[SYCL] How to link a pre-compiled device image?

[shixiyue]

I read the documentation about Dynamic linking of device code, which describe a scenario of using functions defined in a pre-compiled device image provided by the user.

May I know what are the compiler commands for this scenario? The documentation says that

user adds device image with definition of LibDeviceFunc to the fat object via special compiler option (like -fsycl-add-targets

But I don't understand how to do that in practice. Could you provide an example for the compilation command? Also, what if the pre-compiled device image is for an architecture different from the host's? Does the dynamic linking of device code still work in the case? Thank you!

[romanovvlad]

@shixiyue
As far as I know it is not supported yet. @AlexeySachkov Could you please comment?

[shixiyue]

Got it. Thank you!

[shixiyue]

@romanovvlad @AlexeySachkov Would there be any method to link a device library that is in native device binary? I got an error when I tried to link a library compiled for the device's architecture which is different from the host:
Relocations in generic ELF (EM: 243)
libDevice.a: error adding symbols: File in wrong format