gentoo-overlay/sys-apps/setserial/files/setserial-2.17-build.patch

--- a/Makefile.in
+++ b/Makefile.in
@@ -20,7 +20,7 @@
 all: setserial setserial.cat
 
 setserial: setserial.c
-	$(CC) $(CFLAGS) $(DEFS) $(INCS) setserial.c -o setserial
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(DEFS) $(INCS) setserial.c -o setserial
 
 setserial.cat: setserial.8
 	nroff -man setserial.8 > setserial.cat