DPC++ link error workaround. (#4192)

* DPC++ link error workaround.

OpenVINO C++ program failed to link when DPC++ compiler is used.
'make_shared_blob' causes 'unresolved external symbol' error on linking.
Commented out some __clang__ specific directives to workaround the issue in "ie_blob.h".

* DPC++ compatibility issue fix #2

1. Removed type-by-type template class definition for __clang__.
2. Modified TBlob() destructor. The 'unresolved reference' error occur again if I left 'virtual ~TBlob();' only. It seems it needs to be 'virtual ~TBlob() {};'.

* DPC++ compatibility fix #3 - Add DPC++ conditional code

Uses '__SYCL_COMPILER_VERSION' predefined macro to check if the compiler is a DPC++ or not.
Added conditional directive to switch code based of the detected compiler.
NOTE: User program must include <CL/sycl.hpp>, or the '__SYCL_COMPILER_VERSION' macro won't be defined and this fix won't take effect.

* DPC++ compatibility issue fix #4

Changed from #ifdef to #if + logical formulas.

* DPC++ compatibility issue fix #5

Added compiler check logic in src/ie_rtti.cpp

* DPC++ Compatibility issue #6 - ie_parameter.cpp

Added compiler check macro for DPC++ to ie_parameter.cpp as well.

Co-authored-by: Yasunori Shimura <yasunori.shimura@intel.com>

inference-engine/include/ie_blob.h

@@ -577,13 +577,14 @@ public:
     /**
      *@brief Virtual destructor.
      */
-#ifdef __clang__
+
+#if defined(__clang__) && !defined(__SYCL_COMPILER_VERSION)
     virtual ~TBlob();
 #else
     virtual ~TBlob() {
         free();
     }
-#endif  // __clang__
+#endif  // __clang__ && !__SYCL_COMPILER_VERSION
 
     /**
      * @brief Gets the size of the given type.
@@ -806,7 +807,7 @@ protected:
     }
 };
 
-#ifdef __clang__
+#if defined(__clang__) && !defined(__SYCL_COMPILER_VERSION)
 extern template class INFERENCE_ENGINE_API_CLASS(InferenceEngine::TBlob<float>);
 extern template class INFERENCE_ENGINE_API_CLASS(InferenceEngine::TBlob<double>);
 extern template class INFERENCE_ENGINE_API_CLASS(InferenceEngine::TBlob<int8_t>);
@@ -819,7 +820,7 @@ extern template class INFERENCE_ENGINE_API_CLASS(InferenceEngine::TBlob<long>);
 extern template class INFERENCE_ENGINE_API_CLASS(InferenceEngine::TBlob<long long>);
 extern template class INFERENCE_ENGINE_API_CLASS(InferenceEngine::TBlob<unsigned long>);
 extern template class INFERENCE_ENGINE_API_CLASS(InferenceEngine::TBlob<unsigned long long>);
-#endif  // __clang__
+#endif  // __clang__ && !__SYCL_COMPILER_VERSION
 
 /**
  * @brief Creates a blob with the given tensor descriptor.

inference-engine/include/ie_parameter.hpp

@@ -265,11 +265,11 @@ private:
     struct HasOperatorEqual : CheckOperatorEqual<T, EqualTo>::type {};
 
     struct Any {
-#ifdef __clang__
+#if defined(__clang__) && !defined(__SYCL_COMPILER_VERSION)
         virtual ~Any();
 #else
         virtual ~Any() = default;
-#endif
+#endif  // __clang__ && !__SYCL_COMPILER_VERSION
         virtual bool is(const std::type_info&) const = 0;
         virtual Any* copy() const = 0;
         virtual bool operator==(const Any& rhs) const = 0;
@@ -326,7 +326,7 @@ private:
     Any* ptr = nullptr;
 };
 
-#ifdef __clang__
+#if defined(__clang__) && !defined(__SYCL_COMPILER_VERSION)
 extern template struct INFERENCE_ENGINE_API_CLASS(InferenceEngine::Parameter::RealData<InferenceEngine::Blob::Ptr>);
 extern template struct INFERENCE_ENGINE_API_CLASS(InferenceEngine::Parameter::RealData<int>);
 extern template struct INFERENCE_ENGINE_API_CLASS(InferenceEngine::Parameter::RealData<bool>);
@@ -341,6 +341,6 @@ extern template struct INFERENCE_ENGINE_API_CLASS(
     InferenceEngine::Parameter::RealData<std::tuple<unsigned int, unsigned int>>);
 extern template struct INFERENCE_ENGINE_API_CLASS(
     InferenceEngine::Parameter::RealData<std::tuple<unsigned int, unsigned int, unsigned int>>);
-#endif  // __clang__
+#endif  // __clang__ && !__SYCL_COMPILER_VERSION
 
 }  // namespace InferenceEngine

inference-engine/src/inference_engine/ie_rtti.cpp

@@ -81,7 +81,7 @@ Parameter::~Parameter() {
     clear();
 }
 
-#ifdef __clang__
+#if defined(__clang__) && !defined(__SYCL_COMPILER_VERSION)
 Parameter::Any::~Any() {}
 
 template struct InferenceEngine::Parameter::RealData<int>;
@@ -97,12 +97,12 @@ template struct InferenceEngine::Parameter::RealData<std::vector<unsigned long>>
 template struct InferenceEngine::Parameter::RealData<std::tuple<unsigned int, unsigned int>>;
 template struct InferenceEngine::Parameter::RealData<std::tuple<unsigned int, unsigned int, unsigned int>>;
 template struct InferenceEngine::Parameter::RealData<InferenceEngine::Blob::Ptr>;
-#endif  // __clang__
+#endif  // __clang__ && !__SYCL_COMPILER_VERSION
 //
 // ie_blob.h
 //
 
-#ifdef __clang__
+#if defined(__clang__) && !defined(__SYCL_COMPILER_VERSION)
 template <typename T, typename U>
 TBlob<T, U>::~TBlob() {
     free();
@@ -120,4 +120,4 @@ template class InferenceEngine::TBlob<long>;
 template class InferenceEngine::TBlob<long long>;
 template class InferenceEngine::TBlob<unsigned long>;
 template class InferenceEngine::TBlob<unsigned long long>;
-#endif  // __clang__
+#endif  // __clang__ && !__SYCL_COMPILER_VERSION