Add a test app for thread local variables with destructors

test/tlstest-lib.cpp

@@ -0,0 +1,38 @@
+#define WIN32_LEAN_AND_MEAN
+#include <stdio.h>
+#include <windows.h>
+#include <stdlib.h>
+
+class Hello {
+public:
+    Hello(const char* s) {
+        str = s;
+        thread = GetCurrentThreadId();
+        fprintf(stderr, "%s ctor on thread %d\n", str, thread);
+    }
+    ~Hello() {
+        fprintf(stderr, "%s dtor from thread %d, now on %d\n", str, thread, (int) GetCurrentThreadId());
+    }
+    const char* str;
+    int thread;
+};
+
+Hello lib_h("lib global");
+static thread_local Hello lib_tls_h("lib global tls");
+
+static void lib_atexit(void) {
+    fprintf(stderr, "lib_atexit\n");
+}
+
+static class SetAtexit {
+public:
+    SetAtexit() {
+        atexit(lib_atexit);
+    }
+} sa;
+
+extern "C" void __declspec(dllexport) func(void) {
+    fprintf(stderr, "func\n");
+    static thread_local Hello h2("lib local tls");
+    fprintf(stderr, "func end, thread %d\n", lib_tls_h.thread);
+}