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[sonkanit]

I am not sure if it's because of my 10.3b driver. I can't update the driver on my laptop.

When I use printf in cl program, the compiler says "error: printf declared implicitly"

Any sugguestions? Thanks

[LeeHowes]

I don't think printf is supported at the moment is it?

[sonkanit]

It was supported on CPU device and on 2.0.1.

Anyone please check if it is still working on 2.1?

[LeeHowes]

Right, I've done some badgering. Apparently to ensure clean standard support, as the printf support is not a standard feature of OpenCL, as of 2.1 you have to enable it as an extension. Put the following in your cl code:

#pragma OPENCL EXTENSION cl_amd_printf : enable

[sonkanit]

Thank you very much LeeHowes. I supposed this is also written somewhere in the document. All my fault.

[LeeHowes]

No problem. Normal people don't read release notes any more than we read user manuals, so it's not surprising