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Xcode 12 doesn't allow nested builds within the same build directory. That means we can no longer do an install by building the install target when IOS_INSTALL_COMBINED is true. We can, however, still do an install by running the cmake_install.cmake script or executing cmake --install, since there is no outer build and therefore the associated SDK can be built as a sub-build. The non-build methods previously didn't work when IOS_INSTALL_COMBINED was true because the generated install script and the CMakeIOSInstallCombined script both made certain assumptions that relied on being part of a build. Those assumptions are now removed. A side-effect of this work is that cpack now also works from the command line when IOS_INSTALL_COMBINED is true. Relates: #21282 Fixes: #20023
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 Superseded by ``Tests/RunCMake/``.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.