fix build errors on centos (#1436)

src/ngraph/runtime/cpu/cpu_tensor_view.hpp

@@ -21,6 +21,9 @@
 #include "ngraph/runtime/tensor_view.hpp"
 #include "ngraph/type/element_type.hpp"
 
+// This define is a workaround for gcc on centos and is required for aligned()
+#define NGRAPH_CPU_ALIGNMENT 64
+
 namespace ngraph
 {
     namespace runtime
@@ -57,7 +60,7 @@ namespace ngraph
                 /// @param n Number of bytes to read, must be integral number of elements.
                 void read(void* p, size_t tensor_offset, size_t n) const override;
 
-                static constexpr size_t BufferAlignment = 64;
+                static constexpr int BufferAlignment = NGRAPH_CPU_ALIGNMENT;
 
             private:
                 char* buffer;

src/ngraph/runtime/cpu/kernel/reduce_function.hpp

@@ -55,9 +55,9 @@ namespace ngraph
                     void reduce(const ElementType v, ElementType* R)
                     {
                         TensorViewPtrs inputs, outputs;
-                        ElementType p __attribute__((aligned(CPUTensorView::BufferAlignment))) = v;
-                        ElementType q __attribute__((aligned(CPUTensorView::BufferAlignment))) = *R;
-                        ElementType r __attribute__((aligned(CPUTensorView::BufferAlignment)));
+                        ElementType p __attribute__((aligned(NGRAPH_CPU_ALIGNMENT))) = v;
+                        ElementType q __attribute__((aligned(NGRAPH_CPU_ALIGNMENT))) = *R;
+                        ElementType r __attribute__((aligned(NGRAPH_CPU_ALIGNMENT)));
 
                         inputs.emplace_back(backend->create_tensor(
                             ngraph::element::from<ElementType>(), Shape{}, &p));

src/ngraph/runtime/cpu/kernel/reduce_function_window.hpp

@@ -46,9 +46,9 @@ namespace ngraph
                     auto reducer = [&](ElementType a, ElementType b) {
                         TensorViewPtrs inputs, outputs;
 
-                        ElementType p __attribute__((aligned(CPUTensorView::BufferAlignment))) = a;
-                        ElementType q __attribute__((aligned(CPUTensorView::BufferAlignment))) = b;
-                        ElementType r __attribute__((aligned(CPUTensorView::BufferAlignment)));
+                        ElementType p __attribute__((aligned(NGRAPH_CPU_ALIGNMENT))) = a;
+                        ElementType q __attribute__((aligned(NGRAPH_CPU_ALIGNMENT))) = b;
+                        ElementType r __attribute__((aligned(NGRAPH_CPU_ALIGNMENT)));
 
                         inputs.emplace_back(backend->create_tensor(
                             ngraph::element::from<ElementType>(), Shape{}, &p));