=begin
= Native Client port of Ruby

= How to build
== Prerequisites
You need to install the following things before building NaCl port of Ruby.
* Ruby 1.9.3 or later
* Python 2.6 or later
* NativeClient SDK pepper 37 or later
* GNU make

== Steps
(1) Extract all files from the tarball:
     $ tar xzf ruby-X.Y.Z.tar.gz
(2) Set NACL_SDK_ROOT environment variable to the path to the Native Client SDK you installed:
     $ export NACL_SDK_ROOT=/home/yugui/src/nacl_sdk/pepper_37
(3) Configure
     $ ./configure --prefix=/tmp/nacl-ruby --host=x86_64-nacl --with-baseruby=/path/to/ruby-1.9.3-or-later
(4) Make
     $ make
     $ make package

Now you have ruby.nexe. You can run it by sel_ldr in NaCl SDK.

"make package" installs "pepper-ruby.nexe", an example Pepper application that
embeds Ruby", and libraries to $prefix. You can run it by the following steps:
(5) Publish the $prefix directory on a web server
(6) Visit the example.html on the web server by a browser that implements Pepper 18 or later.
   -- e.g., Chrome 18 implements Pepper 18, Chrome 19 implements Pepper 19, ...

=== Example Configurations
* x86_32 Native Client
   $ ./configure --prefix=/tmp/nacl-ruby \
     --host=i686-nacl \
     --with-baseruby=/path/to/ruby-1.9.3-or-later
* arm Native Client
   $ ./configure --prefix=/tmp/nacl-ruby \
     --host=arm-nacl \
     --with-newlib \
     --with-baseruby=/path/to/ruby-1.9.3-or-later
* Portable Native Client
   $ ./configure --prefix=/tmp/nacl-ruby \
     --host=le32-nacl \
     --with-newlib \
     --with-static-linked-ext \
     --with-baseruby=/path/to/ruby-1.9.3-or-later

= Copyright
* Copyright 2012 Google Inc. All Rights Reserved.
* Author: yugui@google.com (Yugui Sonoda)
=end