add mingw support to msgpack-cxx (#2167)

packages/m/msgpack-cxx/xmake.lua

@@ -10,7 +10,7 @@ package("msgpack-cxx")
     add_configs("std", {description = "Choose C++ standard version.", default = "cxx17", type = "string", values = {"cxx98", "cxx11", "cxx14", "cxx17", "cxx20"}})
 
     add_deps("cmake", "boost")
-    on_install("windows", "macosx", "linux", function (package)
+    on_install("windows", "macosx", "linux", "mingw", function (package)
         local configs = {"-DMSGPACK_BUILD_EXAMPLES=OFF", "-DMSGPACK_BUILD_TESTS=OFF", "-DMSGPACK_BUILD_DOCS=OFF", "-DMSGPACK_USE_STATIC_BOOST=ON"}
         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"))