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| author | Matthew Burgess <matthew@linuxfromscratch.org> | 2004-05-03 10:59:46 +0000 |
|---|---|---|
| committer | Matthew Burgess <matthew@linuxfromscratch.org> | 2004-05-03 10:59:46 +0000 |
| commit | 673b0d84ba9591e07c0bdf0ee49d92eba10f502c (patch) | |
| tree | 129e27a1450727b440da4378e0117a468eb9c25e /chapter06/aboutdebug.xml | |
| parent | 287ea55da70ceb1f0990554b7db921d525fef816 (diff) | |
* Merged newxml into HEAD
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3435 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
Diffstat (limited to 'chapter06/aboutdebug.xml')
| -rw-r--r-- | chapter06/aboutdebug.xml | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/chapter06/aboutdebug.xml b/chapter06/aboutdebug.xml new file mode 100644 index 000000000..32798c78b --- /dev/null +++ b/chapter06/aboutdebug.xml @@ -0,0 +1,46 @@ +<?xml version="1.0" encoding="ISO-8859-1"?> +<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [ + <!ENTITY % general-entities SYSTEM "../general.ent"> + %general-entities; +]> +<sect1 id="ch-system-aboutdebug"> +<title>About debugging symbols</title> +<?dbhtml filename="aboutdebug.html"?> + +<para>Most programs and libraries are, by default, compiled with debugging +symbols included (with <command>gcc</command>'s <emphasis>-g</emphasis> +option). This means that, when debugging a program or library that was compiled +with debugging information included, the debugger can give you not only memory +addresses but also the names of the routines and variables.</para> + +<para>The inclusion of these debugging symbols, however, enlarges a program or +library significantly. To get an idea of the amount of space these symbols +occupy, have a look at the following:</para> + +<itemizedlist> + +<listitem><para>a bash binary +with debugging symbols: 1200 KB</para></listitem> + +<listitem><para>a bash binary +without debugging symbols: 480 KB</para></listitem> + +<listitem><para>Glibc and GCC files (/lib and /usr/lib) +with debugging symbols: 87 MB</para></listitem> + +<listitem><para>Glibc and GCC files +without debugging symbols: 16 MB</para></listitem> + +</itemizedlist> + +<para>Sizes may vary somewhat, depending on which compiler was used and which C +library, but when comparing programs with and without debugging symbols the +difference will generally be a factor between 2 and 5.</para> + +<para>As most people will probably never use a debugger on their system +software, a lot of disk space can be regained by removing these symbols. For +your convenience, the next section shows how to strip all debugging symbols +from all programs and libraries. Information on other ways of optimizing your +system can be found in the hint at <ulink url="&hints-root;optimization.txt"/>.</para> + +</sect1> |