Perhaps this is a dumb question... I am installing sciruby-full in Mint 18 (Ubuntu). System Ruby is(was?) 2.3 A sciruby package wanted v2.4 I used RVM to install Ruby 2.4 It installed fine. BUT: Ruby is now under /usr/local/rvm Postgresql for Ruby is in Synaptic, but somehow if it tries to install under gem, it acts as if it isnt there. But calling require for it, and another, gsl -which could not compile- yields TRUE. V2.3 seems to have disappeared, but occasionally shows up in compiling errors in /var/lib/gems . But nothing of 2.3 is in the envirnment vars. Has 2.3 been assimilated into 2.4, somehow? With Perl its pretty much straightforward. Another version a a completely separate directory structure, though in reality the older version SITE modules could have its directories added to the new version's path (at the end) with a potential for problems, but few in practice. I've read alot of stuff on Ruby, but nothing has addressed this aspect.
on 2017-03-07 08:23