sup.gemspec in sup-0.19.0 vs sup.gemspec in sup-0.20.0

@@ -23,20 +23,35 @@
 DESC
   s.post_install_message = <<-EOF
 SUP: please note that our old mailing lists have been shut down,
      re-subscribe to [e-mail] to discuss and follow
      updates on sup (send email to: [e-mail]).
+
+     OpenBSD users:
+     If your operating system is OpenBSD you have some
+     additional, manual steps to do before Sup will work, see:
+     https://github.com/sup-heliotrope/sup/wiki/Installation%3A-OpenBSD.
   EOF
 
   s.files         = `git ls-files -z`.split("\x0")
   s.executables   = s.files.grep(%r{^bin/}) { |f| File.basename(f) }
   s.test_files    = s.files.grep(%r{^(test|spec|features)/})
   s.require_paths = ["lib"]
+  s.extra_rdoc_files = Dir.glob("man/*")
 
   s.required_ruby_version = '>= 1.9.3'
 
-  s.add_runtime_dependency "xapian-ruby", "~> 1.2.15"
+  # this is here to support skipping the xapian-ruby installation on OpenBSD
+  # because the xapian-ruby gem doesn't install on OpenBSD, you must install
+  # xapian-core and xapian-bindings manually on OpenBSD
+  # see https://github.com/sup-heliotrope/sup/wiki/Installation%3A-OpenBSD
+  # and https://en.wikibooks.org/wiki/Ruby_Programming/RubyGems#How_to_install_different_versions_of_gems_depending_on_which_version_of_ruby_the_installee_is_using
+  s.extensions = %w[ext/mkrf_conf_xapian.rb]
+
+  ## remember to update the xapian dependency in
+  ## ext/mkrf_conf_xapian.rb and Gemfile.
+
   s.add_runtime_dependency "ncursesw", "~> 1.4.0"
   s.add_runtime_dependency "rmail-sup", "~> 1.0.1"
   s.add_runtime_dependency "highline"
   s.add_runtime_dependency "trollop", ">= 1.12"
   s.add_runtime_dependency "lockfile"
@@ -48,6 +63,7 @@
   s.add_development_dependency "bundler", "~> 1.3"
   s.add_development_dependency "rake"
   s.add_development_dependency "minitest", "~> 4.7"
   s.add_development_dependency "rr", "~> 1.0.5"
   s.add_development_dependency "gpgme", ">= 2.0.2"
+
 end