From eddda577a4dd7f8fb4fb67fd1600c2a7c5de40c7 Mon Sep 17 00:00:00 2001
From: Tianon Gravi <admwiggin@gmail.com>
Date: Mon, 16 Dec 2013 22:54:06 -0700
Subject: [PATCH] Fix "go tool cover" detection to only add -cover and
 -coverprofile if we both have cover support in Go, and if we have the cover
 tool downloaded

---
 hack/make.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hack/make.sh b/hack/make.sh
index 91f641af89..c49a37e9a2 100755
--- a/hack/make.sh
+++ b/hack/make.sh
@@ -66,7 +66,10 @@ LDFLAGS_STATIC='-X github.com/dotcloud/docker/utils.IAMSTATIC true -linkmode ext
 BUILDFLAGS='-tags netgo'
 
 HAVE_GO_TEST_COVER=
-if go help testflag | grep -q -- -cover; then
+if \
+	go help testflag | grep -q -- -cover \
+	&& go tool -n cover > /dev/null 2>&1 \
+; then
 	HAVE_GO_TEST_COVER=1
 fi