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#.rst:
# .. command:: generate_compatibility_version_file
#
# Create a version file for a project::
#
# generate_compatibility_version_file(<filename>
# [VERSION <major.minor.patch>]
# COMPATIBILITY <AnyNewerVersion|SameMajorVersion|ExactVersion>
# [C_ABI]
# [CXX_LAYOUT]
# [CXX_ABI])
#=============================================================================
# Copyright 2015 Sensics, Inc. <ryan@sensics.com>
# Copyright 2012 Alexander Neundorf <neundorf@kde.org>
#
# 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(CMakeParseArguments)
include(CMakePackageConfigHelpers)
set(GCVF_DIR "${CMAKE_CURRENT_LIST_DIR}" CACHE INTERNAL "" FORCE)
function(generate_compatibility_version_file _filename)
set(options C_ABI CXX_LAYOUT CXX_ABI)
set(oneValueArgs VERSION COMPATIBILITY )
set(multiValueArgs )
cmake_parse_arguments(GCVF "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
if(GCVF_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "Unknown keywords given to generate_compatibility_version_file(): ${GCVF_UNPARSED_ARGUMENTS}")
endif()
set(versionTemplateFile "${CMAKE_ROOT}/Modules/BasicConfigVersion-${GCVF_COMPATIBILITY}.cmake.in")
if(NOT EXISTS "${versionTemplateFile}")
message(FATAL_ERROR "Bad COMPATIBILITY value used for generate_compatibility_version_file(): \"${GCVF_COMPATIBILITY}\"")
endif()
if(GCVF_CXX_ABI)
set(GCVF_CXX_LAYOUT TRUE)
endif()
if(GCVF_CXX_LAYOUT)
set(GCVF_C_ABI TRUE)
endif()
if("${GCVF_VERSION}" STREQUAL "")
if("${PROJECT_VERSION}" STREQUAL "")
message(FATAL_ERROR "No VERSION specified for generate_compatibility_version_file()")
else()
set(GCVF_VERSION ${PROJECT_VERSION})
endif()
endif()
set(GCVF_WIN_CXXLAYOUT)
if(MSVC)
set(GCVF_WIN_CXXLAYOUT "MSVC")
elseif(MINGW)
set(GCVF_WIN_CXXLAYOUT "MinGW")
elseif(WIN32)
set(GCVF_WIN_CXXLAYOUT "other")
endif()
set(PREV_FILE "${_filename}.cmakeversion")
write_basic_package_version_file("${PREV_FILE}" VERSION ${GCVF_VERSION} COMPATIBILITY ${GCVF_COMPATIBILITY})
set(GCVF_BASIC TRUE)
foreach(level BASIC C_ABI CXX_LAYOUT CXX_ABI)
if(GCVF_${level})
file(READ "${PREV_FILE}" GCVF_PREVIOUS_FILE)
set(PREV_FILE "${_filename}.${level}")
configure_file("${GCVF_DIR}/CompatibilityVersionFile-${level}.cmake.in" "${PREV_FILE}" @ONLY)
endif()
endforeach()
configure_file("${PREV_FILE}" "${_filename}" COPYONLY)
endfunction()
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