polarina@unix-polarina ~ $ emerge -pv lua

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U ] dev-lang/lua-5.1.2-r1 [5.1.1-r2] USE="readline -static" 210 kB 

Total: 1 package (1 upgrade), Size of downloads: 210 kB
polarina@unix-polarina ~ $ emerge -pv --update --deep --newuse world

These are the packages that would be merged, in order:

Calculating world dependencies... done!

Total: 0 packages, Size of downloads: 0 kB
polarina@unix-polarina ~ $ 





## This looks odd at first, but it isn't when you think smart.
## Maybe after a sync, all applications that I had that depended on lua don't
## depend on it anymore.
## Because of that,  "emerge --deepclean"  must want to remove lua, right?





polarina@unix-polarina ~ $ emerge -pv --depclean

*** WARNING ***  Depclean may break link level dependencies.  Thus, it is
*** WARNING ***  recommended to use a tool such as `revdep-rebuild` (from
*** WARNING ***  app-portage/gentoolkit) in order to detect such breakage.
*** WARNING ***  
*** WARNING ***  Also study the list of packages to be cleaned for any obvious
*** WARNING ***  mistakes. Packages that are part of the world set will always
*** WARNING ***  be kept.  They can be manually added to this set with
*** WARNING ***  `emerge --noreplace <atom>`.  Packages that are listed in
*** WARNING ***  package.provided (see portage(5)) will be removed by
*** WARNING ***  depclean, even if they are part of the world set.
*** WARNING ***  
*** WARNING ***  As a safety measure, depclean will not remove any packages
*** WARNING ***  unless *all* required dependencies have been resolved.  As a
*** WARNING ***  consequence, it is often necessary to run 
*** WARNING ***  `emerge --update --newuse --deep world` prior to depclean.

Calculating dependencies... done!


>>> These are the packages that would be unmerged:

 sys-libs/db
    selected: 4.2.52_p4-r2 
   protected: none
     omitted: 4.3.29-r2 

 dev-perl/Archive-Zip
    selected: 1.16 
   protected: none
     omitted: none

 app-text/hunspell
    selected: 1.1.4-r1 
   protected: none
     omitted: none

 app-text/texi2html
    selected: 1.76 
   protected: none
     omitted: none

 app-admin/eselect-oodict
    selected: 20060706 
   protected: none
     omitted: none

 sys-apps/hotplug-base
    selected: 20040401 
   protected: none
     omitted: none

 dev-libs/boost
    selected: 1.33.1-r1 
   protected: none
     omitted: none

 net-nds/openldap
    selected: 2.3.24-r1 
   protected: none
     omitted: none

 app-text/enscript
    selected: 1.6.4-r2 
   protected: none
     omitted: none

 virtual/libstdc++
    selected: 3.3 
   protected: none
     omitted: none

 sys-libs/libstdc++-v3
    selected: 3.3.4 
   protected: none
     omitted: none

 dev-libs/icu
    selected: 3.6 
   protected: none
     omitted: none

>>> 'Selected' packages are slated for removal.
>>> 'Protected' and 'omitted' packages will not be removed.

Packages installed:   620
Packages in world:    29
Packages in system:   56
Unique package names: 620
Required packages:    608
Number to remove:     12
polarina@unix-polarina ~ $ 





## It doesn't want to remove lua! There must be something wrong... :S