SEH from boost::asio win_mutex.ipp not compatible with clang SYCL

[101001000]

Windows uses SEH for some exception handling. \boost\asio\detail\impl\win_mutex.ipp and \boost\asio\detail\impl\win_static_mutex.ipp has a __try statement which is not compatible with the sycl clang build.

It's possible to replace those "__try" statements with "try" and it will work, even if I don't really know the consequences.

[101001000]

Apparently, I need to use clang-cl for compilation to be SEH compatible on Windows.

I was not able to compile with clang-cl Boost::json, the Boost::json CMakeLists is not able to find "compiler features" for Clang (neither 16.0 or 15.0)

[101001000]

CMake was not able to find compile features when adding "-fsycl" tag.

A quick patch I did in commit 7b20b5e was to add the needed features by myself with:

set(CMAKE_CXX_COMPILE_FEATURES cxx_constexpr cxx_std_11 cxx_alias_templates cxx_variadic_templates cxx_decltype)

in the CMakeLists.txt file

[101001000]

Fixed forking Boost::asio repo and commenting the __try and __except blocks

[101001000]

I think this maybe could be solved with this flag: /EHsc