[SYCL] Fix -nolibsycl and spurious spirv-link flags for SYCL offloading (#200252) Two related driver fixes for SYCL offloading on Linux: 1. Honor -nolibsycl during linking: the SYCL runtime library (libLLVMSYCL.so) was unconditionally added to the link line even when -nolibsycl was passed. The flag was recognized but silently ignored at the point where the library path is emitted. 2. Do not forward spirv-link flags to clang-sycl-linker: the driver was passing --allow-partial-linkage and --create-library to clang-sycl-linker for all SPIR-V offload targets, but these flags are only meaningful to the out-of-tree spirv-link tool used by OpenMP. SYCL uses clang-sycl-linker which does not accept them, causing a link failure. The flags are now restricted to non-SYCL SPIR-V offload kinds. --------- Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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