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383 lines
14 KiB
383 lines
14 KiB
10 years ago
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#.rst:
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# FindPackageHandleStandardArgs
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# -----------------------------
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#
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#
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#
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# FIND_PACKAGE_HANDLE_STANDARD_ARGS(<name> ... )
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#
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# This function is intended to be used in FindXXX.cmake modules files.
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# It handles the REQUIRED, QUIET and version-related arguments to
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# find_package(). It also sets the <packagename>_FOUND variable. The
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# package is considered found if all variables <var1>... listed contain
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# valid results, e.g. valid filepaths.
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#
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# There are two modes of this function. The first argument in both
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# modes is the name of the Find-module where it is called (in original
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# casing).
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#
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# The first simple mode looks like this:
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#
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# ::
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#
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# FIND_PACKAGE_HANDLE_STANDARD_ARGS(<name>
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# (DEFAULT_MSG|"Custom failure message") <var1>...<varN> )
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#
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# If the variables <var1> to <varN> are all valid, then
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# <UPPERCASED_NAME>_FOUND will be set to TRUE. If DEFAULT_MSG is given
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# as second argument, then the function will generate itself useful
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# success and error messages. You can also supply a custom error
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# message for the failure case. This is not recommended.
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#
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# The second mode is more powerful and also supports version checking:
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#
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# ::
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#
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# FIND_PACKAGE_HANDLE_STANDARD_ARGS(NAME
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# [FOUND_VAR <resultVar>]
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# [REQUIRED_VARS <var1>...<varN>]
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# [VERSION_VAR <versionvar>]
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# [HANDLE_COMPONENTS]
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# [CONFIG_MODE]
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# [FAIL_MESSAGE "Custom failure message"] )
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#
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# In this mode, the name of the result-variable can be set either to
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# either <UPPERCASED_NAME>_FOUND or <OriginalCase_Name>_FOUND using the
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# FOUND_VAR option. Other names for the result-variable are not
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# allowed. So for a Find-module named FindFooBar.cmake, the two
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# possible names are FooBar_FOUND and FOOBAR_FOUND. It is recommended
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# to use the original case version. If the FOUND_VAR option is not
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# used, the default is <UPPERCASED_NAME>_FOUND.
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#
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# As in the simple mode, if <var1> through <varN> are all valid,
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# <packagename>_FOUND will be set to TRUE. After REQUIRED_VARS the
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# variables which are required for this package are listed. Following
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# VERSION_VAR the name of the variable can be specified which holds the
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# version of the package which has been found. If this is done, this
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# version will be checked against the (potentially) specified required
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# version used in the find_package() call. The EXACT keyword is also
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# handled. The default messages include information about the required
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# version and the version which has been actually found, both if the
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# version is ok or not. If the package supports components, use the
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# HANDLE_COMPONENTS option to enable handling them. In this case,
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# find_package_handle_standard_args() will report which components have
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# been found and which are missing, and the <packagename>_FOUND variable
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# will be set to FALSE if any of the required components (i.e. not the
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# ones listed after OPTIONAL_COMPONENTS) are missing. Use the option
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# CONFIG_MODE if your FindXXX.cmake module is a wrapper for a
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# find_package(... NO_MODULE) call. In this case VERSION_VAR will be
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# set to <NAME>_VERSION and the macro will automatically check whether
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# the Config module was found. Via FAIL_MESSAGE a custom failure
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# message can be specified, if this is not used, the default message
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# will be displayed.
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#
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# Example for mode 1:
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#
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# ::
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#
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# find_package_handle_standard_args(LibXml2 DEFAULT_MSG
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# LIBXML2_LIBRARY LIBXML2_INCLUDE_DIR)
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#
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#
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#
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# LibXml2 is considered to be found, if both LIBXML2_LIBRARY and
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# LIBXML2_INCLUDE_DIR are valid. Then also LIBXML2_FOUND is set to
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# TRUE. If it is not found and REQUIRED was used, it fails with
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# FATAL_ERROR, independent whether QUIET was used or not. If it is
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# found, success will be reported, including the content of <var1>. On
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# repeated Cmake runs, the same message won't be printed again.
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#
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# Example for mode 2:
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#
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# ::
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#
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# find_package_handle_standard_args(LibXslt
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# FOUND_VAR LibXslt_FOUND
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# REQUIRED_VARS LibXslt_LIBRARIES LibXslt_INCLUDE_DIRS
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# VERSION_VAR LibXslt_VERSION_STRING)
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#
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# In this case, LibXslt is considered to be found if the variable(s)
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# listed after REQUIRED_VAR are all valid, i.e. LibXslt_LIBRARIES and
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# LibXslt_INCLUDE_DIRS in this case. The result will then be stored in
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# LibXslt_FOUND . Also the version of LibXslt will be checked by using
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# the version contained in LibXslt_VERSION_STRING. Since no
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# FAIL_MESSAGE is given, the default messages will be printed.
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#
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# Another example for mode 2:
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#
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# ::
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#
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# find_package(Automoc4 QUIET NO_MODULE HINTS /opt/automoc4)
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# find_package_handle_standard_args(Automoc4 CONFIG_MODE)
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#
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# In this case, FindAutmoc4.cmake wraps a call to find_package(Automoc4
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# NO_MODULE) and adds an additional search directory for automoc4. Here
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# the result will be stored in AUTOMOC4_FOUND. The following
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# FIND_PACKAGE_HANDLE_STANDARD_ARGS() call produces a proper
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# success/error message.
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#=============================================================================
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# Copyright 2007-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageMessage.cmake)
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include(${CMAKE_CURRENT_LIST_DIR}/CMakeParseArguments.cmake)
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# internal helper macro
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macro(_FPHSA_FAILURE_MESSAGE _msg)
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if (${_NAME}_FIND_REQUIRED)
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message(FATAL_ERROR "${_msg}")
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else ()
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if (NOT ${_NAME}_FIND_QUIETLY)
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message(STATUS "${_msg}")
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endif ()
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endif ()
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endmacro()
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# internal helper macro to generate the failure message when used in CONFIG_MODE:
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macro(_FPHSA_HANDLE_FAILURE_CONFIG_MODE)
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# <name>_CONFIG is set, but FOUND is false, this means that some other of the REQUIRED_VARS was not found:
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if(${_NAME}_CONFIG)
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_FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE}: missing: ${MISSING_VARS} (found ${${_NAME}_CONFIG} ${VERSION_MSG})")
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else()
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# If _CONSIDERED_CONFIGS is set, the config-file has been found, but no suitable version.
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# List them all in the error message:
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if(${_NAME}_CONSIDERED_CONFIGS)
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set(configsText "")
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list(LENGTH ${_NAME}_CONSIDERED_CONFIGS configsCount)
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math(EXPR configsCount "${configsCount} - 1")
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foreach(currentConfigIndex RANGE ${configsCount})
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list(GET ${_NAME}_CONSIDERED_CONFIGS ${currentConfigIndex} filename)
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list(GET ${_NAME}_CONSIDERED_VERSIONS ${currentConfigIndex} version)
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set(configsText "${configsText} ${filename} (version ${version})\n")
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endforeach()
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if (${_NAME}_NOT_FOUND_MESSAGE)
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set(configsText "${configsText} Reason given by package: ${${_NAME}_NOT_FOUND_MESSAGE}\n")
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endif()
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_FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE} ${VERSION_MSG}, checked the following files:\n${configsText}")
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else()
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# Simple case: No Config-file was found at all:
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_FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE}: found neither ${_NAME}Config.cmake nor ${_NAME_LOWER}-config.cmake ${VERSION_MSG}")
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endif()
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endif()
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endmacro()
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function(FIND_PACKAGE_HANDLE_STANDARD_ARGS _NAME _FIRST_ARG)
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# set up the arguments for CMAKE_PARSE_ARGUMENTS and check whether we are in
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# new extended or in the "old" mode:
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set(options CONFIG_MODE HANDLE_COMPONENTS)
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set(oneValueArgs FAIL_MESSAGE VERSION_VAR FOUND_VAR)
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set(multiValueArgs REQUIRED_VARS)
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set(_KEYWORDS_FOR_EXTENDED_MODE ${options} ${oneValueArgs} ${multiValueArgs} )
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list(FIND _KEYWORDS_FOR_EXTENDED_MODE "${_FIRST_ARG}" INDEX)
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if(${INDEX} EQUAL -1)
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set(FPHSA_FAIL_MESSAGE ${_FIRST_ARG})
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set(FPHSA_REQUIRED_VARS ${ARGN})
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set(FPHSA_VERSION_VAR)
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else()
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CMAKE_PARSE_ARGUMENTS(FPHSA "${options}" "${oneValueArgs}" "${multiValueArgs}" ${_FIRST_ARG} ${ARGN})
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if(FPHSA_UNPARSED_ARGUMENTS)
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message(FATAL_ERROR "Unknown keywords given to FIND_PACKAGE_HANDLE_STANDARD_ARGS(): \"${FPHSA_UNPARSED_ARGUMENTS}\"")
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endif()
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if(NOT FPHSA_FAIL_MESSAGE)
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set(FPHSA_FAIL_MESSAGE "DEFAULT_MSG")
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endif()
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endif()
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# now that we collected all arguments, process them
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if("x${FPHSA_FAIL_MESSAGE}" STREQUAL "xDEFAULT_MSG")
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set(FPHSA_FAIL_MESSAGE "Could NOT find ${_NAME}")
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endif()
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# In config-mode, we rely on the variable <package>_CONFIG, which is set by find_package()
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# when it successfully found the config-file, including version checking:
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if(FPHSA_CONFIG_MODE)
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list(INSERT FPHSA_REQUIRED_VARS 0 ${_NAME}_CONFIG)
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list(REMOVE_DUPLICATES FPHSA_REQUIRED_VARS)
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set(FPHSA_VERSION_VAR ${_NAME}_VERSION)
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endif()
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if(NOT FPHSA_REQUIRED_VARS)
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message(FATAL_ERROR "No REQUIRED_VARS specified for FIND_PACKAGE_HANDLE_STANDARD_ARGS()")
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endif()
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list(GET FPHSA_REQUIRED_VARS 0 _FIRST_REQUIRED_VAR)
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string(TOUPPER ${_NAME} _NAME_UPPER)
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string(TOLOWER ${_NAME} _NAME_LOWER)
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if(FPHSA_FOUND_VAR)
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if(FPHSA_FOUND_VAR MATCHES "^${_NAME}_FOUND$" OR FPHSA_FOUND_VAR MATCHES "^${_NAME_UPPER}_FOUND$")
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set(_FOUND_VAR ${FPHSA_FOUND_VAR})
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else()
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message(FATAL_ERROR "The argument for FOUND_VAR is \"${FPHSA_FOUND_VAR}\", but only \"${_NAME}_FOUND\" and \"${_NAME_UPPER}_FOUND\" are valid names.")
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endif()
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else()
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set(_FOUND_VAR ${_NAME_UPPER}_FOUND)
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endif()
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# collect all variables which were not found, so they can be printed, so the
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# user knows better what went wrong (#6375)
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set(MISSING_VARS "")
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set(DETAILS "")
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# check if all passed variables are valid
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unset(${_FOUND_VAR})
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foreach(_CURRENT_VAR ${FPHSA_REQUIRED_VARS})
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if(NOT ${_CURRENT_VAR})
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set(${_FOUND_VAR} FALSE)
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set(MISSING_VARS "${MISSING_VARS} ${_CURRENT_VAR}")
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else()
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set(DETAILS "${DETAILS}[${${_CURRENT_VAR}}]")
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endif()
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endforeach()
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if(NOT "${${_FOUND_VAR}}" STREQUAL "FALSE")
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set(${_FOUND_VAR} TRUE)
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endif()
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# component handling
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unset(FOUND_COMPONENTS_MSG)
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unset(MISSING_COMPONENTS_MSG)
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if(FPHSA_HANDLE_COMPONENTS)
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foreach(comp ${${_NAME}_FIND_COMPONENTS})
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if(${_NAME}_${comp}_FOUND)
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if(NOT DEFINED FOUND_COMPONENTS_MSG)
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set(FOUND_COMPONENTS_MSG "found components: ")
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endif()
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set(FOUND_COMPONENTS_MSG "${FOUND_COMPONENTS_MSG} ${comp}")
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else()
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if(NOT DEFINED MISSING_COMPONENTS_MSG)
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set(MISSING_COMPONENTS_MSG "missing components: ")
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endif()
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set(MISSING_COMPONENTS_MSG "${MISSING_COMPONENTS_MSG} ${comp}")
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if(${_NAME}_FIND_REQUIRED_${comp})
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set(${_FOUND_VAR} FALSE)
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set(MISSING_VARS "${MISSING_VARS} ${comp}")
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endif()
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endif()
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endforeach()
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set(COMPONENT_MSG "${FOUND_COMPONENTS_MSG} ${MISSING_COMPONENTS_MSG}")
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set(DETAILS "${DETAILS}[c${COMPONENT_MSG}]")
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endif()
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# version handling:
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set(VERSION_MSG "")
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set(VERSION_OK TRUE)
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set(VERSION ${${FPHSA_VERSION_VAR}})
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# check with DEFINED here as the requested or found version may be "0"
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if (DEFINED ${_NAME}_FIND_VERSION)
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if(DEFINED ${FPHSA_VERSION_VAR})
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if(${_NAME}_FIND_VERSION_EXACT) # exact version required
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# count the dots in the version string
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string(REGEX REPLACE "[^.]" "" _VERSION_DOTS "${VERSION}")
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# add one dot because there is one dot more than there are components
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string(LENGTH "${_VERSION_DOTS}." _VERSION_DOTS)
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if (_VERSION_DOTS GREATER ${_NAME}_FIND_VERSION_COUNT)
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# Because of the C++ implementation of find_package() ${_NAME}_FIND_VERSION_COUNT
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# is at most 4 here. Therefore a simple lookup table is used.
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if (${_NAME}_FIND_VERSION_COUNT EQUAL 1)
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set(_VERSION_REGEX "[^.]*")
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elseif (${_NAME}_FIND_VERSION_COUNT EQUAL 2)
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set(_VERSION_REGEX "[^.]*\\.[^.]*")
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elseif (${_NAME}_FIND_VERSION_COUNT EQUAL 3)
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set(_VERSION_REGEX "[^.]*\\.[^.]*\\.[^.]*")
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else ()
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set(_VERSION_REGEX "[^.]*\\.[^.]*\\.[^.]*\\.[^.]*")
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endif ()
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string(REGEX REPLACE "^(${_VERSION_REGEX})\\..*" "\\1" _VERSION_HEAD "${VERSION}")
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unset(_VERSION_REGEX)
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if (NOT ${_NAME}_FIND_VERSION VERSION_EQUAL _VERSION_HEAD)
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set(VERSION_MSG "Found unsuitable version \"${VERSION}\", but required is exact version \"${${_NAME}_FIND_VERSION}\"")
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set(VERSION_OK FALSE)
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else ()
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set(VERSION_MSG "(found suitable exact version \"${VERSION}\")")
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endif ()
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unset(_VERSION_HEAD)
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else ()
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if (NOT "${${_NAME}_FIND_VERSION}" VERSION_EQUAL "${VERSION}")
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set(VERSION_MSG "Found unsuitable version \"${VERSION}\", but required is exact version \"${${_NAME}_FIND_VERSION}\"")
|
||
|
|
set(VERSION_OK FALSE)
|
||
|
|
else ()
|
||
|
|
set(VERSION_MSG "(found suitable exact version \"${VERSION}\")")
|
||
|
|
endif ()
|
||
|
|
endif ()
|
||
|
|
unset(_VERSION_DOTS)
|
||
|
|
|
||
|
|
else() # minimum version specified:
|
||
|
|
if ("${${_NAME}_FIND_VERSION}" VERSION_GREATER "${VERSION}")
|
||
|
|
set(VERSION_MSG "Found unsuitable version \"${VERSION}\", but required is at least \"${${_NAME}_FIND_VERSION}\"")
|
||
|
|
set(VERSION_OK FALSE)
|
||
|
|
else ()
|
||
|
|
set(VERSION_MSG "(found suitable version \"${VERSION}\", minimum required is \"${${_NAME}_FIND_VERSION}\")")
|
||
|
|
endif ()
|
||
|
|
endif()
|
||
|
|
|
||
|
|
else()
|
||
|
|
|
||
|
|
# if the package was not found, but a version was given, add that to the output:
|
||
|
|
if(${_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 ()
|
||
|
|
if(VERSION)
|
||
|
|
set(VERSION_MSG "(found version \"${VERSION}\")")
|
||
|
|
endif()
|
||
|
|
endif ()
|
||
|
|
|
||
|
|
if(VERSION_OK)
|
||
|
|
set(DETAILS "${DETAILS}[v${VERSION}(${${_NAME}_FIND_VERSION})]")
|
||
|
|
else()
|
||
|
|
set(${_FOUND_VAR} FALSE)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
|
||
|
|
# print the result:
|
||
|
|
if (${_FOUND_VAR})
|
||
|
|
FIND_PACKAGE_MESSAGE(${_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)
|
||
|
|
_FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE}: ${VERSION_MSG} (found ${${_FIRST_REQUIRED_VAR}})")
|
||
|
|
else()
|
||
|
|
_FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE} (missing: ${MISSING_VARS}) ${VERSION_MSG}")
|
||
|
|
endif()
|
||
|
|
endif()
|
||
|
|
|
||
|
|
endif ()
|
||
|
|
|
||
|
|
set(${_FOUND_VAR} ${${_FOUND_VAR}} PARENT_SCOPE)
|
||
|
|
|
||
|
|
endfunction()
|