emerge出现要[UD]的包，如何判断是由谁的依赖关系引起的？

galaxy001

# emerge -Dv world
[ebuild     UD] sys-apps/parted-1.8.6 [1.8.8] USE="nls readline -debug -device-mapper (-selinux)" 0 kB
[ebuild     UD] dev-perl/Heap-0.71 [0.80] 0 kB

zhllg

加上-t参数

galaxy001

1. 
   
2. Calculating world dependencies... done!
   
3. [nomerge      ] gnome-base/gnome-2.20.1  USE="cups ldap -accessibility -cdr -dvdr -esd -mono"
   
4. [nomerge      ]  media-sound/sound-juicer-2.20.1  USE="-debug -flac -ogg -test"
   
5. [nomerge      ]   media-plugins/gst-plugins-cdparanoia-0.10.14
   
6. [ebuild     U ]    media-sound/cdparanoia-3.10_pre0 [3.9.8-r5] 0 kB
   
7. [nomerge      ] sci-biology/bioperl-1.5.1-r1  USE="gd mysql"
   
8. [nomerge      ]  dev-perl/Graph-0.81
   
9. [ebuild     UD]   dev-perl/Heap-0.71 [0.80] 0 kB
   
10. [nomerge      ] media-sound/sound-juicer-2.20.1  USE="-debug -flac -ogg -test"
    
11. [nomerge      ]  gnome-extra/nautilus-cd-burner-2.20.0  USE="-cdr -debug -dvdr"
    
12. [nomerge      ]   sys-apps/hal-0.5.9.1-r3  USE="acpi crypt disk-partition -debug -dell -doc -pcmcia (-selinux)"
    
13. [ebuild     UD]    sys-apps/parted-1.8.6 [1.8.8] USE="nls readline -debug -device-mapper (-selinux)" 0 kB
    
14. 
    
15. Total: 3 packages (1 upgrade, 2 downgrades), Size of downloads: 0 kB
    

复制代码

How to explain ?

zhllg

check ebuild
for example, in  /usr/portage/sys-apps/hal/hal-0.5.9.1-r3.ebuild, there i s:
disk-partition? ( <=sys-apps/parted-1.8.7 )