fix a bug

paddle/math/MathFunctions.h

@@ -32,14 +32,9 @@ extern "C" {
 #include <lapacke.h>
 #endif
 
-#ifdef PADDLE_USE_REFERENCE_CBLAS
-extern "C" {
-#include <cblas.h>
-}
-#endif
-
 #ifndef LAPACK_FOUND
 extern "C" {
+#include <cblas.h>    
 int LAPACKE_sgetrf(int matrix_layout, int m, int n,
 int LAPACKE_dgetrf(int matrix_layout, int m, int n,
                    double* a, int lda, int* ipiv);
@@ -47,7 +42,7 @@ int LAPACKE_sgetri(int matrix_layout, int n, float* a,
                    int lda, const int* ipiv);
 int LAPACKE_dgetri(int matrix_layout, int n, double* a,
                    int lda, const int* ipiv);
-};
+}
 #endif
 
 #include <cmath>