add hello world embedded Ruby application

.gitignore

@@ -0,0 +1,2 @@
+*.exe
+.rsconscache

Rakefile.rb

@@ -0,0 +1,16 @@
+require "rscons"
+
+task :default do
+  Rscons::Environment.new do |env|
+    env["CC"] = "i686-pc-mingw32-gcc"
+    env["CPPPATH"] += [
+      "C:/Ruby193/include/ruby-1.9.1",
+      "C:/Ruby193/include/ruby-1.9.1/i386-mingw32",
+    ]
+    env["LIBS"] += ["msvcrt-ruby191"]
+    env["LDFLAGS"] += ["-LC:/Ruby193/lib"]
+    env["CFLAGS"] += ["-Wall"]
+    sources = Dir["*.c"]
+    env.Program("main", sources)
+  end
+end

main.c

@@ -0,0 +1,8 @@
+#include "ruby.h"
+
+int main(int argc, char *argv[])
+{
+    ruby_init();
+    rb_eval_string("puts 'Hello, C world from Ruby'");
+    return 0;
+}