Corrade adds /wd*** warning disablements to "clang.exe" on windows. about corrade

[mosra]

What a cursed issue you got into, heh... wasn't even aware of such distinction. Going with _FRONTEND_VARIANT seems to be the way, yes, but looking at https://discourse.cmake.org/t/clang-on-windows-detected-with-msvc-interface/3470/9 linked from there it seems it won't be that simple and likely more changes will be needed to get non-CL Clang fully working 😅

Once you make this work, could you open a PR with the necessary changes to UseCorrade? Ideally it would do the detection correctly just once at the top:

corrade/modules/UseCorrade.cmake

Lines 41 to 49 in e6b4d95

	if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
	set(CORRADE_TARGET_CLANG 1)
	if(CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
	set(CORRADE_TARGET_CLANG_CL 1)
	set(CORRADE_TARGET_MSVC 1)
	else()
	set(CORRADE_TARGET_GCC 1)
	endif()
	endif()

and then use the CORRADE_TARGET_ defines from there onwards, instead of repeating complex checks for CMAKE_CXX_COMPILER_ID etc. Thanks in advance! 👍