[Scons-users] Changing working directory

[Pawel Tomulik]

What is actually preferred method for changing working directory by
tools when using external programs? Some of the tools I've seen use
construction such as 'cd $TARGET.dir && dosomething $TARGET -o $SOURCE'.
Is there some reason for this? Is this portable, or maybe it is better
to use chdir keyword parameter of SCons.Builder.Builder?

Regards?
-- 
Paweł Tomulik