[oe] Why Not Remove Src after Install

[杨同峰]

Hello EveryOne : 
           when I use OE to build OpenMoko , I found my disk has not
enough space .and the project has cost 13 G . 
   we know that when finish of do_fetch ,the source will unpack to tmp
dir .  My question is why not remove the dir 
   which uppack create to save usr's disk space ? 

          Another question is that where the file install to  ,and how
can i set it ? 
           If i want to remove source files after install ,how can i do
it ?

           Thank you ! 

Tongfeng.Yang 
2007-8-27