GDB can't read core

["Stephen A. Witt" <sawitt@electra.rsc.raytheon.com>]

I'm working on an IXP425-based system (actually right now the IXDP-425
board from Intel) and have built a cross-toolchain using Dan Kegel's
crosstool script. I've added a "cross" gdb (gdb-6.0) built to execute on
an i386 but with the target set to arm-unknown-linux-gnu. I'm trying to
get this gdb to look at a core file generated on my target board whan an
app segfaulted. I transferred the core file back to my development machine
and run gdb and tried to get it to read the core file. The following is
the error I get:

$ arm-unknown-linux-gnu-gdb -c ./core
GNU gdb 6.0
Copyright 2003 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 "--host=i686-pc-linux-gnu
--target=arm-unknown-linux-gnu".
GDB can't read core files on this machine.
(gdb)


I've searched around and found some references to this problem, but never
did see a definitive answer (at least that I could understand). So, should
it be possible to debug core files in this way? Any tips on how to
proceed?

Thanks...