Added VERSION information and a spec to check that it matches config.h.

src/ruby/flann.gemspec

@@ -1,11 +1,11 @@
 lib = File.expand_path('../lib/', __FILE__)
 $:.unshift lib unless $:.include?(lib)
 
-# require 'flann/version'
+require 'flann/version'
 
 Gem::Specification.new do |gem|
   gem.name = "flann"
-  gem.version = '0.0.1'
+  gem.version = Flann::VERSION::STRING
   gem.summary = "Ruby interface for FLANN, approximate nearest neighbors methods in C"
   gem.description = "Ruby interface for FLANN, approximate nearest neighbors methods in C"
   gem.homepage = 'http://www.cs.ubc.ca/research/flann/'

src/ruby/lib/flann.rb

@@ -1,8 +1,10 @@
 require 'ffi'
 require 'nmatrix'
 
+require_relative "flann/version.rb"
 require_relative "flann/index.rb"
 
+
 module Flann
   extend FFI::Library
   ffi_lib "libflann"

src/ruby/lib/flann/version.rb

@@ -0,0 +1,10 @@
+module Flann
+  module VERSION
+    MAJOR = 1
+    MINOR = 8
+    TINY  = 4
+    MINISCULE = 1
+
+    STRING = [MAJOR, MINOR, TINY, MINISCULE].compact.join('.')
+  end
+end

src/ruby/spec/flann_spec.rb

@@ -1,6 +1,20 @@
 require File.dirname(__FILE__) + "/spec_helper.rb"
 
 describe Flann do
+  it "::VERSION::STRING matches #define FLANN_VERSION_ in config.h" do
+    found = false
+    File.open(File.dirname(__FILE__) + "/../../cpp/flann/config.h", "r") do |f|
+      while line = f.gets
+        next unless line =~ /#[\s]*define[\s]+FLANN_VERSION_[\s]+"\d.\d.\d"/
+        fields = line.split
+        found = true
+        expect(fields.last[1...-1]).to eq(Flann::VERSION::STRING.split('.')[0...-1].join('.'))
+      end
+    end
+
+    raise("could not find version string in config.h") unless found
+  end
+
   context "#set_distance_type!" do
     it "sets the distance functor without error" do
       pending "distance type unsupported in the C bindings, use the C++ bindings instead"