class Tbb < Formula
  desc "Rich and complete approach to parallelism in C++"
  homepage "https://www.threadingbuildingblocks.org/"
  url "https://github.com/01org/tbb/archive/2018_U3.tar.gz"
  version "2018_U3"
  sha256 "23793c8645480148e9559df96b386b780f92194c80120acce79fcdaae0d81f45"
  revision 1

  bottle do
    sha256 "8cbd67c35cacf110d90157d970845b881ae80be2d1c2f5c6498e83dd7c47c620" => :high_sierra
    sha256 "3a12b35651d80de3db0c34d68d6f9e55d4cdf4315060d0deb2a9c1475edad177" => :sierra
    sha256 "263e771e491b8b012e82d8f9072df83bf5cdf30d395ed07ca8490532c34abc3c" => :el_capitan
  end

  # requires malloc features first introduced in Lion
  # https://github.com/Homebrew/homebrew/issues/32274
  depends_on :macos => :lion
  depends_on "python@2"
  depends_on "swig" => :build

  def install
    compiler = (ENV.compiler == :clang) ? "clang" : "gcc"
    args = %W[tbb_build_prefix=BUILDPREFIX compiler=#{compiler}]

    system "make", *args
    lib.install Dir["build/BUILDPREFIX_release/*.dylib"]
    include.install "include/tbb"

    cd "python" do
      ENV["TBBROOT"] = prefix
      system "python", *Language::Python.setup_install_args(prefix)
    end
  end

  test do
    (testpath/"test.cpp").write <<~EOS
      #include <tbb/task_scheduler_init.h>
      #include <iostream>

      int main()
      {
        std::cout << tbb::task_scheduler_init::default_num_threads();
        return 0;
      }
    EOS
    system ENV.cxx, "test.cpp", "-L#{lib}", "-ltbb", "-o", "test"
    system "./test"
  end
end