Fix useless intersection and not properly working property

Author: danieldk

build2cmake/src/templates/cuda/kernel.cmake

@@ -54,11 +54,13 @@ elseif(GPU_LANG STREQUAL "HIP")
 
   foreach(_KERNEL_SRC {{'${' + kernel_name + '_SRC}'}})
     if(_KERNEL_SRC MATCHES ".*\\.hip$")
-      set_property(
-        SOURCE ${_KERNEL_SRC}
-        PROPERTY
-        HIP_ARCHITECTURES {{ '${' + kernel_name + '_ARCHS}'}}
-      )
+      foreach(_ROCM_ARCH {{ '${' + kernel_name + '_ARCHS}'}})
+        set_property(
+          SOURCE ${_KERNEL_SRC}
+          APPEND PROPERTY
+          COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:HIP>:--offload-arch=${_ROCM_ARCH}>"
+        )
+      endforeach()
     endif()
   endforeach()
 

build2cmake/src/templates/cuda/preamble.cmake

@@ -85,9 +85,8 @@ if(GPU_LANG STREQUAL "CUDA")
 
   add_compile_definitions(CUDA_KERNEL)
 elseif(GPU_LANG STREQUAL "HIP")
-  set(ROCM_ARCHS "${HIP_SUPPORTED_ARCHS}")
   override_gpu_arches(GPU_ARCHES HIP ${HIP_SUPPORTED_ARCHS})
-  hip_archs_loose_intersection(ROCM_ARCHS, "${HIP_SUPPORTED_ARCHS}" "${ROCM_ARCHS}")
+  set(ROCM_ARCHS ${GPU_ARCHES})
   message(STATUS "ROCM supported target architectures: ${ROCM_ARCHS}")
 
   add_compile_definitions(ROCM_KERNEL)