improve librdkafka (#1026)

packages/l/librdkafka/xmake.lua

@@ -6,12 +6,21 @@ package("librdkafka")
              "https://github.com/edenhill/librdkafka.git")
     add_versions("v1.6.2", "b9be26c632265a7db2fdd5ab439f2583d14be08ab44dc2e33138323af60c39db")
 
+    add_configs("ssl", { description = "Enable ssl.", default = false, type = "boolean"})
+
     add_deps("cmake")
 
     add_links("rdkafka++", "rdkafka")
 
-    on_install("linux", "macosx", "windows", "mingw", "android", function (package)
+    on_load(function (package)
+        if package:config("ssl") then
+            package:add("deps", "openssl")
+        end
+    end)
+
+    on_install("linux", "macosx", "windows", "cross", function (package)
         local configs = {"-DRDKAFKA_BUILD_EXAMPLES=OFF", "-DRDKAFKA_BUILD_TESTS=OFF"}
+        table.insert(configs, "-DWITH_SSL=" .. (package:config("ssl") and "ON" or "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)