[Buildroot] Do I need to install twice?

[Lloyd Sargent]

Okay, I'm really, close to finishing the wxWidgets make and  
configuration files.

HOWEVER, I'm a little stumped. If I do the following:

	$(MAKE) DESTDIR=$(TARGET_DIR) -C $(WXWIDGETS_DIR) install

The include directory is deleted so I am unable to build files for  
WxWidgets. But my libraries are in the right place.

To have include files I can build against I added this line:

	$(MAKE) DESTDIR=$(STAGING_DIR) -C $(WXWIDGETS_DIR) install

It gets me the include files but I've this bad feeling that it isn't  
the right way to do it.

So have I got this right? Or have I just made a blunder?

Cheers,

Lloyd