libsigcplusplus: add package (#2654)

* libsigcplusplus: add package

* improve config name

* disable plat

* disable plat

packages/l/libsigcplusplus/xmake.lua

@@ -0,0 +1,44 @@
+package("libsigcplusplus")
+    set_homepage("https://libsigcplusplus.github.io/libsigcplusplus/")
+    set_description("libsigc++ implements a typesafe callback system for standard C++. It allows you to define signals and to connect those signals to any callback function, either global or a member function, regardless of whether it is static or virtual.")
+    set_license("LGPL-3.0")
+
+    add_urls("https://github.com/libsigcplusplus/libsigcplusplus/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/libsigcplusplus/libsigcplusplus.git")
+
+    add_versions("3.4.0", "445d889079041b41b368ee3b923b7c71ae10a54da03bc746f2d0723e28ba2291")
+
+    add_configs("deprecated_api", {description = "Build deprecated API and include it in the library", default = false, type = "boolean"})
+    if is_plat("wasm") then
+        add_configs("shared", {description = "Build shared library.", default = false, type = "boolean", readonly = true})
+    end
+
+    add_deps("meson", "ninja")
+    add_includedirs("include/sigc++-3.0", "lib/sigc++-3.0/include")
+
+    on_install("windows", "linux", "macosx", "mingw", "msys", "iphoneos", "cross", "wasm", function (package)
+        local configs = {"-Dvalidation=false", "-Dbuild-examples=false", "-Dbuild-tests=false"}
+        table.insert(configs, "-Dbuild-deprecated-api=" .. (package:config("deprecated_api") and "true" or "false"))
+        if package:config("shared") then
+            table.insert(configs, "-Ddefault_library=shared")
+        else
+            table.insert(configs, "-Ddefault_library=static")
+            if package:is_plat("windows") then
+                package:add("defines", "SIGC_BUILD")
+            end
+        end
+        import("package.tools.meson").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <string>
+            #include <sigc++/sigc++.h>
+            void on_print(const std::string& str) {}
+            void test() {
+                sigc::signal<void(const std::string&)> signal_print;
+                signal_print.connect(sigc::ptr_fun(&on_print));
+                signal_print.emit("hello world\n");
+            }
+        ]]}, {configs = {languages = "c++17"}}))
+    end)