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021a1f6974
If user specifies offload is disabled (e.g., OMP_TARGET_OFFLOAD=disable), disable library almost completely. This reduces resources spent to a minimum and ensures all APIs behave as if the only available device is the host device. Currently some of the APIs behave as if there were devices avaible for offload even when under OMP_TARGET_OFFLOAD=disable. --------- Co-authored-by: Joseph Huber <huberjn@outlook.com>