# FIND_PACKAGE_HANDLE_STANDARD_ARGS( ... ) # # 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 _FOUND variable. # The package is considered found if all variables ... 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( (DEFAULT_MSG|"Custom failure message") ... ) # If the variables to are all valid, then _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 ...] # [VERSION_VAR ] # [CONFIG_MODE] # [FAIL_MESSAGE "Custom failure message"] ) # # As above, if through are all valid, _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 VERSION_VAR will be set # to _VERSION and the macro will automatically check whether the # Config module was found. # 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 . # 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) # _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 _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)