Mildly working build process with argument parsing

lib/xalloc.h

@@ -0,0 +1,14 @@
+#ifndef ZMAP_ALLOC_H
+#define ZMAP_ALLOC_H
+
+#include <stddef.h>
+
+void* xcalloc(size_t count, size_t size);
+
+void xfree(void *ptr);
+
+void* xmalloc(size_t size);
+
+void* xrealloc(void *ptr, size_t size);
+
+#endif