add cargs (#1623)

* add cargs

* fix cargs

* fix cargs (disable warnings-as-errors)

packages/c/cargs/xmake.lua

@@ -0,0 +1,25 @@
+package("cargs")
+    set_homepage("https://likle.github.io/cargs/")
+    set_description("A lightweight cross-platform getopt alternative that works on Linux, Windows and macOS. Command line argument parser library for C/C++. Can be used to parse argv and argc parameters.")
+    set_license("MIT")
+
+    add_urls("https://github.com/likle/cargs/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/likle/cargs.git")
+    add_versions("v1.0.3", "ddba25bd35e9c6c75bc706c126001b8ce8e084d40ef37050e6aa6963e836eb8b")
+
+    add_deps("cmake")
+
+    on_install(function (package)
+        -- Disable warnings as errors
+        io.replace("cmake/EnableWarnings.cmake", "[^\n]*WX[^\n]*", "")
+        io.replace("cmake/EnableWarnings.cmake", "[^\n]*Werror[^\n]*", "")
+
+        local configs = {}
+        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)
+    end)
+
+    on_test(function (package)
+        assert(package:has_cfuncs("cag_option_prepare", {includes = "cargs.h"}))
+    end)