emerge -pv ntp

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

Calculating dependencies ...done!
[ebuild  N    ] media-sound/alsa-headers-1.0.11  2,288 kB
[ebuild  N    ] media-libs/alsa-lib-1.0.11  -doc 689 kB
[ebuild  N    ] dev-java/java-config-1.2.11-r1  15 kB
[ebuild  N    ] dev-java/blackdown-jdk-1.4.2.03  -X +alsa -browserplugin -doc -mozilla -nsplugin 33,570 kB
[ebuild  N    ] dev-lang/swig-1.3.21  -X -doc -guile +java +perl +php +python +ruby -tcltk 1,975 kB
[ebuild  N    ] sys-libs/libcap-1.10-r5  -nocxx +python -static 38 kB
[ebuild  N    ] net-misc/ntp-4.2.0.20040617-r3  -debug +ipv6 -logrotate -nodroproot -openntpd -parse-clocks (-selinux) +ssl 2,403 kB

package.use file

sys-power/apcupsd snmp
net-ftp/ftp -ipv6
net-misc/ntp -alsa -java

USE="-alsa -java" emerge -pv ntp

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

Calculating dependencies ...done!
[ebuild  N    ] dev-lang/swig-1.3.21  -X -doc -guile -java +perl +php +python +ruby -tcltk 1,975 kB
[ebuild  N    ] sys-libs/libcap-1.10-r5  -nocxx +python -static 38 kB
[ebuild  N    ] net-misc/ntp-4.2.0.20040617-r3  -debug +ipv6 -logrotate -nodroproot -openntpd -parse-clocks (-selinux) +ssl 2,403 kB

Total size of downloads: 4,417 kB