check_cxx_source_compiles(
    "
    namespace madness {
      template <typename T>
      void mTxmq(long dimi, long dimj, long dimk,
		 T* __restrict__ c, const T* a, const T* b, long ldb=-1);

      template <>
      void mTxmq(long dimi, long dimj, long dimk, double* __restrict__ c, const  double* a, const double* b, long ldb);
    }
    int main() { double a[1], b[1], c[1]; madness::mTxmq(1,1,1,c,a,b,1); return 0; }
    " HAVE_MTXMQ)