Index: src/Makefile
--- src/Makefile.orig	2017-03-17 13:07:24.163175000 +0100
+++ src/Makefile	2017-03-17 13:08:42.339338000 +0100
@@ -62,7 +62,7 @@
 
 
 flags_unix:
-	$(eval CFLAGS := -I. -Iregexp -Wall -W $(CFLAGS_ADDTL))
+	$(eval CFLAGS := -I. -Iregexp $(CFLAGS_ADDTL))
 	$(eval LDFLAGS := -Lregexp $(LDFLAGS_ADDTL))
 	$(eval BOXES_EXECUTABLE_NAME := boxes)
 	$(eval ALL_OBJ := $(GEN_SRC:.c=.o) $(ORIG_NORM:.c=.o))
Index: src/boxes.c
--- src/boxes.c.orig	2017-03-17 10:24:58.000000000 +0100
+++ src/boxes.c	2017-03-17 13:07:24.163546000 +0100
@@ -49,7 +49,13 @@
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
+#if defined(__NetBSD__)
+#define _NETBSD_SOURCE
 #include <sys/stat.h>
+#undef  _NETBSD_SOURCE
+#else
+#include <sys/stat.h>
+#endif
 #include <unistd.h>
 #include "shape.h"
 #include "boxes.h"
Index: src/tools.c
--- src/tools.c.orig	2017-03-17 10:24:58.000000000 +0100
+++ src/tools.c	2017-03-17 13:07:24.163694000 +0100
@@ -30,6 +30,7 @@
 #include <stdio.h>
 #include <stdarg.h>
 #include <string.h>
+#include <stdlib.h>
 #include "shape.h"
 #include "boxes.h"
 #include "tools.h"