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63 lines
2.1 KiB
CMake
63 lines
2.1 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#[=======================================================================[.rst:
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CMakeFindDependencyMacro
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-------------------------
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.. command:: find_dependency
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The ``find_dependency()`` macro wraps a :command:`find_package` call for
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a package dependency::
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find_dependency(<dep> [...])
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It is designed to be used in a
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:ref:`Package Configuration File <Config File Packages>`
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(``<PackageName>Config.cmake``). ``find_dependency`` forwards the correct
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parameters for ``QUIET`` and ``REQUIRED`` which were passed to
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the original :command:`find_package` call. Any additional arguments
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specified are forwarded to :command:`find_package`.
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If the dependency could not be found it sets an informative diagnostic
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message and calls :command:`return` to end processing of the calling
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package configuration file and return to the :command:`find_package`
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command that loaded it.
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.. note::
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The call to :command:`return` makes this macro unsuitable to call
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from :ref:`Find Modules`.
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#]=======================================================================]
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macro(find_dependency dep)
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set(cmake_fd_quiet_arg)
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if(${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY)
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set(cmake_fd_quiet_arg QUIET)
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endif()
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set(cmake_fd_required_arg)
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if(${CMAKE_FIND_PACKAGE_NAME}_FIND_REQUIRED)
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set(cmake_fd_required_arg REQUIRED)
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endif()
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get_property(cmake_fd_alreadyTransitive GLOBAL PROPERTY
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_CMAKE_${dep}_TRANSITIVE_DEPENDENCY
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)
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find_package(${dep} ${ARGN}
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${cmake_fd_quiet_arg}
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${cmake_fd_required_arg}
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)
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if(NOT DEFINED cmake_fd_alreadyTransitive OR cmake_fd_alreadyTransitive)
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set_property(GLOBAL PROPERTY _CMAKE_${dep}_TRANSITIVE_DEPENDENCY TRUE)
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endif()
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if (NOT ${dep}_FOUND)
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set(${CMAKE_FIND_PACKAGE_NAME}_NOT_FOUND_MESSAGE "${CMAKE_FIND_PACKAGE_NAME} could not be found because dependency ${dep} could not be found.")
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set(${CMAKE_FIND_PACKAGE_NAME}_FOUND False)
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return()
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endif()
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set(cmake_fd_required_arg)
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set(cmake_fd_quiet_arg)
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endmacro()
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