Update texinfo.rb to 6.4 and change to support unicode

packages/texinfo.rb

@@ -3,16 +3,30 @@ require 'package'
 class Texinfo < Package
   description 'Texinfo is the official documentation format of the GNU project.'
   homepage 'https://www.gnu.org/software/texinfo/'
-  version '6.3'
-  source_url 'http://ftp.gnu.org/gnu/texinfo/texinfo-6.3.tar.gz'
-  source_sha256 '300a6ba4958c2dd4a6d5ce60f0a335daf7e379f5374f276f6ba31a221f02f606'
+  version '6.4'
+  source_url 'http://ftpmirror.gnu.org/texinfo/texinfo-6.4.tar.xz'
+  source_sha256 '6ae2e61d87c6310f9af7c6f2426bd0470f251d1a6deb61fba83a3b3baff32c3a'
+
+  depends_on 'gettext' => :build
+  depends_on 'perl'
+  depends_on 'ncurses'
 
   def self.build
-    system "./configure"
+    # installing necessary perl modules
+    system 'cpan', 'install', 'CPAN', 'Locale::Messages', 'Text::Unidecode', 'Unicode::EastAsianWidth'
+
+    # configure and make
+    system './configure',
+        '--with-external-Text-Unidecode',
+        '--with-external-Unicode-EastAsianWidth'
     system "make"
   end
 
   def self.install
     system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
   end
+
+  def self.check
+    system "make check"
+  end
 end