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Original behaviour would unconditionally enable WinRT for all projects so source file flag generation code can acknowledge WinRT being present and disable it for C language source files. An unintentional result of that approach is that WinRT is enabled for ALL projects, including C++ projects/source files with no way to disable it Instead use `CMAKE_VS_WINRT_BY_DEFAULT` as a hint that the platform is WinRT-by-default and set global `CompileAsWinRT` flag to `false` unless it was explicitly requested by either `WINRT_COMPONENT` option or `/ZW` compilation option - similar to what Windows Phone/Windows Store platform logic does In case WinRT compilation is enabled for a project by either of aforementioned methods, C language source file override logic will still kick in and disable CompileAsWinRT for C source files Fixes: #20063
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788 B
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19 lines
788 B
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CMAKE_VS_WINRT_BY_DEFAULT
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Inform :ref:`Visual Studio Generators` for VS 2010 and above that the
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target platform enables WinRT compilation by default and it needs to
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be explicitly disabled if ``/ZW`` or :prop_tgt:`VS_WINRT_COMPONENT` is
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omitted (as opposed to enabling it when either of those options is
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present)
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This makes cmake configuration consistent in terms of WinRT among
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platforms - if you did not enable the WinRT compilation explicitly, it
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will be disabled (by either not enabling it or explicitly disabling it)
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Note: WinRT compilation is always explicitly disabled for C language
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source files, even if it is expliclty enabled for a project
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This variable is meant to be set by a
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:variable:`toolchain file <CMAKE_TOOLCHAIN_FILE>` for such platforms.
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