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Instructions on how to use the debugging libraries in a debug session.
In this directory (/usr/lib/debug) are included shared libraries
compiled with debugging symbols, and installed by -dbg binary packages.
These packages installs also the sources used to compile this library
into a directory under /usr/src . Instructions for gdb are embedded in
the shared library, so gdb can automatically list the source code.
To use these libraries:
set this environment variable:
LD_LIBRARY_PATH=/usr/lib/debug; export LD_LIBRARY_PATH
and run gdb <program>
or directly
LD_LIBRARY_PATH=/usr/lib/debug gdb <program>
You don't need to recompile or link your program to debug the library
(anyway you probably have to recompile it if you want to debug it).
Pay attention that gdb ignores the value of that variable when the
program is setuid or setgid. In that case, you have to be root to have
dbg load the library.
These debug shared libraries aren't by itself slower that the stripped
version, but they have been compiled using -DDEBUG, which might activate
printing of debugging values, so don't use these libraries in a
production environment, neither set the LD_LIBRARY_PATH variable in a
global profile nor add /usr/lib/debug to /etc/ld.so.conf nor run
ldconfig with this path.
Otherways _all_ users will use the debugging libraries by default, as
well as the system.
It is a good idea to leave the -dbg binary installed only for the strict
time you need it. Don't install all the -dbg libraries unless you want
exactly debug all them together. Use dpkg -r to remove them when you
have done with your debugging session. It also occupy less diskspace if
you leave them in .deb format (compressed), and even better when you
have them handy on a CD :-)
[This file (README.debug) Fri, 26 Dec 1997 01:06:14 +0200
(c) 1997 by Fabrizio Polacco <fpolacco@debian.org>
Use it under the GPL (see /usr/share/common-licenses/GPL)]
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