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https://git.linuxfromscratch.org/lfs.git
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963 lines
35 KiB
XML
963 lines
35 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-system-glibc" role="wrap">
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<?dbhtml filename="glibc.html"?>
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<sect1info condition="script">
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<productname>glibc</productname>
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<productnumber>&glibc-version;</productnumber>
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<address>&glibc-url;</address>
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</sect1info>
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<title>Glibc-&glibc-version;</title>
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<indexterm zone="ch-system-glibc">
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<primary sortas="a-Glibc">Glibc</primary>
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</indexterm>
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<sect2 role="package">
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<title/>
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<para>The Glibc package contains the main C library. This library provides
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the basic routines for allocating memory, searching directories, opening and
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closing files, reading and writing files, string handling, pattern matching,
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arithmetic, and so on.</para>
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<segmentedlist>
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<segtitle>&buildtime;</segtitle>
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<segtitle>&diskspace;</segtitle>
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<seglistitem>
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<seg>&glibc-fin-sbu;</seg>
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<seg>&glibc-fin-du;</seg>
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</seglistitem>
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</segmentedlist>
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</sect2>
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<sect2 role="installation">
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<title>Installation of Glibc</title>
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<para>First, fix a security problem identified upstream:</para>
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<screen><userinput remap="pre">sed -e '/NOTIFY_REMOVED)/s/)/ \&\& data.attr != NULL)/' \
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-i sysdeps/unix/sysv/linux/mq_notify.c</userinput></screen>
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<para>Some of the Glibc programs use the non-FHS compliant
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<filename class="directory">/var/db</filename> directory to store
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their runtime data. Apply the following patch to make such programs
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store their runtime data in the FHS-compliant locations:</para>
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<screen><userinput remap="pre">patch -Np1 -i ../&glibc-fhs-patch;</userinput></screen>
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<para>The Glibc documentation recommends building Glibc
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in a dedicated build directory:</para>
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<screen><userinput remap="pre">mkdir -v build
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cd build</userinput></screen>
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<para>Ensure that the <command>ldconfig</command> and <command>sln</command>
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utilites will be installed into
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<filename class="directory">/usr/sbin</filename>:</para>
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<screen><userinput remap="pre">echo "rootsbindir=/usr/sbin" > configparms</userinput></screen>
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<para>Prepare Glibc for compilation:</para>
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<screen><userinput remap="configure">../configure --prefix=/usr \
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--disable-werror \
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--enable-kernel=&min-kernel; \
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--enable-stack-protector=strong \
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--with-headers=/usr/include \
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libc_cv_slibdir=/usr/lib</userinput></screen>
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<variablelist>
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<title>The meaning of the configure options:</title>
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<varlistentry>
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<term><parameter>--disable-werror</parameter></term>
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<listitem>
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<para>This option disables the -Werror option passed to
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GCC. This is necessary for running the test suite.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>--enable-kernel=&min-kernel;</parameter></term>
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<listitem>
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<para>This option tells the build system that this glibc may
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be used with kernels as old as &min-kernel;. This means generating
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workarounds in case a system call introduced in a later version
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cannot be used.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>--enable-stack-protector=strong</parameter></term>
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<listitem>
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<para>This option increases system security by adding
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extra code to check for buffer overflows, such as stack
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smashing attacks.</para>
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</listitem>
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</varlistentry>
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<!-- do we need this one? -->
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<varlistentry>
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<term><parameter>--with-headers=/usr/include</parameter></term>
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<listitem>
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<para>This option tells the build system where to find the
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kernel API headers.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>libc_cv_slibdir=/usr/lib</parameter></term>
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<listitem>
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<para>This variable sets the correct library for all
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systems. We do not want lib64 to be used.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>Compile the package:</para>
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<screen><userinput remap="make">make</userinput></screen>
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<important>
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<para>In this section, the test suite for Glibc is considered critical.
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Do not skip it under any circumstance.</para>
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</important>
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<para>Generally a few tests do not pass. The test failures listed below
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are usually safe to ignore.</para>
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<!-- Use remap="make" here to work around a jhalfs issue. -->
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<!--<screen><userinput remap="make">case $(uname -m) in
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i?86) ln -sfnv $PWD/elf/ld-linux.so.2 /lib ;;
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x86_64) ln -sfnv $PWD/elf/ld-linux-x86-64.so.2 /lib ;;
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esac</userinput></screen>
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<note><para>The symbolic link above is needed to run the tests at this
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stage of building in the chroot environment. It will be overwritten
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in the install phase below.</para></note>
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-->
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<screen><userinput remap="test">make check</userinput></screen>
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<para>You may see some test failures. The Glibc test suite is
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somewhat dependent on the host system. A few failures out of
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over 4200 tests can generally be ignored. This is a list of the
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most common issues seen for recent versions of LFS:</para>
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<itemizedlist>
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<listitem>
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<para><emphasis>io/tst-lchmod</emphasis>
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is known to fail in the LFS chroot environment.</para>
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</listitem>
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<listitem>
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<para><emphasis>misc/tst-ttyname</emphasis>
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is known to fail in the LFS chroot environment.</para>
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</listitem>
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<!--
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<listitem>
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<para>The <emphasis>nss/tst-nss-files-hosts-multi</emphasis>
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test may fail for reasons that have not been determined.</para>
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</listitem>
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<listitem>
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<para>The <emphasis>rt/tst-cputimer{1,2,3}</emphasis> tests depend on
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the host system kernel. Kernels 4.14.91–4.14.96,
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4.19.13–4.19.18, and 4.20.0–4.20.5 are known to
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cause these tests to fail.
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</para>
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</listitem>
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<listitem>
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<para>The math tests sometimes fail when running on
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systems where the CPU is not a relatively new Intel or
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AMD processor.</para>
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</listitem>
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-->
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</itemizedlist>
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<para>Though it is a harmless message, the install stage of Glibc will
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complain about the absence of <filename>/etc/ld.so.conf</filename>.
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Prevent this warning with:</para>
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<screen><userinput remap="install">touch /etc/ld.so.conf</userinput></screen>
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<para>Fix the generated Makefile to skip an unneeded sanity check
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that fails in the LFS partial environment:
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</para>
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<screen><userinput remap="install">sed '/test-installation/s@$(PERL)@echo not running@' -i ../Makefile</userinput></screen>
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<para>Install the package:</para>
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<screen><userinput remap="install">make install</userinput></screen>
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<para>Fix hardcoded path to the executable loader in
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<command>ldd</command> script:</para>
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<screen><userinput remap="install">sed '/RTLDLIST=/s@/usr@@g' -i /usr/bin/ldd</userinput></screen>
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<para>Install the configuration file and runtime directory for
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<command>nscd</command>:</para>
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<screen><userinput remap="install">cp -v ../nscd/nscd.conf /etc/nscd.conf
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mkdir -pv /var/cache/nscd</userinput></screen>
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<para revision="systemd">Install the systemd support files for
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<command>nscd</command>:</para>
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<screen revision="systemd"><userinput remap="install">install -v -Dm644 ../nscd/nscd.tmpfiles /usr/lib/tmpfiles.d/nscd.conf
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install -v -Dm644 ../nscd/nscd.service /usr/lib/systemd/system/nscd.service</userinput></screen>
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<para>Next, install the locales that can make the system respond in a
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different language. None of the locales are required, but if some of them
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are missing, the test suites of future packages would skip important
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testcases.</para>
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<para>Individual locales can be installed using the
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<command>localedef</command> program. E.g., the first
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<command>localedef</command> command below combines the
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<filename>/usr/share/i18n/locales/cs_CZ</filename>
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charset-independent locale definition with the
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<filename>/usr/share/i18n/charmaps/UTF-8.gz</filename>
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charmap definition and appends the result to the
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<filename>/usr/lib/locale/locale-archive</filename> file.
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The following instructions will install the minimum set of
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locales necessary for the optimal coverage of tests:</para>
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<screen role="nodump"><userinput remap="locale-test">mkdir -pv /usr/lib/locale
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localedef -i POSIX -f UTF-8 C.UTF-8 2> /dev/null || true
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localedef -i cs_CZ -f UTF-8 cs_CZ.UTF-8
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localedef -i de_DE -f ISO-8859-1 de_DE
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localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
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localedef -i de_DE -f UTF-8 de_DE.UTF-8
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localedef -i el_GR -f ISO-8859-7 el_GR
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localedef -i en_GB -f ISO-8859-1 en_GB
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localedef -i en_GB -f UTF-8 en_GB.UTF-8
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localedef -i en_HK -f ISO-8859-1 en_HK
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localedef -i en_PH -f ISO-8859-1 en_PH
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localedef -i en_US -f ISO-8859-1 en_US
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localedef -i en_US -f UTF-8 en_US.UTF-8
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localedef -i es_ES -f ISO-8859-15 es_ES@euro
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localedef -i es_MX -f ISO-8859-1 es_MX
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localedef -i fa_IR -f UTF-8 fa_IR
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localedef -i fr_FR -f ISO-8859-1 fr_FR
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localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
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localedef -i fr_FR -f UTF-8 fr_FR.UTF-8
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localedef -i is_IS -f ISO-8859-1 is_IS
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localedef -i is_IS -f UTF-8 is_IS.UTF-8
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localedef -i it_IT -f ISO-8859-1 it_IT
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localedef -i it_IT -f ISO-8859-15 it_IT@euro
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localedef -i it_IT -f UTF-8 it_IT.UTF-8
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localedef -i ja_JP -f EUC-JP ja_JP
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localedef -i ja_JP -f SHIFT_JIS ja_JP.SIJS 2> /dev/null || true
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localedef -i ja_JP -f UTF-8 ja_JP.UTF-8
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localedef -i nl_NL@euro -f ISO-8859-15 nl_NL@euro
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localedef -i ru_RU -f KOI8-R ru_RU.KOI8-R
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localedef -i ru_RU -f UTF-8 ru_RU.UTF-8
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localedef -i se_NO -f UTF-8 se_NO.UTF-8
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localedef -i ta_IN -f UTF-8 ta_IN.UTF-8
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localedef -i tr_TR -f UTF-8 tr_TR.UTF-8
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localedef -i zh_CN -f GB18030 zh_CN.GB18030
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localedef -i zh_HK -f BIG5-HKSCS zh_HK.BIG5-HKSCS
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localedef -i zh_TW -f UTF-8 zh_TW.UTF-8</userinput></screen>
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<para>In addition, install the locale for your own country, language and
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character set.</para>
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<para>Alternatively, install all locales listed in the
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<filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
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(it includes every locale listed above and many more) at once with the
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following time-consuming command:</para>
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<screen><userinput remap="locale-full">make localedata/install-locales</userinput></screen>
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<para>Then use the <command>localedef</command> command to create and
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install locales not listed in the
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<filename>glibc-&glibc-version;/localedata/SUPPORTED</filename> file
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when you need them. For instance, the following two locales are
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needed for some tests later in this chapter:</para>
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<screen role="nodump"><userinput remap="locale-full">localedef -i POSIX -f UTF-8 C.UTF-8 2> /dev/null || true
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localedef -i ja_JP -f SHIFT_JIS ja_JP.SIJS 2> /dev/null || true</userinput></screen>
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<note><para>Glibc now uses libidn2 when resolving internationalized
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domain names. This is a run time dependency. If this capability
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is needed, the instructions for installing libidn2 are in the
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<ulink url="&blfs-book;general/libidn2.html">BLFS libidn2 page</ulink>.
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</para></note>
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</sect2>
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<sect2 id="conf-glibc" role="configuration">
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<title>Configuring Glibc</title>
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<indexterm zone="conf-glibc">
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<primary sortas="e-/etc/nsswitch.conf">/etc/nsswitch.conf</primary>
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</indexterm>
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<indexterm zone="conf-glibc">
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<primary sortas="e-/etc/localtime">/etc/localtime</primary>
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</indexterm>
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<sect3>
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<title>Adding nsswitch.conf</title>
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<para>The <filename>/etc/nsswitch.conf</filename> file needs to be created
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because the Glibc defaults do not work well in a networked environment.
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</para>
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<para>Create a new file <filename>/etc/nsswitch.conf</filename> by running the
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following:</para>
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<screen><userinput>cat > /etc/nsswitch.conf << "EOF"
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<literal># Begin /etc/nsswitch.conf
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passwd: files
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group: files
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shadow: files
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hosts: files dns
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networks: files
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protocols: files
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services: files
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ethers: files
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rpc: files
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# End /etc/nsswitch.conf</literal>
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EOF</userinput></screen>
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</sect3>
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<sect3>
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<title>Adding time zone data</title>
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<para>Install and set up the time zone data with the following:</para>
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<screen><userinput>tar -xf ../../tzdata&tzdata-version;.tar.gz
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ZONEINFO=/usr/share/zoneinfo
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mkdir -pv $ZONEINFO/{posix,right}
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for tz in etcetera southamerica northamerica europe africa antarctica \
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asia australasia backward; do
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zic -L /dev/null -d $ZONEINFO ${tz}
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zic -L /dev/null -d $ZONEINFO/posix ${tz}
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zic -L leapseconds -d $ZONEINFO/right ${tz}
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done
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cp -v zone.tab zone1970.tab iso3166.tab $ZONEINFO
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zic -d $ZONEINFO -p America/New_York
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unset ZONEINFO</userinput></screen>
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<variablelist>
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<title>The meaning of the zic commands:</title>
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<varlistentry>
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<term><parameter>zic -L /dev/null ...</parameter></term>
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<listitem>
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<para>This creates posix time zones without any leap seconds. It is
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conventional to put these in both
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<filename class="directory">zoneinfo</filename> and
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<filename class="directory">zoneinfo/posix</filename>. It is
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necessary to put the POSIX time zones in
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<filename class="directory">zoneinfo</filename>, otherwise various
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test-suites will report errors. On an embedded system, where space is
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tight and you do not intend to ever update the time zones, you could save
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1.9 MB by not using the <filename class="directory">posix</filename>
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directory, but some applications or test-suites might produce some
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failures.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>zic -L leapseconds ...</parameter></term>
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<listitem>
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<para>This creates right time zones, including leap seconds. On an
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embedded system, where space is tight and you do not intend to
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ever update the time zones, or care about the correct time, you could
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save 1.9MB by omitting the <filename class="directory">right</filename>
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directory.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>zic ... -p ...</parameter></term>
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<listitem>
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<para>This creates the <filename>posixrules</filename> file. We use
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New York because POSIX requires the daylight savings time rules
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to be in accordance with US rules.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>One way to determine the local time zone is to run the following
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script:</para>
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<screen role="nodump"><userinput>tzselect</userinput></screen>
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<para>After answering a few questions about the location, the script will
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output the name of the time zone (e.g.,
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<emphasis>America/Edmonton</emphasis>). There are also some other possible
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time zones listed in <filename
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class='directory'>/usr/share/zoneinfo</filename> such as
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<emphasis>Canada/Eastern</emphasis> or <emphasis>EST5EDT</emphasis> that
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are not identified by the script but can be used.</para>
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<para>Then create the <filename>/etc/localtime</filename> file by
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running:</para>
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<screen><userinput>ln -sfv /usr/share/zoneinfo/<replaceable><xxx></replaceable> /etc/localtime</userinput></screen>
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<para>Replace <replaceable><xxx></replaceable> with the name of the
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time zone selected (e.g., Canada/Eastern).</para>
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</sect3>
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|
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<sect3 id="conf-ld" role="configuration">
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<title>Configuring the Dynamic Loader</title>
|
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|
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<indexterm zone="conf-ld">
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<primary sortas="e-/etc/ld.so.conf">/etc/ld.so.conf</primary>
|
|
</indexterm>
|
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|
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<para>By default, the dynamic loader (<filename
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class="libraryfile">/lib/ld-linux.so.2</filename>) searches through
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<filename class="directory">/lib</filename> and <filename
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class="directory">/usr/lib</filename> for dynamic libraries that are
|
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needed by programs as they are run. However, if there are libraries in
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directories other than <filename class="directory">/lib</filename> and
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<filename class="directory">/usr/lib</filename>, these need to be added
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to the <filename>/etc/ld.so.conf</filename> file in order for the
|
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dynamic loader to find them. Two directories that are commonly known
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to contain additional libraries are <filename
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class="directory">/usr/local/lib</filename> and <filename
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class="directory">/opt/lib</filename>, so add those directories to the
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dynamic loader's search path.</para>
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|
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<para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
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following:</para>
|
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|
|
<screen><userinput>cat > /etc/ld.so.conf << "EOF"
|
|
<literal># Begin /etc/ld.so.conf
|
|
/usr/local/lib
|
|
/opt/lib
|
|
</literal>
|
|
EOF</userinput></screen>
|
|
|
|
<para>If desired, the dynamic loader can also search a directory and
|
|
include the contents of files found there. Generally the files in
|
|
this include directory are one line specifying the desired library path.
|
|
To add this capability run the following commands:</para>
|
|
|
|
<screen role="nodump"><userinput>cat >> /etc/ld.so.conf << "EOF"
|
|
<literal># Add an include directory
|
|
include /etc/ld.so.conf.d/*.conf
|
|
</literal>
|
|
EOF
|
|
mkdir -pv /etc/ld.so.conf.d</userinput></screen>
|
|
|
|
</sect3>
|
|
</sect2>
|
|
|
|
<sect2 id="contents-glibc" role="content">
|
|
<title>Contents of Glibc</title>
|
|
|
|
<segmentedlist>
|
|
<segtitle>Installed programs</segtitle>
|
|
<segtitle>Installed libraries</segtitle>
|
|
<segtitle>Installed directories</segtitle>
|
|
|
|
<seglistitem>
|
|
<seg>catchsegv, gencat, getconf, getent, iconv, iconvconfig, ldconfig,
|
|
ldd, lddlibc4, locale, localedef, makedb, mtrace, nscd,
|
|
pcprofiledump, pldd, sln, sotruss, sprof, tzselect, xtrace,
|
|
zdump, and zic</seg>
|
|
<seg>ld-linux-x86-64.so.2, ld-linux.so.2,
|
|
libBrokenLocale.{a,so}, libSegFault.so, libanl.{a,so},
|
|
libc.{a,so}, libc_nonshared.a,
|
|
libcrypt.{a,so}, libdl.{a,so.2}, libg.a, libm.{a,so},
|
|
libmcheck.a, libmemusage.so, libmvec.{a,so}, libnsl.so.1,
|
|
libnss_compat.so, libnss_dns.so, libnss_files.so, libnss_hesiod.so,
|
|
libpcprofile.so, libpthread.{a,so.0},
|
|
libresolv.{a,so}, librt.{a,so.1},
|
|
libthread_db.so, and libutil.{a,so.1}</seg>
|
|
<seg>/usr/include/arpa, /usr/include/bits, /usr/include/gnu,
|
|
/usr/include/net, /usr/include/netash, /usr/include/netatalk,
|
|
/usr/include/netax25, /usr/include/neteconet, /usr/include/netinet,
|
|
/usr/include/netipx, /usr/include/netiucv, /usr/include/netpacket,
|
|
/usr/include/netrom, /usr/include/netrose, /usr/include/nfs,
|
|
/usr/include/protocols, /usr/include/rpc,
|
|
/usr/include/sys, /usr/lib/audit, /usr/lib/gconv, /usr/lib/locale,
|
|
/usr/libexec/getconf, /usr/share/i18n, /usr/share/zoneinfo,
|
|
/var/cache/nscd, and /var/lib/nss_db</seg>
|
|
</seglistitem>
|
|
</segmentedlist>
|
|
|
|
<variablelist>
|
|
<bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
|
<?dbfo list-presentation="list"?>
|
|
<?dbhtml list-presentation="table"?>
|
|
|
|
<varlistentry id="catchsegv">
|
|
<term><command>catchsegv</command></term>
|
|
<listitem>
|
|
<para>Can be used to create a stack trace when a program
|
|
terminates with a segmentation fault</para>
|
|
<indexterm zone="ch-system-glibc catchsegv">
|
|
<primary sortas="b-catchsegv">catchsegv</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="gencat">
|
|
<term><command>gencat</command></term>
|
|
<listitem>
|
|
<para>Generates message catalogues</para>
|
|
<indexterm zone="ch-system-glibc gencat">
|
|
<primary sortas="b-gencat">gencat</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="getconf">
|
|
<term><command>getconf</command></term>
|
|
<listitem>
|
|
<para>Displays the system configuration values for file system
|
|
specific variables</para>
|
|
<indexterm zone="ch-system-glibc getconf">
|
|
<primary sortas="b-getconf">getconf</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="getent">
|
|
<term><command>getent</command></term>
|
|
<listitem>
|
|
<para>Gets entries from an administrative database</para>
|
|
<indexterm zone="ch-system-glibc getent">
|
|
<primary sortas="b-getent">getent</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="iconv">
|
|
<term><command>iconv</command></term>
|
|
<listitem>
|
|
<para>Performs character set conversion</para>
|
|
<indexterm zone="ch-system-glibc iconv">
|
|
<primary sortas="b-iconv">iconv</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="iconvconfig">
|
|
<term><command>iconvconfig</command></term>
|
|
<listitem>
|
|
<para>Creates fastloading <command>iconv</command> module configuration
|
|
files</para>
|
|
<indexterm zone="ch-system-glibc iconvconfig">
|
|
<primary sortas="b-iconvconfig">iconvconfig</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ldconfig">
|
|
<term><command>ldconfig</command></term>
|
|
<listitem>
|
|
<para>Configures the dynamic linker runtime bindings</para>
|
|
<indexterm zone="ch-system-glibc ldconfig">
|
|
<primary sortas="b-ldconfig">ldconfig</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ldd">
|
|
<term><command>ldd</command></term>
|
|
<listitem>
|
|
<para>Reports which shared libraries are required
|
|
by each given program or shared library</para>
|
|
<indexterm zone="ch-system-glibc ldd">
|
|
<primary sortas="b-ldd">ldd</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="lddlibc4">
|
|
<term><command>lddlibc4</command></term>
|
|
<listitem>
|
|
<para>Assists <command>ldd</command> with object files</para>
|
|
<indexterm zone="ch-system-glibc lddlibc4">
|
|
<primary sortas="b-lddlibc4">lddlibc4</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="locale">
|
|
<term><command>locale</command></term>
|
|
<listitem>
|
|
<para>Prints various information about the current locale</para>
|
|
<indexterm zone="ch-system-glibc locale">
|
|
<primary sortas="b-locale">locale</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="localedef">
|
|
<term><command>localedef</command></term>
|
|
<listitem>
|
|
<para>Compiles locale specifications</para>
|
|
<indexterm zone="ch-system-glibc localedef">
|
|
<primary sortas="b-localedef">localedef</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="makedb">
|
|
<term><command>makedb</command></term>
|
|
<listitem>
|
|
<para>Creates a simple database from textual input</para>
|
|
<indexterm zone="ch-system-glibc makedb">
|
|
<primary sortas="b-makedb">makedb</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="mtrace">
|
|
<term><command>mtrace</command></term>
|
|
<listitem>
|
|
<para>Reads and interprets a memory trace file and displays a summary
|
|
in human-readable format</para>
|
|
<indexterm zone="ch-system-glibc mtrace">
|
|
<primary sortas="b-mtrace">mtrace</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="nscd">
|
|
<term><command>nscd</command></term>
|
|
<listitem>
|
|
<para>A daemon that provides a cache for the most common name
|
|
service requests</para>
|
|
<indexterm zone="ch-system-glibc nscd">
|
|
<primary sortas="b-nscd">nscd</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="pcprofiledump">
|
|
<term><command>pcprofiledump</command></term>
|
|
<listitem>
|
|
<para>Dump information generated by PC profiling</para>
|
|
<indexterm zone="ch-system-glibc pcprofiledump">
|
|
<primary sortas="b-pcprofiledump">pcprofiledump</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="pldd">
|
|
<term><command>pldd</command></term>
|
|
<listitem>
|
|
<para>Lists dynamic shared objects used by running processes</para>
|
|
<indexterm zone="ch-system-glibc pldd">
|
|
<primary sortas="b-pldd">pldd</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="sln">
|
|
<term><command>sln</command></term>
|
|
<listitem>
|
|
<para>A statically linked <command>ln</command> program</para>
|
|
<indexterm zone="ch-system-glibc sln">
|
|
<primary sortas="b-sln">sln</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="sotruss">
|
|
<term><command>sotruss</command></term>
|
|
<listitem>
|
|
<para>Traces shared library procedure calls of a specified command</para>
|
|
<indexterm zone="ch-system-glibc sotruss">
|
|
<primary sortas="b-sotruss">sotruss</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="sprof">
|
|
<term><command>sprof</command></term>
|
|
<listitem>
|
|
<para>Reads and displays shared object profiling data</para>
|
|
<indexterm zone="ch-system-glibc sprof">
|
|
<primary sortas="b-sprof">sprof</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="tzselect">
|
|
<term><command>tzselect</command></term>
|
|
<listitem>
|
|
<para>Asks the user about the location of the system and reports
|
|
the corresponding time zone description</para>
|
|
<indexterm zone="ch-system-glibc tzselect">
|
|
<primary sortas="b-tzselect">tzselect</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="xtrace">
|
|
<term><command>xtrace</command></term>
|
|
<listitem>
|
|
<para>Traces the execution of a program by printing the currently
|
|
executed function</para>
|
|
<indexterm zone="ch-system-glibc xtrace">
|
|
<primary sortas="b-xtrace">xtrace</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="zdump">
|
|
<term><command>zdump</command></term>
|
|
<listitem>
|
|
<para>The time zone dumper</para>
|
|
<indexterm zone="ch-system-glibc zdump">
|
|
<primary sortas="b-zdump">zdump</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="zic">
|
|
<term><command>zic</command></term>
|
|
<listitem>
|
|
<para>The time zone compiler</para>
|
|
<indexterm zone="ch-system-glibc zic">
|
|
<primary sortas="b-zic">zic</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ld.so">
|
|
<term><filename class="libraryfile">ld-*.so</filename></term>
|
|
<listitem>
|
|
<para>The helper program for shared library executables</para>
|
|
<indexterm zone="ch-system-glibc ld.so">
|
|
<primary sortas="c-ld.so">ld-&glibc-version;.so</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libBrokenLocale">
|
|
<term><filename class="libraryfile">libBrokenLocale</filename></term>
|
|
<listitem>
|
|
<para>Used internally by Glibc as a gross hack to get broken programs
|
|
(e.g., some Motif applications) running. See comments in
|
|
<filename>glibc-&glibc-version;/locale/broken_cur_max.c</filename>
|
|
for more information</para>
|
|
<indexterm zone="ch-system-glibc libBrokenLocale">
|
|
<primary sortas="c-libBrokenLocale">libBrokenLocale</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libSegFault">
|
|
<term><filename class="libraryfile">libSegFault</filename></term>
|
|
<listitem>
|
|
<para>The segmentation fault signal handler, used by
|
|
<command>catchsegv</command></para>
|
|
<indexterm zone="ch-system-glibc libSegFault">
|
|
<primary sortas="c-libSegFault">libSegFault</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libanl">
|
|
<term><filename class="libraryfile">libanl</filename></term>
|
|
<listitem>
|
|
<para>An asynchronous name lookup library</para>
|
|
<indexterm zone="ch-system-glibc libanl">
|
|
<primary sortas="c-libanl">libanl</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libc">
|
|
<term><filename class="libraryfile">libc</filename></term>
|
|
<listitem>
|
|
<para>The main C library</para>
|
|
<indexterm zone="ch-system-glibc libc">
|
|
<primary sortas="c-libc">libc</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libcrypt">
|
|
<term><filename class="libraryfile">libcrypt</filename></term>
|
|
<listitem>
|
|
<para>The cryptography library</para>
|
|
<indexterm zone="ch-system-glibc libcrypt">
|
|
<primary sortas="c-libcrypt">libcrypt</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libdl">
|
|
<term><filename class="libraryfile">libdl</filename></term>
|
|
<listitem>
|
|
<para>Dummy library containing no functions. Previously was the
|
|
dynamic linking interface library, whose functions are now in
|
|
<filename class="libraryfile">libc</filename></para>
|
|
<indexterm zone="ch-system-glibc libdl">
|
|
<primary sortas="c-libdl">libdl</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libg">
|
|
<term><filename class="libraryfile">libg</filename></term>
|
|
<listitem>
|
|
<para>Dummy library containing no functions. Previously was a runtime
|
|
library for <command>g++</command></para>
|
|
<indexterm zone="ch-system-glibc libg">
|
|
<primary sortas="c-libg">libg</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libm">
|
|
<term><filename class="libraryfile">libm</filename></term>
|
|
<listitem>
|
|
<para>The mathematical library</para>
|
|
<indexterm zone="ch-system-glibc libm">
|
|
<primary sortas="c-libm">libm</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libmcheck">
|
|
<term><filename class="libraryfile">libmcheck</filename></term>
|
|
<listitem>
|
|
<para>Turns on memory allocation checking when linked to</para>
|
|
<indexterm zone="ch-system-glibc libmcheck">
|
|
<primary sortas="c-libmcheck">libmcheck</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libmemusage">
|
|
<term><filename class="libraryfile">libmemusage</filename></term>
|
|
<listitem>
|
|
<para>Used by <command>memusage</command> to help collect
|
|
information about the memory usage of a program</para>
|
|
<indexterm zone="ch-system-glibc libmemusage">
|
|
<primary sortas="c-libmemusage">libmemusage</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libnsl">
|
|
<term><filename class="libraryfile">libnsl</filename></term>
|
|
<listitem>
|
|
<para>The network services library, now deprecated</para>
|
|
<indexterm zone="ch-system-glibc libnsl">
|
|
<primary sortas="c-libnsl">libnsl</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libnss">
|
|
<term><filename class="libraryfile">libnss</filename></term>
|
|
<listitem>
|
|
<para>The Name Service Switch libraries, containing functions for
|
|
resolving host names, user names, group names, aliases, services,
|
|
protocols, etc.</para>
|
|
<indexterm zone="ch-system-glibc libnss">
|
|
<primary sortas="c-libnss">libnss</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libpcprofile">
|
|
<term><filename class="libraryfile">libpcprofile</filename></term>
|
|
<listitem>
|
|
<para>Can be preloaded to PC profile an executable</para>
|
|
<indexterm zone="ch-system-glibc libpcprofile">
|
|
<primary sortas="c-libpcprofile">libpcprofile</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libpthread">
|
|
<term><filename class="libraryfile">libpthread</filename></term>
|
|
<listitem>
|
|
<para>Dummy library containing no functions. Previously contained
|
|
functions providing most of the interfaces specified
|
|
by the POSIX.1b Realtime Extension, now the functions are in
|
|
<filename class="libraryfile">libc</filename></para>
|
|
<indexterm zone="ch-system-glibc libpthread">
|
|
<primary sortas="c-libpthread">libpthread</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libresolv">
|
|
<term><filename class="libraryfile">libresolv</filename></term>
|
|
<listitem>
|
|
<para>Contains functions for creating, sending, and interpreting
|
|
packets to the Internet domain name servers</para>
|
|
<indexterm zone="ch-system-glibc libresolv">
|
|
<primary sortas="c-libresolv">libresolv</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="librt">
|
|
<term><filename class="libraryfile">librt</filename></term>
|
|
<listitem>
|
|
<para>Contains functions providing most of the interfaces specified
|
|
by the POSIX.1b Realtime Extension</para>
|
|
<indexterm zone="ch-system-glibc librt">
|
|
<primary sortas="c-librt">librt</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libthread_db">
|
|
<term><filename class="libraryfile">libthread_db</filename></term>
|
|
<listitem>
|
|
<para>Contains functions useful for building debuggers for
|
|
multi-threaded programs</para>
|
|
<indexterm zone="ch-system-glibc libthread_db">
|
|
<primary sortas="c-libthread_db">libthread_db</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="libutil">
|
|
<term><filename class="libraryfile">libutil</filename></term>
|
|
<listitem>
|
|
<para>Dummy library containing no functions. Previously contained
|
|
code for <quote>standard</quote> functions used in
|
|
many different Unix utilities. These functions are now in
|
|
<filename class="libraryfile">libc</filename></para>
|
|
<indexterm zone="ch-system-glibc libutil">
|
|
<primary sortas="c-libutil">libutil</primary>
|
|
</indexterm>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
</sect2>
|
|
|
|
</sect1>
|