62905163bf
Introduce a new libexec/qt-internal-configure-examples script that allows to configure and build "standalone examples" just like "standalone tests". This is a prerequisite for using deployment api in examples for prefix builds, otherwise deployment api gets confused not finding various information that it expects from an installed qt. Because the various conditions in the build system for standalone examples are similar to standalone tests, introduce a new QT_BUILD_STANDALONE_PARTS variable and use that in the conditions. The variable should not be set by the user, and is instead set by the build system whenever QT_BUILD_STANDALONE_TESTS/EXAMPLES is set. Unfortunately due to no common file being available before the first project() call, in qtbase builds, per-repo builds and top-level builds, we need to duplicate the code for setting QT_BUILD_STANDALONE_PARTS for all three cases. Task-number: QTBUG-90820 Task-number: QTBUG-96232 Change-Id: Ia40d03a0e8f5142abe5c7cd4ff3000df4a5f7a8a Reviewed-by: Alexey Edelev <alexey.edelev@qt.io> Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
87 lines
3.9 KiB
CMake
87 lines
3.9 KiB
CMake
# Copyright (C) 2022 The Qt Company Ltd.
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# SPDX-License-Identifier: BSD-3-Clause
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include_guard()
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# Get CMake variables that are needed to build external projects such as examples or CMake test
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# projects.
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#
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# CMAKE_DIR_VAR: Variable name to store the path to the Qt6 CMake config module.
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#
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# PREFIXES_VAR: Variable name to store the prefixes that can be passed as CMAKE_PREFIX_PATH.
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#
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# ADDITIONAL_PACKAGES_PREFIXES_VAR: Variable name to store the prefixes that can be appended to
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# QT_ADDITIONAL_PACKAGES_PREFIX_PATH.
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function(_qt_internal_get_build_vars_for_external_projects)
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set(no_value_options "")
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set(single_value_options
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CMAKE_DIR_VAR
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PREFIXES_VAR
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ADDITIONAL_PACKAGES_PREFIXES_VAR
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)
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set(multi_value_options "")
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cmake_parse_arguments(PARSE_ARGV 0 arg
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"${no_value_options}" "${single_value_options}" "${multi_value_options}"
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)
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# Standalone tests and examples have QT_BUILD_DIR pointing to the fake standalone prefix.
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# Use instead the relocatable prefix, because qt must have been built / installed by this point.
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if(QT_INTERNAL_BUILD_STANDALONE_PARTS)
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qt_path_join(qt_cmake_dir
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"${QT_BUILD_INTERNALS_RELOCATABLE_INSTALL_PREFIX}"
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"${INSTALL_LIBDIR}/cmake/${QT_CMAKE_EXPORT_NAMESPACE}"
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)
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set(qt_prefixes "${QT_BUILD_INTERNALS_RELOCATABLE_INSTALL_PREFIX}")
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set(qt_additional_packages_prefixes "${qt_prefixes}")
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if(QT_WILL_INSTALL)
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list(APPEND qt_prefixes "${QT6_INSTALL_PREFIX}")
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endif()
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# TODO: Fix example/test builds when using Conan / install prefixes are different for each repo.
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elseif(QT_SUPERBUILD OR QtBase_BINARY_DIR)
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# When doing a top-level build or when building qtbase,
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# always use the Config file from the current build directory, even for prefix builds.
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# We strive to allow building examples without installing Qt first, which means we can't
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# use the install or staging Config files.
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set(qt_prefixes "${QT_BUILD_DIR}")
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set(qt_cmake_dir "${QT_CONFIG_BUILD_DIR}/${QT_CMAKE_EXPORT_NAMESPACE}")
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set(qt_additional_packages_prefixes "")
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else()
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# This is a per-repo build that isn't the qtbase repo, so we know that
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# qtbase was found via find_package() and Qt6_DIR must be set
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set(qt_cmake_dir "${${QT_CMAKE_EXPORT_NAMESPACE}_DIR}")
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# In a prefix build of a non-qtbase repo, we want to pick up the installed Config files
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# for all repos except the one that is currently built. For the repo that is currently
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# built, we pick up the Config files from the current repo build dir instead.
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# For non-prefix builds, there's only one prefix, the main build dir.
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# Both are handled by this assignment.
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set(qt_prefixes "${QT_BUILD_DIR}")
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# Appending to QT_ADDITIONAL_PACKAGES_PREFIX_PATH helps find Qt6 components in
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# non-qtbase prefix builds because we use NO_DEFAULT_PATH in find_package calls.
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# It also handles the cross-compiling scenario where we need to adjust both the root path
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# and prefixes, with the prefixes containing lib/cmake. This leverages the infrastructure
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# previously added for Conan.
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set(qt_additional_packages_prefixes "${qt_prefixes}")
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# In a prefix build, look up all repo Config files in the install prefix,
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# except for the current repo, which will look in the build dir (handled above).
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if(QT_WILL_INSTALL)
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list(APPEND qt_prefixes "${QT6_INSTALL_PREFIX}")
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endif()
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endif()
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if(arg_CMAKE_DIR_VAR)
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set("${arg_CMAKE_DIR_VAR}" "${qt_cmake_dir}" PARENT_SCOPE)
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endif()
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if(arg_PREFIXES_VAR)
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set("${arg_PREFIXES_VAR}" "${qt_prefixes}" PARENT_SCOPE)
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endif()
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if(arg_ADDITIONAL_PACKAGES_PREFIXES_VAR)
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set("${arg_ADDITIONAL_PACKAGES_PREFIXES_VAR}" "${qt_additional_packages_prefixes}"
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PARENT_SCOPE)
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endif()
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endfunction()
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