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author | Gerard Beekmans <gerard@linuxfromscratch.org> | 2005-02-19 22:16:42 +0000 |
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committer | Gerard Beekmans <gerard@linuxfromscratch.org> | 2005-02-19 22:16:42 +0000 |
commit | 81fd230419b0cfd052b08fc1ed352bb7d49975df (patch) | |
tree | 24c98d2876e5b457dcb88d39e7cca4905f58691a /chapter06/aboutdebug.xml | |
parent | 2f9131f8390243dbc350fe2eeb9e1d58f0264888 (diff) |
Trunk is now identical to Testing
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@4648 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
Diffstat (limited to 'chapter06/aboutdebug.xml')
-rw-r--r-- | chapter06/aboutdebug.xml | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/chapter06/aboutdebug.xml b/chapter06/aboutdebug.xml index f0ac8956f..7ef47d71c 100644 --- a/chapter06/aboutdebug.xml +++ b/chapter06/aboutdebug.xml @@ -7,6 +7,45 @@ <title>About Debugging Symbols</title> <?dbhtml filename="aboutdebug.html"?> -<para>See testing</para> +<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 +included, the debugger can provide not only memory addresses, but also +the names of the routines and variables.</para> + +<para>However, the inclusion of these debugging symbols enlarges a +program or library significantly. The following is an example of the +amount of space these symbols occupy:</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 (<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</para></listitem> + +</itemizedlist> + +<para>Sizes may vary depending on which compiler and C +library were used, but when comparing programs with and without debugging +symbols, the difference will usually be a factor between two and +five.</para> + +<para>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. Additional information on system +optimization can be found at <ulink url="&hints-root;optimization.txt"><phrase +condition="pdf">&hints-root; optimization.txt</phrase></ulink>.</para> </sect1> + |