--- ed-1.15/Makefile.in.orig	Sat Feb  1 14:22:52 2020
+++ ed-1.15/Makefile.in	Sat Feb  1 14:23:06 2020
@@ -20,7 +20,7 @@
 all : $(progname) r$(progname)
 
 $(progname) : $(objs)
-	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $(objs)
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $(objs) -lpcre2-posix -lpcre2-8
 
 r$(progname) : r$(progname).in
 	cat $(VPATH)/r$(progname).in > $@