fixes #1717, fixes #2324

tests/cpp/tstaticvar_via_typedesc.nim

@@ -0,0 +1,20 @@
+discard """
+  cmd: "nim cpp $file"
+  output: "42"
+"""
+
+# bug #2324
+
+static: assert defined(cpp), "compile in cpp mode"
+
+{.emit: """
+class Foo {
+public:
+    static int x;
+};
+int Foo::x = 42;
+""".}
+
+type Foo {.importcpp:"Foo".} = object
+proc x* (this: typedesc[Foo]): int {.importcpp:"Foo::x@", nodecl.}
+echo Foo.x