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+# FIND_PACKAGE_HANDLE_STANDARD_ARGS(<name> ... )
+#
+# This function is intended to be used in FindXXX.cmake modules files.
+# It handles the REQUIRED, QUIET and version-related arguments to FIND_PACKAGE().
+# It also sets the <UPPERCASED_NAME>_FOUND variable.
+# The package is considered found if all variables <var1>... listed contain
+# valid results, e.g. valid filepaths.
+#
+# There are two modes of this function. The first argument in both modes is
+# the name of the Find-module where it is called (in original casing).
+#
+# The first simple mode looks like this:
+# FIND_PACKAGE_HANDLE_STANDARD_ARGS(<name> (DEFAULT_MSG|"Custom failure message") <var1>...<varN> )
+# If the variables <var1> to <varN> are all valid, then <UPPERCASED_NAME>_FOUND
+# will be set to TRUE.
+# If DEFAULT_MSG is given as second argument, then the function will generate
+# itself useful success and error messages. You can also supply a custom error message
+# for the failure case. This is not recommended.
+#
+# The second mode is more powerful and also supports version checking:
+# FIND_PACKAGE_HANDLE_STANDARD_ARGS(NAME [REQUIRED_VARS <var1>...<varN>]
+# [VERSION_VAR <versionvar>
+# [CONFIG_MODE]
+# [FAIL_MESSAGE "Custom failure message"] )
+#
+# As above, if <var1> through <varN> are all valid, <UPPERCASED_NAME>_FOUND
+# will be set to TRUE.
+# After REQUIRED_VARS the variables which are required for this package are listed.
+# Following VERSION_VAR the name of the variable can be specified which holds
+# the version of the package which has been found. If this is done, this version
+# will be checked against the (potentially) specified required version used
+# in the find_package() call. The EXACT keyword is also handled. 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.
+# Use the option CONFIG_MODE if your FindXXX.cmake module is a wrapper for
+# a find_package(... NO_MODULE) call, in this case all the information
+# provided by the config-mode of find_package() will be evaluated
+# automatically.
+# Via FAIL_MESSAGE a custom failure message can be specified, if this is not
+# used, the default message will be displayed.
+#
+# Example for mode 1:
+#
+# FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibXml2 DEFAULT_MSG LIBXML2_LIBRARY LIBXML2_INCLUDE_DIR)
+#
+# LibXml2 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 FATAL_ERROR,
+# independent whether QUIET was used or not.
+# If it is found, success will be reported, including the content of <var1>.
+# On repeated Cmake runs, the same message won't be printed again.
+#
+# Example for mode 2:
+#
+# FIND_PACKAGE_HANDLE_STANDARD_ARGS(BISON REQUIRED_VARS BISON_EXECUTABLE
+# VERSION_VAR BISON_VERSION)
+# In this case, BISON is considered to be found if the variable(s) listed
+# after REQUIRED_VAR are all valid, i.e. BISON_EXECUTABLE in this case.
+# Also the version of BISON will be checked by using the version contained
+# in BISON_VERSION.
+# Since no FAIL_MESSAGE is given, the default messages will be printed.
+#
+# Another example for mode 2:
+#
+# FIND_PACKAGE(Automoc4 QUIET NO_MODULE HINTS /opt/automoc4)
+# FIND_PACKAGE_HANDLE_STANDARD_ARGS(Automoc4 CONFIG_MODE)
+# In this case, FindAutmoc4.cmake wraps a call to FIND_PACKAGE(Automoc4 NO_MODULE)
+# and adds an additional search directory for automoc4.
+# The following FIND_PACKAGE_HANDLE_STANDARD_ARGS() call produces a proper
+# success/error message.
+
+#=============================================================================
+# Copyright 2007-2009 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+# License text for the above reference.)
+
+INCLUDE(FindPackageMessage)
+INCLUDE(CMakeParseArguments)
+
+# internal helper macro
+MACRO(_FPHSA_FAILURE_MESSAGE _msg)
+ IF (${_NAME}_FIND_REQUIRED)
+ MESSAGE(FATAL_ERROR "${_msg}")
+ ELSE (${_NAME}_FIND_REQUIRED)
+ IF (NOT ${_NAME}_FIND_QUIETLY)
+ MESSAGE(STATUS "${_msg}")
+ ENDIF (NOT ${_NAME}_FIND_QUIETLY)
+ ENDIF (${_NAME}_FIND_REQUIRED)
+ENDMACRO(_FPHSA_FAILURE_MESSAGE _msg)
+
+
+# internal helper macro to generate the failure message when used in CONFIG_MODE:
+MACRO(_FPHSA_HANDLE_FAILURE_CONFIG_MODE)
+ # <name>_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} ${VERSION_MSG})")
+ ELSE(${_NAME}_CONFIG)
+ # 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 ${currentConfigIndex} version)
+ SET(configsText "${configsText} ${filename} (version ${version})\n")
+ ENDFOREACH(currentConfigIndex)
+ _FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE} ${VERSION_MSG}, checked the following files:\n${configsText}")
+
+ ELSE(${_NAME}_CONSIDERED_CONFIGS)
+ # Simple case: No Config-file was found at all:
+ _FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE}: found neither ${_NAME}Config.cmake nor ${_NAME_LOWER}-config.cmake ${VERSION_MSG}")
+ ENDIF(${_NAME}_CONSIDERED_CONFIGS)
+ ENDIF(${_NAME}_CONFIG)
+ENDMACRO(_FPHSA_HANDLE_FAILURE_CONFIG_MODE)
+
+
+FUNCTION(FIND_PACKAGE_HANDLE_STANDARD_ARGS _NAME _FIRST_ARG)
+
+# set up the arguments for CMAKE_PARSE_ARGUMENTS and check whether we are in
+# new extended or in the "old" mode:
+ SET(options CONFIG_MODE)
+ SET(oneValueArgs FAIL_MESSAGE VERSION_VAR)
+ SET(multiValueArgs REQUIRED_VARS)
+ SET(_KEYWORDS_FOR_EXTENDED_MODE ${options} ${oneValueArgs} ${multiValueArgs} )
+ LIST(FIND _KEYWORDS_FOR_EXTENDED_MODE "${_FIRST_ARG}" INDEX)
+
+ IF(${INDEX} EQUAL -1)
+ SET(FPHSA_FAIL_MESSAGE ${_FIRST_ARG})
+ SET(FPHSA_REQUIRED_VARS ${ARGN})
+ SET(FPHSA_VERSION_VAR)
+ ELSE(${INDEX} EQUAL -1)
+
+ 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(FPHSA_UNPARSED_ARGUMENTS)
+
+ IF(NOT FPHSA_FAIL_MESSAGE)
+ SET(FPHSA_FAIL_MESSAGE "DEFAULT_MSG")
+ ENDIF(NOT FPHSA_FAIL_MESSAGE)
+ ENDIF(${INDEX} EQUAL -1)
+
+# now that we collected all arguments, process them
+
+ IF("${FPHSA_FAIL_MESSAGE}" STREQUAL "DEFAULT_MSG")
+ SET(FPHSA_FAIL_MESSAGE "Could NOT find ${_NAME}")
+ ENDIF("${FPHSA_FAIL_MESSAGE}" STREQUAL "DEFAULT_MSG")
+
+ # In config-mode, we rely on the variable <package>_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(FPHSA_CONFIG_MODE)
+
+ IF(NOT FPHSA_REQUIRED_VARS)
+ MESSAGE(FATAL_ERROR "No REQUIRED_VARS specified for FIND_PACKAGE_HANDLE_STANDARD_ARGS()")
+ ENDIF(NOT FPHSA_REQUIRED_VARS)
+
+ LIST(GET FPHSA_REQUIRED_VARS 0 _FIRST_REQUIRED_VAR)
+
+ STRING(TOUPPER ${_NAME} _NAME_UPPER)
+ STRING(TOLOWER ${_NAME} _NAME_LOWER)
+
+ # collect all variables which were not found, so they can be printed, so the
+ # user knows better what went wrong (#6375)
+ SET(MISSING_VARS "")
+ SET(DETAILS "")
+ SET(${_NAME_UPPER}_FOUND TRUE)
+ # check if all passed variables are valid
+ FOREACH(_CURRENT_VAR ${FPHSA_REQUIRED_VARS})
+ IF(NOT ${_CURRENT_VAR})
+ SET(${_NAME_UPPER}_FOUND FALSE)
+ SET(MISSING_VARS "${MISSING_VARS} ${_CURRENT_VAR}")
+ ELSE(NOT ${_CURRENT_VAR})
+ SET(DETAILS "${DETAILS}[${${_CURRENT_VAR}}]")
+ ENDIF(NOT ${_CURRENT_VAR})
+ ENDFOREACH(_CURRENT_VAR)
+
+
+ # version handling:
+ SET(VERSION_MSG "")
+ SET(VERSION_OK TRUE)
+ SET(VERSION ${${FPHSA_VERSION_VAR}} )
+ IF (${_NAME}_FIND_VERSION)
+
+ IF(VERSION)
+
+ IF(${_NAME}_FIND_VERSION_EXACT) # exact version required
+ IF (NOT "${${_NAME}_FIND_VERSION}" VERSION_EQUAL "${VERSION}")
+ SET(VERSION_MSG "Found unsuitable version \"${VERSION}\", but required is exact version \"${${_NAME}_FIND_VERSION}\"")
+ SET(VERSION_OK FALSE)
+ ELSE (NOT "${${_NAME}_FIND_VERSION}" VERSION_EQUAL "${VERSION}")
+ SET(VERSION_MSG "(found suitable exact version \"${VERSION}\")")
+ ENDIF (NOT "${${_NAME}_FIND_VERSION}" VERSION_EQUAL "${VERSION}")
+
+ ELSE(${_NAME}_FIND_VERSION_EXACT) # 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 ("${${_NAME}_FIND_VERSION}" VERSION_GREATER "${VERSION}")
+ SET(VERSION_MSG "(found suitable version \"${VERSION}\", required is \"${${_NAME}_FIND_VERSION}\")")
+ ENDIF ("${${_NAME}_FIND_VERSION}" VERSION_GREATER "${VERSION}")
+ ENDIF(${_NAME}_FIND_VERSION_EXACT)
+
+ ELSE(VERSION)
+
+ # if the package was not found, but a version was given, add that to the output:
+ IF(${_NAME}_FIND_VERSION_EXACT)
+ SET(VERSION_MSG "(Required is exact version \"${${_NAME}_FIND_VERSION}\")")
+ ELSE(${_NAME}_FIND_VERSION_EXACT)
+ SET(VERSION_MSG "(Required is at least version \"${${_NAME}_FIND_VERSION}\")")
+ ENDIF(${_NAME}_FIND_VERSION_EXACT)
+
+ ENDIF(VERSION)
+ ELSE (${_NAME}_FIND_VERSION)
+ IF(VERSION)
+ SET(VERSION_MSG "(found version \"${VERSION}\")")
+ ENDIF(VERSION)
+ ENDIF (${_NAME}_FIND_VERSION)
+
+ IF(VERSION_OK)
+ SET(DETAILS "${DETAILS}[v${VERSION}(${${_NAME}_FIND_VERSION})]")
+ ELSE(VERSION_OK)
+ SET(${_NAME_UPPER}_FOUND FALSE)
+ ENDIF(VERSION_OK)
+
+
+ # print the result:
+ IF (${_NAME_UPPER}_FOUND)
+ FIND_PACKAGE_MESSAGE(${_NAME} "Found ${_NAME}: ${${_FIRST_REQUIRED_VAR}} ${VERSION_MSG}" "${DETAILS}")
+ ELSE (${_NAME_UPPER}_FOUND)
+
+ IF(FPHSA_CONFIG_MODE)
+ _FPHSA_HANDLE_FAILURE_CONFIG_MODE()
+ ELSE(FPHSA_CONFIG_MODE)
+ IF(NOT VERSION_OK)
+ _FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE}: ${VERSION_MSG} (found ${${_FIRST_REQUIRED_VAR}})")
+ ELSE(NOT VERSION_OK)
+ _FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE} (missing: ${MISSING_VARS}) ${VERSION_MSG}")
+ ENDIF(NOT VERSION_OK)
+ ENDIF(FPHSA_CONFIG_MODE)
+
+ ENDIF (${_NAME_UPPER}_FOUND)
+
+ SET(${_NAME_UPPER}_FOUND ${${_NAME_UPPER}_FOUND} PARENT_SCOPE)
+
+ENDFUNCTION(FIND_PACKAGE_HANDLE_STANDARD_ARGS _FIRST_ARG)
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