default is 256, or the value of the environment variable
HISTSIZE.
-history write on/off: If this value is set to ON, the history file will
+history save on/off: If this value is set to ON, the history file will
be saved after exiting gdb. If set to OFF, the
file will not be saved. The default is OFF.
print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF.
+write on/off: GDB can now write to executable and core files (e.g. patch
+ a variable's value) if you turn this switch on, specify
+ the file ("exec foo" or "core foo"), then modify it, e.g.
+ by assigning a new value to a variable.
* Support for Epoch Environment.