3.18.3 AMD GCN Options

These options are defined specifically for the AMD GCN port.

-march= gpu
-mtune= gpu
Set architecture type or tuning for gpu . Supported values for gpu are
Compile for GCN3 Fiji devices (gfx803).
Compile for GCN5 Vega 10 devices (gfx900).

-mstack-size= bytes
Specify how many bytes of stack space will be requested for each GPU thread (wave-front). Beware that there may be many threads and limited memory available. The size of the stack allocation may also have an impact on run-time performance. The default is 32KB when using OpenACC or OpenMP, and 1MB otherwise.