Index: clang/lib/Driver/Types.cpp
===================================================================
--- clang/lib/Driver/Types.cpp
+++ clang/lib/Driver/Types.cpp
@@ -295,7 +295,10 @@
         strcmp(Name, getInfo(Id).Name) == 0)
       return Id;
   }
-
+  // Accept "cu" as an alias for "cuda" for NVCC compatibility
+  if (strcmp(Name, "cu") == 0) {
+    return types::TY_CUDA;
+  }
   return TY_INVALID;
 }
 
Index: clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
===================================================================
--- clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
+++ clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
@@ -114,6 +114,9 @@
   case types::TY_ObjCXX:
   case types::TY_ObjCXXHeader:
     return types::TY_ObjCXX;
+  case types::TY_CUDA:
+  case types::TY_CUDA_DEVICE:
+    return types::TY_CUDA:
   default:
     return types::TY_INVALID;
   }