298 lines
13 KiB
CMake
298 lines
13 KiB
CMake
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#.rst:
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# ECMFindModuleHelpers
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# --------------------
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#
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# Helper macros for find modules: ecm_find_package_version_check(),
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# ecm_find_package_parse_components() and
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# ecm_find_package_handle_library_components().
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#
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# ::
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#
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# ecm_find_package_version_check(<name>)
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#
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# Prints warnings if the CMake version or the project's required CMake version
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# is older than that required by extra-cmake-modules.
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#
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# ::
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#
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# ecm_find_package_parse_components(<name>
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# RESULT_VAR <variable>
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# KNOWN_COMPONENTS <component1> [<component2> [...]]
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# [SKIP_DEPENDENCY_HANDLING])
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#
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# This macro will populate <variable> with a list of components found in
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# <name>_FIND_COMPONENTS, after checking that all those components are in the
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# list of KNOWN_COMPONENTS; if there are any unknown components, it will print
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# an error or warning (depending on the value of <name>_FIND_REQUIRED) and call
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# return().
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#
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# The order of components in <variable> is guaranteed to match the order they
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# are listed in the KNOWN_COMPONENTS argument.
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#
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# If SKIP_DEPENDENCY_HANDLING is not set, for each component the variable
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# <name>_<component>_component_deps will be checked for dependent components.
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# If <component> is listed in <name>_FIND_COMPONENTS, then all its (transitive)
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# dependencies will also be added to <variable>.
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#
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# ::
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#
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# ecm_find_package_handle_library_components(<name>
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# COMPONENTS <component> [<component> [...]]
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# [SKIP_DEPENDENCY_HANDLING])
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# [SKIP_PKG_CONFIG])
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#
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# Creates an imported library target for each component. The operation of this
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# macro depends on the presence of a number of CMake variables.
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#
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# The <name>_<component>_lib variable should contain the name of this library,
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# and <name>_<component>_header variable should contain the name of a header
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# file associated with it (whatever relative path is normally passed to
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# '#include'). <name>_<component>_header_subdir variable can be used to specify
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# which subdirectory of the include path the headers will be found in.
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# ecm_find_package_components() will then search for the library
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# and include directory (creating appropriate cache variables) and create an
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# imported library target named <name>::<component>.
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#
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# Additional variables can be used to provide additional information:
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#
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# If SKIP_PKG_CONFIG, the <name>_<component>_pkg_config variable is set, and
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# pkg-config is found, the pkg-config module given by
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# <name>_<component>_pkg_config will be searched for and used to help locate the
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# library and header file. It will also be used to set
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# <name>_<component>_VERSION.
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#
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# Note that if version information is found via pkg-config,
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# <name>_<component>_FIND_VERSION can be set to require a particular version
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# for each component.
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#
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# If SKIP_DEPENDENCY_HANDLING is not set, the INTERFACE_LINK_LIBRARIES property
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# of the imported target for <component> will be set to contain the imported
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# targets for the components listed in <name>_<component>_component_deps.
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# <component>_FOUND will also be set to false if any of the compoments in
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# <name>_<component>_component_deps are not found. This requires the components
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# in <name>_<component>_component_deps to be listed before <component> in the
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# COMPONENTS argument.
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#
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# The following variables will be set:
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#
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# ``<name>_TARGETS``
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# the imported targets
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# ``<name>_LIBRARIES``
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# the found libraries
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# ``<name>_INCLUDE_DIRS``
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# the combined required include directories for the components
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# ``<name>_DEFINITIONS``
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# the "other" CFLAGS provided by pkg-config, if any
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# ``<name>_VERSION``
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# the value of ``<name>_<component>_VERSION`` for the first component that
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# has this variable set (note that components are searched for in the order
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# they are passed to the macro), although if it is already set, it will not
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# be altered
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#
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# Note that these variables are never cleared, so if
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# ecm_find_package_handle_library_components() is called multiple times with
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# different components (typically because of multiple find_package() calls) then
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# ``<name>_TARGETS``, for example, will contain all the targets found in any
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# call (although no duplicates).
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#
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# Since pre-1.0.0.
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#=============================================================================
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# Copyright 2014 Alex Merry <alex.merry@kde.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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include(CMakeParseArguments)
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macro(ecm_find_package_version_check module_name)
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if(CMAKE_VERSION VERSION_LESS 2.8.12)
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message(FATAL_ERROR "CMake 2.8.12 is required by Find${module_name}.cmake")
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endif()
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if(CMAKE_MINIMUM_REQUIRED_VERSION VERSION_LESS 2.8.12)
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message(AUTHOR_WARNING "Your project should require at least CMake 2.8.12 to use Find${module_name}.cmake")
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endif()
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endmacro()
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macro(ecm_find_package_parse_components module_name)
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set(ecm_fppc_options SKIP_DEPENDENCY_HANDLING)
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set(ecm_fppc_oneValueArgs RESULT_VAR)
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set(ecm_fppc_multiValueArgs KNOWN_COMPONENTS DEFAULT_COMPONENTS)
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cmake_parse_arguments(ECM_FPPC "${ecm_fppc_options}" "${ecm_fppc_oneValueArgs}" "${ecm_fppc_multiValueArgs}" ${ARGN})
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if(ECM_FPPC_UNPARSED_ARGUMENTS)
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message(FATAL_ERROR "Unexpected arguments to ecm_find_package_parse_components: ${ECM_FPPC_UNPARSED_ARGUMENTS}")
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endif()
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if(NOT ECM_FPPC_RESULT_VAR)
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message(FATAL_ERROR "Missing RESULT_VAR argument to ecm_find_package_parse_components")
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endif()
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if(NOT ECM_FPPC_KNOWN_COMPONENTS)
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message(FATAL_ERROR "Missing KNOWN_COMPONENTS argument to ecm_find_package_parse_components")
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endif()
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if(NOT ECM_FPPC_DEFAULT_COMPONENTS)
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set(ECM_FPPC_DEFAULT_COMPONENTS ${ECM_FPPC_KNOWN_COMPONENTS})
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endif()
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if(${module_name}_FIND_COMPONENTS)
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set(ecm_fppc_requestedComps ${${module_name}_FIND_COMPONENTS})
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if(NOT ECM_FPPC_SKIP_DEPENDENCY_HANDLING)
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# Make sure deps are included
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foreach(ecm_fppc_comp ${ecm_fppc_requestedComps})
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foreach(ecm_fppc_dep_comp ${${module_name}_${ecm_fppc_comp}_component_deps})
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list(FIND ecm_fppc_requestedComps "${ecm_fppc_dep_comp}" ecm_fppc_index)
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if("${ecm_fppc_index}" STREQUAL "-1")
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if(NOT ${module_name}_FIND_QUIETLY)
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message(STATUS "${module_name}: ${ecm_fppc_comp} requires ${${module_name}_${ecm_fppc_comp}_component_deps}")
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endif()
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list(APPEND ecm_fppc_requestedComps "${ecm_fppc_dep_comp}")
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endif()
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endforeach()
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endforeach()
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else()
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message(STATUS "Skipping dependency handling for ${module_name}")
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endif()
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list(REMOVE_DUPLICATES ecm_fppc_requestedComps)
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# This makes sure components are listed in the same order as
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# KNOWN_COMPONENTS (potentially important for inter-dependencies)
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set(${ECM_FPPC_RESULT_VAR})
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foreach(ecm_fppc_comp ${ECM_FPPC_KNOWN_COMPONENTS})
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list(FIND ecm_fppc_requestedComps "${ecm_fppc_comp}" ecm_fppc_index)
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if(NOT "${ecm_fppc_index}" STREQUAL "-1")
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list(APPEND ${ECM_FPPC_RESULT_VAR} "${ecm_fppc_comp}")
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list(REMOVE_AT ecm_fppc_requestedComps ${ecm_fppc_index})
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endif()
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endforeach()
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# if there are any left, they are unknown components
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if(ecm_fppc_requestedComps)
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set(ecm_fppc_msgType STATUS)
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if(${module_name}_FIND_REQUIRED)
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set(ecm_fppc_msgType FATAL_ERROR)
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endif()
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if(NOT ${module_name}_FIND_QUIETLY)
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message(${ecm_fppc_msgType} "${module_name}: requested unknown components ${ecm_fppc_requestedComps}")
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endif()
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return()
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endif()
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else()
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set(${ECM_FPPC_RESULT_VAR} ${ECM_FPPC_DEFAULT_COMPONENTS})
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endif()
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endmacro()
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macro(ecm_find_package_handle_library_components module_name)
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set(ecm_fpwc_options SKIP_PKG_CONFIG SKIP_DEPENDENCY_HANDLING)
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set(ecm_fpwc_oneValueArgs)
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set(ecm_fpwc_multiValueArgs COMPONENTS)
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cmake_parse_arguments(ECM_FPWC "${ecm_fpwc_options}" "${ecm_fpwc_oneValueArgs}" "${ecm_fpwc_multiValueArgs}" ${ARGN})
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if(ECM_FPWC_UNPARSED_ARGUMENTS)
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message(FATAL_ERROR "Unexpected arguments to ecm_find_package_handle_components: ${ECM_FPWC_UNPARSED_ARGUMENTS}")
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endif()
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if(NOT ECM_FPWC_COMPONENTS)
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message(FATAL_ERROR "Missing COMPONENTS argument to ecm_find_package_handle_components")
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endif()
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include(FindPackageHandleStandardArgs)
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find_package(PkgConfig)
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foreach(ecm_fpwc_comp ${ECM_FPWC_COMPONENTS})
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set(ecm_fpwc_dep_vars)
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set(ecm_fpwc_dep_targets)
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if(NOT SKIP_DEPENDENCY_HANDLING)
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foreach(ecm_fpwc_dep ${${module_name}_${ecm_fpwc_comp}_component_deps})
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list(APPEND ecm_fpwc_dep_vars "${module_name}_${ecm_fpwc_dep}_FOUND")
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list(APPEND ecm_fpwc_dep_targets "${module_name}::${ecm_fpwc_dep}")
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endforeach()
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endif()
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if(NOT ECM_FPWC_SKIP_PKG_CONFIG AND ${module_name}_${ecm_fpwc_comp}_pkg_config)
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pkg_check_modules(PKG_${module_name}_${ecm_fpwc_comp} QUIET
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${${module_name}_${ecm_fpwc_comp}_pkg_config})
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endif()
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find_path(${module_name}_${ecm_fpwc_comp}_INCLUDE_DIR
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NAMES ${${module_name}_${ecm_fpwc_comp}_header}
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HINTS ${PKG_${module_name}_${ecm_fpwc_comp}_INCLUDE_DIRS}
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PATH_SUFFIXES ${${module_name}_${ecm_fpwc_comp}_header_subdir}
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)
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find_library(${module_name}_${ecm_fpwc_comp}_LIBRARY
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NAMES ${${module_name}_${ecm_fpwc_comp}_lib}
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HINTS ${PKG_${module_name}_${ecm_fpwc_comp}_LIBRARY_DIRS}
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)
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set(${module_name}_${ecm_fpwc_comp}_VERSION "${PKG_${module_name}_${ecm_fpwc_comp}_VERSION}")
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if(NOT ${module_name}_VERSION)
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set(${module_name}_VERSION ${${module_name}_${ecm_fpwc_comp}_VERSION})
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endif()
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find_package_handle_standard_args(${module_name}_${ecm_fpwc_comp}
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FOUND_VAR
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${module_name}_${ecm_fpwc_comp}_FOUND
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REQUIRED_VARS
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${module_name}_${ecm_fpwc_comp}_LIBRARY
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${module_name}_${ecm_fpwc_comp}_INCLUDE_DIR
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${ecm_fpwc_dep_vars}
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VERSION_VAR
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${module_name}_${ecm_fpwc_comp}_VERSION
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)
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mark_as_advanced(
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${module_name}_${ecm_fpwc_comp}_LIBRARY
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${module_name}_${ecm_fpwc_comp}_INCLUDE_DIR
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)
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if(${module_name}_${ecm_fpwc_comp}_FOUND)
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list(APPEND ${module_name}_LIBRARIES
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"${${module_name}_${ecm_fpwc_comp}_LIBRARY}")
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list(APPEND ${module_name}_INCLUDE_DIRS
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"${${module_name}_${ecm_fpwc_comp}_INCLUDE_DIR}")
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set(${module_name}_DEFINITIONS
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${${module_name}_DEFINITIONS}
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${PKG_${module_name}_${ecm_fpwc_comp}_DEFINITIONS})
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if(NOT TARGET ${module_name}::${ecm_fpwc_comp})
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add_library(${module_name}::${ecm_fpwc_comp} UNKNOWN IMPORTED)
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set_target_properties(${module_name}::${ecm_fpwc_comp} PROPERTIES
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IMPORTED_LOCATION "${${module_name}_${ecm_fpwc_comp}_LIBRARY}"
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INTERFACE_COMPILE_OPTIONS "${PKG_${module_name}_${ecm_fpwc_comp}_DEFINITIONS}"
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INTERFACE_INCLUDE_DIRECTORIES "${${module_name}_${ecm_fpwc_comp}_INCLUDE_DIR}"
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INTERFACE_LINK_LIBRARIES "${ecm_fpwc_dep_targets}"
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)
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endif()
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list(APPEND ${module_name}_TARGETS
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"${module_name}::${ecm_fpwc_comp}")
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endif()
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endforeach()
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if(${module_name}_LIBRARIES)
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list(REMOVE_DUPLICATES ${module_name}_LIBRARIES)
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endif()
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if(${module_name}_INCLUDE_DIRS)
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list(REMOVE_DUPLICATES ${module_name}_INCLUDE_DIRS)
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endif()
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if(${module_name}_DEFINITIONS)
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list(REMOVE_DUPLICATES ${module_name}_DEFINITIONS)
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endif()
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if(${module_name}_TARGETS)
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list(REMOVE_DUPLICATES ${module_name}_TARGETS)
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endif()
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endmacro()
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