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QtPkgConfigHelpers.cmake
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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause
function(qt_internal_collect_direct_target_dependencies target targets_out_var)
__qt_internal_walk_libs("${target}" "${targets_out_var}" _rcc_objects
"qt_direct_targets_dict" "direct_targets")
set("${targets_out_var}" "${${targets_out_var}}" PARENT_SCOPE)
endfunction()
macro(qt_internal_set_pkg_config_cpp_flags var options flag)
set(tmpopts "${options}")
list(FILTER tmpopts EXCLUDE REGEX "\\$<BUILD_INTERFACE:[^,>]+>")
list(FILTER tmpopts EXCLUDE REGEX "\\$<TARGET_PROPERTY:[^,>]+>")
list(TRANSFORM tmpopts REPLACE "\\$<\\$<LINK_LANGUAGE:[^,>]+>:([^,>]+)>" "\\1")
list(TRANSFORM tmpopts REPLACE "\\$<INSTALL_INTERFACE:([^,>]+)>" "\\1")
list(TRANSFORM tmpopts REPLACE ">" "$<ANGLE-R>")
list(TRANSFORM tmpopts REPLACE "," "$<COMMA>")
set(${var} "$<$<BOOL:${tmpopts}>:${flag}$<JOIN:$<REMOVE_DUPLICATES:${tmpopts}>, ${flag}>>")
unset(tmpopts)
endmacro()
# Create a Qt6*.pc file intended for pkg-config consumption.
function(qt_internal_generate_pkg_config_file module)
# TODO: PkgConfig is supported under MSVC with pkgconf (github.com/pkgconf/pkgconf)
if((NOT UNIX OR QT_FEATURE_framework)
AND NOT MINGW OR CMAKE_VERSION VERSION_LESS "3.20" OR ANDROID)
return()
endif()
if(NOT BUILD_SHARED_LIBS)
return()
endif()
set(pkgconfig_file "${QT_CMAKE_EXPORT_NAMESPACE}${module}")
set(pkgconfig_name "${QT_CMAKE_EXPORT_NAMESPACE} ${module}")
set(pkgconfig_description "Qt ${module} module")
set(target "${QT_CMAKE_EXPORT_NAMESPACE}::${module}")
set(is_interface_library "$<STREQUAL:$<TARGET_PROPERTY:${target},TYPE>,INTERFACE_LIBRARY>")
# The flags macro expanded this variables so it's better to set them at
# their corresponding PkgConfig string.
set(includedir "\${includedir}")
set(mkspecsdir "\${mkspecsdir}")
get_target_property(is_internal_module ${target} _qt_is_internal_module)
if(is_internal_module)
return()
endif()
get_target_property(loose_link_options ${target} INTERFACE_LINK_OPTIONS)
get_target_property(loose_compile_defs ${target} INTERFACE_COMPILE_DEFINITIONS)
get_target_property(loose_include_dirs ${target} INTERFACE_INCLUDE_DIRECTORIES)
list(TRANSFORM loose_include_dirs REPLACE "${INSTALL_INCLUDEDIR}" "\${includedir}")
list(TRANSFORM loose_include_dirs REPLACE "${INSTALL_MKSPECSDIR}" "\${mkspecsdir}")
# Remove genex wrapping around gc_sections flag because we can't evaluate genexes like
# $<CXX_COMPILER_ID> in file(GENERATE). And given that .pc files don't support dynamic
# evaluation like the $<CXX_COMPILER_ID> genex, distros will be expected to patch the .pc
# files according to which compiler they intend to be used with.
get_property(gc_sections_with_genex GLOBAL PROPERTY _qt_internal_gc_sections_with_genex)
get_property(gc_sections_without_genex GLOBAL PROPERTY _qt_internal_gc_sections_without_genex)
if(loose_link_options AND gc_sections_with_genex AND gc_sections_without_genex)
string(REPLACE "${gc_sections_with_genex}" "${gc_sections_without_genex}"
loose_link_options "${loose_link_options}")
endif()
qt_internal_set_pkg_config_cpp_flags(link_options "${loose_link_options}" "")
qt_internal_set_pkg_config_cpp_flags(compile_defs "${loose_compile_defs}" -D)
qt_internal_set_pkg_config_cpp_flags(include_dirs "${loose_include_dirs}" -I)
if("${include_dirs}" MATCHES "\\${mkspecsdir}")
set(contains_mkspecs TRUE)
endif()
# TODO: Handle macOS framework builds
qt_internal_collect_direct_target_dependencies(${target} loose_target_requires)
foreach(dep IN LISTS loose_target_requires)
if(dep MATCHES "^Qt::")
string(REGEX REPLACE "Qt" "${QT_CMAKE_EXPORT_NAMESPACE}" dep ${dep})
elseif(NOT dep MATCHES "^${QT_CMAKE_EXPORT_NAMESPACE}::")
# TODO: Figure out a way to get non-Qt requirements PkgConfig files.
continue()
endif()
if(NOT TARGET ${dep})
continue()
endif()
get_target_property(is_internal_module ${dep} _qt_is_internal_module)
if(is_internal_module OR dep MATCHES ".*Platform.*Internal")
continue()
endif()
get_target_property(type ${dep} TYPE)
if(type STREQUAL "INTERFACE_LIBRARY")
if(dep MATCHES "(.*)Private")
set(dep "${CMAKE_MATCH_1}")
endif()
get_target_property(type ${dep} TYPE)
endif()
string(REGEX REPLACE "::" "" req ${dep})
if(type STREQUAL "STATIC_LIBRARY")
list(APPEND target_libs -l${req})
else()
list(APPEND target_requires ${req})
endif()
endforeach()
string(APPEND link_options " $<JOIN:$<REMOVE_DUPLICATES:${target_libs}>, >")
qt_path_join(path_suffix "${INSTALL_LIBDIR}" pkgconfig)
qt_path_join(build_dir "${QT_BUILD_DIR}" "${path_suffix}")
qt_path_join(install_dir "${QT_INSTALL_DIR}" "${path_suffix}")
set(step_prefix "preliminary_pc_for_${pkgconfig_file}")
qt_path_join(template_pc "${QT_CMAKE_DIR}" PkgConfigLibrary.pc.in)
qt_path_join(pc_step1_path "${build_dir}" ${step_prefix}_step1.pc)
qt_path_join(pc_step2_path "${build_dir}" ${step_prefix}_$<CONFIG>_step2.pc)
configure_file("${template_pc}" "${pc_step1_path}" @ONLY)
file(GENERATE OUTPUT "${pc_step2_path}" INPUT "${pc_step1_path}")
if(QT_GENERATOR_IS_MULTI_CONFIG)
set(configs ${CMAKE_CONFIGURATION_TYPES})
set(rels ${configs})
list(FILTER rels INCLUDE REGEX "(Release|RelWithDebInfo|MinSizeRel)")
if(rels)
list(GET rels 0 release)
endif()
else()
set(configs ${CMAKE_BUILD_TYPE})
set(release ${configs})
endif()
foreach(config ${configs})
if(config STREQUAL "Debug" AND CMAKE_DEBUG_POSTFIX)
set(postfix ${CMAKE_DEBUG_POSTFIX})
elseif(NOT config STREQUAL release)
string(TOLOWER "_${config}" postfix)
else()
set(postfix "")
endif()
set(extra_args "")
if(NOT postfix STREQUAL "")
list(APPEND extra_args "-DPOSTFIX=${postfix}")
endif()
qt_path_join(pc_step2_path "${build_dir}" ${step_prefix}_${config}_step2.pc)
qt_path_join(final_pc_path "${build_dir}" ${pkgconfig_file}${postfix}.pc)
add_custom_command(
OUTPUT "${final_pc_path}"
DEPENDS "${pc_step2_path}"
"${QT_CMAKE_DIR}/QtFinishPkgConfigFile.cmake"
COMMAND ${CMAKE_COMMAND}
"-DIN_FILE=${pc_step2_path}"
"-DOUT_FILE=${final_pc_path}"
${extra_args}
-P "${QT_CMAKE_DIR}/QtFinishPkgConfigFile.cmake"
VERBATIM
COMMENT "Generating pc file for target ${target}"
)
# This is inspired by https://gitlab.kitware.com/cmake/cmake/-/issues/20842
target_sources(${module} PRIVATE "${final_pc_path}")
qt_install(FILES "${final_pc_path}" DESTINATION "${install_dir}")
endforeach()
endfunction()