ca59c20939
We have some cache variables that are used in our qt.toolchain.cmake toolchain file, for example QT_CHAINLOAD_TOOLCHAIN_FILE. When CMake runs a configure test with try_compile, our toolchain file is included again, but only a restricted set of variables is available. Add the variables that are used in our internal toolchain file to CMAKE_TRY_COMPILE_PLATFORM_VARIABLES. This makes them visible for try_compile calls operating on source files. Also pass the variables via the environment to support try_compile calls that operate on whole projects. Fixes: QTBUG-87873 Change-Id: Iebca9e23686bec5072194b15482e1782b9367a0e Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
98 lines
4.4 KiB
CMake
98 lines
4.4 KiB
CMake
set(__qt_toolchain_used_variables
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QT_CHAINLOAD_TOOLCHAIN_FILE
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QT_TOOLCHAIN_INCLUDE_FILE
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QT_TOOLCHAIN_RELOCATABLE_CMAKE_DIR
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QT_TOOLCHAIN_RELOCATABLE_PREFIX)
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@init_additional_used_variables@
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# Make cache variables used by this toolchain file available to the
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# try_compile command that operates on sources files.
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list(APPEND CMAKE_TRY_COMPILE_PLATFORM_VARIABLES ${__qt_toolchain_used_variables})
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list(REMOVE_DUPLICATES CMAKE_TRY_COMPILE_PLATFORM_VARIABLES)
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# Turn the environment variables that are created at the end of this
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# file into proper variables. This is needed for try_compile calls
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# that operate on whole projects.
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if($ENV{_QT_TOOLCHAIN_VARS_INITIALIZED})
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foreach(var ${__qt_toolchain_used_variables})
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set(${var} "$ENV{_QT_TOOLCHAIN_${var}}")
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endforeach()
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endif()
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@init_qt_host_path@
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@init_qt_host_path_cmake_dir@
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@init_original_toolchain_file@
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@init_vcpkg@
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@init_platform@
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if(NOT "${QT_CHAINLOAD_TOOLCHAIN_FILE}" STREQUAL "")
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set(__qt_chainload_toolchain_file "${QT_CHAINLOAD_TOOLCHAIN_FILE}")
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endif()
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if(__qt_chainload_toolchain_file)
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get_filename_component(__qt_chainload_toolchain_file_real_path
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"${__qt_chainload_toolchain_file}" REALPATH)
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if(__qt_chainload_toolchain_file_real_path STREQUAL CMAKE_CURRENT_LIST_FILE)
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message(FATAL_ERROR
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"Woah, the Qt toolchain file tried to include itself recusively! '${__qt_chainload_toolchain_file}' "
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"Make sure to remove qtbase/CMakeCache.txt and reconfigure qtbase with 'cmake' "
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"rather than 'qt-cmake', and then you can reconfigure your own project."
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)
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elseif(NOT EXISTS "${__qt_chainload_toolchain_file_real_path}")
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message(WARNING "The toolchain file to be chainloaded "
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"'${__qt_chainload_toolchain_file}' does not exist.")
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else()
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include("${__qt_chainload_toolchain_file}")
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endif()
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unset(__qt_chainload_toolchain_file)
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endif()
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# Compute dynamically the Qt installation prefix from the location of this file. This allows
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# the usage of the toolchain file when the Qt installation is relocated.
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get_filename_component(QT_TOOLCHAIN_RELOCATABLE_INSTALL_PREFIX
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${CMAKE_CURRENT_LIST_DIR}/../@qt_path_from_cmake_config_dir_to_prefix@
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ABSOLUTE)
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# Compute the path to the installed Qt lib/cmake folder.
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# We assume that the Qt toolchain location is inside the CMake Qt6 package, and thus the directory
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# one level higher is what we're looking for.
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get_filename_component(QT_TOOLCHAIN_RELOCATABLE_CMAKE_DIR "${CMAKE_CURRENT_LIST_DIR}/.." ABSOLUTE)
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# There's a subdirectory check in cmake's cmFindCommon::RerootPaths() function, that doesn't handle
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# the case of CMAKE_PREFIX_PATH == CMAKE_FIND_ROOT_PATH for a particular pair of entries.
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# Instead of collapsing the search prefix (which is the case when one is a subdir of the other),
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# it concatenates them creating an invalid path. Workaround it by setting the root path to the
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# Qt install prefix, and the prefix path to the lib/cmake subdir.
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list(PREPEND CMAKE_PREFIX_PATH "${QT_TOOLCHAIN_RELOCATABLE_CMAKE_DIR}")
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list(PREPEND CMAKE_FIND_ROOT_PATH "${QT_TOOLCHAIN_RELOCATABLE_INSTALL_PREFIX}")
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@init_qt_host_path_checks@
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# Allow customization of the toolchain file by placing an additional file next to it.
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set(__qt_toolchain_extra_file "${CMAKE_CURRENT_LIST_DIR}/qt.toolchain.extra.cmake")
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if(EXISTS "${__qt_toolchain_extra_file}")
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include("${__qt_toolchain_extra_file}")
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endif()
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# Allow customization of the toolchain file by passing a path to an additional CMake file to be
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# included.
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if(QT_TOOLCHAIN_INCLUDE_FILE)
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get_filename_component(__qt_toolchain_include_file_real_path
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"${QT_TOOLCHAIN_INCLUDE_FILE}" REALPATH)
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if(EXISTS "${__qt_toolchain_include_file_real_path}")
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include("${__qt_toolchain_include_file_real_path}")
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else()
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message(WARNING "The passed extra toolchain file to be included does not exist: "
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"${__qt_toolchain_include_file_real_path}")
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endif()
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endif()
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# Compile tests only see a restricted set of variables.
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# All cache variables, this toolchain file uses, must be made available to compile tests,
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# because this toolchain file will be included there too.
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if(NOT ENV{_QT_TOOLCHAIN_VARS_INITIALIZED})
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set(ENV{_QT_TOOLCHAIN_VARS_INITIALIZED} ON)
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foreach(var ${__qt_toolchain_used_variables})
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set(ENV{_QT_TOOLCHAIN_${var}} "${${var}}")
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endforeach()
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endif()
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