From dd05fd95e634301ee97b65d33b0123d13bb3cd8b Mon Sep 17 00:00:00 2001
From: Zhao Junwang <zhjwpku@gmail.com>
Date: Jun 27 2023 01:44:05 +0000
Subject: add phony target


when executing `make install` on ubuntu, I got:

make: 'install' is up to date.

This is due to the INSTALL file in the src tree, adding phony target
should resolve this issue.

Signed-off-by: Zhao Junwang <zhjwpku@gmail.com>

---

diff --git a/Makefile b/Makefile
index c1fb831..681ebbb 100644
--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,8 @@ prefix=/usr
 includedir=$(prefix)/include
 libdir=$(prefix)/lib
 
+.PHONY: all install clean
+
 default: all
 
 all: