etc/nsswitch.conf</filename> by running
248 the following:</para>
249
250<screen><userinput>cat &gt; /etc/nsswitch.conf &lt;&lt; "EOF"
251<literal># Begin /etc/nsswitch.conf
252
253passwd: files
254group: files
255shadow: files
256
257hosts: files dns
258networks: files
259
260protocols: files
261services: files
262ethers: files
263rpc: files
264
265# End /etc/nsswitch.conf</literal>
266EOF</userinput></screen>
267
[52ed4da]268 <para>Install timezone data:</para>
269<screen><userinput>tar -xf ../tzdata&tzdata-version;.tar.gz
270
271ZONEINFO=/usr/share/zoneinfo
272mkdir -pv $ZONEINFO/{posix,right}
273
[80c037c]274for tz in etcetera southamerica northamerica europe africa antarctica \
[c493aa56]275 asia australasia backward pacificnew systemv; do
[52ed4da]276 zic -L /dev/null -d $ZONEINFO -y "sh yearistype.sh" ${tz}
277 zic -L /dev/null -d $ZONEINFO/posix -y "sh yearistype.sh" ${tz}
278 zic -L leapseconds -d $ZONEINFO/right -y "sh yearistype.sh" ${tz}
279done
280
[c493aa56]281cp -v zone.tab zone1970.tab iso3166.tab $ZONEINFO
[52ed4da]282zic -d $ZONEINFO -p America/New_York
283unset ZONEINFO</userinput></screen>
284
285 <variablelist>
286 <title>The meaning of the zic commands:</title>
287
288 <varlistentry>
289 <term><parameter>zic -L /dev/null ...</parameter></term>
290 <listitem>
291 <para>This creates posix timezones, without any leap seconds. It is
292 conventional to put these in both
293 <filename class="directory">zoneinfo</filename> and
294 <filename class="directory">zoneinfo/posix</filename>. It is
295 necessary to put the POSIX timezones in
296 <filename class="directory">zoneinfo</filename>, otherwise various
297 test-suites will report errors. On an embedded system, where space is
298 tight and you do not intend to ever update the timezones, you could save
299 1.9MB by not using the <filename class="directory">posix</filename>
300 directory, but some applications or test-suites might give less good
301 results</para>
302 </listitem>
303 </varlistentry>
304 <varlistentry>
305 <term><parameter>zic -L leapseconds ...</parameter></term>
306 <listitem>
307 <para>This creates right timezones, including leap seconds. On an
308 embedded system, where space is tight and you do not intend to
309 ever update the timezones, or care about the correct time, you could
310 save 1.9MB by omitting the <filename class="directory">right</filename>
311 directory.</para>
312 </listitem>
313 </varlistentry>
314 <varlistentry>
315 <term><parameter>zic ... -p ...</parameter></term>
316 <listitem>
317 <para>This creates the <filename>posixrules</filename> file. We use
318 New York because POSIX requires the daylight savings time rules
319 to be in accordance with US rules.</para>
320 </listitem>
321 </varlistentry>
322 </variablelist>
323
[3f8be484]324 <para>To determine the local time zone, run the following script:</para>
325
[0f3854e]326<screen role="nodump"><userinput>tzselect</userinput></screen>
[3f8be484]327
328 <para>After answering a few questions about the location, the script will
329 output the name of the time zone (e.g., <emphasis>EST5EDT</emphasis> or
330 <emphasis>Canada/Eastern</emphasis>). Then create the
331 <filename>/etc/localtime</filename> file by running:</para>
332
[63cad62f]333<screen><userinput>cp -v /usr/share/zoneinfo/<replaceable>[xxx]</replaceable> \
[3f8be484]334 /etc/localtime</userinput></screen>
335
336 <para>Replace <replaceable>[xxx]</replaceable> with the name of the time zone
337 that <command>tzselect</command> provided (e.g., Canada/Eastern).</para>
338
339 </sect2>
340
341 <sect2 id="conf-ld" role="configuration">
[0b637f1]342 <title>Configuring The Dynamic Loader</title>
[3f8be484]343
344 <indexterm zone="conf-ld">
345 <primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
346 </indexterm>
347
[3998188]348 <para os="ld-a">By default, the dynamic loader (<filename
[3f8be484]349 class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
350 <filename class="directory">/lib</filename> and <filename
351 class="directory">/usr/lib</filename> for dynamic libraries that are
352 needed by programs as they are run. However, if there are libraries in
353 directories other than <filename class="directory">/lib</filename> and
354 <filename class="directory">/usr/lib</filename>, these need to be
355 added to the <filename>/etc/ld.so.conf</filename> file in order
356 for the dynamic loader to find them. Two directories that are commonly
357 known to contain additional libraries are <filename
358 class="directory">/usr/local/lib</filename> and <filename
359 class="directory">/opt/lib</filename>, so add those directories to the
360 dynamic loader's search path.</para>
361
[3998188]362 <para os="ld-b">Create a new file <filename>/etc/ld.so.conf</filename> by running the
[3f8be484]363 following:</para>
364
[3998188]365<screen os="ld-c"><userinput>cat &gt; /etc/ld.so.conf &lt;&lt; "EOF"
[3f8be484]366<literal># Begin /etc/ld.so.conf
367
368/usr/local/lib
369/opt/lib
370
371# End /etc/ld.so.conf</literal>
372EOF</userinput></screen>
373
374 </sect2>
375
[cbbd1e4]376 <sect2 id="contents-glibc" role="content">
[d785e9d]377 <title>Contents of Glibc</title>
[3f8be484]378
379 <segmentedlist>
380 <segtitle>Installed programs</segtitle>
381 <segtitle>Installed libraries</segtitle>
[61ad0b7f]382 <segtitle>Installed directories</segtitle>
[3f8be484]383
384 <seglistitem>
385 <seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
[2b220db9]386 ldd, lddlibc4, locale, localedef, makedb, mtrace, nscd,
[6d3523f]387 pcprofiledump, pldd, rpcgen, sln, sotruss, sprof, tzselect, xtrace,
[c2102b28]388 zdump, zic</seg>
[3f8be484]389 <seg>ld.so, libBrokenLocale.[a,so], libSegFault.so, libanl.[a,so],
[aeb5c611]390 libc.[a,so], libc_nonshared.a, libcidn.[a,so], libcrypt.[a,so],
391 libdl.[a,so], libg.a, libieee.a, libm.[a,so], libmcheck.a,
392 libmemusage.so, libnsl.a, libnss_compat.so, libnss_dns.so,
[188b6b2]393 libnss_files.so, libnss_hesiod.so, libnss_nis.so, libnss_nisplus.so,
394 libpcprofile.so, libpthread.[a,so], libpthread_nonshared.a,
[c2102b28]395 libresolv.[a,so], librpcsvc.a, librt.[a,so], libthread_db.so,
[3f8be484]396 libutil.[a,so]</seg>
[61ad0b7f]397 <seg>/usr/include/arpa, /usr/include/bits, /usr/include/gnu,
398 /usr/include/net, /usr/include/netash, /usr/include/netatalk,
399 /usr/include/netax25, /usr/include/neteconet, /usr/include/netinet,
400 /usr/include/netipx, /usr/include/netiucv, /usr/include/netpacket,
401 /usr/include/netrom, /usr/include/netrose, /usr/include/nfs,
402 /usr/include/protocols, /usr/include/rpc, /usr/include/rpcsvc,
[b266943]403 /usr/include/scsi, /usr/include/sys, /usr/lib/audit, /usr/lib/gconv,
404 /usr/lib/glibc, /usr/lib/locale, /usr/share/i18n, /usr/share/zoneinfo,
405 /var/cache/ldconfig, /var/cache/nscd</seg>
[3f8be484]406 </seglistitem>
407 </segmentedlist>
408
409 <variablelist>
410 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
411 <?dbfo list-presentation="list"?>
412 <?dbhtml list-presentation="table"?>
413
414 <varlistentry id="catchsegv">
415 <term><command>catchsegv</command></term>
416 <listitem>
417 <para>Can be used to create a stack trace when a program
418 terminates with a segmentation fault</para>
[cbbd1e4]419 <indexterm zone="ch-system-glibc catchsegv">
[3f8be484]420 <primary sortas="b-catchsegv">catchsegv</primary>
421 </indexterm>
422 </listitem>
423 </varlistentry>
424
425 <varlistentry id="gencat">
426 <term><command>gencat</command></term>
427 <listitem>
428 <para>Generates message catalogues</para>
[cbbd1e4]429 <indexterm zone="ch-system-glibc gencat">
[3f8be484]430 <primary sortas="b-gencat">gencat</primary>
431 </indexterm>
432 </listitem>
433 </varlistentry>
434
435 <varlistentry id="getconf">
436 <term><command>getconf</command></term>
437 <listitem>
438 <para>Displays the system configuration values for file system specific
439 variables</para>
[cbbd1e4]440 <indexterm zone="ch-system-glibc getconf">
[3f8be484]441 <primary sortas="b-getconf">getconf</primary>
442 </indexterm>
443 </listitem>
444 </varlistentry>
445
446 <varlistentry id="getent">
447 <term><command>getent</command></term>
448 <listitem>
449 <para>Gets entries from an administrative database</para>
[cbbd1e4]450 <indexterm zone="ch-system-glibc getent">
[3f8be484]451 <primary sortas="b-getent">getent</primary>
452 </indexterm>
453 </listitem>
454 </varlistentry>
455
456 <varlistentry id="iconv">
457 <term><command>iconv</command></term>
458 <listitem>
459 <para>Performs character set conversion</para>
[cbbd1e4]460 <indexterm zone="ch-system-glibc iconv">
[3f8be484]461 <primary sortas="b-iconv">iconv</primary>
462 </indexterm>
463 </listitem>
464 </varlistentry>
465
466 <varlistentry id="iconvconfig">
467 <term><command>iconvconfig</command></term>
468 <listitem>
469 <para>Creates fastloading <command>iconv</command> module configuration
470 files</para>
[cbbd1e4]471 <indexterm zone="ch-system-glibc iconvconfig">
[3f8be484]472 <primary sortas="b-iconvconfig">iconvconfig</primary>
473 </indexterm>
474 </listitem>
475 </varlistentry>
476
477 <varlistentry id="ldconfig">
478 <term><command>ldconfig</command></term>
479 <listitem>
480 <para>Configures the dynamic linker runtime bindings</para>
[cbbd1e4]481 <indexterm zone="ch-system-glibc ldconfig">
[3f8be484]482 <primary sortas="b-ldconfig">ldconfig</primary>
483 </indexterm>
484 </listitem>
485 </varlistentry>
486
487 <varlistentry id="ldd">
488 <term><command>ldd</command></term>
489 <listitem>
490 <para>Reports which shared libraries are required
491 by each given program or shared library</para>
[cbbd1e4]492 <indexterm zone="ch-system-glibc ldd">
[3f8be484]493 <primary sortas="b-ldd">ldd</primary>
494 </indexterm>
495 </listitem>
496 </varlistentry>
497
498 <varlistentry id="lddlibc4">
499 <term><command>lddlibc4</command></term>
500 <listitem>
501 <para>Assists <command>ldd</command> with object files</para>
[cbbd1e4]502 <indexterm zone="ch-system-glibc lddlibc4">
[3f8be484]503 <primary sortas="b-lddlibc4">lddlibc4</primary>
504 </indexterm>
505 </listitem>
506 </varlistentry>
507
508 <varlistentry id="locale">
509 <term><command>locale</command></term>
510 <listitem>
511 <para>Tells the compiler to enable or disable the use of POSIX locales
512 for built-in operations</para>
[cbbd1e4]513 <indexterm zone="ch-system-glibc locale">
[3f8be484]514 <primary sortas="b-locale">locale</primary>
515 </indexterm>
516 </listitem>
517 </varlistentry>
518
519 <varlistentry id="localedef">
520 <term><command>localedef</command></term>
521 <listitem>
522 <para>Compiles locale specifications</para>
[cbbd1e4]523 <indexterm zone="ch-system-glibc localedef">
[3f8be484]524 <primary sortas="b-localedef">localedef</primary>
525 </indexterm>
526 </listitem>
527 </varlistentry>
528
[2b220db9]529 <varlistentry id="makedb">
530 <term><command>makedb</command></term>
531 <listitem>
532 <para>Creates a simple database from textual input</para>
[cbbd1e4]533 <indexterm zone="ch-system-glibc makedb">
[2b220db9]534 <primary sortas="b-makedb">makedb</primary>
535 </indexterm>
536 </listitem>
537 </varlistentry>
538
[3f8be484]539 <varlistentry id="mtrace">
540 <term><command>mtrace</command></term>
541 <listitem>
542 <para>Reads and interprets a memory trace file and
543 displays a summary in human-readable format</para>
[cbbd1e4]544 <indexterm zone="ch-system-glibc mtrace">
[3f8be484]545 <primary sortas="b-mtrace">mtrace</primary>
546 </indexterm>
547 </listitem>
548 </varlistentry>
549
550 <varlistentry id="nscd">
551 <term><command>nscd</command></term>
552 <listitem>
553 <para>A daemon that provides a cache for the most common name
554 service requests</para>
[cbbd1e4]555 <indexterm zone="ch-system-glibc nscd">
[3f8be484]556 <primary sortas="b-nscd">nscd</primary>
557 </indexterm>
558 </listitem>
559 </varlistentry>
560
561 <varlistentry id="pcprofiledump">
562 <term><command>pcprofiledump</command></term>
563 <listitem>
564 <para>Dumps information generated by PC profiling</para>
[cbbd1e4]565 <indexterm zone="ch-system-glibc pcprofiledump">
[3f8be484]566 <primary sortas="b-pcprofiledump">pcprofiledump</primary>
567 </indexterm>
568 </listitem>
569 </varlistentry>
570
[2b220db9]571 <varlistentry id="pldd">
572 <term><command>pldd</command></term>
573 <listitem>
574 <para>Lists dynamic shared objects used by running processes</para>
[cbbd1e4]575 <indexterm zone="ch-system-glibc pldd">
[2b220db9]576 <primary sortas="b-pldd">pldd</primary>
577 </indexterm>
578 </listitem>
579 </varlistentry>
580
[3f8be484]581 <varlistentry id="rpcgen">
582 <term><command>rpcgen</command></term>
583 <listitem>
584 <para>Generates C code to implement the Remote Procecure Call (RPC)
585 protocol</para>
[cbbd1e4]586 <indexterm zone="ch-system-glibc rpcgen">
[3f8be484]587 <primary sortas="b-rpcgen">rpcgen</primary>
588 </indexterm>
589 </listitem>
590 </varlistentry>
591
592 <varlistentry id="sln">
593 <term><command>sln</command></term>
594 <listitem>
[7087cbc]595 <para>A statically linked program that creates symbolic links</para>
[cbbd1e4]596 <indexterm zone="ch-system-glibc sln">
[3f8be484]597 <primary sortas="b-sln">sln</primary>
598 </indexterm>
599 </listitem>
600 </varlistentry>
601
[2b220db9]602 <varlistentry id="sotruss">
603 <term><command>sotruss</command></term>
604 <listitem>
605 <para>Traces shared library procedure calls of a specified command</para>
[cbbd1e4]606 <indexterm zone="ch-system-glibc sotruss">
[2b220db9]607 <primary sortas="b-sotruss">sotruss</primary>
608 </indexterm>
609 </listitem>
610 </varlistentry>
611
[3f8be484]612 <varlistentry id="sprof">
613 <term><command>sprof</command></term>
614 <listitem>
615 <para>Reads and displays shared object profiling data</para>
[cbbd1e4]616 <indexterm zone="ch-system-glibc sprof">
[3f8be484]617 <primary sortas="b-sprof">sprof</primary>
618 </indexterm>
619 </listitem>
620 </varlistentry>
621
622 <varlistentry id="tzselect">
623 <term><command>tzselect</command></term>
624 <listitem>
625 <para>Asks the user about the location of the
626 system and reports the corresponding time zone description</para>
[cbbd1e4]627 <indexterm zone="ch-system-glibc tzselect">
[3f8be484]628 <primary sortas="b-tzselect">tzselect</primary>
629 </indexterm>
630 </listitem>
631 </varlistentry>
632
633 <varlistentry id="xtrace">
634 <term><command>xtrace</command></term>
635 <listitem>
636 <para>Traces the execution of a program by
637 printing the currently executed function</para>
[cbbd1e4]638 <indexterm zone="ch-system-glibc xtrace">
[3f8be484]639 <primary sortas="b-xtrace">xtrace</primary>
640 </indexterm>
641 </listitem>
642 </varlistentry>
643
644 <varlistentry id="zdump">
645 <term><command>zdump</command></term>
646 <listitem>
647 <para>The time zone dumper</para>
[cbbd1e4]648 <indexterm zone="ch-system-glibc zdump">
[3f8be484]649 <primary sortas="b-zdump">zdump</primary>
650 </indexterm>
651 </listitem>
652 </varlistentry>
653
654 <varlistentry id="zic">
655 <term><command>zic</command></term>
656 <listitem>
657 <para>The time zone compiler</para>
[cbbd1e4]658 <indexterm zone="ch-system-glibc zic">
[3f8be484]659 <primary sortas="b-zic">zic</primary>
660 </indexterm>
661 </listitem>
662 </varlistentry>
663
664 <varlistentry id="ld.so">
665 <term><filename class="libraryfile">ld.so</filename></term>
666 <listitem>
667 <para>The helper program for shared library executables</para>
[cbbd1e4]668 <indexterm zone="ch-system-glibc ld.so">
[3f8be484]669 <primary sortas="c-ld.so">ld.so</primary>
670 </indexterm>
671 </listitem>
672 </varlistentry>
673
674 <varlistentry id="libBrokenLocale">
675 <term><filename class="libraryfile">libBrokenLocale</filename></term>
676 <listitem>
677 <para>Used by programs, such as Mozilla, to solve broken locales</para>
[cbbd1e4]678 <indexterm zone="ch-system-glibc libBrokenLocale">
[3f8be484]679 <primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
680 </indexterm>
681 </listitem>
682 </varlistentry>
683
684 <varlistentry id="libSegFault">
685 <term><filename class="libraryfile">libSegFault</filename></term>
686 <listitem>
687 <para>The segmentation fault signal handler</para>
[cbbd1e4]688 <indexterm zone="ch-system-glibc libSegFault">
[3f8be484]689 <primary sortas="c-libSegFault">libSegFault</primary>
690 </indexterm>
691 </listitem>
692 </varlistentry>
693
694 <varlistentry id="libanl">
695 <term><filename class="libraryfile">libanl</filename></term>
696 <listitem>
697 <para>An asynchronous name lookup library</para>
[cbbd1e4]698 <indexterm zone="ch-system-glibc libanl">
[3f8be484]699 <primary sortas="c-libanl">libanl</primary>
700 </indexterm>
701 </listitem>
702 </varlistentry>
703
704 <varlistentry id="libc">
705 <term><filename class="libraryfile">libc</filename></term>
706 <listitem>
707 <para>The main C library</para>
[cbbd1e4]708 <indexterm zone="ch-system-glibc libc">
[3f8be484]709 <primary sortas="c-libc">libc</primary>
710 </indexterm>
711 </listitem>
712 </varlistentry>
713
[188b6b2]714 <varlistentry id="libcidn">
715 <term><filename class="libraryfile">libcidn</filename></term>
716 <listitem>
[d785e9d]717 <para>Used internally by Glibc for handling internationalized domain
[188b6b2]718 names in the <function>getaddrinfo()</function> function</para>
[cbbd1e4]719 <indexterm zone="ch-system-glibc libcidn">
[188b6b2]720 <primary sortas="c-libcidn">libcidn</primary>
721 </indexterm>
722 </listitem>
723 </varlistentry>
724
[3f8be484]725 <varlistentry id="libcrypt">
726 <term><filename class="libraryfile">libcrypt</filename></term>
727 <listitem>
728 <para>The cryptography library</para>
[cbbd1e4]729 <indexterm zone="ch-system-glibc libcrypt">
[3f8be484]730 <primary sortas="c-libcrypt">libcrypt</primary>
731 </indexterm>
732 </listitem>
733 </varlistentry>
734
735 <varlistentry id="libdl">
736 <term><filename class="libraryfile">libdl</filename></term>
737 <listitem>
738 <para>The dynamic linking interface library</para>
[cbbd1e4]739 <indexterm zone="ch-system-glibc libdl">
[3f8be484]740 <primary sortas="c-libdl">libdl</primary>
741 </indexterm>
742 </listitem>
743 </varlistentry>
744
745 <varlistentry id="libg">
746 <term><filename class="libraryfile">libg</filename></term>
747 <listitem>
748 <para>A runtime library for <command>g++</command></para>
[cbbd1e4]749 <indexterm zone="ch-system-glibc libg">
[3f8be484]750 <primary sortas="c-libg">libg</primary>
751 </indexterm>
752 </listitem>
753 </varlistentry>
754
755 <varlistentry id="libieee">
756 <term><filename class="libraryfile">libieee</filename></term>
757 <listitem>
758 <para>The Institute of Electrical and Electronic Engineers (IEEE)
759 floating point library</para>
[cbbd1e4]760 <indexterm zone="ch-system-glibc libieee">
[3f8be484]761 <primary sortas="c-libieee">libieee</primary>
762 </indexterm>
763 </listitem>
764 </varlistentry>
765
766 <varlistentry id="libm">
767 <term><filename class="libraryfile">libm</filename></term>
768 <listitem>
769 <para>The mathematical library</para>
[cbbd1e4]770 <indexterm zone="ch-system-glibc libm">
[3f8be484]771 <primary sortas="c-libm">libm</primary>
772 </indexterm>
773 </listitem>
774 </varlistentry>
775
776 <varlistentry id="libmcheck">
777 <term><filename class="libraryfile">libmcheck</filename></term>
778 <listitem>
779 <para>Contains code run at boot</para>
[cbbd1e4]780 <indexterm zone="ch-system-glibc libmcheck">
[3f8be484]781 <primary sortas="c-libmcheck">libmcheck</primary>
782 </indexterm>
783 </listitem>
784 </varlistentry>
785
786 <varlistentry id="libmemusage">
787 <term><filename class="libraryfile">libmemusage</filename></term>
788 <listitem>
[d785e9d]789 <para>Used by <command>memusage</command> (included in Glibc, but
[7087cbc]790 not built in a base CLFS system as it has additional dependencies)
791 to help collect information about the memory usage of a program</para>
[cbbd1e4]792 <indexterm zone="ch-system-glibc libmemusage">
[3f8be484]793 <primary sortas="c-libmemusage">libmemusage</primary>
794 </indexterm>
795 </listitem>
796 </varlistentry>
797
798 <varlistentry id="libnsl">
799 <term><filename class="libraryfile">libnsl</filename></term>
800 <listitem>
801 <para>The network services library</para>
[cbbd1e4]802 <indexterm zone="ch-system-glibc libnsl">
[3f8be484]803 <primary sortas="c-libnsl">libnsl</primary>
804 </indexterm>
805 </listitem>
806 </varlistentry>
807
808 <varlistentry id="libnss">
809 <term><filename class="libraryfile">libnss</filename></term>
810 <listitem>
811 <para>The Name Service Switch libraries, containing functions for
812 resolving host names, user names, group names, aliases, services,
813 protocols, etc.</para>
[cbbd1e4]814 <indexterm zone="ch-system-glibc libnss">
[3f8be484]815 <primary sortas="c-libnss">libnss</primary>
816 </indexterm>
817 </listitem>
818 </varlistentry>
819
820 <varlistentry id="libpcprofile">
821 <term><filename class="libraryfile">libpcprofile</filename></term>
822 <listitem>
823 <para>Contains profiling functions used to track the amount of CPU
824 time spent in specific source code lines</para>
[cbbd1e4]825 <indexterm zone="ch-system-glibc libpcprofile">
[3f8be484]826 <primary sortas="c-libpcprofile">libpcprofile</primary>
827 </indexterm>
828 </listitem>
829 </varlistentry>
830
831 <varlistentry id="libpthread">
832 <term><filename class="libraryfile">libpthread</filename></term>
833 <listitem>
834 <para>The POSIX threads library</para>
[cbbd1e4]835 <indexterm zone="ch-system-glibc libpthread">
[3f8be484]836 <primary sortas="c-libpthread">libpthread</primary>
837 </indexterm>
838 </listitem>
839 </varlistentry>
840
841 <varlistentry id="libresolv">
842 <term><filename class="libraryfile">libresolv</filename></term>
843 <listitem>
844 <para>Contains functions for creating, sending, and interpreting
845 packets to the Internet domain name servers</para>
[cbbd1e4]846 <indexterm zone="ch-system-glibc libresolv">
[3f8be484]847 <primary sortas="c-libresolv">libresolv</primary>
848 </indexterm>
849 </listitem>
850 </varlistentry>
851
852 <varlistentry id="librpcsvc">
853 <term><filename class="libraryfile">librpcsvc</filename></term>
854 <listitem>
855 <para>Contains functions providing miscellaneous RPC services</para>
[cbbd1e4]856 <indexterm zone="ch-system-glibc librpcsvc">
[3f8be484]857 <primary sortas="c-librpcsvc">librpcsvc</primary>
858 </indexterm>
859 </listitem>
860 </varlistentry>
861
862 <varlistentry id="librt">
863 <term><filename class="libraryfile">librt</filename></term>
864 <listitem>
865 <para>Contains functions providing most of the interfaces specified by
866 the POSIX.1b Realtime Extension</para>
[cbbd1e4]867 <indexterm zone="ch-system-glibc librt">
[3f8be484]868 <primary sortas="c-librt">librt</primary>
869 </indexterm>
870 </listitem>
871 </varlistentry>
872
873 <varlistentry id="libthread_db">
874 <term><filename class="libraryfile">libthread_db</filename></term>
875 <listitem>
876 <para>Contains functions useful for
877 building debuggers for multi-threaded programs</para>
[cbbd1e4]878 <indexterm zone="ch-system-glibc libthread_db">
[3f8be484]879 <primary sortas="c-libthread_db">libthread_db</primary>
880 </indexterm>
881 </listitem>
882 </varlistentry>
883
884 <varlistentry id="libutil">
885 <term><filename class="libraryfile">libutil</filename></term>
886 <listitem>
887 <para>Contains code for <quote>standard</quote> functions used in
888 many different Unix utilities</para>
[cbbd1e4]889 <indexterm zone="ch-system-glibc libutil">
[3f8be484]890 <primary sortas="c-libutil">libutil</primary>
891 </indexterm>
892 </listitem>
893 </varlistentry>
894
895 </variablelist>
896
897 </sect2>
898
899</sect1>
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