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diff --git a/thirdparty/oidn/mkl-dnn/src/cpu/gemm/os_blas.hpp b/thirdparty/oidn/mkl-dnn/src/cpu/gemm/os_blas.hpp
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+++ b/thirdparty/oidn/mkl-dnn/src/cpu/gemm/os_blas.hpp
@@ -0,0 +1,86 @@
+/*******************************************************************************
+* Copyright 2017-2018 Intel Corporation
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*******************************************************************************/
+
+#ifndef OS_BLAS_HPP
+#define OS_BLAS_HPP
+
+/** \file
+ * Common stuff respecting USE_MKL and USE_CBLAS compile flags
+ *
+ *  USE_MKL  USE_CBLAS effect
+ *  -------  --------- ------
+ *  yes      yes       normal compile: jit *may* be preferred over Intel(R) MKL CBLAS
+ *  yes      no        jit calls OK; assert if cblas is ever called
+ *  no       yes       system-dependent CBLAS
+ *  no       no        gemm convolution (or other blas) N/A; create stubs
+ */
+
+#if defined(USE_MKL)
+
+#include "mkl_version.h"
+
+#define USE_MKL_PACKED_GEMM (INTEL_MKL_VERSION >= 20190001)
+#define USE_MKL_IGEMM \
+    (INTEL_MKL_VERSION >= 20180000 && __INTEL_MKL_BUILD_DATE >= 20170628)
+
+#include "mkl_cblas.h"
+#if !defined(USE_CBLAS)
+#define cblas_sgemm(...) assert(!"CBLAS is unavailable")
+#endif
+
+#else /* defined(USE_MKL) */
+
+#define USE_MKL_PACKED_GEMM 0
+#define USE_MKL_IGEMM 0
+
+#if defined(_SX)
+/* TODO: _SX should also define USE_CBLAS in case the later is available */
+extern "C" {
+#include "cblas.h" // CHECK: does SX also have a fortran API sgemm?
+}
+
+#elif defined(USE_CBLAS)
+#include "cblas.h" // Maybe a system/cmake cblas works for you?
+#else
+/* put the stubs to make a code compilable but not workable */
+#define cblas_sgemm(...) assert(!"CBLAS is unavailable")
+#endif /* defined(_SX) */
+
+#endif /* defined(USE_MKL) */
+
+namespace mkldnn {
+namespace impl {
+namespace cpu {
+
+#if defined(USE_MKL) && defined(USE_CBLAS)
+typedef MKL_INT cblas_int;
+
+#elif defined(USE_CBLAS)
+typedef int cblas_int;
+
+#if defined(_SX)
+/* this cblas.h is peculiar... */
+typedef CBLAS_ORDER CBLAS_LAYOUT;
+#endif
+#endif
+
+}
+}
+}
+
+#endif /* OS_BLAS_HPP */
+
+// vim: et ts=4 sw=4 cindent cino^=l0,\:0,N-s