More ergonomic solution using macros, but still needs improvement

Makefile

@@ -13,7 +13,7 @@ CLOX_OUT  = clox
 all: cclox clox
 
 cclox: ${CCLOX_SRC}
-	${CXX} ${CFLAGS} ${CCLOX_SRC} -o ${CCLOX_OUT}
+	${CXX} -std=c++20 ${CFLAGS} ${CCLOX_SRC} -o ${CCLOX_OUT}
 
 clox: ${CLOX_SRC}
 	${CC} ${CFLAGS} ${CLOX_SRC} -o ${CLOX_OUT}