[LIBXGBOOST] pass demo running.

src/metric/elementwise_metric.cc

@@ -5,12 +5,16 @@
  * \author Kailong Chen, Tianqi Chen
  */
 #include <xgboost/metric.h>
+#include <dmlc/registry.h>
 #include <cmath>
 #include "../common/math.h"
 #include "../common/sync.h"
 
 namespace xgboost {
 namespace metric {
+// tag the this file, used by force static link later.
+DMLC_REGISTRY_FILE_TAG(elementwise_metric);
+
 /*!
  * \brief base class of element-wise evaluation
  * \tparam Derived the name of subclass
@@ -124,4 +128,3 @@ XGBOOST_REGISTER_METRIC(PossionNegLoglik, "poisson-nloglik")
 
 }  // namespace metric
 }  // namespace xgboost
-

src/metric/metric.cc

@@ -0,0 +1,42 @@
+/*!
+ * Copyright 2015 by Contributors
+ * \file metric_registry.cc
+ * \brief Registry of objective functions.
+ */
+#include <xgboost/metric.h>
+#include <dmlc/registry.h>
+
+namespace dmlc {
+DMLC_REGISTRY_ENABLE(::xgboost::MetricReg);
+}
+
+namespace xgboost {
+Metric* Metric::Create(const std::string& name) {
+  std::string buf = name;
+  std::string prefix = name;
+  auto pos = buf.find('@');
+  if (pos == std::string::npos) {
+    auto *e = ::dmlc::Registry< ::xgboost::MetricReg>::Get()->Find(name);
+    if (e == nullptr) {
+      LOG(FATAL) << "Unknown metric function " << name;
+    }
+    return (e->body)(nullptr);
+  } else {
+    std::string prefix = buf.substr(0, pos);
+    auto *e = ::dmlc::Registry< ::xgboost::MetricReg>::Get()->Find(prefix.c_str());
+    if (e == nullptr) {
+      LOG(FATAL) << "Unknown metric function " << name;
+    }
+    return (e->body)(buf.substr(pos + 1, buf.length()).c_str());
+  }
+}
+}  // namespace xgboost
+
+namespace xgboost {
+namespace metric {
+// List of files that will be force linked in static links.
+DMLC_REGISTRY_LINK_TAG(elementwise_metric);
+DMLC_REGISTRY_LINK_TAG(multiclass_metric);
+DMLC_REGISTRY_LINK_TAG(rank_metric);
+}  // namespace metric
+}  // namespace xgboost

src/metric/multiclass_metric.cc

@@ -11,6 +11,9 @@
 
 namespace xgboost {
 namespace metric {
+// tag the this file, used by force static link later.
+DMLC_REGISTRY_FILE_TAG(multiclass_metric);
+
 /*!
  * \brief base class of multi-class evaluation
  * \tparam Derived the name of subclass
@@ -114,4 +117,3 @@ XGBOOST_REGISTER_METRIC(MultiLogLoss, "mlogloss")
 .set_body([](const char* param) { return new EvalMultiLogLoss(); });
 }  // namespace metric
 }  // namespace xgboost
-

src/metric/rank_metric.cc

@@ -5,12 +5,16 @@
  * \author Kailong Chen, Tianqi Chen
  */
 #include <xgboost/metric.h>
+#include <dmlc/registry.h>
 #include <cmath>
 #include "../common/sync.h"
 #include "../common/math.h"
 
 namespace xgboost {
 namespace metric {
+// tag the this file, used by force static link later.
+DMLC_REGISTRY_FILE_TAG(rank_metric);
+
 /*! \brief AMS: also records best threshold */
 struct EvalAMS : public Metric {
  public: