[clang] [SYCL] SYCL host kernel launch support for the sycl_kernel_entry_point attribute. (PR #152403)

[Tom Honermann via cfe-commits]

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@@ -15,6 +15,10 @@
 #--- pch.h
 template<int> struct KN;
 
+// A generic kernel launch function.
+template<typename KN, typename... Ts>
+void sycl_kernel_launch(const char *, Ts...) {}
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tahonermann wrote:

The SYCL RT implementation will provide these declarations. For most tests, no implementation is required (this declaration could have omitted the function body).

https://github.com/llvm/llvm-project/pull/152403