Fix build issues in make_object; fix linkage issues

mesosphere/source/my_libc.c

@@ -1,4 +1,4 @@
-/* Note: copied from newlib */
+/* Note: copied from newlib or libgcc */
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -86,15 +86,6 @@ __libc_fini_array (void)
 }
 #endif
 
-int
-__cxa_atexit (void (*fn) (void *),
-	void *arg,
-	void *d)
-{
-  return 0;
-}
-void *__dso_handle = 0;
-
 /*
 FUNCTION
 	<<memmove>>---move possibly overlapping memory

mesosphere/source/my_libstdc++.cpp

@@ -3,4 +3,21 @@
 void *operator new(std::size_t) { for(;;); }
 void *operator new[](std::size_t) { for(;;); }
 void operator delete(void *) { }
+void operator delete(void *, std::size_t) { }
 void operator delete[](void *) { }
+void operator delete[](void *, std::size_t) { }
+
+extern "C" {
+
+int
+__cxa_atexit (void (*fn) (void *),
+	void *arg,
+	void *d)
+{
+  return 0;
+}
+void *__dso_handle = 0;
+
+[[noreturn]] void __cxa_pure_virtual() { for (;;); }
+
+}

mesosphere/source/test.cpp

@@ -1,4 +1,11 @@
+#include <mesosphere/core/make_object.hpp>
+#include <mesosphere/processes/KEvent.hpp>
+
+using namespace mesosphere;
+
 int main(void) {
+    auto obj = MakeObjectRaw<KEvent>();
+    (void)obj;
     for(;;);
     return 0;
 }