Refactor SYCL Build Flags

[chunhuanMeng]

SYCL Build Flag Updates

Added SYCL Target Options for Kernel Compilation

Included -fsycl-targets=spir64_gen,spir64 in SYCL_KERNEL_OPTIONS to explicitly specify SYCL targets during kernel compilation, regardless of whether AOT (Ahead-of-Time) compilation is enabled.

Refactored SYCL Flags for Device Linking

Consolidated device linking flags into SYCL_LINK_FLAGS instead of using SYCL_FLAGS, ensuring proper flag usage during the device linking stage.

Removed Redundant SYCL Target Options in AOT Compilation

Eliminated duplicate definitions of SYCL_TARGETS_OPTION and its inclusion in SYCL_KERNEL_OPTIONS under the AOT compilation path to avoid redundancy.

[Copilot]

Pull Request Overview

This PR enhances SYCL build configuration by explicitly specifying compilation targets, refactoring link flags, and removing redundant Ahead-of-Time (AOT) options.

• Add -fsycl-targets=spir64_gen,spir64 to kernel compilation flags
• Use a dedicated SYCL_LINK_FLAGS for device linking instead of SYCL_FLAGS
• Remove duplicate target-option definitions in the AOT branch

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
cmake/Modules/FindSYCL.cmake	Swapped out SYCL_FLAGS for SYCL_LINK_FLAGS in SYCL_link_device_objects
cmake/BuildFlags.cmake	Introduced SYCL_TARGETS_OPTION, updated SYCL_KERNEL_OPTIONS and SYCL_FLAGS, and cleaned up AOT-specific duplication

Comments suppressed due to low confidence (2)

cmake/BuildFlags.cmake:75

• [nitpick] The variable name SYCL_TARGETS_OPTION is singular but holds multiple targets. Renaming it to SYCL_TARGETS_OPTIONS could improve clarity and consistency.

  set(SYCL_TARGETS_OPTION -fsycl-targets=spir64_gen,spir64)

cmake/Modules/FindSYCL.cmake:386

• SYCL_LINK_FLAGS is referenced here but not defined in BuildFlags.cmake. Consider initializing or defining SYCL_LINK_FLAGS before use to ensure device linking flags are correctly applied.

        ${SYCL_LINK_FLAGS}