Index: src/doodle/Makefile.in
--- src/doodle/Makefile.in.orig	2021-03-03 22:58:58.253157000 +0100
+++ src/doodle/Makefile.in	2021-03-03 22:59:47.176462000 +0100
@@ -160,8 +160,7 @@
 am_libhelper1_la_OBJECTS = grow.lo
 libhelper1_la_OBJECTS = $(am_libhelper1_la_OBJECTS)
 libhelper2_la_DEPENDENCIES =
-am_libhelper2_la_OBJECTS = help.lo files.lo index.lo getopt.lo \
-	getopt1.lo
+am_libhelper2_la_OBJECTS = help.lo files.lo index.lo
 libhelper2_la_OBJECTS = $(am_libhelper2_la_OBJECTS)
 am_doodle_OBJECTS = convert.$(OBJEXT) doodle.$(OBJEXT)
 doodle_OBJECTS = $(am_doodle_OBJECTS)
Index: src/doodle/index.c
--- src/doodle/index.c.orig	2021-01-27 00:29:47.000000000 +0100
+++ src/doodle/index.c	2021-03-03 22:58:58.253801000 +0100
@@ -35,6 +35,7 @@
 #include "doodle.h"
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <signal.h>
 #include <unistd.h>
 #include <signal.h>