debug = Rscons::Environment.new(echo: :command) do |env|
  env['CFLAGS'] = '-O2'
  env['CPPFLAGS'] = '-DSTRING="Debug Version"'
  env.Program('program-debug.exe', Dir['src/*.c'])
end

release = debug.clone do |env|
  env["CPPFLAGS"] = '-DSTRING="Release Version"'
  env.Program('program-release.exe', Dir['src/*.c'])
end