Intel GPU: Enable SYCL building system #1671
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SYCL is the programming solution dominated by Intel. SYCL has been adopted widely to enable compute kernels for Intel GPUs, such as PyTorch. CUDA has been a supported language in CMAKE, e.g. enable_langauge(CUDA). Unlike CUDA, SYCL requires more CMAKE codes to enable building system. The SYCL building system in the commit is the general part ported from PyTorch.
Usage:
BUILD_TEST_SYCL is an option for testing SYCL building system.