sudo revdep-rebuild -- -av
* Configuring search environment for revdep-rebuild

* Checking reverse dependencies
* Packages containing binaries and libraries broken by a package update
* will be emerged.

* Collecting system binaries and libraries
* Generated new 1_files.rr
* Collecting complete LD_LIBRARY_PATH
* Generated new 2_ldpath.rr
* Checking dynamic linking consistency
[ 22% ] *   broken /usr/bin/scilab-bin (requires libjava.so
libjvm.so                                                  
libverify.so)
[ 84% ] *   broken /usr/lib64/scilab/libjavasci.so.5.0.1 (requires libjava.so
libjvm.so                                                                    
libverify.so)
*   broken /usr/lib64/scilab/libsciconsole.so.5.0.1 (requires libjava.so
libjvm.so                                                               
libverify.so)
[ 85% ] *   broken /usr/lib64/scilab/libscigraphics.so.5.0.1 (requires libjava.so
libjvm.so                                                                        
libverify.so)
*   broken /usr/lib64/scilab/libscihistory_manager.so.5.0.1 (requires libjava.so
libjvm.so                                                                       
libverify.so)
*   broken /usr/lib64/scilab/libscijvm.so.5.0.1 (requires libjava.so
libjvm.so                                                           
libverify.so)
*   broken /usr/lib64/scilab/libscilab.so.0.0.0 (requires libjava.so
libjvm.so                                                           
libverify.so)
*   broken /usr/lib64/scilab/libscilocalization.so.5.0.1 (requires libjava.so
libjvm.so                                                                    
libverify.so)
*   broken /usr/lib64/scilab/libsciscicos.so.5.0.1 (requires libjava.so
libjvm.so                                                              
libverify.so)
*   broken /usr/lib64/scilab/libsciscicos_blocks.so.5.0.1 (requires libjava.so
libjvm.so                                                                     
libverify.so)
*   broken /usr/lib64/scilab/libscishell.so.5.0.1 (requires libjava.so
libjvm.so                                                             
libverify.so)
[ 100% ]                 
* Generated new 3_broken.rr
* Assigning files to packages
*   /usr/bin/scilab-bin -> sci-mathematics/scilab
*   /usr/lib64/scilab/libjavasci.so.5.0.1 -> sci-mathematics/scilab
*   /usr/lib64/scilab/libsciconsole.so.5.0.1 -> sci-mathematics/scilab
*   /usr/lib64/scilab/libscigraphics.so.5.0.1 -> sci-mathematics/scilab
*   /usr/lib64/scilab/libscihistory_manager.so.5.0.1 -> sci-mathematics/scilab
*   /usr/lib64/scilab/libscijvm.so.5.0.1 -> sci-mathematics/scilab
*   /usr/lib64/scilab/libscilab.so.0.0.0 -> sci-mathematics/scilab
*   /usr/lib64/scilab/libscilocalization.so.5.0.1 -> sci-mathematics/scilab
*   /usr/lib64/scilab/libsciscicos.so.5.0.1 -> sci-mathematics/scilab
*   /usr/lib64/scilab/libsciscicos_blocks.so.5.0.1 -> sci-mathematics/scilab
*   /usr/lib64/scilab/libscishell.so.5.0.1 -> sci-mathematics/scilab
* Generated new 4_raw.rr and 4_owners.rr
* Cleaning list of packages to rebuild
* Generated new 4_pkgs.rr
* Assigning packages to ebuilds
* Generated new 4_ebuilds.rr
* Evaluating package order
* Generated new 5_order.rr
* All prepared. Starting rebuild
emerge --oneshot -av sci-mathematics/scilab:0
..........                                   

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

Calculating dependencies ... done!
[ebuild   R   ] sci-mathematics/scilab-5.1.1  USE="fftw gui matio scicos tk umfpack -debug -doc (-pvm)" 0 kB [1]

Total: 1 package (1 reinstall), Size of downloads: 0 kB
Portage tree and overlays:
 [0] /usr/portage
 [1] /usr/local/portage