[LIBXGBOOST] pass demo running.

src/tree/param.h

@@ -71,7 +71,7 @@ struct TrainParam : public dmlc::Parameter<TrainParam> {
         .describe("L2 regularization on leaf weight");
     DMLC_DECLARE_FIELD(reg_alpha).set_lower_bound(0.0f).set_default(0.0f)
         .describe("L1 regularization on leaf weight");
-    DMLC_DECLARE_FIELD(default_direction)
+    DMLC_DECLARE_FIELD(default_direction).set_default(0)
         .add_enum("learn", 0)
         .add_enum("left", 1)
         .add_enum("right", 2)

src/tree/tree_updater.cc

@@ -0,0 +1,35 @@
+/*!
+ * Copyright 2015 by Contributors
+ * \file tree_updater.cc
+ * \brief Registry of tree updaters.
+ */
+#include <xgboost/tree_updater.h>
+#include <dmlc/registry.h>
+
+namespace dmlc {
+DMLC_REGISTRY_ENABLE(::xgboost::TreeUpdaterReg);
+}  // namespace dmlc
+
+namespace xgboost {
+
+TreeUpdater* TreeUpdater::Create(const std::string& name) {
+  auto *e = ::dmlc::Registry< ::xgboost::TreeUpdaterReg>::Get()->Find(name);
+  if (e == nullptr) {
+    LOG(FATAL) << "Unknown tree updater " << name;
+  }
+  return (e->body)();
+}
+
+}  // namespace xgboost
+
+namespace xgboost {
+namespace tree {
+// List of files that will be force linked in static links.
+DMLC_REGISTRY_LINK_TAG(updater_colmaker);
+DMLC_REGISTRY_LINK_TAG(updater_skmaker);
+DMLC_REGISTRY_LINK_TAG(updater_refresh);
+DMLC_REGISTRY_LINK_TAG(updater_prune);
+DMLC_REGISTRY_LINK_TAG(updater_histmaker);
+DMLC_REGISTRY_LINK_TAG(updater_sync);
+}  // namespace tree
+}  // namespace xgboost

src/tree/updater_colmaker.cc

@@ -15,6 +15,9 @@
 
 namespace xgboost {
 namespace tree {
+
+DMLC_REGISTRY_FILE_TAG(updater_colmaker);
+
 /*! \brief column-wise update to construct a tree */
 template<typename TStats>
 class ColMaker: public TreeUpdater {
@@ -891,4 +894,3 @@ XGBOOST_REGISTER_TREE_UPDATER(DistColMaker, "distcol")
   });
 }  // namespace tree
 }  // namespace xgboost
-

src/tree/updater_histmaker.cc

@@ -15,6 +15,9 @@
 
 namespace xgboost {
 namespace tree {
+
+DMLC_REGISTRY_FILE_TAG(updater_histmaker);
+
 template<typename TStats>
 class HistMaker: public BaseMaker {
  public:

src/tree/updater_prune.cc

@@ -14,6 +14,9 @@
 
 namespace xgboost {
 namespace tree {
+
+DMLC_REGISTRY_FILE_TAG(updater_prune);
+
 /*! \brief pruner that prunes a tree after growing finishes */
 class TreePruner: public TreeUpdater {
  public:

src/tree/updater_refresh.cc

@@ -14,6 +14,9 @@
 
 namespace xgboost {
 namespace tree {
+
+DMLC_REGISTRY_FILE_TAG(updater_refresh);
+
 /*! \brief pruner that prunes a tree after growing finishs */
 template<typename TStats>
 class TreeRefresher: public TreeUpdater {

src/tree/updater_skmaker.cc

@@ -18,6 +18,8 @@
 namespace xgboost {
 namespace tree {
 
+DMLC_REGISTRY_FILE_TAG(updater_skmaker);
+
 class SketchMaker: public BaseMaker {
  public:
   void Update(const std::vector<bst_gpair> &gpair,
@@ -399,4 +401,3 @@ XGBOOST_REGISTER_TREE_UPDATER(SketchMaker, "grow_skmaker")
   });
 }  // namespace tree
 }  // namespace xgboost
-

src/tree/updater_sync.cc

@@ -12,6 +12,9 @@
 
 namespace xgboost {
 namespace tree {
+
+DMLC_REGISTRY_FILE_TAG(updater_sync);
+
 /*!
  * \brief syncher that synchronize the tree in all distributed nodes
  * can implement various strategies, so far it is always set to node 0's tree