Update Makefile

Makefile

@@ -1,20 +1,23 @@
 CC ?= cc
 CFLAGS ?= -O2 -fPIC
 PREFIX ?= /usr/local
+VC ?= 0.1.17
 
-all: clean v
+all: v
 	$(info V has been successfully built)
 
-v: v.c
-	./v -o v compiler
+v: v.c.out
+	./v.c.out -o v compiler
 
 v-release: v.c
 	./v -cflags '${CFLAGS}' -o v compiler
 	strip v
 
-v.c:
-	curl -Os https://raw.githubusercontent.com/vlang/vc/master/v.c
-	${CC} -std=gnu11 -w -o v v.c -lm 
+v.c.out: v.${VC}.c
+	${CC} -std=gnu11 -w -o v.c.out v.${VC}.c -lm
+
+v.${VC}.c:
+	curl -o v.${VC}.c -Ls https://github.com/vlang/vc/raw/${VC}/v.c
 
 test: v
 	./v -prod -o vprod compiler # Test prod build
@@ -24,7 +27,7 @@ test: v
 	find examples -name '*.v' -print0 | xargs -0 -n1 ./v
 
 clean:
-	-rm -f v.c .v.c v vprod thirdparty/**/*.o
+	-rm -f v.c v*.c v.c.out v vprod thirdparty/**/*.o
 	find . -name '.*.c' -print0 | xargs -0 -n1 rm -f
 
 SOURCES = $(wildcard thirdparty/**/*.c)