Enable INET6 by default in helloworld.

Author: jfb8856606

example/Makefile

@@ -18,7 +18,7 @@ LIBS+= -Wl,--no-whole-archive -lrt -lm -ldl -lcrypto -pthread -lnuma
 
 TARGET="helloworld"
 all:
-	cc ${CFLAGS} -o ${TARGET} main.c ${LIBS}
+	cc ${CFLAGS} -DINET6 -o ${TARGET} main.c ${LIBS}
 	cc ${CFLAGS} -o ${TARGET}_epoll main_epoll.c ${LIBS}
 
 .PHONY: clean