fpm: add package (#5353)

packages/f/fpm/xmake.lua

@@ -0,0 +1,21 @@
+package("fpm")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://mikelankamp.github.io/fpm")
+    set_description("C++ header-only fixed-point math library")
+    set_license("MIT")
+
+    add_urls("https://github.com/MikeLankamp/fpm.git")
+
+    add_versions("2024.09.06", "464cf63a5b1a4537e2b86014b2b72f4cfbdfd779")
+
+    on_install(function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void test() {
+                fpm::fixed_16_16 x;
+            }
+        ]]}, {configs = {languages = "c++11"}, includes = "fpm/fixed.hpp"}))
+    end)