Remove multiple definition of INP_DLLEXPORT (#1095)

Author: Alexander-Makaryev

dpnp/backend/include/dpnp_iface_fft.hpp

@@ -39,16 +39,6 @@
 #ifndef BACKEND_IFACE_FFT_H // Cython compatibility
 #define BACKEND_IFACE_FFT_H
 
-// #include <cstdint>
-
-// TODO needs to move into common place like backend_defs.hpp
-#ifdef _WIN32
-#define INP_DLLEXPORT __declspec(dllexport)
-#else
-#define INP_DLLEXPORT
-#endif
-
-// TODO needs to move into common place like backend_defs.hpp
 /**
  * @defgroup BACKEND_FFT_API Backend C++ library interface FFT API
  * @{

dpnp/backend/include/dpnp_iface_random.hpp

@@ -39,12 +39,6 @@
 #ifndef BACKEND_IFACE_RANDOM_H // Cython compatibility
 #define BACKEND_IFACE_RANDOM_H
 
-#ifdef _WIN32
-#define INP_DLLEXPORT __declspec(dllexport)
-#else
-#define INP_DLLEXPORT
-#endif
-
 /**
  * @defgroup BACKEND_RANDOM_API Backend C++ library interface RANDOM API
  * @{

dpnp/backend/src/constants.hpp

@@ -27,11 +27,7 @@
 #ifndef CONSTANTS_H // Cython compatibility
 #define CONSTANTS_H
 
-#ifdef _WIN32
-#define INP_DLLEXPORT __declspec(dllexport)
-#else
-#define INP_DLLEXPORT
-#endif
+#include "dpnp_iface.hpp"
 
 /**
  * This is container for the constants from Python interpreter and other modules. These constants are subject to use