class GoogleBenchmark < Formula
  desc "C++ microbenchmark support library"
  homepage "https://github.com/google/benchmark"
  url "https://github.com/google/benchmark/archive/v1.4.0.tar.gz"
  sha256 "616f252f37d61b15037e3c2ef956905baf9c9eecfeab400cb3ad25bae714e214"
  head "https://github.com/google/benchmark.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "76c2713d3de1596cf9cb298d906aebcd0c06259a4595ca519e7be3ae9b32a58e" => :high_sierra
    sha256 "e733b53d5fbddaf8a75a0fbcfe415c5bdb420a9666f770e06afa4e844cef45e9" => :sierra
    sha256 "79e9bdfa601cc661a7cc0c7129b54d11e7f0dc183ed85a0f67304a80c498626a" => :el_capitan
  end

  depends_on "cmake" => :build

  needs :cxx11

  def install
    ENV.cxx11
    system "cmake", "-DBENCHMARK_ENABLE_GTEST_TESTS=OFF", *std_cmake_args
    system "make", "install"
  end

  test do
    (testpath/"test.cpp").write <<~EOS
      #include <string>
      #include <benchmark/benchmark.h>
      static void BM_StringCreation(benchmark::State& state) {
        while (state.KeepRunning())
          std::string empty_string;
      }
      BENCHMARK(BM_StringCreation);
      BENCHMARK_MAIN();
    EOS
    flags = ["-stdlib=libc++", "-I#{include}", "-L#{lib}", "-lbenchmark"] + ENV.cflags.to_s.split
    system ENV.cxx, "-o", "test", "test.cpp", *flags
    system "./test"
  end
end