mirror of
https://github.com/crystalidea/qt6windows7.git
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149 lines
7.5 KiB
CMake
149 lines
7.5 KiB
CMake
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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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# Finish a preliminary .prl file.
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#
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# - Replaces occurrences of the build libdir with $$[QT_INSTALL_LIBDIR].
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# - Strips version number suffixes from absolute paths, because qmake's lflag
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# merging does not handle them correctly.
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# - Transforms absolute library paths into link flags
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# aka from "/usr/lib/x86_64-linux-gnu/libcups.so" to "-lcups"
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# - Replaces Qt absolute framework paths into a combination of -F$$[QT_INSTALL_LIBS] and
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# -framework QtFoo
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# - Prepends '-l' to values that are not absolute paths, and don't start with a dash
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# aka, '-lfoo', '-framework', '-pthread'.
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#
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# The path to the final .prl file is stored in the input file as assignment to FINAL_PRL_FILE_PATH.
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#
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# This file is to be used in CMake script mode with the following variables set:
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# IN_FILE: path to the step 1 preliminary .prl file
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# OUT_FILE: path to the step 2 preliminary .prl file that is going to be created
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# QT_LIB_DIRS: list of paths where Qt libraries are located.
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# This includes the install prefix and the current repo build dir.
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# These paths get replaced with relocatable paths or linker / framework flags.
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# LIBRARY_SUFFIXES: list of known library extensions, e.g. .so;.a on Linux
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# LIBRARY_PREFIXES: list of known library prefies, e.g. the "lib" in "libz" on on Linux
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# LINK_LIBRARY_FLAG: flag used to link a shared library to an executable, e.g. -l on UNIX
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# IMPLICIT_LINK_DIRECTORIES: list of implicit linker search paths
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cmake_policy(SET CMP0007 NEW)
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include("${CMAKE_CURRENT_LIST_DIR}/QtGenerateLibHelpers.cmake")
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file(STRINGS "${IN_FILE}" lines)
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set(content "")
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set(qt_framework_search_path_inserted FALSE)
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foreach(line ${lines})
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if(line MATCHES "^RCC_OBJECTS = (.*)")
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set(rcc_objects ${CMAKE_MATCH_1})
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elseif(line MATCHES "^QMAKE_PRL_TARGET_PATH_FOR_CMAKE = (.*)")
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set(target_library_path "${CMAKE_MATCH_1}")
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elseif(line MATCHES "^QMAKE_PRL_LIBS_FOR_CMAKE = (.*)")
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unset(adjusted_libs)
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foreach(lib ${CMAKE_MATCH_1})
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if("${lib}" STREQUAL "")
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continue()
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endif()
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# Check if the absolute path represents a Qt module located either in Qt's
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# $prefix/lib dir, or in the build dir of the repo.
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if(IS_ABSOLUTE "${lib}")
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qt_internal_path_is_relative_to_qt_lib_path(
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"${lib}" "${QT_LIB_DIRS}" lib_is_a_qt_module relative_lib)
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if(NOT lib_is_a_qt_module)
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# It's not a Qt module, extract the library name and prepend an -l to make
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# it relocatable.
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qt_transform_absolute_library_paths_to_link_flags(lib_with_link_flag "${lib}")
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list(APPEND adjusted_libs "${lib_with_link_flag}")
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else()
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# Is a Qt module.
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# Transform Qt framework paths into -framework flags.
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if(relative_lib MATCHES "^(Qt(.+))\\.framework/")
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if(NOT qt_framework_search_path_inserted)
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set(qt_framework_search_path_inserted TRUE)
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list(APPEND adjusted_libs "-F$$[QT_INSTALL_LIBS]")
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endif()
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list(APPEND adjusted_libs "-framework" "${CMAKE_MATCH_1}")
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else()
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# Not a framework, transform the Qt module into relocatable relative path.
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qt_strip_library_version_suffix(relative_lib "${relative_lib}")
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list(APPEND adjusted_libs "$$[QT_INSTALL_LIBS]/${relative_lib}")
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endif()
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endif()
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else()
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# Not absolute path, most likely a library name or a linker flag.
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# If linker flag (like -framework, -lfoo, -pthread, keep it as-is).
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if(NOT lib MATCHES "^-")
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string(PREPEND lib "-l")
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endif()
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list(APPEND adjusted_libs "${lib}")
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endif()
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endforeach()
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if(rcc_objects)
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set(libs_to_prepend ${rcc_objects})
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# By default, when qmake processes prl files, it first puts the processed library
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# on the link line, followed by all values specified in QMAKE_PRL_LIBS.
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# Because we add the resource object files into QMAKE_PRL_LIBS, this means they will
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# also appear on the link line after the library.
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# This causes issues on Linux because the linker may discard unreferenced symbols from
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# the library, which are referenced by the resource object files.
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# We can't control the placement of the library in relation to QMAKE_PRL_LIBS, but we
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# can add the library one more time in QMAKE_PRL_LIBS, after the object files.
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# qmake's UnixMakefileGenerator::findLibraries then takes care of deduplication, which
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# keeps the last occurrence of the library on the link line, the one after the object
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# files.
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qt_internal_path_is_relative_to_qt_lib_path(
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"${target_library_path}" "${QT_LIB_DIRS}" lib_is_a_qt_module relative_lib)
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if(NOT lib_is_a_qt_module)
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qt_internal_path_is_relative_to_qt_lib_path(
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"${target_library_path}" "${QT_PLUGIN_DIRS}" lib_is_a_qt_plugin relative_lib)
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endif()
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if(NOT lib_is_a_qt_module AND NOT lib_is_a_qt_plugin)
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qt_internal_path_is_relative_to_qt_lib_path(
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"${target_library_path}" "${QT_QML_DIRS}" lib_is_a_qt_qml_plugin relative_lib)
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endif()
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if(NOT lib_is_a_qt_module AND NOT lib_is_a_qt_plugin AND NOT lib_is_a_qt_qml_plugin)
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message(AUTHOR_WARNING
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"Could not determine relative path for library ${target_library_path} when "
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"generating prl file contents. An absolute path will be embedded, which "
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"will cause issues if the Qt installation is relocated.")
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list(APPEND libs_to_prepend "${target_library_path}")
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else()
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set(qmake_lib_path_prefix "$$[QT_PRL_INVALID_QMAKE_VARIABLE]")
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if(lib_is_a_qt_module)
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set(qmake_lib_path_prefix "$$[QT_INSTALL_LIBS]")
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elseif(lib_is_a_qt_plugin)
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set(qmake_lib_path_prefix "$$[QT_INSTALL_PLUGINS]")
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elseif(lib_is_a_qt_qml_plugin)
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set(qmake_lib_path_prefix "$$[QT_INSTALL_QML]")
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endif()
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qt_strip_library_version_suffix(relative_lib "${relative_lib}")
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list(APPEND libs_to_prepend "${qmake_lib_path_prefix}/${relative_lib}")
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endif()
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list(PREPEND adjusted_libs ${libs_to_prepend})
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endif()
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list(JOIN adjusted_libs " " adjusted_libs_for_qmake)
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string(APPEND content "QMAKE_PRL_LIBS = ${adjusted_libs_for_qmake}\n")
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string(APPEND content "QMAKE_PRL_LIBS_FOR_CMAKE = ${adjusted_libs}\n")
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else()
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string(APPEND content "${line}\n")
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endif()
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endforeach()
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file(WRITE "${OUT_FILE}" "${content}")
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# Read the prl meta file to find out where should the final prl file be placed,
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# Copy it there, if the contents hasn't changed.
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file(STRINGS "${IN_META_FILE}" lines)
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foreach(line ${lines})
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if(line MATCHES "^FINAL_PRL_FILE_PATH = (.*)")
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set(final_prl_file_path "${CMAKE_MATCH_1}")
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configure_file(
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"${OUT_FILE}"
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"${final_prl_file_path}"
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COPYONLY
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)
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endif()
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endforeach()
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