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Diffstat (limited to 'cmake/QtBaseHelpers.cmake')
| -rw-r--r-- | cmake/QtBaseHelpers.cmake | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/cmake/QtBaseHelpers.cmake b/cmake/QtBaseHelpers.cmake new file mode 100644 index 0000000000..a16f6987b4 --- /dev/null +++ b/cmake/QtBaseHelpers.cmake @@ -0,0 +1,222 @@ +# Copyright (C) 2024 The Qt Company Ltd. +# SPDX-License-Identifier: BSD-3-Clause +# +# Note that this file is not installed. + +# Bail out if any part of the build directory's path is symlinked. +function(qt_internal_check_if_path_has_symlinks path) + get_filename_component(dir "${path}" ABSOLUTE) + set(is_symlink FALSE) + if(CMAKE_HOST_WIN32) + # CMake marks Windows mount points as symbolic links, so use simplified REALPATH check + # on Windows platforms instead of IS_SYMLINK. + get_filename_component(dir_realpath "${dir}" REALPATH) + if(NOT dir STREQUAL dir_realpath) + set(is_symlink TRUE) + endif() + else() + while(TRUE) + if(IS_SYMLINK "${dir}") + set(is_symlink TRUE) + break() + endif() + + set(prev_dir "${dir}") + get_filename_component(dir "${dir}" DIRECTORY) + if("${dir}" STREQUAL "${prev_dir}") + return() + endif() + endwhile() + endif() + if(is_symlink) + set(possible_solutions_for_resolving_symlink [[ + - Map directories using a transparent mechanism such as mount --bind + - Pass the real path of the build directory to CMake, e.g. using + cd $(realpath <path>) before invoking cmake <source_dir>. + ]]) + if(QT_ALLOW_SYMLINK_IN_PATHS) + # In some cases, e.g., Homebrew, it is beneficial to skip this check. + # Before this, Homebrew had to patch this out to be able to get their build. + message(WARNING + "The path \"${path}\" contains symlinks. " + "This is not recommended, and it may lead to unexpected issues. If you do " + "not have a good reason for enabling 'QT_ALLOW_SYMLINK_IN_PATHS', disable " + "it, and follow one of the following solutions: \n" + "${possible_solutions_for_resolving_symlink} ") + else() + message(FATAL_ERROR + "The path \"${path}\" contains symlinks. " + "This is not supported. Possible solutions: \n" + "${possible_solutions_for_resolving_symlink} ") + endif() + endif() +endfunction() + +# There are three necessary copies of this macro in +# qtbase/cmake/QtBaseHelpers.cmake +# qtbase/cmake/QtBaseTopLevelHelpers.cmake +# qtbase/cmake/QtBuildRepoHelpers.cmake +macro(qt_internal_qtbase_setup_standalone_parts) + # A generic marker for any kind of standalone builds, either tests or examples. + if(NOT DEFINED QT_INTERNAL_BUILD_STANDALONE_PARTS + AND (QT_BUILD_STANDALONE_TESTS OR QT_BUILD_STANDALONE_EXAMPLES)) + set(QT_INTERNAL_BUILD_STANDALONE_PARTS TRUE CACHE INTERNAL + "Whether standalone tests or examples are being built") + endif() +endmacro() + +macro(qt_internal_qtbase_run_autodetect) + qt_internal_qtbase_setup_standalone_parts() + + # Run auto detection routines, but not when doing standalone tests or standalone examples. + # In that case, the detection + # results are taken from either QtBuildInternals or the qt.toolchain.cmake file. Also, inhibit + # auto-detection in a top-level build, because the top-level project file already includes it. + if(NOT QT_INTERNAL_BUILD_STANDALONE_PARTS AND NOT QT_SUPERBUILD) + include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/QtAutoDetect.cmake) + endif() +endmacro() + +macro(qt_internal_qtbase_pre_project_setup) + if(NOT QT_INTERNAL_BUILD_STANDALONE_PARTS) + # Should this Qt be static or dynamically linked? + option(BUILD_SHARED_LIBS "Build Qt statically or dynamically" ON) + set(QT_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS}) + + # This variable is also set in Qt6CoreConfigExtras.cmake, but it's not loaded when building + # qtbase. Set it here so qt_add_plugin can compute the proper plugin flavor. + set(QT6_IS_SHARED_LIBS_BUILD ${BUILD_SHARED_LIBS}) + + # BUILD_SHARED_LIBS influences the minimum required CMake version. The value is set either + # by: + # a cache variable provided on the configure command line + # or set by QtAutoDetect.cmake depending on the platform + # or specified via a toolchain file that is loaded by the project() call + # or set by the option() call above + include("${CMAKE_CURRENT_SOURCE_DIR}/cmake/QtCMakeVersionHelpers.cmake") + include("${CMAKE_CURRENT_SOURCE_DIR}/cmake/QtPublicCMakeVersionHelpers.cmake") + qt_internal_check_and_warn_about_unsuitable_cmake_version() + + ## Add some paths to check for cmake modules: + list(PREPEND CMAKE_MODULE_PATH + "${CMAKE_CURRENT_SOURCE_DIR}/cmake" + "${CMAKE_CURRENT_SOURCE_DIR}/cmake/3rdparty/extra-cmake-modules/find-modules" + "${CMAKE_CURRENT_SOURCE_DIR}/cmake/3rdparty/kwin" + ) + + if(MACOS) + # Add module directory to pick up custom Info.plist template + list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/macos") + elseif(IOS) + # Add module directory to pick up custom Info.plist template + list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/ios") + endif() + + ## Find the build internals package. + set(QT_BUILD_INTERNALS_SKIP_CMAKE_MODULE_PATH_ADDITION TRUE) + list(PREPEND CMAKE_PREFIX_PATH + "${CMAKE_CURRENT_SOURCE_DIR}/cmake" + ) + find_package(QtBuildInternals CMAKE_FIND_ROOT_PATH_BOTH) + unset(QT_BUILD_INTERNALS_SKIP_CMAKE_MODULE_PATH_ADDITION) + else() + # When building standalone parts, an istalled BuildInternals package already exists. + find_package(Qt6 REQUIRED COMPONENTS BuildInternals CMAKE_FIND_ROOT_PATH_BOTH) + endif() +endmacro() + +macro(qt_internal_qtbase_install_mkspecs) + # As long as we use the mkspecs (for qplatformdefs.h), we need to always + # install it, especially when cross-compiling. + set(mkspecs_install_dir "${INSTALL_MKSPECSDIR}") + qt_path_join(mkspecs_install_dir ${QT_INSTALL_DIR} ${mkspecs_install_dir}) + + file(GLOB mkspecs_subdirs + LIST_DIRECTORIES TRUE + "${PROJECT_SOURCE_DIR}/mkspecs/*") + foreach(entry IN LISTS mkspecs_subdirs) + if (IS_DIRECTORY ${entry}) + qt_copy_or_install(DIRECTORY "${entry}" + DESTINATION ${mkspecs_install_dir} + USE_SOURCE_PERMISSIONS) + else() + qt_copy_or_install(FILES "${entry}" + DESTINATION ${mkspecs_install_dir}) + endif() + endforeach() +endmacro() + +macro(qt_internal_qtbase_build_repo) + qt_internal_qtbase_pre_project_setup() + + qt_internal_project_setup() + + qt_build_repo_begin() + + if(NOT QT_INTERNAL_BUILD_STANDALONE_PARTS) + ## Should this Qt be built with Werror? + option(WARNINGS_ARE_ERRORS "Build Qt with warnings as errors" ${FEATURE_developer_build}) + + ## Should this Qt create versioned hard link for some tools? + option(QT_CREATE_VERSIONED_HARD_LINK "Enable the use of versioned hard link" ON) + + ## QtBase specific configure tests: + include(QtBaseConfigureTests) + + ## Build System tests: + include(QtBaseCMakeTesting) + + ## Targets for global features, etc.: + include(QtBaseGlobalTargets) + + ## Set language standards after QtBaseGlobalTargets, because that's when the relevant + ## feature variables are available. + qt_set_language_standards() + + #include CoreMacros() for qt6_generate_meta_types() + set(QT_DEFAULT_MAJOR_VERSION 6) + include(src/corelib/Qt6CoreMacros.cmake) + + # Needed when building qtbase for android. + if(ANDROID) + include(src/corelib/Qt6AndroidMacros.cmake) + _qt_internal_create_global_android_targets() + endif() + + if(WASM) + # Needed when building for WebAssembly. + include(cmake/QtWasmHelpers.cmake) + include(src/corelib/Qt6WasmMacros.cmake) + qt_internal_setup_wasm_target_properties(Platform) + endif() + + # Set up optimization flags like in qmake. + # This function must be called after the global QT_FEATURE_xxx variables have been set up, + # aka after QtBaseGlobalTargets is processed. + # It also has to be called /before/ adding add_subdirectory(src), so that per-directory + # modifications can still be applied if necessary (like in done in Core and Gui). + qt_internal_set_up_config_optimizations_like_in_qmake() + + ## Setup documentation + add_subdirectory(doc) + + ## Visit all the directories: + add_subdirectory(src) + endif() + + if(NOT QT_INTERNAL_BUILD_STANDALONE_PARTS) + if(QT_WILL_BUILD_TOOLS AND QT_FEATURE_settings) + add_subdirectory(qmake) + endif() + + qt_internal_qtbase_install_mkspecs() + endif() + + qt_build_repo_post_process() + + qt_build_repo_impl_tests() + + qt_build_repo_end() + + qt_build_repo_impl_examples() +endmacro() |