build on linux

.gitignore

@@ -1,3 +1,4 @@
 *.exe
 .rsconscache
 /out.txt
+/main

Rakefile.rb

@@ -2,6 +2,7 @@ require "rscons"
 
 task :default do
   Rscons::Environment.new do |env|
+    if RUBY_PLATFORM =~ /cygwin/
       env["CC"] = "i686-pc-mingw32-gcc"
       env["CPPPATH"] += [
         "C:/Ruby193/include/ruby-1.9.1",
@@ -9,6 +10,9 @@ task :default do
       ]
       env["LIBS"] += ["msvcrt-ruby191"]
       env["LDFLAGS"] += ["-LC:/Ruby193/lib"]
+    else
+      env.parse_flags!("!pkg-config --cflags --libs ruby-1.9")
+    end
     env["CFLAGS"] += ["-Wall"]
     sources = Dir["*.c"]
     env.Program("main", sources)