fix build errors due to new gcc compiler (5.x from ubuntu 16.4.1)

Source/Math/CPUSparseMatrix.cpp

@@ -347,7 +347,7 @@ CPUSparseMatrix<ElemType>& CPUSparseMatrix<ElemType>::DoGatherColumnsOf(ElemType
     for (long j = 0; j < numCols; j++)
     {
         auto jInF = idx(0, j); // this is the column we need to get
-        if (::isnan(jInF) || (jInF < 0))     // negative index means gap
+        if (std::isnan(jInF) || (jInF < 0))     // negative index means gap
             continue;
         size_t jIn = (size_t)jInF;
 
@@ -364,7 +364,7 @@ CPUSparseMatrix<ElemType>& CPUSparseMatrix<ElemType>::DoGatherColumnsOf(ElemType
     for (long j = 0; j < numCols; j++)
     {
         auto jInF = idx(0, j); // this is the column we need to get
-        if (::isnan(jInF) || (jInF < 0))     // negative index means gap
+        if (std::isnan(jInF) || (jInF < 0))     // negative index means gap
             continue;
         size_t jIn = (size_t)jInF;
 
@@ -411,7 +411,7 @@ CPUSparseMatrix<ElemType>& CPUSparseMatrix<ElemType>::DoScatterColumnsOf(ElemTyp
     for (long j = 0; j < numColsToWrite; j++)
     {
         auto jOutF = idx(0, j); // this is the column we need to write to
-        if (::isnan(jOutF) || (jOutF < 0))     // negative index means gap
+        if (std::isnan(jOutF) || (jOutF < 0))     // negative index means gap
             continue;
         size_t jOut = (size_t)jOutF;
         columnElementCounts[jOut] = a.SecondaryIndexLocation()[j + 1] - a.SecondaryIndexLocation()[j];
@@ -426,7 +426,7 @@ CPUSparseMatrix<ElemType>& CPUSparseMatrix<ElemType>::DoScatterColumnsOf(ElemTyp
     for (long j = 0; j < numColsToWrite; j++)
     {
         auto jOutF = idx(0, j); // this is the column we need to write to
-        if (::isnan(jOutF) || (jOutF < 0))     // negative index means gap
+        if (std::isnan(jOutF) || (jOutF < 0))     // negative index means gap
             continue;
         size_t jOut = (size_t)jOutF;
 

Source/Readers/ReaderLib/ElementTypeUtils.h

@@ -19,7 +19,7 @@ inline size_t GetSizeByType(ElementType type)
     case ElementType::tdouble:
         return sizeof(double);
     default:
-        RuntimeError("Unsupported type '%d'", type);
+        RuntimeError("Unsupported type '%d'", (int)type);
     }
 }