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https://github.com/crystalidea/qt6windows7.git
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105 lines
4.5 KiB
CMake
105 lines
4.5 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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# Add a finalizer function for the current CMake list file.
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# It will be processed just before leaving the current source directory scope.
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#
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# When using CMake 3.18 or lower:
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# You may add up to nine arguments that are passed to the finalizer.
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# A finalizer that is registered with qt_add_list_file_finalizer(foo bar baz)
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# will be called with nine arguments: foo(bar baz IGNORE IGNORE IGNORE...),
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# because CMake's handling of empty list elements is a cruel joke.
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# For CMake < 3.18 the function qt_watch_current_list_dir must know about the finalizer.
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#
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# When using CMake 3.19 or higher, no more IGNORE parameters are passed. Instead we
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# use cmake_language(DEFER CALL) and pass arguments as usual.
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# qt_watch_current_list_dir also doesn't need to know about the finalizer
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function(qt_add_list_file_finalizer func)
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set(use_cmake_defer_call TRUE)
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if(CMAKE_VERSION VERSION_LESS "3.19.0")
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set(use_cmake_defer_call FALSE)
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endif()
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if(use_cmake_defer_call)
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cmake_language(EVAL CODE "cmake_language(DEFER CALL \"${func}\" ${ARGN}) ")
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else()
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set_property(GLOBAL APPEND
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PROPERTY QT_LIST_FILE_FINALIZER_FILES "${CMAKE_CURRENT_LIST_FILE}")
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set_property(GLOBAL APPEND
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PROPERTY QT_LIST_FILE_FINALIZER_FUNCS ${func})
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foreach(i RANGE 1 9)
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set(arg "${ARGV${i}}")
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if(i GREATER_EQUAL ARGC OR "${arg}" STREQUAL "")
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set(arg "IGNORE")
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endif()
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set_property(GLOBAL APPEND
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PROPERTY QT_LIST_FILE_FINALIZER_ARGV${i} "${arg}")
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endforeach()
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endif()
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endfunction()
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# Watcher function for the variable CMAKE_CURRENT_LIST_DIR.
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# This is the driver of the finalizer facility.
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function(qt_watch_current_list_dir variable access value current_list_file stack)
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if(NOT access STREQUAL "MODIFIED_ACCESS")
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# We are only interested in modifications of CMAKE_CURRENT_LIST_DIR.
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return()
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endif()
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list(GET stack -1 stack_top)
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if(stack_top STREQUAL current_list_file)
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# If the top of the stack equals the current list file then
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# we're entering a file. We're not interested in this case.
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return()
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endif()
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get_property(files GLOBAL PROPERTY QT_LIST_FILE_FINALIZER_FILES)
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if(NOT files)
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return()
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endif()
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get_property(funcs GLOBAL PROPERTY QT_LIST_FILE_FINALIZER_FUNCS)
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foreach(i RANGE 1 9)
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get_property(args${i} GLOBAL PROPERTY QT_LIST_FILE_FINALIZER_ARGV${i})
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endforeach()
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list(LENGTH files n)
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set(i 0)
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while(i LESS n)
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list(GET files ${i} file)
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if(file STREQUAL stack_top)
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list(GET funcs ${i} func)
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foreach(k RANGE 1 9)
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list(GET args${k} ${i} a${k})
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endforeach()
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# We've found a file we're looking for. Call the finalizer.
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if(${CMAKE_VERSION} VERSION_LESS "3.18.0")
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# Make finalizer known functions here:
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if(func STREQUAL "qt_finalize_module")
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qt_finalize_module(${a1} ${a2} ${a3} ${a4} ${a5} ${a6} ${a7} ${a8} ${a9})
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elseif(func STREQUAL "qt_finalize_plugin")
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qt_finalize_plugin(${a1} ${a2} ${a3} ${a4} ${a5} ${a6} ${a7} ${a8} ${a9})
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elseif(func STREQUAL "qt_internal_finalize_app")
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qt_internal_finalize_app(${a1} ${a2} ${a3} ${a4} ${a5} ${a6} ${a7} ${a8} ${a9})
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elseif(func STREQUAL "qt_internal_export_additional_targets_file_finalizer")
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qt_internal_export_additional_targets_file_finalizer(
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${a1} ${a2} ${a3} ${a4} ${a5} ${a6} ${a7} ${a8} ${a9})
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else()
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message(FATAL_ERROR "qt_watch_current_list_dir doesn't know about ${func}. Consider adding it.")
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endif()
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else()
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cmake_language(CALL ${func} ${a1} ${a2} ${a3} ${a4} ${a5} ${a6} ${a7} ${a8} ${a9})
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endif()
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list(REMOVE_AT files ${i})
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list(REMOVE_AT funcs ${i})
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foreach(k RANGE 1 9)
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list(REMOVE_AT args${k} ${i})
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endforeach()
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math(EXPR n "${n} - 1")
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else()
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math(EXPR i "${i} + 1")
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endif()
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endwhile()
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set_property(GLOBAL PROPERTY QT_LIST_FILE_FINALIZER_FILES ${files})
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set_property(GLOBAL PROPERTY QT_LIST_FILE_FINALIZER_FUNCS ${funcs})
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foreach(i RANGE 1 9)
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set_property(GLOBAL PROPERTY QT_LIST_FILE_FINALIZER_ARGV${i} "${args${i}}")
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endforeach()
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endfunction()
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