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Brad King
d50b31be35
Since commitd44c0db0b2(clang: setup correct configuration in gnu mode, 2019-02-20, v3.15.0-rc1~41^2~5) we support the GNU-like Clang that targets the MSVC ABI. However, Clang cannot compile with the MSVC standard library unless it runs in a mode aware of C++14 (since MSVC itself does not even have a lower mode). When `CMAKE_CXX_STANDARD` is set to 98 or 11, use C++14 anyway. Since Clang's default mode is aware of C++14, another option is to not add any flags for 98 or 11. However, if a future Clang version ever defaults to a higher C++ standard, setting the standard to 98 or 11 should at least not use a mode higher than 14. Also revert test updates from commit4819ff9647(Tests: fix failures with gnu mode clang on windows, 2019-03-21, v3.15.0-rc1~41^2~3) that were meant to work around the standard selection problem. Fixes: #19496
CMake Tests Directory ********************* This directory contains the CMake test suite. See also the `CMake Source Code Guide`_. .. _`CMake Source Code Guide`: ../Help/dev/source.rst Many tests exist as immediate subdirectories, but some tests are organized as follows. * ``CMakeLib/``: Source code, used for tests, that links to the ``CMakeLib`` library defined over in ``Source/``. * ``CMakeOnly/``: Deprecated. Tests that run CMake to generate a project but not build it. Superseded by ``Tests/RunCMake/``. * ``Find*/``: Tests for specific find modules that can only be run on machines with the corresponding packages installed. They are enabled in ``CMakeLists.txt`` by undocumented options used on CI builds. * ``Module/``: Tests for specific CMake modules. * ``RunCMake/``: Tests that run CMake and/or other tools while precisely checking their return code and stdout/stderr content. Useful for testing error cases and diagnostic output.