2018-10-24 13:20:27 +00:00
|
|
|
function(qt_internal_write_depends_file target)
|
|
|
|
|
set(module Qt${target})
|
|
|
|
|
set(outfile "${PROJECT_BINARY_DIR}/include/${module}/${module}Depends")
|
|
|
|
|
message("Generate ${outfile}...")
|
|
|
|
|
set(contents "/* This file was generated by cmake with the info from ${module} target. */\n")
|
|
|
|
|
string(APPEND contents "#ifdef __cplusplus /* create empty PCH in C mode */\n")
|
|
|
|
|
foreach (m ${ARGN})
|
|
|
|
|
string(APPEND contents "# include <Qt${m}/Qt${m}>\n")
|
|
|
|
|
endforeach()
|
|
|
|
|
string(APPEND contents "#endif\n")
|
|
|
|
|
|
2018-10-30 14:25:53 +00:00
|
|
|
file(GENERATE OUTPUT "${outfile}" CONTENT "${contents}")
|
2018-10-24 13:20:27 +00:00
|
|
|
endfunction()
|
|
|
|
|
|
|
|
|
|
function(qt_internal_create_depends_files)
|
Export tool config and target files for each relevant module
CMake will now generate config and target files for each module that
provides tools. As a result, namespaced global targets such as
Qt5::moc or Qt5::rcc can be made available.
Third party projects that require just these tools, and not the Qt
modules themselves, should specify CMAKE_PREFIX_PATH pointing to the
installed Qt location, and call find_package(Qt5CoreTools),
find_package(Qt5GuiTools), etc.
It is also possible to call
find_package(Qt5Tools REQUIRED Core Widgets) where the last option
is a list of modules whose tools should be imported.
Note that all the tools are in the Qt5::
namespace and not in the Qt5CoreTools:: or Qt5WidgetsTools::
namespace.
This commit also changes the behavior regarding when to build tools
while building Qt itself.
When cross compiling Qt (checked via CMAKE_CROSSCOMPILING) or when
-DQT_FORCE_FIND_TOOLS=TRUE is passed, tools added by add_qt_tool will
always be searched for and not built.
In this case the user has to specify the CMake variable QT_HOST_PATH
pointing to an installed host Qt location.
When not cross compiling, tools added by add_qt_tool are built from
source.
When building leaf modules (like qtsvg) that require some tool that was
built in qtbase (like moc), the module project should contain a
find_package(Qt5ToolsCore) call and specify an appropriate
CMAKE_PREFIX_PATH so that the tool package is found.
Note that because HOST_QT_TOOLS_DIRECTORY was replaced by QT_HOST_PATH,
the ensure syncqt code was changed to make it work properly with
both qtbase and qtsvg.
Here's a list of tools and their module associations:
qmake, moc, rcc, tracegen, qfloat16-tables, qlalr -> CoreTools
qvkgen -> GuiTools
uic -> WidgetTools
dbus related tools -> DBusTools
Task-number: QTBUG-74134
Change-Id: Ie67d1e2f8de46102b48eca008f0b50caf4fbe3ed
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
2019-04-10 17:21:22 +00:00
|
|
|
message("Generating depends files for ${QT_KNOWN_MODULES}...")
|
|
|
|
|
foreach (target ${QT_KNOWN_MODULES})
|
2018-10-24 13:20:27 +00:00
|
|
|
get_target_property(depends "${target}" LINK_LIBRARIES)
|
Write find_dependency() calls in Qt Module config files
This change introduces a new function called qt_find_package()
which can take an extra option called PROVIDED_TARGETS, which
associates targets with the package that defines those targets.
This is done by setting the INTERFACE_QT_PACKAGE_NAME and
INTERFACE_QT_PACKAGE_VERSION properties on the imported targets.
This information allows us to generate appropriate find_dependency()
calls in a module's Config file for third party libraries.
For example when an application links against QtCore, it should also
link against zlib and atomic libraries. In order to do that, the
library locations first have to be found by CMake. This is achieved by
embedding find_dependency(ZLIB) and find_dependency(Atomic) in
Qt5CoreDependencies.cmake which is included by Qt5CoreConfig.cmake.
The latter is picked up when an application project contains
find_package(Qt5Core), and thus all linking dependencies are resolved.
The information 'which package provides which targets' is contained
in the python json2cmake conversion script. The generated output of
the script contains qt_find_package() calls that represent that
information.
The Qt5CoreDependencies.cmake file and which which dependencies it
contains is generated at the QtPostProcess stop.
Note that for non-static Qt builds, we only need to propagate public
3rd party libraries. For static builds, we need all third party
libraries.
In order for the INTERFACE_QT_PACKAGE_NAME property to be read in any
scope, the targets on which the property is set, have to be GLOBAL.
Also for applications and other modules to find all required third
party libraries, we have to install all our custom Find modules, and
make sure they define INTERFACE IMPORTED libraries, and not just
IMPORTED libraries.
Change-Id: I694d6e32d05b96d5e241df0156fc79d0029426aa
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
2019-04-24 15:14:25 +00:00
|
|
|
get_target_property(public_depends "${target}" INTERFACE_LINK_LIBRARIES)
|
2019-05-03 09:38:41 +00:00
|
|
|
get_target_property(target_deps "${target}" _qt_target_deps)
|
|
|
|
|
set(target_deps_seen "")
|
|
|
|
|
|
2019-03-11 11:32:56 +00:00
|
|
|
set(qtdeps "")
|
Write find_dependency() calls in Qt Module config files
This change introduces a new function called qt_find_package()
which can take an extra option called PROVIDED_TARGETS, which
associates targets with the package that defines those targets.
This is done by setting the INTERFACE_QT_PACKAGE_NAME and
INTERFACE_QT_PACKAGE_VERSION properties on the imported targets.
This information allows us to generate appropriate find_dependency()
calls in a module's Config file for third party libraries.
For example when an application links against QtCore, it should also
link against zlib and atomic libraries. In order to do that, the
library locations first have to be found by CMake. This is achieved by
embedding find_dependency(ZLIB) and find_dependency(Atomic) in
Qt5CoreDependencies.cmake which is included by Qt5CoreConfig.cmake.
The latter is picked up when an application project contains
find_package(Qt5Core), and thus all linking dependencies are resolved.
The information 'which package provides which targets' is contained
in the python json2cmake conversion script. The generated output of
the script contains qt_find_package() calls that represent that
information.
The Qt5CoreDependencies.cmake file and which which dependencies it
contains is generated at the QtPostProcess stop.
Note that for non-static Qt builds, we only need to propagate public
3rd party libraries. For static builds, we need all third party
libraries.
In order for the INTERFACE_QT_PACKAGE_NAME property to be read in any
scope, the targets on which the property is set, have to be GLOBAL.
Also for applications and other modules to find all required third
party libraries, we have to install all our custom Find modules, and
make sure they define INTERFACE IMPORTED libraries, and not just
IMPORTED libraries.
Change-Id: I694d6e32d05b96d5e241df0156fc79d0029426aa
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
2019-04-24 15:14:25 +00:00
|
|
|
set(third_party_deps "")
|
|
|
|
|
set(third_party_deps_seen "")
|
2019-04-29 12:36:25 +00:00
|
|
|
set(tool_deps "")
|
|
|
|
|
set(tool_deps_seen "")
|
2019-05-03 09:38:41 +00:00
|
|
|
|
2018-10-24 13:20:27 +00:00
|
|
|
foreach (dep ${depends})
|
2018-10-30 14:25:53 +00:00
|
|
|
# Normalize module by stripping leading "Qt::" and trailing "Private"
|
|
|
|
|
if (dep MATCHES "Qt::(.*)")
|
|
|
|
|
set(dep "${CMAKE_MATCH_1}")
|
|
|
|
|
endif()
|
|
|
|
|
if (dep MATCHES "(.*)Private")
|
|
|
|
|
set(dep "${CMAKE_MATCH_1}")
|
|
|
|
|
endif()
|
|
|
|
|
|
Export tool config and target files for each relevant module
CMake will now generate config and target files for each module that
provides tools. As a result, namespaced global targets such as
Qt5::moc or Qt5::rcc can be made available.
Third party projects that require just these tools, and not the Qt
modules themselves, should specify CMAKE_PREFIX_PATH pointing to the
installed Qt location, and call find_package(Qt5CoreTools),
find_package(Qt5GuiTools), etc.
It is also possible to call
find_package(Qt5Tools REQUIRED Core Widgets) where the last option
is a list of modules whose tools should be imported.
Note that all the tools are in the Qt5::
namespace and not in the Qt5CoreTools:: or Qt5WidgetsTools::
namespace.
This commit also changes the behavior regarding when to build tools
while building Qt itself.
When cross compiling Qt (checked via CMAKE_CROSSCOMPILING) or when
-DQT_FORCE_FIND_TOOLS=TRUE is passed, tools added by add_qt_tool will
always be searched for and not built.
In this case the user has to specify the CMake variable QT_HOST_PATH
pointing to an installed host Qt location.
When not cross compiling, tools added by add_qt_tool are built from
source.
When building leaf modules (like qtsvg) that require some tool that was
built in qtbase (like moc), the module project should contain a
find_package(Qt5ToolsCore) call and specify an appropriate
CMAKE_PREFIX_PATH so that the tool package is found.
Note that because HOST_QT_TOOLS_DIRECTORY was replaced by QT_HOST_PATH,
the ensure syncqt code was changed to make it work properly with
both qtbase and qtsvg.
Here's a list of tools and their module associations:
qmake, moc, rcc, tracegen, qfloat16-tables, qlalr -> CoreTools
qvkgen -> GuiTools
uic -> WidgetTools
dbus related tools -> DBusTools
Task-number: QTBUG-74134
Change-Id: Ie67d1e2f8de46102b48eca008f0b50caf4fbe3ed
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
2019-04-10 17:21:22 +00:00
|
|
|
list(FIND QT_KNOWN_MODULES "${dep}" _pos)
|
2018-10-24 13:20:27 +00:00
|
|
|
if (_pos GREATER -1)
|
|
|
|
|
list(APPEND qtdeps "${dep}")
|
2019-04-29 12:36:25 +00:00
|
|
|
|
|
|
|
|
# Make the ModuleTool package depend on dep's ModuleTool package.
|
|
|
|
|
list(FIND tool_deps_seen ${dep} dep_seen)
|
|
|
|
|
if(dep_seen EQUAL -1 AND ${dep} IN_LIST QT_KNOWN_MODULES_WITH_TOOLS)
|
|
|
|
|
list(APPEND tool_deps_seen ${dep})
|
|
|
|
|
list(APPEND tool_deps
|
|
|
|
|
"${INSTALL_CMAKE_NAMESPACE}${dep}Tools\;${PROJECT_VERSION}")
|
|
|
|
|
endif()
|
2018-10-24 13:20:27 +00:00
|
|
|
endif()
|
|
|
|
|
endforeach()
|
2018-10-30 14:25:53 +00:00
|
|
|
|
Write find_dependency() calls in Qt Module config files
This change introduces a new function called qt_find_package()
which can take an extra option called PROVIDED_TARGETS, which
associates targets with the package that defines those targets.
This is done by setting the INTERFACE_QT_PACKAGE_NAME and
INTERFACE_QT_PACKAGE_VERSION properties on the imported targets.
This information allows us to generate appropriate find_dependency()
calls in a module's Config file for third party libraries.
For example when an application links against QtCore, it should also
link against zlib and atomic libraries. In order to do that, the
library locations first have to be found by CMake. This is achieved by
embedding find_dependency(ZLIB) and find_dependency(Atomic) in
Qt5CoreDependencies.cmake which is included by Qt5CoreConfig.cmake.
The latter is picked up when an application project contains
find_package(Qt5Core), and thus all linking dependencies are resolved.
The information 'which package provides which targets' is contained
in the python json2cmake conversion script. The generated output of
the script contains qt_find_package() calls that represent that
information.
The Qt5CoreDependencies.cmake file and which which dependencies it
contains is generated at the QtPostProcess stop.
Note that for non-static Qt builds, we only need to propagate public
3rd party libraries. For static builds, we need all third party
libraries.
In order for the INTERFACE_QT_PACKAGE_NAME property to be read in any
scope, the targets on which the property is set, have to be GLOBAL.
Also for applications and other modules to find all required third
party libraries, we have to install all our custom Find modules, and
make sure they define INTERFACE IMPORTED libraries, and not just
IMPORTED libraries.
Change-Id: I694d6e32d05b96d5e241df0156fc79d0029426aa
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
2019-04-24 15:14:25 +00:00
|
|
|
# If we are doing a non-static Qt build, we only want to propagate public dependencies.
|
|
|
|
|
# If we are doing a static Qt build, we need to propagate all dependencies.
|
|
|
|
|
set(depends_var "public_depends")
|
|
|
|
|
if(NOT QT_BUILD_SHARED_LIBS)
|
|
|
|
|
set(depends_var "depends")
|
|
|
|
|
endif()
|
|
|
|
|
|
|
|
|
|
foreach(dep ${${depends_var}})
|
|
|
|
|
# Gather third party packages that should be found when using the Qt module.
|
2019-05-03 13:21:30 +00:00
|
|
|
# Also handle nolink target dependencies.
|
|
|
|
|
string(REGEX REPLACE "_nolink$" "" base_dep "${dep}")
|
|
|
|
|
if(NOT base_dep STREQUAL dep)
|
|
|
|
|
# Resets target name like Vulkan_nolink to Vulkan, because we need to call
|
|
|
|
|
# find_package(Vulkan).
|
|
|
|
|
set(dep ${base_dep})
|
|
|
|
|
endif()
|
|
|
|
|
|
Write find_dependency() calls in Qt Module config files
This change introduces a new function called qt_find_package()
which can take an extra option called PROVIDED_TARGETS, which
associates targets with the package that defines those targets.
This is done by setting the INTERFACE_QT_PACKAGE_NAME and
INTERFACE_QT_PACKAGE_VERSION properties on the imported targets.
This information allows us to generate appropriate find_dependency()
calls in a module's Config file for third party libraries.
For example when an application links against QtCore, it should also
link against zlib and atomic libraries. In order to do that, the
library locations first have to be found by CMake. This is achieved by
embedding find_dependency(ZLIB) and find_dependency(Atomic) in
Qt5CoreDependencies.cmake which is included by Qt5CoreConfig.cmake.
The latter is picked up when an application project contains
find_package(Qt5Core), and thus all linking dependencies are resolved.
The information 'which package provides which targets' is contained
in the python json2cmake conversion script. The generated output of
the script contains qt_find_package() calls that represent that
information.
The Qt5CoreDependencies.cmake file and which which dependencies it
contains is generated at the QtPostProcess stop.
Note that for non-static Qt builds, we only need to propagate public
3rd party libraries. For static builds, we need all third party
libraries.
In order for the INTERFACE_QT_PACKAGE_NAME property to be read in any
scope, the targets on which the property is set, have to be GLOBAL.
Also for applications and other modules to find all required third
party libraries, we have to install all our custom Find modules, and
make sure they define INTERFACE IMPORTED libraries, and not just
IMPORTED libraries.
Change-Id: I694d6e32d05b96d5e241df0156fc79d0029426aa
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
2019-04-24 15:14:25 +00:00
|
|
|
if(TARGET ${dep})
|
|
|
|
|
list(FIND third_party_deps_seen ${dep} dep_seen)
|
|
|
|
|
|
|
|
|
|
get_target_property(package_name ${dep} INTERFACE_QT_PACKAGE_NAME)
|
|
|
|
|
if(dep_seen EQUAL -1 AND package_name)
|
|
|
|
|
list(APPEND third_party_deps_seen ${dep})
|
|
|
|
|
get_target_property(package_version ${dep} INTERFACE_QT_PACKAGE_VERSION)
|
|
|
|
|
if(NOT package_version)
|
|
|
|
|
set(package_version "")
|
|
|
|
|
endif()
|
|
|
|
|
|
|
|
|
|
get_target_property(package_components ${dep} INTERFACE_QT_PACKAGE_COMPONENTS)
|
|
|
|
|
if(NOT package_components)
|
|
|
|
|
set(package_components "")
|
|
|
|
|
endif()
|
|
|
|
|
|
|
|
|
|
list(APPEND third_party_deps
|
|
|
|
|
"${package_name}\;${package_version}\;${package_components}")
|
|
|
|
|
endif()
|
|
|
|
|
endif()
|
|
|
|
|
endforeach()
|
|
|
|
|
|
2019-04-29 12:36:25 +00:00
|
|
|
# Add dependency to the main ModuleTool package to ModuleDependencies file.
|
|
|
|
|
if(${target} IN_LIST QT_KNOWN_MODULES_WITH_TOOLS)
|
|
|
|
|
set(main_module_tool_deps
|
|
|
|
|
"${INSTALL_CMAKE_NAMESPACE}${target}Tools\;${PROJECT_VERSION}")
|
|
|
|
|
endif()
|
|
|
|
|
|
2019-05-03 09:38:41 +00:00
|
|
|
# Dirty hack because https://gitlab.kitware.com/cmake/cmake/issues/19200
|
|
|
|
|
foreach(dep ${target_deps})
|
|
|
|
|
if(dep)
|
|
|
|
|
list(FIND target_deps_seen "${dep}" dep_seen)
|
|
|
|
|
if(dep_seen EQUAL -1)
|
|
|
|
|
list(LENGTH dep len)
|
|
|
|
|
if(NOT (len EQUAL 2))
|
|
|
|
|
message(FATAL_ERROR "List '${dep}' should look like QtFoo;version")
|
|
|
|
|
endif()
|
|
|
|
|
list(GET dep 0 dep_name)
|
|
|
|
|
list(GET dep 1 dep_ver)
|
|
|
|
|
|
|
|
|
|
list(APPEND target_deps_seen "${dep_name}\;${dep_ver}")
|
|
|
|
|
endif()
|
|
|
|
|
endif()
|
|
|
|
|
endforeach()
|
|
|
|
|
set(target_deps "${target_deps_seen}")
|
|
|
|
|
|
2018-10-30 14:25:53 +00:00
|
|
|
if (DEFINED qtdeps)
|
|
|
|
|
list(REMOVE_DUPLICATES qtdeps)
|
|
|
|
|
endif()
|
|
|
|
|
|
2018-10-24 13:20:27 +00:00
|
|
|
get_target_property(hasModuleHeaders "${target}" MODULE_HAS_HEADERS)
|
|
|
|
|
if (${hasModuleHeaders})
|
|
|
|
|
qt_internal_write_depends_file("${target}" ${qtdeps})
|
|
|
|
|
endif()
|
Write find_dependency() calls in Qt Module config files
This change introduces a new function called qt_find_package()
which can take an extra option called PROVIDED_TARGETS, which
associates targets with the package that defines those targets.
This is done by setting the INTERFACE_QT_PACKAGE_NAME and
INTERFACE_QT_PACKAGE_VERSION properties on the imported targets.
This information allows us to generate appropriate find_dependency()
calls in a module's Config file for third party libraries.
For example when an application links against QtCore, it should also
link against zlib and atomic libraries. In order to do that, the
library locations first have to be found by CMake. This is achieved by
embedding find_dependency(ZLIB) and find_dependency(Atomic) in
Qt5CoreDependencies.cmake which is included by Qt5CoreConfig.cmake.
The latter is picked up when an application project contains
find_package(Qt5Core), and thus all linking dependencies are resolved.
The information 'which package provides which targets' is contained
in the python json2cmake conversion script. The generated output of
the script contains qt_find_package() calls that represent that
information.
The Qt5CoreDependencies.cmake file and which which dependencies it
contains is generated at the QtPostProcess stop.
Note that for non-static Qt builds, we only need to propagate public
3rd party libraries. For static builds, we need all third party
libraries.
In order for the INTERFACE_QT_PACKAGE_NAME property to be read in any
scope, the targets on which the property is set, have to be GLOBAL.
Also for applications and other modules to find all required third
party libraries, we have to install all our custom Find modules, and
make sure they define INTERFACE IMPORTED libraries, and not just
IMPORTED libraries.
Change-Id: I694d6e32d05b96d5e241df0156fc79d0029426aa
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
2019-04-24 15:14:25 +00:00
|
|
|
|
2019-04-29 12:36:25 +00:00
|
|
|
|
2019-05-03 09:38:41 +00:00
|
|
|
if(third_party_deps OR main_module_tool_deps OR target_deps)
|
2019-04-29 12:36:25 +00:00
|
|
|
# Configure and install ModuleDependencies file.
|
Write find_dependency() calls in Qt Module config files
This change introduces a new function called qt_find_package()
which can take an extra option called PROVIDED_TARGETS, which
associates targets with the package that defines those targets.
This is done by setting the INTERFACE_QT_PACKAGE_NAME and
INTERFACE_QT_PACKAGE_VERSION properties on the imported targets.
This information allows us to generate appropriate find_dependency()
calls in a module's Config file for third party libraries.
For example when an application links against QtCore, it should also
link against zlib and atomic libraries. In order to do that, the
library locations first have to be found by CMake. This is achieved by
embedding find_dependency(ZLIB) and find_dependency(Atomic) in
Qt5CoreDependencies.cmake which is included by Qt5CoreConfig.cmake.
The latter is picked up when an application project contains
find_package(Qt5Core), and thus all linking dependencies are resolved.
The information 'which package provides which targets' is contained
in the python json2cmake conversion script. The generated output of
the script contains qt_find_package() calls that represent that
information.
The Qt5CoreDependencies.cmake file and which which dependencies it
contains is generated at the QtPostProcess stop.
Note that for non-static Qt builds, we only need to propagate public
3rd party libraries. For static builds, we need all third party
libraries.
In order for the INTERFACE_QT_PACKAGE_NAME property to be read in any
scope, the targets on which the property is set, have to be GLOBAL.
Also for applications and other modules to find all required third
party libraries, we have to install all our custom Find modules, and
make sure they define INTERFACE IMPORTED libraries, and not just
IMPORTED libraries.
Change-Id: I694d6e32d05b96d5e241df0156fc79d0029426aa
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
2019-04-24 15:14:25 +00:00
|
|
|
configure_file(
|
|
|
|
|
"${QT_CMAKE_DIR}/QtModuleDependencies.cmake.in"
|
|
|
|
|
"${CMAKE_CURRENT_BINARY_DIR}/${INSTALL_CMAKE_NAMESPACE}${target}Dependencies.cmake"
|
|
|
|
|
@ONLY
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
set(config_install_dir "${INSTALL_LIBDIR}/cmake/${INSTALL_CMAKE_NAMESPACE}${target}")
|
|
|
|
|
|
|
|
|
|
install(FILES
|
|
|
|
|
"${CMAKE_CURRENT_BINARY_DIR}/${INSTALL_CMAKE_NAMESPACE}${target}Dependencies.cmake"
|
|
|
|
|
DESTINATION "${config_install_dir}"
|
|
|
|
|
COMPONENT Devel
|
|
|
|
|
)
|
|
|
|
|
endif()
|
2019-04-29 12:36:25 +00:00
|
|
|
if(tool_deps)
|
|
|
|
|
# Configure and install ModuleToolDependencies file.
|
|
|
|
|
configure_file(
|
|
|
|
|
"${QT_CMAKE_DIR}/QtModuleToolsDependencies.cmake.in"
|
|
|
|
|
"${CMAKE_CURRENT_BINARY_DIR}/${INSTALL_CMAKE_NAMESPACE}${target}ToolsDependencies.cmake"
|
|
|
|
|
@ONLY
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
set(config_install_dir
|
|
|
|
|
"${INSTALL_LIBDIR}/cmake/${INSTALL_CMAKE_NAMESPACE}${target}Tools")
|
|
|
|
|
|
|
|
|
|
install(FILES
|
|
|
|
|
"${CMAKE_CURRENT_BINARY_DIR}/${INSTALL_CMAKE_NAMESPACE}${target}ToolsDependencies.cmake"
|
|
|
|
|
DESTINATION "${config_install_dir}"
|
|
|
|
|
COMPONENT Devel
|
|
|
|
|
)
|
|
|
|
|
endif()
|
2018-10-24 13:20:27 +00:00
|
|
|
endforeach()
|
Write find_dependency() calls in Qt Module config files
This change introduces a new function called qt_find_package()
which can take an extra option called PROVIDED_TARGETS, which
associates targets with the package that defines those targets.
This is done by setting the INTERFACE_QT_PACKAGE_NAME and
INTERFACE_QT_PACKAGE_VERSION properties on the imported targets.
This information allows us to generate appropriate find_dependency()
calls in a module's Config file for third party libraries.
For example when an application links against QtCore, it should also
link against zlib and atomic libraries. In order to do that, the
library locations first have to be found by CMake. This is achieved by
embedding find_dependency(ZLIB) and find_dependency(Atomic) in
Qt5CoreDependencies.cmake which is included by Qt5CoreConfig.cmake.
The latter is picked up when an application project contains
find_package(Qt5Core), and thus all linking dependencies are resolved.
The information 'which package provides which targets' is contained
in the python json2cmake conversion script. The generated output of
the script contains qt_find_package() calls that represent that
information.
The Qt5CoreDependencies.cmake file and which which dependencies it
contains is generated at the QtPostProcess stop.
Note that for non-static Qt builds, we only need to propagate public
3rd party libraries. For static builds, we need all third party
libraries.
In order for the INTERFACE_QT_PACKAGE_NAME property to be read in any
scope, the targets on which the property is set, have to be GLOBAL.
Also for applications and other modules to find all required third
party libraries, we have to install all our custom Find modules, and
make sure they define INTERFACE IMPORTED libraries, and not just
IMPORTED libraries.
Change-Id: I694d6e32d05b96d5e241df0156fc79d0029426aa
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
2019-04-24 15:14:25 +00:00
|
|
|
|
|
|
|
|
|
2018-10-24 13:20:27 +00:00
|
|
|
endfunction()
|
|
|
|
|
|
|
|
|
|
qt_internal_create_depends_files()
|
