Re: gdb and LD_LIBRARY_PATH

["Kris Warkentin" <kewarken at qnx dot com>]

Look at the gdb commands 'set solib-search-path' and 'set
solib-absolute-prefix' and consider putting them into your .gdbinit.  Wisdom
and enlightenment should arrive.  Hilarity should ensue.  More news at
eleven.

cheers,

Kris

ps. GDB's mechanism for using LD_LIBRARY_PATH is not entirely intuitive but
it's most likely just that it always finds your library first based on
information provided by ldd.  Don't rely on LD_LIBRARY_PATH for gdb.

> I apologize in advance if this question does not
> belong here or has been answered before.
>
> I am having trouble getting gdb to pick up libraries
> from locations specified in LD_LIBRARY_PATH (LLP). The
>
> environment is: bash 2.05a, gdb 5.2.1, Linux PowerPC
> 2.4.18, gcc 3.2.1.
>
> In this case, the same library is available on the
> system in two different locations - the one in /lib is
> stripped, the one in /tmp/jeff is unstripped. I would
> like to examine a core file using the unstripped
> library in /tmp/jeff. I changed .profile, and then
> /etc/profile to prefix /tmp/jeff to LD_LIBRARY_PATH
> but to no avail. ld.so and ldd  point to the library
> in /tmp/jeff; when gdb itself is exec'd, it looks for
> libraries in /tmp/jeff before /lib (as shown by
> strace). But when gdb loads the executable and core
> file, it always picks up the library from /lib. I ran
> ldconfig to put /tmp/jeff ahead of /lib, still no
> effect. Logging in and out doesn't do it either.
>
> I used to be able to change LLP in .profile and point
> to the new locations, but I can't anymore. What am I
> doing wrong?
>
> bash/gdb/Linux info pasted below.
>
> bermuda:/tmp/jeff-3> gdb -v
> GNU gdb 5.2.1
> Copyright 2002 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General
> Public License, and you are
> welcome to change it and/or distribute copies of it
> under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show
> warranty" for details.
> This GDB was configured as "powerpc-hardhat-linux".
> bermuda:/tmp/jeff-4> uname -a
> Linux S0C17 2.4.18 #1 SMP Thu Jun 26 22:33:47 CDT 2003
> ppc unknown
> bermuda:/tmp/jeff-5> bash -version
> GNU bash, version 2.05a.0(1)-release
> (powerpc-hardhat-linux-gnu)
> Copyright 2001 Free Software Foundation, Inc.
>
> Any pointers are greatly appreciated.
>
> Thanks,
> Sriram
>
>
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