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Compiler arguments coming from CC environment variables or multi-element CMAKE_<LANG>_COMPILER variables set by toolchain files were previously not exposed in the file API. Among other possible problems, this caused clients to determine wrong system include paths and built-in preprocessor macros by calling the compiler without these important arguments. This is fixed by adding an optional "commandFragment" attribute to the compiler description in the `toolchains` object, containing these arguments as a command line fragment. This is already the form in which they are internally stored in the CMAKE_<LANG>_COMPILER_ARG1 variable, so all that is required is adding this variable to the set of exported variables, besides some logic to omit it if empty. Issue: #22568
CMake Tests Directory ********************* This directory contains the CMake test suite. See also the `CMake Testing Guide`_ and the `CMake Source Code Guide`_. .. _`CMake Testing Guide`: ../Help/dev/testing.rst .. _`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 Superseded by ``Tests/RunCMake/``.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. See `RunCMake/README.rst`_. .. _`RunCMake/README.rst`: RunCMake/README.rst