mirror of
https://git.linuxfromscratch.org/lfs.git
synced 2025-01-18 04:57:38 +00:00
52 lines
1.9 KiB
XML
52 lines
1.9 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
|
|
<!ENTITY % general-entities SYSTEM "../general.ent">
|
|
%general-entities;
|
|
]>
|
|
|
|
<sect1 id="ch-system-aboutdebug">
|
|
<?dbhtml filename="aboutdebug.html"?>
|
|
|
|
<title>About Debugging Symbols</title>
|
|
|
|
<para>Most programs and libraries are, by default, compiled with
|
|
debugging symbols included (with <command>gcc</command>'s
|
|
<parameter>-g</parameter> option). This means that when debugging a
|
|
program or library that was compiled with debugging information,
|
|
the debugger can provide not only memory addresses, but also
|
|
the names of the routines and variables.</para>
|
|
|
|
<para>The inclusion of these debugging symbols enlarges a
|
|
program or library significantly. Here are two examples of the
|
|
amount of space these symbols occupy:</para>
|
|
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>A <command>bash</command> binary with debugging symbols:
|
|
1200 KB</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>A <command>bash</command> binary without debugging symbols:
|
|
480 KB (60% smaller)</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Glibc and GCC files (<filename class="directory">/lib</filename>
|
|
and <filename class="directory">/usr/lib</filename>) with debugging
|
|
symbols: 87 MB</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Glibc and GCC files without debugging symbols: 16 MB (82% smaller)</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<para>Sizes will vary depending on which compiler and C library were used,
|
|
but a program that has been stripped of debugging symbols is usually some
|
|
50% to 80% smaller than its unstripped counterpart.
|
|
Because most users will never use a debugger on their system software,
|
|
a lot of disk space can be regained by removing these symbols. The next
|
|
section shows how to strip all debugging symbols from the programs and
|
|
libraries.</para>
|
|
|
|
</sect1>
|