#gdb -x gdbcommands /usr/bin/mythfrontend

# cat gdbcommands
handle SIGPIPE nostop noprint
handle SIG33 nostop noprint
set logging on
set pagination off
set args -l mythgdb.log -v all
run
thread apply all bt full
set logging off

# cat gdb.txt

Program received signal SIGSEGV, Segmentation fault.
0x0807e764 in QShared::deref (this=0x73002f) at /usr/qt/3/include/qshared.h:50
50          bool deref()        { return !--count; }