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+# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#[=======================================================================[.rst:
+FindPackageHandleStandardArgs
+-----------------------------
+
+This module provides a function intended to be used in :ref:`Find Modules`
+implementing :command:`find_package(<PackageName>)` calls. It handles the
+``REQUIRED``, ``QUIET`` and version-related arguments of ``find_package``.
+It also sets the ``<PackageName>_FOUND`` variable. The package is
+considered found if all variables listed contain valid results, e.g.
+valid filepaths.
+
+.. command:: find_package_handle_standard_args
+
+ There are two signatures::
+
+ find_package_handle_standard_args(<PackageName>
+ (DEFAULT_MSG|<custom-failure-message>)
+ <required-var>...
+ )
+
+ find_package_handle_standard_args(<PackageName>
+ [FOUND_VAR <result-var>]
+ [REQUIRED_VARS <required-var>...]
+ [VERSION_VAR <version-var>]
+ [HANDLE_COMPONENTS]
+ [CONFIG_MODE]
+ [NAME_MISMATCHED]
+ [REASON_FAILURE_MESSAGE <reason-failure-message>]
+ [FAIL_MESSAGE <custom-failure-message>]
+ )
+
+ The ``<PackageName>_FOUND`` variable will be set to ``TRUE`` if all
+ the variables ``<required-var>...`` are valid and any optional
+ constraints are satisfied, and ``FALSE`` otherwise. A success or
+ failure message may be displayed based on the results and on
+ whether the ``REQUIRED`` and/or ``QUIET`` option was given to
+ the :command:`find_package` call.
+
+ The options are:
+
+ ``(DEFAULT_MSG|<custom-failure-message>)``
+ In the simple signature this specifies the failure message.
+ Use ``DEFAULT_MSG`` to ask for a default message to be computed
+ (recommended). Not valid in the full signature.
+
+ ``FOUND_VAR <result-var>``
+ Obsolete. Specifies either ``<PackageName>_FOUND`` or
+ ``<PACKAGENAME>_FOUND`` as the result variable. This exists only
+ for compatibility with older versions of CMake and is now ignored.
+ Result variables of both names are always set for compatibility.
+
+ ``REQUIRED_VARS <required-var>...``
+ Specify the variables which are required for this package.
+ These may be named in the generated failure message asking the
+ user to set the missing variable values. Therefore these should
+ typically be cache entries such as ``FOO_LIBRARY`` and not output
+ variables like ``FOO_LIBRARIES``. This option is mandatory if
+ ``HANDLE_COMPONENTS`` is not specified.
+
+ ``VERSION_VAR <version-var>``
+ Specify the name of a variable that holds the version of the package
+ that has been found. This version will be checked against the
+ (potentially) specified required version given to the
+ :command:`find_package` call, including its ``EXACT`` option.
+ The default messages include information about the required
+ version and the version which has been actually found, both
+ if the version is ok or not.
+
+ ``HANDLE_COMPONENTS``
+ Enable handling of package components. In this case, the command
+ will report which components have been found and which are missing,
+ and the ``<PackageName>_FOUND`` variable will be set to ``FALSE``
+ if any of the required components (i.e. not the ones listed after
+ the ``OPTIONAL_COMPONENTS`` option of :command:`find_package`) are
+ missing.
+
+ ``CONFIG_MODE``
+ Specify that the calling find module is a wrapper around a
+ call to ``find_package(<PackageName> NO_MODULE)``. This implies
+ a ``VERSION_VAR`` value of ``<PackageName>_VERSION``. The command
+ will automatically check whether the package configuration file
+ was found.
+
+ ``REASON_FAILURE_MESSAGE <reason-failure-message>``
+ Specify a custom message of the reason for the failure which will be
+ appended to the default generated message.
+
+ ``FAIL_MESSAGE <custom-failure-message>``
+ Specify a custom failure message instead of using the default
+ generated message. Not recommended.
+
+ ``NAME_MISMATCHED``
+ Indicate that the ``<PackageName>`` does not match
+ ``${CMAKE_FIND_PACKAGE_NAME}``. This is usually a mistake and raises a
+ warning, but it may be intentional for usage of the command for components
+ of a larger package.
+
+Example for the simple signature:
+
+.. code-block:: cmake
+
+ find_package_handle_standard_args(LibXml2 DEFAULT_MSG
+ LIBXML2_LIBRARY LIBXML2_INCLUDE_DIR)
+
+The ``LibXml2`` package is considered to be found if both
+``LIBXML2_LIBRARY`` and ``LIBXML2_INCLUDE_DIR`` are valid.
+Then also ``LibXml2_FOUND`` is set to ``TRUE``. If it is not found
+and ``REQUIRED`` was used, it fails with a
+:command:`message(FATAL_ERROR)`, independent whether ``QUIET`` was
+used or not. If it is found, success will be reported, including
+the content of the first ``<required-var>``. On repeated CMake runs,
+the same message will not be printed again.
+
+.. note::
+
+ If ``<PackageName>`` does not match ``CMAKE_FIND_PACKAGE_NAME`` for the
+ calling module, a warning that there is a mismatch is given. The
+ ``FPHSA_NAME_MISMATCHED`` variable may be set to bypass the warning if using
+ the old signature and the ``NAME_MISMATCHED`` argument using the new
+ signature. To avoid forcing the caller to require newer versions of CMake for
+ usage, the variable's value will be used if defined when the
+ ``NAME_MISMATCHED`` argument is not passed for the new signature (but using
+ both is an error)..
+
+Example for the full signature:
+
+.. code-block:: cmake
+
+ find_package_handle_standard_args(LibArchive
+ REQUIRED_VARS LibArchive_LIBRARY LibArchive_INCLUDE_DIR
+ VERSION_VAR LibArchive_VERSION)
+
+In this case, the ``LibArchive`` package is considered to be found if
+both ``LibArchive_LIBRARY`` and ``LibArchive_INCLUDE_DIR`` are valid.
+Also the version of ``LibArchive`` will be checked by using the version
+contained in ``LibArchive_VERSION``. Since no ``FAIL_MESSAGE`` is given,
+the default messages will be printed.
+
+Another example for the full signature:
+
+.. code-block:: cmake
+
+ find_package(Automoc4 QUIET NO_MODULE HINTS /opt/automoc4)
+ find_package_handle_standard_args(Automoc4 CONFIG_MODE)
+
+In this case, a ``FindAutmoc4.cmake`` module wraps a call to
+``find_package(Automoc4 NO_MODULE)`` and adds an additional search
+directory for ``automoc4``. Then the call to
+``find_package_handle_standard_args`` produces a proper success/failure
+message.
+#]=======================================================================]
+
+include(${CMAKE_CURRENT_LIST_DIR}/FindPackageMessage.cmake)
+
+# internal helper macro
+macro(_FPHSA_FAILURE_MESSAGE _msg)
+ set (__msg "${_msg}")
+ if (FPHSA_REASON_FAILURE_MESSAGE)
+ string(APPEND __msg "\n Reason given by package: ${FPHSA_REASON_FAILURE_MESSAGE}\n")
+ endif()
+ if (${_NAME}_FIND_REQUIRED)
+ message(FATAL_ERROR "${__msg}")
+ else ()
+ if (NOT ${_NAME}_FIND_QUIETLY)
+ message(STATUS "${__msg}")
+ endif ()
+ endif ()
+endmacro()
+
+
+# internal helper macro to generate the failure message when used in CONFIG_MODE:
+macro(_FPHSA_HANDLE_FAILURE_CONFIG_MODE)
+ # <PackageName>_CONFIG is set, but FOUND is false, this means that some other of the REQUIRED_VARS was not found:
+ if(${_NAME}_CONFIG)
+ _FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE}: missing:${MISSING_VARS} (found ${${_NAME}_CONFIG} ${VERSION_MSG})")
+ else()
+ # If _CONSIDERED_CONFIGS is set, the config-file has been found, but no suitable version.
+ # List them all in the error message:
+ if(${_NAME}_CONSIDERED_CONFIGS)
+ set(configsText "")
+ list(LENGTH ${_NAME}_CONSIDERED_CONFIGS configsCount)
+ math(EXPR configsCount "${configsCount} - 1")
+ foreach(currentConfigIndex RANGE ${configsCount})
+ list(GET ${_NAME}_CONSIDERED_CONFIGS ${currentConfigIndex} filename)
+ list(GET ${_NAME}_CONSIDERED_VERSIONS ${currentConfigIndex} version)
+ string(APPEND configsText "\n ${filename} (version ${version})")
+ endforeach()
+ if (${_NAME}_NOT_FOUND_MESSAGE)
+ if (FPHSA_REASON_FAILURE_MESSAGE)
+ string(PREPEND FPHSA_REASON_FAILURE_MESSAGE "${${_NAME}_NOT_FOUND_MESSAGE}\n ")
+ else()
+ set(FPHSA_REASON_FAILURE_MESSAGE "${${_NAME}_NOT_FOUND_MESSAGE}")
+ endif()
+ else()
+ string(APPEND configsText "\n")
+ endif()
+ _FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE} ${VERSION_MSG}, checked the following files:${configsText}")
+
+ else()
+ # Simple case: No Config-file was found at all:
+ _FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE}: found neither ${_NAME}Config.cmake nor ${_NAME_LOWER}-config.cmake ${VERSION_MSG}")
+ endif()
+ endif()
+endmacro()
+
+
+function(FIND_PACKAGE_HANDLE_STANDARD_ARGS _NAME _FIRST_ARG)
+
+ # Set up the arguments for `cmake_parse_arguments`.
+ set(options CONFIG_MODE HANDLE_COMPONENTS NAME_MISMATCHED)
+ set(oneValueArgs FAIL_MESSAGE REASON_FAILURE_MESSAGE VERSION_VAR FOUND_VAR)
+ set(multiValueArgs REQUIRED_VARS)
+
+ # Check whether we are in 'simple' or 'extended' mode:
+ set(_KEYWORDS_FOR_EXTENDED_MODE ${options} ${oneValueArgs} ${multiValueArgs} )
+ list(FIND _KEYWORDS_FOR_EXTENDED_MODE "${_FIRST_ARG}" INDEX)
+
+ unset(FPHSA_NAME_MISMATCHED_override)
+ if (DEFINED FPHSA_NAME_MISMATCHED)
+ # If the variable NAME_MISMATCHED variable is set, error if it is passed as
+ # an argument. The former is for old signatures, the latter is for new
+ # signatures.
+ list(FIND ARGN "NAME_MISMATCHED" name_mismatched_idx)
+ if (NOT name_mismatched_idx EQUAL "-1")
+ message(FATAL_ERROR
+ "The `NAME_MISMATCHED` argument may only be specified by the argument or "
+ "the variable, not both.")
+ endif ()
+
+ # But use the variable if it is not an argument to avoid forcing minimum
+ # CMake version bumps for calling modules.
+ set(FPHSA_NAME_MISMATCHED_override "${FPHSA_NAME_MISMATCHED}")
+ endif ()
+
+ if(${INDEX} EQUAL -1)
+ set(FPHSA_FAIL_MESSAGE ${_FIRST_ARG})
+ set(FPHSA_REQUIRED_VARS ${ARGN})
+ set(FPHSA_VERSION_VAR)
+ else()
+ cmake_parse_arguments(FPHSA "${options}" "${oneValueArgs}" "${multiValueArgs}" ${_FIRST_ARG} ${ARGN})
+
+ if(FPHSA_UNPARSED_ARGUMENTS)
+ message(FATAL_ERROR "Unknown keywords given to FIND_PACKAGE_HANDLE_STANDARD_ARGS(): \"${FPHSA_UNPARSED_ARGUMENTS}\"")
+ endif()
+
+ if(NOT FPHSA_FAIL_MESSAGE)
+ set(FPHSA_FAIL_MESSAGE "DEFAULT_MSG")
+ endif()
+
+ # In config-mode, we rely on the variable <PackageName>_CONFIG, which is set by find_package()
+ # when it successfully found the config-file, including version checking:
+ if(FPHSA_CONFIG_MODE)
+ list(INSERT FPHSA_REQUIRED_VARS 0 ${_NAME}_CONFIG)
+ list(REMOVE_DUPLICATES FPHSA_REQUIRED_VARS)
+ set(FPHSA_VERSION_VAR ${_NAME}_VERSION)
+ endif()
+
+ if(NOT FPHSA_REQUIRED_VARS AND NOT FPHSA_HANDLE_COMPONENTS)
+ message(FATAL_ERROR "No REQUIRED_VARS specified for FIND_PACKAGE_HANDLE_STANDARD_ARGS()")
+ endif()
+ endif()
+
+ if (DEFINED FPHSA_NAME_MISMATCHED_override)
+ set(FPHSA_NAME_MISMATCHED "${FPHSA_NAME_MISMATCHED_override}")
+ endif ()
+
+ if (DEFINED CMAKE_FIND_PACKAGE_NAME
+ AND NOT FPHSA_NAME_MISMATCHED
+ AND NOT _NAME STREQUAL CMAKE_FIND_PACKAGE_NAME)
+ message(AUTHOR_WARNING
+ "The package name passed to `find_package_handle_standard_args` "
+ "(${_NAME}) does not match the name of the calling package "
+ "(${CMAKE_FIND_PACKAGE_NAME}). This can lead to problems in calling "
+ "code that expects `find_package` result variables (e.g., `_FOUND`) "
+ "to follow a certain pattern.")
+ endif ()
+
+# now that we collected all arguments, process them
+
+ if("x${FPHSA_FAIL_MESSAGE}" STREQUAL "xDEFAULT_MSG")
+ set(FPHSA_FAIL_MESSAGE "Could NOT find ${_NAME}")
+ endif()
+
+ if (FPHSA_REQUIRED_VARS)
+ list(GET FPHSA_REQUIRED_VARS 0 _FIRST_REQUIRED_VAR)
+ endif()
+
+ string(TOUPPER ${_NAME} _NAME_UPPER)
+ string(TOLOWER ${_NAME} _NAME_LOWER)
+
+ if(FPHSA_FOUND_VAR)
+ set(_FOUND_VAR_UPPER ${_NAME_UPPER}_FOUND)
+ set(_FOUND_VAR_MIXED ${_NAME}_FOUND)
+ if(FPHSA_FOUND_VAR STREQUAL _FOUND_VAR_MIXED OR FPHSA_FOUND_VAR STREQUAL _FOUND_VAR_UPPER)
+ set(_FOUND_VAR ${FPHSA_FOUND_VAR})
+ else()
+ message(FATAL_ERROR "The argument for FOUND_VAR is \"${FPHSA_FOUND_VAR}\", but only \"${_FOUND_VAR_MIXED}\" and \"${_FOUND_VAR_UPPER}\" are valid names.")
+ endif()
+ else()
+ set(_FOUND_VAR ${_NAME_UPPER}_FOUND)
+ endif()
+
+ # collect all variables which were not found, so they can be printed, so the
+ # user knows better what went wrong (#6375)
+ set(MISSING_VARS "")
+ set(DETAILS "")
+ # check if all passed variables are valid
+ set(FPHSA_FOUND_${_NAME} TRUE)
+ foreach(_CURRENT_VAR ${FPHSA_REQUIRED_VARS})
+ if(NOT ${_CURRENT_VAR})
+ set(FPHSA_FOUND_${_NAME} FALSE)
+ string(APPEND MISSING_VARS " ${_CURRENT_VAR}")
+ else()
+ string(APPEND DETAILS "[${${_CURRENT_VAR}}]")
+ endif()
+ endforeach()
+ if(FPHSA_FOUND_${_NAME})
+ set(${_NAME}_FOUND TRUE)
+ set(${_NAME_UPPER}_FOUND TRUE)
+ else()
+ set(${_NAME}_FOUND FALSE)
+ set(${_NAME_UPPER}_FOUND FALSE)
+ endif()
+
+ # component handling
+ unset(FOUND_COMPONENTS_MSG)
+ unset(MISSING_COMPONENTS_MSG)
+
+ if(FPHSA_HANDLE_COMPONENTS)
+ foreach(comp ${${_NAME}_FIND_COMPONENTS})
+ if(${_NAME}_${comp}_FOUND)
+
+ if(NOT DEFINED FOUND_COMPONENTS_MSG)
+ set(FOUND_COMPONENTS_MSG "found components:")
+ endif()
+ string(APPEND FOUND_COMPONENTS_MSG " ${comp}")
+
+ else()
+
+ if(NOT DEFINED MISSING_COMPONENTS_MSG)
+ set(MISSING_COMPONENTS_MSG "missing components:")
+ endif()
+ string(APPEND MISSING_COMPONENTS_MSG " ${comp}")
+
+ if(${_NAME}_FIND_REQUIRED_${comp})
+ set(${_NAME}_FOUND FALSE)
+ string(APPEND MISSING_VARS " ${comp}")
+ endif()
+
+ endif()
+ endforeach()
+ set(COMPONENT_MSG "${FOUND_COMPONENTS_MSG} ${MISSING_COMPONENTS_MSG}")
+ string(APPEND DETAILS "[c${COMPONENT_MSG}]")
+ endif()
+
+ # version handling:
+ set(VERSION_MSG "")
+ set(VERSION_OK TRUE)
+
+ # check with DEFINED here as the requested or found version may be "0"
+ if (DEFINED ${_NAME}_FIND_VERSION)
+ if(DEFINED ${FPHSA_VERSION_VAR})
+ set(_FOUND_VERSION ${${FPHSA_VERSION_VAR}})
+
+ if(${_NAME}_FIND_VERSION_EXACT) # exact version required
+ # count the dots in the version string
+ string(REGEX REPLACE "[^.]" "" _VERSION_DOTS "${_FOUND_VERSION}")
+ # add one dot because there is one dot more than there are components
+ string(LENGTH "${_VERSION_DOTS}." _VERSION_DOTS)
+ if (_VERSION_DOTS GREATER ${_NAME}_FIND_VERSION_COUNT)
+ # Because of the C++ implementation of find_package() ${_NAME}_FIND_VERSION_COUNT
+ # is at most 4 here. Therefore a simple lookup table is used.
+ if (${_NAME}_FIND_VERSION_COUNT EQUAL 1)
+ set(_VERSION_REGEX "[^.]*")
+ elseif (${_NAME}_FIND_VERSION_COUNT EQUAL 2)
+ set(_VERSION_REGEX "[^.]*\\.[^.]*")
+ elseif (${_NAME}_FIND_VERSION_COUNT EQUAL 3)
+ set(_VERSION_REGEX "[^.]*\\.[^.]*\\.[^.]*")
+ else ()
+ set(_VERSION_REGEX "[^.]*\\.[^.]*\\.[^.]*\\.[^.]*")
+ endif ()
+ string(REGEX REPLACE "^(${_VERSION_REGEX})\\..*" "\\1" _VERSION_HEAD "${_FOUND_VERSION}")
+ unset(_VERSION_REGEX)
+ if (NOT ${_NAME}_FIND_VERSION VERSION_EQUAL _VERSION_HEAD)
+ set(VERSION_MSG "Found unsuitable version \"${_FOUND_VERSION}\", but required is exact version \"${${_NAME}_FIND_VERSION}\"")
+ set(VERSION_OK FALSE)
+ else ()
+ set(VERSION_MSG "(found suitable exact version \"${_FOUND_VERSION}\")")
+ endif ()
+ unset(_VERSION_HEAD)
+ else ()
+ if (NOT ${_NAME}_FIND_VERSION VERSION_EQUAL _FOUND_VERSION)
+ set(VERSION_MSG "Found unsuitable version \"${_FOUND_VERSION}\", but required is exact version \"${${_NAME}_FIND_VERSION}\"")
+ set(VERSION_OK FALSE)
+ else ()
+ set(VERSION_MSG "(found suitable exact version \"${_FOUND_VERSION}\")")
+ endif ()
+ endif ()
+ unset(_VERSION_DOTS)
+
+ else() # minimum version specified:
+ if (${_NAME}_FIND_VERSION VERSION_GREATER _FOUND_VERSION)
+ set(VERSION_MSG "Found unsuitable version \"${_FOUND_VERSION}\", but required is at least \"${${_NAME}_FIND_VERSION}\"")
+ set(VERSION_OK FALSE)
+ else ()
+ set(VERSION_MSG "(found suitable version \"${_FOUND_VERSION}\", minimum required is \"${${_NAME}_FIND_VERSION}\")")
+ endif ()
+ endif()
+
+ else()
+
+ # if the package was not found, but a version was given, add that to the output:
+ if(${_NAME}_FIND_VERSION_EXACT)
+ set(VERSION_MSG "(Required is exact version \"${${_NAME}_FIND_VERSION}\")")
+ else()
+ set(VERSION_MSG "(Required is at least version \"${${_NAME}_FIND_VERSION}\")")
+ endif()
+
+ endif()
+ else ()
+ # Check with DEFINED as the found version may be 0.
+ if(DEFINED ${FPHSA_VERSION_VAR})
+ set(VERSION_MSG "(found version \"${${FPHSA_VERSION_VAR}}\")")
+ endif()
+ endif ()
+
+ if(VERSION_OK)
+ string(APPEND DETAILS "[v${${FPHSA_VERSION_VAR}}(${${_NAME}_FIND_VERSION})]")
+ else()
+ set(${_NAME}_FOUND FALSE)
+ endif()
+
+
+ # print the result:
+ if (${_NAME}_FOUND)
+ FIND_PACKAGE_MESSAGE(${_NAME} "Found ${_NAME}: ${${_FIRST_REQUIRED_VAR}} ${VERSION_MSG} ${COMPONENT_MSG}" "${DETAILS}")
+ else ()
+
+ if(FPHSA_CONFIG_MODE)
+ _FPHSA_HANDLE_FAILURE_CONFIG_MODE()
+ else()
+ if(NOT VERSION_OK)
+ set(RESULT_MSG)
+ if (_FIRST_REQUIRED_VAR)
+ string (APPEND RESULT_MSG "found ${${_FIRST_REQUIRED_VAR}}")
+ endif()
+ if (COMPONENT_MSG)
+ if (RESULT_MSG)
+ string (APPEND RESULT_MSG ", ")
+ endif()
+ string (APPEND RESULT_MSG "${FOUND_COMPONENTS_MSG}")
+ endif()
+ _FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE}: ${VERSION_MSG} (${RESULT_MSG})")
+ else()
+ _FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE} (missing:${MISSING_VARS}) ${VERSION_MSG}")
+ endif()
+ endif()
+
+ endif ()
+
+ set(${_NAME}_FOUND ${${_NAME}_FOUND} PARENT_SCOPE)
+ set(${_NAME_UPPER}_FOUND ${${_NAME}_FOUND} PARENT_SCOPE)
+endfunction()