When building with CUDA 12.8+ enable blackwell support (dmlc#11187)

Author: robertmaynard

cmake/Utils.cmake

@@ -55,7 +55,9 @@ function(compute_cmake_cuda_archs archs)
 
   # Set up defaults based on CUDA varsion
   if(NOT CMAKE_CUDA_ARCHITECTURES)
-    if(CUDA_VERSION VERSION_GREATER_EQUAL "11.8")
+    if(CUDA_VERSION VERSION_GREATER_EQUAL "12.8")
+      set(CMAKE_CUDA_ARCHITECTURES 50 60 70 80 90 100 120)
+    elseif(CUDA_VERSION VERSION_GREATER_EQUAL "11.8")
       set(CMAKE_CUDA_ARCHITECTURES 50 60 70 80 90)
     elseif(CUDA_VERSION VERSION_GREATER_EQUAL "11.0")
       set(CMAKE_CUDA_ARCHITECTURES 50 60 70 80)