forgot to add file

src/build_make.cc

@@ -0,0 +1,15 @@
+/* Build system implementation bits.
+ *
+ * This file is part of libostd. See COPYING.md for futher information.
+ */
+
+#include "ostd/build/make.hh"
+
+namespace ostd {
+namespace build {
+
+/* place the vtable in here */
+make_task::~make_task() {}
+
+} /* namespace build */
+} /* namespace ostd */