mirror of https://github.com/tLDP/LDP
53 lines
2.0 KiB
XML
53 lines
2.0 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-aboutdebug">
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<?dbhtml filename="aboutdebug.html"?>
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<title>About Debugging Symbols</title>
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<para>Most programs and libraries are, by default, compiled with
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debugging symbols included (with <command>gcc</command>'s
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<parameter>-g</parameter> option). This means that when debugging a
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program or library that was compiled with debugging information
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included, the debugger can provide not only memory addresses, but also
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the names of the routines and variables.</para>
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<para>However, the inclusion of these debugging symbols enlarges a
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program or library significantly. The following is an example of the
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amount of space these symbols occupy:</para>
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<itemizedlist>
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<listitem>
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<para>A <command>bash</command> binary with debugging symbols:
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1200 KB</para>
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</listitem>
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<listitem>
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<para>A <command>bash</command> binary without debugging symbols:
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480 KB</para>
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</listitem>
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<listitem>
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<para>Glibc and GCC files (<filename class="directory">/lib</filename>
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and <filename class="directory">/usr/lib</filename>) with debugging
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symbols: 87 MB</para>
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</listitem>
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<listitem>
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<para>Glibc and GCC files without debugging symbols: 16 MB</para>
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</listitem>
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</itemizedlist>
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<para>Sizes may vary depending on which compiler and C library were used,
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but when comparing programs with and without debugging symbols, the
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difference will usually be a factor between two and five.</para>
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<para>Because most users will never use a debugger on their system software,
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a lot of disk space can be regained by removing these symbols. The next
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section shows how to strip all debugging symbols from the programs and
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libraries.</para>
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</sect1>
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