add package benchmark (#121)

packages/b/benchmark/xmake.lua

@@ -0,0 +1,33 @@
+package("benchmark")
+
+    set_homepage("https://github.com/google/benchmark")
+    set_description("A microbenchmark support library")
+
+    add_urls("https://github.com/google/benchmark/archive/v$(version).tar.gz",
+             "https://github.com/google/benchmark.git")
+    add_versions("1.5.2", "dccbdab796baa1043f04982147e67bb6e118fe610da2c65f88912d73987e700c")
+
+    if is_plat("linux") then
+        add_syslinks("pthread")
+    elseif is_plat("windows") then
+        add_syslinks("shlwapi")
+    end
+
+    on_install("macosx", "linux", "windows", function (package)
+        local configs = {"-DBENCHMARK_ENABLE_TESTING=OFF"}
+        table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:debug() and "Debug" or "Release"))
+        table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))
+        import("package.tools.cmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void BM_empty(benchmark::State& state) {
+              for (auto _ : state) {
+                benchmark::DoNotOptimize(state.iterations());
+              }
+            }
+            BENCHMARK(BM_empty);
+            BENCHMARK(BM_empty)->ThreadPerCpu();
+        ]]}, {configs = {languages = "c++11"}, includes = "benchmark/benchmark.h"}))
+    end)