b-triangle ~ # emerge -DNatuv world

These are the packages that I would merge, in reverse order:

Calculating world dependencies ...done!
[blocks B     ] media-libs/freeglut (is blocking media-libs/glut-3.7.1)
[blocks B     ] media-libs/glut (is blocking media-libs/freeglut-2.2.0)
[nomerge      ] sci-calculators/fung-calc-1.3.2b  +arts -debug +opengl -xinerama
[nomerge      ]  media-libs/glut-3.7.1
[nomerge      ] media-gfx/gimp-2.2.8-r1  -aalib (-altivec) -debug -doc +gimpprint -gtkhtml -hardened +jpeg +lcms -mmx +mng +png +python -smp -sse +svg +tiff -wmf
[nomerge      ]  dev-python/pygtk-2.8.2  -doc +opengl
[nomerge      ]   dev-python/pyopengl-2.0.0.44
[nomerge      ]    virtual/glut-1.0
[nomerge      ]     media-libs/freeglut-2.2.0
[nomerge      ] net-fs/samba-3.0.22  -acl -async -automount +cups -doc -examples -kerberos -ldap -ldapsam -libclamav -mysql -oav +pam -postgres +python -quotas +readline (-selinux) -swat -syslog -winbind +xml +xml2
[nomerge      ]  x11-libs/qt-3.3.6-r1  +cups -debug -doc -examples -firebird +gif -immqt -immqt-bc +ipv6 -mysql -nas -nis -odbc +opengl -postgres -sqlite -xinerama
[ebuild  N    ]   net-print/cups-1.1.23-r7  -gnutls +nls +pam +samba -slp +ssl 0 kB

Total size of downloads: 0 kB

!!! Error: The above package list contains packages which cannot be installed
!!!        on the same system.