require 'formula' class Nlopt < Formula homepage 'http://ab-initio.mit.edu/wiki/index.php/NLopt' url 'http://ab-initio.mit.edu/nlopt/nlopt-2.4.tar.gz' sha1 'e766f4c49fa5923fb45220f278c01c04c38fc369' option :cxx11 def install ENV.cxx11 if build.cxx11? system "./configure", "--prefix=#{prefix}" system "make" system "make install" end end