From c7d53aecc39f058e0b3fed7716649838b0f5dadb Mon Sep 17 00:00:00 2001
From: tqchen <tianqi.tchen@gmail.com>
Date: Sun, 28 Feb 2016 09:44:11 -0800
Subject: [PATCH] add link tag

---
 include/rabit/c_api.h | 11 +++++++++++
 src/c_api.cc          |  4 ++++
 2 files changed, 15 insertions(+)

diff --git a/include/rabit/c_api.h b/include/rabit/c_api.h
index a4a4dc70d..a2a2a9706 100644
--- a/include/rabit/c_api.h
+++ b/include/rabit/c_api.h
@@ -132,4 +132,15 @@ RABIT_DLL void RabitCheckPoint(const char *global_model,
  */
 RABIT_DLL int RabitVersionNumber();
 
+
+/*!
+ * \brief a Dummy function,
+ *  used to cause force link of C API  into the  DLL.
+ * \code
+ * // force link rabit C API library.
+ * static int must_link_rabit_ = RabitLinkTag();
+ * \endcode
+ */
+RABIT_DLL int RabitLinkTag();
+
 #endif  // RABIT_C_API_H_
diff --git a/src/c_api.cc b/src/c_api.cc
index c268fea72..14f176222 100644
--- a/src/c_api.cc
+++ b/src/c_api.cc
@@ -257,3 +257,7 @@ void RabitCheckPoint(const char *global_model,
 int RabitVersionNumber() {
   return rabit::VersionNumber();
 }
+
+int RabitLinkTag() {
+  return 0;
+}