How to tell GDB to show fullpath of the source file for the stack trace when 'where' command is used

[Wung Seto]

Hi,

Gdb -f option seems only show the fullpath of the source file for a single 
frame, but it doesn't show the full path for all the stacks when 'where' and 
'bt' command is used. How to enable gdb to show the full path of the source 
file for all the stacks when 'where' or 'bt' command is used?

-Seto