You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
397 lines
15 KiB
397 lines
15 KiB
#[=======================================================================[.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]
|
|
[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>``
|
|
Obselete. 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``.
|
|
|
|
``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.
|
|
|
|
``FAIL_MESSAGE <custom-failure-message>``
|
|
Specify a custom failure message instead of using the default
|
|
generated message. Not recommended.
|
|
|
|
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.
|
|
|
|
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.
|
|
#]=======================================================================]
|
|
|
|
#=============================================================================
|
|
# 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(${CMAKE_CURRENT_LIST_DIR}/FindPackageMessage.cmake)
|
|
include(${CMAKE_CURRENT_LIST_DIR}/CMakeParseArguments.cmake)
|
|
|
|
# internal helper macro
|
|
macro(_FPHSA_FAILURE_MESSAGE _msg)
|
|
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)
|
|
# <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} ${VERSION_MSG})")
|
|
else()
|
|
# If _CONSIDERED_CONFIGS is set, the config-file has been found, but no suitable version.
|
|
# List them all in the error message:
|
|
if(${_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 ${version})\n")
|
|
endforeach()
|
|
if (${_NAME}_NOT_FOUND_MESSAGE)
|
|
set(configsText "${configsText} Reason given by package: ${${_NAME}_NOT_FOUND_MESSAGE}\n")
|
|
endif()
|
|
_FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE} ${VERSION_MSG}, checked the following files:\n${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 and check whether we are in
|
|
# new extended or in the "old" mode:
|
|
set(options CONFIG_MODE HANDLE_COMPONENTS)
|
|
set(oneValueArgs FAIL_MESSAGE VERSION_VAR FOUND_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 ${ARGN})
|
|
set(FPHSA_VERSION_VAR)
|
|
else()
|
|
|
|
CMAKE_PARSE_ARGUMENTS(FPHSA "${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()
|
|
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()
|
|
|
|
# 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()
|
|
|
|
if(NOT FPHSA_REQUIRED_VARS)
|
|
message(FATAL_ERROR "No REQUIRED_VARS specified for FIND_PACKAGE_HANDLE_STANDARD_ARGS()")
|
|
endif()
|
|
|
|
list(GET FPHSA_REQUIRED_VARS 0 _FIRST_REQUIRED_VAR)
|
|
|
|
string(TOUPPER ${_NAME} _NAME_UPPER)
|
|
string(TOLOWER ${_NAME} _NAME_LOWER)
|
|
|
|
if(FPHSA_FOUND_VAR)
|
|
if(FPHSA_FOUND_VAR MATCHES "^${_NAME}_FOUND$" OR FPHSA_FOUND_VAR MATCHES "^${_NAME_UPPER}_FOUND$")
|
|
set(_FOUND_VAR ${FPHSA_FOUND_VAR})
|
|
else()
|
|
message(FATAL_ERROR "The argument for FOUND_VAR is \"${FPHSA_FOUND_VAR}\", but only \"${_NAME}_FOUND\" and \"${_NAME_UPPER}_FOUND\" 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)
|
|
set(MISSING_VARS "${MISSING_VARS} ${_CURRENT_VAR}")
|
|
else()
|
|
set(DETAILS "${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()
|
|
set(FOUND_COMPONENTS_MSG "${FOUND_COMPONENTS_MSG} ${comp}")
|
|
|
|
else()
|
|
|
|
if(NOT DEFINED MISSING_COMPONENTS_MSG)
|
|
set(MISSING_COMPONENTS_MSG "missing components: ")
|
|
endif()
|
|
set(MISSING_COMPONENTS_MSG "${MISSING_COMPONENTS_MSG} ${comp}")
|
|
|
|
if(${_NAME}_FIND_REQUIRED_${comp})
|
|
set(${_NAME}_FOUND FALSE)
|
|
set(MISSING_VARS "${MISSING_VARS} ${comp}")
|
|
endif()
|
|
|
|
endif()
|
|
endforeach()
|
|
set(COMPONENT_MSG "${FOUND_COMPONENTS_MSG} ${MISSING_COMPONENTS_MSG}")
|
|
set(DETAILS "${DETAILS}[c${COMPONENT_MSG}]")
|
|
endif()
|
|
|
|
# version handling:
|
|
set(VERSION_MSG "")
|
|
set(VERSION_OK TRUE)
|
|
set(VERSION ${${FPHSA_VERSION_VAR}})
|
|
|
|
# check with DEFINED here as the requested or found version may be "0"
|
|
if (DEFINED ${_NAME}_FIND_VERSION)
|
|
if(DEFINED ${FPHSA_VERSION_VAR})
|
|
|
|
if(${_NAME}_FIND_VERSION_EXACT) # exact version required
|
|
# count the dots in the version string
|
|
string(REGEX REPLACE "[^.]" "" _VERSION_DOTS "${VERSION}")
|
|
# add one dot because there is one dot more than there are components
|
|
string(LENGTH "${_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 "^(${_VERSION_REGEX})\\..*" "\\1" _VERSION_HEAD "${VERSION}")
|
|
unset(_VERSION_REGEX)
|
|
if (NOT ${_NAME}_FIND_VERSION VERSION_EQUAL _VERSION_HEAD)
|
|
set(VERSION_MSG "Found unsuitable version \"${VERSION}\", but required is exact version \"${${_NAME}_FIND_VERSION}\"")
|
|
set(VERSION_OK FALSE)
|
|
else ()
|
|
set(VERSION_MSG "(found suitable exact version \"${VERSION}\")")
|
|
endif ()
|
|
unset(_VERSION_HEAD)
|
|
else ()
|
|
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 ()
|
|
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(${_NAME}_FOUND FALSE)
|
|
endif()
|
|
|
|
|
|
# print the result:
|
|
if (${_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)
|
|
_FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE}: ${VERSION_MSG} (found ${${_FIRST_REQUIRED_VAR}})")
|
|
else()
|
|
_FPHSA_FAILURE_MESSAGE("${FPHSA_FAIL_MESSAGE} (missing: ${MISSING_VARS}) ${VERSION_MSG}")
|
|
endif()
|
|
endif()
|
|
|
|
endif ()
|
|
|
|
set(${_NAME}_FOUND ${${_NAME}_FOUND} PARENT_SCOPE)
|
|
set(${_NAME_UPPER}_FOUND ${${_NAME}_FOUND} PARENT_SCOPE)
|
|
endfunction()
|