2023-10-30 06:33:08 +08:00
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# Copyright (C) 2022 The Qt Company Ltd.
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# SPDX-License-Identifier: BSD-3-Clause
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# Returns the platform-specific relative rpath base token, if it's supported.
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# If it's not supported, returns the string NO_KNOWN_RPATH_REL_BASE.
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function(qt_internal_get_relative_rpath_base_token out_var)
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if(APPLE)
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set(rpath_rel_base "@loader_path")
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2023-11-02 01:02:52 +08:00
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elseif(LINUX OR SOLARIS OR FREEBSD OR HURD OR OPENBSD)
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2023-10-30 06:33:08 +08:00
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set(rpath_rel_base "$ORIGIN")
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else()
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set(rpath_rel_base "NO_KNOWN_RPATH_REL_BASE")
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endif()
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set(${out_var} "${rpath_rel_base}" PARENT_SCOPE)
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endfunction()
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# Computes a relative rpath between ${rpath} and ${install_location} using tokens
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# like $ORIGIN / @loader_path
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# Not all platforms support such tokens though, in which case the returned rpath will be invalid.
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#
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# install_location: a directory relative to CMAKE_INSTALL_PREFIX, where the binary will be installed
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# rpath: an rpath to embed, can be either an absolute path or a path relative to
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# ${CMAKE_INSTALL_PREFIX}/${INSTALL_LIBDIR}.
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function(qt_compute_relative_rpath_base rpath install_location out_var)
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set(install_lib_dir_absolute "${CMAKE_INSTALL_PREFIX}/${INSTALL_LIBDIR}")
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get_filename_component(rpath_absolute "${rpath}"
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ABSOLUTE BASE_DIR "${install_lib_dir_absolute}")
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set(install_location_absolute "${install_location}")
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if(NOT IS_ABSOLUTE "${install_location_absolute}")
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set(install_location_absolute "${CMAKE_INSTALL_PREFIX}/${install_location}")
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endif()
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# Compute relative rpath from where the target will be installed, to the place where libraries
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# will be placed (INSTALL_LIBDIR).
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file(RELATIVE_PATH rpath_relative "${install_location_absolute}" "${rpath_absolute}")
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if("${rpath_relative}" STREQUAL "")
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# file(RELATIVE_PATH) returns an empty string if the given absolute paths are equal
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set(rpath_relative ".")
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endif()
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# Prepend $ORIGIN / @loader_path style tokens (qmake's QMAKE_REL_RPATH_BASE), to make the
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# relative rpaths work. qmake does this automatically when generating a project, so it wasn't
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# needed in the .prf files, but for CMake we need to prepend them ourselves.
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qt_internal_get_relative_rpath_base_token(rpath_rel_base)
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if(rpath_rel_base STREQUAL "NO_KNOWN_RPATH_REL_BASE")
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message(WARNING "No known RPATH_REL_BASE for target platform.")
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endif()
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if(rpath_relative STREQUAL ".")
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set(rpath_relative "${rpath_rel_base}")
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else()
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set(rpath_relative "${rpath_rel_base}/${rpath_relative}")
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endif()
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set("${out_var}" "${rpath_relative}" PARENT_SCOPE)
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endfunction()
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# Applies necessary rpaths to a target upon target installation.
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# No-op when targeting Windows, Android.
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#
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# Since abf72395411b135054b5820f64f93dfbcda430b8 rpaths are also applied in non-prefix builds,
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# to address -rpath-link issues when cross-compiling, although this might not be needed anymore
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# due to 606124c5cceba0dd4a406a9278588b58bb9f9800.
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# See QTBUG-86533 for the whole saga.
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#
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# If no RELATIVE_RPATH option is given, embeds an absolute path rpath to
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# ${CMAKE_INSTALL_PREFIX}/${INSTALL_LIBDIR} into the target.
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# If RELATIVE_RPATH is given, the INSTALL_PATH value is used to compute the relative path from
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# ${CMAKE_INSTALL_PREFIX}/${INSTALL_LIBDIR} to wherever the target will be installed
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# (the value of INSTALL_PATH).
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# INSTALL_PATH is expected to be a relative directory where the binary / library will be installed.
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# RELATIVE_RPATH is the equivalent of qmake's relative_qt_rpath.
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# INSTALL_PATH is used to implement the equivalent of qmake's $$qtRelativeRPathBase().
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#
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# QT_DISABLE_RPATH can be set to disable embedding any Qt specific rpaths.
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function(qt_apply_rpaths)
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# No rpath support for win32 and android.
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if(WIN32 OR ANDROID)
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return()
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endif()
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# Rpaths explicitly disabled (like for uikit), equivalent to qmake's no_qt_rpath.
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# Or feature was turned OFF.
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if(QT_DISABLE_RPATH OR NOT QT_FEATURE_rpath)
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return()
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endif()
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cmake_parse_arguments(PARSE_ARGV 0 arg
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"RELATIVE_RPATH"
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"TARGET;INSTALL_PATH"
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"")
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_qt_internal_validate_all_args_are_parsed(arg)
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if(NOT arg_TARGET)
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message(FATAL_ERROR "No target given to qt_apply_rpaths.")
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else()
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set(target "${arg_TARGET}")
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endif()
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# If a target is not built (which can happen for tools when crosscompiling, we shouldn't try
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# to apply properties.
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if(NOT TARGET "${target}")
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return()
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endif()
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# Protect against interface libraries.
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get_target_property(target_type "${target}" TYPE)
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if (target_type STREQUAL "INTERFACE_LIBRARY")
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return()
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endif()
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if(NOT arg_INSTALL_PATH)
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message(FATAL_ERROR "No INSTALL_PATH given to qt_apply_rpaths.")
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endif()
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set(rpaths "")
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# Modify the install path to contain the nested structure of a framework.
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get_target_property(is_framework "${target}" FRAMEWORK)
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if(is_framework)
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qt_internal_get_framework_info(fw ${target})
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if(UIKIT)
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# Shallow framework
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string(APPEND arg_INSTALL_PATH "/${fw_dir}")
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else()
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# Full framework
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string(APPEND arg_INSTALL_PATH "/${fw_dir}/Versions/Current")
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endif()
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endif()
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# Same but for an app bundle.
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get_target_property(is_bundle "${target}" MACOSX_BUNDLE)
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if(is_bundle AND NOT is_framework)
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if(UIKIT)
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# Shallow bundle
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string(APPEND arg_INSTALL_PATH "/${target}.app")
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else()
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# Full bundle
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string(APPEND arg_INSTALL_PATH "/${target}.app/Contents/MacOS")
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endif()
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endif()
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qt_internal_get_relative_rpath_base_token(rpath_base_token)
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if(rpath_base_token STREQUAL "NO_KNOWN_RPATH_REL_BASE")
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set(relative_rpath_supported FALSE)
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else()
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set(relative_rpath_supported TRUE)
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endif()
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# Somewhat similar to mkspecs/features/qt.prf
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# Embed either an absolute path to the installed Qt lib dir, or a relative one, based on
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# where ${target} is installed.
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# Don't embed relative rpaths if the platform does not support it.
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if(arg_RELATIVE_RPATH AND relative_rpath_supported)
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qt_compute_relative_rpath_base(
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"${_default_install_rpath}" "${arg_INSTALL_PATH}" relative_rpath)
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list(APPEND rpaths "${relative_rpath}")
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else()
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list(APPEND rpaths "${_default_install_rpath}")
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endif()
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# Somewhat similar to mkspecs/features/qt_build_extra.prf.
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foreach(rpath ${QT_EXTRA_RPATHS})
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if(IS_ABSOLUTE "${rpath}")
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list(APPEND rpaths "${rpath}")
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else()
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if(relative_rpath_supported)
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qt_compute_relative_rpath_base("${rpath}" "${arg_INSTALL_PATH}" relative_rpath)
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list(APPEND rpaths "${relative_rpath}")
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else()
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# Any extra relative rpaths on a platform that does not support relative rpaths,
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# need to be transformed into absolute ones.
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set(install_lib_dir_absolute "${CMAKE_INSTALL_PREFIX}/${INSTALL_LIBDIR}")
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get_filename_component(rpath_absolute "${rpath}"
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ABSOLUTE BASE_DIR "${install_lib_dir_absolute}")
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list(APPEND rpaths "${rpath_absolute}")
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endif()
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endif()
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endforeach()
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if(rpaths)
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list(REMOVE_DUPLICATES rpaths)
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if(QT_WILL_INSTALL)
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set(prop_name "INSTALL_RPATH")
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else()
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set(prop_name "BUILD_RPATH")
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endif()
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set_property(TARGET "${target}" APPEND PROPERTY "${prop_name}" ${rpaths})
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endif()
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endfunction()
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# Overrides the CMAKE_STAGING_PREFIX in a subdirectory scope, to stop CMake from rewriting build
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# rpaths to point into the original staging prefix, and thus breaking running executables from
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# the build directory.
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# See details at https://bugreports.qt.io/browse/QTBUG-102592
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# and https://gitlab.kitware.com/cmake/cmake/-/issues/23421
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#
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# This macro is only meant to be called in functions like
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# qt_internal_add_module / qt_internal_add_tool to ensure the variable is set in the
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# subdirectory scope of the calling function, and not in the actual function scope (where the
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# variable assignment would have no effect).
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#
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# This is the best workaround we can currently do, but it comes with the disadvantage that calling
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# subdirectory-scoped install targets does not work anymore.
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# e.g. calling ninja src/gui/install will try to install to the fake prefix and fail.
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# A regular ninja install call works fine.
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#
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# Usage of this macro assumes there are no binaries or libraries added in the root CMakeLists.txt
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# of the project because that would mean the macro is called at root level scope, which would
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# break installation.
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#
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# The implementation has to be a macro, so we can propagate the variable into the calling
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# subdirectory scope. The implementation can't use return().
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macro(qt_internal_apply_staging_prefix_build_rpath_workaround)
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set(__qt_internal_should_apply_staging_prefix_build_rpath_workaround TRUE)
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# Allow an opt out.
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if(QT_NO_STAGING_PREFIX_BUILD_RPATH_WORKAROUND)
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set(__qt_internal_should_apply_staging_prefix_build_rpath_workaround FALSE)
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endif()
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# No need for workaround if CMAKE_STAGING_PREFIX is not set.
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if(NOT CMAKE_STAGING_PREFIX)
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set(__qt_internal_should_apply_staging_prefix_build_rpath_workaround FALSE)
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endif()
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# No rpath support for win32, android, ios, so nothing to do.
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if(WIN32 OR ANDROID OR UIKIT)
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set(__qt_internal_should_apply_staging_prefix_build_rpath_workaround FALSE)
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endif()
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# Set the staging prefix to a non-existent directory, which is unlikely to have permissions
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# for installation.
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# The verbose directory name is chosen to attract the user's attention in case if they end up
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# calling a subdirectory-scope install file.
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if(__qt_internal_should_apply_staging_prefix_build_rpath_workaround)
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set_property(GLOBAL PROPERTY _qt_internal_staging_prefix_build_rpath_workaround TRUE)
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set(CMAKE_STAGING_PREFIX
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"/qt_fake_staging_prefix/check_qt_internal_apply_staging_prefix_build_rpath_workaround"
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PARENT_SCOPE)
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endif()
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endmacro()
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