Fix ODR violation due to const-mismatch between std gemm implementation and extern-c declaration.

Author: cptspacemanspiff

kernels/optimized/blas/CPUBlas.cpp

@@ -15,8 +15,8 @@
 #include <Accelerate/Accelerate.h>
 #else
 // clang-format off
-extern "C" void dgemm_(char *transa, char *transb, int *m, int *n, int *k, double *alpha, const double *a, int *lda, const double *b, int *ldb, double *beta, double *c, int *ldc);
-extern "C" void sgemm_(char *transa, char *transb, int *m, int *n, int *k, float *alpha, const float *a, int *lda, const float *b, int *ldb, float *beta, float *c, int *ldc);
+extern "C" void dgemm_(const char *transa, const char *transb, const int *m, const int *n, const int *k, const double *alpha, const double *a, const int *lda, const double *b, const int *ldb, const double *beta, double *c, const int *ldc);
+extern "C" void sgemm_(const char *transa, const char *transb, const int *m, const int *n, const int *k, const float *alpha, const float *a,const  int *lda, const float *b,const int *ldb, const float *beta, float *c, const int *ldc);
 // clang-format on
 #endif // ET_BUILD_FOR_APPLE
 #endif // ET_BUILD_WITH_BLAS