Improve Qt packages

xmake-repo/packages/q/qt5widgets/xmake.lua

@@ -16,9 +16,9 @@ package("qt5widgets")
         end
 
         return {
+            includedirs = {qt.includedir, path.join(qt.includedir, "QtWidgets")},
             links = table.wrap("Qt5Widgets" .. (package:is_plat("windows") and package:is_debug() and "d" or "")),
-            linkdirs = table.wrap(qt.libdir),
-            includedirs = table.wrap(qt.includedir)
+            linkdirs = table.wrap(qt.libdir)
         }
     end)
 
@@ -29,4 +29,14 @@ package("qt5widgets")
     end)
 
     on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            int test(int argc, char** argv) {
+                QApplication app (argc, argv);
+
+                QPushButton button ("Hello world !");
+                button.show();
+
+                return app.exec();
+            }
+        ]]}, {configs = {languages = "c++14", cxflags = not package:is_plat("windows") and "-fPIC" or nil}, includes = {"QApplication", "QPushButton"}}))
     end)