<snip>
Some of them should not be needed at all:
libv8 - This is used by therubyracer as far as I know. The system libv8 is used for therubyracer instead and if there is other need, it should be used there as well.
</snip>
This is unfortunately not true for new therubyracer versions. therubyracer now depends on libv8 again and libv8 can either use its bundled version of v8 or the system one [1]. So I guess we will end up with rubygem-libv8 eventually.

Vít


--
Regards,
Bohuslav "Slavek" Kabrda.

[1] https://github.com/cowboyd/therubyracer/commit/fa2787ab4e8380df6eb02c05cb678b2d29bff2ed