--- papers/freem_history/Makefile	2025/04/22 14:54:41	1.1
+++ papers/freem_history/Makefile	2025/04/22 17:54:09	1.2
@@ -1,15 +1,21 @@
 #
-# $Id: Makefile,v 1.1 2025/04/22 14:54:41 snw Exp $
+# $Id: Makefile,v 1.2 2025/04/22 17:54:09 snw Exp $
 #  Build file for FreeM History
 #
 # Copyright (C) 2025 Serena Willis
 #
 #   $Log: Makefile,v $
+#   Revision 1.2  2025/04/22 17:54:09  snw
+#   Initial draft of FreeM History paper
+#
 #   Revision 1.1  2025/04/22 14:54:41  snw
 #   Add Makefile for FreeM History
 #
 #
-all: freem_history.ps freem_history.txt freem_history.pdf
+
+outputs = freem_history.ps freem_history.txt freem_history.pdf
+
+all: $(outputs)
 
 freem_history.ps: freem_history.ms
 	refer freem_history.ms | tbl | groff -ms -Tps > freem_history.ps
@@ -20,4 +26,7 @@ freem_history.txt: freem_history.ms
 freem_history.pdf: freem_history.ps
 	ps2pdf freem_history.ps freem_history.pdf
 
-.PHONY: all
+clean:
+	rm -f $(outputs)
+
+.PHONY: all clean