cnl: add package (#5346)

* cnl: add package

* add check

packages/c/cnl/xmake.lua

@@ -0,0 +1,30 @@
+package("cnl")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/johnmcfarlane/cnl")
+    set_description("A Compositional Numeric Library for C++")
+    set_license("BSL-1.0")
+
+    add_urls("https://github.com/johnmcfarlane/cnl.git")
+
+    add_versions("2023.12.23", "7b6172f3d657147964079e91d078302d853419c5")
+
+    add_deps("cmake")
+
+    if on_check then
+        on_check("android", function (package)
+            local ndk = package:toolchain("ndk"):config("ndkver")
+            assert(ndk and tonumber(ndk) > 22, "package(cnl) require ndk version > 22")
+        end)
+    end
+
+    on_install(function (package)
+        io.replace("CMakeLists.txt", [[add_subdirectory("test")]], "", {plain = true})
+
+        import("package.tools.cmake").install(package, {
+            "-DCMAKE_BUILD_TYPE=" .. (package:is_debug() and "Debug" or "Release")
+        })
+    end)
+
+    on_test(function (package)
+        assert(package:has_cxxincludes("cnl/all.h", {configs = {languages = "c++20"}}))
+    end)