Added MKL_ILP64 flag to dpct_helper_add_mkl_to_target macro

Author: TejaX-Alaghari

clang/tools/dpct/cmake/dpct.cmake

@@ -99,11 +99,13 @@ endif()
 
 # Link MKL library to target
 macro(DPCT_HELPER_ADD_MKL_TO_TARGET target)
-    if(WIN32)
-        target_link_libraries(${target} mkl_sycl_dll.lib mkl_intel_ilp64_dll.lib mkl_tbb_thread_dll.lib mkl_core_dll.lib OpenCL.lib)
-    elseif(UNIX AND NOT APPLE)
-        target_link_libraries(${target} -L${MKLROOT}/lib/intel64 -lmkl_intel_ilp64 -lmkl_tbb_thread -lmkl_core -lOpenCL -lmkl_sycl -lpthread -ldl)
-    else()
-        message(FATAL_ERROR "Unsupported platform")
-    endif()
+  set(MKL_ILP64 TRUE)
+  
+  if(WIN32)
+    target_link_libraries(${target} mkl_sycl_dll.lib mkl_intel_ilp64_dll.lib mkl_tbb_thread_dll.lib mkl_core_dll.lib OpenCL.lib)
+  elseif(UNIX AND NOT APPLE)
+    target_link_libraries(${target} -L${MKLROOT}/lib/intel64 -lmkl_intel_ilp64 -lmkl_tbb_thread -lmkl_core -lOpenCL -lmkl_sycl -lpthread -ldl)
+  else()
+    message(FATAL_ERROR "Unsupported platform")
+  endif()
 endmacro()