An OpenCL program I originally wrote for an AMD GPU (RX 570) fails the runtime compilation on the Nvidia card (RTX 3060, latest drivers) with the message <kernel>:28:5: error: use of unknown builtin '__builtin_mul_overflow'.
Through the preprocessor macros I found the OpenCL code now gets compiled with Clang 3.4. According to the documentation, this version did not yet support __builtin_mul_overflow(), which was introduced in Clang 3.8.
Is it possible to specify OpenCL to use a newer Clang version? Or are the latest Nvidia drivers indeed limited to such an old compiler?
Unfortunately you can't control which compiler the OpenCL driver uses. You could try conditionally compiling the code to account for different compilers, but that's about it.