automatically create GNUmakerules and GNUmakevars

shuffle/GNUmakefile

@@ -1,5 +1,9 @@
 include GNUmakevars
-include GNUmakerules
+
+CONFDIR=../../configure
+CONFDIR_exists=$(shell [ -d $(CONFDIR) ] && echo ok)
+
+all: shuffle
 
 shuffle: shuffle.o
 	$(CC) $^ -lant -o $@
@@ -11,3 +15,20 @@ install: $(BINDIR)/shuffle
 
 distclean: clean
 	rm -f *.bak *.d
+
+GNUmakevars: GNUmakevars.sh
+	sh ./$^ > $@
+GNUmakerules: GNUmakerules.sh
+	sh ./$^ > $@
+
+customize: configure
+	sh ./configure
+
+ifeq ($(CONFDIR_exists),ok)
+
+configure: $(CONFDIR)/start $(CONFDIR)/perl $(CONFDIR)/finish
+	cat $^ > $@
+
+endif
+
+include GNUmakerules

shuffle/GNUmakerules.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "\$(BINDIR)/%: %"
+echo -e "\tcp \$^ \$@"

shuffle/GNUmakevars.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+prefix=${prefix:-/usr/local}
+echo "BINDIR=$prefix/bin"
+echo
+echo "all:"