add abseil

packages/a/abseil/xmake.lua

@@ -0,0 +1,28 @@
+package("abseil")
+
+    set_homepage("https://abseil.io")
+    set_description("C++ Common Libraries")
+
+    add_urls("https://github.com/abseil/abseil-cpp/archive/$(version).tar.gz",
+             "https://github.com/abseil/abseil-cpp.git")
+    add_versions("20200225.1", "0db0d26f43ba6806a8a3338da3e646bb581f0ca5359b3a201d8fb8e4752fd5f8")
+
+    add_deps("cmake")
+
+    on_install("macosx", "linux", "windows", function (package)
+        import("package.tools.cmake").install(package)
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <iostream>
+            #include <string>
+            #include <vector>
+            #include "absl/strings/str_join.h"
+            void test () {
+                std::vector<std::string> v = {"foo","bar","baz"};
+                std::string s = absl::StrJoin(v, "-");
+                std::cout << "Joined string: " << s << "\\n";
+            }
+        ]]}, {configs = {languages = "c++11"}}))
+    end)