Makefile: take advantage of having separate build units

2 files changed, 8 insertions, 6 deletions

diff --git a/Makefile b/Makefile
index 24aa1d3..71887b1 100644
--- a/Makefile
+++ b/Makefile
@@ -3,8 +3,9 @@
 
 include config.mk
 
-SRC = main.c draw.c screen.c files.c lineset.c
+SRC = gramscii.c draw.c screen.c files.c lineset.c
 INC = config.h gramscii.h arg.h
+OBJ = ${SRC:.c=.o}
 DISTFILES = ${SRC} ${INC} Makefile config.mk README.md Changelog
 
 all: options gramscii
@@ -16,14 +17,15 @@ options:
 	@echo "LDFLAGS = ${LDFLAGS}"
 	@echo "CC      = ${CC}"
 	@echo "-+-+-+-+-+-+-+-+-+-+-" 
-	
 
-gramscii: ${SRC} ${INC}
-	${CC} ${CFLAGS} ${LDFLAGS} -o $@ ${SRC}
-	
+
+gramscii: ${OBJ}
+
+${OBJ}: ${INC}
+
 clean:
 	@echo cleaning
-	@rm -f gramscii
+	@rm -f gramscii ${OBJ}
 
 install: all
 	@echo installing executable to ${DESTDIR}${BINDIR}
diff --git a/main.c b/gramscii.c
index 9a6ef59..9a6ef59 100644
--- a/main.c
+++ b/gramscii.c