Makefile: restruct

Signed-off-by: HeshamTB <hishaminv@gmail.com>

.gitignore

@@ -1,5 +1,5 @@
 
-a.out
+hcc
 
 # File generated by flex and bison
 parser.c

Makefile

@@ -1,9 +1,22 @@
 
-all: flex bison
-	gcc expr.c parser.c scanner.c main.c
+
+SRC=
+all: scanner.c parser.c token.h
+	gcc  -o hcc expr.c parser.c scanner.c main.c
+
+scanner.c: flex
+
+parser.c: bison
+
+token.h: bison
 
 bison:
-	bison --defines=token.h --output=parser.c parser.bison
+	bison --debug --defines=token.h --output=parser.c parser.bison
 
 flex: bison
-	flex -o scanner.c scanner.flex
+	flex --debug -o scanner.c scanner.flex
+
+clean:
+	rm -vf parser.c scanner.c hcc token.h
+
+