To build on solaris, you will need some additional packages.

sudo pkgin install erlang-14.1.1 spidermonkey-1.8.0 icu-4.2.1 scmgit-1.7.0.7

BigCouch is tested on 5.11 snv_121 (http://genunix.org/dist/indiana/osol-1002-121-x86.iso)