add directory selection to the "compile" command

["lucatrv" <lucatrv@hotmail.com>]

Hi, sometimes I work on projects with many subfolders, so every time I issue 
the "compile" command whether I first have to change to the main folder 
(where the makefile is) or I have to manually change the commmand depending 
on the present buffer folder (such as "cd ../../.. && make -k") .
I think it would be very helpfull to add to the "compile" command the 
possibility to specify the directory where the command should be executed. 
The directory should be stored for successive times.
So for instance, the first time someone issues the "compile" command, the 
default directory could be the present directory, while the default command 
could be "make -k". Then, if for instance the user sets another directory 
(such as "/home/user/projectmaindir") and another command (such as "make"), 
then those should be set for successive "compile" command issues.

Please let me know your opinion about this. Unfortunatelly, although I tried 
to obtain something like this, my knowledge of elisp is not good enough to 
implement this.

Luca