[clang] [llvm] [Driver][SYCL] Add initial SYCL offload compilation support (PR #107493)

[Tom Honermann via cfe-commits]

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@@ -6774,16 +6775,20 @@ defm : FlangIgnoredDiagOpt<"frontend-loop-interchange">;
 defm : FlangIgnoredDiagOpt<"target-lifetime">;
 
 // C++ SYCL options
+let Group = sycl_Group in {
 def fsycl : Flag<["-"], "fsycl">,
-  Visibility<[ClangOption, CLOption]>,
-  Group<sycl_Group>, HelpText<"Enables SYCL kernels compilation for device">;
+  HelpText<"Enables SYCL kernels compilation for device">;
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tahonermann wrote:

The existing help text could use some improvement,. How about simply "Enable SYCL C++ extensions" (and "Disable SYCL C++ extensions" for `-fno-sycl` below)?

https://github.com/llvm/llvm-project/pull/107493