Fix some errors

Signed-off-by: Alexander Batashev <[email protected]>

Author: Alexander Batashev

sycl/include/CL/sycl/detail/export.hpp

@@ -25,14 +25,18 @@
 #else
 #define __SYCL_EXPORT __declspec(dllimport)
 #define __SYCL_EXPORT_DEPRECATED(x) __declspec(dllimport, deprecated(x))
-#endif
-#else
+#endif //__SYCL_BUILD_SYCL_DLL
+#else // _WIN32
 
 #define DLL_LOCAL __attribute__((visibility("hidden")))
 
 #define __SYCL_EXPORT __attribute__((visibility("default")))
 #define __SYCL_EXPORT_DEPRECATED(x)                                            \
   __attribute__((visibility("default"), deprecated(x)))
+#endif // _WIN32
+#endif // __SYCL_EXPORT
+#else
+#ifndef __SYCL_EXPORT
+#define __SYCL_EXPORT
 #endif
-#endif
-#endif
+#endif // __SYCL_DEVICE_ONLY__