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#.rst:
# ECMPackageConfigHelpers
# -----------------------
#
# Helper macros for generating CMake package config files.
#
# ``write_basic_package_version_file()`` is the same as the one provided by the
# CMakePackageConfigHelpers module in CMake; see that module's documentation for
# more information.
#
# ::
#
# ecm_configure_package_config_file(<input> <output>
# INSTALL_DESTINATION <path>
# [PATH_VARS <var1> [<var2> [...]]
# [NO_SET_AND_CHECK_MACRO]
# [NO_CHECK_REQUIRED_COMPONENTS_MACRO])
#
#
# This behaves in the same way as configure_package_config_file() from CMake
# 2.8.12, except that it adds an extra helper macro: find_dependency().
#
# ::
#
# find_dependency(<dep> [<version> [EXACT]])
#
# find_dependency() should be used instead of find_package() to find package
# dependencies. It forwards the correct parameters for EXACT, QUIET and
# REQUIRED which were passed to the original find_package() call. It also sets
# an informative diagnostic message if the dependency could not be found.
#
# Note that there is no argument to disable the find_dependency() macro; if you
# do not require this macro, you should just use the CMakeFindDependencyMacro
# module directly.
#
# CMake 3.0.0 will include a CMakeFindDependencyMacro module that will provide
# the find_dependency() macro (which you can include() in your package config
# file), so this file is only useful for projects whose minimum required version
# is 2.8.12.
#=============================================================================
# Copyright 2014 Alex Merry <alex.merry@kdemail.net>
# Copyright 2013 Stephen Kelly <steveire@gmail.com>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file COPYING-CMAKE-SCRIPTS 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 extra-cmake-modules, substitute the full
# License text for the above reference.)
include(${CMAKE_ROOT}/Modules/CMakePackageConfigHelpers.cmake)
set(_ecm_package_config_helpers_included TRUE)
if(NOT CMAKE_MINIMUM_REQUIRED_VERSION VERSION_LESS 2.8.13)
message(AUTHOR_WARNING "Your project already requires a version of CMake that includes the find_dependency macro via the CMakeFindDependencyMacro module. You should use CMakePackageConfigHelpers instead of ECMPackageConfigHelpers.")
endif()
function(ECM_CONFIGURE_PACKAGE_CONFIG_FILE _inputFile _outputFile)
set(options NO_SET_AND_CHECK_MACRO NO_CHECK_REQUIRED_COMPONENTS_MACRO)
set(oneValueArgs INSTALL_DESTINATION )
set(multiValueArgs PATH_VARS )
cmake_parse_arguments(CCF "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
if(CCF_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "Unknown keywords given to CONFIGURE_PACKAGE_CONFIG_FILE(): \"${CCF_UNPARSED_ARGUMENTS}\"")
endif()
if(NOT CCF_INSTALL_DESTINATION)
message(FATAL_ERROR "No INSTALL_DESTINATION given to CONFIGURE_PACKAGE_CONFIG_FILE()")
endif()
if(IS_ABSOLUTE "${CCF_INSTALL_DESTINATION}")
set(absInstallDir "${CCF_INSTALL_DESTINATION}")
else()
set(absInstallDir "${CMAKE_INSTALL_PREFIX}/${CCF_INSTALL_DESTINATION}")
endif()
file(RELATIVE_PATH PACKAGE_RELATIVE_PATH "${absInstallDir}" "${CMAKE_INSTALL_PREFIX}" )
foreach(var ${CCF_PATH_VARS})
if(NOT DEFINED ${var})
message(FATAL_ERROR "Variable ${var} does not exist")
else()
if(IS_ABSOLUTE "${${var}}")
string(REPLACE "${CMAKE_INSTALL_PREFIX}" "\${PACKAGE_PREFIX_DIR}"
PACKAGE_${var} "${${var}}")
else()
set(PACKAGE_${var} "\${PACKAGE_PREFIX_DIR}/${${var}}")
endif()
endif()
endforeach()
get_filename_component(inputFileName "${_inputFile}" NAME)
set(PACKAGE_INIT "
####### Expanded from @PACKAGE_INIT@ by configure_package_config_file() (ECM variant) #######
####### Any changes to this file will be overwritten by the next CMake run #######
####### The input file was ${inputFileName} #######
get_filename_component(PACKAGE_PREFIX_DIR \"\${CMAKE_CURRENT_LIST_DIR}/${PACKAGE_RELATIVE_PATH}\" ABSOLUTE)
")
if("${absInstallDir}" MATCHES "^(/usr)?/lib(64)?/.+")
# Handle "/usr move" symlinks created by some Linux distros.
set(PACKAGE_INIT "${PACKAGE_INIT}
# Use original install prefix when loaded through a \"/usr move\"
# cross-prefix symbolic link such as /lib -> /usr/lib.
get_filename_component(_realCurr \"\${CMAKE_CURRENT_LIST_DIR}\" REALPATH)
get_filename_component(_realOrig \"${absInstallDir}\" REALPATH)
if(_realCurr STREQUAL _realOrig)
set(PACKAGE_PREFIX_DIR \"${CMAKE_INSTALL_PREFIX}\")
endif()
unset(_realOrig)
unset(_realCurr)
")
endif()
if(NOT CCF_NO_SET_AND_CHECK_MACRO)
set(PACKAGE_INIT "${PACKAGE_INIT}
macro(set_and_check _var _file)
set(\${_var} \"\${_file}\")
if(NOT EXISTS \"\${_file}\")
message(FATAL_ERROR \"File or directory \${_file} referenced by variable \${_var} does not exist !\")
endif()
endmacro()
include(CMakeFindDependencyMacro OPTIONAL RESULT_VARIABLE _CMakeFindDependencyMacro_FOUND)
if (NOT _CMakeFindDependencyMacro_FOUND)
macro(find_dependency dep)
if (NOT \${dep}_FOUND)
set(ecm_fd_version)
if (\${ARGC} GREATER 1)
set(ecm_fd_version \${ARGV1})
endif()
set(ecm_fd_exact_arg)
if(\${CMAKE_FIND_PACKAGE_NAME}_FIND_VERSION_EXACT)
set(ecm_fd_exact_arg EXACT)
endif()
set(ecm_fd_quiet_arg)
if(\${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY)
set(ecm_fd_quiet_arg QUIET)
endif()
set(ecm_fd_required_arg)
if(\${CMAKE_FIND_PACKAGE_NAME}_FIND_REQUIRED)
set(ecm_fd_required_arg REQUIRED)
endif()
find_package(\${dep} \${ecm_fd_version}
\${ecm_fd_exact_arg}
\${ecm_fd_quiet_arg}
\${ecm_fd_required_arg}
)
if (NOT \${dep}_FOUND)
set(\${CMAKE_FIND_PACKAGE_NAME}_NOT_FOUND_MESSAGE \"\${CMAKE_FIND_PACKAGE_NAME} could not be found because dependency \${dep} could not be found.\")
set(\${CMAKE_FIND_PACKAGE_NAME}_FOUND False)
return()
endif()
set(ecm_fd_version)
set(ecm_fd_required_arg)
set(ecm_fd_quiet_arg)
set(ecm_fd_exact_arg)
endif()
endmacro()
endif()
")
endif()
if(NOT CCF_NO_CHECK_REQUIRED_COMPONENTS_MACRO)
set(PACKAGE_INIT "${PACKAGE_INIT}
macro(check_required_components _NAME)
foreach(comp \${\${_NAME}_FIND_COMPONENTS})
if(NOT \${_NAME}_\${comp}_FOUND)
if(\${_NAME}_FIND_REQUIRED_\${comp})
set(\${_NAME}_FOUND FALSE)
endif()
endif()
endforeach()
endmacro()
")
endif()
set(PACKAGE_INIT "${PACKAGE_INIT}
####################################################################################")
configure_file("${_inputFile}" "${_outputFile}" @ONLY)
endfunction()
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