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-rw-r--r--util/msrtool/darwin.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/util/msrtool/darwin.c b/util/msrtool/darwin.c
index dc0c3d6cee..4d8ad2e04f 100644
--- a/util/msrtool/darwin.c
+++ b/util/msrtool/darwin.c
@@ -26,6 +26,10 @@
#include "msrtool.h"
+/* This Darwin support requires DirectIO, which is available at
+ * http://www.coresystems.de/en/directio
+ */
+
int darwin_probe(const struct sysdef *system)
{
#ifdef __DARWIN__