libmodplug: add package (#2369)

* libmodplug: add package

* libmodplug: fix static on windows

packages/l/libmodplug/xmake.lua

@@ -0,0 +1,29 @@
+package("libmodplug")
+    set_homepage("http://modplug-xmms.sf.net")
+    set_description("libmodplug GitHub repository")
+    set_license("Public Domain")
+
+    add_urls("https://github.com/Konstanty/libmodplug.git")
+    add_versions("2022.1.31", "d1b97ed0020bc620a059d3675d1854b40bd2608d")
+
+    if is_plat("windows") then
+        add_syslinks("user32")
+    end
+
+    add_deps("cmake")
+
+    on_install(function (package)
+        local configs = {}
+        table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:debug() and "Debug" or "Release"))
+        if package:config("shared") then
+            table.insert(configs, "-DBUILD_SHARED_LIBS=ON")
+        else
+            table.insert(configs, "-DBUILD_SHARED_LIBS=OFF")
+            package:add("defines", "MODPLUG_STATIC")
+        end
+        import("package.tools.cmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:has_cxxfuncs("ModPlug_Load", {includes = "libmodplug/modplug.h"}))
+    end)