remove extern "C"

source/tensor/function/Loss.h

@@ -47,21 +47,17 @@ loss function to measure the "number" of errors
 */
 
 /* compute the loss */
-extern "C"
 DTYPE _LossCompute(XTensor * gold, XTensor * output, LOSS_FUNCTION_NAME LFName,
                   bool isLogOutput, int leadDim, int gBeg, int gLen, int oBeg);
 
 /* compute the loss (log version) */
-extern "C"
 DTYPE _LossComputeForLogScale(XTensor * gold, XTensor * output, LOSS_FUNCTION_NAME LFName,
                              int leadDim, int gBeg, int gLen, int oBeg);
 
 /* backward compuation for a single element */
-extern "C"
 DTYPE _LossBackwardPoint(DTYPE t, DTYPE y, LOSS_FUNCTION_NAME LFName);
 
 /* backward compuation for (dense) vectors */
-extern "C"
 void _LossBackward(XTensor * dEdY, XTensor * t, XTensor * y, 
                   LOSS_FUNCTION_NAME LFName, 
                   int leadDim = -1, int tBeg = 0, int tLen = -1, int yBeg = 0);