--- nwcc_0.8.2.old/cpp/n_libc.h
+++ nwcc_0.8.2/cpp/n_libc.h
@@ -85,7 +85,10 @@
 #define DEBUG_MALLOC
 #endif
 
-#define free(x) dofree(x)
+#ifdef DEBUG_FREE
+#undef free
+#define free(x) ((void) x)
+#endif
 
 #ifdef DEBUG_MALLOC
 #define n_xmalloc(x) n_xmalloc((x) + 50)