From 7d79af602bb21fbeb3ca404d8c677b5bc4320071 Mon Sep 17 00:00:00 2001
From: Akinori MUSHA <knu@idaemons.org>
Date: Tue, 21 May 2013 00:00:21 +0900
Subject: [PATCH] Use [ instead of [[ for portability.

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 91d5a0c..48f9cd9 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ ext/digest/Makefile: ext/digest/extconf.rb
 	cd ext/digest && ruby extconf.rb
 
 clean:
-	if [[ -f ext/digest/Makefile ]]; then make -C ext/digest clean; fi
+	if [ -f ext/digest/Makefile ]; then make -C ext/digest clean; fi
 	rm -f ext/digest/Makefile
 	rm -f test/test_vectors.rb